CN104932235B - Image processing system - Google Patents
Image processing system Download PDFInfo
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- CN104932235B CN104932235B CN201510119125.0A CN201510119125A CN104932235B CN 104932235 B CN104932235 B CN 104932235B CN 201510119125 A CN201510119125 A CN 201510119125A CN 104932235 B CN104932235 B CN 104932235B
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- 238000012545 processing Methods 0.000 title claims abstract description 176
- 239000000463 material Substances 0.000 claims abstract description 145
- 238000010438 heat treatment Methods 0.000 claims abstract description 94
- 230000015572 biosynthetic process Effects 0.000 claims description 54
- 230000000630 rising effect Effects 0.000 claims description 15
- 238000007639 printing Methods 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 239000000123 paper Substances 0.000 description 270
- 238000012546 transfer Methods 0.000 description 65
- 239000011087 paperboard Substances 0.000 description 32
- 238000000034 method Methods 0.000 description 20
- 108091008695 photoreceptors Proteins 0.000 description 19
- 238000010023 transfer printing Methods 0.000 description 15
- 238000004140 cleaning Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 239000003086 colorant Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 238000012937 correction Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000002788 crimping Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000005055 memory storage Effects 0.000 description 2
- 230000000116 mitigating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2039—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat with means for controlling the fixing temperature
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2039—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat with means for controlling the fixing temperature
- G03G15/205—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat with means for controlling the fixing temperature specially for the mode of operation, e.g. standby, warming-up, error
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
A kind of image processing system, can reduce power consumption during fixing processing, and suppress the generation of curling.The image processing system of the present invention possesses fixing processing unit, and the fixing processing unit has the heating part for the heating for receiving thermal source and the pressurization part of clamp-press part is formed together with heating part.It is controlled the fixing control of intelligence of thermal source, during so that the fixing required heat of toner image is few, with required heat multidate ratio, the fixing temperature of fixing processing is set as it is relatively low, sheet material reach clamp-press part before make heating part temperature turn into fixing temperature more than temperature.Then, the first sheet material and the second sheet material for continuing through clamp-press part, when the fixing temperature of the second sheet material is higher than the fixing temperature of the first sheet material, perform the temperature difference limitation control for forming image so that the first sheet material is poor no more than ceiling temperature set in advance by heating part during clamp-press part and the temperature difference of pressurization part.
Description
Technical field
Proceed through heating the present invention relates to a kind of and make to be transferred to the processing that toner image on paper is fixed on paper
Image processing system, say in further detail, be related to the temperature for reducing fixing processing as much as possible and power consumption can be reduced
Image processing system.
Background technology
The general image processing system based on electrofax mode such as printer, duplicator has fixing processing unit, should
Fixing processing unit carries out the processing fixing for making to be transferred to the toner image on paper.Fixing processing unit passes through to carrying tune
The paper of toner picture is heated while pressurizeing to carry out fixing processing.By the paper of fixing processing unit can occur curling and
Bending.The paper crimped, which turns into, occurs the main cause of paperboard in the conveying after, also, the heap on carton sometimes
Obstacle can occur when folded.In addition, in the case where multipage binding paperses are bound into book form, it is also possible to cause bookbinding quality to decline.Therefore,
Expect to mitigate the amount of crimp that paper occurs as much as possible.
Then, in order to mitigate the amount of crimp of paper, the heating-up temperature to paper in fixing processing unit is controlled.For example,
A kind of image processing system has been recorded in patent document 1, its be in the first face and its back side the second face it is two-sided on continuously enter
In the duplex printing of row image formation, when carrying out the fixing processing in the first face, to the front end as conveying direction in the second face
Position, to carry out fixing processing less than the temperature at other positions.Thereby, it is possible to the amount of crimp for the front for mitigating the second face,
And reduce the bad problem of conveying when forming image on the second surface.
In addition, having recorded a kind of image processing system in patent document 2, it is in the width orthogonal with the conveying direction of paper
Spend on direction, fixing processing is carried out to two ends and center with different temperature.Specifically, when forming image on the first face,
Fixing processing is carried out to two ends with the temperature less than center.Also, when forming image on the second surface, with higher than centralised temperature and
Temperature higher than the fixing treatment temperature of the end when the first face forms image carries out fixing processing to two ends.Thereby, it is possible to
Suppress the generation of curling, so as to prevent paperboard.
Patent document 1：Japanese Unexamined Patent Publication 10-10915 publications
Patent document 2：Japanese Unexamined Patent Publication 2012-32654 publications
However, occurring in that a kind of image processing system in recent years, it is in order to reduce power consumption, according to the image to be formed
The temperature for entering to be about to fixing processing unit is suppressed to the fixing control of relatively low intelligence.Specifically, the toner image of image is formed
Toner adhesion amount is fewer, and the fixing control of intelligence more carries out fixing processing with low temperature., can be by by the fixing control of intelligence
Computer heating control is in Min., so as to reduce power consumption.For the image to be formed, the toner adhesion amount energy of toner image
The enough information such as any in concentration, text width, word size, colored and black and white is judged.
In the image processing system for carrying out the fixing control of such intelligence, the first paper of fixing processing is carried out with low temperature
In the case of passing sequentially through fixing processing unit with the second paper that fixing processing is carried out with high temperature, the second paper reaches fixing processing
Fixing processing unit must be made to be set to high temperature before portion.So, in this case, even if the first paper is in by being fixed processing unit
During, it is also necessary to make fixing processing unit heating.However, due in the first paper by fixing processing unit during start to rise
Temperature, the problem of causing easily to crimp in the presence of the first paper.Because above-mentioned any prior art does not all account for such
The fixing control of intelligence, so the problem of can not all solving to produce in the fixing control of such intelligence.
The content of the invention
The present invention is made for the purpose of solving the problems of above-mentioned prior art.In other words, it is of the invention
Problem is to provide a kind of power consumption that can be reduced and be fixed when handling, and suppresses the image processing system of the generation of curling.
The image processing system of the invention made for the purpose of solving the problem has：Image forming part, it is formed
Toner image, by the way that the toner image is transferred on sheet material, forms toner image on sheet material；Fixing processing unit, it has
Receive the heating part of the heating of thermal source and the pressurization part of clamp-press part is collectively forming with heating part, make the piece transferred with toner image
Material carries out fixing processing by clamp-press part；Apparatus control portion, each several part of its control device and carry out image and formed；The image
Forming apparatus is characterised by having：Heated side temperature output section, it exports the temperature for representing heating part in the position of clamp-press part
Heated side temperature value；Pressure side temperature output section, it exports the pressure side for representing pressurization part in the temperature of the position of clamp-press part
Temperature value；When the fixing required heat for the toner image being transferred to using image forming part on sheet material is few, needed for fixing
Heat multidate ratio, apparatus control portion by sheet material by the target of heated side temperature value during clamp-press part be fixing temperature set
To be relatively low；Apparatus control portion is controlled the fixing control of intelligence of the heating of thermal source so that heated before sheet material reaches clamp-press part
Side temperature value turns into the temperature more than fixing temperature set by the sheet material；Also, first for continuing through clamp-press part
The second sheet material after sheet material and the first sheet material, when the fixing temperature of the second sheet material is higher than the fixing temperature of the first sheet material, dress
Put control unit perform to be formed image temperature difference limitation control so that the first sheet material by heated side temperature value during clamp-press part with
The difference of pressure side temperature value is that temperature difference is poor no more than ceiling temperature set in advance.
The image processing system of the present invention carries out the heating of thermal source using the fixing control of intelligence with Min., thus reduces
The power consumption of fixing processing unit.In the case where carrying out the fixing control of intelligence, the fixing temperature of the second sheet material is higher than the first sheet material
Fixing temperature when, during the first sheet material is by clamp-press part, the temperature difference of heating part and pressurization part in clamp-press part becomes big,
May the more serious curling of the first sheet material generation.Then, schemed using in the way of making temperature difference no more than ceiling temperature difference
As the temperature difference limitation control formed, degree that the first sheet material crimps can be reduced and suppress paperboard.
Moreover, in above-mentioned image processing system, preferably heated side temperature output section is detection heating part in clamp-press part
The sensor of the temperature of position, pressure side temperature output section is the sensor for detecting pressurization part in the temperature of the position of clamp-press part,
The heating that apparatus control portion reaches the value being redefined for below ceiling temperature difference in temperature difference limitation control, in temperature difference stops
Only during temperature difference, stop the heating of thermal source.This be due to can be based on clamp-press part heating part and pressurization part actual temperature it is poor,
Reliably make temperature difference poor no more than ceiling temperature.Suppress paperboard thereby, it is possible to mitigate degree that the first sheet material crimps.
Moreover, in above-mentioned image processing system, preferably heated side temperature output section and pressure side temperature output section are dresses
Put control unit；Apparatus control portion makes first before the toner image of the first sheet material is initially formed using image forming part to one side
Sheet material is by clamp-press part while when being heated using thermal source and the heated side temperature value is risen to the fixing temperature of the second sheet material
Heated side temperature value and pressure side temperature value emulated；Based on by emulating the heated side temperature value obtained and pressure side temperature
Angle value, the guess value of the temperature difference when rear end for obtaining the first sheet material reaches clamp-press part speculates temperature difference；In the supposition obtained
In the case that temperature difference exceedes ceiling temperature difference, determine to perform temperature difference limitation control；Determining to perform temperature difference limitation control
In the case of, temperature difference limitation control is performed when forming the image of the first sheet material.This is due to deduce folder by emulation
The heating part of splenium and the actual temperature difference of pressurization part carry out temperature difference limitation when exceeding ceiling temperature difference and controlled, can be by temperature
Difference suppresses following in ceiling temperature difference.Suppress paperboard thereby, it is possible to mitigate degree that the first sheet material crimps.
Moreover, in above-mentioned image processing system, apparatus control portion is in simulations based on calculated heated side temperature value
And pressure side temperature value, obtain the first sheet material and exceeded by the opportunity poor more than ceiling temperature of the temperature difference during clamp-press part
Opportunity；In temperature difference limitation control, in the heating more than stopping thermal source before opportunity obtained by emulation；In the first sheet material
Rear end passed through after clamp-press part, can restart the heating of the thermal source stopped.This is due to that can mitigate first
Degree that sheet material is crimped and suppressing paperboard this point will not change.
Moreover, in above-mentioned image processing system, apparatus control portion limits the heating of thermal source in temperature difference limits control,
So that heated side temperature value is slower than the rising degree in emulation in the rising degree that temperature difference is limited in control.This is due to energy
Enough mitigate degree that the first sheet material crimps and suppressing paperboard this point will not change.
Moreover, in above-mentioned image processing system, preferred embodiment control unit is limited in temperature difference in control, the first sheet material
Front end reach image forming part before and the first sheet material rear end pass through after image forming part the first sheet material front end reach clamp
The transporting velocity of the first sheet material of at least one party during portion is slower than the transporting velocity of the first sheet material in emulation.This is due to
It is able to maintain that formed picture quality is higher, and degree that the first sheet material crimps can be mitigated and suppress paperboard.Separately
Outside, " slowing down transporting velocity " also includes temporarily ceasing the conveying of the first sheet material.
