JPH06332157A - Plate making device - Google Patents

Abstract

PURPOSE:To provide a plate making device adopting a new image forming method and selectively executing both of a direct plate making action and a normal plate making action by contact exposure. CONSTITUTION:This device is mainly constituted of a photosensitive sheet exposure part A, a cover sheet peeling part B, a pressure lamination part C, a photosensitive sheet peeling part D, a heating and pressure lamination part E and a color-material sheet peeling part F. At the exposure part A, both the direct plate making action and the normal plate making action by contact exposure are selected. By image exposure, stickiness between the exposed part and the unexposed part of the photosensitive stickiness control layer of a photosensitive sheet (a) is changed. Then, pressure processing is executed by superposing the photosensitive stickiness control layer of the sheet (a) on the color- material layer of a color-material sheet (b). By peeling the sheet (a) thereafter, a color-material image is formed on the color-material layer side of the sheet (b) and transferred on an image receiving sheet (c) by pressure and heating processing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-making apparatus, and more particularly, to an image forming method utilizing a photopolymerizable pressure-sensitive adhesive layer, which is an image formed by a sensitizing dye contained in the photopolymerizable pressure-sensitive adhesive layer. The present invention relates to a plate making apparatus capable of performing both a direct plate making and a normal contact exposure plate making by adopting a novel image forming method which is not affected by the above.

[0002]

2. Description of the Related Art Conventionally, in the printing industry, proof printing or prepress proofing has been used as a means for confirming the finish, color tone, etc. of printed matter before printing. In particular, the prepress proof has an advantage that the finished product can be predicted without using ink.

In recent years, with the development of laser devices and computer image forming technology, digital data of an image is produced by a computer without using a silver salt film, and is directly controlled by light controlled by a color separated digital image signal. An image forming method for obtaining an image (prepress proof) by exposure is being developed. Since such an image forming method does not require a developing step, it enables direct plate making in which the steps are shortened, the labor is saved, and the cost is reduced.

As the above-mentioned image forming method, for example, in JP-A-63-41847, a photosensitive sheet obtained by laminating a photopolymerizable adhesive layer on an image receiving sheet is used, and an image is formed on the photopolymerizable adhesive layer. A method of forming is disclosed. That is, first, after the photosensitive sheet is imagewise exposed, it is brought into contact with a non-photosensitive coloring material sheet containing a toner, and then the coloring material sheet is peeled off from the photosensitive sheet, whereby An image is formed on the photopolymerizable pressure-sensitive adhesive layer by selectively adhering the coloring material sheet to the image-shaped pressure-sensitive adhesive portion.

However, the above-mentioned image forming method has the following drawbacks because it is a method of forming an image on the photopolymerizable pressure-sensitive adhesive layer laminated on the image receiving sheet. That is, due to the sensitizing dye contained in the photopolymerization initiation system in the photopolymerizable pressure-sensitive adhesive layer, the image obtained together with the non-image portion is colored, and it is difficult to reproduce a color tone very similar to that of the printed matter, This is even more difficult when a photopolymerization initiation system that is sensitive to light is used. On the other hand, when the concentration of the sensitizing dye is reduced to reduce the coloring, the sensitivity is lowered.

The present inventor has previously proposed a novel image forming method using a photopolymerizable pressure-sensitive adhesive layer, in which the image is not affected by the sensitizing dye contained in the photopolymerizable pressure-sensitive adhesive layer. Provided a forming method (Japanese Patent Application No. 4-250130, 4
-290436 and 5-1159). Such an image forming method is expected as a method capable of practical direct plate making because it does not cause coloring of an image by a sensitizing dye and is excellent in color reproducibility and gives a colored image with high sensitivity.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming method utilizing a photopolymerizable pressure-sensitive adhesive layer, in which the image is influenced by a sensitizing dye contained in the photopolymerizable pressure-sensitive adhesive layer. It is an object of the present invention to provide a plate making apparatus capable of performing both direct plate making and ordinary contact exposure plate making by adopting a novel image forming method which does not exist.

[0008]

That is, the gist of the present invention is that a photosensitive adhesion control layer (a ₂ ) and a cover sheet (a ₃ ) are sequentially laminated on a support (a ₁ ). By using a photosensitive sheet (a), a color material sheet (b) formed by laminating a color material layer (b ₂ ) on a support (b ₁ ), and an image receiving sheet (c), by image exposure, photosensitive photosensitive adhesive control layer of the sheet (a) (a ₂₎ to change the adhesion between the exposed portions and unexposed portions of the colorant and the photosensitive adhesive control layer of the photosensitive sheet (a) (a ₂₎ The color material layer (b ₂ ) of the sheet (b) is superposed and subjected to pressure or pressure heat treatment, and then the photosensitive sheet (a) is peeled off to obtain the color material layer ((b) of the color material sheet (b). b ₂₎ side a colorant image is formed on, then the hot process is a direct plate-making apparatus for transferring a colorant image to a receiving sheet (c) I: Housing (1) and photosensitive sheet exposure section (A) provided inside thereof, cover sheet peeling section (B), pressure laminating section (C), photosensitive sheet peeling section (D), heating Pressure laminating section (E) and color material sheet peeling section (F)
And (A) to (F), a sheet transport mechanism that sequentially transports sheets, and a control unit (G) that operates them. IIA: Photosensitive sheet exposure unit (A) Sheet feeding mechanism (10), silver salt film feeding mechanism for image-making plate making (13), photosensitive sheet supporting mechanism (11), laser controlled by light of constant intensity or color-separated digital image signal Is provided with an exposure mechanism (12) and an exposure mechanism switching device (129), and from the photosensitive sheet feeding mechanism (10) and the silver salt film feeding mechanism (13) for image forming plate making to the photosensitive sheet supporting mechanism ( A first exposure function of performing exposure by irradiating the silver salt film (e) for image formation which has been fed to 11) and is laminated and fixed on the photosensitive sheet (a) with light of a constant intensity. , And the photosensitive sheet feeding mechanism (10 Has a second exposure function of irradiating the photosensitive sheet (a), which is fed to the photosensitive sheet supporting mechanism (11) and is fixed, with a laser, and these two exposure functions are , The exposure mechanism switching device (129), and IIB: the cover sheet peeling section (B) is the peeling mechanism (20).
A photosensitive sheet (a), which is provided with an image forming silver salt film (e) and which has been transferred from the photosensitive sheet exposure section (A) and is laminated to the image forming plate, is fed to a peeling mechanism (20). First peeling function for peeling off the silver salt film (e) for use from the cover sheet (a ₃ ) of the photosensitive sheet (a), and
Photosensitive sheet The photosensitive sheet (a) transferred from the exposure section (A) is fed to the peeling mechanism (20) to cover the cover sheet (a).
₃ ) has a second peeling function of peeling, and these two peeling functions are switched according to the above-mentioned two exposure functions, and IIC: pressure laminating section (C) is a pressure roller (3).
0) and a color material sheet feeding mechanism (31), the sheet is transferred from the cover sheet peeling section (B) and the cover sheet (a ₃ ).
The photosensitive sheet (a) and the color material sheet (b) fed from the color material sheet feeding mechanism (31) are peeled off to form a photosensitive adhesive control layer (a ₂ ) and a color material layer (b ₂ ). Has a function of feeding to a pressure roller (30) so as to overlap with and performing pressure or pressure heat treatment, and IID: the photosensitive sheet peeling section (D) includes a photosensitive sheet peeling mechanism (40). , Having a function of peeling the photosensitive sheet (a) from the laminate of the photosensitive sheet (a) and the color material sheet (b) transferred from the pressure laminating unit (C), IIE: heat and pressure laminating The section (E) includes a heating / pressurizing roller (50) and an image receiving sheet feeding mechanism (51), and is transferred from the photosensitive sheet peeling section (D) and has a color material sheet (b) on which a color material image is formed. ) And the image receiving sheet feeding mechanism (5
1) The image receiving sheet (c) fed from 1) is fed to the heating and pressing roller (50) so that the image forming surface of the color material image forming surface of the color material sheet (b) and the image receiving sheet (c) are overlapped and heated. It has a function of transferring a color material image to the image receiving sheet (c) by pressing, and IIF: the color material sheet peeling section (F) includes a color material sheet peeling mechanism (60), and a heating and pressurizing laminating section (E). ), And feeds the image receiving sheet (c) on which the color material sheet (b) is laminated to the color material sheet peeling mechanism (60) to peel the color material sheet (b) from the image receiving sheet (c). IIG: The control unit (G) is a direct plate making apparatus characterized by being operated so that the above-mentioned respective functions are sequentially performed.

