JPH04159530A - Image recorder - Google Patents

Abstract

PURPOSE:To eliminate the possibility that the photosensitive agent surface of a photosensitive recording medium is damaged by adding tension in a pulling-back direction to the photosensitive recording medium on a side nearer to a feeding-in side than the tight contact position of the photosensitive recording medium and adding tension in a feeding-out direction to the photosensitive recording medium on a side nearer to a feeding-out side than the tight contact position of the photosensitive recording medium. CONSTITUTION:When the photosensitive recording medium 38 is exposed, the exposing board 39 of tight contact means 19, 39 and 45 is moved so as to be close to a mask original plate 12, and the recording medium 38 is brought into tight contact with the original plate 12. When the original plate 12 is replaced to a tight contact position, the exposing board 39 is moved so as to be separated from the original plate 12 and the recording medium 38 is separated from the original plate 12. When the exposing board 39 is moved, the length of a carrying path for the recording medium 38 is changed and the medium 38 is loosened, but the looseness of the medium 38 is rapidly absorbed by 1st and 2nd tension add means 71, 81, 84 and 87 which are provided on the feeding-in side and the feeding-out side at the tight contact position. Thus, the possibility that the photosensitive agent surface of the recording medium 38 is damaged is surely eliminated.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention involves bringing a mask original created based on image information into close contact with a photosensitive recording medium, and exposing the photosensitive recording medium through the mask original in this state. The present invention relates to an image recording apparatus that develops a latent image formed on a photosensitive recording medium by the exposure to obtain an output image.

[Prior Art] Generally, this type of image recording apparatus includes an exposure stage that is movable in a direction perpendicular to the direction in which the photosensitive recording medium is conveyed in order to bring the photosensitive recording medium into close contact with or separate it from the mask original. A close contact means is provided. When the photosensitive recording medium is exposed, the exposure table of the contact means is moved in a direction approaching the mask original plate, and is brought into close contact with the photosensitive recording medium or the mask original plate, and when the mask original plate is changed to the contact position, the exposure table or the mask The photosensitive recording medium or the mask original is moved in a direction away from the original.

[Problem to be Solved by the Invention 2] However, in this conventional image recording apparatus, the exposure table of the contact means is moved in a direction perpendicular to the conveyance direction of the photosensitive recording medium, so that the conveyance path of the photosensitive recording medium is Due to the change in length, there was a problem that the photosensitive recording medium would become slack and the photosensitive agent surface would be damaged.

This invention has been made by paying attention to the problems that exist in the conventional technology as described above, and its purpose is to move the exposure table of the contacting means in a direction perpendicular to the conveying direction of the photosensitive recording medium. Even if the photosensitive recording medium becomes slack due to a change in the length of the conveyance path, the slack can be quickly absorbed and the photosensitive surface of the photosensitive recording medium will not be scratched. It is an object of the present invention to provide an image recording device that can reliably prevent the risk of being stuck.

[Means for Solving the Problems] In order to achieve the above object, in this invention, in order to bring the mask original created based on the image information and the photosensitive recording medium into close contact, a contact means including an exposure table movable in the direction; an exposure means for exposing the photosensitive recording medium through the mask original in a state in which the mask original and the photosensitive recording medium are brought into close contact with each other by the contact means; In an image recording apparatus equipped with a developing means for visualizing a latent image formed on a photosensitive recording medium by exposure, the photosensitive recording medium is pulled back toward the feeding side from the position where the photosensitive recording medium is brought into close contact with the contact means. and a second tension applying means for applying tension to the photosensitive recording medium in the feeding direction on the feeding side from the contact position of the photosensitive recording medium. It was established.

[Function] In the image recording apparatus configured as described above, when exposing the photosensitive recording medium, the contact means is moved in a direction approaching the exposure table or the mask original, and is brought into close contact with the photosensitive recording medium or the mask original, When changing the mask original to the close contact position, the exposure table is moved in the direction away from the mask original,
It is separated from the photosensitive recording medium or mask original. When the exposure table moves, the length of the conveyance path of the photosensitive recording medium changes.
If slack occurs in the photosensitive recording medium, this slack in the photosensitive recording medium is quickly absorbed by the first and second tension applying means provided on the feeding side and the feeding side of the contact position. Therefore, it is possible to reliably prevent the photosensitive agent surface of the photosensitive recording medium from being damaged.

