JPH1095156A - Stencil printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To check the generation of a paper waste by preventing the generation of the bleeding, setoff, or density nonuniformity of perfecting printing, and to enable the accomplishment of printing cost reduction by conducting printing by peeling from a used master support plate and by setting a new plate-made master. SOLUTION: A plate cylinder 79 is rotated clockwise at the same circumferencial speed with the transportation speed of a master 33, and the master 33 is set on the plate cylinder 79. When a control means judged the completion of plate making for one form plate from the number of steps of a stepping motor, the rotation of a platen roller 36 and a pair of master transporting rollers 38, 39 is stopped, a movable blade 37a is rotated and moved, and the master 33 is cut. The cut master 33 is drawn out by the rotation of the cylinder 79, when the cylinder 79 reaches a home position again, a motor is stopped by a command from the control means, and the cylinder is positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stencil printing method for obtaining a printed image by leaching ink from a master made by perforation and transferring the ink to printing paper. The present invention relates to a stencil printing method using a stencil printing apparatus.

[0002]

2. Description of the Related Art A rotatable plate cylinder having a structure in which a plurality of mesh screens of a resin or metal mesh are wound around a porous support cylinder, and a thermoplastic resin film (thickness of 1 to 3 .mu.m).
And a thermoplastic resin film of the master using a laminated master in which a porous support made of Japanese paper fiber, synthetic fiber, or a mixture of Japanese paper fiber and synthetic fiber is attached to the same. The surface is heated and perforated with a thermal head, and then the plate is wound around a plate cylinder, ink is supplied to the inner peripheral surface of the plate cylinder from ink supply means provided inside the plate cylinder, and printing paper is pressed by pressing means such as a press roller. Digital thermal stencil printing, in which ink is leached from a plate cylinder opening and a master perforation by transferring the ink onto a printing paper sheet to perform printing by pressing an image on the plate cylinder, is well known.

In recent years, in stencil printing, double-sided printing, in which printing is performed on both sides of a printing sheet, has become dominant in order to reduce consumption of the printing sheet. When performing this two-sided printing using a normal printing device, the printing paper loaded in the paper feeding unit is fed to the printing unit, and after printing on one side, the printing paper is turned over and fed back to the printing unit again. However, by printing on the other side, you can obtain a double-sided printed matter,
Once the print paper has been ejected, set it again in the paper
There is a problem that work such as aligning printing paper after single-sided printing is troublesome.

[0004] In addition, since the ink on the printed material after printing is not sufficiently dried, if printing is immediately performed on the back surface, a conveying roller or a press roller is pressed against the image area, and the printed image becomes dirty. In most cases, printing on the back side is performed after several hours or more, especially if there is a solid image part, it is necessary to dry for a long time, and printing on the back side the next day Had been done.

As described above, in double-sided printing, the printing paper must be dried for a long time before printing on the back side of the printing paper, and two printing operations are performed. Takes twice as long as
There was a problem that it took too much time.

Therefore, a pair of plate cylinders are arranged facing each other,
A stencil printing apparatus capable of forming a print image on both sides of printing paper in one process by pressing the plate cylinders against each other is disclosed in, for example, JP-A-6-71996 and JP-A-6-135111. It has been disclosed.

[0007]

In the stencil printing apparatus described above, after the printing by the previous master (printed master) is completed, the perforating and stencil making of the next original is performed, and the new master is automatically placed on the plate cylinder. And is configured to proceed to the next printing. When printing is performed continuously in this manner, a sufficient amount of ink is held in the support cylinder of the plate cylinder and the mesh screen, so that ink can be reliably supplied even when a new master is wound. As a result, a good printed matter can be obtained from the first sheet.

However, after leaving the printing apparatus for a long time,
When printing is performed by winding a new master around the plate cylinder, the water in the ink held on the support cylinder of the plate cylinder and the mesh screen evaporates, the volume of the ink decreases, and the newly wound cylinder is newly wound. It takes time for the ink to permeate the porous support of the master and exude from the perforated portion of the thermoplastic resin film.

The above-described ink in which the water has evaporated has a reduced viscosity and is in a sticky state. Even if the ink oozes out of the perforated portion of the thermoplastic resin film and is transferred to printing paper, bleeding or set-off occurs. In particular, in double-sided printing having images on both sides of printing paper, a good printed matter cannot be obtained until the ink whose viscosity has decreased is consumed, and good printing on a new master is performed. There has been a problem that several to several tens of waste sheets are generated before the ink for supplying an image is supplied.

[0010] Further, on the surface of the mesh screen after standing, there is unevenness in the density of ink corresponding to the previous image.
In particular, when there is a solid image in the previous image, the boundary is remarkably left, and when a new master is wound and printing is performed, there is a problem that density unevenness occurs in the printed image. .

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to reduce the printing cost by preventing the occurrence of bleeding, set-off or uneven density in double-sided printing to minimize the occurrence of waste paper. It is an object of the present invention to provide a printing method which can perform the following.

[0012]

According to the first aspect of the present invention,
A first plate cylinder having a first master support plate having flexibility; and a second master support plate having flexibility, having a peripheral surface close to the first plate cylinder. A first ink having a second plate cylinder provided and a first ink roller provided inside the first plate cylinder and rotatable by pressing against an inner peripheral surface of a first master support plate; Supply means, second ink supply means having a second ink roller provided inside the second plate cylinder and rotatable by pressing against the inner peripheral surface of the second master support plate, and printing end Clock means for measuring the time elapsed from the time, and one of the first and second ink rollers is connected to the first or second ink supply means by the first or second master support plate. One-step double-sided printing supported movably at a separated position away from the inner peripheral surface and at a press-contact position pressed against the inner peripheral surface A stencil printing method using a stencil printing apparatus capable of performing the above-mentioned elapsed time when the next printing is performed from a state in which a printed master is wound around each of the first and second master support plates. When a predetermined time has passed, the first and second master support plates are expanded by moving the one of the ink rollers from the separated position to the pressure contact position, thereby expanding the first and second master support plates. The plate cylinders are pressed against each other via the printed master and rotated a predetermined number of times, and then the printed master is peeled off from the first and second master support plates, respectively, and the first and second master support plates are separated. The printing is performed by winding a new plate-making master on each plate.

According to a second aspect of the present invention, there is provided a first plate cylinder having a first master support plate having flexibility, and a second master support plate having flexibility. A second plate cylinder arranged with its peripheral surface close to the plate cylinder, a first separation position provided inside the first plate cylinder and separated from the inner peripheral surface of the first master support plate. A first ink roller that selectively occupies a first pressure contact position that presses against the inner peripheral surface;
A first ink supply means for supplying ink to the second plate cylinder, a second spaced position provided inside the second plate cylinder and separated from the inner peripheral surface of the second master support plate, and 2nd press
A second ink supply means for selectively occupying the pressure contact position of the first ink roller and a second ink roller facing the first ink roller, for supplying ink to the second plate cylinder, and a first ink roller First ink roller moving means for moving the second ink roller from the second separated position to the second pressed position, and a second ink roller moving means for moving the second ink roller from the second separated position to the second pressed position. A stencil printing apparatus using a stencil printing apparatus capable of performing one-step double-sided printing, comprising: When the next printing is performed from a state in which the printed master is wound on each of the plates, when the elapsed time exceeds an arbitrary predetermined time, the first and second ink roller moving means are operated to operate the first and second ink roller moving means. 1 and 2 The first and second plate cylinders are pressed against each other via the printed master by moving the roller to the first and second press contact positions and expanding the first and second master support plates, respectively. Then, the printed master is peeled off from the first and second master support plates, and the new masters are wound around the first and second master support plates, respectively. Printing is performed.

According to a third aspect of the present invention, a master is wound around an outer peripheral surface and is rotatable around its rotation axis, and a master is wound around an outer peripheral surface and around the rotation axis. A second plate cylinder rotatable in the first direction, contacting / separating means for moving the outer peripheral surface of the first plate cylinder and the outer peripheral surface of the second plate cylinder toward and away from each other, and timing the time elapsed from the end of printing. Stencil printing method using a stencil printing apparatus capable of performing one-step double-sided printing, wherein printed masters are wound around the outer peripheral surfaces of first and second plate cylinders, respectively. When the next printing is performed, when the elapsed time exceeds an arbitrary predetermined time, the first and second plate cylinders are pressed against each other via the printed master by operating the contact / separation means. Together with each other for a predetermined number of times. Detached respectively from the outer peripheral surface of the plate cylinder, and performing printing by winding each new stencil master on the outer peripheral surfaces of the first and second plate cylinder.

According to a fourth aspect of the present invention, a first plate cylinder having a first master support plate having flexibility and a second master support plate having flexibility are provided, and the first plate cylinder is provided with a first master support plate having flexibility. A second plate cylinder arranged with its peripheral surface close to the plate cylinder, and rotatable by pressing against the inner peripheral surface of a first master support plate provided inside the first plate cylinder. A first ink supply means having a first ink roller, and a second ink supply means provided inside a second plate cylinder.
A second ink supply means having a second ink roller which can be rotated while being pressed against the inner peripheral surface of the master support plate, and a time measuring means for measuring an elapsed time from the end of printing, One of the second ink rollers is provided to the first or second ink supply means at a separated position away from the inner peripheral surface of the first or second master support plate, and at a pressing position at which the inner peripheral surface is pressed. Stencil printing method using a stencil printing apparatus capable of performing one-step double-sided printing supported movably on the first and second master support plates, in which printed masters are respectively wound. When the next printing is performed, when the elapsed time exceeds an arbitrary predetermined time, after the printed master is separated from the first and second master support plates, the one ink roller is The pressure from the separated position The move to the position 1 or 2
The first and second master support plates are expanded so that the first and second
The plate cylinders are pressed against each other and rotated by a predetermined number of times, and thereafter, printing is performed by winding new plate-making masters on the first and second master support plates, respectively.

According to a fifth aspect of the present invention, there is provided a first plate cylinder having a first master support plate having flexibility, and a second master support plate having flexibility. A second plate cylinder arranged with its peripheral surface close to the plate cylinder, a first separation position provided inside the first plate cylinder and separated from the inner peripheral surface of the first master support plate. A first ink roller that selectively occupies a first pressure contact position that presses against the inner peripheral surface;
A first ink supply means for supplying ink to the second plate cylinder, a second spaced position provided inside the second plate cylinder and separated from the inner peripheral surface of the second master support plate, and 2nd press
A second ink supply means for selectively occupying the pressure contact position of the first ink roller and a second ink roller facing the first ink roller, for supplying ink to the second plate cylinder, and a first ink roller First ink roller moving means for moving the second ink roller from the second separated position to the second pressed position, and a second ink roller moving means for moving the second ink roller from the second separated position to the second pressed position. A stencil printing apparatus using a stencil printing apparatus capable of performing one-step double-sided printing, comprising: When the next printing is performed from the state where the printed master is wound on the board, when the elapsed time exceeds an arbitrary predetermined time, the printed master is moved from the first and second master supporting plates. Peel off each Thereafter, the first and second ink rollers are moved to the first and second pressed positions by operating the first and second ink roller moving means, respectively, and the first and second master support plates are expanded respectively. Then, the first and second plate cylinders are pressed against each other and rotated by a predetermined number of times, respectively, and thereafter, the first and second master support plates are wound with new plate-making masters, and printing is performed. It is characterized by the following.

According to a sixth aspect of the present invention, a master is wound around an outer peripheral surface, and a first plate cylinder rotatable around a rotation axis thereof, and a master is wound around an outer peripheral surface, and is rotatable around the rotation axis. A second plate cylinder rotatable in the first direction, contacting / separating means for moving the outer peripheral surface of the first plate cylinder and the outer peripheral surface of the second plate cylinder toward and away from each other, and timing the time elapsed from the end of printing. Stencil printing method using a stencil printing apparatus capable of performing one-step double-sided printing, wherein printed masters are wound around the outer peripheral surfaces of first and second plate cylinders, respectively. When the next printing is performed, when the elapsed time exceeds an arbitrary predetermined time, the printed master is separated from the outer peripheral surfaces of the first and second plate cylinders, and then the contacting / separating unit is moved. Actuate to press the first and second plate cylinders against each other and rotate them a predetermined number of times It was, then, and performing printing by winding each new stencil master on the outer peripheral surfaces of the first and second plate cylinder.

According to a seventh aspect of the present invention, there is provided a first plate cylinder having a first master support plate having flexibility, and a second master support plate having flexibility. A second plate cylinder arranged with its peripheral surface close to the plate cylinder, and rotatable by pressing against the inner peripheral surface of a first master support plate provided inside the first plate cylinder. A first ink supply means having a first ink roller, and a second ink supply means provided inside a second plate cylinder.
A second ink supply means having a second ink roller which can be rotated while being pressed against the inner peripheral surface of the master support plate, and a time measuring means for measuring an elapsed time from the end of printing, One of the second ink rollers is provided to the first or second ink supply means at a separated position away from the inner peripheral surface of the first or second master support plate, and at a pressing position at which the inner peripheral surface is pressed. Stencil printing method using a stencil printing apparatus capable of performing one-step double-sided printing supported movably on the first and second master support plates, in which printed masters are respectively wound. When the next printing is performed, when the elapsed time exceeds an arbitrary predetermined time, the first or second master support plate is moved by moving the one ink roller from the separated position to the pressure contact position. By swelling The first and second plate cylinders are pressed against each other via the printed master and rotated a predetermined number of times, respectively, and then, after the printed master is peeled off from the first and second master support plates, respectively, The one ink roller is moved from the separation position to the pressure contact position, and the first and second plate cylinders are pressed against each other and rotated a predetermined number of times, respectively.
And printing is performed by winding a new plate-making master on the second master support plate.

According to the present invention, the first plate cylinder having a first master support plate having flexibility and the second master support plate having flexibility are provided. A second plate cylinder arranged with its peripheral surface close to the plate cylinder, a first separation position provided inside the first plate cylinder and separated from the inner peripheral surface of the first master support plate. A first ink roller that selectively occupies a first pressure contact position that presses against the inner peripheral surface;
A first ink supply means for supplying ink to the second plate cylinder, a second spaced position provided inside the second plate cylinder and separated from the inner peripheral surface of the second master support plate, and 2nd press
A second ink supply means for selectively occupying the pressure contact position of the first ink roller and a second ink roller facing the first ink roller, for supplying ink to the second plate cylinder, and a first ink roller First ink roller moving means for moving the second ink roller from the second separated position to the second pressed position, and a second ink roller moving means for moving the second ink roller from the second separated position to the second pressed position. A stencil printing apparatus using a stencil printing apparatus capable of performing one-step double-sided printing, comprising: When the next printing is performed from a state in which the printed master is wound on each of the plates, when the elapsed time exceeds an arbitrary predetermined time, the first and second ink roller moving means are operated to operate the first and second ink roller moving means. 1 and 2 The first and second plate cylinders are pressed against each other via the printed master by moving the roller to the first and second press contact positions and expanding the first and second master support plates, respectively. Then, the printed master is peeled off from the first and second master support plates, respectively, and then the first and second ink roller moving means are operated again to rotate the first and second ink rollers. The second ink roller is moved to the first and second pressing positions, respectively, and the first and second plate cylinders are pressed against each other and rotated a predetermined number of times, respectively. It is characterized in that printing is performed by winding a new plate-making master.

According to a ninth aspect of the present invention, a master is wound around an outer peripheral surface and is rotatable around its rotation axis, and a master is wound around an outer peripheral surface and around the rotation axis. A second plate cylinder rotatable in the first direction, contacting / separating means for moving the outer peripheral surface of the first plate cylinder and the outer peripheral surface of the second plate cylinder toward and away from each other, and timing the time elapsed from the end of printing. Stencil printing method using a stencil printing apparatus capable of performing one-step double-sided printing, wherein printed masters are wound around the outer peripheral surfaces of first and second plate cylinders, respectively. When the next printing is performed, when the elapsed time exceeds an arbitrary predetermined time, the first and second plate cylinders are pressed against each other via the printed master by operating the contact / separation means. Together with each other for a predetermined number of times. After being separated from the outer peripheral surface of the plate cylinder, the first and second plate cylinders are pressed against each other and rotated a predetermined number of times by operating the contact / separation means again, and thereafter, the first and second plate are rotated. It is characterized in that a new plate-making master is wound around the outer peripheral surface of the cylinder and printing is performed.

According to a tenth aspect of the present invention, there is provided a first plate cylinder having a first master support plate having flexibility, and a second master support plate having flexibility. A second plate cylinder arranged with its peripheral surface close to the plate cylinder, and rotatable by pressing against the inner peripheral surface of a first master support plate provided inside the first plate cylinder. A first ink supply unit having a first ink roller, and a second ink roller provided inside the second plate cylinder and rotatable by pressing against an inner peripheral surface of a second master support plate. A second ink supply unit, and a timer unit for counting an elapsed time from the end of printing.
Either the first or second ink roller is the first ink roller.
Alternatively, the one-step double-sided printing, which is movably supported by the second ink supply means at a separated position separated from the inner peripheral surface of the first or second master support plate and a pressure contact position pressed against the inner peripheral surface, is performed. A stencil printing method using a stencil printing apparatus capable of performing the above-mentioned elapsed time when the next printing is performed from a state in which a printed master is wound around each of the first and second master support plates. Exceeds a predetermined time,
After peeling the printed master from the first and second master support plates, respectively, a new blank master is wound around each of the first and second master support plates, and the one ink roller is moved from the separated position to the above-mentioned ink roller. By moving to the pressing position and expanding the first or second master support plate, the first and second plate cylinders are pressed against each other via the unmade plate master and rotated a predetermined number of times, respectively.
Thereafter, the blank masters are peeled off from the first and second master support plates, respectively, and printing is performed by winding new masters on the first and second master support plates, respectively.

