JP2779669B2 - Image transfer device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color proof forming apparatus for transferring an image by overlaying a developed colored photosensitive film on an image receiving sheet.

[Conventional technology]

Conventionally, in the field of printing plate making, photographic originals (negative color film, reversal color film paper, etc.)
, A halftone dot film of, for example, three or four colors is created from the continuous tone image, and a printing plate such as a PS plate is created from the film. Therefore, before making a printing plate,
At present, color separation and image synthesis are performed using a large amount of films. Many mistakes such as mistakes in characters and layout occur during this complicated operation. Furthermore, it is necessary to respond to a sudden change from the orderer, and it is necessary to check in advance whether the printed matter is finished with the desired color tone and layout. To make these confirmations, proofs and various other systems called proofs are used to make a formal printing plate.

For example, a halftone film using a CRT, one using a silver salt such as a color photosensitive material, one using a non-silver salt photosensitive material such as diazo, one using an electrophotographic method, one using a dry toner to form an image, etc. An image is created by the method and a completed printed matter is estimated. However, these calibration systems generally require a long time to make a single calibration and have problems such as large equipment, high material cost, poor workability, and the like. It is not at present. In recent years, a proof system using a photopolymer photosensitive material has been used as a method for obtaining proofs, and the same pigment as printing ink has been used as a color image, and a multicolor image that is quite similar to a printed material has been obtained. .
Fig. 10 (a) shows a method for creating such a proof.
As shown in FIG. 10 (b), each colored photosensitive sheet of Y, M, C, and BK is overlapped with a separation positive film corresponding to each color as shown in FIG. An image sheet of each color as shown in (c) is obtained. Then the eleventh
These operations of superimposing the image receiving sheet and the image sheet of the first color by the transfer rollers 33 and 34 of the transfer device shown in FIG. Perform four times to create a multicolor image. However, this alone results in an inverted image, so that the image is transferred once more to form a normal image.

At the time of image transfer, as shown in FIGS. 11 (b) and 11 (c), in order to prevent wrinkles, unevenness and color shift, each sheet is placed on a reinforcing plate such as an aluminum plate which is larger than the sheet, and the image is transferred. .

[Problems to be solved by the invention]

In such a color proof making apparatus and its transfer apparatus, it is necessary to sequentially perform transfer while removing a support such as a PET base other than a transfer product of an image sheet after image transfer on an image receiving paper. At present, it was done by people. This operation must be performed four times in order to produce one color proof, and the operation of handling the reinforcing plate 21 together with the operation of aligning each image sheet and the image receiving sheet requires skill and labor. SUMMARY OF THE INVENTION It is an object of the present invention to provide a highly efficient image transfer apparatus that does not require such labor and skill.

[Means for solving the problem]

This object is achieved by any of the following technical means (1) to (3).

(1) A transfer heating surface body, and a loading section having a means for fixing an image receiving sheet on the transfer heating surface body and a pin bar for positioning and attaching the image sheet are provided, and a pressure roller is provided via the both sheets. After transferring the image of the image sheet to the image receiving sheet by applying pressure to the transfer heating surface, the front end of the transferred image sheet is flipped up by the peeling plate provided in the loading section, and the flipped up sheet is flipped up. An image transfer apparatus, wherein a leading end portion is inserted into a peeling roller, and the image sheet is peeled and collected from a state of close contact with the image receiving sheet on the transfer heating surface member.

(2) The image transfer apparatus according to item (1), wherein the transfer heating surface is a transfer heating drum.

(3) The image transfer apparatus according to (2), wherein the transfer heating surface member is a transfer heating plate.

〔Example〕

FIG. 1 shows the configuration of an embodiment of a colored light film used in the color proof forming apparatus of the present invention. That is, a 30 μm thick transparent PET base with a thickness of 75 μm
m heat-softening layer, and a colored photosensitive layer having a thickness of 1 to 2 μm thereon.

The colored photosensitive layer is easily peeled off from the heat-softening layer by heating. The colored photosensitive layer is composed of a photopolymer composed of a pigment, a photoreceptor, and a binder. When the colored photosensitive layer is exposed to light, the colored photosensitive layer changes into a structure that is easily dissolved in a developer. This film has four types of colored films. And those colors are, for example, those of Y, M, C, BK. The original to be printed is a black-and-white positive film separated into four colors.