[0009]

EXAMPLES Examples of the plate making apparatus of the present invention will be described below. Prior to that, an outline of an image forming method in the plate making apparatus of the present invention will be described first. 6 to 9 are explanatory views of the image forming method in the plate making apparatus of the present invention. FIGS. 6 and 7 show a negative type aspect, and FIGS. 8 and 9 show a positive type aspect. In the figure, (a) is a photosensitive sheet, (a ₁ ) is a support,
(A ₂ ) is a photosensitive adhesion control layer, (a ₃ ) is a cover sheet, (b) is a color material sheet, (b ₁ ) is a support, and (b ₂ )
Is a color material layer, (b ₃ ) is a heat softening layer, and (c) is an image receiving sheet.

The image forming method in the plate making apparatus of the present invention is a photosensitive sheet comprising a support (a ₁ ) and a photosensitive adhesion control layer (a ₂ ) and a cover sheet (a ₃ ) which are sequentially laminated on the support (a ₁ ). (A), a color material sheet (b) formed by laminating a color material layer (b ₂ ) on a support (b ₁ ), and an image receiving sheet (c). photosensitive adhesive control layer (a) (a ₂₎ to change the adhesion between the exposed portions and unexposed portions of the photosensitive adhesive control layer of the photosensitive sheet (a) (a ₂₎ and colorant sheet (b color material layer) (b ₂₎ and after performing pressure or hot process by superimposing, by peeling the photosensitive sheet (a), the colorant layer of the colorant sheet (b) (b ₂₎ A color material image is formed on the side, and then the color material image is transferred to the image receiving sheet (c) by pressure heat treatment.

In the negative embodiment shown in FIGS. 6 and 7,
As the photosensitive adhesive control layer (a ₂ ), for example, a photopolymerizable adhesive layer (a ₂₁ ) is used. And the following (1)-
A negative image is formed according to the step (5).

(1) By imagewise exposure, the tackiness of the exposed part of the photosensitive tackiness control layer (a ₂ ) (photopolymerizable tackiness layer (a ₂₁ )) of the photosensitive sheet (a) is reduced (FIG. 6).
(1)). (2) The cover sheet (a ₃ ) is peeled off, and the photosensitive adhesive control layer (a ₂ ) of the photosensitive sheet (a) and the color material sheet (b) are removed.
The color material layer (b ₂ ) is overlapped and subjected to pressure or pressure heat treatment (FIG. 6 (2)).

(3) By peeling off the photosensitive sheet (a), the color material layer (b ₂ ) is transferred to the unexposed area of the photosensitive adhesion control layer (a ₂ ) to form an image corresponding to the exposed area. The color material layer (b ₂ ) of the color material sheet (b) is allowed to remain on the color material sheet (b).
A negative type color material image is formed on the side (FIG. 6C).

(4) The image corresponding to the exposed portion on the color material sheet (b) is formed by superposing the image receiving sheet (c) and the color material image forming surface of the color material sheet (b) on each other and applying heat and pressure. The image is transferred to the image receiving sheet (c) (FIG. 7 (4)). (5) The color material sheet (b) is peeled from the image receiving sheet (c) (((5) in FIG. 7)).

In the positive mode shown in FIGS. 8 and 9,
As the photosensitive adhesion control layer (a ₂ ), for example, a _double layer of a photopolymerization layer (a ₂₁ ) and an adhesion layer (a ₂₂ ) laminated thereunder is used. Then, a positive image is formed according to the following steps (1) to (6).

(1) Photopolymerization layer (a ₂₁ ) of the photosensitive adhesion control layer (a ₂ ) of the photosensitive sheet (a) by imagewise exposure.
The adhesiveness of the exposed part of the is reduced (FIG. 8 (1)). As a result, the pressure-sensitive adhesive layer (a ₂₂ ) and the photopolymerizable layer (a ₂₁ ) were the same in the layer structure of the pressure-sensitive adhesive layer (a ₂₂ ) / photopolymerizable layer (a ₂₁ ) / cover sheet (a ₃ ). a ₂₁ ) changes the adhesiveness between the respective layers by exposure, and after the exposure, the adhesiveness between the adhesive layer (a ₂₂ ) and the photopolymerizable layer (a ₂₁ ) is changed to the photopolymerizable layer (a ₂₁ ) and the cover sheet. It becomes smaller than the adhesiveness with (a ₃ ).

(2) After exposure, the cover sheet (a ₃ ) is peeled off. As a result, the adhesiveness between the adhesive layer (a ₂₂ ) and the photopolymerization layer (a ₂₁ ) in the exposed area is reduced,
The photopolymerized layer (a ₂₁ ) in the exposed area is peeled off from the adhesive layer (a ₂₂ ) together with the cover sheet (a ₃ ) to form an adhesive layer (a ₂₁ ).
₂₂ ) is exposed (Fig. 8 (2)).

