JP2013169718A - Stencil printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stencil printer which sets necessity of security protection of a plate making image, prohibits an image display of the plate making image specified as the security protection surely by a plate making image unit, and has a high information security.SOLUTION: A stencil printer includes at least an image reading means 7, a plate making means 3, a plate cylinder unit 120, a plate discharging means 5 and a controlling means 20, furthermore includes a plate making image storing means 40, a means 31 to input a setting by a plate image unit that security protection is specified, a plate making image displaying means 32 to display a plate making image in an operation portion, and a storage device of the plate cylinder unit to store a plate making image number given to the plate making image of a stencil paper which the plate cylinder unit has, confirms from the plate making image number the presence or absence about specification of the security protection of the corresponding plate making image when the controlling means 20 is requested to display the plate making image mounted to a plate cylinder 12, and controls displaying the corresponding plate making image by calling from the plate making image storing means only when the security protection is not specified.

Description

  The present invention relates to a stencil printing apparatus, and more particularly to display of a platemaking image.

  Conventionally, digital thermal stencil printing by a stencil printing apparatus is known as a simple printing method. This is done by bringing a thermal head, in which fine heating elements are arranged in a row, into contact with a heat-sensitive stencil sheet (hereinafter also referred to as “master”) obtained by laminating a thermoplastic resin film and an ink-permeable porous support. In addition, while the master was transported by a master transport means such as a platen roller while energizing the heating element in a pulsed manner, the thermoplastic resin film portion of the master was heated, melted and perforated in accordance with image information to form a perforated image. After that, the pre-printed master is wound around the plate cylinder, and the printing paper is pressed against the outer peripheral surface of the porous cylindrical plate cylinder by pressing means such as a press roller, so that the opening portion of the plate cylinder and the master Ink is exuded from the perforated portion, and this ink is transferred to the printing paper to obtain a printed image.

In the stencil printing apparatus, the plate-making plate is wound around the plate cylinder of the plate cylinder unit in a reverse image state. The plate cylinder unit is detachable from the printing apparatus main body. Since it is difficult to determine what kind of image the plate wound on the plate cylinder of the currently installed plate cylinder unit is, a technology that can be confirmed by displaying a plate-making image from an operation panel or the like is already known ( For example, see Patent Document 1).
In Patent Document 1, an apparatus capable of duplex printing confirms at least one of the front and back direction of the double-sided image and the image position on the front and back sides of the paper before starting the plate making for double-sided printing in order to save the master. A technique for creating a double-sided image as possible is disclosed.

  On the other hand, in a stencil printing apparatus, there has been proposed a stencil printing apparatus capable of setting a confidentiality mode when it is not desired to know the printed matter and the contents of the master that has been made by a person other than the person who performs printing (for example, Patent Literature 2).

  Japanese Patent Laid-Open No. 2004-228561 stores information that the confidentiality mode is set in the storage device of the plate cylinder, and does not perform printing operation of the plate cylinder drum that is set to the confidentiality mode, and performs backup when the plate cylinder is detached. A functional device is described.

  The stencil printing apparatus is widely used for printing test questions in educational institutions and printing confidential materials in government offices. Technology that makes the plate cylinder unit non-detachable in security mode to ensure information security when the plate is left attached to the plate cylinder after printing a document that requires confidentiality. Is already known.

  However, when the image can be easily confirmed by the preview display of the plate-making image, it is extremely difficult to ensure information security only with the above-described measures. There is a need for control for reliably discriminating plate-making images having confidential information and preventing them from being displayed.

  Therefore, in view of the above-mentioned problems, the present invention sets the necessity of confidentiality of plate-making images, and provides high information security capable of reliably prohibiting image display of plate-making images designated for confidentiality in units of plate-making images. An object of the present invention is to provide a stencil printing apparatus.

In order to solve the above-described problems, a stencil printing apparatus according to the present invention includes:
Removable plate cylinder including image reading means for reading an image, plate making means for making a stencil sheet on the basis of image data read by the image reading means, and a plate cylinder on which the stencil sheet on which the plate making has been made is wound In a stencil printing apparatus comprising at least a unit, a stencil discharging unit for discharging the stencil sheet from the plate cylinder, and a control unit, and performing a stencil making process comprising an image reading operation, a stencil making operation, a winding operation, and a stencil discharging operation,
Plate-making image storage means for storing a plate-making image for plate-making the stencil sheet;
Based on the necessity of confidentiality of the prepress image, a means for inputting the confidentiality designation setting for each prepress image,
Plate-making image display means for displaying the plate-making image stored in the plate-making image storage means on the operation unit;
A plate cylinder unit storage device for storing a platemaking image number assigned to a platemaking image of a stencil sheet held by the plate cylinder unit;
When the control means is requested to display a plate-making image mounted on the plate cylinder, it confirms whether or not the corresponding plate-making image has a confidentiality designation from the plate-making image number, and only when there is no confidentiality designation. The stencil printing apparatus performs control for calling and displaying a corresponding plate-making image from the plate-making image storage means.