As shown in FIG. 2 (a), the positive film of each original is overlaid and exposed in close contact with each colored photosensitive film of the corresponding color.

(Transfer Method) Each of the exposed colored photosensitive films is developed in a developing section, washed with water and dried to obtain each colored image shown in FIG. 2 (b).
Then, each of the developed colored photosensitive films is correctly positioned on the same image receiving paper at the transfer portion, and is transferred by heating and pressing repeatedly four times. Support for colored photosensitive film (PE
As shown in FIG. 3 (a), the (T base) is easily peeled between the heat-softening layer and the photosensitive layer, and is removed after the transfer under heat and pressure. Then, as shown in FIG. 3 (b), the creation of the color proof is completed by the transfer four times.

Here, one exposure time is 30 to 40 seconds, and the development time is 10
Approximately 60 seconds including 20 seconds drying. The transfer is performed between transfer rollers heated and pressed, but the surface temperature of the transfer roller is 50 ° C.
100100 ° C., and the time for one transfer is about 60 seconds.
Four transfers require a net 4 minutes. When the transfer is completed four times in this way, the creation of the color proof is completed.

(Color Proof Making Apparatus) FIG. 4 is a side sectional view, FIG. 5 is a front sectional view, and FIG. 6 is an embodiment of a color proof creating apparatus incorporating the image transfer apparatus of the present invention realized by such a configuration. 9 (a), (b) and (c) are cross-sectional views of the sheet positioning portion, FIG. 8 is a plan view of the sheet positioning portion, and FIG. 9 (a). A) cross-sectional view of the release plate operating portion;
This will be described with reference to a plan view of the peeling plate operating portion in FIG. 9 (b).

The color proof creating apparatus according to the present embodiment includes a developing unit 170 and a transfer unit 100 except for an exposure device.
And a transfer unit 100 at the top, and has a moving caster 101D and an installation leg 101C.

(Apparatus-Developing Unit) The developing unit 170 is provided with an insertion table 171 for the exposed colored photosensitive film F and a sensor 172 for the film, and is driven through a drive transmission device such as a film transport motor 173 and a pulley 173A. Transport roller pairs 174 are arranged at a pitch shorter than the minimum film length, and the roller pairs are connected by transport guides 176 and 178. Further, an insertion port 179 for the processing tank 180 is disposed below the pair of transport rollers at the last stage. The processing tank 180 is composed of a developing tank 181 and a washing tank 186, and further connected to a drying unit 190 thereafter. The developing tank 181 is provided with a developing rack 182, and a pair of conveying rollers 183A is disposed at an appropriate interval, and each roller pair is connected by a conveying guide 184. The developing brush roller 187A is provided at one location. The developing tank 181 is filled with the developer so that the liquid level is below the transfer roller pair 185, and the developer is heated by the developer circulation pump 181A.
The liquid temperature is controlled and equalized through a heat exchange tank 181B having 181C.

A washing tank 186 is provided next to the developing tank 181 via a transfer roller pair 185, and a transfer roller pair 187C is provided in the washing tank 186.
Further, a washing brush roller 187B is provided, and spray nozzles 188 are arranged above and below the transport path thereof, so that the washing and spray brushing is performed by the washing spray pump 186A. Next to the washing tank 186, one pair of transfer rollers
A drying unit 190 is provided via 89, and a pair of transport rollers 194A and a transport guide 194B are provided. Above and below the transport guide 194B, a heater 191 and a fan motor 192 for blowing air are provided. A film basket 193 for collecting a colored photosensitive film for development is attached to the front of the outer main body of the drying unit 190.

Further, a pump 181D for replenishing the developing solution to the developing tank 181 is provided, and timely replenishment is performed with respect to the power reduction of the developing solution.

The operation of the developing unit 170 is such that the colored photosensitive film F loaded on the insertion table 171 is sent to a developing tank 181 by a pair of conveying rollers 174 on a conveying guide 176 according to a command from a film sensor 172, and a developing rack 182 is formed. Transport roller pair
183A, brush roller 187A to further enhance the developing effect while being immersed and conveyed by conveyance guide 184, and finish development while rubbing the film surface.
The water is transferred to a washing tank 186 by 185, where the water is washed by a spray nozzle 188 and the brush roller 187 B is forcibly washed to increase the washing efficiency, and is dried in a drying unit 190 and collected on a basket 193.