[Embodiment] Hereinafter, an embodiment of a color image recording apparatus embodying the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the apparatus main body 1 is formed into a substantially box shape, and a monochrome laser printer 2 is mounted on the upper part thereof. In the laser printer 2, a polygon scanner 3 irradiates a charged photoreceptor 4 with laser light to form an electrostatic latent image. The photoreceptor 4 on which the electrostatic latent image has been formed is developed by the developing device 5, and the toner image is transferred onto plain paper or OHP sheets fed from the paper feed cassette 6, and then the toner image is transferred to the fixing device 7. It will be established. Note that this laser printer 2 normally records data transmitted from a host computer.

A monochrome paper output tray 8 is provided on the laser printer 2, and when a monochrome image is required, a paper path switching section 9 is provided.
By switching, the output paper from the laser printer 2 is delivered onto the monochrome paper output tray 8. An automatic document feeder tray (ADF tray) 10 is provided on the main body 1 of the apparatus, and when a color image is required, the output paper from the laser printer 2 is transferred to this ADF tray by switching the paper path switching section 9. sent out on IO. And A.D.
The output paper fed onto the FI Ray 10 is fed to the paper feed roller 1.
Paper 3 in a monochrome print state is taken into the device main body 1 one by one by 1 and output from the laser printer 2.
A mask original plate 1 for a color image recording device
2 (12R, 12G, 12B).

Next, regarding the internal structure of the apparatus main body 1, the alignment device 15 is disposed at the lower part of the apparatus main body 1, and between the alignment device 15 and the ADF tray 10, a mask original transport path 16 is provided. and respective pairs of rollers 17, 18 are provided. The alignment device 15 includes a glass plate 19 and a pair of rollers 20 and 21 disposed close to each other on both sides of the glass plate 19.
It is composed of sensors and the like (not shown). A pair of recurler rollers 22 are provided in the middle of the mask original transport path 16, and the recurler rollers 22 remove curls from the mask original 12 sent out from the laser printer 2.

The mask original storage section 23 is arranged parallel to the mask original transport path 16, and a pair of rollers 24 and a cage 25 are provided between the mask original storage section 23 and the alignment device 15.
Or is provided. A mask original discharge tray 26 for discharging used mask originals 12 is disposed outside the apparatus main body 1, and a pair of rollers is provided between the mask original discharge tray 26 and the alignment device 15. 27, 28.29
and a gate 30 are provided. The rotation direction of each of the rollers 17, 18, 20, 21, 24, 27°28.29 can be reversed.

The exposure device 33 as an exposure means is connected to the alignment device 15.
It is disposed below the glass plate 19 so as to be able to move laterally along the lower surface of the glass plate 19. This exposure device 33 is composed of a rod-shaped white light source (lamp) 34, a reflecting plate 35 that reflects light from the lamp 34, and a filter unit 36, and the filter unit 36 includes a red filter 3.
6R, green filter 36G, and blue filter 36B
and is provided.

The cartridge 37 is removably attached to the upper part of the apparatus main body 1, and a long photosensitive recording medium 38 is stored inside the cartridge 37 in a state where it is wound on a roller 38a so as not to be exposed to light. After being pulled out from the cartridge 37, the photosensitive recording medium 38 passes between the glass plate 19 of the alignment device 15 and the exposure table 39, and also passes through a buffer device 40, a pressure developing device 41, a separating roller 42, and a driving roller 43. The film is then routed onto a take-up roller 44 through the winding roller 44.

Note that the photosensitive recording medium 38 is, for example, disclosed in Japanese Patent Application Laid-Open No. 62-1
Similar to the well-known structure shown in 43044, the main material is a photocurable resin using a photopolymerization initiator, red,
Microcapsules containing a photocurable resin that hardens when exposed to light of green and blue wavelengths and cyan, macenta, and yellow dye precursors are coated onto a base sheet.