Moreover, in above-mentioned image processing system, apparatus control portion can make to utilize thermal source in temperature difference limitation control
The rising that is later than in emulation of heating rising beginning opportunity for beginning to ramp up heated side temperature value start opportunity.This is due to energy
Enough mitigate degree that the first sheet material crimps and suppressing paperboard this point will not change.
Moreover, in above-mentioned image processing system, preferred embodiment control unit makes to utilize thermal source in temperature difference limitation control
Heating rising beginning opportunity for beginning to ramp up heated side temperature value start opportunity earlier than the rising in emulation.This is due to energy
It is enough to suppress temperature difference below ceiling temperature difference and the degree of the first curl of sheet of mitigation, and maintain productivity ratio higher.
Moreover, in above-mentioned image processing system, having：Turning part, it makes to be formed on the first face by clamp-press part
There is the positive and negative upset of the sheet material of image；Two-sided carrying path, it is in order to be formation figure on the second face at the back side in first face
Picture, the position than image forming part close to upstream is again fed to by the sheet material for having passed through turning part；It is preferred that in the first sheet material
When fixing processing is implemented in first face in the duplex printing with carrying out image formation on the second face successively to the first face, apparatus control portion
Carry out temperature difference limitation control.For sheet material, after using turning part upset positive and negative, the rear end during image formation in the first face
Front end when image as the second face is formed.In addition, formed the first face image when, because sheet material by clamp-press part sheet material
Rear end side easily occur serious curling.That is, the volume of front position when being formed by suppressing the image in the second face
Song, can prevent the paperboard during image formation in the second face.In addition, in the case of only forming image on the first face and the
In the case of forming image on two faces, because positive and negative need not be overturn afterwards, even if therefore more or less being crimped, hair
The frequency of raw paperboard is also low.
Moreover, in above-mentioned image processing system, having：Turning part, it makes to be formed on the first face by clamp-press part
There is the positive and negative upset of the sheet material of image；Two-sided carrying path, it is in order to be formation figure on the second face at the back side in first face
Picture, the position than image forming part close to upstream is again fed to by the sheet material for having passed through turning part；Apparatus control portion can be
The fixing temperature of second sheet material is less than the fixing temperature of the first sheet material, and the determining by the sheet material of clamp-press part before the first sheet material
Shadow temperature be less than the first sheet material fixing temperature, and the first sheet material on the first side thereof formed image sheet material, second
Material is when forming the sheet material of image on a second side by two-sided carrying path, in the advance of the image formation of the first sheet material
The image of the sheet material of row second is formed, and performs temperature difference limitation control in the image formation of the second sheet material.This is due to energy
Enough mitigate degree that the first sheet material crimps and suppressing paperboard this point will not change.
Moreover, in above-mentioned image processing system, with storage part, the storage part stores the thickness of the first sheet material, first
Sheet material length in the conveying direction, the first sheet material are poor by least one condition and ceiling temperature in speed during clamp-press part
Relation be the poor table of ceiling temperature, apparatus control portion can be in temperature difference limitation control, using true with reference to the poor table of ceiling temperature
Fixed value is poor as ceiling temperature.This is due to, based on these conditions, even if poor using different values as ceiling temperature, also can
Enough generation this point for suppressing curling will not change.
In accordance with the invention it is possible to a kind of power consumption that can be reduced and be fixed processing is provided, and suppress the generation of curling
Image processing system.
Brief description of the drawings
Fig. 1 is the figure for representing image processing system.
Fig. 2 is the figure for the fixing processing unit for representing image processing system.
Fig. 3 is the schematic diagram of the control structure of image processing system.
Fig. 4 is the figure for illustrating the fixing control of intelligence.
Fig. 5 is the curve for representing to make paper by the temperature of fixing processing unit during fixing clamp-press part under low temperature mode
Figure.
Fig. 6 is the curve map for representing to make paper by the temperature of fixing processing unit during fixing clamp-press part in heating.
Fig. 7 is for illustrating that the temperature difference of first method limits the curve map of control.
Fig. 8 is for illustrating that the temperature difference of second method limits the curve map of control.
Fig. 9 is for illustrating that the temperature difference of Third Way limits the curve map of control.
Figure 10 is for illustrating that the temperature difference of fourth way limits the curve map of control.
Figure 11 is for illustrating that the temperature difference of the 5th mode limits the curve map of control.
Figure 12 is for illustrating that the temperature difference of the 6th mode limits the curve map of control.
Description of reference numerals
1 image processing system, 4CPU, 10 image forming parts, 70 fixing processing units, 71 backer rolls, 72 fixing rollers, 73 heating
Roller, 74 heaters, 75 fixing bands, N2 are fixed clamp-press part, P paper.
Embodiment
Hereinafter, the embodiment for embodying the present invention is described in detail referring to the drawings.
[first method]
Fig. 1 represents the general configuration of the image processing system 1 of the manner.Image processing system 1 is with intermediate transfer belt
The color printer of 30 so-called tandem.Intermediate transfer belt 30 is conductive ring-shaped tape member, and it is in the Fig. 1
Both ends are supported by roller 31,32.When image is formed, the roller 31 on right side is revolved counterclockwise according to shown in arrow in figure in Fig. 1
Turn driving.Thus, in intermediate transfer belt 30 and Fig. 1 the roller 32 in left side into figure, direction shown in arrow carries out driven rotation respectively.
In intermediate transfer belt 30 by Fig. 1 in the outer peripheral face of part that supports of roller 31 on right side be provided with secondary transfer roller 40.
Secondary transfer roller 40 presses to intermediate transfer belt 30 along the direction (left-hand in Fig. 1) vertical with its axle and contacted.In centre
What transfer belt 30 was contacted with secondary transfer roller 40 is formed in part with the toner image on intermediate transfer belt 30 being transferred on paper P
Secondary transfer printing clamp-press part N1.Secondary transfer roller 40 is crimped when image is formed and produced using the intermediate transfer belt 30 with rotation
Frictional force carry out driven rotation.
Also, in intermediate transfer belt 30 by Fig. 1 in the outer peripheral face of part that supports of roller 32 in left side be provided with band sanitizer cartridge
Put 41.It is used to reclaim the toner being attached on the surface of intermediate transfer belt 30 with cleaning device 41.That is, with cleaning device
41 are used for transfer residual toner that recovery is not transferred in secondary transfer printing clamp-press part N1 on paper P etc..
Bottom in Fig. 1 of intermediate transfer belt 30, is configured with yellow (Y), pinkish red (M), blue or green (C), black successively from left to right
(K) assorted image forming part 10Y, 10M, 10C, 10K.Image forming part 10Y, 10M, 10C, 10K contribute to form correspondence
The toner image of color and the device being transferred on intermediate transfer belt 30, image forming part 10Y, 10M, 10C, 10K structure
It is all identical.Therefore, in Fig. 1, it is labelled with reference using image forming part 10Y as representative.
There is cylindric electrostatic latent image supporting body to be photoreceptor 11 and configuration by image forming part 10Y, 10M, 10C, 10K
Charging system 12, exposure device 13, developing apparatus 14, primary transfer roller 15 around photoreceptor 11.Charging system 12 is used for
Make the uniformly powered of photoreceptor 11.Exposure device 13 is used for image of the surface irradiation based on correspondence color to photoreceptor 11
The laser of data and form electrostatic latent image.Developing apparatus 14 is used to supply the toner of storage to the surface of photoreceptor 11.
Primary transfer roller 15 is configured in the position relative with photoreceptor 11 across intermediate transfer belt 30.The edge of primary transfer roller 15
The direction (in Fig. 1 lower direction) vertical with its axle presses to intermediate transfer belt 30 and contacted.Because of the crimping in intermediate transfer
The toner image being formed with 30 each several parts contacted with photoreceptor 11 on the photoreceptor 11 for making colors is transferred to intermediate transfer belt
Primary transfer clamp-press part on 30.
It should be noted that the image forming part 10Y, 10M, 10C, 10K of the manner are to reclaim sense using developing apparatus 14
Non-transfer toner in body of light 11 without cleaning type image forming part.However, it is possible to for reclaiming from photoreceptor 11
The photoreceptor cleaning device of the non-transfer toner on intermediate transfer belt 30.As photoreceptor cleaning device, enumerate tabular and
The device that one end is contacted with the outer peripheral face of photoreceptor 11.Or other cleaning members, such as fixed brush, rotation can also be used
Turn brush, roller or the cleaning member by multiple component combinations formation in these parts.
Also, the top in Fig. 1 of intermediate transfer belt 30 is configured with the toner bottle 20Y for being accommodated with each colour toners,
20M, 20C, 20K, each colour toners for being accommodated in these toner bottles are suitably fed to assorted developing apparatus 14 respectively.
Paper feeding cassette 51 is installed in the bottom of image processing system 1.It is provided with upward from the right side in Fig. 1 of paper feeding cassette 51
Carrying path 50.Be accommodated in by loading the paper P of paper feeding cassette 51 using paper feed roller 52 since the paper of its topmost by
Page ground is exported to carrying path 50.
Be configured with a pair of alignment regulating rollers 53 successively on the paper P exported from paper feeding cassette 51 carrying path 50, it is secondary
Transfer clamp-press part N1, fixing clamp-press part N2 and exit roller 54.It is provided with and is completed for discharge in the further downstream of carrying path 50
The paper P of image formation paper delivery portion 55.Alignment regulating roller 53 is used to finely tune export paper P to secondary transfer printing clamp-press part N1
Opportunity.Fixing clamp-press part N2 is used for the fixing processing that toner image is fixed being transferred into enforcement on paper P, by being fixed processing unit
70 form.
Reference picture 2 illustrates the fixing processing unit 70 of the manner.As shown in Fig. 2 fixing processing unit 70 is by backer roll 71, fixing
Roller 72, heating roller 73, heater 74, fixing band 75, temperature sensor 76 are constituted, wherein, it is fixing in addition to backer roll 71
Roller 72, heating roller 73, heater 74, fixing band 75 and temperature sensor 76 are configured in the surface side of paper P carrying toner.
Fixing 70 pairs of processing unit is carried out for making the fixing fixing processing of toner image by the paper P conveyed on carrying path 50.
As shown in Fig. 2 being wrapping with fixing band 75 on fixing roller 72 and heating roller 73.Heater 74 is provided in heating
Thermal source inside roller 73.Temperature sensor 76 is used for the temperature for detecting heating roller 73.Therefore, fixing roller 72, heating roller 73, heating
Device 74, fixing band 75, temperature sensor 76 are the structure members of heated side.On the other hand, backer roll 71 is across fixing band 75
Configuration is in the position relative with fixing roller 72.Backer roll 71 is crimped on the outer peripheral face of fixing band 75, is formed in the contact portion
There is fixing clamp-press part N2.Therefore, backer roll 71 is the structure member of pressure side.
Fixing roller 72 is driven counterclockwise when performing fixing processing according to shown in arrow in Fig. 2.Pass through the fixing roller
72 rotation, backer roll 71, heating roller 73 and fixing band 75 each carry out driven rotation.Heating roller 73 is added by heater 74
Heat, so that the temperature detected by temperature sensor 76 is set point of temperature.Thus, fixing band 75, the temperature of fixing roller 72 also rise
It is high.Paper P is heated while being pressurized when by fixing clamp-press part N2.By the fixing processing, toner image is fixed
On paper P.