According to an eleventh aspect of the present invention, there is provided a first plate cylinder having a first master support plate having flexibility and a second master support plate having flexibility. A second plate cylinder arranged with its peripheral surface close to the plate cylinder, a first separation position provided inside the first plate cylinder and separated from the inner peripheral surface of the first master support plate. First ink supply means for selectively supplying an ink to a first plate cylinder, the first ink roller having a first ink roller selectively occupying a first pressure contact position in contact with the inner peripheral surface;
A first separation member provided inside the second plate cylinder and selectively occupying a second separation position separated from the inner peripheral surface of the second master support plate and a second pressed position pressed against the inner peripheral surface; Second ink supply means for supplying ink to the second plate cylinder having a second ink roller opposed to the first ink roller, and a first pressure contact position between the first ink roller and the first separated position. First ink roller moving means for moving the second ink roller from the second separation position to the second pressure contact position, and time elapsed since the end of printing. A stencil printing method using a stencil printing apparatus capable of performing one-step double-sided printing, wherein a printed master is wound on each of a first and a second master support plate. When the next printing is performed from When the time exceeds an arbitrary predetermined time, a new blank master is wound around each of the first and second master support plates after peeling the printed master from the first and second master support plates, respectively, First and second
The first and second ink rollers are respectively moved to the first and second pressure contact positions by operating the ink roller moving means of (1), and the first and second master support plates are respectively expanded, whereby the first and second master support plates are expanded. And the second plate cylinder are pressed against each other via the unplated master and rotated by a predetermined number of times, respectively.
And printing is performed by winding new plate-making masters on the first and second master support plates, respectively.

According to a twelfth aspect of the present invention, a master is wound on an outer peripheral surface and is rotatable around a rotation axis thereof, and a master is wound on an outer peripheral surface and is rotatable around the rotation axis. A second plate cylinder rotatable in the first direction, contacting / separating means for moving the outer peripheral surface of the first plate cylinder and the outer peripheral surface of the second plate cylinder toward and away from each other, and timing the time elapsed from the end of printing. Stencil printing method using a stencil printing apparatus capable of performing one-step double-sided printing, wherein printed masters are wound around the outer peripheral surfaces of first and second plate cylinders, respectively. When the next printing is performed from the above, when the elapsed time exceeds an arbitrary predetermined time, the printed master is peeled off from the outer peripheral surfaces of the first and second plate cylinders, respectively, and then the first and second printing are performed. A new blank master is wound around the outer peripheral surface of the plate cylinder, and the contact / separation means is operated. 1 and the second plate cylinder via the non-plate-making master is rotated by each predetermined number of times causes pressure contact with each other, then the non platemaking master first and second
The printing is performed by peeling off from the outer peripheral surface of the plate cylinder, and winding a new plate-making master on the outer peripheral surface of each of the first and second plate cylinders.

According to a thirteenth aspect of the present invention, there is provided the stencil printing method according to any one of the first to twelfth aspects, further comprising a step of pressing the first plate cylinder and the second plate cylinder. Wherein the number of rotations of the first and second plate cylinders is controlled in accordance with the length of the elapsed time.

According to a fourteenth aspect of the present invention, in the stencil printing method according to the thirteenth aspect, the stencil printing apparatus further comprises a temperature detecting means for detecting a temperature inside the apparatus.
The number of rotations of the first and second plate cylinders at the time of press-contact between the plate cylinder and the second plate cylinder is corrected based on the temperature detected by the temperature detecting means.

According to a fifteenth aspect of the present invention, in the stencil printing method of the fourteenth aspect, the stencil printing apparatus further comprises a humidity detecting means for detecting humidity inside the apparatus.
The number of rotations of the first and second plate cylinders at the time of press-contact between the plate cylinder and the second plate cylinder is corrected based on the temperature detected by the temperature detection unit and the humidity detected by the humidity detection unit. It is characterized by the following.

[0027]

FIG. 1 is a schematic side view of a stencil printing machine 1 used in the first to fourth embodiments of the present invention.
In the figure, a stencil printing apparatus 1 includes an image reading unit 2, a paper feeding unit 3, a first plate making unit 4, a second plate making unit 5, a first plate discharging unit 6, a second plate discharging unit 7, a sheet discharging unit 8, a printing unit 8. It mainly comprises a unit 9 and a control unit 10.

The image reading section 2 is provided on the upper part of the housing 23. The image reading unit 2 includes a contact glass 11 on which a document is placed, a pair of document transport rollers 12 and a document transport roller 13 for transporting the document, guide plates 14 and 15 for guiding the transported document, and a document along the contact glass 11. , A switching plate 17 for switching the discharge direction of the read original, reflection mirrors 18 and 19 for scanning and reading the original image, and a fluorescent lamp 20,
It mainly includes a lens 21 for focusing the scanned image, an image sensor 22 such as a CCD for processing the focused image, and the like.

The paper feed unit 3 is provided in the middle of the right side of the housing 23. The paper supply unit 3 includes a paper supply tray 24 on which the print papers P are stacked, a paper supply roller 25 for feeding the print papers P one by one, separation rollers 26 and 27, and a guide plate for guiding the print papers P to be fed. 28, 29, a pair of registration rollers 30 to be fed after the leading edge of the fed printing paper P is gripped and timed, and guide plates 31, 32 for guiding the printing paper P fed by the pair of registration rollers 30. It is mainly composed of

A first plate making section 4 is provided above the sheet feeding section 3. The first plate making section 4 includes a master roll 34 formed by winding the master 33 into a roll, a thermal head 35 for heating and perforating the master 33, a platen roller 36 for pressing and transporting the master 33 against the thermal head 35, and a master. It mainly comprises cutting means 37 for cutting the master 33, a pair of master transport rollers 38 and 39 for transporting the master 33, and the like.

The master roll 34 has its core 34a rotatably supported by a support member (not shown). The platen roller 36 is driven to rotate by a stepping motor (not shown). The cutting means 37 includes a movable blade 37a.
Rotates or moves up and down with respect to the fixed blade 37b.

The second plate-making section 5 is provided in the middle of the left side of the housing 23. Similarly to the first plate making section 4, the second plate making section 5 is formed by winding the master 40 in a roll shape, and the core section 41a is formed.
Is rotatably supported by a support member (not shown), a master roll 41, a thermal head 42, and a platen roller 4 rotationally driven by a stepping motor (not shown).
3. Cutting means 4 composed of movable blade 44a and fixed blade 44b
4. It is mainly composed of a pair of master transport rollers 45, 46 and the like.

A first plate discharging section 6 is provided above the second plate making section 5. The first plate discharging section 6 mainly includes an upper plate discharging member 47, a lower plate discharging member 48, a plate discharging box 49, a compression plate 50, and the like.

The upper plate discharging member 47 is composed of a driving roller 51, a driven roller 52, and an endless belt 53. When the driving roller 51 rotates clockwise in FIG. 1, the endless belt 53 moves in the direction of the arrow in FIG. . The lower plate discharging member 48 is also similar to the upper plate discharging member 47 in that the drive roller 5
4. The driving roller 54 is rotated in a counterclockwise direction in FIG. 1 to move the endless belt 56 in the direction of the arrow in the figure. Further, the lower plate discharging member 48 is provided movably by a moving means (not shown), and is selectively provided at a position shown in FIG. 1 and a position at which the outer peripheral surface of the drive roller 54 abuts the outer peripheral surface of a plate cylinder 79 described later. Positioned. Plate cylinder 79
A plate discharging box 49 for storing the printed master 167 peeled from the outer peripheral surface of the housing 23 is detachably provided to the housing 23. The compression plate 50 for pushing the printed master 167 into the plate discharge box 49 is supported by a vertically moving means (not shown) so as to be vertically movable.

A second plate discharging section 7 is provided below and to the right of the second plate making section 5. Similarly to the first plate discharging section 6, the second plate discharging section 7 includes an upper plate discharging member 57, a lower plate discharging member 58, and a plate discharging box 5.
9, mainly composed of a compression plate 60 and the like.

The upper plate discharging member 57 and the lower plate discharging member 58 are, like the upper plate discharging member 47 and the lower plate discharging member 48, a driving roller 61, a driven roller 62, an endless belt 63, and a driving roller 64, a driven roller 65, an endless belt. 66, and each drive roller 61, 64
, The endless belts 63 and 66 move in the direction of the arrow in the figure. The lower plate discharging member 58 is movably provided by a moving means (not shown), and is selectively provided at a position shown in FIG. 1 and a position at which the outer peripheral surface of the drive roller 64 contacts the outer peripheral surface of the plate cylinder 80 described later. Positioned. Plate cylinder 80
The plate discharge box 59 for storing the printed master 168 peeled off from the outer peripheral surface of the plate is detachable from the housing 23, and the compression plate 60 is moved up and down by a lifting means (not shown).

A paper discharge section 8 is provided between the second plate making section 5 and the first plate discharge section 6. The paper discharge unit 8 includes peeling claws 67 and 6.
8, mainly comprising guide plates 69 and 70, a paper discharge conveying member 71, and a paper discharge tray 72.

A peeling claw 67 for peeling the printed printing paper P from the outer peripheral surface of the plate cylinder 79 is rotatably supported by a side plate (not shown) of the housing 23, and its tip is formed on the outer peripheral surface of the plate cylinder 79. Are provided so as to be able to move forward and backward. The peeling claw 68 is also rotatably supported by a side plate (not shown) of the housing 23 similarly to the peeling claw 67, and its tip is provided so as to be able to advance and retreat with respect to the outer peripheral surface of the plate cylinder 80. Guide plates 69 and 70 fixed to side plates (not shown) of the housing 23 guide the conveyance of the printed printing paper P peeled by the peeling claws 67 and 68. Drive roller 73, driven roller 7
4, a paper discharge conveyance member 71 composed of an endless belt 75 and a suction fan 76 sucks the printing paper P onto the endless belt 75 by the suction force of the suction fan 76, and
The printing paper P is transported in the direction of the arrow in FIG. A paper discharge tray 72 on which the print paper P conveyed by the paper discharge conveyance member 71 is stacked has a pair of side fences movable in the width direction of the print paper P (a direction orthogonal to the conveyance direction of the print paper P). 77 and an end fence 78, and can be stored inside the housing 23 by folding.

The printing section 9 is provided at the center of the housing 23. The printing unit 9 mainly includes a plate cylinder 79 as a first plate cylinder, a plate cylinder 80 as a second plate cylinder, a plate cylinder driving unit 81, and the like.

The plate cylinder 79 has at its center a support shaft 82 also serving as an ink supply pipe, a porous support plate 83 serving as a first master support plate on its outer peripheral surface, and a second support shaft 82 inside thereof. The first ink supply means 84 as the first ink supply means;
And an ink roller moving means 91 as an ink roller moving means.

As shown in FIG. 2, flanges 85, 85 having a symmetrical shape are provided near both ends of the support shaft 82.
It is rotatably mounted via bearings. As shown in FIGS. 3 and 4, the flange 85 has a flat portion 85 a on a part of the peripheral surface thereof, and a hole 85 b formed at the center thereof at a size larger than the outer shape of the support shaft 82. Are drilled. Further, a cam portion 85 c having a shape similar to the outer shape of the flange 85 is formed inside the flange 85.

As shown in FIG. 5, each of the flanges 85 has an identical gear 8 inside the cam portions 85c.
7 and 142 are attached, respectively, and the flanges 85 and 85 are rotatably attached to the support shaft 82 by bearings 88 and 88 attached to the gears 87 and 142, respectively.

Each of the flanges 85, 85 is
a, 85a are attached to the support shaft 82 so as to be on the same plane, and as shown in FIG.
a stage 86 having a bent portion 86b at one end
Is attached by a method such as screwing. Two hook-shaped claws 86a, 86a are fixed on the stage 86 at a predetermined interval.

A porous support plate 83 is wound on the outer peripheral surface of each of the flanges 85, 85 in such a manner that both end portions thereof come into contact with each other. The porous support plate 83, which is made of a thin metal plate and has a large number of perforations on its surface,
a, 86a are provided at the positions corresponding to the holes 83a, 83a, and the holes 83a, 83a are respectively inserted into the claws 86a, 86a.
, And the rear end is sandwiched between the respective peripheral surfaces of the flanges 85 and 85 and the bent portion 86b. With this configuration,
When a stress is applied to the porous support plate 83 in the radial direction of the plate cylinder 79 from the inside of the plate cylinder 79, the peripheral surface thereof can easily bulge from the peripheral surface of the flange 85.

A mesh screen 89 is wound around the outer peripheral surface of the porous support plate 83, as shown in FIG. A thin plate-shaped mounting plate 89a is attached to one end of a mesh screen 89 made of resin or a metal net, and a thin plate-shaped movable plate 89b is attached to the other end. The mounting plate 89a is fixed on the stage 86 by screws or the like, and the movable plate 89b is movably mounted on the stage 86 via tension springs 89c, 89c. With this configuration, the mesh screen 89 can bulge out of the peripheral surface of the flange 85 similarly to the porous support plate 83.

On the stage section 86, a clamper 90 for holding the leading end of the master 33 is provided. Clamper 90 whose base end is rotatably supported by stage section 86
Has a magnet (not shown) at its free end, and is provided so as to be magnetically attached to the stage 86. The clamper 90 is opened and closed by opening and closing means (not shown) when the plate cylinder 79 stops at a predetermined position.

As shown in FIGS. 5 and 7, an ink supply means 84 and an ink roller moving means 91 are provided inside the plate cylinder 79.
And are arranged. The ink supply means 84 includes the base 9
2, 92, the first support member 93, the second support member 94, the first
The ink roller moving means 91 is mainly composed of a support plate 97, a solenoid 98, a stopper 99 and the like.

The base 92 made of a plate material is connected to each flange 8.
The two shafts 82 are arranged at predetermined intervals on the support shaft 82 located inside of the support shafts 5 and 85, and are fixed to the support shaft 82 by two mounting members 100 and 100, respectively.

A first support member 93 is provided between the bases 92. As shown in FIG. 8, the first support member 93 has ears 93a, 93a having holes 93b at both end portions thereof, and a swing shaft 102 at the center thereof.
The hole 93c through which is inserted and fixed is formed. The first support member 93 is rotatably supported by the bases 92, 92 by a support shaft 101 inserted between the holes 93b, 93b.

A tension spring 104 having each end fixed to the base 92 and the first support member 93 is stretched between the base 92 and the first support member 93. The first support member 93 is provided with a biasing force in the counterclockwise direction in FIG. 7 around the support shaft 101 by the biasing force of 104. The urging force of the tension spring 104 is set to be stronger than the urging forces of the tension springs 89c, 89c.

The second support member 94 includes the bases 92 and 92
It is mainly composed of two side plates 94a, 94a arranged outside of the frame, a reinforcing member 94b connecting the side plates 94a, 94a, and a locking rod 94c provided between the side plates 94a, 94a. I have. The second support member 94 includes a reinforcing member 94b.
Are swingably supported by a swing shaft 102 by a bearing 94d disposed at the center of the shaft.

An ink roller 95 is provided between the side plates 94a, 94a. The ink roller 95 is rotatably supported on each of the side plates 94a, 94a by a support shaft 95a, and is driven to rotate in the same direction as the plate cylinder 79 by driving means (not shown). Also, at both ends of the support shaft 95a,
Cam followers 95b, 95b that are in contact with the cam portion 85c are provided. When the cam followers 95b, 95b abut against the convex portions of the cam portions 85c, 85c, the outer peripheral surface of the ink roller 95 is separated from the inner peripheral surface of the porous support plate 83, and the respective cam followers 95b, 95b are separated. The outer peripheral surfaces of the cam portions 85c, 85c are configured to protrude from the outer peripheral surfaces of the flanges 85, 85 when leaving the convex portions.

A doctor roller 96 is provided near the ink roller 95. The outer peripheral surface of the doctor roller 9 is disposed close to the outer peripheral surface of the ink roller 95.
Numeral 6 is rotatably supported by the side plates 94a, 94a, and is driven to rotate in the opposite direction to the ink roller 95 by driving means (not shown). In the vicinity of the outer peripheral surface of the ink roller 95 and the outer peripheral surface of the doctor roller 96,
The ink supplied through the support shaft 82 and an ink supply pipe 129 described later causes a wedge-shaped ink reservoir 96a to be formed.
Is formed.

A sensor 170 for detecting the amount of ink in the ink pool 96a is provided above the ink pool 96a. The sensor 170 is fixed to the side plate 94a by a fixing member (not shown).

The support plate 97 is fixed on a support shaft 82 located at a substantially central portion between the bases 92 by an attachment member (not shown) similar to the attachment member 100. Support plate 9
7, a reflection type sensor 152 for detecting the position of the ink roller 95 from the positions of the solenoid 98, the stopper 99, and the locking rod 94c is attached.

