JPH08216496A - Printing method and printer using the method - Google Patents

Abstract

PURPOSE: To reduce the number of components and the cost by forming a perforated part with a protrusion, providing an image-forming unit made of an inverted state on one mask surface, and supplying inks of different colors to the parts. CONSTITUTION: A protrusion forming step is executed in the state that a protrusion is exposed on the outer surface when a stencil master 11 is wound on a plate cylinder 2. The perforated master 22 is opposed to an ink-supplying mechanism 110 for the protrusion upon rotation of the cylinder 2, an ink roller is approached to the cylinder 2, and ink is supplied to the surface of the protrusion placed on the surface. Thereafter, the master 11 receives ink from an ink supply mechanism 3 placed in the cylinder. The first ink is stuck to the protrusion, and second ink is passed through the hole to be printed on a print sheet S. With this structure, the number of the components and the cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-making printing method,
More specifically, it relates to a plate-making printing method capable of performing multi-color printing according to a multi-color original and a plate-making printing apparatus using the same.

[0002]

2. Description of the Related Art One of printing apparatuses is a stencil printing apparatus. This printing device winds a stencil master, which has holes corresponding to the original image by a punching process corresponding to the plate making process, around a plate cylinder having an ink permeation structure, and supplies ink to the plate cylinder. The image is printed by leaching the ink from the mechanism and transferring the ink to the printing paper pressed against the plate cylinder.

By the way, one of the printing methods is multicolor printing using a full-color original such as a color photograph or a poster. In the case of performing this printing, a technique of hardness such as fine adjustment such as color matching is required, so that it is almost impossible with the above-mentioned stencil printing apparatus.

In recent years, by replacing the drum, a stencil printing apparatus capable of overprinting in multiple colors but not in full color has been proposed, and multicolor printing in 2 to 5 colors is performed. Is becoming possible.

Particularly, among the multicolor printing, the two-color printing is convenient, so that it is frequently used.

As an example of performing the above-mentioned two-color printing, there is a method in which a drum is replaced and a print image of each color is printed. This case will be described below. A color CCD or a monochrome CCD is arranged in the document reading unit, and a color filter is arranged in front of the document reading unit to perform color separation of each color when reading the document, and the image information is stored in the control unit. The first of the color image information stored in the control unit
A plate making process for producing a master for using that color is executed based on the image information of that color. After the plate making, the stencil master punched according to the image information by the plate making is wound around the plate cylinder, and the ink of the color corresponding to the first color is supplied to the stencil master for printing. Done. Next, after waiting for the image of the first color to dry, the image information of the second color of the colors separated by color separation is stored in the control unit. According to the image information of the second color stored in the control unit, the plate making process of the image master is executed in the same manner as when printing the color, and the stencil master that has made the plate winds the stencil master of the first color. The printing drum is wound on a printing drum different from the printing drum and the ink is supplied so that the printing of the color different from the first color is performed on the same printing paper (for example, Japanese Patent Laid-Open No. Sho 64). -18682). As a method of forming the master of different colors,
For example, as described in JP-A-48-46410, a copy is formed using an electrophotographic process,
A method of forming this copy as a printing master by a fixing device and an etching device.

[0007]

However, the above multicolor printing method has the following problems.

First, since it is necessary to prepare a plate cylinder for each color to be printed, the number of parts and the management and maintenance become large. The reason for using such a plurality of plate cylinders is that the use of inks of different colors in the same plate cylinder eliminates the need for operations such as color mixing and removal of inks of the used colors. Secondly, if printing is performed for each color, the printing time required for multicolor printing may be lengthened.
The lengthening of the printing time is also increased by the need to dry the printed image after the first printing is completed. It requires replacement work of the plate cylinder, resulting in poor printing work. Since it is necessary to replace the plate cylinder according to the number of colors to be printed, the replacement work becomes more troublesome as the number of colors increases, and the working time also increases. At the time of printing the next color, which is executed after the plate cylinder is exchanged, the consistency of the printing position with the previously printed image is likely to be poor, and alignment as a process for this is required. The more the number of colors to be printed, the more the alignment is performed by the work of trial printing, and therefore the workability of the printing work will be deteriorated even from now on.