As shown in figure 1, the image processing system 1 of the manner has two-sided carrying path 60.Two-sided carrying path 60 is used for
The paper P for once having passed through carrying path 50 is conveyed to carrying path 50 again.Thus, image processing system 1 can be in paper
Open P two-sided upper formation image.It should be noted that in each position of carrying path 50, two-sided carrying path 60 provided with use
In the arrival for detecting paper P, the sensor passed through.
Fig. 2 substantially represents the control structure of image processing system 1.In order to carry out the control of each several part, image processing system 1
With engine part 2 and control unit 3.Engine part 2 has the CPU4 for carrying out overall control process and is attached to the non-volatile of main body
Property memory 5.
Nonvolatile memory 5 is stored with such as rotary speed of roller 31, the rotary speed of each photoreceptor 11, paper P
Transporting velocity etc. is respectively worth, the upper limit of be also stored with fixing clamp-press part N2 fixing band 75 and the temperature difference being allowed of backer roll 71
Value is ceiling temperature difference TDlim etc..On ceiling temperature difference TDlim, it will be described in more detail below.
CPU4 is controlled based on the value being stored in nonvolatile memory 5 to each several part of image processing system 1,
Thus the task of image formation is performed.In other words, in the task of execution, to photoreceptor 11, roller 31, related to paper P conveying
The rotation of each roller etc. be controlled.In addition, the heating also to heater 74 is controlled, to ensure temperature sensor 76
Detection temperature be set point of temperature for carrying out fixing processing.In addition, CPU4, which is utilized, is arranged on carrying path 50 and two-sided defeated
Send the sensor at each position of path 60 conveyed in paper P physical location.Therefore, CPU4 is by comparing by control
The target location for the paper P for conveying and setting and the physical location obtained by the sensor of the grade of carrying path 50, are capable of detecting when
Whether paper P occurs paperboard etc..In addition, information of the CPU4 of the manner according to the image formation task being transfused to, by rear
The emulation that face is described in detail, the temperature of the fixing band 75 and backer roll 71 in fixing clamp-press part N2 positions can be calculated respectively.
Engine part 2 is not only controlled to the various loads 6 of image processing system 1, and carries out being attached to each unit
The write-in or reading of nonvolatile memory 7.Various loads 6 are such as including toner bottle, imaging unit.It is being attached to each list
In the nonvolatile memory 7 of member, such as the memory storage Toner allowance for being attached to toner bottle, it is attached to imaging single
Memory storage number of print pages of member etc..
Control unit 3 and outside computer etc. be connecteds and receive instruction and input.For example, by receiving image shape from computer
Into instruction, image formation task is generated in image processing system 1.In addition, exchanging a count value by engine part 2 and control unit 3
Various information such as (De ッ ト カ ウ ン タ ー values).
Then, an example of the common image formation action of the image processing system 1 of simple declaration the manner.Below
Explanation be using under the color mode of the toner formation coloured image of four colors on the paper P for be accommodated in paper feeding cassette 51
Image formation action an example.Formed coloured image when, intermediate transfer belt 30 and colors photoreceptor 11 respectively with
Defined circumferential speed rotates progress according to direction shown in arrow in Fig. 1.
Then, the outer peripheral face of photoreceptor 11 is substantially evenly powered using Charging system 12.Using exposure device 13, to band
The outer peripheral face of the photoreceptor 11 of electricity irradiates light corresponding with view data and forms electrostatic latent image.Utilize the exposure of the exposure device 13
The beginning started as image formation of light.Then, the developed device 14 of electrostatic latent image develops, and toning is formed on photoreceptor 11
Agent picture.Assorted toner image is transferred (once in primary transfer clamp-press part formed by the crimping by primary transfer roller 15
Transfer) on intermediate transfer belt 30.Thus, overlapping yellow (Y), pinkish red (M), blue or green (C), black (K) successively on the intermediary transfer belt 30
Toner image.Then, using the rotation of intermediate transfer belt 30, the toner image of four overlapping colors is transported to secondary turn
Print clamp-press part N1.
On the other hand, the paper P for being accommodated in paper feeding cassette 51 is extracted to carrying path 50 page by page since topmost.Quilt
The paper P of extraction is transported to secondary transfer printing clamp-press part N1 along carrying path 50.Paper P enter secondary transfer printing clamp-press part N1 when
Machine is finely adjusted using regulating roller 53 is directed at so that the opportunity presss from both sides with the toner image on intermediate transfer belt 30 into secondary transfer printing
Splenium N1 opportunity is consistent.Thus, in secondary transfer printing clamp-press part N1, the toner images of four overlapping colors is transferred (secondary
Transfer) on paper P.
Further conveyed transferred with the paper P of toner image to the downstream of carrying path 50.That is, in paper
P is discharged to paper delivery portion 55 after fixing clamp-press part N2 is carried out the fixing processing of toner image using exit roller 54.Need
Illustrate, after secondary transfer printing clamp-press part N1 has been passed through, residual transfer residual toner on the intermediary transfer belt 30 also by
Band cleaning device 41 is reclaimed, and thus, transfer residual toner is removed from intermediate transfer belt 30.
In addition, in the case where carrying out duplex printing to paper P, figure is formed with the first face by carrying path 50
The paper P of picture using exit roller 54 while carry out positive and negative upset, while being transported to two-sided carrying path 60.That is,
In the image processing system 1 of the manner, exit roller 54 doubles as making the turning part that paper P positive and negative is overturn.Then, pass through
The paper P of two-sided carrying path 60 is transported to carrying path 50 again.Thereby, it is possible to opposite with the first face in paper P
Image is formed on second face.The rear of paper P for being formed with image on two-sided in this way is discharged to exit roller 55.
Here, image processing system 1 can carry out accordingly setting the temperature of fixing processing unit 70 with the image to be formed
Control is fixed for the intelligence of different temperatures.Specifically, it is fixed in the intelligence of the manner in control, the tune with the image to be formed
Heating of the toner adhesion amount of toner picture accordingly to heater 74 is controlled.That is, toner adhesion amount is being carried
The paper P of few toner image is by being fixed clamp-press part N2 time controls refrigerating/heating apparatus 74 so that heating-up temperature, which is less than, carries tune
The paper P of toner image more than toner adhesion amount passes through heating-up temperature during fixing clamp-press part N2.Reason for this is that toner adhesion amount
With toner adhesion amount multidate ratio when few, using low temperature heating toner image can be made to be fixed on paper P.
In addition, being determined using the fixing control of intelligence the paper P for carrying the few toner image of toner adhesion amount
In the case of shadow processing, power consumption can be suppressed.It should be noted that being mixed colours in the image processing system 1 of the manner
In the case of the fixing processing of coloured image more than agent adhesion amount, so that fixing clamp-press part N2 paper P heating-up temperature is set to
Fixing temperature T1 set in advance normal mode carries out fixing processing.On the other hand, few black of toner adhesion amount is being carried out
In the case of the fixing processing of white image, determine so that paper P heating-up temperature is set to lower than the fixing temperature T1 of normal mode
Shadow temperature T2 low temperature mode carries out fixing processing.That is, image processing system 1 the different normal mode of temperature with it is low
The warm mode transfer formula for being fixed processing unit 70 is switched between warm pattern and fixing processing is carried out.
It should be noted that think in the manner, when forming coloured image when forming black white image compared with toner
Toner adhesion amount as in is more and carries out the switching of warm mode transfer formula.But it is also possible to be judged based on other information with usual mould
Which pattern in formula and low temperature mode carries out fixing processing.In the judgement, except the image to be formed be coloured image and
Outside any in black white image, text width, word size, image color of the image to be formed etc. can also be used to believe
Breath.In addition it is also possible to be judged based on the relevant informix of the toner adhesion amount for the toner image to be formed with usual mould
Which pattern in formula and low temperature mode carries out fixing processing.In addition, such as when forming glossy image, even if toner
Adhesion amount is few, also sets fixing temperature higher sometimes.It is therefore also considered that the information outside the relevant information of toner adhesion amount
And determine fixing processing is carried out with which pattern in normal mode and low temperature mode.
Illustrate the example of the fixing control of intelligence using Fig. 4.Fig. 4 is used for sequentially forming multiple images A, B, determining during C
The figure that the temperature change of shadow processing unit 70 is illustrated.In Fig. 4, the process of time is represented from left to right.Image A, C are black and white
Image, image B is coloured image.Therefore, to image A, C carries out fixing processing with low temperature mode, and to image B with normal mode
Carry out fixing processing.
First, as shown in figure 4, CPU4 sends image A, B, C print command when performing image formation task successively.Need
It is noted that the matching for the image and next image of the image that the print command of each image is related to based on print command
Data (マ ッ プ デ ー タ) etc. form relevant information with image and generated.That is, image A print command is based on image A
And image B Infomiation Production, image B information generation of the print command based on image B and image C, and image C print command
It is based only upon image C information generation.It should be noted that in the case of carrying out next image formation after image C, it is considered to
The information generation image C of image print command.
Then, the print command based on each image, is started in photoreceptor 11 using the exposure device 13 of image forming part 10
On be exposed.Afterwards, each image of development is transferred on paper P in secondary transfer printing clamp-press part N1 respectively, and by fixing
Clamp-press part N2.In Fig. 4, with t1 represent since the exposure to image A to image A front end reach fixing clamp-press part N2 when
Between, represent that reaching a certain position to image B front end from the front end of the image A by conveying reaches a certain position of identical with t2
Time.Time t1, t2 is the known value when sending image A print command, because image A print command is based on figure
As A and image B information is generated.
Here, carrying out fixing processing to image B with normal mode to image A with low temperature mode.Wherein, it is attached to toner
The few black white image of the amount of wearing is image A, even if carrying out fixing processing, image with the temperature of the fixing temperature T2 higher than low temperature mode
Quality will not also decline.On the other hand, to image B, it is fixed with the temperature of the fixing temperature T1 less than normal mode
It may decline image quality in the case of processing.Reason for this is that：In order to make toner image be fixed well on paper P,
Need suitably to be heated according to the toner adhesion amount of toner image.
Therefore, as shown in figure 4, in image processing system 1, when image B front end reaches fixing clamp-press part N2, controlling
Heater 74 is so that fixing clamp-press part N2 heating-up temperature reaches the fixing temperature T1 of normal mode.Here, as shown in figure 4,
In order that fixing clamp-press part N2 heating-up temperature rises to fixing temperature T1, it is necessary to time t3 before image B front end is reached.
Time t3 be in order that fixing clamp-press part N2 heating-up temperature from fixing temperature T2 rise to fixing temperature T1 needed for most in short-term
Between.Therefore, the most short heating-up time is used as using t3 below.Therefore, shift to an earlier date most when the front end than image B reaches fixing clamp-press part N2
Short heating-up time t3, normal mode is switched to by warm mode transfer formula from low temperature mode.
In addition, most short heating-up time t3 is also the known value when sending image A print command.Due to time t1, t2,
T3 is known, so being switched in Fig. 4 with the Δ t exposures since image A represented up to by warm mode transfer formula from low temperature mode
Time during for normal mode is also the known value when sending image A print command.In addition, time t1, t2 in Fig. 4,
T3 and time Δ t are the time when image quality that will be formed is set to usual degree and improves production efficiency as much as possible.