The stopper 99 which has an L-shape and one end 99a of which is bent outward in a hook shape and which can be engaged with the locking rod 94c, has its bent portion 99b supported by the support shaft 97 by the support shaft 97. And is connected to the plunger 98a of the solenoid 98 at an elongated hole 99c formed between one end 99a and the bent portion 99b. The stopper 99 is urged by urging means (not shown).
7, a clockwise rotational urging force is applied in FIG.

Below the plate cylinder 79, a plate cylinder 80 is provided. The plate cylinder 80 includes a support shaft 10 serving also as an ink supply pipe.
5 at its center, a porous support plate 106 serving as a second master support plate on its outer peripheral surface, and a second support plate inside thereof.
Ink supply means 107 as the second ink supply means and the second
And an ink roller moving means 108 as an ink roller moving means. The plate cylinder 80 is provided at a position where the outer peripheral surface of the porous support plate 106 is separated from the outer peripheral surface of the porous support plate 83 by a predetermined distance (about 2 to 3 mm).

The flange 8 is located near both ends of the support shaft 105.
Flange 10 having substantially the same shape and substantially symmetrical shape as 5
9, 110 are rotatably mounted via bearings. Compared to the flange 85, the flanges 109 and 110 are provided with a boss 10 inside the central portion thereof, as shown in FIG.
9a and 110b, and has a flat portion (not shown) and cam portions 109b and 110b.
In each of having the following. Each boss 10
9a and 110a are provided with gears 111 and 143 of the same shape, respectively.
10 is a support shaft 1 by a bearing 112 attached to the gear 143 and a bearing 113 attached to the flange 110.
05 are attached rotatably.

Each of the flanges 109 and 110 is connected to the flange 8.
Similarly to FIGS. 5 and 85, each flat portion is attached to the support shaft 105 so as to be coplanar, and a stage portion having a claw portion and a clamper 114 (not shown) is attached to each flat portion. Similarly to the plate cylinder 79, a porous support plate 106 and a mesh screen (not shown) are provided on the outer peripheral surfaces of the flanges 109 and 110.
It is wound so that it may protrude from the outer peripheral surface of 9,110.

The ink supply means 107 is provided inside the plate cylinder 80.
And ink roller moving means 108 are provided.
The ink supply means 107 mainly includes a base 115, an ink roller support member 116, an ink roller 117 as a second ink roller, and a doctor roller 118. The ink roller moving means 108 includes
19, a solenoid 120, a stopper 121 and the like.

As shown in FIG. 9, the base 115 has side walls 115a, 115a at both ends, and each of the side walls 115a, 115a has a substantially U-shape.
Grooves 115b into which the holes 05 can be fitted are formed. A bar-shaped reinforcing member 115c for preventing the side walls 115a, 115a from falling down is attached to the front end side between the side walls 115a, 115a.
A cutout 115d is formed at the center of the front end of 15. The base 115 is configured such that each groove 115b, 115b is
In a state fitted to the mounting member 05, the mounting member 100 is fixed by a mounting member (not shown) similar to the mounting member 100.

The ink roller support member 116 has two side plates 1 disposed outside the side walls 115a, 115a.
16a, 116a, a connecting rod 116b for connecting the side plates 116a, 116a, and a locking rod 116c provided between the side plates 116a, 116a. It is supported by. Also, the base 115 and the ink roller supporting member 1
The tension springs 12 fixed at their ends to the base 115 and the ink roller support member 116, respectively.
The support shaft 122 is attached to the ink roller support member 116 by the urging force of the tension spring 123.
7, a clockwise rotational urging force is applied in FIG. The urging force of the tension spring 123 is the tension spring 1
It is set so as to be stronger than the urging force of 04.

An ink roller 117 is provided between the side plates 116a, 116a. Ink roller 117
Is rotatably supported by the side plates 116a, 116a by a support shaft 117a, and is driven to rotate in the same direction as the plate cylinder 80 by driving means (not shown). Also, the support shaft 11
At both ends of 7a, cam followers 117b, 117b that are in contact with the cam portions 109b, 110b are provided.
The ink roller 117 is provided with each cam follower 117b, 1
When the projection 17b comes into contact with the projections of the cam portions 109b and 110b, the outer peripheral surface thereof is separated from the inner peripheral surface of the porous support plate 106, and the respective cam followers 117b and 117b are in contact with the concave portions of the respective cam portions 109b and 110b. When it comes into contact, the outer peripheral surface is configured to protrude from the outer peripheral surface of each of the flanges 109 and 110.

A doctor roller 118 is provided near the ink roller 117. A doctor roller 118 whose outer peripheral surface is disposed close to the outer peripheral surface of the ink roller 117 is rotatably supported by each of the side plates 116a, 116a, and is driven to rotate in a direction opposite to that of the ink roller 117 by driving means (not shown). In the vicinity of the outer peripheral surface of the ink roller 117 and the outer peripheral surface of the doctor roller 118, a wedge-shaped ink reservoir 118a is formed by the ink supplied through the support shaft 105 and an ink supply pipe 130 described later.

A sensor 171 for detecting the amount of ink in the ink reservoir 118a is provided above the ink reservoir 118a. The sensor 171 is fixed to the side plate 116a by a fixing member (not shown).

A support member 119 formed by bending a plate material
Is attached to the inner surface of the base 115 by screws or the like, and a solenoid 120 is attached to the support member 119.

As shown in FIG. 10, the stopper 121 includes legs 121a, 121a, a protrusion 121b, and a tongue piece 1.
21c and a connecting rod 121d are integrally provided, and the legs 121a, 121a are rotatably supported by support shafts 125 on brackets 124, 124 fixed to the base 115. A tension spring 126 is provided between each leg 121a, 121a and each bracket 124, 124.
The stopper 121 is provided with a biasing force in the counterclockwise direction in FIG. 7 around the support shaft 125 to the stopper 121. The protruding portion 121b is connected to each leg 12
1a, 121a, each leg 121a,
121a, each leg 121a, 1
Locking rod 116 at the step at the connection with
and c. The tongue piece 121c is formed integrally with the protruding portion 121b, and is provided at a position where the tongue piece 121c can come into contact with the locking rod 116c when the ink roller supporting member 116 rotates as described later. Connecting rod 1
21d has its both ends fixed to substantially the center of each of the legs 121a, 121a.
A pin 1 provided at the other end of an operation piece 127 rotatably supported at one end by a plunger 120a of a solenoid 120
27a are engaged. The operating piece 127 is a solenoid 1
The mounting member 128 is rotatably supported by a mounting member 128 mounted on the mounting member 20.

Inside each plate cylinder 79, 80, each spindle 8
Ink supply pipes 129 and 130 for supplying ink from 2, 105 to the respective ink reservoirs 96a, 118a are provided.

As shown in FIG. 11, the ink supply pipe 129 has four discharge ports 12 branched from the supply port 129a.
9b, and is attached to the support shaft 82 by a fixing member (not shown). Supply port 129a and support shaft 82
And both ends of a flexible connection pipe 131 communicate with each other. Ink supplied from an ink pack (not shown) by an ink pump (not shown) passes through the support shaft 82, the connection pipe 131, and the ink supply pipe 129. And supplied to the ink reservoir 96a.

As shown in FIG. 12, the ink supply pipe 130 has four discharge ports 13 branched from a supply port 130a.
0b, and is attached to the base 115 by a fixing member (not shown). In the supply port 130a,
The other end of the flexible connection pipe 132 having one end connected to the support shaft 105 is connected to the other end, and ink supplied from an ink pack (not shown) by an ink pump (not shown) is supplied to the support shaft 105, the connection pipe 132, The ink is supplied to the ink reservoir 118a via the ink supply pipe 130.

As shown in FIG. 5, the plate cylinders 79 and 80 are
Positioning member 13 fixed to side plate 133 of housing 23
4, 134, one end of each of the support shafts 82, 105 is positioned and fixed, respectively, and the other end of each of the support shafts 82, 105 is fixed to the housing 23 via a side plate 135 detachable from the housing 23.
By being fixed to 36 and 136, it is positioned and fixed to the housing 23. In addition, the flanges 8, 109 on one end side of the support shafts 82, 105 are provided outside the flanges 8, 109.
Toothed pulleys 137, 144 rotatably supported on the respective support shafts 82, 105 integrally with the bearings 138,
A spacer 1 is provided on the other end of the support shaft 82 outside the flange 85 and is rotatably supported by the support shaft 82 to secure a gap with the side plate 135.
39 is provided integrally with the flange 85 via the bearing 140.

Further, inside the plate cylinder 79, transmission for transmitting the rotational force transmitted to the toothed pulley 137 from the flange 85 at one end to the flange 85 at the other end via the gears 87 and 142. A member 141 is provided. The transmission member 141 includes a support shaft 141a rotatably supported by the bases 92, 92 and gears 141b, 141c fixed to both ends of the support shaft 141a.
Are arranged so as to mesh with the gear 87 and the gear 141c with the gear 142, respectively. The rotational force transmitted to the toothed pulley 144 is provided inside the plate cylinder 80 by the gear 1.
11, the flange 11 through the flange 109.
A transmission member 145 for transmitting to zero is provided.
The transmission member 145 includes a support shaft 145a rotatably supported by the side wall portions 115a, 115a, and gears 145b, 145c fixed to both ends of the support shaft 145a. 143
And are arranged to mesh with each other.

At the lower right of the plate cylinder 80, a plate cylinder driving means 81 is provided. As shown in FIG. 13, the plate cylinder driving means 81 mainly includes two motors 146 and 147 which are rotatable in the opposite directions and are rotatable in the opposite directions, and each output shaft of each of the motors 146 and 147. 146a, 147a
Are attached with toothed pulleys 148 and 149, respectively. Timing belts 150 and 151 are stretched between the toothed pulley 148 and the toothed pulley 137 and between the toothed pulley 149 and the toothed pulley 144, so that each of the plate cylinders 79 and 80 is Motor 14
6,147 are transmitted and rotated in opposite directions in synchronization with each other.

An operation panel 15 is provided on the upper front surface of the housing 23.
3 are provided. As shown in FIG. 14, the operation panel 153 includes a prepress start key 154, a print start key 155, a test print key 156, a stop key 157, a ten key 158, a clear key 159, and an enlargement / reduction key 16.
0, a printing speed setting key 161, a continuous shooting key 162, a display device 163 including a 7-segment LED, a display device 164 including an LCD, and the like. A timer 165 as a time measuring means for measuring an elapsed time which is a time until the button 154 is pressed is provided therein.

The control unit 10 is provided below the inside of the housing 23. The control unit 10 mainly includes a control unit 166 which is a known microcomputer having a CPU, a ROM, a RAM, and the like, and controls the operation of the stencil printing apparatus 1.

FIG. 15 is a control block diagram of the control means 166 used in the first embodiment. Control means 1
A stencil printer 66 receives an image data signal from the image reading unit 2, an operation signal from each of the sensors 152, 170, 171, a control signal from the operation panel 153, and a time signal from the timer 165, and stores the time signal from the ROM. 1, a first plate making unit 4, a second plate making unit 5, a first plate discharging unit 6, a second plate discharging unit 7, a sheet discharging unit 8, an ink pump (not shown), Plate cylinder driving means 81 having 146,147 and a first having cylinder 98
The printing unit 9 including the ink roller moving means 91 and the second ink roller driving means 108 having the solenoid 120 is controlled.

The operation of the stencil printing apparatus 1 will be described below based on the above configuration. The operator sets the two originals on an original receiving tray (not shown),
Press 54. At this time, the operation of the timer 165 that has been operating since the end of the previous printing operation is stopped, and this time signal is output to the control unit 166. The control means 166, which has received the time signal, compares the time signal with a threshold value stored in the ROM. Call. When the time signal is equal to or less than the threshold, the operation program at the time of normal printing is called.

First, the operation during normal printing will be described. When the prepress start key 154 is pressed, the motor 1
When the plate cylinder 79 rotates in the counterclockwise direction in FIG. 1 by the operation of the plate cylinder 79, the lower plate discharging member 48 is moved by the operation of the moving means (not shown), and the printing is wound around the outer peripheral surface of the plate cylinder 79. The printed master 167 is peeled and conveyed by the upper plate discharging member 47 and the lower plate discharging member 48, and the printed master 167 is compressed by the compression plate 50 after being stored in the plate discharging box 49. The motor 147 simultaneously with the rotation of the plate cylinder 79
1, the plate cylinder 80 rotates clockwise in FIG. 1, and the moving means (not shown) operates to move the lower plate discharging member 58, and the printed master wound around the outer peripheral surface of the plate cylinder 80. 168 is an upper plate discharging member 57 and a lower plate discharging member 5
8, the sheet is peeled from the outer peripheral surface of the plate cylinder 80, conveyed into the plate discharge box 59, and compressed by the compression plate 60.
Thereafter, the plate cylinders 79 and 80 rotate to the plate feeding standby position and stop, and the plate discharging operation is completed.

The image reading section 2 performs a document image reading operation. The document conveying roller pair 12 starts rotating in parallel with the plate discharging operation, and one upper sheet of the document (not shown) is conveyed on the contact glass 11. Reading of the original image
The reflection is performed by reflecting the reflected light exposed and reflected by the fluorescent lamp 20 by the reflection mirrors 18 and 19, and the read original image is condensed by the lens 21 and then incident on the image sensor 22 to be photoelectrically converted. The photoelectrically converted electric signal is input to an A / D converter (not shown) in the housing 23. The document from which the image has been read is discharged by a document transport belt 16 and a document transport roller 13 to a document tray (not shown) disposed above the document transport belt 16.

In parallel with the original reading operation, the first plate making section 4 performs a plate making operation. After the plate discharging operation is completed, the platen roller 36 and the master transport roller pairs 38 and 39 start rotating, and the master 33 is pulled out from the master roll 34. The master 33 pulled out is subjected to plate making when passing through the thermal head 35. The plurality of heating elements arranged on the surface of the thermal head 35 are selectively provided in accordance with digital image signals sent after being subjected to various processes by an A / D converter and other plate making substrates (not shown). Heat is generated, and the thermoplastic resin film of the master 33 is melt-punched.

According to the number of steps of a stepping motor (not shown) for driving the rotation of the platen roller 36, the leading end of the master 33 is moved to the stage 86 and the clamper 9.
When the control unit 166 determines that the control unit 166 has reached a predetermined position between 0 and 0, an operation signal is sent to an opening / closing unit (not shown), the clamper 90 rotates, and the stage 86 and the clamper 9 are rotated.
With 0, the tip of the master 33 is clamped.

Thereafter, the plate cylinder 79 rotates clockwise in FIG. 1 at the same peripheral speed as the transport speed of the master 33,
The operation of winding the third cylinder 79 on the plate cylinder 79 is performed. When the control unit 166 determines that plate making for one plate is completed based on the number of steps of a stepping motor (not shown), the rotation of the platen roller 36 and the master transport roller pairs 38 and 39 is stopped, and the movable blade 37a is rotated. Then, the master 33 is disconnected. The cut master 33 is a plate cylinder 79
When the plate cylinder 79 reaches the home position again, the motor 146 is stopped by a command from the control means 166, and the plate cylinder 79 is positioned.

After reading the first original, the original transport roller pair 12 continues to rotate, and the remaining original is transported on the contact glass 11 and is read in the same manner as the previous original. It is discharged to a tray. In this embodiment, the image is read from each of the two originals. However, when the image is read from both sides of one original, the original transport belt 16 and the original transport roller 1 are read after the reading of one side is completed.
When the switching plate 17 is rotated counterclockwise by a mechanism (not shown) at the same time as the rotation of the document 3, the traveling direction of the document is changed and guided again onto the contact glass 11, and the other surface is read. Have been.

In parallel with the reading operation of the second original, the second plate making section 5 performs a plate making operation in the same manner as the first plate making section 4.
After the plate discharging operation is completed, the platen roller 43 and the master transport roller pairs 45 and 46 start rotating, and the master 40 is pulled out from the master roll 41. The pulled-out master 40 is, like the master 33, a thermal head 42.
The plate is made when passing through.

When the control means 166 determines that the leading end of the master 40 has reached a predetermined position based on the number of steps of a stepping motor (not shown) for driving the rotation of the platen roller 43, an operation signal is sent to the opening / closing means (not shown). The clamper 114 rotates, and the leading end of the master 40 is held between the stage section and the clamper 114.

Thereafter, the plate cylinder 80 rotates counterclockwise in FIG. 1 at the same peripheral speed as the transfer speed of the master 40, and the operation of winding the master 40 around the plate cylinder 80 is performed. When the control unit 166 determines that the plate making for one plate has been completed based on the number of steps of a stepping motor (not shown), the platen roller 43 and the master transport roller pair 45 and 46 are used.
Is stopped, and the movable blade 44a rotates and the master 40 is cut. The cut master 40 is pulled out by the rotation of the plate cylinder 80, and when the plate cylinder 80 reaches the home position again, the motor 147 is stopped by a command from the control means 166, and the plate cylinder 80 is positioned.

