JPH06332158A - Direct plate making device - Google Patents

Abstract

PURPOSE:To provide a direct plate making device which adopts a new image forming method and whose constitution is compact. CONSTITUTION:This device is mainly constituted of a photosensitive sheet feeding mechanism 10, a cover sheet peeling mechanism 20, a color-material sheet feeding mechanism 30, a photosensitive sheet peeling mechanism 40, an image receiving sheet feeding mechanism, a color-material sheet peeling mechanism, an image receiving sheet peeling mechanism, a laser exposure mechanism 12 by a digital image signal, a rotary drum A, a roller for carrying B and a heating and pressure roller. 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 and transferred on an image receiving sheet 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 direct plate-making apparatus, and more specifically, it relates to an image forming method utilizing a photopolymerizable pressure-sensitive adhesive layer, which comprises a sensitizing dye contained in the photopolymerizable pressure-sensitive adhesive layer. The present invention relates to a direct plate-making apparatus which adopts a novel image forming method in which an image is not affected and has a compact structure.

[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. An object of the present invention is to provide a direct plate making apparatus having a compact structure 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: the photosensitive sheet feeding mechanism (10), the cover sheet peeling mechanism (20), colorant sheet feeding mechanism (30), the photosensitive sheet peeling mechanism (40), the image-receiving sheet feeding mechanism (50),
Color material sheet peeling mechanism (60), image receiving sheet peeling mechanism (7
0), an exposure mechanism (12) using a laser controlled by a color-separated digital image signal, a rotating drum (A),
The transport roller (B), the heating / pressurizing roller (C), and a control unit for operating these are mainly configured, and the rotating drum (A) and the transport roller (B) are arranged such that their circumferential surfaces are close to each other and can be separated from each other. The transfer roller (B) and the heating / pressurizing roller (C) are arranged so that their peripheral surfaces can move toward and away from each other. IIA: a photosensitive sheet feeding mechanism (10) and an exposure mechanism (1)
2) and the cover sheet peeling mechanism (20), when the rotating drum (A) and the transport roller (B) are separated from each other,
According to the rotation of the rotary drum (A), the photosensitive sheet (a) is fed and fixed to the peripheral surface of the rotary drum (A) with the cover sheet (a ₃ ) as the surface. ) Is exposed to a laser to expose the photosensitive sheet (a).
IIB: the color material sheet feeding mechanism (30) has a function of peeling off the cover sheet (a ₃ ) from the rotary drum (A) and the transport roller (B).
According to the rotation of the rotary drum (A), the photosensitive material (a) wound around the rotary drum (A) is colored on the surface of the photosensitive adhesive control layer (a ₂ ) with the color material layer (b ₂ ) as the lower surface. It has a function of feeding the material sheet (b) and superimposing the photosensitive sheet (a) and the color material sheet (b), and IIC: the rotating drum (A), the transport roller (B) and the photosensitive sheet. The peeling mechanism (40) includes a photosensitive sheet (a) wound around the rotating drum (A) according to the rotation of the rotating drum (A) and the transporting roller (B) in the proximity of each other.
And pressurizing or pressure heat treating the color material sheet (b),
A coloring material sheet (b) having a coloring material image formed on its surface is wound around the peripheral surface of the transport roller (B), and has a function of peeling off the photosensitive sheet (a) remaining on the rotary drum (A). IID: The heating and pressing roller (C) and the image receiving sheet feeding mechanism (50) feed the image receiving sheet (c) onto the peripheral surface of the heating and pressing roller (C) according to the rotation of the heating and pressing roller (C). Feed and fix the roll, and heat and pressure roller (C)
And the transport roller (B) are close to each other, the image receiving sheet (c) wound around the heating and pressing roller (C) and the color material sheet wound around the transport roller (B) according to the rotation of the both. The first function of transferring the color material image to the image receiving sheet (c) by bringing it into contact with the color material image forming surface of (b) and the image receiving sheet (c) to which the color material image is transferred.
Is held on the heating / pressurizing roller (C) to stand by, and the second function of repeating the above heating and pressing for each color material to transfer a multicolor image to the image receiving sheet (c), and , These two functions are selectively performed by a command from the control unit described later, and IIE: the color material sheet peeling mechanism (60) follows the rotation of the transportation roller (B) and the transportation roller (B). IIF: the image receiving sheet peeling mechanism (70) has a function of peeling off the coloring material sheet (b) remaining in the image receiving sheet (c) onto which the coloring material image is transferred according to the rotation of the heating and pressing roller (C). ) Is peeled off from the heating / pressurizing roller (C), and the IIG: control unit performs each of the above-mentioned functions in sequence, and further, the heating / pressing laminating unit (E) applies the image receiving sheet (c) to the image receiving sheet (c). When transferring a multicolor image, the above functions are repeated for each color material. Manipulating As performed returned lies in direct plate-making apparatus according to claim.