The exposure table 39 is disposed facing the glass plate 19 of the alignment device 15, and is moved up and down by a cam 45. The glass plate 19, the exposure table 39, and the cam 45 constitute a contact means, and the mask original conveyed onto the glass plate 19 is lowered to a position where it joins the exposure table 39 or the glass plate 19. 12 and the photosensitive recording medium 38 are brought into close contact. The fixed roller 46 is arranged to face one end of the exposure table 39, and when the exposure table 39 is lowered to a predetermined position, it comes into pressure contact with the one end of the exposure table 39, and the mask original 12
During exposure, the photosensitive recording medium 38 is clamped and fixed between the exposure table 39.

The cassette 47 is removably attached to the outside of the apparatus main body l above the mask original discharge tray 26, and a number of color developer sheets 48 are housed in a stacked state inside the cassette 47. This color developer sheet 48 is, for example, JP-A-58-8
Similar to the well-known structure shown in Japanese Patent No. 8739, it has a structure in which a color developer is coated on a base paper, and is set in the cassette 47 so that the surface coated with the color developer faces downward. A feeding device 49 equipped with a suction cup etc. is a cassette 47.
The color developer sheets 48 are fed one by one from the cassette 47 by this feeding device 49 .

The buffer device 40 constitutes a buffer means, and the photosensitive recording medium 38 on which a latent image is formed by exposure by the exposure device 33.
The latent image forming area is temporarily stored in this buffer device 40. The pressure developing device 41 constitutes a developing means and includes a pair of pressure rollers 50 therein. The latent image forming area of the photosensitive recording medium 38 stored in the buffer device 40 and the color developer sheet 48 fed from the cassette 47 are overlapped between the pressure rollers 50 of the pressure development device 41. Pressure developed.

The heat fixing device 53 is disposed above the pressure developing device 41, and includes a casing 5 that includes a heater 54 and an impeller 55.
6, a plurality of conveyor rollers 57, 58, 59 arranged below the casing 56, and a conveyor belt 61 installed between the pair of rollers 60. An output sheet discharge tray 62 is provided outside the main body 1 of the apparatus, and after the developer sheet 48 on which the image is formed is heat-fixed in a thermal fixing device 53, it is discharged onto this discharge tray 62.

Next, a structure for applying tension in the pulling direction to the photosensitive recording medium 38 on the feeding side of the position where the photosensitive recording medium 38 is brought into close contact with the exposure table 39 will be described.As shown in FIG. A DC motor 71 serving as a tension applying means is disposed near the cartridge 37, and rotation of the motor 71 causes the gear 72.
3, a driving force in the rewinding direction is applied to the roller 38a for the photosensitive recording medium 38. encoder 74
is provided on the motor shaft of the motor 71, and a rotation detection sensor 75 is provided facing the encoder 74.

Then, when the photosensitive recording medium 38 is pulled out from above the roller 38a in the cartridge 37, the rotation of the encoder 74 is detected by the rotation detection sensor 75, and the control circuit 74 detects the rotation of the encoder 74.
A detection signal is output at 6.

Next, a structure for applying tension in the feeding direction to the photosensitive recording medium 38 on the feeding side from the position where the photosensitive recording medium 38 is in close contact with the exposure table 39 will be described.As shown in FIG. The timing heald 79 is placed in parallel between each pair of timing pulleys 80, and the buffer roller 40a of the buffer device 40 is attached between both timing belts 79. The step motor 81 is disposed on one side of the buffer device 40, and its stator is rotatably supported by a machine frame or the like, and a timing boot IJ 80 on one side is fixed to the rotor. The step motor 81 is driven and controlled by the control circuit 76.

The arm 82 projects from above the stator of the step motor 81, and its tip is opposed to the stopper 83.

A spring 84 is provided between the arm 82 and the machine frame, etc., and urges the stator of the step motor 81 to rotate clockwise in FIG. 3. The spring 84, the step motor 81, etc. constitute a second tension applying means, and tension is applied to the photosensitive recording medium 38 via the timing belt 79 and the buffer roller 40a.

Next, the operation of the color image recording apparatus configured as described above when forming a plurality of color images from one set of mask originals will be described.