The description of the formulation of the developer used in this embodiment is omitted.

Developing time is about 60 seconds in 25 seconds in a developing tank, 10 seconds in water washing, and 20 seconds in drying when the size of the colored photosensitive sheet to be used is about A1 plate. The developer temperature is controlled at 25 to 35 ° C.

(Apparatus-Transfer Unit) Next, the transfer unit 100 will be described. Ball bearings 103A attached to the body frames 101 arranged on both sides,
A transfer heating drum 102 is provided as a transfer heating surface via a bearing 103 having a built-in bearing 103B, and the drum can be driven by a drum drive motor 107 via chain wheels 104 and 105 and a chain 106. In addition, a heating heater 128 is provided at the shaft center with a mounting bracket 127.
Is provided. Therefore, the heating heater 128
This makes it easy to control the entire drum to a uniform temperature (50-100 ° C). A plurality of pressing rollers 108 and a temporary bonding roller 108A are arranged at a predetermined interval around the outer periphery of the drum 102.
A bearing portion of the roller 108 is provided so as to be slidable in the radial direction of the drum 102 of the main body frame 101 so as to contact the roller 102. The spring 109 urges the bearing to move the bearing in the crimping direction. Further, the pressing roller is opposed to the spring 109 by pull-up spacers 111 provided on the outer peripheral portions on both sides of the transfer drum 102.
It is possible to break the contact with the.

A pressure roller (heating press roller) 132 that presses the transfer heating drum 102 at a uniform temperature and further heats the transfer heating drum 102 to a temperature required for transfer is provided as a roller coated with silicon rubber 132B on the iron core roller 132A. The shaft portions at both ends are received by a bearing 133 having a built-in ball bearing 133A and a bearing stopper 133B. The bearing 133 is attached so as to slide in a slide guide 139 attached to the main body frame 101. The sliding direction depends on the radial direction of the transfer heating drum.
The bearing 133 is directly connected to the movable portion 142B of the pressurizing air cylinder 142, and the pressurizing air cylinder fixing portion 142A is fixed to the main body frame 101 by the cylinder mounting bracket 141. In addition, a heater 138 is provided stationary on the axis of the heating press roller, and is fixed on a mounting bracket 137 provided on a sliding bearing 133.

The press roller 132 is rotated via a separate drive motor 143 and drive transmission wheels 144 and 145 while being separated from the transfer drum 102 by the pull-up spacer 111, so that the press roller surface can be maintained at an appropriate uniform temperature. .

(Apparatus-Positioning) Next, an image sheet (developed colored photosensitive film) F
And superposition position determining section for image receiving sheet (image receiving paper) P
110 will be described. One portion of the surface of the transfer heating drum 102 is shaved to provide a flat portion, and the heat insulating plate 119 is fixed with the heat insulating plate fixing screw 121. If necessary, an adhesive film 126 having a weak adhesive force for maintaining the flatness of the transfer paper is provided. Fix the end of the screw 1
The transfer drum is fixed by 22 to make the transfer drum surface slightly adhesive. An image receiving paper pressing plate 113B is fixed to a movable plate 113A of a hinge 113 mounted on the heat insulating plate 119, and a pin bar 112 is mounted on the pressing plate 113B. The release plate rotating shaft 115A is attached to a bearing 117 provided on the holding plate 113B.
A peeling plate 115 is fixed to the shaft 115A, and a torque spring 115B is applied to the shaft 115A so that the peeling plate 115 is on the same flat plate as the image receiving sheet (image receiving paper) holding plate 113 or is parallel thereto. It is being rushed. A cam follower lever 125 is attached to an end of the peeling plate rotation shaft 115A.
Then, a peeling plate opening / closing cam 123 is provided at a predetermined position of the main body frame 101.
Are fastened with screws 124.

Then, the transfer heating drum 102 rotates, and the lever 125
Touching the opening / closing cam 123, the release plate 115
As the sheet is flipped up, the colored photosensitive film is pulled out of the pins of the pin bar 112 and flipped upward, and its end is held by a peeling roller 153 waiting near the outer peripheral surface of the transfer drum 102. When the lever 125 passes through the opening / closing cam 123, the release plate 11
5 is returned by the torque spring 115B.

