JP2006137086A - Stencil printing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent defective printed matter or the like due to mistaken sensing of a copy size, or the like, arising in serial platemaking and printing for which an automatic copy reading device (hereinafter called ADF) is used, in stencil printing equipment provided with the ADF. <P>SOLUTION: In the serial platemaking and printing for which the ADF 108 is used, the platemaking is conducted with the data read by copy size sensing means (sensors W1, W2, L1, L2) used as data on a copy size, and the platemaking and printing are performed without changing the data on the copy size, even when the data on the copy size read thereafter differs from that already read. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a stencil printing apparatus.

  In a stencil printing apparatus equipped with an automatic document feeder (hereinafter referred to as ADF (auto document feeder)) capable of transporting a plurality of documents to a reading unit, a plurality of documents are placed on the ADF and the paper size is set. In the case of making the plates together, at the start of continuous plate making, the document size is read every time, the position of the plate making is determined, and the paper that matches the document size is selected.

  For continuous stencil printing with the same document size, the same paper size and the same document size are used for stencil printing devices with ADF, which are based on the premise that originals of different sizes will not be mixed when setting the document on the ADF. For this reason, there is no problem even if the prepress printing is repeated. However, when a document size is detected by the ADF, a hand or another document is accidentally placed on the sensor that is the document size detection means in the ADF document size detection unit. Is erroneously detected as a document whose document size is longer than the actual size, resulting in plate making in which the paper and the document position do not match.

  When printing with this type of plate-making, printing is not possible because different sizes of paper are mixed in multiple papers that are printed, and the printed material is contrary to the user's intentions. When a product is inspected, an error is noticed and printing is made again. Master and paper are wasted, and printing time for remaking is more wasted than that.

  Unusable printed matter printed by plate making whose paper and document positions do not match is not found unless it is inspected after printing. For example, if the sorter with staples is selected as an option, the printed matter is stapled after sorting. For this reason, restoration work such as re-engraving printing is difficult, and there are cases in which re-making does not work because of stapling, and plate-making printing can only be performed from the beginning.

  On the other hand, the setting direction of the original and the paper is determined based on the detection information of the original size detecting means and the paper size detecting means, and the output order of the image data signal from the image memory is controlled when the setting directions of the original and the paper are different. A stencil printing apparatus is known that rotates a plate-making image formed on a master by 90 ° and controls the plate-making means so that the master is cut by a length corresponding to the set size of the paper (for example, Patent Document 1). reference).

  However, Patent Document 1 discloses a measure for preventing the above-described problem when a document size detection in the ADF is erroneously detected when a plurality of documents are set in the ADF and the document is automatically read and continuously made. Not touched.

Japanese Patent Laid-Open No. 11-240239

  The present invention prevents the loss of paper, master, working time, etc. associated with reprint printing to replace defective printed matter caused by erroneous detection of the document size that occurs during continuous plate printing using ADF. It is an object of the present invention to provide a stencil printing apparatus that can be used.

The present invention has the following configuration in order to achieve the above object.
In the stencil printing apparatus having an ADF that sequentially conveys a plurality of documents to a reading unit, when continuous plate-making printing is started with a plurality of documents placed on the ADF, The original size is read by the original size detecting means, the read data is made as original size data, and the original size data is not changed even if the original original size reading data is different from the original original size data. Control means for printing was provided.
According to a second aspect of the present invention, there is provided an ADF that can sequentially transport a plurality of documents to a reading unit, and when a plurality of documents are placed on the ADF and continuous plate-making printing is started, document size detection is performed. A stencil printing apparatus for reading a document size by means, and making and printing the read data as document size data, wherein the document size is detected when a document is set on the ADF and continuous plate-making printing is performed. Even when a sensor that is impossible is turned on, a control unit that performs plate making without changing the document size data is provided.
According to a third aspect of the present invention, a document memory for storing document data is provided, and all the documents are read at the start of continuous plate making with a plurality of documents placed on the ADF, and the data is stored in the document memory. When the plate making is started, the data stored in the original memory is read out and made with a master plate making length that matches the original size, and is made with the master plate making length that matches the original size. In some cases, there is provided control means for replacing the remaining data in the original memory with the same original size as that of the first original, reading out the original data one by one from the original memory, and performing plate-making printing. Here, when a document is set on the ADF and continuous plate-making printing is performed, if the document size is changed while the entire document is read and the data is placed in the document memory, the document reading is stopped and the “document And the paper size does not match. ”(Claim 4).
According to a fifth aspect of the present invention, in the stencil printing apparatus provided with the ADF capable of sequentially transporting a plurality of documents to the reading unit, the stencil printing machine includes a document memory for storing document data, and the plurality of documents is the above-described document. All documents are read at the start of continuous plate making in the state of being placed on the ADF, and at the time of reading, the maximum document size is stored in the document memory regardless of the document size, and when the plate making starts, the maximum size document data is stored. There is provided control means for sequentially reading out the document data for each document at the first document size from the top of the sheet and performing plate-making printing.
Further, in the stencil printing apparatus provided with ADF that can sequentially convey a plurality of originals to the reading unit, the multi-stage paper supply device is provided as the paper supply device, and the original size is read by the original size detecting means, and the read data Is made as document size data, and the paper tray of the multi-stage paper feeder is selected and continuous plate-making printing is performed. When the document size changes during the process, the paper tray constituting the multi-stage paper feeder is selected. Control means that does not change are provided.

  According to the present invention, it is possible to prevent the loss of paper, master, working time, etc. associated with reprint printing due to erroneous detection of the document size that occurs during continuous plate printing using ADF.