(3) The photosensitive adhesive control layer (a ₂ ) on which the adhesive layer (a ₂₂ ) of the photosensitive sheet (a) is exposed and the color material layer (b ₂ ) of the color material sheet (b) are superposed. To apply pressure or heat treatment (FIG. 8C). As a result, the coloring material layer (b ₂ ) is adhered to the exposed portion (corresponding to the exposed portion) of the photosensitive adhesive control layer (a ₂ ).

(4) By peeling off the photosensitive sheet (a), the color material layer (b ₂ ) is transferred to the adhesive layer exposed portion of the photosensitive adhesive control layer (a ₂ ) and corresponds to the unexposed portion. The image is left on the color material sheet (b), and a positive type color material image is formed on the color material layer (b ₂ ) side of the color material sheet (b) (FIG. 9).
(4)).

(5) An image corresponding to the unexposed portion on the color material sheet (b) is obtained by superposing the image receiving sheet (c) and the color material image forming surface of the color material sheet (b) on each other and applying heat and pressure. Is transferred to the image receiving sheet (c) (FIG. 9 (5)). (6) The color material sheet (b) is peeled from the image receiving sheet (c) ((FIG. 9 (6)).

Next, the photosensitive sheet (a) will be described. Examples of the support (a ₁ ) include papers such as high-quality paper, art paper, and release paper, sheets of metal or alloy such as aluminum, polymer sheets such as polyethylene terephthalate, and the like. The thickness of the support (a ₁ ) is usually 1 μm.
It is in the range of m to 10 mm, preferably 5 μm to 1 mm.

The photopolymerizable composition for forming the photopolymerizable pressure-sensitive adhesive layer (a ₂₁ ) in the negative type embodiment comprises a photopolymerization initiation system comprising a sensitizing dye and an activator and at least one ethylenically unsaturated double bond. And an addition-polymerizable compound (hereinafter abbreviated as an ethylenic compound) contained therein. The ethylenic compound in the photopolymerizable composition cures in response to light such as ultraviolet or visible laser light to moderately reduce the tackiness of the exposed portion of the photopolymerizable pressure-sensitive adhesive layer (a ₂₁ ). You can Further, the tackiness may be adjusted by further adding an organic polymer substance to the photopolymerizable composition.

The above-mentioned photopolymerization initiation system is appropriately selected and used according to the light wavelength of the light source.
No. 9, which discloses a tetrahydroquinoline sensitizer and an activator (2,2-bis (o-chlorophenyl) -4,4 ′,
A photopolymerization initiation system composed of 5,5'-tetraphenylbiimidazole, 2-mercaptobenzthiazole, etc.) is preferable.

Examples of the above-mentioned ethylenic compounds and organic polymer substances include, for example, JP-A-2-69 and JP-A-51.
-150322, JP-A-55-26597, and JP-A-55-26596 can be appropriately selected from those described in the respective publications. In particular, an ethylenic compound having a low viscosity (for example, 50 cp or less at room temperature) and a glass transition point of 8
An organic polymer substance having a temperature of 0 ° C. or lower, preferably 50 ° C. or lower is suitably used. As a typical ethylenic compound,
Examples thereof include trimethylol-propane triacrylate, and typical organic polymer substances include (meth) acrylic acid copolymers and alkyl (meth) acrylate copolymers.

The amount of the photopolymerization initiation system used is in the range of 0.1 to 100 parts by weight, preferably 0.2 to 50 parts by weight, relative to 100 parts by weight of the ethylenic compound. The amount of the organic polymer used is 1 to 5 with respect to 100 parts by weight of the ethylenic compound.
It is in the range of 00 parts by weight, preferably 10 to 300 parts by weight. The thickness of the photopolymerizable pressure-sensitive adhesive layer (a ₂₁ ) is usually 0.1 to 5
The range is 0 μm, preferably 0.2 to 20 μm, and more preferably 0.3 to 10 μm.

As the pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer (a ₂₂ ) in the positive type mode, a pressure-sensitive adhesive having a pressure-sensitive adhesive property at room temperature is suitable. Such an adhesive is disclosed, for example, in JP-A-51-15.
0322, JP-A-55-26596, JP-A-55-
It can be appropriately selected from the polymer substances used for the toning material described in each publication of No. 26597. As the polymer substance, a polymer substance having a softening point of usually 80 ° C. or lower, preferably 60 ° C. or lower is suitable, and representative examples of the polymer substance include cis-polybutadiene and styrene-butadiene copolymer. To be

The adhesive layer (a ₂₂ ) may contain a plasticizer such as dioctyl phthalate, didodecyl phthalate and triethylene glycol dicaprylate in order to control the adhesiveness. On the other hand, the photopolymerizable layer (a ₂₁ ) is composed of the same photopolymerizable composition as in the above negative type embodiment.

The adhesive layer (a ₂₂ ) and the photopolymerization layer (a ₂₁ ) are
Adhesive layer (a ₂₂ ) / photopolymerization layer (a ₂₁ ) / cover sheet (a
_{In the} layer structure consisting of ₃ ), the photopolymerization layer (a ₂₁ ) is designed so that the adhesion between the layers is changed by exposure. That is, after the exposure, the adhesiveness between the adhesive layer (a ₂₂ ) and the photopolymerizable layer (a ₂₁ ) is determined to be the same as that in the negative-type embodiment as compared with the photopolymerizable layer (a ₂₁ ). Cover sheet (a ₃ )
It is designed to be less than the adhesion between and. The thickness of the adhesive layer (a ₂₂ ) is usually in the range of 0.1 μm to 1 mm, preferably 0.5 to 200 μm, and the thickness of the photopolymerizable layer (a ₂₁ ) is the same as in the negative type embodiment. It is selected from a similar range.

The cover sheet (a ₃ ) is used in order to prevent deterioration of sensitivity of the photosensitive adhesive control layer (a ₂ ) due to oxygen and improve storage stability. And the type is
It is not particularly limited as long as it can be easily peeled from the photosensitive adhesion control layer (a ₂ ), and examples thereof include polyesters such as polyethylene terephthalate, polyamides, polycarbonates,
Examples thereof include polyolefins such as polyether, polyacetal and polypropylene, transparent plastic sheets such as cellulose ester and polyvinyl alcohol. The thickness of the cover sheet (a ₃ ) is usually 0.1 to 500 μm,
It is preferably in the range of 0.5 to 300 μm.

The cover sheet (a ₃ ) may be provided with a release layer in order to enhance the releasability from the photosensitive adhesion control layer (a ₂ ). The release layer on the photosensitive sheet is peeled off from the photosensitive sheet (a) together with the cover sheet (a ₃ ) after image exposure. Examples of the material for the release layer include silicone resin, fluororesin, polyamine, styrene-maleic anhydride copolymer, polyvinyl chloride, polyvinyl alcohol,
Examples thereof include polyvinyl acetate and copolymers thereof, and further, cellulose triacetate, cellulose diacetate and the like. The thickness of the release layer is usually in the range of 0.1 to 100 μm, preferably 0.2 to 50 μm.