[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. 4 to 7 are explanatory views of the image forming method in the plate making apparatus of the present invention, FIGS. 4 and 5 show a negative type aspect, and FIGS. 6 and 7 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. 4 and 5,
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 portion of the photosensitive tackiness control layer (a ₂ ) (photopolymerizable tackiness layer (a ₂₁ )) of the photosensitive sheet (a) is reduced (FIG. 4).
(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. 4 (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. 4C).

(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. 5 (4)). (5) The color material sheet (b) is peeled off from the image receiving sheet (c) ((FIG. 5 (5)).

In the positive mode shown in FIGS. 6 and 7,
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 tackiness of the exposed part of the is reduced (FIG. 6 (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. 6 (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. 6C). 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. 7).
(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. 7 (5)). (6) The color material sheet (b) is peeled from the image receiving sheet (c) ((FIG. 7 (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,
Trimethylolpropane triacrylate,
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 prepared by performing a pressure roller treatment 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, and the same pressure roller 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. 1 and 2 are partial explanatory views of the device of the present invention, in which only main components are displayed. FIG. 3 is an explanatory diagram of the exposure mechanism of the device of the present invention.

The plate making apparatus of the present invention comprises a photosensitive sheet feeding mechanism (10), a cover sheet peeling mechanism (20), a coloring material sheet feeding mechanism (30), a photosensitive sheet peeling mechanism (40),
Image receiving sheet feeding mechanism (50), color material sheet peeling mechanism (6
0), an image receiving sheet peeling mechanism (70), an exposure mechanism (12) using a laser controlled by color-separated digital image signals, a rotating drum (A), a transport roller (B),
The heating / pressurizing roller (C) is mainly composed of a control unit for operating these, and the rotating drum (A) and the transporting roller (B) are arranged such that their circumferential surfaces are close to and away from each other, and the transporting roller (B). The heating pressure roller (C) and the heating and pressing roller (C) are arranged so that their peripheral surfaces can approach and separate from each other.

The rotary drum (A), the conveying roller (B), and the heating / pressurizing roller (C) all apply a vacuum action to the surface of the drum through a large number of minute holes provided on the peripheral surface to load the sheet. Vacuum mechanism for tightly fixing (not shown)
Is equipped with. As the heating / pressurizing roller (C), a pressing roller having a heating mechanism inside is used. Further, in the illustrated example, the horizontal movement mechanism is provided in the transport roller (B) located between the rotary drum (A) and the heating and pressing roller (C), so that the rotary drum (A) and the transport roller can be transported. The peripheral surface of the roller (B) and the peripheral surface of the transport roller (B) and the heating / pressurizing roller (C) can freely approach and separate from each other. The horizontal movement mechanism
In the illustrated example, a screw mechanism composed of a rotating screw portion (1) and a moving screw portion (2) is used, but in addition to a rack mechanism, a cam mechanism, etc., horizontal movement using a servo motor, a stepping motor, etc. A mechanism or the like can also be adopted.