In view of the above-mentioned problems in the conventional multicolor printing method, an object of the present invention is to reduce the number of parts and costs in managing the parts, and to improve the working life. To provide the printing device that was used.

[0010]

In order to achieve this object, the invention according to claim 1 is a plate making process for making a plate according to image information on a master, and winding the master on the surface of a plate cylinder. A printing method for printing on a printing paper by transferring ink from the master by supplying ink, the plate making step is performed by the first image information of the image information. According to the step of forming a hole that penetrates the master in the thickness direction, and a step of forming a convex portion on the master according to second image information of the image information. In the printing step, a first ink supplying step of supplying ink to the surface of the convex portion formed in the convex forming step and a second ink supplying step of supplying ink to the perforated portion formed by the perforation forming step. Ink supply process , A sheet feeding step for feeding the print sheet toward the second ink supply step executing unit, the first was supplied by the first and second ink supply step, a second
And an image transfer step of transferring a visible image according to the image information to the printing paper.

According to a second aspect of the present invention, in the printing method according to the first aspect, the convex portion forming step forms the convex portion by adhering a thermosetting resin to the master surface.

According to a third aspect of the present invention, in the printing method according to the first or second aspect, the convex portion formed in the convex portion forming step is the ink supplied in the second ink supplying step in the transferring step. It is characterized in that it is formed at a height such that the same result as when it comes in contact with the printing paper to be transferred is obtained.

According to a fourth aspect of the present invention, in the printing method according to one of the first to third aspects, the second ink supply step uses an ink supply mechanism located inside the plate cylinder. It is characterized in that the first ink supply process is executed by using an ink supply mechanism located near the outer surface of the master wound on the plate cylinder.

According to a fifth aspect of the present invention, in the printing method according to one of the first to third aspects, the master in which the perforations and the convex portions are formed by the perforation forming step and the convex hole forming step, It is characterized by being wound around a single plate cylinder.

According to a sixth aspect of the present invention, in the printing method according to the first aspect, the first and second image information used in the perforation forming step and the convex portion forming step are color-separated from a multicolor original. It is characterized in that color image information is used.

The invention according to claim 7 is a printing apparatus using the plate-making printing method according to any one of claims 1 to 5, which is rotatable and has a large number of perforations formed on its surface. A single plate cylinder and means for supplying the thermosetting resin to the master surface, which is provided to carry out the convex forming step, and cures the thermosetting resin supplied to the master surface. A heating unit for performing the perforation forming step, a thermal head provided for performing the perforation forming step, capable of contacting the same surface of the master and changing the heating state, and the first ink supplying step. An ink supply mechanism arranged in the vicinity of the outer surface of the plate cylinder for executing the above, and an ink supply mechanism arranged in the plate cylinder for executing the second ink supply step; Convex surface and perforation on plate cylinder A sheet feeding device for feeding ink in a state in which the printing sheet is in contact with the plate cylinder after the ink is fed by the first and second ink feeding steps, and the thermosetting resin feeding means. The thermal head is connected to the output side, and the image information is input, so that a supply command is issued to the thermosetting resin supply means and the thermal head according to the first and second image information. And a control unit.

[0017]

According to the invention described in claims 1 to 4 and 6, when the perforated portion is a concave portion, an image forming portion having a contradictory form is provided on one master surface, and ink of different colors is supplied to each portion. You can

In the invention of claim 5, the same master is wound around a single plate cylinder.

According to the invention described in claim 7, a convex portion and a perforated portion are formed for one master, and the master is placed in a single plate cylinder, and one master of each color is formed during one rotation of the plate cylinder. Ink is supplied, and after the supply, the work of transferring the ink to the printing paper is performed.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the embodiments shown in the drawings.