Next, the color material sheet (b) will be described. The color material sheet (b) is formed by laminating the color material layer (b ₂ ) on the support (b ₁ ). Support (b ₁₎ is able to use the same material as the support of the photosensitive sheet (a) (a _1), also its thickness is also selected from the same range.

The support (b ₁ ) is preferably provided with a heat softening layer (b ₃ ). The heat-softening layer (b ₃ ) deforms the color material image while following the unevenness of the surface of the image receiving sheet (c) when pressure-transferring the color material image formed thereon onto the image receiving sheet (c). It has a function of pressing against the image receiving sheet (c), and exhibits an effect of improving the transferability by increasing the adhesion between the color material color image and the image receiving sheet (c). When the color material sheet (b) having the heat-softening layer (b ₃ ) is used, the color material image surface transferred onto the image receiving sheet has the same shape as the unevenness on the surface of the image receiving sheet (c). Further, it has a gloss (texture) equivalent to that of the image receiving sheet (c), and excessive gloss is suppressed, so that a transfer image closer to a printed matter can be obtained.

The heat-softening layer (b ₃ ) is made of a material which does not move to the image-receiving sheet (c) side together with the color material color image at the time of pressure heat transfer, and the material has a softening point of about 80 ° C. or less. It is preferable to use polymeric substances. Examples of such organic polymer substances include those described in J. BRANDRUP, E.I. H. IM
MERGUT "Polymer Handbook" s
second edition (John Wiley
& Sons publication).

Specific examples of the above organic polymer substances include:
Acrylic esters such as ionomer resins, ethylene-ethyl acrylate copolymer resins, polypropylene resins, and copolymers of acrylic acid esters and vinyl acetate, in which ethylene- (meth) acrylic acid copolymers are intermolecularly crosslinked with metal ions. Examples thereof include copolymers and vinyl acetate copolymers, and among these, polypropylene resin, ethylene-ethyl acrylate copolymer resin having an ethyl acrylate content of 5 to 50% by weight, and ethylene-vinyl acetate copolymer are particularly preferable. . The thickness of the heat softening layer (b ₃ ) is usually 1 to
The range is 100 μm, preferably 5 to 50 μm.

[0035] As a method of providing a support (b ₁₎ in heat-softening layer (b _3), for example, a method of drying after the organic polymer material is coated on the support by dissolving in a solvent (b _1), A method of extruding an organic polymer substance into a film on the support (b ₁ ) by an extruder and laminating it (extrusion laminating method) or the like can be adopted.

The heat-softening layer (b ₃ ) may be provided with a releasing layer in order to improve transferability of the color material image to the image receiving sheet (c). When the organic polymer substance is not contained in the coloring material layer (b ₂ ) described later, the release of the coloring material layer makes it possible to transfer the coloring material layer to the image receiving sheet. The release layer provided on the heat softening layer (b ₃ ) is transferred to the image receiving sheet (c) together with the color material image. As the release layer, the same material as that of the release layer of the photosensitive sheet (a) can be used, and the thickness thereof is also selected from the same range.

The color material layer (b ₂ ) contains a coloring material. A dye or pigment is used as the coloring material. For the purpose of color proofing, a dye / pigment having a color tone matching yellow, magenta, cyan, and black is required, but in addition to this, metal powder, white pigment, fluorescent pigment, and the like can also be used.

Specific examples of the dyes and pigments include lionol yellow GRO (21090) and lionol red 7B44.
01 (15850), Lionol Blue SM (2615
0), "Mitsubishi Carbon Black MA-10" manufactured by Mitsubishi Kasei.
0 ”,“ Mitsubishi Carbon Black # 40 ”manufactured by the same company, Seika First Yellow H (07555), Seika First Carmine (1483), Cyanine Blue (492
0) (the number in () above means the color index (C.I)).

The color material layer (b ₂ ) usually contains an organic polymer substance together with a coloring material. The organic polymer substance has a function of enhancing the coating property of the coloring material and producing an adhesive property necessary for pressure heat transfer. Examples of types of organic polymer substances include, for example, JP-A-48-31323 and JP-A-51-
150322, JP 55-26596, JP 5
No. 5,265,971, JP-A-63-41847, JP-A-2-69, US Pat. Nos. 2,760,863 and 2,791,504. A molecular substance can be used as appropriate. The content of the coloring material in the color material layer (b ₂ ) is usually 1 to 50% by weight, preferably 2 to 30% by weight, and the content of the organic polymer is usually 1 to 98% by weight, preferably Is 5 to 90
It is in the range of% by weight.

Next, the image receiving sheet (c) will be described. The image receiving sheet (c) may be a final image receiving sheet or an intermediate image receiving sheet when the color material image formed on the image receiving sheet (c) is transferred to the final image receiving sheet again by pressure heat treatment. Good. The types of final image receiving sheet are
For example, various printing papers such as art paper and coated paper, plastic films such as polyester film, and metal sheets such as aluminum can be appropriately selected according to the purpose.

The intermediate image-receiving sheet can be selected from a wide range of types in the same manner as described above, but at least its surface has the property of receiving the color-material image on the color-material sheet (b), and the transferred color-material image is It is also necessary to have the property of being able to be transferred to the final image receiving sheet. Therefore, the surface texture of the intermediate image-receiving sheet may be selected in correlation with the above transfer conditions.
For example, when the transfer conditions are almost the same, the adhesiveness to the color material layer (b ₂ ) on the color material sheet (b) is better than that to the support (b ₁ ) of the color material layer (b ₂ ). Strong,
It is necessary to make the adhesion of the color material layer (b ₂ ) to the surface of the final image receiving sheet weaker.

For example, when the support (b ₁ ) of the color material sheet (b), the intermediate image-receiving sheet and the final image-receiving sheet are all made of a polymer substance, their glass transition points are the final image-receiving sheet, Intermediate image-receiving sheet, support (b ₁ )
It may be selected so as to increase in the order of. Then, under a certain condition, even if the adhesive order is not maintained,
It suffices that the order of adhesion is maintained in consideration of each transfer condition, and further, the color material layer (b ₂ ) adhered to the intermediate image-receiving sheet and the final image-receiving sheet is different due to the front and back relationship. Therefore, the above-mentioned adhesiveness order may be maintained by providing a difference between the front surface and the back surface of the color material layer (b ₂ ).

The surface properties of the intermediate image-receiving sheet as described above are
It may be realized only by the substrate, or may be realized by the substrate and at least one coating layer. For example, as mentioned above,
A coating layer of a polymeric substance may be provided on the sheet-shaped substrate. Further, a buffer layer and / or a release layer can be provided separately from or on such a coating layer. The buffer layer is effective in receiving and receiving the color material image and transferring the color material image to the final image-receiving sheet, in that all the necessary images can be reliably transferred even if the surface of the other party is rough. Such a buffer layer may be made of a viscoelastic material or a polymer substance having a property of being softened appropriately under transfer conditions.