As shown in figure 4, being fixed clamp-press part N2 heating temperature after normal mode is switched to transferred with image A paper P
Spend during rising to fixing temperature T1 from fixing temperature T2 by being fixed clamp-press part N2.
Fixing temperature T2 more than of the heating-up temperature of fixing clamp-press part N2 in heating in low temperature mode.Therefore, not because logical
Cross heating in fixing clamp-press part N2 and cause image A image quality to decline.But, pass through the fixing clamp-press part in heating
N2 image A paper P causes the curling of the degree of paperboard in the conveying after.
Then, illustrate to have passed through the situation that the paper P of the fixing clamp-press part N2 in heating is crimped.Fig. 5 is to represent to make
The curve map that paper P passes through the temperature of fixing processing unit 70 during the fixing clamp-press part N2 of low temperature mode.When Fig. 5 transverse axis is represented
Between, the longitudinal axis represent temperature.Also, in Figure 5, the temperature on fixing processing unit 70, temperature sensor is represented with double dot dash line
76 detection temperature, represents temperature of the fixing band 75 near fixing clamp-press part N2 with solid line, is represented by dotted lines backer roll 71 and exists
Temperature near fixing clamp-press part N2.
To the temperature of fixing band 75 and backer roll 71 near fixing clamp-press part N2, it is used to examine by being arranged on each position
The sensor of testing temperature is detected.Moreover, Fig. 5 represents to make paper P pass through the fixing temperature T2 states in low temperature mode
The temperature detected by each sensor during fixing clamp-press part N2.
As shown in figure 5, temperature of the fixing band 75 near fixing clamp-press part N2 maintains fixing temperature T2.As it was previously stated,
Fixing band 75 is the structure member of the surface side of paper P carrying toner image.By making fixing band 75 attached in fixing clamp-press part N2
Near temperature is fixing temperature T2, can carry out fixing processing to the toner image for being carried on paper P with low temperature mode.
It should be noted that the paper P that the temperature Yin Qire of fixing band 75 is passed fixing clamp-press part N2 captures and dropped
It is low.But, the heating of the heated device 74 of amount of the temperature of the reduction and supplement, so fixing band 75 is in fixing clamp-press part N2
Neighbouring temperature also substantially maintains fixing temperature T2 during paper P is by fixing clamp-press part N2.Also, temperature sensor 76
Detection temperature maintain slightly higher than fixing temperature T2 temperature.Because the test position of temperature sensor 76 is than fixed
Shadow clamp-press part N2 is closer to the position of heater 74.
Temperature of the backer roll 71 near fixing clamp-press part N2 is maintained somewhat before paper P reaches fixing clamp-press part N2
Less than fixing temperature T2 temperature.This is due to that backer roll 71 utilizes the heat conduction from fixing band 75 without thermal source and added
Heat.In Figure 5, represent that the fixing band 75 that paper P is reached before being fixed clamp-press part N2 is attached in fixing clamp-press part N2 with temperature difference TD1
The difference of temperature of the near temperature with backer roll 71 near fixing clamp-press part N2.
As shown in figure 5, temperature of the backer roll 71 near fixing clamp-press part N2 is because paper P is by fixing clamp-press part N2
Reduction.Because the heat of backer roll 71 is captured by the paper P by being fixed clamp-press part N2, also, pass through fixing folder in paper P
During splenium N2, the heat conduction from fixing band 75 is blocked by paper P.
The temperature of backer roll 71 is persistently reduced during paper P is by fixing clamp-press part N2, reaches fixed in paper P rear end
Reached during shadow clamp-press part N2 minimum.Fixing cramping when representing that paper P rear end reaches fixing clamp-press part N2 with temperature difference TD2
The difference of the temperature of fixing band 75 near portion N2 and the temperature of backer roll 71.
Temperature difference TD2 when paper P rear end reaches fixing clamp-press part N2 is more than paper P and reached before fixing clamp-press part N2
Temperature difference TD1.Also, the temperature difference of the fixing band 75 near fixing clamp-press part N2 and backer roll 71 is from passing through fixing clamp-press part N2
Paper P front end gradually increase to rear end.For paper P, clamp-press part N2 fixing band 75 and the temperature of backer roll 71 are fixed
Degree difference is bigger, more serious by the curling occurred after the fixing clamp-press part N2.That is, having passed through fixing cramping in Figure 5
The curling more serious than front occurs for portion N2 paper P rear end side.But, the temperature difference TD2 shown in Fig. 5 does not have so
Greatly, passed through fixing clamp-press part N2 paper P do not occur at after conveying in cause the curling of the degree of paperboard seriously.
Then, the temperature for making paper P by the fixing processing unit 70 during fixing clamp-press part N2 in heating is represented in figure 6
Degree.In other words, Fig. 6 is after normal mode is switched to from low temperature mode, is fixed clamp-press part N2 heating-up temperature by fixing temperature
T2 rise to fixing temperature T1 during, the curve map of the temperature of fixing processing units 70 of paper P when passing through fixing clamp-press part N2.Should
Fig. 6 situation is different from Fig. 5 situation, and as illustrated in Fig. 4, paper P is sent out sometimes in the conveying after
Life causes the curling of the degree of paperboard.
As shown in fig. 6, temperature of the fixing band 75 near fixing clamp-press part N2 is before paper P reaches fixing clamp-press part N2
Begun to ramp up from fixing temperature T2.Temperature of the paper P near the fixing clamp-press part N2 of fixing band 75 rises from fixing temperature T2
To passing through fixing clamp-press part N2 during fixing temperature T1.
On the other hand, temperature of the backer roll 71 near fixing clamp-press part N2 is dropped by fixing clamp-press part N2 because of paper P
It is low, reached when paper P rear end reaches fixing clamp-press part N2 minimum.In figure 6, represent that paper P rear end reaches fixed with TD3
The temperature of the fixing band 75 near fixing clamp-press part N2 during shadow clamp-press part N2 and the temperature difference of backer roll 71.
As shown in fig. 6, temperature difference TD3 when paper P rear end reaches fixing clamp-press part N2, which is more than paper P, reaches fixing folder
Temperature difference TD1 before splenium N2.Also, the temperature difference of the fixing band 75 near fixing clamp-press part N2 and backer roll 71 is from passing through
Fixing clamp-press part N2 paper P front end gradually increases to rear end.Therefore, in figure 6, fixing clamp-press part N2 paper is being passed through
Open curling of the P rear end side generation than front seriously.
In Figure 5, as it was previously stated, temperature of the fixing band 75 near fixing clamp-press part N2 is maintained one with fixing temperature T2
It is fixed, and temperature reduction of the backer roll 71 near fixing clamp-press part N2.On the other hand, in figure 6, fixing band 75 is in fixing cramping
Portion N2 temperature rises from fixing temperature T2, on the other hand, temperature reduction of the backer roll 71 near fixing clamp-press part N2.Cause
This, in figure 6, temperature difference TD3 when paper P rear end reaches fixing clamp-press part N2 is more than Fig. 5 temperature difference TD2.Namely
Say in the case shown in fig. 6, more serious curling occurs compared with the situation shown in Fig. 5.In the case of fig. 6, pass through
It some times happens that causing the serious curling of paperboard degree in conveyings of the fixing clamp-press part N2 paper P after.
Then, in order to suppress paper P serious curling occurs for the image processing system 1 of the manner, carry out fixing band 75 with
The fixing processing that the temperature difference of backer roll 71 does not increase.In other words, during paper P is by fixing clamp-press part N2, it is controlled
The temperature difference limitation control of each several part so that the temperature difference of the fixing band 75 and backer roll 71 of fixing clamp-press part N2 positions is no more than
It is stored in the ceiling temperature difference TDlim in nonvolatile memory 5.As it was previously stated, ceiling temperature difference TDlim is fixing clamp-press part
N2 fixing band 75 and the maximum temperature difference allowed of backer roll 71, are that can be suppressed to paper P curling to have passed through at it
Will not occur the temperature of the degree of paperboard in conveying after fixing clamp-press part N2.Ceiling temperature difference TDlim can carry out reality in advance
Test etc. and obtain.
In the manner, first, before temperature difference limitation control is carried out, emulated in CPU4, to speculate paper P
Pass through the temperature difference of the fixing band 75 and backer roll 71 of the fixing clamp-press part N2 during being fixed clamp-press part N2.Same with Fig. 4, this is imitated
Very can be while according to paper P thickness and size, paper P transporting velocity, the degree of heat of heater 74 etc. and image
Form known information in relevant task and obtain time t1, t2, t3 and time Δ t while carrying out.Specifically, in image shape
Into exposure start before, obtain paper P by be fixed clamp-press part N2 during fixing band 75 and backer roll 71 in fixing clamp-press part
N2 respective temperature, and according to calculated temperature, temperature difference can be speculated.
Then, in the case where the temperature difference speculated exceedes ceiling temperature difference TDlim, while carrying out temperature difference limitation control
System is while carry out paper P fixing processing.In the temperature difference limitation control of the manner, in fixing clamp-press part N2 fixing band 75
Temperature difference with backer roll 71 stops the heating of heater 74 more than before ceiling temperature difference TDlim.On stopping adding
On the opportunity of the heating of thermal 74, it can be obtained in above-mentioned emulation using CPU4.For example, it is contemplated that than fixing band 75 in simulations
The opportunity for exceeding ceiling temperature difference TDlim with the temperature difference of backer roll 71 shifts to an earlier date the time set in advance, makes heater 74
Heating stops.Or, add the upper limit in the temperature of the backer roll 71 when paper P rear end reaches fixing clamp-press part N2 in simulations
Temperature difference TDlim.Further, it is contemplated that before the temperature of fixing band 75 reaches the opportunity for the temperature obtained by addition, making heating
The heating of device 74 stops.
In the figure 7, represent that the fixing band 75 that the temperature difference for carrying out the manner is limited when controlling is clamped fixing with heavy line
Temperature near portion N2.As shown in fig. 7, after paper P enters fixing clamp-press part N2, paper P rear end passes through fixing cramping
Before portion N2, limited and controlled by temperature difference, stop the heating of heater 74, thus, it is possible to during suppressing to make heating stopping
Fixing band 75 temperature rising.Also, the rear end of the paper P in the heating of heating-stopping apparatus 74 reaches fixing clamp
Temperature difference TD4 during portion N2 is represented in the figure 7.
As shown in fig. 7, temperature difference TD4 is suppressed to be less than limits control and not heating-stopping apparatus 74 without temperature difference
Heating when temperature difference TD3.Also, as shown in fig. 7, temperature difference TD4 is suppressed to be less than ceiling temperature difference TD1lim.Cause
This, in the manner, can make paper P rear end side carry out fixing processing serious curling does not occur.Thereby, it is possible to suppress
By being fixed in the conveying after clamp-press part N2 paperboard occurs for paper P.
Also, in the example of fig. 7, make the heater of stopping when paper P rear end has passed through fixing clamp-press part N2
74 heating restarts.Then, after the heating-up temperature for being fixed clamp-press part N2 reaches the fixing temperature T1 of normal mode, energy
Enough make lower a paper P by being fixed clamp-press part N2.That is, in the example in fig. 4, passing through in image A paper P fixing
Clamp-press part N2 and fixing clamp-press part N2 heating-up temperature are reached after the fixing temperature T1 of normal mode, can make image B paper
Open P and pass through fixing clamp-press part N2.