FIG. 1 is a schematic diagram for explaining the overall structure of a printing apparatus used in an embodiment of the present invention. In addition,
In the present embodiment, a stencil master that has been subjected to perforation forming processing is used as the master, so a stencil printing apparatus will be described. The schematic configuration and operation of the stencil printing machine will be described below with reference to FIGS. 1 and 2.

In FIG. 1, the stencil printing machine 1 is equipped with a plate cylinder 2 which can rotate in the forward and reverse directions about a rotary shaft 2A.
A large number of perforations are formed on the peripheral surface of the plate cylinder 2 except for a part thereof, and a thin mesh screen (not shown) made of, for example, synthetic fiber is attached to the surface thereof. It is also possible to use a metal as the material of this mesh screen. Although not shown, a stage made of a magnetic material having a mounting surface along one generatrix of the plate cylinder 2 is swingably supported at a position where no perforation is formed on the peripheral surface of the plate cylinder 2. A clamper including a holding member that can be brought into and out of contact with the stage is provided. The tip of the master 11 can be placed on the stage, and the master 11 whose tip is placed on the stage is sandwiched and fixed by a gripping member. The area other than the leading end of the master 11 is from the ink supply mechanism 3 to the plate cylinder 2 described later.
The ink supplied to the surface of the plate adheres to the surface of the plate cylinder.

An ink supply mechanism 3 is provided inside the plate cylinder 2. The ink supply mechanism 3 is arranged directly below the rotary shaft 2A, and includes an ink roller 3A and a doctor roller 3B as main parts. Ink roller 3A
Is a metal roller disposed below the rotary shaft 2A of the plate cylinder 2 and facing the press roller 4 described later, and is rotatable in the direction of the arrow shown in the drawing. The ink that rotates at a speed that is synchronized with the peripheral speed of the plate cylinder 2 and whose amount is carried by the doctor roller 3B is regulated.
And can be fed into the perforations of the mesh screen. The ink, the amount of which is carried by the doctor roller 2B, is dropped from the ejection port 2A1 formed on the rotary shaft 2A into the ink reservoir 3C. The ink applied to the ink supply mechanism 3 is a color ink for monochrome printing. The ink roller 3A is arranged at a position facing a press roller 4 described later, so that the press roller 4 is attached to the plate cylinder 2.
It also functions as a backup roller that prevents the plate cylinder 2 from being deformed when it comes into contact with.

The press roller 4 arranged at a position facing the ink roller 3A is a rotating member provided so as to be able to come into contact with and separate from the plate cylinder 2, and a printing paper S is fed from a paper feeding device 5 described later. When being sent, the printing paper S can be pressed toward the surface of the plate cylinder 2.

A paper feeding device 5 is provided near the press roller 4. The sheet feeding device 5 is provided so as to be capable of coming into contact with and separating from the uppermost one of the printing sheets S placed in the sheet feeding cassette 5A, and feeds out the printing sheet S in a feeding direction corresponding to the arrow direction in the drawing. The feeding roller 6 and the feeding path of the printing paper S (indicated by an extension line along the moving direction of the printing paper S in the figure) are arranged to face each other, and the feeding of the printing paper S fed out is performed in a double feed manner. Separation rollers 7 and 8 rotatable in a direction capable of blocking, plate cylinder 2 and press roller 4
Registration roller 9 for feeding the print sheet S by setting the feeding timing of the print sheet S toward the position where and are in contact with each other.
It consists of and. In the paper feeding device 5, the feeding roller 6 is brought into contact with the uppermost one of the printing papers S stored in the paper feeding cassette 5A to rotate, thereby rotating the printing paper S.
And the separating rollers 7 and 8 feed only the uppermost printing paper S toward the registration rollers 9. The printing paper S is nipped by the registration rollers 9, and the timing when the press roller 4 contacts the plate cylinder 2 is used as a reference.
The sheet is fed toward the contact position between the plate cylinder 2 and the press roller 4 at the timing of aligning the image position of the stencil master with the image transfer start position on the printing paper S.