  According to the stencil printing apparatus of the present invention, a stencil having high information security capable of setting a confidentiality designation of a stencil image and reliably prohibiting image display of the stencil image designated as a confidentiality for each stencil image. A printing device can be provided.

It is a schematic front view which shows one embodiment of the stencil printing apparatus of this invention. It is a block diagram explaining an example of the control means of the stencil printing apparatus of the present invention. It is a block diagram explaining the example of the principal part of the control means of the stencil printing apparatus of this invention. It is a flowchart which shows an example of the flow of a display of a platemaking image. It is a flowchart which shows an example of the flow of recording to an image storage device.

  Hereinafter, a stencil printing apparatus according to the present invention will be described with reference to the drawings. It should be noted that the present invention is not limited to the embodiments of the examples shown below, and other embodiments, additions, modifications, deletions, and the like can be changed within a range that can be conceived by those skilled in the art. Any aspect is included in the scope of the present invention as long as the operations and effects of the present invention are exhibited.

  The stencil printing apparatus of the present invention includes an image reading means for reading an image, a plate making means for making a stencil sheet on the basis of image data read by the image reading means, and a plate on which the stencil sheet on which the stencil has been made is wound. A detachable plate cylinder unit including a cylinder, a plate discharging means for discharging the stencil sheet from the plate cylinder, and a control means are provided. The plate cylinder unit can be attached and detached while the stencil sheet is mounted.

FIG. 1 shows a schematic front view of a stencil printing apparatus 1 capable of duplex printing which is one embodiment of the present invention.
As shown in FIG. 1, a stencil printing apparatus 1 includes a printing unit 2, a plate making unit (plate making unit) 3, a paper feeding unit 4, a plate discharging unit (plate discharging unit) 5, a paper discharge unit 6, an image reading unit (image reading unit). ) 7, a refeed tray 8, a refeed means 9, a switching member 10 as a switching means, a plate cylinder 12, and the like. The plate cylinder unit is mainly composed of the plate cylinder 12 and other mechanism parts (for example, a support shaft 14, a frame fixed to both ends of the support shaft 14, a plate cylinder gear, an ink supply device 15 and the like). The

The printing unit 2 is disposed substantially at the center of the apparatus main body 11 and includes a plate cylinder 12 and a press roller 13.
The plate cylinder 12 includes a drum flange as a pair of end plates (not shown) that is rotatably supported by a support shaft 14 that also serves as an ink supply pipe, and a plate cylinder that is wound and fixed to the outer peripheral surface of each drum flange. This is mainly composed of a porous support plate (not shown) and a mesh screen (not shown) wound around the outer peripheral surface of the porous support plate (not shown). The plate cylinder unit 12 is rotationally driven by a plate cylinder driving unit (not shown) having the main motor and the like via a driving force transmission unit having a gear and an endless belt (not shown) and is detachable from the apparatus main body 11. It is configured. The plate cylinder 12 has a size capable of obtaining a maximum A3 size printed material during single-sided printing.

  An ink supply means 15 is disposed inside the plate cylinder 12. The ink supply means 15 includes a support shaft 14, an ink roller 16, a doctor roller 17, and the like. The ink roller 16 is rotatably supported between side plates (not shown) provided in the plate cylinder 12, and its peripheral surface is disposed close to the inner peripheral surface of the plate cylinder 12. The rotational force is transmitted and the rotational force is driven in the same direction as the plate cylinder 12. The doctor roller 17 is also rotatably supported between the side plates, and its peripheral surface is disposed close to the peripheral surface of the ink roller 16 and is driven to rotate in the direction opposite to the plate cylinder 12. A plurality of small holes are formed in the support shaft 14, and the ink supplied from the support shaft 14 is collected in a wedge-shaped space formed in the vicinity of the ink roller 16 and the doctor roller 17. An ink reservoir 18 is formed.