The release layer is also used for maintaining the order of adhesiveness when it is difficult to maintain the order of adhesiveness only by the surface texture of the intermediate image-receiving sheet. Such sequential holding of the adhesiveness may be realized by the adhesiveness (peelability) between the coloring material layer (b ₂ ) and the surface of the release layer, and the adhesiveness (peelability) between the release layer and its lower layer. ). In the latter case, in the above adhesive sequence, the adhesiveness of the intermediate image-receiving sheet is based on the adhesiveness between the release layer of the intermediate image-receiving sheet and its lower layer in comparison with the final image-receiving sheet, and the coloring material is also used. In comparison with the support (b ₁ ) of the sheet (b), both the adhesiveness between these layers and the adhesiveness of the surface are taken into consideration.

When an intermediate image-receiving sheet provided with a buffer layer is used, a color-material image matching the irregularities of the permanent image-receiving sheet is formed on each color-material sheet without providing a buffer layer on each color-material sheet. It becomes possible. Further, when a release layer is provided on each color material sheet to form a color material image, four release layers are transferred onto the permanent image-receiving sheet.
If an intermediate image-receiving sheet provided with a release layer is used, only one release layer is transferred onto the permanent image-receiving sheet, so that excessive gloss can be suppressed and an image closer to a printed matter can be formed. .

Next, a description will be given of an example of producing the typical photosensitive sheet (a) and color material sheet (b) used in the plate making apparatus of the present invention.

The photosensitive sheet (a) of the negative type is, for example, a 75 μm polyethylene terephthalate sheet (hereinafter abbreviated as PET sheet) and a coating solution for the photopolymerizable pressure-sensitive adhesive layer having the composition shown in Table 1. A dry film thickness of 4 μm is applied and dried, and a 20 μm-thick polypropylene film is provided thereon, and at room temperature, 5 kg / cm ² , 50 cm.
It can be created by performing a pressure roll process of 1 / min.

[0048]

[Table 1] Coating solvent: methyl lactate / methyl ethyl ketone / tetrahydrofuran (2: 2: 1 weight ratio) 80 g Ethylenic compound: trimethylolpropane triacrylate 0.5 g Polymer organic substance: Polymethylmethacrylate / methacrylic acid co-weight Combined (90/10 weight ratio, Mw: 50,000) 5g Activator (1): 2,2'-bis (o-chlorophenyl) -4,4 ', 5,5'-tetraphenylbiimidazole 2g Activator (2): 2-mercaptobenzthiazole 0.5 g Sensitizing dye: compound described in the following chemical formula 0.1 g

[0049]

[Chemical 1]

The positive type photosensitive sheet (a) is prepared, for example, by applying a coating solution for a photopolymerizable pressure-sensitive adhesive layer having the composition shown in Table 1 above onto a PET sheet similar to the above to have a dry film thickness of 4 μm. And then dried on the same PET sheet as above, but with 3.6 parts by weight of polybutadiene and styrene-
2.4 parts by weight of butadiene copolymer, methylene chloride 5
4 parts by weight of the adhesive layer coating liquid was applied to a dry film thickness of 6 μm and dried, and both PET sheets were aligned so that their coating surfaces would overlap with each other, and the same pressure roll treatment as above was performed. It can be created by doing.

The color material sheet (b) is the same PET as described above.
A 20 μm heat-softening layer (ethylene-vinyl acetate copolymer resin) was provided on the sheet by an extrusion laminating method, and then a coloring material layer shown in Table 2 was prepared by dispersion treatment for each coloring material. It can be prepared by coating the coating solution for use so that the dry film thickness becomes 2 μm and drying.

[0052]

[Table 2] Polymer (A): "SFC-3" manufactured by Dainippon Ink and Chemicals, Inc.
00 "40 wt% aqueous solution 50 parts by weight Polymer substance (B):" AT-1000 "manufactured by Showa Polymer Co., Ltd.
242 parts by weight of 50% by weight aqueous solution Polymer (C): Polyethylene oxide (MW2 ×)
10 ⁶ ) 330 parts by weight of 1% by weight aqueous solution Surfactant (A): 6 parts by weight of "Emulgen" manufactured by Kao Co., Ltd. Surfactant (B): 4 parts by weight of sodium lauryl sulfate <Pigment> Yellow sheet: Sakerfast Yellow H07
55 (manufactured by Dainichi Seika) 40 parts by weight Cyan sheet: Cyanine blue 4920 (manufactured by Dainichi Seika) 42 parts by weight Magenta sheet: Saker Farst Carmin 148
3 (manufactured by Dainichiseika Co., Ltd.) 35 parts by weight Black sheet: "Mitsubishi Carbon Black M-10
0 "(manufactured by Mitsubishi Kasei) 45 parts by weight

Next, an embodiment of the plate making apparatus of the present invention will be described with reference to the attached drawings. FIG. 1 is a conceptual diagram of the device of the present invention, and FIGS. 2 to 4 are partial explanatory diagrams of the device of the present invention. In each of these, only main components are shown. Also, FIG.
FIG. 4 is an explanatory diagram of an exposure mechanism of the device of the present invention.

The plate making apparatus of the present invention comprises a housing (1)
And a photosensitive sheet exposure unit (A) provided therein,
Cover sheet peeling section (B), pressure laminating section (C),
A photosensitive sheet peeling section (D), a heat and pressure laminating section (E), and a color material sheet peeling section (F), and (A) to (F).
It is mainly composed of a sheet transfer mechanism for sequentially transferring the sheets to the respective parts and a control part (G) for operating these.

The sheet transfer mechanism for sequentially transferring the sheet to each of the above (A) to (F) comprises a roller (2) and a guide (3). In the drawings, rollers and guides without symbols represent rollers and guides of the sheet transfer mechanism.

The photosensitive sheet exposing section (A) includes a photosensitive sheet feeding mechanism (10), a silver salt film feeding mechanism (13) for image-making plate making, a photosensitive sheet supporting mechanism (11), and a constant strength. The photosensitive sheet feeding mechanism (1) is provided with an exposure mechanism (12) using a laser controlled by light or color-separated digital image signals and an exposure mechanism switch (129).
0) and a silver salt film feeding mechanism (1) for plate making after image formation
3) The silver salt film (e) for image formation which has been fed from the photosensitive sheet supporting mechanism (11) and is laminated and fixed on the photosensitive sheet (a) is irradiated with light of a constant intensity. And a first exposure function of performing exposure by irradiating a laser on the photosensitive sheet (a) fixed and fed from the photosensitive sheet feeding mechanism (10) to the photosensitive sheet supporting mechanism (11). It has a second exposure function of performing exposure.