A plate-making section 10 is arranged above one side of the plate cylinder 2 with the center line in the vertical direction interposed therebetween. The plate making unit 10 is
As shown in FIG. 3, the master 11 has a thin thermoplastic resin film 11B having a thickness of about 1 to 2 μm.
On the other hand, a Japanese paper or synthetic fiber to be the porous support 11C, or a mixture of these materials is pasted to form a laminated structure.

The master 11 as described above is wound by a core material 11A in a roll shape and can be sequentially fed out. As shown in FIG. 1, the thermal head 12 is provided on the path of the master 11 unrolled from the roll in order from the roll side along the moving direction of the master 11.
And the convex portion forming means 120 are arranged respectively.

Stencil master 11 fed from the roll
Is pressed by the platen roller 13 against the thermal head 12, and the heating elements of the thermal head 12 selectively generate heat to form holes in the areas in the main scanning direction and the sub scanning direction. The thermal head 12 is adapted to set a selective heating position in the scanning direction of the heating element and a heating state at that position by energization control using a drive signal from a control unit described later. The punching state in the stencil master is changed according to the above.

As shown in FIGS. 2 and 3, the convex portion forming means 120 is a resin injection device (for convenience, referred to as an ink jet device) 121 capable of ejecting a thermosetting resin.
A heater 122, which is a heating device that heats and cures the thermosetting resin, is arranged along the moving direction of the master 11. Inkjet device 12 which is a resin injection device
In No. 1, a resin having a property of being cured at a temperature lower than the heating temperature by the thermal head 12 is jetted by a drive signal from a control unit described later. The thermosetting resin is hardened by being heated, and the degree of hardening is such that a gap between the master 11 and the printing paper S is obtained when the printing paper S is pressed by the press roller 4 and comes into contact with the printing paper S. It is set with some flexibility. Therefore, the convex portion comes into contact with the printing paper S and presses the press roller
When it is pressed by, it is deformed to some extent and spreads more than before being pressed by the press roller 4. Therefore, the injection amount of the thermosetting resin from the inkjet device 121 is determined so that the size of the image formed on the original image does not change due to the deformation. As a result, for example, in the case of a line image, its thickness does not differ from the original image. Further, the thickness obtained by the ejection amount is between the perforation of the master 11 and the printing paper when the ink exuding from the perforation formed in the master 11 comes into contact with the printing paper S by the pressing of the press roller 4. The ejection amount is set so as to be slightly lower than the height obtained by the amount of ink that oozes into the gap. This is to provide a margin for adhering ink to the surface of the convex portion. Master 11
The resin injection device 120 described above serves as an offset master unit in which a convex portion is formed on the outer surface according to the image information corresponding to the first color of the color-separated colors, and by the thermal head 12, The color-separated color is perforated according to the image information corresponding to the second color to be a stencil master section (for convenience, the composite printing master will be referred to as a stencil master 11 hereinafter).

The platen roller 13 is equipped with a stepping motor (not shown) as a drive source, and is capable of feeding the stencil master 11 in its sub-scanning direction by performing stepwise rotation. Stencil master 11
At the rear of the platen roller 13 in the feeding direction, a conveyance roller 14 capable of sandwiching and conveying the stencil master is arranged. The conveyance roller 14 can be interlocked with the stepping motor via a torque limiter (not shown), and a rotation speed at which a conveyance speed slightly higher than the conveyance speed of the stencil master 11 set by the platen roller 13 is obtained. Has been set. This allows
The stencil master 11 includes a platen roller 13 and a conveyance roller 1.
A position in which a preset tension is applied by the torque limiter in a range from a position where the thermal head 12 contacts the thermal head 12 to a position where the thermal roller 12 is sandwiched by the transport roller 14 due to a speed difference from the position where the platen roller 13 presses the thermal head 12. Also, the occurrence of slack, wrinkles, etc. at the position facing the convex portion forming means 120 is suppressed. In this case, the main scanning direction corresponds to the axial direction of the platen roller 13, and the sub-scanning direction is a direction perpendicular to the main scanning direction and corresponds to the feeding direction of the stencil master 11. The stencil master 11 which has been subjected to the convex portion forming process and the perforating process is cut into a required length by the cutter 15 and fed in the tangential direction of the plate cylinder 2 so that the leading end is gripped and fixed by the clamper. . As the configuration of the cutter 15, as shown in FIG. 1, a guillotine type having a movable blade capable of moving up and down with respect to a fixed blade located on the transport path of the stencil master 11 and a rotary blade rotatable with respect to the fixed blade are provided. A rolling type is used.