  On the outer peripheral surface of the plate cylinder 12, a stage portion that forms a plane along one generatrix of the plate cylinder 12 is formed. On this, a clamper that holds the leading end of the master on the outer peripheral surface of the plate cylinder 12. 19 is disposed. The clamper 19 is opened and closed by an opening / closing means (not shown) when the plate cylinder 12 is rotated to a predetermined position.

  A press roller 13 is disposed below the plate cylinder 12. The press roller 13 is configured by winding an elastic body such as rubber around a metal core 13 a and is provided so as to extend in the axial direction of the plate cylinder 12. The press roller 13 is rotatably supported at both ends of the core portion 13a by a pair of arm members (not shown). Each arm member has a substantially L shape, and is integrated by a swing shaft attached to a portion near the bent portion, and the swing shaft is rotatably supported by the apparatus main body 11.

A refeed resist roller 23 is disposed below the press roller 13.
A refeed positioning member 24 is disposed near the upper portion of the refeed resist roller 23. The refeed positioning member 24 has a notch (not shown) for preventing the refeed registration roller 23 from colliding with the swing.
A refeed conveyance unit 25 is disposed below the press roller 13 and to the left of the refeed positioning member 24. The refeeding conveyance unit 25 has a refeeding tray 8 integrally on its upper surface.

A cleaning roller 26 that cleans the peripheral surface of the press roller 13 is disposed in the vicinity of the press roller 13 and above the refeed conveyance unit 25. The cleaning roller 26 having substantially the same width as that of the press roller 13 has at least a surface made of a highly hygroscopic material such as Japanese paper or sponge, and has a core portion integrally at the center thereof.
A guide plate 27 is disposed on the upper left side of the cleaning roller 26. The guide plate 27 is made of a plate material, and both ends of the guide plate 27 are fixed to each arm member. The sheet P pressed against the plate cylinder 12 by the press roller 13 does not touch the cleaning roller 26 and is re-feeded. Guide to the tray 8. The guide plate 27 is disposed at a position close to the peripheral surfaces of the press roller 13 and the cleaning roller 26.

On the left side of the contact position between the plate cylinder 12 and the press roller 13 and on the transport path of the paper P, a switching member 10 for switching the transport path of the paper P is disposed. The switching member 10 is made of a plate material having substantially the same width as that of the plate cylinder 12 and the press roller 13, and is fixed to a support shaft rotatably supported by the apparatus main body 11 at the downstream end in the paper transport direction. When the solenoid is actuated, the upstream end portion in the sheet conveyance direction formed with an acute cross section is selectively positioned at a first position indicated by a solid line and a second position indicated by a two-dot chain line in FIG.
When the switching member 10 occupies the first position, its front end is close to the peripheral surface of the press roller 13 and is not positioned to interfere with the clamper 19 on the plate cylinder 12 and occupies the second position. The tip of the plate cylinder 12 is placed close to the peripheral surface of the plate cylinder 12. The paper P passing between the plate cylinder 12 and the press roller 13 is guided to the paper discharge unit 6 when the switching member 10 occupies the first position, and the switching member 10 occupies the second position. Sometimes, it is guided to the refeed tray 8 through the guide plate 27 and the guide plate 56 fixed to the apparatus main body 11.

A plate making unit 3 is disposed on the upper right side of the apparatus main body 11. The plate making unit 3 includes a master holding member 57, a platen roller 58, a thermal head 59, a cutting means 60, a master stock unit 61, a tension roller pair 62, a reverse roller pair 63, and the like.
The master holding members 57 are respectively provided on a pair of side plates (not shown) of the apparatus main body 11, and a master roll 64a formed by winding a master 64 in which a thermoplastic resin film and a porous support are bonded together in a roll shape. Both ends of the core part 64b are supported rotatably and detachably.

  A platen roller 58 provided on the left side of the master holding member 57 is rotatably supported on a side plate (not shown) of the apparatus main body 11 and is rotationally driven by a plate making driving means including a stepping motor. A thermal head 59 having a large number of heating elements located below the platen roller 58 is attached to a side plate (not shown) of the apparatus main body 11, and the surface of the heating element is applied to the platen roller 58 by a biasing force of a biasing means (not shown). It is in pressure contact. The thermal head 59 selectively generates heat from the heating element while being in contact with the surface of the thermoplastic resin film of the master 64, and performs hot-melt perforation plate-making selectively with respect to the master 64.