At the same time when the plate feeding operation to the plate cylinders 79 and 80 is completed, the sheet feeding roller 25 and the separation rollers 26 and 27 rotate, and the motors 146 and 147 start operating again. The uppermost one of the printing papers P stacked on the printer is separated and fed toward the registration roller pair 30, and the plate cylinders 79 and 80 start rotating at a low speed. Separated and fed, the tip of which is the registration roller pair 30
The printed printing paper P is held in a registration roller pair 3
0 rotates at a predetermined timing, whereby each plate cylinder 7 is rotated.
It is fed between 9,80.

On the other hand, inside the plate cylinders 79 and 80, the ink rollers 95 and 117, which are respectively driven to rotate by drive means (not shown), rotate the respective plate cylinders 79 and 80 to rotate the cam portions 85c and 85c. , 109b and 110b at the same time.

While energizing the solenoid 98, the plate cylinder 7
9 (each flange 85, 85),
When the protrusions c and 85c come into contact with the cam followers 95b and 95b, the ink roller 95 moves upward in FIG. 7, and a gap is generated between the one end 99a of the stopper 99 and the locking rod 94c, the plunger 98a is moved. After being sucked, the stopper 99 is rotated around the support shaft 103 in the counterclockwise direction in FIG. Thereafter, when each of the cam followers 95b, 95b passes through the convex portion of each of the cam portions 85c, 85c, the first support member 93 and the second support member 94 are moved around the support shaft 101 by the urging force of the tension spring 104 as shown in FIG. Rotates counterclockwise. By this rotation, the outer peripheral surface of the ink roller 95 comes into pressure contact with the porous support plate 83, and the porous support plate 83 and the mesh screen 89 swell downward in FIG. At this time, the control unit 166 confirms that the ink roller 95 has been swung by the signal from the sensor 152.

Also, while energizing the solenoid 120, the plate cylinder 80 (the flanges 109 and 110) is rotated,
The protrusions of the cam portions 109b and 110b are the cam followers 1
17b and 117b, the ink roller 117 moves downward in FIG.
When a gap is generated between the lock bar 116c and the lock bar 116c, the plunger 120a is sucked and the stopper 121 is
Is rotated clockwise in FIG. After that, each of the cam followers 117b, 117b
When the ink roller support member 116 passes through the convex portion of the support shaft 122b, the support shaft 122
Is rotated clockwise in FIG. By this rotation, the outer peripheral surface of the ink roller 117 is
The porous support plate 106 and a mesh screen (not shown) swell upward in FIG.

The printing paper P is fed from the pair of registration rollers 30 to between the plate cylinders 79 and 80 with a slight delay from the swinging operation of the ink rollers 95 and 117. Thereby, the porous support plate 83, the porous support plate 106, the mesh screen 89, a mesh screen (not shown),
The ink roller 95 and the ink roller 117 are pressed against each other via the master 33, the master 40, and the printing paper P, and the print image is transferred to both sides of the printing paper P. At the time of this pressure contact, the ink roller 95 swings by the second support member 94 swinging about the swing shaft 102, and the pressure contact with the ink roller 117 in the axial direction is performed uniformly. FIGS. 5 and 16 show a state where the ink roller 95 and the ink roller 117 are pressed against each other.

Printing paper P on which print images are transferred on both sides
Is separated from the outer peripheral surface of the plate cylinder 79 or the plate cylinder 80 by the separation claw 67 or the separation claw 68, and the guide plates 69, 7
0, and is conveyed by the paper discharge conveyance member 71 and discharged onto the paper discharge tray 72.

After printing, the plate cylinders 79 and 80 continue to rotate. After the ink rollers 95 and 117 oscillate, the power to the solenoids 98 and 120 is cut off by a command from the control means 166, and the stoppers 99 and 121 are actuated as shown in FIG. It moves to the position which comes into contact with each of the locking rods 94c and 116c, as indicated by the dotted line.

When the cam followers 95b, 95b again come into contact with the convex portions of the cam portions 85c, 85c by the rotation of the plate cylinder 79, the first support member 93 and the second support member 94 are provided.
Rotates around the support shaft 101 in the clockwise direction in FIG. By this rotation, the locking rod 94c and the stopper 99
When the contact with the one end 99a is released, the stopper 99
Rotate by the urging force of the urging means (not shown) and return to the position shown in FIG.

Similarly, the rotation of the plate cylinder 80 causes each of the cam followers 117b, 117b to move to the respective cam portions 109b, 110b.
When it comes into contact with the convex portion of the ink roller support member 11 again,
6 rotates counterclockwise in FIG. 16 around the support shaft 122, and the locking rod 116c and the tongue piece 121 of the stopper 121 are rotated.
c, the stopper 121 is released.
Is rotated by the urging force of the tension springs 126 and 126 and returns to the position shown in FIG.

Thereafter, the plate cylinders 79 and 80 rotate to the home position and stop, and the plate attaching operation is completed. After the stencil printing operation is completed and the stencil printing apparatus 1 is in the printing standby state, when the test printing key 156 is pressed by the operator, the uppermost one on the paper feed tray 24 as in the stencil printing operation.
The printing paper P is fed by the feed roller 25 and the separation rollers 26 and 27.
The tip is drawn into the registration roller pair 30, and the command is sent from the control means 166 to start the motors 146 and 147, and the plate cylinders 79 and 80 are driven to rotate at high speed. . The registration roller pair 30 feeds the printing paper P between the plate cylinders 79 and 80 rotating at a high speed at the same timing as the plate attaching operation. The fed printing paper P has a print image transferred to both sides thereof,
After being separated from the outer peripheral surface of the plate cylinder 79 or the plate cylinder 80 by the separation claw 67 or the separation claw 68, the sheet is conveyed by the sheet discharge conveyance member 71 and discharged onto the sheet discharge tray 72. Each plate cylinder 79, 80 returns to the home position again, and the test printing operation is completed.

The density and position of the printed image are confirmed by this test printing, and these are adjusted with various keys on the operation panel 153, and the test printing is performed again. Then, the number of prints is displayed on the display device 163 by the ten keys 158. And print speed setting key 1
When the printing speed is set at 61 and the print start key 155 is pressed, the printing paper P is continuously fed from the paper feeding unit 3 and the plate cylinders 79 and 80 are kept energized to the solenoids 98 and 120. Are rotationally driven at high speed, respectively, to perform a printing operation. When the printing of the set number of prints is completed, the timer 165 starts operating again.

In the above-described printing operation, when the amount of ink in the ink pool 96a and the ink pool 118a decreases, a signal is output from the sensor 170 or the sensor 171 to the control means 166. Control means 1 receiving the signal
66 activates an ink pump (not shown), whereby ink from an ink pack (not shown) is supplied to the spindle 82,
105, the connection pipes 131 and 132, and the ink supply pipes 129 and 130 are supplied to the ink pool 96a or the ink pool 118a.

Next, the operation at the time of printing after standing will be described. When the plate making start key 154 is pressed, each plate cylinder 7 is pressed.
9 and 80 start rotating at a low speed, and the solenoids 98 and 120 are energized, and the plate cylinders 79 and 8 are turned on.
Inside 0, each of the ink rollers 95 and 117 rotated and driven by a driving unit (not shown) swings in the same manner as in the normal printing.

When the outer peripheral surface of each of the ink rollers 95 and 117 is pressed against each of the porous support plates 83 and 106, each of the porous support plates 83 and 106 swells outward, respectively. Support plate 106, mesh screen 8
9, mesh screen not shown, printed master 1
67, ink roller 9 via printed master 168
5 and the ink roller 117 are pressed against each other, and the plate cylinders 79 and 80 rotate in this state.

By this pressure contact, the ink, which has adhered to the porous support plate 83, the porous support plate 106, the mesh screen 89, and the mesh screen (not shown) and whose viscosity has been reduced by standing, is absorbed by the printed masters 167 and 168. The ink is removed from the plate cylinders 79 and 80, and the porous support plate 83, the porous support plate 106, the mesh screen 89, and the mesh screen (not shown) are filled with new ink.

After the plate cylinders 79 and 80 have rotated the number of times previously stored in the control means 166, they stop at the home position. When the power to the solenoids 98 and 120 is cut off before the plate cylinders 79 and 80 stop, the stoppers 99 and 121 return to the positions shown in FIG. 7, respectively, and the ink rollers 95 and 117 Will be retained.

After the above-described pressing operation is completed, the plate discharging operation, the plate making operation, the plate feeding operation, and the printing operation are sequentially performed in the same manner as in the normal printing, and after the printing operation is completed, the timer 165 starts operating again. FIG. 17 shows a series of operations in the first embodiment.

Next, a second embodiment of the present invention will be described.
The second embodiment differs from the first embodiment only in that a control unit 169 is used instead of the control unit 166. A control unit 169 which is a known microcomputer having a CPU, a ROM, a RAM, and the like.
Are provided in the control unit 10 of the stencil printing apparatus 1 in place of the control means 166, and the image reading unit 2, the sensors 15
2, 170, 171 and signals from the operation panel 153, and based on the operation program of the stencil printing apparatus 1 different from the control means 166 stored in the ROM,
The control unit controls the sheet feeding unit 3, the first plate making unit 4, the second plate making unit 5, the first plate discharging unit 6, the second plate discharging unit 7, the sheet discharging unit 8, and the printing unit 9.

The operation of the stencil printing machine 1 according to the second embodiment will be described below. When the operator presses the plate making start key 154 after two originals are set on an original receiving table (not shown), the operation of the timer 165 is stopped, and a time signal is output to the control means 169. The control unit 169 compares the input time signal with a threshold value stored in the ROM, and calls an operation program for normal printing or an operation program for after-standby printing from the ROM, similarly to the control unit 166. Here, since the operation at the time of normal printing is the same as that of the first embodiment, only the operation at the time of printing after leaving will be described.

When the plate making start key 154 is pressed, the motors 146 and 147 are operated to rotate the plate cylinders 79 and 80 in opposite directions, and the moving means (not shown) is operated to move the lower plate discharging members. 48, 58 are moved, and each printed master 1 is wound around the outer peripheral surface of each plate cylinder 79, 80.
67 and 168 are peeled off. Thereafter, each plate cylinder 79, 80
Rotates to the home position and stops, and the plate discharging operation is completed.

After the plate discharging operation is completed, each plate cylinder 79, 80 starts rotating at a low speed, and each solenoid 98, 1
Electric current is supplied to the roller 20, and the ink rollers 95 and 117, which are rotationally driven by driving means (not shown), swing inside the plate cylinders 79 and 80, respectively.

When the outer peripheral surface of each of the ink rollers 95 and 117 is pressed against each of the porous support plates 83 and 106, each of the porous support plates 83 and 106 swells outward, respectively. Support plate 106, mesh screen 8
9. The ink roller 95 and the ink roller 117 are pressed against each other via a mesh screen (not shown), and the plate cylinders 79 and 80 rotate in this state.

By this pressing, the mesh screen 89 is formed.
And the ink density remaining on the perforated portions of the printed masters 167 and 168 remaining on the surface of the mesh screen (not shown) are leveled, and the ink density on the plate cylinders 79 and 80 becomes substantially uniform.

After the plate cylinders 79 and 80 have rotated the number of times previously stored in the control means 169, they stop at the home position. When the power to the solenoids 98 and 120 is cut off before the plate cylinders 79 and 80 stop, the stoppers 99 and 121 return to the positions shown in FIG. 7, respectively, and the ink rollers 95 and 117 Will be retained.

After the pressing operation is completed, the plate making operation, the plate feeding operation, and the printing operation are sequentially performed in the same manner as in the normal printing.
After the end of the printing operation, the timer 165 starts operating again. FIG. 18 shows a series of operations in the second embodiment.

Next, a third embodiment of the present invention will be described.
The third embodiment differs from the first embodiment only in that a control unit 172 is used instead of the control unit 166. A control unit 172 which is a known microcomputer having a CPU, a ROM, a RAM, and the like.
Are provided in the control unit 10 of the stencil printing apparatus 1 in place of the control means 166, and the image reading unit 2, the sensors 15
2, 170, 171 and the operation panel 153, and receives control signals 166, 1 stored in the ROM.
69, based on an operation program of the stencil printing apparatus 1 different from that of the stencil printing machine 1,
It controls the plate discharging unit 6, the second plate discharging unit 7, the sheet discharging unit 8, and the printing unit 9.

The operation of the stencil printing machine 1 according to the third embodiment will be described below. When the operator presses the plate-making start key 154 after two originals are set on an original receiving table (not shown), the operation of the timer 165 stops, and a time signal is output to the control means 172. The control unit 172 compares the input time signal with a threshold value stored in the ROM, and calls an operation program for normal printing or an operation program for after-standby printing from the ROM, similarly to the control units 166 and 169. Here, since the operation at the time of normal printing is the same as that of the first embodiment, only the operation at the time of printing after leaving will be described.

When the plate-making start key 154 is pressed, the plate cylinders 79 and 80 start rotating at a low speed, and the solenoids 98 and 120 are energized.
Inside the printers 9 and 80, the respective ink rollers 95 and 117 rotated by driving means (not shown) respectively oscillate in the same manner as in normal printing.

When the outer peripheral surface of each of the ink rollers 95 and 117 is pressed against each of the porous support plates 83 and 106, each of the porous support plates 83 and 106 swells outward, respectively. Support plate 106, mesh screen 8
9, mesh screen not shown, printed master 1
67, ink roller 9 via printed master 168
5 and the ink roller 117 are pressed against each other, and the plate cylinders 79 and 80 rotate in this state.

By this pressure contact, the ink, which has adhered to the porous support plate 83, the porous support plate 106, the mesh screen 89, and the mesh screen (not shown) and whose viscosity has been reduced by standing, is absorbed by the printed masters 167 and 168. The ink is removed from the plate cylinders 79 and 80, and the porous support plate 83, the porous support plate 106, the mesh screen 89, and the mesh screen (not shown) are filled with new ink. .

After the plate cylinders 79 and 80 have rotated the number of times previously stored in the control means 172, they stop at the home position. When the power to the solenoids 98 and 120 is cut off before the plate cylinders 79 and 80 stop, the stoppers 99 and 121 return to the positions shown in FIG. 7, respectively, and the ink rollers 95 and 117 Will be retained.

When the pressing operation is completed, each motor 14
6, 147 are operated to rotate the plate cylinders 79, 80 in opposite directions, and the moving means (not shown) is operated to move the lower plate discharging members 48, 58, so that the plate cylinders 79, 80 are moved.
Printed masters 167 and 168 wound on the outer peripheral surface of
Is peeled off. Thereafter, the plate cylinders 79 and 80 rotate to the home position and stop, and the plate discharging operation is completed.

After the plate discharging operation is completed, each plate cylinder 79, 80 starts rotating at a low speed, and each solenoid 98, 1
The energization of the ink roller 95 is performed again, and the ink rollers 95 and 117 rotated by driving means (not shown) in the respective plate cylinders 79 and 80 start swinging again.

When the outer peripheral surface of each of the ink rollers 95 and 117 is pressed against each of the porous support plates 83 and 106, each of the porous support plates 83 and 106 swells outward, respectively. Support plate 106, mesh screen 8
9. The ink roller 95 and the ink roller 117 are pressed against each other via a mesh screen (not shown), and the plate cylinders 79 and 80 rotate in this state.

By this pressing, the mesh screen 89 is formed.
And the ink density remaining on the perforated portions of the printed masters 167 and 168 remaining on the surface of the mesh screen (not shown) are leveled, and the ink density on the plate cylinders 79 and 80 becomes substantially uniform.

After the plate cylinders 79 and 80 have rotated the number of times previously stored in the control means 172, they stop at the home position. When the power to the solenoids 98 and 120 is cut off before the plate cylinders 79 and 80 stop, the stoppers 99 and 121 return to the positions shown in FIG. 7, respectively, and the ink rollers 95 and 117 Will be held again.

After the second pressing operation is completed, a plate making operation, a plate feeding operation, and a printing operation are sequentially performed in the same manner as in normal printing, and after the printing operation is completed, the timer 165 starts operating again. FIG. 19 shows a series of operations in the third embodiment.

Next, a fourth embodiment of the present invention will be described.
The fourth embodiment differs from the first embodiment only in that a control unit 173 is used instead of the control unit 166. A control unit 173 which is a known microcomputer having a CPU, a ROM, a RAM, and the like.
Are provided in the control unit 10 of the stencil printing apparatus 1 in place of the control means 166, and the image reading unit 2, the sensors 15
2, 170, 171 and the operation panel 153, and receives control signals 166, 1 stored in the ROM.
The paper feed unit 3, the first plate making unit 4, the second plate making unit 5, the first plate discharging unit 6, the second plate discharging unit 7, the sheet discharging unit based on an operation program of the stencil printing apparatus 1 different from 69 and 172. 8, printing unit 9
Control.

Hereinafter, the operation of the stencil printing apparatus 1 according to the fourth embodiment will be described. When the operator presses the plate-making start key 154 after two documents are set on a document receiving table (not shown), the operation of the timer 165 stops, and a time signal is output to the control means 173. The control unit 173 compares the input time signal with a threshold value stored in the ROM, and calls an operation program during normal printing or an operation program during post-leaving printing from the ROM, similarly to the control units 166, 169, and 172. Here, since the operation at the time of normal printing is the same as that of the first embodiment, only the operation at the time of printing after leaving will be described.