The photosensitive sheet feeding mechanism (10) includes a photosensitive sheet feeding tray (101), a feeding roller (102) arranged below the photosensitive sheet feeding tray (101), and a photosensitive drum feeding tray (101) to a rotary drum (A). Feeding rollers (103) arranged along the feeding path of the photosensitive sheet
(106) and a suitable guide (107).

The exposure mechanism (12) includes a laser oscillator (121) and a beam compressor (12) as shown in FIG.
2), an ultrasonic light modulator (123), a beam expander (124), a cylinder lens (125), a polygon mirror (126), a toroidal lens (127), and an f-θ lens (128). 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 a He—Cd laser. In particular, the argon ion laser and the semiconductor laser are excellent in terms of stability, life, and price.

The cover sheet peeling mechanism (20) includes a suction roller (201) disposed in the vicinity of the rotating drum (A),
Pinch roller (202), guide roller (203),
Consists of a suitable guide (204). The suction action of the suction roller (201) can be performed by a vacuum mechanism (not shown) similar to that of the rotary drum (A).

The photosensitive sheet feeding mechanism (10), the exposure mechanism (12), and the cover sheet peeling mechanism (20) described above have the rotating drum (A) and the transport roller (B) separated from each other. In accordance with the rotation of (A), the photosensitive sheet (a) is fed on the peripheral surface of the rotating drum (A) with the cover sheet (a ₃ ) as the surface, and is fixed by winding. It has a function of peeling the cover sheet (a ₃ ) from the photosensitive sheet (a) by irradiating it with a laser for exposure.

That is, the photosensitive sheet (a) pulled out from the photosensitive sheet supply tray (101) by the feeding roller (102) is fed to the feeding rollers (103) to (103).
Through (106), it is fed to the rotary drum (A) and fixed in close contact. As the rotating drum (A) rotates, the photosensitive sheet (a) wound and fixed on the surface of the rotating drum (A) has a laser oscillator (12) controlled by color-separated digital image signals.
Scanning image exposure is performed with the laser from 1). And
The cover sheet (a ₃ ) is peeled off by the suction action of the suction roller (201), pulled up by the pinch roller (202), and fed to the sheet discharge tray (205) through the guide roller (203) and the like.

As the above-mentioned exposure conditions, for example, the condition that the rotation speed of the rotary drum (121) is 765 rpm, the laser beam diameter is 7 μm, and the scanning pitch is 5 μm can be adopted. The photosensitive sheet (a) from which the cover sheet (a ₃ ) has been peeled off is held while being fixed in close contact with the rotary drum (A).

The color material sheet feeding mechanism (30) includes a color material sheet supply tray (301), a feeding roller (302) arranged below the color material sheet supply tray (301), and a color material sheet supply tray (30).
Feed rollers (303) to (306) arranged along the feeding path of the color material sheet from 1) to the rotating drum (A).
And a suitable guide (307). And
The feeding rollers (303) to (306) are in a positional relationship in which the color material layer (b ₂ ) of the color material sheet (c) is in contact with the photosensitive adhesion control layer (a ₂ ) of the photosensitive sheet (a). It is located in.

The illustrated color material sheet supply tray (301)
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 of the exposure mechanism (12), the color material sheet (c) corresponding to the color is used each time.

The color material sheet feeding mechanism (30) is wound around the rotary drum (A) in accordance with the rotation of the rotary drum (A) in a state where the rotary drum (A) and the transport roller (B) are separated from each other. The coloring material sheet (b) is fed to the surface of the photosensitive adhesive control layer (a ₂ ) of the rotated photosensitive sheet (a) with the coloring material layer (b ₂ ) being the lower surface to feed the photosensitive material (a). And the color material sheet (b) are superposed.