Now, when forming this color image, first, the monochrome laser printer 2 is used to form a mask original plate 12R for printing.
is created and delivered onto the ADF tray 10. This mask original plate 12R has toner, which is a light-shielding image, placed on other parts of the mask original plate 12R so as to harden the microcapsules containing a cyan dye precursor in the microcapsules coated on the photosensitive recording medium 38. .

Then, the mask original 12R is fed from the ADF tray 10 into the apparatus main body l by the paper feed roller 11, passes through the mask original transport path 16, and is sent to the alignment device 15 by rollers 17 and 18. Also, this mask original version 1
During the transfer of 2R, the curl of the mask original 12R is corrected by the recurler roller 22. At this time, the gate 25 is placed at the position shown by the solid line in FIG.

Further, the mask original 12R is transported to the vicinity of the exposure position by the roller 20 of the alignment device 15, and then moved to a predetermined position based on the reading of the alignment mark on the mask original 12R by a sensor (not shown). Matched. Immediately before this positioning, the exposure table 39 or the cam 45
The photosensitive recording medium 38 is lowered to a predetermined position by pressing the fixed roller 46 against one end of the exposure table 39, and is clamped and fixed between the photosensitive recording medium 38 and the exposure table 39.

At this time, the buffer device 40 has been moved in advance to a position P3 where the photosensitive recording medium 38 is pulled out a little, as shown by the broken line in FIG. In this state, the drive roller 43 is fixed so as not to roll back, and the buffer device 40 is moved from the P3 position in FIG. 1 in the direction of arrow C by the step motor 81 or the control circuit 76 shown in FIG. driven by Then, since both ends of the photosensitive recording medium 38 are substantially fixed, the buffer device 40
It is not moved from the position, but is rotated together with the arm 82 against the biasing force of the spring 84 due to the reaction force of the stator side of the step motor 81. And this arm 82 or stopper 83
When the blades 84 are separated from each other, a predetermined tension is applied to the photosensitive recording medium 38 according to the expansion and contraction state of the blades 84. Note that the tension of the photosensitive recording medium 38 is desirably maintained at 1 to 2 kgf in the case of a 223 mm wide photosensitive recording medium 38.

After the alignment of the photosensitive recording medium 38 is completed, the photosensitive recording medium 38 is further lowered by the exposure table 39 or the cam 45, and is bonded to the glass plate 19 of the alignment device 15, and then is bonded to the mask original plate 12R.
and the photosensitive recording medium 38 are brought into close contact. At this time, the change in the path length of the photosensitive recording medium 38 due to the lowering of the exposure table 39 is as follows.
This is absorbed by moving the buffer device 40 from the P3 position to the P2 position in FIG. Further, even during absorption by the photosensitive recording medium 38, a predetermined tension is applied to the photosensitive recording medium 38 by the spring 84.

After that, the lamp 34 of the exposure device 33
6R, the exposure device 33 travels in the direction indicated by the arrow in FIG. be done. When this exposure is completed, the lamp 34 is turned off and the exposure device 33 is moved back in the direction of arrow B in the figure. At this time, the filter unit 36 of the exposure device 33 is moved by a drive source (not shown), and the clean filter 36G is placed oppositely above the lamp 34.

Also, during the return movement of the exposure device 33, the exposure table 3
9 is raised to a predetermined position by the cam 45, and the photosensitive recording medium 38 is separated from the glass plate 19 of the alignment device 15 and the mask original 12R.

At this time, the buffer device 40 moves from the P2 position to the P3 position to remove the slack in the photosensitive recording medium 38 that occurs as the exposure table 39 rises.
Absorbed by being moved into position. Even when the slack of the photosensitive recording medium 38 is absorbed, since a predetermined tension is applied to the photosensitive recording medium 38 by the spring 84, the photosensitive recording medium 38 is quickly and reliably separated from the mask original 12R.