When the plate-making start key 154 is pressed, the motors 146 and 147 are operated to rotate the plate cylinders 79 and 80 in opposite directions, and the moving means (not shown) is operated to move the lower plate discharging members. 48, 58 are moved, and each printed master 1 is wound around the outer peripheral surface of each plate cylinder 79, 80.
67 and 168 are peeled off. Thereafter, each plate cylinder 79, 80
Rotates to the home position and stops, and the plate discharging operation is completed.

After the plate discharging operation is completed, the platen roller 36 and the master transport roller pairs 38 and 39 start rotating, and the master 33 is pulled out from the master roll 34.
The pulled-out master 33 passes through the thermal head 35, but at this time, the heating elements of the thermal head 35 do not generate heat, and the plate making operation is not performed.

The control means 1 determines that the leading end of the unprinted master 33 has reached a predetermined position between the stage 86 and the clamper 90 due to the number of steps of a stepping motor (not shown) for driving the platen roller 36 to rotate.
When the judgment is made at 73, an operation signal is sent to the opening / closing means (not shown), and the clamper 90 rotates, so that the front end of the master 33 is held between the stage 86 and the clamper 90.

Thereafter, the plate cylinder 79 rotates clockwise in FIG. 1 at the same peripheral speed as the transport speed of the master 33, and
The operation of winding the third cylinder 79 on the plate cylinder 79 is performed. When the control unit 173 determines that the conveyance of one plate has been completed based on the number of steps of a stepping motor (not shown), the rotation of the platen roller 36 and the master conveyance roller pairs 38 and 39 is stopped, and the movable blade 37a is rotated. Then, the master 33 is disconnected. The cut master 33 is a plate cylinder 79
When the plate cylinder 79 reaches the home position again, the motor 146 is stopped by a command from the control means 173 to position the plate cylinder 79, and the unprinted master 33 is fed to the plate cylinder 79. The operation is completed.

After the plate discharging operation is completed, the platen roller 43 and the master transport roller pairs 45 and 46 also start rotating, and the master 40 is pulled out from the master roll 41.
Like the master 33, the pulled-out master 40 passes through the thermal head 42 without making a plate.

When the control means 173 determines that the leading end of the unmade master 40 has reached a predetermined position based on the number of steps of a stepping motor (not shown) for rotating and driving the platen roller 43, an operation signal is sent to the opening / closing means (not shown). Then, the clamper 114 rotates and the leading end of the master 40 is held between the stage unit and the clamper 114.

After that, the plate cylinder 80 rotates counterclockwise in FIG. 1 at the same peripheral speed as the transport speed of the master 40, and the operation of winding the master 40 around the plate cylinder 80 is performed. When the control unit 173 determines that the transport of one plate has been completed based on the number of steps of a stepping motor (not shown), the platen roller 43 and the master transport roller pair 45 and 46 are determined.
Is stopped, and the movable blade 44a rotates and the master 40 is cut. The cut master 40 is pulled out by the rotation of the plate cylinder 80, and when the plate cylinder 80 reaches the home position again, the motor 147 is stopped by a command from the control means 173, the plate cylinder 80 is positioned, and the plate cylinder 80 is positioned. The plate feeding operation of the unprinted master 40 is completed.

When the plate cylinder 80 is positioned, each plate cylinder 7
9 and 80 start rotating at a low speed, and the solenoids 98 and 120 are energized, and the plate cylinders 79 and 8 are turned on.
Inside 0, each of the ink rollers 95 and 117 rotated and driven by a driving unit (not shown) swings in the same manner as in the normal printing.

When the outer peripheral surface of each of the ink rollers 95 and 117 is pressed against each of the porous support plates 83 and 106, each of the porous support plates 83 and 106 swells outward, respectively, and the porous support plate 83 and the porous support plates 83 and 106 are expanded. Support plate 106, mesh screen 8
9. Mesh screen (not shown), unprinted master 3
3. The ink roller 95 and the ink roller 117 are pressed into contact with each other via the unprinted master 40.
9,80 rotates.

By this pressure contact, the ink which has adhered to the porous support plate 83, the porous support plate 106, the mesh screen 89, and the mesh screen (not shown) and whose viscosity has been reduced by standing is absorbed by the unmade masters 33 and 40.
While being removed from the plate cylinders 79 and 80, the porous support plate 83, the porous support plate 106, the mesh screen 89,
A mesh screen (not shown) is filled with new ink.

Further, due to this pressing, unevenness of the ink density corresponding to the perforated portions of the printed masters 167 and 168, which remain on the surface of the mesh screen 89 and the surface of the mesh screen (not shown), are eliminated. Each plate cylinder 7 is relaxed by being absorbed by 33, 40.
The ink density on 9,80 is made uniform.

After the plate cylinders 79 and 80 have rotated the number of times stored in the control means 173 in advance, they stop at the home position. When the power to the solenoids 98 and 120 is cut off before the plate cylinders 79 and 80 stop, the stoppers 99 and 121 return to the positions shown in FIG. 7, respectively, and the ink rollers 95 and 117 Will be retained.

When the pressing operation is completed, each motor 14
6, 147 are operated to rotate the plate cylinders 79, 80 in opposite directions, and the moving means (not shown) is operated to move the lower plate discharging members 48, 58, so that the plate cylinders 79, 80 are moved.
The unprinted masters 33 and 40 are peeled off from the outer peripheral surface of.
Thereafter, the plate cylinders 79 and 80 rotate to the home position and stop, and the second plate discharging operation is completed.

After the second plate discharging operation is completed, the plate making operation, the plate feeding operation, and the printing operation are sequentially performed in the same manner as in the normal printing, and after the printing operation is completed, the timer 165 starts operating again. FIG. 20 shows a series of operations in the fourth embodiment.

In the stencil printing machine 1 used in the first to fourth embodiments, the ink supply means 84 and the ink supply means 10 are used.
7 is movable, but one of the ink supply means is fixed in a state where the outer peripheral surface of the ink roller is close to the inner peripheral surface of the porous support plate, and the other ink supply means is fixed. By moving the stencil printing apparatus, a stencil printing apparatus having a configuration in which both porous support plates can be brought into contact can be used. In this case, similarly to the ink supply means 84, the ink supply means on the moving side is configured to be swingable by a support shaft provided in a direction orthogonal to the support shaft 82 or the support shaft 105.

FIG. 21 is a schematic side view of a stencil printer 174 used in the fifth to eighth embodiments of the present invention. In the figure, the stencil printing apparatus 174 includes an image reading unit 175, a paper feeding unit 176, a plate making unit 177, a first plate discharging unit 178, a second plate discharging unit 179, a sheet discharging unit 180, and a printing unit 18.
1. It mainly comprises a control unit 182.

The image reading unit 175 disposed on the upper part of the housing 183 has a contact glass on which an original is placed, a pair of original conveying rollers for conveying the original, and a guide for the original to be conveyed. Guide plate, a document transport belt for transporting the document along the contact glass, a switching plate for switching the discharge direction of the read document, a reflecting mirror and a fluorescent lamp for scanning and reading the document image, and focusing the scanned image Lens, CCD for processing the focused image
It mainly comprises an image sensor and the like.

A paper feed unit 176 disposed at the center lower portion of the housing 183 includes a paper feed tray 184 for loading the print paper P, a paper feed roller 185 for feeding the print paper P one by one, and a separation pad 186. It mainly includes guide plates 187 and 188 for guiding the fed printing paper P, a pair of registration rollers 189 for feeding the printed paper P after holding the leading edge of the fed printing paper P, and then feeding the paper.

The plate making section 177 disposed at the center of the right side of the housing 183 has a master roll 191, a thermal head 192, a platen roller 193, cutting means 194, a master transport roller pair formed by winding a master 190 in a roll shape. 1
It mainly consists of 95 and the like.

The first plate discharging portion 178 disposed at the upper center of the housing 183 mainly includes an upper plate discharging roller 196, a lower plate discharging roller 197, a plate discharging box 198, and the like. The upper plate discharging roller 196 is driven to rotate clockwise in FIG. 21 by a driving unit (not shown), and the lower plate discharging roller 197 is driven to rotate counterclockwise in FIG. 21 by a driving unit (not shown), and is moved by a moving unit (not shown). 21 and the outer peripheral surface is selectively moved to a position where the outer peripheral surface comes into contact with the outer peripheral surface of the plate cylinder 212 described later. The plate discharge box 198 for storing the printed master 199 peeled off from the outer peripheral surface of the plate cylinder 212 is provided in the housing 18.
3 is provided detachably.

The second plate discharging section 179 disposed on the lower left side of the housing 183 has an upper plate discharging roller 200, a lower plate discharging roller 201, and a plate discharging box 20 similar to the first plate discharging section 178.
It mainly consists of 2 etc.

The upper plate discharging roller 200 and the lower plate discharging roller 201 are composed of the upper plate discharging roller 196 and the lower plate discharging roller 1.
As in the case of 97, each is rotationally driven by a driving means (not shown). The lower plate discharging roller 201 is selectively moved by a moving means (not shown) to a position shown in FIG. 21 and a position where the outer peripheral surface comes into contact with the outer peripheral surface of the plate cylinder 213 described later. The plate discharging box 202 for storing the printed master 203 peeled from the outer peripheral surface of the plate cylinder 213 is a housing 18.
3 is provided detachably.

A paper discharge unit 180 is provided between the first plate discharge unit 178 and the second plate discharge unit 179. Paper output unit 180
Is mainly composed of peeling claws 204 and 205, a paper discharge conveyance member 206, and a paper discharge tray 207.

The peeling claw 204 for peeling the printed printing paper P from the outer peripheral surface of the plate cylinder 213 is rotatably supported by a sheet discharge conveying member 206 described later, and the tip thereof is fixed to the plate cylinder 2.
13 is provided so as to be able to advance and retreat with respect to the outer peripheral surface. The peeling claw 205 is rotatably supported by a side plate (not shown) of the housing 183, and its tip is provided to be able to advance and retreat with respect to the outer peripheral surface of the plate cylinder 212. Drive roller 208, driven roller 209, endless belt 210, suction fan 211
The paper discharge conveyance member 206 composed of the suction fan 21
1, the printing paper P is sucked onto the endless belt 210 by the suction force, and the printing paper P is
Is transported in the direction of the arrow in FIG. The discharge tray 207 stacks the printing paper P conveyed by the discharge conveyance member 206 on its upper surface.

A printing unit 181 is provided at the center of the housing 183. The printing unit 181 mainly includes a plate cylinder 212 as a first plate cylinder, a plate cylinder 213 as a second plate cylinder, a plate cylinder driving unit 214, a contact / separation unit 221 and the like.

The plate cylinder 212 is provided so as to be rotatable about a support shaft 215, and has a porous support plate (not shown), a mesh screen (not shown) provided on the outer peripheral surface thereof, and an openable / closable provided on a stage (not shown). The clamper 216
An ink supply means 217 is provided inside.
The support shaft 215 is movably supported by contact / separation means 221 described later.

The ink supply means 217 includes the ink roller 2
18, doctor roller 219, ink supply pipe 22
It is mainly composed of 0 and the like. Ink roller 218
Are rotatably supported between side plates (not shown) in the plate cylinder 212, and are rotationally driven in the same direction as the plate cylinder 212 by driving means (not shown). A doctor roller 219 is provided near the ink roller 218. A doctor roller 219 whose outer peripheral surface is arranged close to the outer peripheral surface of the ink roller 218 is rotatably supported between side plates (not shown) in the plate cylinder 212, and is driven in a direction opposite to the ink roller 218 by a driving unit (not shown). It is driven to rotate. Above the ink roller 218, the ink in the ink pack provided outside the plate cylinder 212 is filled with ink.
An ink supply pipe 220 leading to the inside is provided. The ink supplied through the ink supply pipe 220 is supplied to the outer peripheral surface of the ink roller 218 and the doctor roller 219.
In the vicinity of the outer peripheral surface of the ink, a wedge-shaped ink reservoir 21 is formed.
9a is formed.

A plate cylinder 213 is provided below the plate cylinder 212. The plate cylinder 213 is rotatably provided around a support shaft 222. Like the plate cylinder 212, the plate cylinder 213 is provided on an outer peripheral surface of a porous support plate (not shown), a mesh screen (not shown), and a stage (not shown). Openable and closable clamper 223 and ink supply means 224 therein.
Is provided. The support shaft 222 is attached between side plates (not shown) of the housing 183.

The ink supply means 224 includes an ink roller 225, a doctor roller 226, and an ink supply pipe 2.
27 mainly. Ink roller 225
Are rotatably supported between side plates (not shown) in the plate cylinder 213, and are rotationally driven in the same direction as the plate cylinder 213 by driving means (not shown). The doctor roller 226 disposed between the side plates (not shown) in the plate cylinder 213 near the ink roller 225
25, and is driven to rotate in the opposite direction to the ink roller 226 by a driving unit (not shown). Above the doctor roller 226, an ink supply pipe 227 that guides ink in an ink pack provided outside the plate cylinder 213 into the plate cylinder 213 is provided. The ink supplied through the ink supply pipe 227 forms a wedge-shaped ink reservoir 226a near the outer peripheral surface of the ink roller 225 and the outer peripheral surface of the doctor roller 226.

At the right side of the plate cylinder 213, the plate cylinder driving means 214
Are arranged. The plate cylinder driving means 214 is mainly composed of two motors (not shown) which are rotatable in the normal and reverse directions and are rotationally driven in mutually opposite directions, similarly to the plate cylinder driving means 81. The output of each motor is Pulley attached to the output shaft of the printer, toothed pulleys attached to flanges (not shown) provided at the side ends of the plate cylinders 212 and 213, and a timing belt stretched between the toothed pulleys. The print cylinders 212 and 213 are transmitted to the plate cylinders 212 and 213, and thereby, the plate cylinders 212 and 213 are rotationally driven in the opposite directions in synchronization with each other.

A contact / separation means 221 is provided near the plate cylinder 212. As shown in FIG. 22, the contact / separation means 221 mainly includes swing arms 228, 228, a cam 229, and a holding means 230.

The swing arms 228, 228 having a long arm 228a and a short arm 228b and formed in a bent shape at the bent portion 228c are formed by flanges (not shown) provided at both ends of the plate cylinder 212. Each is arranged outside. Each swing arm 228, 228
c and 228 c are integrally connected by a swing shaft 231, and the swing shaft 231 is rotatably supported by a side plate (not shown) of the housing 183. Each long arm 228a, 2
A support shaft 215 is fixed to substantially the center of 28a, and a rotatable cam follower 2 is attached to one end of one short arm 228b.
32 are attached.

At the end of each of the long arms 228a, 228a, there is provided a tension spring 233 for biasing each of the swing arms 228, 228 counterclockwise in FIG. , 233 are attached respectively. The other end of each tension spring 233, 233 is
83 are fixed to side plates (not shown).

The support shaft 22 is located below the cam follower 232.
A cam 229 rotatably supported by 9a is provided. A cam 229 having a convex portion on its outer peripheral portion that comes into contact with the cam follower 232 receives rotational force from the plate cylinder driving means 214 and is driven to rotate in synchronization with the plate cylinder 212. The position of the convex portion of the cam 229 is determined so that obstacles such as the clampers 216 and 223 provided on the peripheral surfaces of the plate cylinders 212 and 213 do not interfere with each other.
When the plate cylinder 212 is positioned at the home position, it comes into contact with the cam follower 232.

Further, the cam 229 has a plate cylinder 212 and a plate cylinder 213 when its convex portion comes into contact with the cam follower 232.
Is formed at a height at which a gap of about 3 to 5 mm is generated between the swing arm 22 and the outer shape other than the convex portion by the urging force of the tension spring 233 when the contact of the cam follower 232 is released.
8 rotates counterclockwise in FIG.
2 and the outer circumferential surface of the plate cylinder 213 are pressed against each other,
It is formed in a shape separated from the cam follower 232.

At the upper left of the swing arm 228, the holding means 2
30 are provided. The holding means 230 mainly includes a holding arm 234 and a solenoid 235.
The holding arm 234 has a support shaft 234a at its center.
And has a hook-shaped engaging claw 234b at one end. The locking claw 234b can engage with a notch 228d formed at the tip of one long arm 228a. The other end of the holding arm 234 is connected to the plunger 235a of the solenoid 235. One end of a tension spring (not shown) is attached to the holding arm 234, and a rotational urging force in the counterclockwise direction in FIG. 22 is applied to the holding arm 234 about the support shaft 234a.

An operation panel 153 having a timer 165 inside, similar to the stencil printing apparatus 1, is provided on the upper front surface of the housing 183.

A control section 182 is provided at the lower right side of the housing 183. The control unit 182 includes a CPU, a ROM,
The stencil printing apparatus 1 mainly includes a control unit 236 which is a well-known microcomputer having an AM or the like.
74 is controlled.

FIG. 23 is a control block diagram of the control means 236 used in the fifth embodiment. Control means 2
36, an image data signal from the image reading unit 175, a control signal from the operation panel 153, and a time signal from the timer 165;
Based on the operation program of No. 4, the sheet feeding unit 176, the plate making unit 177, the first plate discharging unit 178, the second plate discharging unit 179, the sheet discharging unit 180, and the printing unit 181 having the plate cylinder driving unit 214 and the solenoid 235. Perform control.