An image reading unit 100 is installed above the stencil printing apparatus 1. The image reading unit 100 is
A conveyance roller 102 disposed on both sides of the document scanning unit 101 using contact glass across the document feeding direction in the direction of the arrow, a light source 103 for illuminating a document P passing over the document scanning unit 101, and a document P. Reflected light from the color CC
Mirror 105 and lens 10 introduced toward D104
6 is provided. The original P used in this case is a multicolor original having red and black images. In the document reading section 100, the reflected light from the document P is colored C
Color separation is performed by the CD, and image information for each color is output to the control unit described later.

FIG. 2 is a block diagram for explaining the structure of the control unit. In FIG. 2, the control unit 20 is composed of a main controller 20A having a ROM and a RAM which are storage devices, and an I / O (not shown). As related to the present embodiment through the O interface, the operation unit 21 on the input side, A / D converters 22 and 23 for A / D converting document reading data from the color CCD 104, and this converter 22. , 23, and a CCD image processing unit 24 for outputting image information for each color to the control unit 20. On the output side, an inkjet driving unit 121A which is a driving unit of an inkjet device 121 which is a resin injection device.
And the heating device 122, and further the thermal head 12
The thermal head image processing units 25, which are the driving units of the above, are respectively connected.

In the control unit 20, a program for sequence control of the entire printing process stored in the ROM and image information for each color are used to form the convex portion forming process on the stencil master 11 and the punching process data. The ejection timing control to the inkjet device 121 and the energization control to the thermal head 12 are performed according to the image information for each color. In the convex portion forming means 120, pixels of a color corresponding to the first color in the main scanning direction and the sub-scanning direction are formed by jetting a dot-shaped thermosetting resin by the inkjet device 121, so-called for offset printing. A master structure of is formed.

In the thermal head 12, perforations penetrating in the thickness direction of the master 12 are formed in a dot shape by energization control, and pixels corresponding to the second color in the main scanning direction and the sub scanning direction are formed to form a stencil. A master structure for printing is formed.

As shown in FIG. 4, a projection is formed at a position downstream of the plate making section 10 in the clockwise direction of rotation of the plate cylinder 2 and in front of the position where the ink supply mechanism 3 is arranged inside the plate cylinder. The ink supply mechanism 110 to the portion 123 is arranged. The convex portion ink supply mechanism 110 is a mechanism used during multicolor printing, and in the case of the present embodiment, it supplies red ink that is applied when performing two-color printing of red and black. ing. As shown in FIG. 4, the convex portion ink supply mechanism 110 includes an ink roller 111 that can move forward and backward with respect to the surface of the plate cylinder 2 and doctor rollers 112 and 113, and ink from a supply unit (not shown) Pool 11
4 and the mixture is kneaded and then transferred to the ink roller 111. When the ink is supplied, the ink roller 111 moves toward the plate cylinder 2 and comes into contact with the surface of the convex portion 123 formed on the outer surface of the stencil master 11 to transfer the ink to the surface of the convex portion 123. It is designed to be attached.

In this embodiment, since the rotation direction of the plate cylinder 2 at the time of printing is set to the clockwise direction, the ink supply mechanism 110 for the convex portion is the first ink supply mechanism, and the plate cylinder 2 is also used. The ink supply mechanism 3 inside is a second ink supply mechanism.