On the other hand, since the photosensitive recording medium 38 is given hack tension in the rewinding direction by the roller 38a for the photosensitive recording medium 38 in the cartridge 37, the exposure table 39 is lowered prior to exposure. When
A length of the photosensitive recording medium 38 corresponding to the amount of descent of the exposure table 39 is pulled out from inside the cartridge 37, and the exposure table 39
When the photosensitive recording medium 38 is raised after exposure is completed,
The tape is then rewound into the cartridge 37 to absorb the slack. The pack tension of the photosensitive recording medium 38 is set by controlling the drive of the DC motor 71 by the control circuit 76, and is always equal to the tension applied to the photosensitive recording medium 38 by the spring 84 from the buffer device 40 side. adjusted to be equal. For this reason, the photosensitive recording medium 3
8 is accurately positioned with respect to the exposure table 39 without any positional deviation.

Note that even after the exposure using the red mask master plate 12R is completed as described above, the exposure table 39 is maintained in a raised state at a predetermined position, and the photosensitive recording medium 38 is placed at one end of the exposure table 36. It is held in a fixed state relative to the exposure table 39 by a fixed roller 46 pressed against it.

Next, a green mask original 12G is created by the monochrome laser printer 2, and is fed into the apparatus main body 1 through the ADFI-ray 1t) and paper feed roller 11.

Then, when the mask original 12G is conveyed through the curler roller 22 and the mask original transport path 16 to just before the roller 17, the rollers 17, 18, 27, 29 and the rollers 20, 21 of the alignment device 15 move the mask original The exposed mask original 12R is sent out from the exposure position on the alignment device 15, and at the same time, a new mask original 12G is sent to the exposure position and stopped. At this time, the gate 3o is placed at the position shown by the solid line in FIG. This state is maintained by stopping 29.

The clean mask original plate 12G sent to the alignment device 15 is the same as the red mask original plate 12G sent to the alignment device 15.
As in the case of R, after being aligned with the photosensitive recording medium 38, the exposure table 39 is lowered to come into close contact with the photosensitive recording medium 38. In this state, the lamp 34 of the exposure device 33 is turned on, the exposure device 33 is run, and the mask original plate 1 is exposed to clean light that has passed through the clean filter 36G.
Exposure is performed via 2G. After the exposure is finished, the exposure table 39 is raised to a predetermined position, the exposure device 33 is moved back, the filter unit 36 is moved, and the blue filter 36B is placed above the lamp 34 to face it.

Next, the blue mask original 12B created by the monochrome laser printer 2 is fed into the apparatus main body 1 in the same way as in the above case, and when it is conveyed to just before the roller 17, the rollers 17, 18, 27 °28 and alignment device 15
The rollers 20 and 21 are rotated in the direction of conveying the mask original to the right, and the exposed mask original 12G is sent out from the exposure position on the alignment device 15, and at the same time, a new mask original 12B is sent to the exposure position. and stopped. At this time, one gate 25 is placed at the position shown by the solid line in FIG. 1, and the other gate 30 is placed at the position shown by the broken line in the same figure.
2G is held between the rollers 28 and held in that state by stopping the rollers 28 when its rear end passes through the cage 30.

Then, the blue mask original 12B sent to the alignment device 15 is transferred to the photosensitive recording medium 3 as in the above case.
8 and are brought into close contact. In this state, the mask original 12B is illuminated by blue light passing through the blue filter 36B.
Exposure is performed through the. Through the above operations, a latent image of a desired color image is recorded on the photosensitive recording medium 38.

Thereafter, the exposure table 39 is raised to the initial position by the cam 45, the fixed roller 46 is separated from one end of the exposure table 39, the fixation of the photosensitive recording medium 38 is released, and the buffer device 40 is moved as shown in FIG. The photosensitive recording medium 38 is moved in the direction of arrow C toward the P5 position, and the unexposed portion of the photosensitive recording medium 38 is pulled out from inside the cartridge 37 to a position below the exposure table 39. At this time, the photosensitive recording medium 38 is conveyed by the rotation of the drive roller 43, and when the front end of the latent image reaches the pressure roller 50 portion of the pressure developing device 41, the conveyance is stopped. Then, in synchronization with the conveyance of the photosensitive recording medium 38, the developer sheet 48 is fed out from the cassette 47 by the feeding device 49, and the leading edge of the developer sheet 48 is placed at the leading edge of the latent image on the photosensitive recording medium 38. When the color developer sheet 48 reaches the color developer sheet 48, the conveyance of the color developer sheet 48 is stopped.