The operation of the stencil printing apparatus 174 will be described below based on the above configuration. The operator sets two originals on an original receiving table (not shown), and presses a plate-making start key 154. At this time, the operation of the timer 165 that has been operating since the end of the previous printing operation is stopped, and this time signal is output to the control unit 236. The control means 236, having received the time signal, compares the time signal with a threshold value stored in the ROM. If the time signal exceeds the threshold value, the control means 236 regards the printing as being after leaving the apparatus. Call. When the time signal is equal to or less than the threshold, the operation program at the time of normal printing is called.

First, the operation during normal printing will be described. When the plate making start key 154 is pressed, the plate cylinder driving means 214 operates to rotate the plate cylinder 212 in the counterclockwise direction in FIG. 21, and the moving means (not shown) operates to move the lower plate discharging roller 197. The printed master 199 wound around the outer peripheral surface of the plate cylinder 212 is peeled and conveyed by the upper plate discharging roller 196 and the lower plate discharging roller 197, and the printed master 199 is stored in the plate discharging box 198. At the same time as the rotation of the plate cylinder 212, the plate cylinder 213 rotates clockwise in FIG. 21, and the moving means (not shown) operates to move the lower plate discharge roller 201,
Printed master 2 wound around the outer peripheral surface of the plate cylinder 213
03 is an upper plate discharging roller 200 and a lower plate discharging roller 20
The sheet is separated from the outer peripheral surface of the plate cylinder 213 by 1 and transported into the plate discharge box 202. Thereafter, each plate cylinder 212, 2
13 rotates to the plate feeding standby position and stops, and the plate discharging operation is completed.

The image reading section 175 performs an operation of reading a document image. The read document image is photoelectrically converted and then input to an A / D converter (not shown) in the housing 183. The document from which the image has been read is discharged to a document tray (not shown).

In parallel with the original reading operation, the plate making section 177 performs a plate making operation. After the plate discharging operation is completed, the platen roller 193 and the master transport roller pair 195 each start rotating, and the master 190 is pulled out from the master roll 191. When the master 190 pulled out passes through the thermal head 192, it is perforated in accordance with a digital image signal sent after being subjected to various processes by an A / D converter and other plate making boards (not shown). .

When the control means 236 determines that the leading end of the master 190 has reached a predetermined position between the stage (not shown) and the clamper 216 based on the number of steps of a stepping motor (not shown) that rotationally drives the platen roller 193, An operation signal is sent to opening / closing means (not shown), the clamper 216 rotates, and the leading end of the master 190 is held.

Thereafter, the plate cylinder 212 rotates clockwise in FIG. 21 at the same peripheral speed as the transport speed of the master 190, and the operation of winding the master 190 around the plate cylinder 212 is performed. When the control unit 236 determines that plate making for one plate is completed based on the number of steps of a stepping motor (not shown), the rotation of the platen roller 193 and the master transport roller pair 195 is stopped, and the cutting unit 194 is operated to operate the master. 190 is cut. Disconnected master 19
0 is pulled out by the rotation of the plate cylinder 212,
When 12 reaches the home position again, the control means 23
6, the cylinder driving means 214 stops.
The plate cylinder 212 is positioned.

After reading the first document, the remaining one document is read in the same manner as the previous document, and then discharged to a document tray (not shown). In this embodiment, images are read from two originals, but a configuration in which images are read from both sides of one original can be adopted as in the stencil printing apparatus 1.

In parallel with the reading operation of the second original, the plate making section 177 performs the plate making operation in the same manner as described above. When the control unit 236 determines that the leading end of the master 190 has reached a predetermined position based on the number of steps of a stepping motor (not shown) that rotationally drives the platen roller 193, the master 190 that has been made is sent to the plate cylinder 213 (not shown). An operation signal is sent to the opening / closing means, the clamper 223 rotates, and the leading end of the master 190 is held.

Thereafter, the plate cylinder 213 rotates counterclockwise in FIG. 21 at the same peripheral speed as the transport speed of the master 190,
The operation of winding the master 190 around the plate cylinder 213 is performed. When the control unit 236 determines that plate making for one plate has been completed based on the number of steps of a stepping motor (not shown), the rotation of the platen roller 193 and the master transport roller pair 195 stops, and the cutting unit 194 operates. Master 190 is disconnected. Disconnected master 1
90 is pulled out by the rotation of the plate cylinder 213, and when the plate cylinder 213 reaches the home position again, the control means 2
In response to a command from 36, the plate cylinder driving means 214 stops, and the plate cylinder 213 is positioned.

At the same time when the plate feeding operation to each of the plate cylinders 212 and 213 is completed, the sheet feeding roller 185 rotates and the plate cylinder driving means 214 starts operating again, and the printing stacked on the sheet feeding tray 184 is started. The uppermost sheet of the sheet P is separated and fed toward the registration roller pair 189, and the plate cylinders 212 and 213 start rotating at a low speed. The printing paper P, which has been separated and fed and the leading end of which is held by a pair of registration rollers 189, is rotated by the registration roller pair 189 at a predetermined timing, so that each of the plate cylinders 212 and 21 is rotated.
It is fed between three.

On the other hand, in synchronization with the rotation of each of the plate cylinders 212 and 213, a rotational force is transmitted from the plate cylinder driving means 214 to drive the cam 229 to rotate and to energize the solenoid 235. When the solenoid 235 is energized and the plunger 235a is sucked, the holding arm 234 rotates clockwise in FIG. 22, and the engagement between the locking claw 234b and the notch 228d is released. And the cam 22
As the convex portion moves with the rotation of the cam 9, the cam 2
The contact state between the cam follower 29 and the cam follower 232 is released, and the swing arms 228, 228 rotate counterclockwise in FIG. 22 around the swing shaft 231 by the urging force of the tension spring 233, and the plate cylinder 212 is moved. Rocks.

The printing paper P is fed from the pair of registration rollers 189 toward each of the plate cylinders 212 and 213 with a slight delay from the swinging operation of the plate cylinder 212. As a result, the porous support plate (not shown) of the plate cylinder 212 and the porous support plate (not shown) of the plate cylinder 213 are pressed against each other via each mesh screen, each master 190 and the printing paper P, and printing is performed on both sides of the printing paper P. The image is transferred.

Printing paper P on which print images are transferred on both sides
Is released from the plate cylinder 21 by the peeling nail 204 or the peeling nail 205.
The sheet 3 is peeled off from the outer peripheral surface of the plate cylinder 212, conveyed by a sheet discharge conveying member 206, and discharged onto a sheet discharge tray 207.

After the printing, the plate cylinders 212 and 213 continue to rotate. Then, the plate cylinders 212 and 213 rotate to the home position, and the convex portion of the cam 229 is
2 again, the power supply to the solenoid 235 is cut off, the holding arm 234 is rotated by the urging force of a tension spring (not shown), and returns to the position shown in FIG. 22 to complete the plate attaching operation.

After the stencil printing operation is completed and the stencil printing apparatus 174 is in the printing standby state, when the test printing key 156 is pressed by the operator, the uppermost one on the paper feed tray 184 is pressed in the same manner as the stencil printing operation. The sheet of printing paper P is
5, the tip of which is held by the pair of registration rollers 189, a command is sent from the control means 236, and the plate cylinder driving means 214 starts operating, and the plate cylinders 212 and 213 are driven to rotate at high speed. You. The registration roller pair 189 feeds the printing paper P between the plate cylinders 212 and 213 rotating at a high speed at the same timing as the plate attaching operation. The fed printing paper P is transferred with a print image on both sides thereof, is separated from the outer peripheral surface of the plate cylinder 213 or the plate cylinder 212 by the separation claw 204 or 205, and is conveyed by the sheet discharge conveyance member 206. Output tray 207
Is discharged on top. Each plate cylinder 212, 213 returns to the home position again, and the test printing operation is completed.

The density and position of the printed image are confirmed by this trial printing, and these are adjusted with various keys on the operation panel 153, and the trial printing is performed again. Then, the number of prints is displayed on the display device 163 with the ten keys 158. And print speed setting key 1
When the printing speed is set at 61 and the printing start key 155 is pressed, the printing paper P is continuously fed from the paper feeding unit 176, and the plate cylinders 212 and 213 are driven at high speed while the solenoid 235 is energized. , And the printing operation is performed by repeating the contacting and separating operations.
When the printing of the set number of prints is completed, the timer 165 starts operating again.

Next, the operation at the time of printing after standing will be described. When the plate making start key 154 is pressed, each plate cylinder 21 is pressed.
2, 213 and the cam 229 start rotating at a low speed, and the solenoid 235 is energized.
2 swings in the same manner as during normal printing.

Then, when the plate cylinder 212 is pressed against the plate cylinder 213, the ink which has adhered to each porous support plate and each mesh screen and whose viscosity has been reduced by standing is absorbed by each printed master 199, 203, and Torso 212, 213
While being removed, each porous support plate and each mesh screen are filled with fresh ink.

Each of the plate cylinders 212 and 213 is provided with control means 236.
After stopping by the number of times stored in advance in the home position, the motor stops at the home position. When the power to the solenoid 235 is cut off before the plate cylinders 212 and 213 stop, the holding arm 234 returns to the position shown in FIG.
Is held.

After the pressing operation is completed, the plate discharging operation, the plate making operation, the plate feeding operation, and the printing operation are sequentially performed in the same manner as in the normal printing, and the timer 165 starts operating again after the printing operation is completed. A series of operations in the fifth embodiment is as follows.
This is the same as a series of operations in the first embodiment.

Next, a sixth embodiment of the present invention will be described.
The sixth embodiment is different from the fifth embodiment only in that a control means 237 is used instead of the control means 236. A control unit 237 which is a known microcomputer having a CPU, a ROM, a RAM, and the like.
The control unit 182 of the stencil printing apparatus 174
The stencil printing apparatus 17 receives signals from the image reading unit 175 and the operation panel 153, and is stored in the ROM and is different from the control unit 236.
Based on the operation program of No. 4, the control of the sheet feeding unit 176, the plate making unit 177, the first plate discharging unit 178, the second plate discharging unit 179, the sheet discharging unit 180, and the printing unit 181 are performed.

Hereinafter, the operation of the stencil printing apparatus 174 in the sixth embodiment will be described. When the operator presses the plate-making start key 154 after two originals are set on an original receiving table (not shown), the operation of the timer 165 stops, and a time signal is output to the control means 237. The control unit 237 compares the input time signal with a threshold value stored in the ROM, and calls an operation program during normal printing or an operation program during post-leaving printing from the ROM, similarly to the control unit 236. Here, since the operation at the time of normal printing is the same as that of the fifth embodiment, only the operation at the time of printing after leaving will be described.

When the plate making start key 154 is depressed, the plate cylinder driving means 214 is operated to rotate the plate cylinders 212 and 213 in opposite directions, and the moving means (not shown) is operated to operate each lower plate discharging roller. 197, 201 move, and the printed masters 199, 203 are peeled off from the outer peripheral surfaces of the plate cylinders 212, 213. After that, each plate cylinder 21
2, 213 rotate to the home position and stop, and the plate discharging operation is completed.

After the plate discharging operation is completed, each of the plate cylinders 212 and 213 and the cam 229 start rotating at a low speed, and the solenoid 235 is energized, so that the plate cylinder 212 swings. When the plate cylinder 212 is pressed against the plate cylinder 213, the ink density unevenness remaining on the surface of each mesh screen (not shown) on each of the plate cylinders 212 and 213, corresponding to the perforated portions of the printed masters 199 and 203, is uniform. And each plate cylinder 21
The ink density on 2,213 becomes substantially uniform.

The plate cylinders 212 and 213 are provided with control means 237.
After stopping by the number of times stored in advance in the home position, the motor stops at the home position. When the power to the solenoid 235 is cut off before the plate cylinders 212 and 213 stop, the holding arm 234 returns to the position shown in FIG.
Is held.

After the pressing operation is completed, the plate making operation, the plate feeding operation, and the printing operation are sequentially performed in the same manner as in the normal printing.
After the end of the printing operation, the timer 165 starts operating again. A series of operations in the sixth embodiment is similar to the series of operations in the second embodiment.

Next, a seventh embodiment of the present invention will be described.
The seventh embodiment differs from the fifth embodiment only in that a control means 238 is used instead of the control means 236. Control means 238 which is a known microcomputer having a CPU, a ROM, a RAM, etc.
The control unit 182 of the stencil printing apparatus 174
36, which receives signals from the image reading unit 175 and the operation panel 153, and is stored in the ROM based on an operation program of the stencil printing apparatus 174 different from the control means 236 and 237. And the paper feed unit 17
6, plate making section 177, first plate discharging section 178, second plate discharging section 17
9, control of the paper discharge unit 180 and the print unit 181.

The operation of the stencil printing apparatus 174 according to the seventh embodiment will be described below. When the operator presses the plate-making start key 154 after two originals are set on an original receiving table (not shown), the operation of the timer 165 stops, and a time signal is output to the control means 238. The control unit 238 compares the input time signal with a threshold value stored in the ROM, and calls an operation program for normal printing or an operation program for after-leaving printing from the ROM, similarly to the control units 236 and 237. Here, since the operation at the time of normal printing is the same as that of the fifth embodiment, only the operation at the time of printing after leaving will be described.

When the plate making start key 154 is pressed, the plate cylinders 212 and 213 and the cam 229 start rotating at a low speed, and the solenoid 235 is energized, so that the plate cylinder 212 swings in the same manner as during normal printing. I do.

Then, when the plate cylinder 212 is pressed against the plate cylinder 213, the ink, which has adhered to each porous support plate and each mesh screen and whose viscosity has been reduced by standing, is absorbed by each printed master 199, 203, and Torso 212, 213
While being removed, each porous support plate and each mesh screen are filled with fresh ink.

The plate cylinders 212 and 213 are provided with control means 238.
After stopping by the number of times stored in advance in the home position, the motor stops at the home position. When the power to the solenoid 235 is cut off before the plate cylinders 212 and 213 stop, the holding arm 234 returns to the position shown in FIG.
Is held.

When the pressing operation is completed, the plate cylinder driving means 21
4, the plate cylinders 212 and 213 are driven to rotate in opposite directions, and the moving means (not shown) is operated to move the lower plate discharging rollers 197 and 201 and the plate cylinders 21 and 213 are moved.
2, 213 from the outer peripheral surface of each printed master 199, 20
3 is peeled off. Thereafter, the plate cylinders 212 and 213 rotate to the home position and stop, and the plate discharging operation is completed.

After the plate discharging operation is completed, each of the plate cylinders 212 and 213 and the cam 229 start rotating at a low speed, the energization of the solenoid 235 is performed again, and the plate cylinder 212 starts swinging again. Then, when the plate cylinder 212 is pressed against the plate cylinder 213, each printed master 1 remaining on the surface of each mesh screen (not shown) on each of the plate cylinders 212 and 213.
The ink density unevenness corresponding to the perforated portions of 99 and 203 is equalized, and the ink density on each of the plate cylinders 212 and 213 becomes substantially uniform.

The plate cylinders 212 and 213 are provided with control means 238.
After stopping by the number of times stored in advance in the home position, the motor stops at the home position. When the power to the solenoid 235 is cut off before the plate cylinders 212 and 213 stop, the holding arm 234 returns to the position shown in FIG.
Is held again.

After the second pressing operation is completed, the plate making operation, the plate feeding operation, and the printing operation are sequentially performed in the same manner as in the normal printing, and after the printing operation is completed, the timer 165 starts operating again. A series of operations in the seventh embodiment is similar to the series of operations in the third embodiment.

Next, an eighth embodiment of the present invention will be described.
The eighth embodiment is different from the fifth embodiment only in that a control means 239 is used instead of the control means 236. Control means 239 which is a known microcomputer having a CPU, a ROM, a RAM, etc.
The control unit 182 of the stencil printing apparatus 174
An operation program for the stencil printing device 174 which is provided in place of the control unit 236, receives signals from the image reading unit 175 and the operation panel 153, and is stored in the ROM and is different from the control means 236, 237 and 238. The control of the sheet feeding unit 176, the plate making unit 177, the first plate discharging unit 178, the second plate discharging unit 179, the sheet discharging unit 180, and the printing unit 181 is performed based on the.

Hereinafter, the operation of the stencil printing apparatus 174 according to the eighth embodiment will be described. When the operator presses the plate-making start key 154 after two documents are set on a document receiving table (not shown), the operation of the timer 165 stops, and a time signal is output to the control means 239. The control unit 239 compares the input time signal with a threshold value stored in the ROM, and calls an operation program during normal printing or an operation program during post-leaving printing from the ROM, similarly to the control units 236, 237, and 238. Here, since the operation at the time of normal printing is the same as that of the fifth embodiment, only the operation at the time of printing after leaving will be described.

When the plate making start key 154 is depressed, the plate cylinder driving means 214 is operated to rotate the plate cylinders 212 and 213 in opposite directions, and the moving means (not shown) is operated to move the lower plate discharging rollers. 197, 201 move, and the printed masters 199, 203 are peeled off from the outer peripheral surfaces of the plate cylinders 212, 213. After that, each plate cylinder 21
2, 213 rotate to the home position and stop, and the plate discharging operation is completed.

After the plate discharging operation is completed, the platen roller 193
And the master transport roller pair 195 start rotating, and the master 190 is pulled out from the master roll 191. The pulled out master 190 is a thermal head 192.
At this time, the heating element of the thermal head 192 does not generate heat, and the plate making operation is not performed.