That is, the color material sheet (b) pulled out from the color material sheet supply tray (301) by the feeding roller (302) is fed by the feed rollers (303) to (3).
06) through feeding rollers (105) and (106)
And the coloring material layer (b ₂ ) is superposed on the surface of the photosensitive adhesive control layer (a ₂ ) of the photosensitive sheet (a) according to the rotation of the rotating drum (A).

The photosensitive sheet peeling mechanism (40) is also used as the cover sheet peeling mechanism (20) in the illustrated example. Then, the rotary drum (A), the transport roller (B), and the photosensitive sheet peeling mechanism (40) described above.
Is pressed against the photosensitive sheet (a) and the color material sheet (b) wound around the rotating drum (A) in accordance with the rotation of the rotating drum (A) and the transporting roller (B) in the proximity state. Alternatively, pressure heat treatment is performed to wind the color material sheet (b) on the surface of which the color material image is formed around the transport roller (B), and the photosensitive sheet (a) remaining on the rotary drum (A) is peeled off. Have the function to

That is, the transfer roller (B) has a horizontal moving mechanism (a rotating screw portion (1) and a moving screw portion (2)).
Of the photosensitive drum (a) and the coloring material sheet (b) according to the rotation of the rotating drum (A) and the conveying roller (B). Moreover, only the color material sheet (b) on the surface of which the color material image is formed is wound around the peripheral surface of the transport roller (B). An auxiliary roller (3) arranged so as to be able to approach and separate from the rotating drum (A) is provided as necessary,
It has a function of supplementing pressure or pressure heat treatment.

The photosensitive sheet (a) remaining on the rotary drum (A) is peeled off by the suction action of the suction roller (201), pulled up by the pinch roller (202), and passed through the guide roller (203) and the like. It is delivered to the discharge tray (205). Since only the color material sheet (b) on the rotary drum (A) is reliably wound around the transport roller (B), the degree of the suction action of the rotary drum (A) and the transport roller (B) is as necessary. Can also be controlled. The pressure bonding rollers (5a), (5
b) is provided as needed to assist crimping.

The image receiving sheet feeding mechanism (50) includes an image receiving sheet supply tray (501), a feeding roller (502) arranged below the image receiving sheet supply tray (501), and an image receiving sheet supply tray (50).
Feeding rollers (503), (5) arranged along the feeding path of the image receiving sheet from (1) to the heating and pressing roller (C).
04) and a suitable guide (505).

The heating / pressurizing roller (C) and the image-receiving sheet feeding mechanism (50) are arranged on the peripheral surface of the heating / pressurizing roller (C) according to the rotation of the heating / pressurizing roller (C). ) Is fed and fixed by winding, and in a state where the heating / pressurizing roller (C) and the transporting roller (B) are close to each other, they are wound around the heating / pressurizing roller (C) in accordance with their rotation. The color material image is transferred to the image receiving sheet (c) by bringing the image receiving sheet (c) and the color material image forming surface of the color material sheet (b) wound around the transport roller (B) into contact with each other and applying heat and pressure. And the image receiving sheet (c) on which the color material image is transferred is held on the heating / pressurizing roller (C) and made to stand by, and the above heat and pressure is repeated for each color material to obtain the image receiving sheet ( It has a second function of transferring a multicolor image to c).
These two functions are selectively performed by a command from the control unit described later.

That is, the image receiving sheet (c) pulled out from the image receiving sheet supply tray (501) by the feeding roller (502) is fed by the feeding rollers (503), (5).
04), and according to the rotation of the heating and pressure roller (C),
The image receiving sheet (c) is fed onto the peripheral surface of the heating / pressurizing roller (C) and is fixed by winding.