In this state, the pressure roller 50 of the pressure development device 41 is rotated by a drive device (not shown), and the photosensitive recording medium 38 or the color developer sheet 48 is superimposed on the photosensitive recording medium 38 or the color developer sheet 48 and transferred while being pressed. As a result, the uncured microcapsules on the photosensitive recording medium 38 are destroyed by pressure, and a color image corresponding to the latent image on the photosensitive recording medium 38 is transferred to the developer sheet 48.
developed on top. Also, prior to this development, the exposure table 39
The photosensitive recording medium 38 is then lowered to a predetermined position again, and the fixed roller 46 is pressed against one end of the exposure table 39, so that the photosensitive recording medium 38 is clamped and fixed between the exposure table 39 and the exposure table 39.

When the exposure table 39 is lowered, the buffer device 40 or P5
By moving from the position to the P4 position, changes in the path length of the photosensitive recording medium 38 are absorbed.

When the pressure roller 50 of the pressure developing device 41 rotates, the buffer device 40 is operated in synchronization with the rotation of the pressure roller 50 shown in FIG. It is moved in the direction of the arrow from the position toward the P1 position.

After development, the color developer sheet 48 is peeled off from the photosensitive recording medium 38 by the separation roller 42 and transferred to the heat fixing device 53.
You will be guided in the direction of In the heat fixing device 53, the developer sheet 48 is heated by hot air heated by the heater 54 and circulated within the chi sink 56 by the impeller 55, thereby promoting color development of the color image.

At the same time, the binder polymer (binder resin) for fixing the color developer to the base paper on the color developer sheet 48 is thermally melted to make the surface smooth, and the surface of the color developer sheet 48 has a suitable amount of surface. Shine is obtained. Then, the color developer sheet 48 that has undergone the color development and gloss treatment is discharged onto the output sheet discharge tray 62.

During the above-described series of development and color development/glossy processing, the exposed photosensitive recording medium 38 is stored in the buffer device 40 in a state where it is held and fixed between the exposure table 39 and the fixed roller 46, and the exposure table 39 is raised and lowered. This is absorbed by changes in the path length of the photosensitive recording medium 38 due to changes in the path length of the photosensitive recording medium 38 or by movement of the buffer device 40. Therefore, while the development and coloring gloss processing for one exposed screen is being performed, the changes in the next color image at the exposure position are Exposure processing of the latent image can be performed.

In other words, when exposing the second color image,
First, the rollers 17, 18, 27, 29 and the rollers 20, 21 of the alignment device 15 are rotated in the direction of conveying the mask original to the left, and the blue mask original 12B at the exposure position is sent out to the left. At the same time, the mask original plate 12R for let, which is held at the position of the roller 29, is sent to the exposure position. At this time, both gates 25 and 30 are arranged at the positions shown by solid lines in FIG. Once it has passed, the roller 17 is stopped to maintain that state.

Then, the red mask original plate 12R sent to the alignment device 15 is placed on the photosensitive recording medium 3 as in the above case.
8 and are brought into close contact. In this state, the mask original plate 12R is exposed to light passing through the red filter 36R.
Exposure is performed through the.

Next, the rollers 24, 18, 27, 28 and the rollers 20, 21 of the alignment device 15 are rotated in the direction of conveying the mask original to the left, and the red mask original 12R at the exposure position is sent out to the left. At the same time, the green mask original 12G held at the position of the roller 28 is sent to the exposure position. At this time, both gates 25.30
is arranged at the position indicated by the broken line in FIG. It is held in that state by stopping.

Then, the clean mask original 12G sent to the alignment device 15 is aligned and brought into close contact with the photosensitive recording medium 38, and in this state, the mask original 12G is heated by green light passing through the green filter 3-6G. Exposure is performed through the

Further, in almost the same manner as described above, the clean mask original plate 12G at the exposure position is sent out to the right, and at the same time, the blue mask original plate 12B held at the position of the roller 17 is sent to the exposure position. It can be done. Then, with this mask original plate 12B in close contact with the photosensitive recording medium 38, blue light passing through the blue filter 36B causes
Exposure is performed through the mask original 12B. By the above operations, a color latent image is recorded on the photosensitive recording medium 38, and based on this latent image, the pressure developing device 4
A color image is formed on the color developer sheet 48 by the color developer sheet 48, the heat fixing device 53, and the like.