In addition, above-mentioned emulation and temperature difference limitation control only can be judged as the printing in the generation of print command
The fixing temperature of the image of instruction is carried out when being less than the fixing temperature of next image of the image.That is, intelligence is fixing
Next image identical situation and next figure of the fixing temperature of control in the related image of print command and the image
It can be controlled in the case that the fixing temperature of picture is low without emulation and temperature difference limitation.
In the manner, as described above, thus it is speculated that paper P passes through the fixing of the fixing clamp-press part N2 during being fixed clamp-press part N2
Temperature difference with 75 Yu backer roll 71, and temperature difference limitation control is carried out based on the temperature difference deduced.But, such as fixing
Them are detected in the structure of the temperature sensor for the temperature being fixed near clamp-press part N2 with being respectively equipped with 75 and backer roll 71,
The actual temperature of fixing band 75 and backer roll 71 is capable of detecting when during paper P is by being fixed clamp-press part N2.Also, energy
The actual temperature of fixing band 75 and backer roll 71 near enough fixing clamp-press part N2 detected according to this obtains actual temperature
Difference.
In order to detect temperature of the fixing band 75 near fixing clamp-press part N2, such as shown in Fig. 2 can use hollow
Part is represented as fixing roller 72, and in being set close to the position for being fixed clamp-press part N2 for the inner side of fixing roller 72 with double dot dash line
Temperature sensor 77.Also, can also be similarly in the hollow inner side of backer roll 71 close to fixing cramping to backer roll 71
Portion N2 position sets the temperature sensor 78 represented with double dot dash line.
Then, temperature difference is obtained using the difference of the detection temperature of temperature sensor 77,78, and heating can be controlled
The temperature difference limitation control of the heating of device 74, so that the temperature difference obtained is suppressed to be less than ceiling temperature difference TDlim.Tool
Say body, rise to the threshold value for being arranged on ceiling temperature difference below TDlim by temperature difference when being fixed clamp-press part N2 in paper P
When i.e. heating stops temperature difference, stop the heating of heater 74.In this case, it is not necessary to carry out supposition temperature difference
Emulation.It should be noted that scrupulously saying, the detection temperature of temperature sensor 77,78 is all fixing with fixing clamp-press part N2
Actual temperature with 75 actual temperature and backer roll 71 is slightly different.It therefore, it can the detection to temperature sensor 77,78
Temperature be modified after temperature as fixing clamp-press part N2 fixing band 75 temperature and the temperature of backer roll 71.
Further, since making the heating of heater 74 temporarily stop during image A paper P is by fixing clamp-press part N2
Only, so how much needing some times in the fixing temperature T1 for reaching normal mode.But, because the heating of heater 74 stops
Only the time is not so long, so the production efficiency of image formation will not be greatly reduced.In other words, it can either remain high
The production efficiency of image formation, can suppress paper P curling again.
In addition, being carried out during the image formation in first face of the temperature difference limitation control preferably in duplex printing.As it was previously stated,
In duplex printing, by progress positive and negative upset after the paper P after fixing clamp-press part N2 to two-sided carrying path 60
Conveying.By overturning its positive and negative when carrying out the image formation in paper P the second face, the figure in its front-end and back-end and the first face
It is opposite during as being formed.That is, one end as rear end is overturning positive and negative when carrying out the image formation in paper P the first face
Turn into front end during the image formation for carrying out the second face afterwards.
When serious curling occurs for paper P front, its front end may be prevented from for example, by along two-sided carrying path
The clamp-press part of the conveying roller of 60 configurations.Therefore, the curling of rear end side is serious during the image formation in the first face for carrying out paper P, this
It is likely to result in occurring paperboard when carrying out the image formation in the second face after positive and negative is overturn.However, in duplex printing, utilizing
Temperature difference limitation control, the curling of rear end side when suppressing the image formation for carrying out the first face, so as to not occurring paperboard
The image for carrying out having overturn the paper P of positive and negative the second face well is formed.
On the other hand, the second face is carried out after being formed when only carrying out the image formation in the first face and in the image in the first face
Image formation when, even in fixing clamp-press part N2, the rear end side of paper P conveying direction is crimped, the conveying after
The middle frequency for occurring paperboard also will not be so high.It should be noted that when only carrying out the image formation in the first face and the
Image simultaneously carries out the image formation in the second face after being formed when, temperature difference limitation control can also be carried out.Because can
Suppress paper P curlings this point not change.In other words, this is due to the paper that can carry out completing image formation well
Stackings of the P in paper delivery portion 55, and be because high-quality dress can be carried out using the multipage paper P for completing image formation
Order.
In addition, ceiling temperature difference TDlim is preferably for example with the difference of used paper P species in image formation
And different values.For example, thicker paper P its rigidity of thickness is stronger, the easier generation paperboard in the case where crimping.Cause
This, the paper P thicker to thickness more wishes to reduce curling.Table 1 represents the energy in image processing system 1 according to paper P species
It is enough that paper P curling is suppressed to the ceiling temperature difference TDlim for not occurring paperboard degree in conveying.
As shown in table 1, the thick paper P of thickness, preferably uses low value and suppresses to roll up as ceiling temperature difference TDlim
It is bent.It should be noted that an example of the following table 1 for the image processing system 1 of the manner, such as according to different images
Forming apparatus, can use the value of different temperature differences as ceiling temperature difference TDlim.
[table 1]
| The species of paper | Ceiling temperature difference TDlim [DEG C] |
| Thin paper | 60 |
| Common paper | 50 |
| Ground paper 1 | 40 |
| Ground paper 2 | 38 |
| Ground paper 3 | 36 |
| Ground paper 4 | 34 |
| Envelope | 45 |
In addition, the ceiling temperature difference TDlim shown in above-mentioned table 1 can pass through bar during fixing clamp-press part N2 using paper P
Part is modified.Because paper P rear end reaches the temperature difference of the fixing band 75 and backer roll 71 when being fixed clamp-press part N2
Different values is turned into by the condition difference being fixed during clamp-press part N2 according to paper P.For example, paper P rear end reaches fixed
Length of the temperature difference of fixing band 75 during shadow clamp-press part N2 and backer roll 71 on paper P conveying direction is more short more turns into
Small value.Because the length on paper P conveying direction is shorter, the heat that backer roll 71 is captured by whole paper P is fewer.
Therefore, as paper P, it using the short paper of the length on its conveying direction, can be modified to ceiling temperature difference TDlim
It is lower.Table 2 represents example of the length on the conveying direction according to paper P to the ceiling temperature difference TDlim correction values being modified
Son.
[table 2]
| Length [mm] of the paper in conveying direction | Ceiling temperature difference Tdlim correction value [DEG C] |
| ＞ 420 | +4 |
| ＞ 364 | +2 |
| ＞ 297 | 0 |
| 210≥ | - 2 |
Also, the temperature difference of the fixing band 75 when paper P rear end reaches fixing clamp-press part N2 and backer roll 71 is in the paper
P is opened by the value more small when faster of speed when being fixed clamp-press part N2, and this is due to that paper P passes through when being fixed clamp-press part N2
When transporting velocity is faster, the heat that backer roll 71 is integrally taken away by paper P is fewer.Therefore, when paper P transporting velocity is faster,
Ceiling temperature difference TDlim can be made to get over low land to be modified.Table 3 represents transporting velocity according to paper P, poor to ceiling temperature
The example for the correction value that TDlim is modified.
[table 3]
| Paper sheet delivery speed [mm/s] | Ceiling temperature difference TDlim correction value [DEG C] |
| ＞ 310 | - 4 |
| ＞ 250 | - 2 |
| ＞ 168 | 0 |
| 136≥ | +2 |
In addition, the temperature difference of the fixing band 75 and backer roll 71 when paper P rear end reaches fixing clamp-press part N2 makes paper
The rate of climb of heating-up temperature during opening P by being fixed clamp-press part N2 is smaller when slower.Because paper P front end is arrived
The rear end of temperature and paper P up to the fixing band 75 during fixing clamp-press part N2 reaches the fixing band 75 when being fixed clamp-press part N2
The difference of temperature diminishes.In addition, the fixing temperature T1 of fixing temperature T2 and normal mode with low temperature mode poor smaller, paper
Fixing band 75 when P rear end the reaches fixing clamp-press part N2 tendency smaller with the temperature difference of backer roll 71.Therefore, to upper limit temperature
Spend difference TDlim, also can the rate of climb based on these fixing clamp-press part N2 paper P heating-up temperature, low temperature mode with leading to
The difference of the heating-up temperature of norm formula is modified.
The degree of paper P curlings is influenceed by the temperature and humidity of environment certainly.It therefore, it can in image processing system
The sensor of detection environment temperature and humidity is set in 1, and carries out ceiling temperature difference TDlim's using the detected value of the sensor
Amendment.Therefore, fixing folder is passed through beforehand through the length on the above-mentioned paper P species of the acquisition such as experiment and conveying direction, paper P
The conditions such as transporting velocity during splenium N2 and ceiling temperature difference TDlim relation, are stored the relation as the poor table of ceiling temperature
In nonvolatile memory 5.Then, when image is formed, as ceiling temperature difference TDlim, this is met using basis
The condition of image formation performs temperature difference limitation control with reference to the value that the poor table of ceiling temperature of nonvolatile memory 5 is determined
Can.
[second method]
Second method is illustrated.In the manner, structure of image processing system 1 etc. and above-mentioned first method phase
Together.In second method, the fixing control of intelligence is also carried out in the fixing processing of fixing processing unit 70.Thus, pass through in paper P
During fixing clamp-press part N2, the temperature difference of the fixing band 75 and backer roll 71 of fixing clamp-press part N2 positions increases sometimes.Therefore, lead to
It may cause the curling of paperboard degree seriously in conveying of the rear end side after for the paper P for having crossed fixing clamp-press part N2.
Therefore, in second method, also carry out for by the temperature of fixing clamp-press part N2 fixing band 75 and backer roll 71
Difference is suppressed to relatively low temperature difference limitation control, so that serious curling does not occur for the paper P for having passed through fixing clamp-press part N2.
In second method, the temperature difference limitation controls different from first method are carried out.In detail, the temperature difference limitation control of the manner
Carried out by the rate of climb of the fixing clamp-press part N2 of adjustment paper P heating-up temperature.
In the manner, first, in CPU4, the information based on the task before image formation task is performed, by imitative
It is true to speculate that paper P passes through the fixing band 75 of the fixing clamp-press part N2 during being fixed clamp-press part N2 and the temperature difference of backer roll 71.So
Afterwards, in the case where the temperature difference speculated exceedes ceiling temperature difference TDlim, while temperature difference limitation control is carried out, while entering
Row paper P fixing processing.In the temperature difference limitation control of the manner, while the heating of limitation heater 74, while making
Fixing clamp-press part N2 paper P heating-up temperature rises.