A cutting means 60 is disposed on the left side of the platen roller 58 and the thermal head 59. The cutting means 60 has a fixed blade 60a fixed to a frame (not shown) of the apparatus main body 11 and a movable blade 60b supported movably on the fixed blade 60a. The movable blade 60b is movable with respect to the fixed blade 60a. This is a known configuration in which the master 64 is cut by rotating.
A master stock portion 61 is disposed below the cutting means 60 on the downstream side in the master conveyance direction. The master stock section 61 has a space for temporarily storing the master that has been made, and is partitioned by a plurality of plate members, and a suction fan (not shown) is disposed at the innermost portion. When this suction fan is operated, negative pressure is generated inside the master stock unit 61 that is a sealed space, and the master-making master that has been transported by plate making is stored toward the innermost part of the master stock unit 61. Is done.

  A tension roller pair 62 is disposed at a portion between the cutting means 60 and the master stock portion 61. The tension roller pair 62 includes a driving roller 62a and a driven roller 62b that are rotatably supported by a side plate (not shown) of the apparatus main body 11, and the driven roller 62b has a peripheral surface of the driving roller 62a by an urging means (not shown). The master roller 64 is sandwiched and conveyed by the driving roller 62 a being rotationally driven by the plate-making driving means 124.

  The drive roller 62 a has a peripheral speed set slightly higher than the peripheral speed of the platen roller 58, and a torque limiter (not shown) is provided inside the drive roller 62 a, and between the platen roller 58 and the tension roller pair 62. A predetermined tension is applied to the master 64.

  On the downstream side of the master stock unit 61 in the master conveyance direction, a pair of reverse rollers 63 each including a driving roller 63a and a driven roller 63b that are rotatably supported by a side plate (not shown) of the apparatus main body 11 is disposed. The reverse roller pair 63 sandwiches and conveys the master 64 by a driving roller 63a that is rotationally driven by the plate-making driving means 124 and a driven roller 63b that is pressed against the driving roller 63a (not shown). A one-way clutch (not shown) is provided inside the driving roller 63a.

  A movable master guide plate (not shown) is disposed between the tension roller pair 62 and the reverse roller pair 63. The movable master guide plate is swingably supported by a support member (not shown), and a solenoid (not shown) moves the upper surface of the master 64 so that the master 64 enters the master stock unit 61. It is selectively positioned at a retracted position that does not obstruct.

  A sheet feeding unit 4 is disposed below the plate making unit 3. The paper feed unit 4 includes a paper feed tray 67, a paper feed roller 68, a separation roller 69, a separation pad 70, a registration roller pair 71, and the like. A paper feed tray 67 on which a large number of sheets P can be stacked on the upper surface is supported by the apparatus main body 11 so as to be movable up and down, and is moved up and down by a paper feed driving unit including an elevating unit. A pair of side fences 72 are provided on the upper surface of the paper feed tray 67 on which A3 size paper P can be placed vertically and supported by a rail member (not shown) so as to be movable in the paper width direction perpendicular to the paper transport direction. .

  A plurality of paper size detection sensors 73 for detecting the size of the stacked paper P are provided on the free end side of the paper feed tray 67. The paper size sensor 73 functioning as a paper size detection unit has a known configuration that detects the size and orientation (vertical or horizontal) of the paper P by a combination of sensors.

  Above the paper feed tray 67, a paper feed roller 68 having a high frictional resistance member on the surface is disposed. The paper feed roller 68 is rotatably supported by a bracket (not shown) supported by the apparatus main body 11 so as to be swingable. When the paper feed tray 67 is lifted by lifting means (not shown), paper is fed with a predetermined pressure contact force. The uppermost sheet P on the tray 67 is pressed against. The paper feed roller 68 is rotationally driven by the paper feed driving means 125.

  On the left side of the paper feed roller 68, a separation roller 69 and a separation pad 70 each having a high friction resistance member on the surface are disposed. The separation roller 69 is drivingly connected to the paper feed roller 68 via a timing belt 69a, and is driven to rotate in the same direction in synchronism with the rotation of the paper feed roller 68. The separation pad 70 is pressed against the separation roller 69 by a biasing force of a biasing means (not shown).

  A registration roller pair 71 is disposed on the left side of the separation roller 69 and the separation pad 70. The registration roller pair 71 includes a driving roller 71a and a driven roller 71b. The driving roller 71a is rotated at a predetermined timing synchronized with the plate cylinder 12 by a registration roller driving motor (not shown) included in the sheet feeding driving unit 125, and is driven. The paper P is fed toward the printing unit 2 at a predetermined timing by a driven roller 71b pressed against the roller 71a.