Then, based on the number of steps of a stepping motor (not shown) for rotating and driving the platen roller 193, the control means 239 determines that the leading end of the unprinted master 190 has reached a predetermined position between the stage (not shown) and the clamper 216. When it is determined, an operation signal is sent to the opening / closing means (not shown), and the clamper 216 rotates, and the master 1
90 are pinched.

Thereafter, the plate cylinder 212 rotates clockwise in FIG. 21 at the same peripheral speed as the transfer speed of the master 190, and the operation of winding the master 190 around the plate cylinder 212 is performed. When the control unit 239 determines that the conveyance of one plate has been completed based on the number of steps of a stepping motor (not shown), the rotation of the platen roller 193 and the pair of master conveyance rollers 195 is stopped, and the cutting unit 194 operates to operate the master. 190 is cut. Disconnected master 19
0 is pulled out by the rotation of the plate cylinder 212,
When 12 reaches the home position again, the control means 23
The plate cylinder driving means 214 is stopped by the command from 9 to position the plate cylinder 212, and the plate feeding operation of the unprinted master 190 to the plate cylinder 212 is completed.

Next, the platen roller 193 and the master transport roller pair 195 each start rotating again, and the master 190 is pulled out from the master roll 191 again.
The pulled out master 190 passes through the thermal head 192 without making a plate, as described above.

When the control means 239 determines that the leading end of the unprinted master 190 has reached a predetermined position based on the number of steps of a stepping motor (not shown) for rotating and driving the platen roller 193, an operation signal is sent to the opening / closing means (not shown). Then, the clamper 223 rotates and the leading end of the master 190 is clamped.

Thereafter, the plate cylinder 213 rotates counterclockwise in FIG. 21 at the same peripheral speed as the transport speed of the master 190,
The operation of winding the master 190 around the plate cylinder 213 is performed. When the control unit 239 determines that the conveyance of one plate has been completed based on the number of steps of a stepping motor (not shown), the rotation of the platen roller 193 and the master conveyance roller pair 195 stops, and the cutting unit 194 operates again. The master 190 is disconnected. The cut master 190 is pulled out by the rotation of the plate cylinder 213,
When the plate cylinder 213 reaches the home position again, the plate cylinder driving unit 214 is stopped by the command from the control unit 239 to position the plate cylinder 213, and the plate feeding operation of the unprinted master 190 to the plate cylinder 213 is completed. I do.

When the plate cylinder 213 is positioned, each plate cylinder 2
12, 213 and the cam 229 start rotating at a low speed, respectively, and power is supplied to the solenoid 235, so that the plate cylinder 212 swings in the same manner as during normal printing. And plate cylinder 2
When the plate 12 is pressed against the plate cylinder 213, the ink which has adhered to each porous support plate and each mesh screen and whose viscosity has been reduced by standing is absorbed by the unprinted masters 190, 190 and removed from the plate cylinders 212, 213. At the same time, each porous support plate and each mesh screen are filled with new ink.

Further, due to this pressing, each printed master 199,
The ink density unevenness corresponding to the perforated portion 203 is alleviated by the ink being absorbed by the unprinted masters 190, 190, and the ink density on each plate cylinder 212, 213 is made uniform.

Each plate cylinder 212, 213 is provided with a control means 239.
After stopping by the number of times stored in advance in the home position, the motor stops at the home position. When the power to the solenoid 235 is cut off before the plate cylinders 212 and 213 stop, the holding arm 234 returns to the position shown in FIG.
Is held.

When the pressing operation is completed, the plate cylinder driving means 21
4, the plate cylinders 212 and 213 are driven to rotate in opposite directions, and the moving means (not shown) is operated to move the lower plate discharging rollers 197 and 201 and the plate cylinders 21 and 213 are moved.
2, masters 190, 190 which are not made from the outer peripheral surface
Is peeled off. After that, the plate cylinders 212 and 213 rotate to the home position and stop, and the second plate discharging operation is completed.

After the second plate discharging operation is completed, the plate making operation, the plate feeding operation, and the printing operation are sequentially performed in the same manner as in the normal printing, and after the printing operation is completed, the timer 165 starts operating again. A series of operations in the eighth embodiment is similar to the series of operations in the fourth embodiment.

In the stencil printing apparatus 174 used in the fifth to eighth embodiments, only the stencil making unit 177 is provided as a means for making the master 190.
Similarly to the above, a configuration having two plate making units may be adopted.

In the first to eighth embodiments, the number of rotations of each plate cylinder during pressure contact other than the printing operation is the number of times stored in advance in the ROM of each control means. Alternatively, a configuration in which the number of rotations is changed according to the length of the time signal from the timer 165 may be adopted. In this case, an appropriate value of the standing time and the number of rotations is determined by an experiment. Table 1 shows an example of the relationship between the standing time and the number of rotations.

[0216]

[Table 1]

Further, even if the standing time is almost the same, the drying method of the ink or the ink viscosity becomes different due to the difference in the environmental temperature and / or the environmental humidity. Therefore, as another modified example of each embodiment, in addition to the above-described configuration,
A configuration may be adopted in which a temperature sensor and / or a humidity sensor are provided inside each plate cylinder, and the number of rotations of the plate cylinder at the time of pressure contact, which is changed according to the length of the time signal, is corrected. Also in this case, the correction value is determined by experiment. Table 2 shows an example of a correction value according to the environmental temperature, Table 3 shows an example of a correction value according to the environmental humidity, and a control block diagram of a control unit employing this configuration is used in the first embodiment. FIG. 24 shows the control means 166 borrowed.

[0218]

[Table 2]

[0219]

[Table 3]

By adopting the above configuration, it is possible to control the number of rotations at the time of plate cylinder pressure contact to an optimum number in accordance with the state of the plate cylinder surface which changes with a change in the leaving time or environmental conditions. And a good double-sided printed image can be obtained.

[0221]

According to the first or second aspect of the present invention, when the next printing is performed from the state where the printed master is wound on the first and second master support plates,
When the elapsed time counted by the timer exceeds an arbitrary predetermined time, the first and second plate cylinders are rotated by a predetermined number of times while being pressed against each other via the printed master, whereby the first and second plate cylinders are rotated. The ink whose viscosity has been reduced by leaving it attached to the second master support plate or a mesh screen provided on the first and second master support plates is absorbed by the printed master and the first and second inks are absorbed by the printed master. Since it is removed from the plate cylinder and the first and second plate cylinders are filled with new ink, the occurrence of bleeding and set-off during double-sided printing can be prevented, and the occurrence of waste paper can be suppressed as much as possible. The printing cost can be reduced.

According to the third aspect of the present invention, when the next printing is performed from the state where the printed masters are wound on the outer peripheral surfaces of the first and second plate cylinders, the timing means measures the time. When the elapsed time exceeds an arbitrary predetermined time, the first and second plate cylinders are rotated by a predetermined number of times while being pressed against each other via the printed master, whereby the first and second plate cylinders are rotated. The ink which has adhered to the ink and whose viscosity has been reduced by standing is absorbed by the printed master and the first and second inks are absorbed.
And the first and second plate cylinders are filled with new ink, so that the occurrence of bleeding or set-off during double-sided printing can be prevented and the generation of waste paper can be minimized. Thus, the printing cost can be reduced.

According to the invention set forth in claim 4 or claim 5, when the next printing is performed from the state where the printed master is wound on the first and second master support plates, the timing means is used. When the counted elapsed time exceeds an arbitrary predetermined time, the printed master is peeled from the first and second master support plates, respectively, and then the first and second plate cylinders are pressed against each other for a predetermined time. By rotating the first and second master support plates by the number of times, the unevenness of the density of the ink corresponding to the perforated portion of the printed master remaining on the surface of the mesh screen provided on the first and second master support plates is leveled. Since the ink density on the second plate cylinder is substantially uniform, it is possible to prevent the occurrence of density unevenness immediately after the start of printing during double-sided printing, minimize the occurrence of waste paper, and reduce printing costs. be able to

According to the sixth aspect of the present invention, when the next printing is performed from the state where the printed master is wound around the outer peripheral surfaces of the first and second plate cylinders, the time measuring means measures the time. When the elapsed time exceeds an arbitrary predetermined time, the printed master is peeled from the outer peripheral surfaces of the first and second plate cylinders, respectively, and then the first and second plate cylinders are pressed against each other for a predetermined time. By rotating it a number of times, the first and second
The unevenness of the ink density corresponding to the perforated portion of the printed master remaining on the surface of the plate cylinder is evened out, and the ink density on the first and second plate cylinders becomes substantially uniform. In addition, the occurrence of density unevenness immediately after the start of printing can be prevented, the occurrence of waste paper can be suppressed as much as possible, and the printing cost can be reduced.

According to the seventh or eighth aspect of the present invention, when the next printing is performed from the state where the printed masters are wound on the first and second master support plates, the timing means is used. When the counted elapsed time exceeds an arbitrary predetermined time, the first and second plate cylinders are rotated a predetermined number of times while being pressed against each other via the printed master, and then the printed master is moved to the second position. After peeling off from the first and second master support plates, respectively, the first and second plate cylinders are again rotated a predetermined number of times while being pressed against each other, so that the first and second master support plates, the first and second master support plates, And the ink which has adhered to the mesh screen provided on the second master support plate and whose viscosity has been reduced by standing is absorbed by the printed master and removed from the first and second plate cylinders. And the first The new ink is filled in the master screen of the master support plate and the mesh screens provided on the first and second master support plates, and the mesh screen provided on the first and second master support plates is further filled with new ink. The remaining ink density unevenness corresponding to the perforated portion of the printed master is leveled and the ink density on the first and second plate cylinders becomes substantially uniform, so that bleeding, set-off, and The occurrence of density unevenness immediately after the start of printing can be prevented, the occurrence of waste paper can be further suppressed, and the printing cost can be more effectively reduced.

According to the ninth aspect of the present invention, when the next printing is performed from the state where the printed master is wound around the outer peripheral surfaces of the first and second plate cylinders, the time measuring means measures the time. When the elapsed time exceeds an arbitrary predetermined time, the first and second plate cylinders are rotated by a predetermined number of times while being pressed against each other via the printed master, and thereafter, the printed master is first and secondly rotated. After peeling off from the outer peripheral surface of the second plate cylinder, respectively, the first and second plate cylinders are again rotated by a predetermined number of times while being pressed against each other, whereby the first and second plate cylinders are rotated.
The ink which has adhered to the plate cylinder and whose viscosity has been reduced by standing is absorbed by the printed master and removed from the first and second plate cylinders, and the first and second plate cylinders are filled with new ink. Further, the unevenness of the ink density corresponding to the perforated portion of the printed master remaining on the surfaces of the first and second plate cylinders is leveled, and the ink density on the first and second plate cylinders is substantially reduced. The uniformity prevents bleeding, set-off during double-sided printing, and unevenness in density immediately after the start of printing, thereby further suppressing the occurrence of waste paper, and more effectively reducing printing costs. Can be.

According to the tenth or eleventh aspect of the present invention, when the next printing is performed from the state where the printed masters are wound on the first and second master support plates, the timing means is used. When the counted elapsed time exceeds an arbitrary predetermined time, the printed master is peeled off from the first and second master support plates, respectively, and new unprinted masters are respectively placed on the first and second master support plates. Wrapped around
By rotating the first and second plate cylinders a predetermined number of times while pressing the first and second plate cylinders via the unmade plate master, the first and second master support plates and the first and second master support plates are rotated. The ink which has adhered to the mesh screen provided in and has been reduced in viscosity by leaving is absorbed by the unmade master and removed from the first and second plate cylinders,
The first and second master support plates, and the mesh screens provided on the first and second master support plates are filled with new ink, and further, the printed masters remaining on the surface of each mesh screen. The ink density unevenness corresponding to the perforated portion is alleviated by the absorption of the ink into the unprinted master, and the ink density on the first and second plate cylinders is made uniform. In addition, it is possible to prevent the occurrence of density unevenness immediately after the start of printing and the set-off, thereby further suppressing the occurrence of waste paper, and more effectively reducing the printing cost.

According to the twelfth aspect of the present invention, when the next printing is performed from the state where the printed master is wound around the outer peripheral surfaces of the first and second plate cylinders, the time measuring means measures the time. When the elapsed time exceeds an arbitrary predetermined time, the printed master is peeled off from the outer peripheral surfaces of the first and second plate cylinders, respectively, and then a new unprinted master is attached to the outer peripheral surfaces of the first and second plate cylinders. The plate making master is wound, and the first and second plate cylinders are rotated a predetermined number of times while being pressed against each other via the unmade plate master, so that the first and second plate cylinders adhere to the first and second plate cylinders, As a result, the ink whose viscosity has been reduced is absorbed by the blank master and removed from the first and second plate cylinders, and the first and second plate cylinders are filled with new ink. The printed master remaining on the surface of the plate cylinder 2 The uneven density of the ink corresponding to the perforated portion is alleviated by the absorption of the ink into the unprinted master, and the ink density on the first and second plate cylinders is made uniform. In addition, it is possible to prevent the occurrence of density unevenness immediately after the start of printing and the set-off, thereby further suppressing the occurrence of waste paper, and more effectively reducing the printing cost.

According to the thirteenth aspect, the number of rotations of the first and second plate cylinders at the time of pressing the first plate cylinder and the second plate cylinder is determined according to the length of the elapsed time. By controlling, the number of rotations at the time of plate cylinder pressure contact can be controlled to the optimal number according to the state of the plate cylinder surface that changes with the change of the standing time, and the rise time at the time of printing after standing is the shortest. As a result, a good double-sided printed image can be obtained from the first sheet.

According to the fourteenth aspect of the present invention, the number of rotations of the first and second plate cylinders when the first plate cylinder and the second plate cylinder are pressed against each other is determined by detecting the length of the elapsed time and detecting the number of rotations. The number of rotations during plate cylinder pressure contact can be controlled to an optimal number according to the state of the plate cylinder surface that changes with changes in the standing time and the environmental temperature. A good double-sided printed image can be obtained from the first sheet while minimizing the rise time during post-printing.

According to the fifteenth aspect of the present invention, the number of rotations of the first and second plate cylinders when the first plate cylinder and the second plate cylinder are pressed against each other is determined by detecting the length of the elapsed time and detecting the number of rotations. By controlling based on the temperature and humidity, the number of rotations at the time of press-contacting the plate cylinder is controlled to an optimum number according to the state of the plate cylinder surface which changes with the change of the leaving time, the environmental temperature and the environmental humidity. This makes it possible to obtain a good double-sided printed image from the first sheet while minimizing the rise time during printing after standing.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a stencil printing machine used in first to fourth embodiments of the present invention.

FIG. 2 is a perspective view showing a plate cylinder used in the first to fourth embodiments of the present invention.

FIG. 3 is a front view of a flange used in the first to fourth embodiments of the present invention.

FIG. 4 is a side view of a flange used in the first to fourth embodiments of the present invention.

FIG. 5 is a partial side sectional view showing a main part of a printing section of the stencil printing apparatus used in the first to fourth embodiments of the present invention during printing.

FIG. 6 is a perspective view showing a plate cylinder used in the first to fourth embodiments of the present invention.

FIG. 7 is a side view showing a main part of a printing unit of the stencil printing apparatus used in the first to fourth embodiments of the present invention during non-printing.

FIG. 8 is a perspective view showing a first support member used in the first to fourth embodiments of the present invention.

FIG. 9 is a perspective view showing a base used in the first to fourth embodiments of the present invention.

FIG. 10 is a perspective view showing a stopper used in the first to fourth embodiments of the present invention.

FIG. 11 is a perspective view showing an ink supply pipe used in the first to fourth embodiments of the present invention.

FIG. 12 is a perspective view showing an ink supply pipe used in the first to fourth embodiments of the present invention.

FIG. 13 is a schematic diagram for explaining a plate cylinder driving means used in the first to fourth embodiments of the present invention.

FIG. 14 is a diagram showing an operation panel used in the first to fourth embodiments of the present invention.

FIG. 15 is a block diagram of control means used in the first embodiment of the present invention.

FIG. 16 is a side view showing a main part of a printing unit during printing of the stencil printing apparatus used in the first to fourth embodiments of the present invention.

FIG. 17 is a flowchart showing the operation of the first embodiment of the present invention.

FIG. 18 is a flowchart showing the operation of the second embodiment of the present invention.

FIG. 19 is a flowchart showing the operation of the third embodiment of the present invention.

FIG. 20 is a flowchart showing the operation of the fourth embodiment of the present invention.

FIG. 21 is a schematic side view of a stencil printing machine used in the fifth to eighth embodiments of the present invention.

FIG. 22 is a side view showing the contact / separation means used in the fifth to eighth embodiments of the present invention.

FIG. 23 is a block diagram of control means used in a fifth embodiment of the present invention.

FIG. 24 is a block diagram of control means used in a modification of the first embodiment of the present invention.