The photosensitive sheet feeding mechanism (10) includes a winding roll (101) for the photosensitive sheet (a), a feeding roller (102), a cutting mechanism (103), and a guide roller (10).
4). The image-formed plate-making silver salt film feeding mechanism (13) is composed of an image-formed plate-making silver salt film supply unit (131), a feed roller (132), and guide rollers (133) and (134). . Each of these rollers is provided with a silver salt film supply unit (13
It is arranged along the feeding path of the image-formed plate-making silver salt film from 1) to a photosensitive sheet support mechanism (11) described later. Receptacle for silver salt film for plate making (135)
In the illustrated example, is provided on the hanging (1) of the photosensitive sheet exposure section (A), but it may be provided at another place.

The photosensitive sheet support mechanism (11) comprises a rotary drum (111) and a vacuum mechanism (not shown) for closely fixing the photosensitive sheet (a) to the surface of the drum. The vacuum mechanism exerts a vacuum action on the surface of the rotating drum (111) through a large number of minute holes provided in the rotating drum (111) to fix the photosensitive sheet (a) to the surface of the rotating drum (111) in close contact.

The pressing roller (112) is arranged between the guide roller (104) and the rotating drum (111) so as to be close to the rotating drum (111), and the photosensitive sheet (a) is attached to the rotating drum (111). ) Has a function of contacting. The peeling roller (113) is a rotating drum (1
11) and the roller (2) of the sheet transfer mechanism are arranged so as to be close to the rotating drum (111),
It has a function of peeling off the photosensitive sheet (a) that is tightly fixed to the rotating drum (111). Pressing roller (11
2) is rotated in the opposite direction to the rotating drum (111), and the peeling roller (113) is rotated in the same direction as the rotating drum (111). Each of these rollers is provided as needed when the photosensitive sheet support mechanism (11) is composed of a rotating drum (111). Further, at a position below the peeling roller (113), the rotary drum (1
A guide roller (114) disposed in close proximity to (11) rotates the image-formed plate-forming silver salt film (e) fed from the image-formed plate-making silver salt film feeding mechanism (13) on a rotating drum (111). Has the function of leading to the surface of.

As the exposure mechanism (12), a laser controlled by a constant intensity light or a color-separated digital image signal is used. The constant intensity light and the laser are switched to either one by the switch (129) of the exposure mechanism. As shown in FIG. 5, the exposure mechanism (12) in the case of a laser has an optical oscillator (121), a beam compressor (122), an ultrasonic optical modulator (123), a beam expander (124), a cylinder lens (125). ), Polygon mirror (126), toroidal lens (127), f
It is composed of a -θ lens (128).

As a light source of constant intensity light, besides a laser, a high pressure mercury lamp, a sodium lamp, a xenon lamp,
A tungsten lamp or the like can be used. On the other hand, as the laser light source, a light source having an emission spectrum from ultraviolet to visible wavelengths is suitable, and examples thereof include a semiconductor laser, an argon ion laser, a He-Ne laser, and an H laser.
Examples thereof include e-Cd laser. In particular, the argon ion laser and the semiconductor laser are excellent in terms of stability, life, and price.

In the photosensitive sheet exposing section (A), the photosensitive sheet (a) pulled out from the winding roll (101) by the feeding roller (102) is cut by the cutting mechanism (10).
The guide roller (104) is cut to a predetermined length by 3).
And is fed to the rotary drum (111) and fixed in close contact therewith.

Then, when the exposure is performed using light of a constant intensity, the silver salt film for image forming plate (e) sent from the image forming plate for silver salt film feeding mechanism (13) is further supplied. ) Is laminated and fixed on the photosensitive sheet (a). According to the rotation of the rotating drum (111), the silver salt film (e) for image formation which has been wound and fixed on the surface of the rotating drum (111) is subjected to scanning image exposure with light having a constant intensity from the optical oscillator (121). 1 exposure function).

On the other hand, when exposure is performed using a laser, the photosensitive sheet (a) wound and fixed on the surface of the rotary drum (111) is rotated as it is, and the photosensitive sheet (a) is directly subjected to color-separated digital separation. Scanning image exposure is performed by the laser from the optical oscillator (121) controlled by the image signal (first exposure function).

The above-mentioned two exposure functions can be switched together with the exposure mechanism switch (129). The exposure conditions are
For example, the rotation speed of the rotating drum (111) is 765 rpm,
It is possible to adopt the condition that the beam diameter is 7 μm and the scanning pitch is 5 μm. The exposed photosensitive sheet (a) is transferred to the next cover sheet peeling section (B) by the sheet transfer mechanism.

The cover sheet peeling section (B) is provided with a peeling mechanism (20), is transferred from the photosensitive sheet exposing section (A), and is laminated with the image forming silver salt film (e) for plate making. a) is fed to a peeling mechanism (20) to form an image-formed plate-making silver salt film (e) and a photosensitive sheet (a).
First peeling function for peeling off the cover sheet (a ₃ ) of
It also has a second peeling function of feeding the photosensitive sheet (a) transferred from the photosensitive sheet exposing section (A) to the peeling mechanism (20) to peel off the cover sheet (a ₃ ). These peeling functions can be integrated, and in that case,
The image forming silver salt film for platemaking (e) and the cover sheet (a ₃ ) are peeled off at the same time.

In the illustrated example, the above-mentioned two peeling mechanisms are separately provided, and the first peeling function has two suction rollers (201) arranged vertically at a predetermined interval.
And a pinch roller (202), and a former peeling mechanism (20) composed of two suction rollers (203) and a pinch roller (204) arranged in the same manner as the latter peeling mechanism (20). Be done. Then, the silver salt film (e) for plate making after image formation is peeled by the peeling mechanism (20) of the former stage, and the peeling mechanism (2 of the latter stage is used.
0) peels off the cover sheet (a ₃ ). The suction action of each suction roller can be performed by the same vacuum mechanism (not shown) as in the case of the rotary drum (111).

The above two peeling functions are switched in accordance with the above two exposing functions. For example, when the first exposing function is performed in the photosensitive sheet exposing section (A), the preceding peeling mechanism (20) is used. ) Function is stopped. Such stop can be performed by stopping the suction action of the suction roller (201).

In the cover sheet peeling section (B), the silver salt film (e) for image formation which has been image-formed and has been peeled off by the suction action of the suction roller (203) is pulled up by the pinch roller (204) to make the image-formed platemaking. The film is fed to the silver salt film discharge section (22). The cover sheet (a ₃ ) separated by the suction action of the suction roller (201) is pulled up by the pinch roller (202) and fed to the cover sheet discharge section (21). On the other hand, the photosensitive sheet (a) from which the cover sheet (a ₃ ) has been peeled off is transferred to the next pressure laminating section (C) by the sheet transfer mechanism.