On the other hand, the transporting roller (B) is brought close to the heating and pressing roller (C) by driving the horizontal moving mechanism (rotating screw portion (1) and moving screw portion (2)),
The color material image is transferred to the image receiving sheet (c) by bringing the image receiving sheet (c) and the color material sheet (b) into contact with each other in accordance with the rotation of the heating / pressurizing roller (C) and the transport roller (B) to apply heat and pressure. Yes (first function). The auxiliary roller (4), which is arranged so as to be able to approach and separate from the heating and pressing roller (C), is provided as necessary and has a function of supplementing the pressure heat treatment. Further, the pressure bonding rollers (6b) and (6c) are
It is provided as necessary to assist crimping. Then, the image receiving sheet (c) on which the color material image is transferred is heated and pressed by the image receiving sheet peeling mechanism (70) described below (C).
Stripped from.

Further, the image receiving sheet (c) on which the color material image is transferred is held on the heating and pressing roller (C) and is made to stand by, and the multicolor image is repeated by repeating the heating and pressing for each color material. Is transcribed (second function). For example, the image receiving sheet (c) on which the yellow color material image is transferred is
Hold it on the heating / pressurizing roller (C) and let it stand by.
The magenta color material image is transferred by being brought into contact with the color material image forming surface of the color material sheet (b) which is transported by the transport roller (B) and has a magenta color material image formed on the surface thereof. Then, by repeating such an operation, a multicolor image is transferred to the image receiving sheet (c).

The color material sheet peeling mechanism (60) includes a suction roller (60) arranged in proximity to the transport roller (B).
1), pinch roller (602), guide roller (60
3), consisting of a suitable guide (604). The suction action of the suction roller (601) can be performed by a vacuum mechanism (not shown) similar to that of the rotary drum (A). The color material sheet peeling mechanism (60) has a function of peeling the color material sheet (b) remaining on the transport roller (B) according to the rotation of the transport roller (B). The peeled color material sheet (b) is fed to the color material sheet discharge tray (605).

The image receiving sheet peeling mechanism (70) includes a suction roller (70) arranged in the vicinity of the heating / pressurizing roller (C).
1), pinch roller (702), guide roller (70
3), consisting of a suitable guide (704). The suction action of the suction roller (701) can be performed by a vacuum mechanism (not shown) similar to that of the rotary drum (A). Then, it has a function of peeling the image receiving sheet (c) on which the color material image is transferred from the heating and pressing roller (C) in accordance with the rotation of the heating and pressing roller (C). The peeled image receiving sheet (c) is fed to the image receiving sheet discharge tray (705).

In the plate making apparatus of the present invention, the exposed photosensitive sheet feeding mechanism (80) may be provided to feed the exposed photosensitive sheet to the rotary drum (A). The exposed photosensitive sheet feeding mechanism (80) includes a roller (801),
The exposed photosensitive sheet feeding path formed by these (802) and a suitable guide reaches the feeding roller (306) of the coloring material sheet feeding mechanism (30).
By providing the exposed photosensitive sheet feeding mechanism (80), transfer can be performed even from a separately exposed photosensitive sheet, and the function of the plate making apparatus of the present invention is further enhanced.

The control unit (not shown) is composed of a computer system, and the above-mentioned functions are operated by the control unit and performed sequentially. Further, the peeling of the image receiving sheet (c) from the heating / pressurizing roller (C) is also operated by the control unit, and according to the plate making apparatus of the present invention, both single color image transfer and multicolor image transfer can be performed. . Each of the above-mentioned mechanisms and the like is usually housed in one housing, but various trays may be housed separately.

[0078]

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 direct plate-making apparatus which adopts a novel image forming method and has a compact structure.

[Brief description of drawings]

FIG. 1 is a partial explanatory view of a device of the present invention.

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

FIG. 3 is an explanatory diagram of an exposure mechanism of the apparatus of the present invention.

FIG. 4 is an explanatory diagram of an image forming method in the apparatus of the present invention.

FIG. 5 is an explanatory diagram of an image forming method in 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.