In this way, three mask original plates 12R and 12G.

By repeatedly performing the exposure operation using 12B, a predetermined number of color images can be continuously output from one set of mask originals 12. After the required number of color images have been output, each mask original plate 12R, 12G, 12
B passes through rollers 28 or 29 and is discharged onto the mask original discharge tray 26.

Also, if the next mask original 12 is output from the monochrome laser printer 2 while a series of color images are being exposed, the mask original 12 is temporarily stored on the ADF tray 10 and then used for the previous mask original 12. After the exposure of the set is completed, the sheets are fed into the main body 1 of the apparatus one by one from the ADF tray 10 by the sheet feeding roller 11. Furthermore, when a mask original output from another monochrome laser printer or a previously used mask original is to be used again, it can be fed into the apparatus main body 1 by setting it in the ADFI-RAY IO. .

! Another Embodiment I Next, another embodiment of the present invention will be described with reference to FIG.

In this embodiment, a DC motor 87 is provided as the second tension applying means in place of the step motor 81 and/or screw 84 of the previous embodiment.
The rotation of is detected by an encoder 88 and a rotation detection sensor 89. Then, based on the rotation detection signal detected by the rotation detection sensor 89, the control circuit 76 controls the drive of the DC motor 87 via the motor driver 90, and drives the DC motor 87 via the buffer device 40. A predetermined feed amount and predetermined tension are applied. Therefore, in this embodiment as well, the same effects as in the previous embodiment including the step motor 81 can be obtained.

Note that this invention is not limited to the configurations of the above-mentioned embodiments (for example, the configurations of the first and second tension applying means may be changed as appropriate) without departing from the spirit of the invention. It is also possible to change the configuration of each part arbitrarily within the scope of the present invention.

[Effect of the invention] Since this invention is configured as explained above,
When the exposure table of the contact means is moved in a direction perpendicular to the conveyance direction of the photosensitive recording medium, even if the photosensitive recording medium becomes slack due to changes in the conveyance path length of the photosensitive recording medium, the slack can be quickly removed. It has the excellent effect of reliably preventing the photosensitive agent surface of the photosensitive recording medium from being damaged.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a color image recording device embodying the present invention, FIG. 2 is a perspective view showing a configuration for applying tension in the pullback direction to a photosensitive recording medium, and FIG. The figure is a perspective view showing the configuration of a mechanism for applying tension in the feeding direction to a photosensitive recording medium, and FIG. 4 shows another embodiment of the configuration for applying tension in the feeding direction to a photosensitive recording medium. FIG. 12...Mask original plate, 19...Glass plate constituting the contact means, 33...Exposure device as exposure means, 38
. . . Photosensitive recording medium, 39 . . . Exposure table forming close contact means, 41 .
...Cam constituting the close contact means, 71...DC motor constituting the first tension applying means, 81...Second
a step motor 84 constituting the tension applying means;
...Spring constituting the second tension applying means, 87
...DC motor constituting the second tension applying means.

Claims (1)

[Claims] 1. Mask original plate (12) created based on image information
and a photosensitive recording medium (38), an exposure table (39) movable in a direction perpendicular to the conveying direction thereof.
and the mask original plate (19, 39, 45) by the contact means (19, 39, 45).
12) and the photosensitive recording medium (38) are in close contact with each other,
An exposure means (33) that exposes the photosensitive recording medium (38) through the mask master plate (12), and a latent image formed on the photosensitive recording medium (38) by the exposure of the exposure means (33) is visualized. In an image recording apparatus equipped with a developing means (41), on the feeding side of the position where the photosensitive recording medium (38) is in close contact with the close contact means (19, 39, 45), the photosensitive recording medium (38) is pulled back toward the photosensitive recording medium (38). a first tension applying means (71) for applying tension in the feeding direction to the photosensitive recording medium (38) on the feeding side from the contact position of the photosensitive recording medium (38); The second tension applying means (
81, 84) and (87).