In FIG. 1, a plate discharge section 3 is provided at a position facing the plate making section 10 with a vertical line passing through the center of the plate cylinder 2 interposed therebetween.
0 is arranged. The plate discharge unit 30 is configured by a pair of belts 32 that are wound around one roller 30A that is accessible to the plate cylinder 2 and the other roller 30B that is located on the plate discharge box 31 side. When the body 2 rotates counterclockwise, the rear end of the stencil master 11 is received and transferred to the plate discharge box 31. A compression member 33 that can move up and down is provided on the upper part of the plate discharge box 31 so as to compress the stencil master 11 stored in the plate discharge box 31 and prepare a storage space for the stencil master 11 to be discarded next. Has become. When the inside of the plate discharge box 31 is filled with the stencil master 11,
The stencil master 11 stored in the stencil printing machine 1 after taking out the stencil box 31 is discarded.

In FIG. 1, reference numeral 40 indicates a peeling claw for peeling the printing paper S from the plate cylinder 2, and reference numeral 41 indicates
Reference numeral 42 denotes a discharge tray for the document P, and reference numeral 42 denotes a transport device for transporting the print sheet S toward the discharge tray 43.

In this embodiment, the following procedure is executed by using the stencil printing machine having the above-mentioned structure. When a print start switch (not shown) provided on the operation unit 21 is turned on, the plate cylinder 2 rotates counterclockwise. Due to this rotation, the stencil master 11 wound on the plate cylinder 2 becomes
It is nipped by the belt 32 of No. 0, transferred to the plate discharge box 31, and removed from the plate cylinder 2. When monochrome printing is performed, the first ink supply mechanism 110
Ink roller 111 is maintained in a state of being separated from plate cylinder 2. As a result, ink is supplied only by the ink supply mechanism 3 in the plate cylinder 2 corresponding to the second ink supply mechanism. The plate cylinder 2 rotates clockwise, and the ink supply mechanism 3 corresponding to the second ink supply mechanism.
Then, the ink accumulated in the ink reservoir 3C is kneaded by the doctor roller 3B, transferred to the ink roller 3A, and permeates into the mesh screen of the plate cylinder 2.

In the plate making section 10, heat generation control of the heating elements of the thermal head 12 is performed via the control section 20 in accordance with image information from the document reading section 100, and punching processing is executed in accordance with the document image to perform stencil printing. Plate making on the master 11 is performed. Since the punching process in this case is monochrome printing, the convex portion formed by the convex portion forming means 120 (see FIGS. 1 and 3).
Is not formed, and the perforations 11D are all formed. The stencil master 11 that has been plate-made has its tip gripped and fixed by a gripper located on the plate cylinder 2, and is wound around the peripheral surface of the plate cylinder 2. When the stencil master 11 reaches the position of the ink supply mechanism 3 which is the second ink supply mechanism, the printing paper S is fed from the paper supply device 5, and the registration roller 9 sets the image transfer timing, and then the ink is transferred. Supply mechanism 3
The sheet is fed to a position opposed to and is pressed by the press roller 4 toward the surface of the plate cylinder 2. As a result, the ink that has passed through the mesh screen of the plate cylinder 2 passes through the perforations 11D of the stencil master 11 and is transferred to the surface of the printing paper S, and printing corresponding to the image transfer step is performed.

When the original is a multi-color original of two colors, in the original reading section 100, the reflected light from the original is a color CCD.
The color separation is performed and the color information is input to the control unit 20 as image information for each color via the CCD image processing unit 24. The control unit 20 controls the punching process by the thermal head 12 in the plate making unit 10 according to the image information for each color. In the present embodiment, of the image information, the perforation processing corresponding to the black image corresponding to the image information of the first color is perforated 11D (see FIG. 3).
The perforation forming step of forming the
A convex portion forming step is executed in the master forming process corresponding to the red image corresponding to the image information of the second color. The convex portion forming step is performed in a state where the convex portion 123 is exposed on the outer surface when the stencil master 11 is wound around the plate cylinder 2. The inkjet device 122 used in this embodiment needs to prevent clogging, but the blanking performed to prevent clogging does not correspond to the printing portion of the stencil master 11. It will be implemented at the time of facing the department.