[Explanation of symbols]

 10: Photosensitive sheet feeding mechanism 20: Cover sheet peeling mechanism 30: Color material sheet feeding mechanism 40: Photosensitive sheet peeling mechanism 50: Image receiving sheet feeding mechanism 60: Coloring material sheet peeling mechanism 70: Image receiving sheet peeling mechanism 12 : Exposure mechanism A: Rotating drum B: Transport roller C: Heating / pressurizing roller

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. Which is a direct plate making apparatus for transferring: I: photosensitive sheet feeding mechanism (10), cover sheet peeling mechanism (20), color material sheet feeding mechanism (30), photosensitive sheet peeling mechanism (40), image receiving Sheet feeding mechanism (50),
Color material sheet peeling mechanism (60), image receiving sheet peeling mechanism (7
0), an exposure mechanism (12) using a laser controlled by a color-separated digital image signal, a rotating drum (A),
The transport roller (B), the heating / pressurizing roller (C), and a control unit for operating these are mainly configured, and the rotating drum (A) and the transport roller (B) are arranged such that their circumferential surfaces are close to each other and can be separated from each other. The transfer roller (B) and the heating / pressurizing roller (C) are arranged so that their peripheral surfaces can move toward and away from each other. IIA: a photosensitive sheet feeding mechanism (10) and an exposure mechanism (1)
2) and the cover sheet peeling mechanism (20), when the rotating drum (A) and the transport roller (B) are separated from each other,
According to the rotation of the rotary drum (A), the photosensitive sheet (a) is fed and fixed to the peripheral surface of the rotary drum (A) with the cover sheet (a ₃ ) as the surface. ) Is exposed to a laser to expose the photosensitive sheet (a).
IIB: the color material sheet feeding mechanism (30) has a function of peeling off the cover sheet (a ₃ ) from the rotary drum (A) and the transport roller (B).
According to the rotation of the rotary drum (A), the photosensitive material (a) wound around the rotary drum (A) is colored on the surface of the photosensitive adhesive control layer (a ₂ ) with the color material layer (b ₂ ) as the lower surface. It has a function of feeding the material sheet (b) and superimposing the photosensitive sheet (a) and the color material sheet (b), and IIC: the rotating drum (A), the transport roller (B) and the photosensitive sheet. The peeling mechanism (40) includes a photosensitive sheet (a) wound around the rotating drum (A) according to the rotation of the rotating drum (A) and the transporting roller (B) in the proximity of each other.
And pressurizing or pressure heat treating the color material sheet (b),
A coloring material sheet (b) having a coloring material image formed on its surface is wound around the peripheral surface of the transport roller (B), and has a function of peeling off the photosensitive sheet (a) remaining on the rotary drum (A). IID: The heating and pressing roller (C) and the image receiving sheet feeding mechanism (50) feed the image receiving sheet (c) onto the peripheral surface of the heating and pressing roller (C) according to the rotation of the heating and pressing roller (C). Feed and fix the roll, and heat and pressure roller (C)
And the transport roller (B) are close to each other, the image receiving sheet (c) wound around the heating and pressing roller (C) and the color material sheet wound around the transport roller (B) according to the rotation of the both. The first function of transferring the color material image to the image receiving sheet (c) by bringing it into contact with the color material image forming surface of (b) and the image receiving sheet (c) to which the color material image is transferred.
Is held on the heating / pressurizing roller (C) to stand by, and the second function of repeating the above heating and pressing for each color material to transfer a multicolor image to the image receiving sheet (c), and , These two functions are selectively performed by a command from the control unit described later, and IIE: the color material sheet peeling mechanism (60) follows the rotation of the transportation roller (B) and the transportation roller (B). IIF: the image receiving sheet peeling mechanism (70) has a function of peeling off the coloring material sheet (b) remaining in the image receiving sheet (c) onto which the coloring material image is transferred according to the rotation of the heating and pressing roller (C). ) Is peeled off from the heating / pressurizing roller (C), and the IIG: control unit performs each of the above-mentioned functions in sequence, and the image receiving sheet (c) on the heating / pressurizing roller (C) is When transferring a multicolor image, the above functions are repeated for each color material. Direct plate making apparatus, characterized in that the operation as crack.