At the upper left of the printing unit 2, a plate removal unit 5 is disposed. The plate discharging unit 5 includes an upper plate discharging member 74, a lower plate discharging member 75, a plate discharging box 76, a compression plate 77, and the like.
The upper plate removal member 74 has a drive roller 78, a driven roller 79, an endless belt 80, and the like. When the drive roller 78 is driven to rotate clockwise in the drawing by a plate discharge drive means (not shown), the endless belt 80 is moved in the direction of the arrow. Move to.

The lower plate removing member 75 includes a driving roller 81, a driven roller 82, an endless belt 83, and the like, and transmits the driving force of the plate discharging driving means 126 that rotationally drives the driving roller 78 by a driving force transmitting means (not shown) such as a gear or a belt. As a result, the drive roller 81 is rotationally driven in the counterclockwise direction in the figure, whereby the endless belt 83 moves in the arrow direction in FIG.
Further, the lower plate removing member 75 is movably provided by a moving unit (not shown) included in the plate discharging driving unit 126, and an endless belt 83 positioned on the outer peripheral surface of the driven roller 82 and the position shown in the drawing is provided. And a position that abuts on the outer peripheral surface.

  The plate removal box 76 is a container that stores a used master therein, and is detachably attached to the apparatus main body 11. A compression plate 77 that pushes the used master carried by the upper plate removal member 74 and the lower plate removal member 75 into the plate release box 76 is supported by the apparatus main body 11 so as to be movable up and down, and is included in the plate discharge drive means 126. It is moved up and down by the lifting means.

A paper discharge unit 6 is disposed below the plate discharge unit 5. The paper discharge unit 6 includes a peeling claw 84, a paper discharge transport unit 85, a paper discharge tray 86, and the like.
A plurality of peeling claws 84 are arranged in the width direction of the plate cylinder 12, and are integrally attached to respective support shafts that are swingably supported by the apparatus main body 11. The plurality of peeling claws 84 are swung by a claw rocking means (not shown), and the tips thereof are positioned so as to be close to the peripheral surface of the plate cylinder 12 and the tips thereof are arranged to avoid obstacles such as the clamper 19. It selectively occupies a position away from the outer peripheral surface of the plate cylinder 12. The claw swinging means (not shown) transmits the driving force from the plate cylinder driving means by the driving force transmission means (not shown), and swings the peeling claw 84 in synchronization with the rotation of the plate cylinder 12.

  A paper discharge conveyance unit 85 disposed below the peeling claw 84 and to the left of the switching member 10 includes a driving roller 87, a driven roller 88, an endless belt 89, a suction fan 90, and the like. A plurality of roller-shaped drive rollers 87 are attached to a support shaft (not shown) rotatably supported on a unit side plate (not shown) at a predetermined interval, and are respectively rotated and driven integrally by a paper discharge drive means (not shown).

A plurality of driven rollers 88 are also provided on a support shaft (not shown) rotatably supported on the same side plate at equal intervals with each drive roller 87, and a plurality of holes are provided in each drive roller 87 and each corresponding driven roller 88 corresponding thereto. The endless belts 89 having the above are stretched over each other. A suction fan 90 is disposed below the driving roller 87, the driven roller 88, and the endless belt 89. The paper discharge transport unit 85 sucks the paper P onto each endless belt 89 by the suction force of the suction fan 90, and transports the paper P in the direction of the arrow in FIG.
A paper discharge tray 86 on which the paper P conveyed by the paper discharge transport unit 85 is stacked is provided with one end fence 91 movable in the paper transport direction and a pair of side fences 92 movable in the paper width direction. And have.

  An image reading unit 7 is disposed on the upper part of the printing apparatus main body 11. The image reading unit 7 includes a contact glass 93 on which an original is placed, a pressure plate 94 provided so as to be able to contact with and separate from the contact glass 93, reflection mirrors 95, 96, 97, and 98 that scan and read an original image, and a fluorescent lamp. 99, a lens 100 for converging a scanned document image, an image sensor 101 such as a CCD for photoelectrically converting the focused image, a plurality of document size detection sensors 102 for detecting the document size, and the like. The image reading operation is performed by the operation of the reading driving means 128 (see FIG. 5).