The peeling roller 153 is driven by a drive motor 151 via a drive transmission wheel and a chain 152 together with a plurality of transport roller pairs 154, and the rollers are connected by a transport guide 155. A support sheet collection unit 156 is provided at the end of the transport guide 155.

An outer cover 101A is provided on the outer side of the main body frame 101 of the transfer unit 100 and the developing unit 170 configured as described above, and an operation panel and the like are provided to facilitate and simplify the operation and consider safety. Have been.

(Method of Transfer, Function) Next, the function of the transfer unit 100 will be described. In loading the colored photosensitive film F and the image receiving paper P, which have been developed by the developing unit 170 or another developing machine, onto the transfer drum 102, first, the image receiving paper P is placed on the image receiving paper holding slope 113B of the overlapping position setting unit 110. The holding slope 113B is closed, held down, locked and fixed by the lock fitting 116 below. In addition, the drum
Similarly to the image transfer, the image receiving paper is pressed and fixed by a pressure roller similarly to the image transfer, and then the pin of the pin bar 112 provided on the holding slope 113B is attached to the end of the developed colored photosensitive film F by the pin bar. The transfer operation is started by fitting a plurality of reference holes drilled corresponding to 112. At the time of this loading, the pressure roller (heating press roller) 132 and the temporary adhesive roller 108A in the vicinity thereof are lifted from the transfer drum by pull-up spacers 111 provided on both sides of the transfer drum 102. First, the temporary bonding roller 108A separates from the pull-up spacer 111 and starts to contact the drum surface of the transfer heating drum 102, and the heating press roller also starts press bonding by the operation of the pressurizing air cylinder 142. Before that, both the transfer heating drum 102 and the heating press roller 132 have a surface temperature of 60 ° C. and
Heated to 110 ° C. Then, the image is transferred from the film F to the image receiving paper P by the pressure heating roller and the transfer heating drum. At this time, the colored photosensitive layer of the film F is very easily peeled because the heat softening layer is heated. Then, as shown in FIGS. 9A and 9B, the cam follower lever 125 is flipped up by the peeling plate opening / closing cam 123, so that the PET base including the thermal softening layer which is the support of the film F starts peeling. And peeling roller 1
53, while transferring the image to the receiving paper
The base is transported through the transport rollers 154 and the transport guide 155, and is taken out to the film collecting unit 156. On the other hand, the image transferred onto the image receiving paper P is transferred with further increased strength by heating and pressurizing the drum 102, and stops at the original position even when the overlapping position locating unit 110 comes to the loading / unloading position. I do. Here, the first transfer (for example, transfer of Y) is completed. Therefore, the image receiving paper is left as it is, the reference hole of the second developed colored photosensitive film is fitted to the pin of the pin bar 112, and the operation is performed again. Then, similarly to the first time, another color image is transferred (for example, M color transfer). Is completed. In the same manner as before, a third transfer film (for example, a film of C color) is loaded on a pin bar at the loading position, and the transfer is performed. Finally, a fourth film (for example, a BL film) is placed on a pin bar 112.
And transferred onto the image receiving sheet.

Thus, the color proof is completed, the image receiving paper holding slope lock fitting 116 is removed, the image receiving paper holding slope 113B is opened, and the transferred image receiving paper, that is, the color proof is removed and collected.

Although the transfer heating drum was used as the transfer heating surface member as in the above embodiment, as shown in FIG. 9 (c) as a second embodiment, instead of the transfer heating drum 102, a transfer heating slope was used. The one provided with 102A will be described. Although not shown, a heater is embedded in the heating plate, and the heating plate is capable of heating control, and a pin bar 112 as a registration pin, and a peeling plate 115 rotatable with a hinge 115C. Is attached to the heating plate, a lever 125 is attached to the end of the rotating shaft 115A of the peeling plate 115,
A torque spring is provided on the rotation shaft 115A, and the torque spring urges the peeling plate 115 so as to sink into a dent recessed on the surface of the heating plate 102A. And the transfer heating plate 10
2A moves in the direction of the arrow in FIG.
Is lifted on the cam 123, so that the release plate 115 is lifted from the transfer heating surface.

On the other hand, an image receiving sheet is fixed to the transfer heating plate 102A in close contact with the surface on the transfer heating plate by means similar to that shown in the first embodiment. After the image sheet is positioned on the pin bar 112 and set thereon, the transfer heating plate 102
The two sheets on A are pressed by a pressing and heating roller, and the transfer and heating plate 102A moves to perform the pressing and heating transfer.