The pressure laminating section (C) is equipped with a pressure roller (30) and a coloring material sheet feeding mechanism (31), and is transferred from the cover sheet peeling section (B) and the cover sheet (a).
₃ ) The photosensitive sheet (a) from which the peeling has been performed and the color material sheet (b) fed from the color material sheet feeding mechanism (31) are the photosensitive adhesive control layer (a ₂ ) and the color material layer (b). ₂ ) has a function of feeding to a pressure roller (30) so as to overlap with ( ₂ ) and performing pressure or pressure heat treatment.

The pressure roller (30) is composed of two rollers which are vertically arranged at a predetermined interval, and the color material sheet feeding mechanism (31) includes a color material sheet supply tray (311),
The feeding roller (312) disposed below the coloring material sheet supply tray (311) to the pressure roller (3
The color material sheet feeding rollers (313) to (317) arranged along the color material sheet feeding path (0) and an appropriate guide. Then, the coloring material sheet feeding rollers (313) to (317) reverse the coloring material sheet (b) during feeding so that the coloring material layer (b ₂ ) of the coloring material sheet (c) is a photosensitive sheet ( It is arranged so as to come into contact with the photosensitive adhesive control layer (a ₂ ) of a).

The illustrated color material sheet supply tray (311)
Are arranged vertically in four stages, and the color material sheets (c) for each of the color materials of yellow, magenta, cyan, and black are accommodated in each of them with the color material layer (b ₂ ) as the lower surface. Then, according to the color-separated digital image signal in the photosensitive sheet exposure section (A), the color material sheet (c) corresponding to the color is used each time.

In the pressure laminating section (C), the color material sheet (c) of the color material sheet supply tray (311) is fed by the feeding roller (312) and the color material sheet feeding roller (3).
13) to (317) and then fed to the pressure roller (30) and subjected to pressure or pressure heat treatment together with the photosensitive sheet (a). When the pressure heat treatment is performed by the pressure roller (30), a pressure roller having a heating mechanism inside is used as the pressure roller (30). The laminate of the photosensitive sheet (a) and the color material sheet (b) is transferred to the next photosensitive sheet peeling section (D) by the sheet transfer mechanism.

The photosensitive sheet peeling section (D) has a photosensitive sheet peeling mechanism (40) for separating the photosensitive sheet (a) and the color material sheet (b) transferred from the pressure laminating section (C). It has a function of peeling the photosensitive sheet (a) from the laminate. The photosensitive sheet peeling mechanism (40) includes two suction rollers (401) and a pinch roller (402) which are vertically arranged at a predetermined interval.
The adsorption action of 1) can be performed by a vacuum mechanism (not shown) similar to that of the rotating drum (111).

In the photosensitive sheet peeling section (D), the photosensitive sheet (a) is peeled off by the suction action of the suction roller (201). Then, the peeled photosensitive sheet (a) is pulled down by the pinch roller (402) and fed to the photosensitive sheet discharge tray (41).
Then, a color material sheet (b) having a color material image formed on its surface
Is transferred to the next heat and pressure laminating section (E) by the sheet transfer mechanism.

The heating / pressurizing laminating section (E) is provided with a heating / pressurizing roller (50) and an image receiving sheet feeding mechanism (51) and is transferred from the photosensitive sheet peeling section (D) and has a color material image on its surface. The formed color material sheet (b) and the image receiving sheet (c) fed from the image receiving sheet feeding mechanism (51) are arranged such that the color material image forming surface of the color material sheet (b) and the image receiving sheet (c) overlap each other. Further, it has a function of transferring the color material image to the image receiving sheet (c) by feeding it to the heating pressure roller (50) and applying heat and pressure.

The heating / pressurizing roller (50) is composed of two rollers which are vertically arranged at a predetermined interval and have a heating mechanism therein. The image receiving sheet feeding mechanism (51) includes an image receiving sheet feeding tray (511). ), A feeding roller (512) arranged below the same, and an image receiving sheet supply tray (5
Image receiving sheet feeding roller (51) arranged along the image receiving sheet feeding path from (11) to the pressure roller (50).
3) to (515) and an appropriate guide.

In the heat and pressure laminating section (E), the image receiving sheet (c) of the image receiving sheet supply tray (511) is
The feeding roller (512), the image receiving sheet feeding rollers (513) to (515), and then the heating pressure roller (5
0) and is pressed or heat treated together with the color material sheet (b). The image receiving sheet (c) on which the color material sheets (b) are laminated is transferred to the next color material sheet peeling section (F) by the sheet transfer mechanism.

The color material sheet peeling section (F) is provided with a color material sheet peeling mechanism (60), and is transferred from the heat and pressure laminating section (E) and the color material sheet (b) is laminated on the image receiving sheet (c). ) Is fed to the color material sheet peeling mechanism (60) to peel the color material sheet (b) from the image receiving sheet (c). The color material sheet peeling mechanism (60) is composed of two suction rollers (601) and a pinch roller (602) which are vertically arranged at a predetermined interval. Adsorption roller (60
The adsorption action of 1) can be performed by a vacuum mechanism (not shown) similar to that of the rotating drum (111).

In the coloring material sheet peeling section (F), the coloring material sheet (b) is peeled off by the suction action of the suction roller (601). The peeled color material sheet (b) is pulled up by the pinch roller (602) and fed to the color material sheet discharging section (61). Then, the image receiving sheet (c) to which the color material image is transferred is transferred to the image receiving sheet take-out section (62) by the sheet transfer mechanism.

The function of transferring a multicolor image to the image receiving sheet (c) can be provided by the image receiving sheet circulating mechanism (80). The image receiving sheet circulation mechanism (80) includes a damper (8) provided in the sheet transfer path of the color material sheet peeling section (F).
01), the heating and pressure laminating section (E) from the damper
Circulating rollers (802) to (8) arranged along the circulating image receiving sheet feeding path to the image receiving sheet feeding mechanism (51).
07) and a suitable guide. The circulation rollers (802) to (807) are connected to the image receiving sheet (c).
Are reversed so that the color material image transfer surface of the image receiving sheet (c) and the color material image forming surface of the color material sheet (c) are in contact with each other.

The image receiving sheet circulation mechanism (80) makes the image receiving sheet (c) on which the color material image is transferred stand by and repeats heating and pressing for each color material to transfer the multicolor image to the image receiving sheet (c). Have a function. That is, for example, the image receiving sheet (c) onto which the yellow color material image is transferred is
01) to open the circulation rollers (802) to (8).
07), is reversed in the middle of feeding, is transferred from the photosensitive sheet peeling section (D), and is on the surface of the coloring material image forming surface of the coloring material sheet (b) on which a magenta coloring material image is formed. The magenta color material image is transferred by being fed to the heating and pressing roller (50) so that the color material image transfer surface of the image receiving sheet (c) overlaps. Then, by repeating such an operation, a multicolor image is transferred to the image receiving sheet (c).