Control is limited using Fig. 8 temperature differences for describing the manner in detail.In fig. 8, also illustrate that the i.e. image A's of black white image
Paper P and coloured image are the temperature of the fixing processing unit 70 when image B paper P passes sequentially through fixing clamp-press part N2.In Fig. 8
In, when limiting control for carrying out the temperature difference of second method, represent that fixing band 75 is attached in fixing clamp-press part N2 with solid line
Near temperature, is represented by dotted lines temperature of the backer roll 71 near fixing clamp-press part N2.
Also, the fixing band 75 when representing to limit control without temperature difference with double dot dash line is near fixing clamp-press part N2
Temperature.Temperature of the fixing band 75 represented with double dot dash line near fixing clamp-press part N2 is not limit adding for heater 74
It is fixed that paper P that is hot and making fixing clamp-press part N2 heating-up temperature is risen to most short heating-up time t3 (Fig. 4) from fixing temperature T2
Temperature during shadow temperature T1, that is to say, that temperature of the fixing band 75 represented with double dot dash line near fixing clamp-press part 75 be
Temperature based on emulation.
In the manner, when beginning to pass through time Δ t from image A exposure, warm mode transfer formula is also switched from low temperature mode
To normal mode.This is due to that the i.e. image A of black white image next image B is coloured image.Also, by by warm mode transfer formula
Normal mode is switched to from low temperature mode, during image A paper P is by fixing clamp-press part N2, fixing band 75 is fixed
Temperature near shadow clamp-press part N2 rises.
Moreover, in the manner, as shown in figure 8, the fixing band 75 when having carried out temperature difference limitation control is in fixing cramping
Temperature near portion N2, compared with representing with double dot dash line without temperature when carrying out temperature difference limitation control slowly on
Rise.This be due to by temperature difference limit control, with emulation when compared with, limit the heating of heater 74.
Therefore, by the fixing band 75 and backer roll 71 near fixing clamp-press part N2 when having carried out temperature difference limitation control
Temperature difference TD5 is suppressed to lower than without the temperature difference TD3 carried out when temperature difference limitation is controlled.Also, as shown in figure 8, temperature difference
TD5 is suppressed to be less than ceiling temperature difference TDlim.Therefore, in the manner, paper P rear end side can also do not occurred sternly
Carry out to the curling of weight fixing processing.Block thereby, it is possible to suppress the paper P passed through after fixing clamp-press part N2 in conveying
Paper.
[Third Way]
Third Way is illustrated.In the manner, structure of image processing system 1 etc. is also identical with aforesaid way.
In Third Way, the fixing control of intelligence is also carried out in the fixing processing of fixing processing unit 70.Thus, it is fixed to pass through in paper P
During shadow clamp-press part N2, the temperature difference of the fixing band 75 and backer roll 71 of fixing clamp-press part N2 positions increases sometimes.Therefore, pass through
Fixing clamp-press part N2 paper P rear end side may cause the curling of paperboard degree seriously in the conveying after.
Therefore, in Third Way, carry out for by the temperature difference of fixing clamp-press part N2 fixing band 75 and backer roll 71
Relatively low temperature difference limitation control is suppressed to, so that serious curling does not occur for the paper P for having passed through fixing clamp-press part N2.
In three modes, the temperature difference limitation controls different from aforesaid way are carried out.In detail, control is limited in the temperature difference of the manner
In, make the opportunity switched from low temperature mode to normal mode earlier than aforesaid way.
In the manner, first, in CPU4, before image formation task is performed, the information based on the task, by imitative
It is true to speculate that paper P passes through the fixing band 75 of the fixing clamp-press part N2 during being fixed clamp-press part N2 and the temperature difference of backer roll 71.
In the case that the temperature difference speculated exceedes ceiling temperature difference TDlim, while temperature difference limitation control is carried out, while carrying out paper
P fixing processing.The temperature difference of the manner limits control while shifting to an earlier date the opportunity switched from low temperature mode to normal mode, and one
While rising fixing clamp-press part N2 paper P heating-up temperature.
Control is limited using Fig. 9 temperature differences for explaining the manner.In fig .9, black white image i.e. image A is also illustrated that
Paper P and coloured image be the fixing processing unit 70 when image B paper P passes sequentially through fixing clamp-press part N2 temperature.
In Fig. 9, when limiting control for carrying out the temperature difference of Third Way, represent fixing band 75 in fixing clamp-press part N2 with solid line
Neighbouring temperature, is represented by dotted lines temperature of the backer roll 71 near fixing clamp-press part N2.
Also, as shown in figure 9, in Third Way, when beginning to pass through time Δ t1 from image A exposure, temperature is adjusted
Pattern is switched to normal mode from low temperature mode.In other words, in the manner, when Billy is shifted to an earlier date with the time Δ t illustrated by Fig. 4
Between α warm mode transfer formula is switched to normal mode from low temperature mode.Time α can be set as not enough time Δ t time.Time Δ
T is the switching time for emulating middle temperature mode transfer formula.
In other words, in the temperature difference limitation control of the manner, warm mode transfer formula is made to switch to normal mode from low temperature mode
Opportunity earlier than the opportunity in emulation.Thus, compared with aforesaid way, fixing band 75 can be made in fixing clamp-press part N2 temperature
Fixing temperature T1 is risen in advance.Therefore, it is possible to make image A next image B paper P with the opportunity earlier than aforesaid way
By being fixed clamp-press part N2.
By the way that warm mode transfer formula is switched into normal mode from low temperature mode, fixing clamp-press part N2 is passed through in image A paper P
During, temperature of the fixing band 75 near fixing clamp-press part N2 rises.As shown in figure 9, the temperature difference in the manner is limited
In control, paper P enters after fixing clamp-press part N2, stops heating dress before paper P rear end is by fixing clamp-press part N2
Put 74 heating.On the stopping of the heating of the heater 74, the explanation phase with Fig. 7 progress using above-mentioned first method
Together, i.e., by temporarily ceasing the heating of heater 74, paper P rear end is reached to temperature difference during fixing clamp-press part N2
TD6 is suppressed to TDlim poor less than ceiling temperature.It is fixed serious curling does not occur thereby, it is possible to paper P rear end side
Processing, occurs paperboard so as to suppress the paper P passed through after fixing clamp-press part N2 in conveying.
Therefore, can be by the fixing band 75 near fixing clamp-press part N2 with adding in the temperature difference limitation control of the manner
The temperature difference TD6 of pressure roller 71 is suppressed to TDlim poor less than ceiling temperature, and improves the production efficiency of image formation.Above-mentioned
In explanation, the heating of heater 74 is set to temporarily cease (Fig. 7) in the same manner as first method, so that temperature difference TD6 be suppressed to
TDlim poor less than ceiling temperature.But it is also possible to second method likewise by the heating (Fig. 8) for limiting heater 74,
Temperature difference TD6 is suppressed to TDlim poor less than ceiling temperature.
[fourth way]
Fourth way is illustrated.In the manner, structure of image processing system 1 etc. is identical with aforesaid way.
In fourth way, the fixing control of intelligence is also carried out in the fixing processing of fixing processing unit 70.Thus, pass through in paper P fixing
During clamp-press part N2, the temperature difference of the fixing band 75 and backer roll 71 of fixing clamp-press part N2 positions increases sometimes.Therefore, pass through
Fixing clamp-press part N2 paper P rear end side may cause the curling of paperboard degree seriously in the conveying after.
Therefore, in fourth way, carry out for by the temperature difference of fixing clamp-press part N2 fixing band 75 and backer roll 71
Relatively low temperature difference limitation control is suppressed to, so that serious curling does not occur for the paper P for having passed through fixing clamp-press part N2.
In four modes, the temperature difference limitation controls different from aforesaid way are carried out.In detail, the temperature difference limitation control of the manner is logical
Adjustment paper P transporting velocity is crossed to carry out.
In the manner, first, in CPU4, before image formation task is performed, the information based on the task, by imitative
It is true to speculate that paper P passes through the fixing band 75 of the fixing clamp-press part N2 during being fixed clamp-press part N2 and the temperature difference of backer roll 71.
In the case that the temperature difference speculated exceedes ceiling temperature difference TDlim, while temperature difference limitation control is carried out, while carrying out paper
P fixing processing.In the temperature difference limitation control of the manner, the transporting velocity for making paper P reach before fixing clamp-press part N2 is slow
In common transporting velocity.
Control is limited using Figure 10 temperature differences for explaining the manner.In Fig. 10, black white image i.e. figure is also illustrated that
The temperature of fixing processing unit 70 when passing sequentially through fixing clamp-press part N2 as paper P that A paper P and coloured image are image B,
And temperature of the fixing band 75 near fixing clamp-press part N2 is represented with solid line, backer roll 71 is represented by dotted lines in fixing clamp-press part
Temperature near N2.
Also, as shown in Figure 10, in fourth way, image A front end be later than by using Fig. 4 illustrate from image A
Exposure start to reach fixing clamp-press part N2 when reaching fixing clamp-press part N2 time t1 to image A front end.Time t1 is imitative
Reach fixing clamp-press part N2 time in very to image A front end since image A exposure.That is, making image A paper
Open the opportunity that P is later than by fixing clamp-press part N2 opportunity in emulation.
Specifically, in fourth way, image A paper P rear end by fixing clamp-press part N2 before, make to be fixed
Temperature with 75 near fixing clamp-press part N2 reaches fixing temperature T1.Pass through the fixing clamp-press part N2 phases in image A paper P
Between, the temperature for the fixing band 75 for reaching fixing temperature T1 is no longer increased, so that the temperature difference of fixing band 75 and backer roll 71
TD7 is smaller.Thus, temperature difference TD7 can be suppressed to TDlim poor less than ceiling temperature in the manner.
During due to making image A paper be later than by being fixed clamp-press part N2 opportunity by time t1 in emulation, therefore
In the manner, the transporting velocity for making paper P reach fixing clamp-press part N2 is slower than speed during emulation.Specifically, in image A
Paper P front end reach secondary transfer printing clamp-press part N1 before, or after rear end is by secondary transfer printing clamp-press part N1 front end is arrived
Up to before fixing clamp-press part N2, image A paper P transporting velocity is switched to the conveying speed of transporting velocity when being slower than emulation
Degree.This is due to that, in the case where making transporting velocity slack-off during paper P is by secondary transfer printing clamp-press part N1, may turn
Print in the image A on paper P and produce noise.I.e. it is capable to suitably carry out image A on one side to secondary transfer printing clamp-press part
The transfer of paper P in N1, while temperature difference TD7 is suppressed into TDlim poor less than ceiling temperature.Therefore, in the manner, no
The quality of formed image can be only ensured higher, and can be mitigated paper P curling and be suppressed to have passed through fixing folder
Paperboard occurs in conveying for the paper P after splenium N2.It should be noted that can also the paper P for making image A transporting velocity
After transporting velocity when being temporarily slower than emulation, reached in paper P front end before fixing clamp-press part N2, recover transporting velocity
To transporting velocity during emulation.Or, can also before image A paper P front end is reached secondary transfer printing clamp-press part N1,
Or by secondary transfer printing clamp-press part N1, front end is reached before being fixed clamp-press part N2 for rear end, temporarily ceases paper P conveying.
[the 5th mode]
5th mode is illustrated.In the manner, structure of image processing system 1 etc. is identical with aforesaid way.