Therefore, the control unit 20 controls the energization of the heating elements of the thermal head 12 through the thermal head image processing unit 25 to set the heat generation time, and also through the ink jet drive unit 121A. The injection timing at 121 is set. Thereby, the first
The perforations corresponding to the image notification of the color and the convex portion 123 corresponding to the image information of the second color are formed.

The stencil master 11 which has been subjected to the punching process is used as the plate cylinder 2.
Along with the rotation, the first ink supply process is performed so as to face the convex part ink supply mechanism 110 and receive the ink supply. In the convex portion ink supply mechanism 110, the ink roller 111 approaches the plate cylinder 2 and is located on the surface of the convex portion 1.
The ink is supplied to the surface of No. 23. As a result, the ink of the color corresponding to the second color is transferred from the ink roller 111 to the surface of the convex portion 123. First
When the ink supply step is completed, the stencil master 11 is subjected to the second ink supply step in which the ink is supplied from the ink supply mechanism 3 located inside the plate cylinder. At this time, a paper feeding process of feeding the printing paper S from the paper feeding device 5 is performed in accordance with the stencil master 11 facing the ink supply mechanism 3. In the paper feeding process, the printing paper S, the feeding timing of which is set by the registration rollers 9, is conveyed toward the plate cylinder 2 and pressed by the press roller 4 against the surface of the plate cylinder.

In the second ink supply step, the ink enters the perforations 11D communicating with the inside of the plate cylinder 2. As a result, as shown in FIG. 4, the area where the ink is attached to the surface of the convex portion and the perforation 11D in the first ink supplying step.
A region where the ink is exuded from inside is formed on the stencil master 11.

In the first and second ink supply steps, the ink located on the perforations 1D of the stencil master 11 and the projections 123 is subjected to a transfer step by pressing the printing paper S against the plate cylinder 2 by the press roller 4. As a result, it is transferred to the surface of the printing paper S. The printing paper S pressed against the surface of the plate cylinder 2 by the press roller 4 is the perforation 11D of the stencil master 11.
The ink that has exuded from the ink is transferred, and the convex portion 123 is deformed by the pressing force of the press roller 4, whereby the ink attached to the surface is transferred to the printing paper S. At this time, the convex portion 123 is deformed to have a wider width than that at the ejection timing. However, the widened width is defined in advance by the ejection amount at the time of ejection so as to have the size of the original image. Therefore, the size of the original image does not differ even if it is deformed.

After the ink is supplied in the first and second ink supply steps, the printing paper S is conveyed by the transport device 42.
And is discharged to the paper discharge tray 43.

Such a printing process is repeated as many times as the number of sheets required.

According to this embodiment, since the inks of a plurality of colors can be continuously supplied during one rotation of the plate cylinder 2, it is possible to carry out the work of re-feeding the printing paper S for each color. It becomes unnecessary.

[0049]

As described above, according to the first to fourth aspects of the invention.
In the inventions described in (6) and (6), when the perforated portion is a concave portion, an image forming portion having a contradictory form is provided on one master surface, and ink of different colors can be supplied to each portion, so that plate making can be performed once. , Multicolor printing can be done only by printing cycle, shortening the printing time in multicolor printing, eliminating the need to replace the stencil master or plate cylinder for each color, and the alignment of images for each color It is possible to improve workability.

According to the fifth aspect of the invention, since the same master is wound around a single plate cylinder, the work such as plate cylinder replacement is not necessary, and printing is performed by reducing the number of parts and printing time. Workability can be improved.