Analog image data (image information) subjected to photoelectric conversion processing by the image sensor 101 is converted into digital image data (image information) by an A / D converter, and further known image processing is performed by a CCD image processing unit. Then, it is transmitted / input to the control means. Further, the digital image data is subjected to thermal head driving processing (mirroring) in the thermal head image processing unit under the control of the control means, and is transmitted to the thermal head 59 via the thermal head driving circuit.
A document size sensor 102 that functions as a document size detection unit has a known configuration that detects the size and orientation (portrait or landscape) of a document by a combination of sensors.

The stencil printing apparatus 1 further includes a stencil image storage unit for storing a stencil image for making a stencil sheet, and a unit for inputting a security setting designation in units of a stencil image based on whether or not the security of the stencil image is required. And a plate-making image display means for displaying the plate-making image stored in the plate-making image storage means on the operation unit, and a storage device for the plate cylinder unit.
The storage device of the plate cylinder unit can store the plate-making image number assigned to the plate-making image of the stencil sheet, and can also store the plate-making image number and the presence / absence of confidentiality designation.

In the aspect in which the control unit stores the plate-making image number assigned to the plate-making image of the stencil sheet held by the storage device of the plate cylinder unit, display of the plate-making image attached to the plate cylinder is requested. At this time, the presence or absence of the confidentiality designation of the corresponding platemaking image is confirmed from the platemaking image number, and only when there is no confidentiality designation, the corresponding platemaking image is called from the platemaking image storage means and displayed.
On the other hand, when the storage device of the plate cylinder unit stores the plate-making image number and the presence / absence of confidentiality designation, when the display of the plate-making image attached to the plate cylinder is requested, the control means Only when the plate making image number is not designated for confidentiality, the corresponding plate making image is called from the plate making image storage means and displayed.

FIG. 2 is an example of a block diagram of the control means used in the stencil printing apparatus 1.
As shown in FIG. 2, the control means 20 is a microcomputer having a CPU 43, ROM 44, RAM 45, etc. therein, and printing is performed based on operation signals and detection signals from the storage device 121 of the plate cylinder unit 120 and the operation unit 30. Section 2, plate making section 3, sheet feeding section 4, plate discharging section 5, paper discharge section 6, image reading section (image reading section) 7, image memory 40 (plate making image storage section), sheet refeed section 9, switching member 10 The display unit of the operation unit 30 and the operation of the plate cylinder unit 120 are controlled.

  The ROM 44 stores an operation program for the stencil printing apparatus 1, and the RAM 45 temporarily stores information such as various numerical values and data of the plate-making image (plate-making image number, necessity of confidentiality). Operation control of the stencil printing apparatus 1 is performed based on numerical values and information stored in the RAM 45 and an operation program called from the ROM 44.

  In the stencil printing apparatus 1, when a document is set in the image reading unit 7 and a start of plate making is instructed, the plate making unit 3 is operated and the plate making operation is performed after the plate discharging unit 5 is operated and the plate discharging operation is performed. The master plate is wound around the plate cylinder 12 to enter a single-sided printing standby state. After that, when the number of prints is set and a print start is instructed, the paper P is continuously fed from the paper feed unit 4 and a single-sided printing operation is performed. When the set number of printed sheets is reached, the single-sided printing operation is completed, and the stencil printing apparatus 1 enters the single-sided printing standby state again.

  In addition, by instructing the start of plate making after the original is set in the image reading unit 7 and the start of duplex printing is instructed, the plate making unit 3 is operated after the plate discharging unit 5 is operated and the plate discharging operation is performed. The operation is performed, and the divided master-printed master is wound around the plate cylinder 12 to enter the duplex printing standby state. After that, when the number of prints is set and the start of printing is instructed, the paper P is continuously fed from the paper feed unit 4 and double-sided printing is performed. When the set number of printed sheets is reached, the double-sided printing operation is completed, and the stencil printing apparatus 1 enters the double-sided printing standby state again.

FIG. 3 is an example of a principal block diagram of the control means related to the control for prohibiting image display of a plate-making image designated for confidentiality in a plate-making image unit in the stencil printing apparatus of the present invention.
As shown in FIG. 2, the stencil printing apparatus 1 includes an operation unit 30, and the operation unit 30 includes a confidentiality designation setting input unit 31 and a platemaking image image display unit 32.
The plate cylinder unit 120 can be attached to and detached from the stencil printing apparatus 1, and the plate cylinder unit 120 includes a storage device 121.
The storage device 121 stores information regarding the presence / absence of a master attached to the plate cylinder unit 120 and the presence / absence of confidentiality designation. The presence / absence of a master mounted on the plate cylinder unit 120 indicates whether the master is normally wound around the plate cylinder 12.