In 5th mode, the fixing control of intelligence is also carried out in the fixing processing of fixing processing unit 70.Thus, pass through in paper P fixing
During clamp-press part N2, the temperature difference of the fixing band 75 and backer roll 71 of fixing clamp-press part N2 positions increases sometimes.Therefore, pass through
Fixing clamp-press part N2 paper P rear end side may cause the curling of paperboard degree seriously in the conveying after.
Therefore, in the 5th mode, also carry out for by the temperature of fixing clamp-press part N2 fixing band 75 and backer roll 71
Difference is suppressed to relatively low temperature difference limitation control, so that serious curling does not occur for the paper P for having passed through fixing clamp-press part N2.
In 5th mode, the temperature difference limitation controls different from aforesaid way are carried out.In detail, the temperature difference limitation control of the manner
Carried out by making the opportunity that low temperature mode switches to normal mode be later than aforesaid way.
In the manner, first, in CPU4, before image formation task is performed, the information based on the task, by imitative
It is true to speculate that paper P passes through the fixing band 75 of the fixing clamp-press part N2 during being fixed clamp-press part N2 and the temperature difference of backer roll 71.
In the case that the temperature difference speculated exceedes ceiling temperature difference TDlim, while temperature difference limitation control is carried out, while carrying out paper
P fixing processing.The temperature difference limitation control of the manner by opportunity from low temperature mode to normal mode that make to switch from postpone come
Carry out.
Control is limited using Figure 11 temperature differences for explaining the manner.In fig. 11, black white image i.e. figure is also illustrated that
The temperature of fixing processing unit 70 when passing sequentially through fixing clamp-press part N2 as paper P that A paper P and coloured image are image B,
And temperature of the fixing band 75 near fixing clamp-press part N2 is represented with solid line, backer roll 71 is represented by dotted lines in fixing clamp-press part
Temperature near N2.
Also, as shown in figure 11, in the 5th mode, when beginning to pass through time Δ t2 from image A exposure, by temperature tune
Pattern is switched to normal mode from low temperature mode.That is, in the manner, Δ t delay time time that Billy is illustrated with Fig. 4
Warm mode transfer formula is switched to normal mode by β from low temperature mode.Time Δ t is the switching time of the warm mode transfer formula in emulation.That is, exist
In the temperature difference limitation control of the manner, the opportunity for making warm mode transfer formula switch from low temperature mode to normal mode is later than in emulation
Opportunity.
Also, as shown in figure 11, in the 5th mode, during image A paper P is by fixing clamp-press part N2, temperature is adjusted
Pattern is low temperature mode.Therefore, during image A paper P is by fixing clamp-press part N2, fixing band 75 is in fixing cramping
Temperature near portion N2 is maintained certain with fixing temperature T2.
Fixing temperature is maintained by making image A paper P by the temperature of the fixing band 75 during being fixed clamp-press part N2
T2, the temperature difference TD8 for being fixed clamp-press part N2 fixing band 75 and backer roll 71 is smaller.Therefore, in the manner, temperature difference TD8
It is suppressed to be less than ceiling temperature difference TDlim.Also, image A paper P rear end by fixing clamp-press part N2 after, pass through
Normal mode is switched to, the temperature of fixing band 75 is risen to fixing temperature T1.It should be noted that the switching of warm mode transfer formula can
To be carried out before fixing clamp-press part N2 is reached in image A paper P rear end.In this case, with temperature difference TD8 no more than upper
Limit temperature difference TDlim is that condition obtains time Δ t2.
[the 6th mode]
6th mode is illustrated.In the manner, structure of image processing system 1 etc. is also identical with aforesaid way.
In the 6th mode, the fixing control of intelligence is also carried out in the fixing processing of fixing processing unit 70.Thus, it is fixed to pass through in paper P
During shadow clamp-press part N2, the fixing clamp-press part N2 fixing band 75 of position increases sometimes with the temperature difference of backer roll 71.Therefore, lead to
It may cause the curling of paperboard degree seriously in conveying of the rear end side after for the paper P for having crossed fixing clamp-press part N2.
Therefore, in the 6th mode, also carry out for by the temperature of fixing clamp-press part N2 fixing band 75 and backer roll 71
Degree difference is suppressed to relatively low temperature difference limitation control, so that serious curling does not occur for the paper P for having passed through fixing clamp-press part N2.
It is different from aforesaid way in the 6th mode, the formation order of image when being formed continuously multiple images is switched while entering
Trip temperature difference limitation control.
In the manner, illustrate image A as shown in Figure 4, image B, the situation of tri- image formation of image C.In we
In formula, similarly image A and image C are that black white image, image B are coloured image.Therefore, it is right by the fixing control of intelligence
Image A and image C paper P carries out fixing processing with the fixing temperature T2 of low temperature mode, to image B paper P with usual mould
The fixing temperature T1 of formula carries out fixing processing.
In this case, as shown in figure 4, generally also sending print command according to image A, image B, image C order.
That is, under normal conditions, forming image A on paper P1 the first face, two-sided carrying path 60 being passed through in paper P1
Period, image B is formed on paper P the first face, after image B is formed, image C is formed on paper P1 the second face.
But, in the manner, the image before the image of the print command is further contemplated during the print command for generating image
Relevant temperature adjusts pattern information.Next, it is determined whether switching next figure of the image and the image that send generation print command
The order of the print command of picture is formed to carry out image.
In this regard, the situation during generation of explanation image B print command.First, in the feelings for the print command for generating image B
Under condition, whether the fixing temperature under the warm mode transfer formula of the image C after image A and image B before judging image B below schemes
Fixing temperature under picture B warm mode transfer formula.The situation of image B fixing temperature is below in image A and image C fixing temperature
Under, whether judge image B is the image to be formed on paper P the first face.Further, if image B is in paper P
The image to be formed on first face, then judge image C whether be to the paper P for foring image on the first face second
The face image to be formed.Then, if image C is the second face image to be formed to paper P, image B and image C are switched
Order, after image C is formed, carry out image B formation.Then, in image C fixing processing, due to image B temperature
The fixing temperature under warm mode transfer formula of the fixing temperature higher than image C under mode transfer formula, therefore carry out temperature difference limitation control.
Then, using Figure 12, specifically describe formed respectively on same paper P the first face and the second face image A and
Image C, the situation for forming on the paper P different from image A and image C the first face image B.Here, with formed image A and
Image C paper P is paper P1.That is, image A is formed on paper P1 the first face, on paper P1 the second face
Form image C.Image B is formed on the paper P2 different from paper P1 the first face.
Firstly, for image A, beaten due to being the image originally formed, therefore according to the generation of image A and image B information
Print instruction.In image A print command, image B is normal mode, and image A is low temperature mode.Therefore, as shown in figure 12, exist
When beginning to pass through time Δ t from image A exposure, warm mode transfer formula is switched to normal mode from low temperature mode.Then, in the first face
On when carrying image A paper P1 by fixing clamp-press part N2, enter to exercise heating dress in the same manner as Fig. 7 of above-mentioned first method
Put the temperature difference limitation control that 74 heating stops.Therefore, image A paper P1 rear end is carried on the first face fixing
Clamp-press part N2 fixing band 75 is suppressed to TDlim poor less than ceiling temperature with the temperature difference TD9 of backer roll 71.Pass through fixing cramping
Portion N2 and form image A paper P1 on the first face after positive and negative upset, conveyed to two-sided carrying path 60.Also,
Image A paper P1 is formd on the first face by being fixed after clamp-press part N2, makes the heating of heater 74 stopped
Restart.
Then, image B print command is generated according to image A, image B, image C information.Here, because image B it
The warm mode transfer formula of image C after preceding image A and image B is all low temperature mode, therefore the fixing temperature of these images is all
Than the low fixing temperature T2 of fixing temperature T1 that normal mode is image B.In addition, image B be will to paper P2 the first face shape
Into image.In addition, image C is to be formed to the paper P1 for the formation for having carried out image A on the first face the second face
Image.Therefore, it is judged as switching image B and image C order, image C is formed before image B.
Then, in image C print command, the image B after sequentially being switched is normal mode, and its fixing temperature T1 is high
In the image C of low temperature mode fixing temperature T2.Therefore, as shown in figure 12, the paper P1 that image C is carried on the second surface leads to
When crossing fixing clamp-press part N2, enter to exercise the temperature difference that the heating of heater 74 stops in the same manner as Fig. 7 of above-mentioned first method
Limitation control.Therefore, the rear end that image C paper P1 is carried on the second surface is being fixed clamp-press part N2 fixing band 75 with adding
The temperature difference TD10 of pressure roller 71 is suppressed to be less than ceiling temperature difference TDlim.Also, form image C paper in the second face
After P1 is by fixing clamp-press part N2, restart the heating of the heater 74 stopped.Then, in fixing clamp-press part N2
Fixing band 75 reach after the fixing temperature T1 of normal mode, make to carry on the first face image B paper P2 pass through it is fixing
Clamp-press part N2.
Therefore, in the manner, the curling for the paper P1 that image A and image C is formed on two-sided can be reduced and suppressed
The generation of paperboard, and image B can be carried out well to the fixing processing in paper P2 the first face.It should be noted that
In the manner, to switching the formation order of image and the feelings that temperature difference limitation is controlled being carried out in the same manner as first method (Fig. 7)
Condition is illustrated.It is however not limited to first method, can also carry out with it is any in the second to the 5th mode (Fig. 8~Figure 11)
The same temperature difference limitation control of mode.
As illustrated in detail above, the fixing control of intelligence is carried out in the image processing system 1 of aforesaid way
System.Also, while the fixing control of intelligence is carried out, while performing the temperature difference limitation control for carrying out image formation so that paper P leads to
Fixing clamp-press part N2 fixing band 75 and the temperature difference of backer roll 71 during crossing fixing clamp-press part N2 is poor no more than ceiling temperature
TDlim.Thus, the power consumption in fixing processing is reduced, and the generation of curling can be suppressed.
The expression of explanation is needed, present embodiment is to illustrate, rather than limitation of the present invention.Therefore, the present invention is aobvious
Various improvement, deformation can be so carried out in the range of its purport is not departed from.For example, the invention is not restricted to color printer,
It is applicable to duplicator etc..Also, for example image processing system 1 can also be illustrated by the above-mentioned first to the 5th mode not
It is excellent from the viewpoint of the production efficiency and the power consumption of fixing processing unit 70 that are formed from image in same temperature difference limitation control
Select temperature difference limitation control and carry out.Also, for example in intelligently fixing control, warm mode transfer formula is not limited to normal mode and low temperature
Pattern, can also set the high pattern of fixing temperature and the low mould of fixing temperature compared with low temperature mode compared with normal mode
Formula.