In the invention according to claim 7, a convex portion and a perforated portion are formed respectively for one master, and the master is applied to a single plate cylinder for each color during one rotation of the plate cylinder. Since the ink is supplied, and the transfer of the ink to the printing paper is performed after the supply, the ink is continuously supplied to the stencil master wound on the single plate cylinder,
Since each ink is transferred to the printing paper, 1 of the plate cylinder
It is possible to reduce the printing time and the number of parts by multicolor printing by rotation.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a main configuration of a printing apparatus used in an embodiment of the present invention.

FIG. 2 is a block diagram for explaining a configuration of a control unit of the printing apparatus shown in FIG.

FIG. 3 is a schematic diagram showing a plate making state of a stencil master used in the printing apparatus shown in FIG.

FIG. 4 is a schematic diagram for explaining a printing state according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Stencil printer 2 Plate cylinder 3 Second ink supply mechanism 5 Paper feeder 10 Plate making section 11 Stencil master 11D Perforation 12 Thermal head 20 Control section 100 Original reading section 104 Color CCD 110 First ink supply mechanism 120 Thermosetting property Inkjet device 123 that is a resin injection unit

Claims (7)

[Claims] 1. A plate making process in which a master is made according to image information, and the master is wound around the surface of a plate cylinder, and ink is supplied to print on a printing paper by transferring ink from the master. In the printing method for a multicolor original including a printing step to be performed, the plate making step is a perforation forming step of forming perforations in the thickness direction of the master according to the first image information of the image information. And a convex portion forming step of forming a convex portion on the master according to second image information of the image information, wherein the printing step is performed on the convex portion surface formed in the convex portion forming step. A first ink supply step of supplying ink, a second ink supply step of supplying ink to the perforated portion formed by the perforation forming step, and a printing paper for the second ink supply step execution section To deliver A paper process and an image transfer process of transferring a visible image corresponding to the first and second image information supplied by the first and second ink supply processes onto the printing paper. How to print. 2. The printing method according to claim 1, wherein the convex forming step forms the convex by adhering a thermosetting resin to the surface of the master. 3. The printing method according to claim 1 or 2, wherein the convex portion formed in the convex portion forming step comes into contact with the printing paper by the ink supplied in the second ink supplying step in the transferring step. A printing method, wherein the printing is performed at a height that achieves the same result as the transfer. 4. The printing method according to claim 1, wherein the second ink supplying step is performed by using an ink supplying mechanism located inside the plate cylinder. The printing method, wherein the ink supplying step is performed by using an ink supplying mechanism located near the outer surface of the master wound on the plate cylinder. 5. The printing method according to any one of claims 1 to 3, wherein the master in which the perforations and the convex portions are formed by the perforation forming step and the convex portion hole forming step is formed on a single plate cylinder. A printing method characterized by being wound. 6. The printing method according to claim 1, wherein the first and second image information used in the perforation forming step and the convex portion forming step are image information of a color separated from a multicolor original. A printing method characterized by being provided. 7. A printing apparatus using the printing method according to any one of claims 1 to 5, wherein the printing apparatus is rotatable and has a single plate cylinder having a large number of perforations formed on the surface thereof. A means for supplying the thermosetting resin to the master surface, which is provided to carry out the part forming step, a heating means for curing the thermosetting resin supplied to the master surface, and the perforation forming step. A thermal head, which is provided for the purpose of performing the first ink supply step, and is capable of contacting the same surface of the master to change the heating state; An ink supply mechanism arranged near the outer surface, an ink supply mechanism arranged in the plate cylinder for executing the second ink supply step, a convex surface and a perforated part on the plate cylinder Against the above,
After the ink is supplied in the second ink supply step, a paper feeding device that feeds the printing paper in contact with the plate cylinder, the thermosetting resin supply means, and the thermal head are on the output side. And a control unit for inputting the image information to the thermosetting resin supply unit and the thermal head according to the first and second image information. A printing device characterized by the fact that