[Explanation of symbols]

1,174 stencil printing machine 33,40,190 New perforated master (master) 79,212 First plate cylinder 80,213 Second plate cylinder 83 First master support plate (porous support plate) 84 First Ink supply means 91 First ink roller moving means 95 First ink roller 106 Second master support plate (porous support plate) 107 Second ink supply means 108 Second ink roller moving means 117 Second Ink roller 165 Timer means 166, 169, 172, 173, 236, 237, 2
38, 239 Control means 167, 168, 199, 203 Printed master 221 Contacting / separating means P Printing paper

Claims (15)

[Claims] 1. A first plate cylinder having a first master support plate having flexibility, and a second master support plate having flexibility, the peripheral surface of which is provided on the first plate cylinder. And a first ink roller provided inside the first plate cylinder and rotatably pressed against the inner peripheral surface of the first master support plate. A second ink roller having a first ink supply means and a second ink roller provided inside the second plate cylinder and rotatable by being pressed against an inner peripheral surface of a second master support plate. Means for counting the time elapsed from the end of printing, and one of the first and second ink rollers is provided with a first
Alternatively, the one-step double-sided printing, which is movably supported by the second ink supply means at a separated position separated from the inner peripheral surface of the first or second master support plate and a pressure contact position pressed against the inner peripheral surface, A stencil printing method using a stencil printing apparatus capable of performing the above-mentioned elapsed time when the next printing is performed from a state in which a printed master is wound around each of the first and second master support plates. When a predetermined time has passed, the first and second master support plates are expanded by moving the one of the ink rollers from the separated position to the pressure contact position, thereby expanding the first and second master support plates. The plate cylinders are pressed against each other via the printed master and rotated a predetermined number of times, and then the printed master is peeled off from the first and second master support plates, respectively, and the first and second master support plates are separated. A stencil printing method, wherein a new stencil master is wound around each plate and printing is performed. 2. A first plate cylinder having a first master support plate having flexibility, and a second master support plate having flexibility, the peripheral surface of which is provided on the first plate cylinder. A second plate cylinder disposed close to the first plate cylinder, a first separation position provided inside the first plate cylinder and separated from the inner peripheral surface of the first master support plate, and pressed against the inner peripheral surface. A first ink roller that selectively occupies a first press-contact position, and a first ink supply unit that supplies ink to the first plate cylinder; and a first ink supply unit that is provided inside the second plate cylinder. A second ink roller opposed to the first ink roller, selectively occupying a second spaced position separated from the inner peripheral surface of the second master support plate and a second pressed position pressed against the inner peripheral surface; A second ink supply means for supplying ink to the second plate cylinder, and a first ink roller being moved from the first separated position to a first ink roller. First ink roller moving means for moving to the pressure contact position, second ink roller moving means for moving the second ink roller from the second separation position to the second pressure position, and elapsed time from the end of printing A stencil printing apparatus using a stencil printing apparatus capable of performing one-step double-sided printing, wherein printed masters are respectively wound around first and second master support plates. When the next printing is performed from the touched state, when the elapsed time exceeds an arbitrary predetermined time, the first and second printings are performed.
The first and second ink rollers are respectively moved to the first and second pressure contact positions by operating the ink roller moving means of (1), and the first and second master support plates are respectively expanded, whereby the first and second master support plates are expanded. And the second plate cylinder are pressed against each other via the printed master and rotated a predetermined number of times, and then the printed master is peeled off from the first and second master support plates, respectively, and the first and second masters are separated from each other. 2
A stencil printing method, wherein a new stencil master is wound around each of the master support plates for printing. 3. A first plate cylinder on which a master is wound on an outer peripheral surface and rotatable around its rotation axis, and a second plate cylinder on which a master is wound on an outer peripheral surface and rotatable around its rotation axis. A plate cylinder, contacting / separating means for moving the outer peripheral surface of the first plate cylinder and the outer peripheral surface of the second plate cylinder toward and away from each other, and timing means for measuring an elapsed time from the end of printing. A stencil printing method using a stencil printing apparatus capable of performing one-step double-sided printing, wherein the next printing is performed from a state in which printed masters are wound around outer peripheral surfaces of first and second plate cylinders, respectively. When the elapsed time exceeds an arbitrary predetermined time, the first and second plate cylinders are pressed against each other via the printed master by operating the contact / separation means, and each is rotated a predetermined number of times. Then, the printed master is first and second
A stencil printing method characterized in that the stencil printing method is carried out by peeling off from the outer peripheral surfaces of the plate cylinders, respectively, and wrapping new perforated masters on the outer peripheral surfaces of the first and second plate cylinders. 4. A first plate cylinder having a first master support plate having flexibility, and a second master support plate having flexibility, the peripheral surface of which is provided on the first plate cylinder. And a first ink roller provided inside the first plate cylinder and rotatably pressed against the inner peripheral surface of the first master support plate. A second ink roller having a first ink supply means and a second ink roller provided inside the second plate cylinder and rotatable by being pressed against an inner peripheral surface of a second master support plate. Means for counting the time elapsed from the end of printing, and one of the first and second ink rollers is provided with a first
Alternatively, the one-step double-sided printing, which is movably supported by the second ink supply means at a separated position separated from the inner peripheral surface of the first or second master support plate and a pressure contact position pressed against the inner peripheral surface, is performed. A stencil printing method using a stencil printing apparatus capable of performing the above-mentioned elapsed time when the next printing is performed from a state in which a printed master is wound around each of the first and second master support plates. When a predetermined time has passed, the printed master is separated from the first and second master support plates, and then the one ink roller is moved from the separated position to the press-contact position to remove the first master from the first position. Alternatively, by inflating the second master support plate, the first and second plate cylinders are pressed against each other and rotated a predetermined number of times, respectively.
Thereafter, a new stencil master is wound around each of the first and second master support plates to perform printing. 5. A first plate cylinder having a first master support plate having flexibility, and a second master support plate having flexibility, wherein a peripheral surface of the first plate cylinder is provided on the first plate cylinder. A second plate cylinder disposed close to the first plate cylinder, a first separation position provided inside the first plate cylinder and separated from the inner peripheral surface of the first master support plate, and pressed against the inner peripheral surface. A first ink roller that selectively occupies a first press-contact position, and a first ink supply unit that supplies ink to the first plate cylinder; and a first ink supply unit that is provided inside the second plate cylinder. A second ink roller opposed to the first ink roller, selectively occupying a second spaced position separated from the inner peripheral surface of the second master support plate and a second pressed position pressed against the inner peripheral surface; A second ink supply means for supplying ink to the second plate cylinder, and a first ink roller being moved from the first separated position to a first ink roller. First ink roller moving means for moving to the pressure contact position, second ink roller moving means for moving the second ink roller from the second separation position to the second pressure position, and elapsed time from the end of printing A stencil printing apparatus using a stencil printing apparatus capable of performing one-step double-sided printing, wherein printed masters are respectively wound around first and second master support plates. When the next printing is performed from the touched state, when the elapsed time exceeds an arbitrary predetermined time, the printed master is separated from the first and second master support plates, and then the first and second masters are separated. The first and second ink rollers are moved to the first and second press contact positions by operating the ink roller moving means, and the first and second master support plates are expanded, respectively. A stencil printing machine wherein the first and second plate cylinders are pressed against each other and rotated a predetermined number of times, respectively, and thereafter, printing is performed by winding a new plate-making master on the first and second master support plates, respectively. Printing method. 6. A first plate cylinder on which a master is wound on an outer peripheral surface and rotatable around its rotation axis, and a second plate cylinder on which a master is wound on an outer peripheral surface and rotatable around its rotational axis. A plate cylinder, contacting / separating means for moving the outer peripheral surface of the first plate cylinder and the outer peripheral surface of the second plate cylinder toward and away from each other, and timing means for measuring an elapsed time from the end of printing. A stencil printing method using a stencil printing apparatus capable of performing one-step double-sided printing, wherein the next printing is performed from a state in which printed masters are wound around outer peripheral surfaces of first and second plate cylinders, respectively. When the elapsed time exceeds an arbitrary predetermined time, the printed master is peeled off from the outer peripheral surfaces of the first and second plate cylinders, respectively, and then the first and second contacting / separating means are operated to operate the first and second printing units. The second plate cylinders are pressed against each other and rotated a predetermined number of times. A stencil printing method, wherein a new stencil master is wound around the outer peripheral surface of the second plate cylinder and printing is performed. 7. A first plate cylinder having a first master support plate having flexibility, and a second master support plate having flexibility, and a peripheral surface of the first plate cylinder is provided on the first plate cylinder. And a first ink roller provided inside the first plate cylinder and rotatably pressed against the inner peripheral surface of the first master support plate. A second ink roller having a first ink supply means and a second ink roller provided inside the second plate cylinder and rotatable by being pressed against an inner peripheral surface of a second master support plate. Means for counting the time elapsed from the end of printing, and one of the first and second ink rollers is provided with a first
Alternatively, the one-step double-sided printing, which is movably supported by the second ink supply means at a separated position separated from the inner peripheral surface of the first or second master support plate and a pressure contact position pressed against the inner peripheral surface, A stencil printing method using a stencil printing apparatus capable of performing the above-mentioned elapsed time when the next printing is performed from a state in which a printed master is wound around each of the first and second master support plates. When a predetermined time has passed, the first and second master support plates are expanded by moving the one of the ink rollers from the separated position to the pressure contact position, thereby expanding the first and second master support plates. The plate cylinders are pressed against each other via the printed master and rotated a predetermined number of times, and then the printed master is peeled off from the first and second master support plates, respectively, and then the one ink is re-printed. The roller is moved from the separation position to the pressure contact position, and the first and second plate cylinders are pressed against each other and rotated a predetermined number of times, respectively. A stencil printing method, wherein printing is performed by winding a master. 8. A first plate cylinder having a first master support plate having flexibility, and a second master support plate having flexibility, a peripheral surface of which is provided on the first plate cylinder. A second plate cylinder disposed close to the first plate cylinder, a first separation position provided inside the first plate cylinder and separated from the inner peripheral surface of the first master support plate, and pressed against the inner peripheral surface. A first ink roller that selectively occupies a first press-contact position, and a first ink supply unit that supplies ink to the first plate cylinder; and a first ink supply unit that is provided inside the second plate cylinder. A second ink roller opposed to the first ink roller, selectively occupying a second spaced position separated from the inner peripheral surface of the second master support plate and a second pressed position pressed against the inner peripheral surface; A second ink supply means for supplying ink to the second plate cylinder, and a first ink roller being moved from the first separated position to a first ink roller. First ink roller moving means for moving to the pressure contact position, second ink roller moving means for moving the second ink roller from the second separation position to the second pressure position, and elapsed time from the end of printing A stencil printing apparatus using a stencil printing apparatus capable of performing one-step double-sided printing, wherein printed masters are respectively wound around first and second master support plates. When the next printing is performed from the touched state, when the elapsed time exceeds an arbitrary predetermined time, the first and second printings are performed.
The first and second ink rollers are respectively moved to the first and second pressure contact positions by operating the ink roller moving means of (1), and the first and second master support plates are respectively expanded, whereby the first and second master support plates are expanded. And the second plate cylinder are pressed against each other via the printed master and rotated a predetermined number of times, and then the printed master is peeled off from the first and second master support plates, respectively, and then the first master is again removed.
And operating the second ink roller moving means to move the first and second ink rollers to the first and second press contact positions, respectively, to press the first and second plate cylinders against each other and to perform the predetermined number of presses, respectively. Only rotate, then the first
And a stencil printing method, wherein new stencil masters are wound around the second master support plate and printing is performed. 9. A first plate cylinder, on which a master is wound on an outer peripheral surface and rotatable around its rotation axis, and a second plate cylinder, on which a master is wound on an outer peripheral surface and rotatable around its rotation axis, are provided. A plate cylinder, contacting / separating means for moving the outer peripheral surface of the first plate cylinder and the outer peripheral surface of the second plate cylinder toward and away from each other, and timing means for measuring an elapsed time from the end of printing. A stencil printing method using a stencil printing apparatus capable of performing one-step double-sided printing, wherein the next printing is performed from a state in which printed masters are wound around outer peripheral surfaces of first and second plate cylinders, respectively. When the elapsed time exceeds an arbitrary predetermined time, the first and second plate cylinders are pressed against each other via the printed master by operating the contact / separation means, and each is rotated a predetermined number of times. Then, the printed master is first and second
After being separated from the outer peripheral surface of the plate cylinder, the contacting / separating means is operated again to press and contact the first and second plate cylinders with each other and rotate them a predetermined number of times.
And a stencil printing method, wherein a new stencil master is wound around the outer peripheral surface of the second plate cylinder and printing is performed. 10. A first plate cylinder having a first master support plate having flexibility, and a second master support plate having flexibility, wherein a peripheral surface of the first plate cylinder is provided on the first plate cylinder. And a first ink roller provided inside the first plate cylinder and rotatably pressed against the inner peripheral surface of the first master support plate. A second ink roller having a first ink supply means and a second ink roller provided inside the second plate cylinder and rotatable by being pressed against an inner peripheral surface of a second master support plate. Means for counting the time elapsed from the end of printing, and one of the first and second ink rollers is provided with a first
Alternatively, the one-step double-sided printing, which is movably supported by the second ink supply means at a separated position separated from the inner peripheral surface of the first or second master support plate and a pressure contact position pressed against the inner peripheral surface, is performed. A stencil printing method using a stencil printing apparatus capable of performing the above-mentioned elapsed time when the next printing is performed from a state in which a printed master is wound around each of the first and second master support plates. Exceeds a predetermined time, the printed master is peeled off from the first and second master support plates, respectively, and then a new blank master is wound on each of the first and second master support plates. By moving one of the ink rollers from the separation position to the press-contact position to expand the first or second master support plate, the first and second plate cylinders are mutually moved via the unmade plate master. When pressed Each of them is rotated a predetermined number of times, and then the unprinted masters are peeled off from the first and second master support plates, respectively, and the new masters are wound around the first and second master support plates and printed. Stencil printing method characterized by performing the following. 11. A first plate cylinder having a first master support plate having flexibility, and a second master support plate having flexibility, the peripheral surface of which is provided on the first plate cylinder. A second plate cylinder disposed close to the first plate cylinder, a first separation position provided inside the first plate cylinder and separated from the inner peripheral surface of the first master support plate, and pressed against the inner peripheral surface. A first ink roller that selectively occupies a first press-contact position, and a first ink supply unit that supplies ink to the first plate cylinder; and a first ink supply unit that is provided inside the second plate cylinder. A second ink roller opposed to the first ink roller, selectively occupying a second spaced position separated from the inner peripheral surface of the second master support plate and a second pressed position pressed against the inner peripheral surface; A second ink supply means for supplying ink to the second plate cylinder, and a first ink roller being firstly moved from a first separated position. First ink roller moving means for moving the second ink roller from the second separation position to the second pressure position, and a passage from the end of printing. A stencil printing method using a stencil printing apparatus capable of performing one-step double-sided printing, comprising a time counting means for counting time, wherein the printed masters are respectively wound around first and second master support plates. When the next printing is performed from the state after the printing, when the elapsed time exceeds an arbitrary predetermined time, the printed master is separated from the first and second master support plates, and then the first and second masters are separated. New master plates are wound around the respective master support plates, and the first and second ink roller moving means are operated to move the first and second ink rollers to the first and second pressure contact positions, respectively. Is, by swelling the first and second master support plate, respectively,
The first and second plate cylinders are pressed against each other via the unmade master and rotated a predetermined number of times, respectively, and then the unmade master is peeled from the first and second master support plates, respectively. And a stencil printing method, wherein new stencil masters are wound around the second master support plate and printing is performed. 12. A first plate cylinder having a master wound around its outer peripheral surface and rotatable around its rotation axis, and a second plate cylinder wound around its outer peripheral surface and rotatable around its rotation axis. A plate cylinder, contacting / separating means for moving the outer peripheral surface of the first plate cylinder and the outer peripheral surface of the second plate cylinder toward and away from each other, and timing means for measuring an elapsed time from the end of printing. A stencil printing method using a stencil printing apparatus capable of performing one-step double-sided printing, wherein the next printing is performed from a state in which printed masters are wound around outer peripheral surfaces of first and second plate cylinders, respectively. When the elapsed time exceeds an arbitrary predetermined time, the printed master is peeled off from the outer peripheral surfaces of the first and second plate cylinders, and then the printed master is removed from the outer peripheral surfaces of the first and second plate cylinders. Each new unprinted master is wound, and the contacting / separating means is operated to set the first master.
And the second plate cylinder is pressed against each other via the blank plate master and rotated a predetermined number of times,
The unprinted masters are peeled from the outer peripheral surfaces of the first and second plate cylinders, respectively, and printing is performed by winding new pre-made masters on the outer peripheral surfaces of the first and second plate cylinders, respectively. Stencil printing method. 13. The method according to claim 1, wherein the number of rotations of the first and second plate cylinders at the time of pressing the first plate cylinder and the second plate cylinder is controlled according to the length of the elapsed time. The stencil printing method according to any one of claims 1 to 12. 14. The stencil printing machine further comprises a temperature detecting means for detecting a temperature inside the machine, wherein the first and second plate cylinders rotate when the first and second plate cylinders are pressed against each other. 14. The stencil printing method according to claim 13, wherein the number of times is corrected based on the temperature detected by said temperature detecting means. 15. The stencil printing machine further comprises humidity detecting means for detecting humidity inside the machine, and rotation of the first and second plate cylinders when the first and second plate cylinders are pressed against each other. 15. The stencil printing method according to claim 14, wherein the number of times is corrected based on the temperature detected by the temperature detecting means and the humidity detected by the humidity detecting means.