In the stencil printing apparatus 1, plate making of an image requiring confidentiality is carried out in a security mode. Masters made during operation in this security mode are entered as “confidentiality specified”, and masters made in operation with security mode released are entered as “no confidentiality specified”. Presence / absence is stored in the control device 20 and further in the storage device 121 of the plate cylinder unit.
The setting of the security mode at the time of plate making is performed (by an operator who knows that the image to be made is an image including confidential information).

The storage device 121 of the plate cylinder unit is a non-volatile memory that can hold data for a certain period of time without being supplied with power. As a result, even when the stencil printing apparatus 1 is detached from the stencil printing apparatus 1 together with the plate cylinder unit 120, it is possible to store the plate making image number and the security information.
When the plate cylinder unit 120 is attached to the stencil printing apparatus 1, the control device 30 reads information on the presence / absence of a master attached to the plate cylinder unit and the presence / absence of confidentiality designation from the storage device 121 of the plate cylinder unit. Based on the read information, the control device 20 determines whether or not to display a plate-making image. This flow is shown in FIG.

FIG. 4 is a flowchart showing the flow of the plate making image image display process in the control means 20.
As shown in FIG. 4, when a display image image display command is issued from the control means in the stencil printing machine (S1), the “plate making image number” and “plate cylinder unit” are loaded from the storage device 121 of the plate cylinder unit. Information on “Presence / absence of master (base paper)” and “Presence / absence of confidentiality designation” is read (S2). Note that the information stored in the control device 20 may be read as information on the presence / absence of confidentiality designation.
From the read information, it is determined whether or not the base paper is mounted on the plate cylinder unit (S3).
If the base cylinder is not attached to the plate cylinder unit, the prepress image cannot be displayed, so that the base cylinder 120 is displayed with no base paper attached (S4).
If a base paper is mounted on the plate cylinder unit 120, it is determined whether or not a confidentiality designation setting has been input for the mounted base paper (S5).
If there is an input for setting confidentiality designation, the prepress image is not displayed, and it is displayed that it cannot be displayed because it is confidential information (S6).
If a base paper is attached to the plate cylinder unit 120 and there is no setting input for confidentiality designation, a plate-making image of the attached base paper is displayed (S7).

When the plate making operation is started, information on the presence / absence of the master mounted on the plate cylinder unit 120, the plate making image number, and the presence / absence of confidentiality designation is written in the storage device 121 of the plate cylinder unit.
FIG. 5 is a flowchart showing the flow of processing for writing information relating to the presence / absence of designation of confidentiality of stencil paper to the storage device 121 of the plate cylinder unit.
The writing process is started from the end of the plate making (S11), and it is determined whether or not the plate making process is normally completed (S12). The normal completion of the plate making process means that the operations up to the plate removal, plate feeding and winding operations are normally performed and the master (base paper) is normally wound around the plate cylinder unit 120.
When the plate making process is normally completed, the base paper mounting flag is set to ON because the base paper is normally mounted on the plate cylinder unit 120 (S13).
If it is not normal end in Step 12, that is, if an abnormality occurs in any of the plate removal, feeding, and winding operations, and the abnormal end is found, the base paper is not properly loaded in the plate cylinder unit 120 or the base paper is Since it is not loaded, the base paper loading flag is turned off (S14).
After finishing the process of turning on the base paper attachment flag in S13, it is confirmed whether or not the security mode of the stencil printing apparatus 1 is operating (S15). If the security mode is not in operation, the confidentiality designation setting input flag is turned off (S16). If the security mode is in operation, the confidentiality designation setting input flag is turned ON (S17).
When the process proceeds to S16 or S17, “presence / absence of base paper loaded on the plate cylinder unit” and “presence / absence of confidentiality designation” are stored in the main body as flag information. The data is written in the storage device 121 (S18) and the process ends.

  As described above, according to the stencil printing apparatus of the present invention, it is possible to set the confidentiality designation of the platemaking image and reliably prohibit the image display of the platemaking image designated for the confidentiality in units of the platemaking image.

When the security mode of the main unit is set and an operator who has made a plate-making image designated for confidentiality is to display a plate-making image with the confidentiality designation for confirmation, etc., cancel the confidentiality designation setting. It can be performed.
The control device 20 can call up and display a plate-making image having a security-preservation designation from the plate-making image storage unit by receiving an input for canceling the security-preservation designation setting.
In this case, the control device 20 forcibly resets the confidentiality designation after a lapse of a certain time after receiving the input to cancel the confidentiality designation setting.