Claims (14)
1. a kind of image processing system, has：
Image forming part, it forms toner image, by the way that the toner image is transferred on sheet material, toner is formed on sheet material
Picture；
Fixing processing unit, it has the heating part for the heating for receiving thermal source and is collectively forming adding for clamp-press part with the heating part
Splenium, makes to carry out fixing processing by the clamp-press part transferred with the sheet material of toner image；
Apparatus control portion, each several part of its control device and carry out image and formed；
The image processing system is characterised by having：
Heated side temperature output section, it exports the heated side temperature of the temperature for the position in the clamp-press part for representing the heating part
Angle value；
Pressure side temperature output section, it exports the pressure side temperature of the temperature for the position in the clamp-press part for representing the pressurization part
Angle value；
When the fixing required heat for the toner image being transferred to using described image forming portion on sheet material is few, needed for fixing
Heat multidate ratio, described device control unit is by target of the sheet material by the heated side temperature value during clamp-press part
Fixing temperature is set as relatively low；
Described device control unit is controlled the fixing control of intelligence of the heating of the thermal source so that reach described clamp in sheet material
The heated side temperature value turns into the temperature more than fixing temperature set to the sheet material before portion；
Also, the second sheet material after the first sheet material and the first sheet material for continuing through the clamp-press part, in the second sheet material
Fixing temperature be higher than the first sheet material fixing temperature when, described device control unit perform to be formed image temperature difference limitation control
System so that the first sheet material is temperature by the difference of the heated side temperature value during clamp-press part and the pressure side temperature value
Difference is poor no more than ceiling temperature set in advance.
2. image processing system as claimed in claim 1, it is characterised in that
The heated side temperature output section is the sensor of the temperature for the position in the clamp-press part for detecting the heating part；
The pressure side temperature output section is the sensor of the temperature for the position in the clamp-press part for detecting the pressurization part；
Described device control unit reaches in the temperature difference in temperature difference limitation control and is redefined for the upper limit temperature
When the heating of value below degree difference stops temperature difference, stop the heating of the thermal source.
3. image processing system as claimed in claim 1 or 2, it is characterised in that have：
Turning part, it overturns the positive and negative for the sheet material for being formed with image on the first face by the clamp-press part；
Two-sided carrying path, it will pass through turning part to be to form image on the second face at the back side in first face
Sheet material be again fed to position than described image forming portion close to upstream；
Carry out implementing fixing to the first face in the duplex printing of image formation successively on the first face of the first sheet material and the second face
During processing, described device control unit carries out the temperature difference limitation control.
4. image processing system as claimed in claim 1 or 2, it is characterised in that have：
Turning part, it overturns the positive and negative for the sheet material for being formed with image on the first face by the clamp-press part；
Two-sided carrying path, it will pass through turning part to be to form image on the second face at the back side in first face
Sheet material be again fed to position than described image forming portion close to upstream；
Described device control unit is less than the fixing temperature of the first sheet material in the fixing temperature of the second sheet material, and before the first sheet material
It is less than the fixing temperature of the first sheet material by the fixing temperature of the sheet material of the clamp-press part, and the first sheet material is in its first face
The upper sheet material for forming image, the second sheet material are the sheet material for forming image on a second side by the two-sided carrying path
When,
The image that the second sheet material is carried out before the image formation of the first sheet material is formed, and in the image formation of the second sheet material
Perform the temperature difference limitation control.
5. image processing system as claimed in claim 1 or 2, it is characterised in that
With storage part, the storage part stores the thickness of the first sheet material, the first sheet material length in the conveying direction, the first sheet material
Relation by least one condition in the speed during clamp-press part and ceiling temperature difference is the poor table of ceiling temperature；
Described device control unit in temperature difference limitation control, using the value determined with reference to the poor table of the ceiling temperature as
The ceiling temperature is poor.
6. a kind of image processing system, has：
Image forming part, it forms toner image, by the way that the toner image is transferred on sheet material, toner is formed on sheet material
Picture；
Fixing processing unit, it has the heating part for the heating for receiving thermal source and is collectively forming adding for clamp-press part with the heating part
Splenium, makes to carry out fixing processing by the clamp-press part transferred with the sheet material of toner image；
Apparatus control portion, each several part of its control device and carry out image and formed；
The image processing system is characterised by having：
When the fixing required heat for the toner image being transferred to using described image forming portion on sheet material is few, needed for fixing
Heat multidate ratio, described device control unit is by sheet material by the heating part during clamp-press part in the clamp-press part
The target of the heated side temperature value of position is that fixing temperature is set as relatively low；
Described device control unit is controlled the fixing control of intelligence of the heating of the thermal source so that reach described clamp in sheet material
The heated side temperature value turns into the temperature more than fixing temperature set to the sheet material before portion；
Also, the second sheet material after the first sheet material and the first sheet material for continuing through the clamp-press part, in the second sheet material
Fixing temperature be higher than the first sheet material fixing temperature when, described device control unit perform to be formed image temperature difference limitation control
System so that the first sheet material is by the heated side temperature value during clamp-press part and the pressurization part in the position of the clamp-press part
The difference i.e. temperature difference for the pressure side temperature value put is poor no more than ceiling temperature set in advance；
Described device control unit makes to one side before the toner image of the first sheet material is initially formed using described image forming portion
One sheet material is by the clamp-press part while being heated using the thermal source and the heated side temperature value is risen to second
The heated side temperature value and the pressure side temperature value during fixing temperature of material are emulated；
Based on the heated side temperature value and the pressure side temperature value obtained is emulated by described, obtain after the first sheet material
The guess value of temperature difference when end reaches the clamp-press part speculates temperature difference；
In the case where the supposition temperature difference obtained exceedes ceiling temperature difference, determine to perform the temperature difference limitation control
System；
In the case where determining to perform the temperature difference limitation control, the temperature difference is performed when forming the image of the first sheet material
Limitation control.
7. image processing system as claimed in claim 6, it is characterised in that
Described device control unit in the emulation based on calculated the heated side temperature value and the pressure side temperature value,
Obtain the first sheet material by the temperature difference during the clamp-press part exceed the ceiling temperature difference opportunity i.e. more than when
Machine；
In temperature difference limitation control, the thermal source is stopped before opportunity is exceeded described in being obtained by the emulation
Heating；
After having passed through the clamp-press part in the rear end of the first sheet material, restart the heating of the thermal source stopped.
8. image processing system as claimed in claim 6, it is characterised in that
Described device control unit limits the heating of the thermal source in the temperature difference limits control so that the heated side temperature
The rising degree being worth in temperature difference limitation control is slower than the rising degree in the emulation.
9. image processing system as claimed in claim 6, it is characterised in that
Described device control unit in temperature difference limitation control, the front end of the first sheet material reach before described image forming portion with
And first the rear end of sheet material pass through the front end of the first sheet material after described image forming portion and reach during the clamp-press part at least
The transporting velocity of the first sheet material of one side is slower than the transporting velocity of the first sheet material in the emulation.
10. image processing system as claimed in claim 6, it is characterised in that
Described device control unit makes to make the heated side temperature using the heating of the thermal source in temperature difference limitation control
The rising that the rising beginning opportunity that value is begun to ramp up is later than in the emulation starts opportunity.
11. image processing system as claimed in claim 7 or 8, it is characterised in that
Described device control unit makes to make the heated side temperature using the heating of the thermal source in temperature difference limitation control
The rising beginning opportunity that value is begun to ramp up starts opportunity earlier than the rising in the emulation.
12. the image processing system as any one of claim 6 to 10, it is characterised in that have：
Turning part, it overturns the positive and negative for the sheet material for being formed with image on the first face by the clamp-press part；
Two-sided carrying path, it will pass through turning part to be to form image on the second face at the back side in first face
Sheet material be again fed to position than described image forming portion close to upstream；
Carry out implementing fixing to the first face in the duplex printing of image formation successively on the first face of the first sheet material and the second face
During processing, described device control unit carries out the temperature difference limitation control.
13. the image processing system as any one of claim 6 to 10, it is characterised in that have：
Turning part, it overturns the positive and negative for the sheet material for being formed with image on the first face by the clamp-press part；
Two-sided carrying path, it will pass through turning part to be to form image on the second face at the back side in first face
Sheet material be again fed to position than described image forming portion close to upstream；
Described device control unit is less than the fixing temperature of the first sheet material in the fixing temperature of the second sheet material, and before the first sheet material
It is less than the fixing temperature of the first sheet material by the fixing temperature of the sheet material of the clamp-press part, and the first sheet material is in its first face
The upper sheet material for forming image, the second sheet material are the sheet material for forming image on a second side by the two-sided carrying path
When,
The image that the second sheet material is carried out before the image formation of the first sheet material is formed, and in the image formation of the second sheet material
Perform the temperature difference limitation control.
14. the image processing system as any one of claim 6 to 10, it is characterised in that
With storage part, the storage part stores the thickness of the first sheet material, the first sheet material length in the conveying direction, the first sheet material
Relation by least one condition in the speed during clamp-press part and ceiling temperature difference is the poor table of ceiling temperature；
Described device control unit in temperature difference limitation control, using the value determined with reference to the poor table of the ceiling temperature as
The ceiling temperature is poor.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2014057342A JP6015697B2 (en) | 2014-03-20 | 2014-03-20 | Image forming apparatus |
| JP2014-057342 | 2014-03-20 |
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|---|---|
| CN104932235A CN104932235A (en) | 2015-09-23 |
| CN104932235B true CN104932235B (en) | 2017-08-29 |
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| US10274877B2 (en) * | 2016-09-29 | 2019-04-30 | Canon Finetech Nisca Inc. | Fixing device having a control portion that controls a heating temperature of a heating unit in a halt state according to a heating temperature of the heating unit in a rotating state |
| JP6911493B2 (en) * | 2017-04-28 | 2021-07-28 | 株式会社リコー | Image forming device |
Citations (4)
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|---|---|---|---|---|
| JP2003345164A (en) * | 2002-05-24 | 2003-12-03 | Sharp Corp | Fixing device and image forming apparatus |
| CN1637658A (en) * | 2004-01-09 | 2005-07-13 | 夏普株式会社 | Image forming apparatus and method for controlling fixing mechanism portion |
| CN1661494A (en) * | 2004-02-16 | 2005-08-31 | 株式会社理光 | Fixing device, and image forming apparatus using the fixing device |
| CN103853015A (en) * | 2012-11-28 | 2014-06-11 | 柯尼卡美能达株式会社 | Image forming apparatus and method of forming image |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3492089B2 (en) * | 1996-06-20 | 2004-02-03 | キヤノン株式会社 | Image forming device |
| JP2011039402A (en) * | 2009-08-17 | 2011-02-24 | Ricoh Co Ltd | Image processor |
| JP5514708B2 (en) * | 2010-12-14 | 2014-06-04 | 株式会社沖データ | Image forming apparatus |
| JP2013250392A (en) * | 2012-05-31 | 2013-12-12 | Oki Data Corp | Image forming apparatus and fixing device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003345164A (en) * | 2002-05-24 | 2003-12-03 | Sharp Corp | Fixing device and image forming apparatus |
| CN1637658A (en) * | 2004-01-09 | 2005-07-13 | 夏普株式会社 | Image forming apparatus and method for controlling fixing mechanism portion |
| CN1661494A (en) * | 2004-02-16 | 2005-08-31 | 株式会社理光 | Fixing device, and image forming apparatus using the fixing device |
| CN103853015A (en) * | 2012-11-28 | 2014-06-11 | 柯尼卡美能达株式会社 | Image forming apparatus and method of forming image |
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| Publication number | Publication date |
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| JP6015697B2 (en) | 2016-10-26 |
| JP2015179226A (en) | 2015-10-08 |
| CN104932235A (en) | 2015-09-23 |
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