As the movement progresses, the peeling plate 115 is lifted, and the edge of the image sheet is flipped up with it, and the image which is easily separated by the heat softening layer is transferred to the image receiving sheet and left, and the support with the heat softening layer attached The body sheet is peeled off, and the leading end of the body sheet is bitten by the peeling roller 153, and the support sheet is sequentially removed as the image is transferred.

The above is the operation and configuration of the second embodiment of the transfer heating surface member.

〔The invention's effect〕

According to the present invention, the operation of transferring a colored photosensitive film onto an image receiving paper to produce a color proof is performed by fixing the image receiving paper at a predetermined position of a color proof forming apparatus, and then developing the colored photosensitive film on a pin bar set in the vicinity thereof. Without any need to remove the pin bar during operation. Also, the PET base which is the support sheet for each colored photosensitive film and image receiving sheet (image receiving paper) has been It is possible to automatically remove and collect without having to carefully peel off, and with just simple and reliable operation and without skill, anyone can obtain a high-performance transfer-free color proof It can be created efficiently.

[Brief description of the drawings]

FIG. 1 is a structural view of one embodiment of a colored photosensitive film used in the apparatus of the present invention. FIG. 2 (a) is a perspective view showing the exposure action of the film. FIG. 2B is a perspective view showing the developed film. FIG. 3A is a perspective view showing a transfer operation. FIG. 3 (b) is a perspective view showing a color proof created after four transfers. FIG. 4 is a side sectional view of an embodiment of a color proof creating device including the image transfer device of the present invention. FIG. 5 is a front sectional view thereof. FIG. 6 is a partial sectional view of a heating press roller portion. 7 (a), (b) and (c) are cross-sectional views of a sheet positioning portion. FIG. 8 is a plan view of a sheet positioning unit. FIG. 9A is a cross-sectional view of a peeling plate operating portion. FIG. 9 (b) is a plan view of a peeling plate operating portion. FIG. 9 (c) is a cross-sectional view of a peeling plate operating portion provided on the transfer heating plate. FIGS. 10 (a), (b) and (c) are perspective views showing the layer structure, exposure and development of a conventional colored photosensitive sheet, respectively. FIG. 11A is a front view of a transfer machine showing a conventional means for superimposing a colored photosensitive sheet and an image receiving sheet. FIG. 11 (b) is a perspective view of a reinforcing plate with a cover sheet. FIG. 11 (c) is a sectional view of a reinforcing plate with a cover sheet. 100 transfer section, 101 body frame 102 transfer heating drum, 103, 133 bearing 102A transfer heating plate 104, 105 chain wheel 106 chain, 107 drive motor 108 press roller 109 … Roller compression spring 108A… Temporary bonding roller 110… Overlapping position setting section 111… Pull-up spacer 112… Pin bar, 113, 115C… Hinge 113B… Receiving paper holding plate, 115… Release plate 115A… ... Peeling plate rotating shaft, 115B ... Torque spring 119 ... Heat insulating plate, 123 ... Peeling plate opening / closing cam 125 ... Cam follower lever 126 ... Adhesive film, 128,138 ... Heater 132 ... Pressure roller (for heating) Press roller) 139 Slide guide 142 Air cylinder for pressurization 143 Drive motor 144,145 Drive transmission wheel 153 Peeling roller, 154 Transfer roller pair 155 Transfer guide 156 Recovery of support sheet Department

Claims (3)

(57) [Claims] 1. A transfer heating surface body, and a loading portion having a means for fixing an image receiving sheet on the transfer heating surface body and a pin bar for positioning and mounting an image sheet are provided, and a pressure roller is interposed between the two sheets. After the image of the image sheet is transferred to the image receiving sheet by applying pressure to the transfer heating surface, the leading end of the transferred image sheet is flipped up by a release plate provided in the loading section, and flipped up. The image transfer apparatus is characterized in that the leading end portion is inserted into a peeling roller, and the image sheet is peeled and recovered from a state of close contact with the image receiving sheet on the transfer heating surface member. 2. An image transfer apparatus according to claim 1, wherein said transfer heating surface member is a transfer heating drum. 3. The image transfer apparatus according to claim 2, wherein said transfer heating surface member is a transfer heating plate.