Further, in the stencil printing apparatus of the present invention, during double-sided printing, the storage device 121 of the plate cylinder unit individually stores the presence / absence of confidentiality designation on each side, and the plate making on the side where the confidentiality designation is not specified by the control means 20. Only images can be displayed.
For example, when printing educational materials such as exam questions at an educational institution, when you make a question paper on one side and make a model answer on the other side, the question paper is not designated as confidentiality and anyone can check it It is possible to specify the confidentiality of the answer surface and prohibit the display of the image by prohibiting the display of the image.
As described above, according to the stencil printing apparatus of the present invention, in printing an image including confidential information, it is possible to ensure high information security while taking advantage of the preview display of the platemaking image.

DESCRIPTION OF SYMBOLS 1 Stencil printing apparatus 2 Printing part 3 Plate making part (plate making means)
5 Plate removal section (plate removal means)
7 Image reading unit (image reading means)
11 Machine body 12 Plate cylinder (drum)
DESCRIPTION OF SYMBOLS 30 Operation part 120 Plate cylinder unit 121 Memory | storage device 100 of plate cylinder unit 100 Control means

JP 2010-143230 A JP 2000-343803 A

Claims (5)

Removable plate cylinder including image reading means for reading an image, plate making means for making a stencil sheet on the basis of image data read by the image reading means, and a plate cylinder on which the stencil sheet on which the plate making has been made is wound In a stencil printing apparatus comprising at least a unit, a stencil discharging unit for discharging the stencil sheet from the plate cylinder, and a control unit, and performing a stencil making process comprising an image reading operation, a stencil making operation, a winding operation, and a stencil discharging operation,
Plate-making image storage means for storing a plate-making image for plate-making the stencil sheet;
Based on the necessity of confidentiality of the prepress image, a means for inputting the confidentiality designation setting for each prepress image,
Plate-making image display means for displaying the plate-making image stored in the plate-making image storage means on the operation unit;
A plate cylinder unit storage device for storing a platemaking image number assigned to a platemaking image of a stencil sheet held by the plate cylinder unit;
When the control means is requested to display a plate-making image mounted on the plate cylinder, it confirms whether or not the corresponding plate-making image has a confidentiality designation from the plate-making image number, and only when there is no confidentiality designation. A stencil printing apparatus that performs control for calling and displaying a corresponding plate-making image from the plate-making image storage means. Removable plate cylinder comprising image reading means for reading an image, plate making means for making a stencil sheet on the basis of image data read by the image reading means, and a plate cylinder on which the stencil sheet having been subjected to plate making is wound In a stencil printing apparatus comprising at least a unit, a stencil discharging unit for discharging the stencil sheet from the plate cylinder, and a control unit, and performing a stencil making process comprising an image reading operation, a stencil making operation, a winding operation, and a stencil discharging operation,
Plate-making image storage means for storing a plate-making image for plate-making the stencil sheet;
Based on the necessity of confidentiality of the prepress image, a means for inputting the confidentiality designation setting for each prepress image,
Plate-making image display means for displaying the plate-making image stored in the plate-making image storage means on the operation unit;
A plate cylinder unit storage device that stores the plate making image number of the plate making image of the stencil sheet held by the plate cylinder unit and the presence or absence of confidentiality designation;
When the control means requests the display of the plate making image mounted on the plate cylinder, the corresponding plate making image is called up from the plate making image storage means only when the plate making image number has no designation of confidentiality. A stencil printing apparatus characterized by performing display control.   When the control unit has a confidentiality designation in the platemaking image requested to be displayed, the control unit receives an input for canceling the setting of the confidentiality designation, thereby obtaining a platemaking image corresponding to the platemaking image number from the platemaking image storage unit. The stencil printing apparatus according to claim 1, wherein the stencil printing apparatus is called and displayed.   4. The stencil printing apparatus according to claim 3, wherein the control unit forcibly resets the confidentiality designation after a lapse of a predetermined time after receiving an input to cancel the confidentiality designation setting.   When performing duplex printing, the storage device of the plate cylinder unit individually stores the presence / absence of confidentiality designation on each side, and displays only the plate-making image on the side without confidentiality designation by the control means. The stencil printing apparatus according to any one of claims 1 to 4.

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