The control unit (G) is composed of a computer system, and each of the above functions is controlled by the control unit (G).
Are operated in sequence and sequentially performed. The image receiving sheet circulation mechanism (80) is also operated by the control unit (G),
According to the plate making apparatus of the present invention, both single color image transfer and multicolor image transfer can be performed.

[0084]

According to the present invention described above, an image forming method utilizing a photopolymerizable pressure-sensitive adhesive layer, which does not affect the image by the sensitizing dye contained in the photopolymerizable pressure-sensitive adhesive layer. Provided is a plate making apparatus which employs a novel image forming method and can perform both direct plate making and ordinary contact exposure plate making.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a device of the present invention.

FIG. 2 is a partial explanatory view of the device of the present invention.

FIG. 3 is a partial explanatory view of the device of the present invention.

FIG. 4 is a partial explanatory view of the device of the present invention.

FIG. 5 is an explanatory diagram of an exposure mechanism of the apparatus of the present invention.

FIG. 6 is an explanatory diagram of an image forming method in the apparatus of the present invention.

FIG. 7 is an explanatory diagram of an image forming method in the apparatus of the present invention.

FIG. 8 is an explanatory diagram of an image forming method in the apparatus of the present invention.

FIG. 9 is an explanatory diagram of an image forming method in the apparatus of the present invention.

[Explanation of symbols]

 A: Photosensitive sheet exposure section B: Cover sheet peeling section C: Pressurizing laminating section D: Photosensitive sheet peeling section E: Heat and pressure laminating section F: Color material sheet peeling section G: Control section 10: Photosensitive sheet feeding Feeding mechanism 11: Photosensitive sheet supporting mechanism 12: Exposure mechanism 13: Silver salt film feeding mechanism for image forming plate 20: Cover sheet peeling mechanism 30: Pressure roller 31: Color material sheet feeding mechanism 40: Photosensitive sheet Peeling mechanism 50: Heating / pressurizing roller 51: Image receiving sheet feeding mechanism 60: Color material sheet peeling mechanism 80: Image receiving sheet circulating mechanism

Claims (1)

[Claims] 1. A photosensitive sheet (a) comprising a support (a ₁ ) on which a photosensitive adhesion control layer (a ₂ ) and a cover sheet (a ₃ ) are sequentially laminated, and a support (b). ₁ ) A colorant sheet (b) formed by laminating a colorant layer (b ₂ ) on top of this, and an image receiving sheet (c). By changing the adhesiveness between the exposed portion and the unexposed portion of (a ₂ ), the photosensitive adhesive control layer (a ₂ ) of the photosensitive sheet (a) and the color material layer (b) of the color material sheet (b) are changed.
₂ ) and are superposed and subjected to pressure or pressure heat treatment,
A color material image is formed on the color material layer (b ₂ ) side of the color material sheet (b) by peeling off the photosensitive sheet (a), and then the color material image is formed on the image receiving sheet (c) by pressure heat treatment. A plate making apparatus for transferring, I: a housing (1), a photosensitive sheet exposing section (A) provided inside the housing (1), a cover sheet peeling section (B), a pressure laminating section (C), a photosensitive sheet Sheet peeling section (D), heating and pressure laminating section (E), and color material sheet peeling section (F)
And (A) to (F), a sheet transport mechanism that sequentially transports sheets, and a control unit (G) that operates them. IIA: Photosensitive sheet exposure unit (A) Sheet feeding mechanism (10), silver salt film feeding mechanism for image-making plate making (13), photosensitive sheet supporting mechanism (11), laser controlled by light of constant intensity or color-separated digital image signal Is provided with an exposure mechanism (12) and an exposure mechanism switching device (129), and from the photosensitive sheet feeding mechanism (10) and the silver salt film feeding mechanism (13) for image forming plate making to the photosensitive sheet supporting mechanism ( A first exposure function of performing exposure by irradiating the silver salt film (e) for image formation which has been fed to 11) and is laminated and fixed on the photosensitive sheet (a) with light of a constant intensity. , And the photosensitive sheet feeding mechanism (10 Has a second exposure function of irradiating the photosensitive sheet (a), which is fed to the photosensitive sheet supporting mechanism (11) and is fixed, with a laser, and these two exposure functions are , The exposure mechanism switching device (129), and IIB: the cover sheet peeling section (B) is the peeling mechanism (20).
A photosensitive sheet (a), which is provided with an image forming silver salt film (e) and which has been transferred from the photosensitive sheet exposure section (A) and is laminated to the image forming plate, is fed to a peeling mechanism (20). First peeling function for peeling off the silver salt film (e) for use from the cover sheet (a ₃ ) of the photosensitive sheet (a), and
Photosensitive sheet The photosensitive sheet (a) transferred from the exposure section (A) is fed to the peeling mechanism (20) to cover the cover sheet (a).
₃ ) has a second peeling function of peeling, and these two peeling functions are switched according to the above-mentioned two exposure functions, and IIC: pressure laminating section (C) is a pressure roller (3).
0) and a color material sheet feeding mechanism (31), the sheet is transferred from the cover sheet peeling section (B) and the cover sheet (a ₃ ).
The photosensitive sheet (a) and the color material sheet (b) fed from the color material sheet feeding mechanism (31) are peeled off to form a photosensitive adhesive control layer (a ₂ ) and a color material layer (b ₂ ). Has a function of feeding to a pressure roller (30) so as to overlap with and performing pressure or pressure heat treatment, and IID: the photosensitive sheet peeling section (D) includes a photosensitive sheet peeling mechanism (40). , Having a function of peeling the photosensitive sheet (a) from the laminate of the photosensitive sheet (a) and the color material sheet (b) transferred from the pressure laminating unit (C), IIE: heat and pressure laminating The section (E) includes a heating / pressurizing roller (50) and an image receiving sheet feeding mechanism (51), and is transferred from the photosensitive sheet peeling section (D) and has a color material sheet (b) on which a color material image is formed. ) And the image receiving sheet feeding mechanism (5
1) The image receiving sheet (c) fed from 1) is fed to the heating and pressing roller (50) so that the image forming surface of the color material image forming surface of the color material sheet (b) and the image receiving sheet (c) are overlapped and heated. It has a function of transferring a color material image to the image receiving sheet (c) by pressing, and IIF: the color material sheet peeling section (F) includes a color material sheet peeling mechanism (60), and a heating and pressurizing laminating section (E). ), And feeds the image receiving sheet (c) on which the color material sheet (b) is laminated to the color material sheet peeling mechanism (60) to peel the color material sheet (b) from the image receiving sheet (c). IIG: A plate making apparatus characterized in that the control section (G) is operated so that the above-mentioned respective functions are sequentially performed.