Embodiments of the present invention will be described below.
(Stencil printing machine)
A stencil printing apparatus suitable for carrying out the present invention will be described with reference to the drawings.
A schematic configuration of the stencil printing apparatus 1 will be described. As shown in FIG. 1, the stencil printing apparatus 1 mainly includes a printing unit 2, a plate making unit 3, a paper feeding unit 4, a plate discharging unit 5, a paper discharging unit 6, a document reading unit 7, an ADF 108, and the like. The stencil printing apparatus 1 in this example has a configuration in which the maximum corresponding size is 297 mm × 420 mm (297 mm × 432 mm in the inch size).

The printing unit 2 disposed in the center of the casing 18 mainly includes a plate cylinder 8, an ink supply unit 9, a press roller 10 as a pressing member, and the like.
The plate cylinder 8 includes a pair of flanges (two circular plates facing each other in a direction penetrating the paper surface of FIG. 1) rotatably supported by a support shaft 11 that also serves as an ink supply pipe, and the flanges. It is mainly composed of a porous support plate 8a wound around the outer peripheral surface, and is driven to rotate in the direction of the arrow in FIG. 1 by a driving means (not shown). The support shaft 11 is supported at the tip by a side plate of the housing 18, and a plurality of small holes for supplying ink to the ink supply means 9 are formed on the surface of the support shaft 11. The pair of flanges are attached to the support shaft 11 via a bearing (not shown).

  The porous support plate 8a is formed of a stainless steel thin plate or the like, and has an opening portion and a non-opening portion. A large number of openings are formed in the opening portion, and a plate is formed in the non-opening portion. A stage portion 14 having a plane parallel to one generatrix of the body 8 is disposed. An openable / closable clamper 15 is disposed on the upper surface of the stage unit 14. Further, on the outside of the porous support plate 8a, about 1 to 3 layers of mesh screens (not shown) woven with polyester or stainless fine wires are wound.

  An ink supply means 9 mainly composed of an ink roller 16, a doctor roller 17 and the like is disposed inside the plate cylinder 8 and below the support shaft 11. The ink roller 16 is rotatably supported by a pair of side plates (not shown) fixed on the support shaft 11, and a rotational force from a driving means (not shown) is transmitted by a rotational force transmission means such as a gear or a belt. It rotates in the same direction as the barrel 8. The doctor roller 17 is rotatably supported between the side plates at a position where a slight gap is formed between the outer peripheral surface of the doctor roller and the outer peripheral surface of the ink roller 16, and is driven to rotate in a direction opposite to the ink roller 16. The In the vicinity of the outer peripheral surfaces of the ink roller 16 and the doctor roller 17, the ink supplied from the support shaft 11 forms a wedge-shaped ink reservoir 17a.

  A press roller 10 is disposed below the plate cylinder 8. The press roller 10 is rotatably supported at both ends of a support shaft by a pair of press roller arms, and the press roller 10 abuts on the plate cylinder and is separated when each press roller arm swings. The timing and time of the swing of each press roller arm are determined by a solenoid 45 and a stepping motor 52 controlled by the control means 26 also shown in FIG. That is, the control means 26 controls the contact and separation time with respect to the plate cylinder 8 and the timing.

  As shown in FIG. 1, a plate making unit 3 serving as a plate making means is disposed on the upper right side of the printing unit 2. The plate making section 3 is mainly composed of a master storage means 55, a platen roller 56, a thermal head 57, a cutting means 58, a master transport roller pair 59, 60, and the like.

  The master storage means 55 rotatably and detachably supports a core portion 62a of a master roll 62 obtained by winding a master 61 in which a thermoplastic resin film and a porous support are bonded together in a roll shape.

  A platen roller 56 and a thermal head 57 are disposed downstream of the master storage means 55 in the master transport direction. The platen roller 56 is rotatably supported on a side plate (not shown) of the housing 18 and is driven to rotate by a stepping motor 63. The operation of the stepping motor 63 is controlled by the control means 26 shown in FIG.

  In FIG. 1, a thermal head 57 having a large number of heat generating elements is attached to a side plate (not shown) of the casing 18, and is urged by an urging means (not shown) and pressed against a platen roller 56. The thermal head 57 selectively heats the heating element while making contact with the thermoplastic resin film surface of the master 61, and performs hot melt perforation plate-making on the master 61. The operation of the thermal head 57 is controlled by the control means 26 shown in FIG.

  A cutting means 58 is disposed downstream of the platen roller 56 and the thermal head 57 in the master conveyance direction. The cutting means 58 composed of the fixed blade 58a and the movable blade 58b has a known configuration in which the movable blade 58b rotates with respect to the fixed blade 58a fixed to the side plate of the housing 18.

  Master transport roller pairs 59 and 60 and guide plates 64 and 65 are disposed downstream of the cutting means 58 in the master transport direction. The master transport roller pair 59, 60 includes driving rollers 59a, 60a that are driven to rotate synchronously by a driving unit (not shown), and driven rollers 59b, 60b that are pressed against the driving rollers 59a, 60a by a biasing unit (not shown). It is composed of

  A guide plate 64 is disposed between each of the master transport roller pairs 59 and 60, and a guide plate 65 is disposed downstream of the master transport roller pair 60 in the master transport direction. Each guide plate 64, 65 is fixed to the side plate of the housing 18, guides the master 61 transported by each master transport roller pair 59, 60, and guides the tip of the master 61 to the outer peripheral surface of the plate cylinder 8. To do.

  A sheet feeding unit 4 is disposed below the plate making unit 3. The paper feed unit 4 mainly includes a paper feed tray 66, a paper feed roller 67, a separation roller 68, a separation roller 69, a registration roller pair 70, and the like.

  A paper feed tray 66 on which a large number of sheets P are stacked is supported by the casing 18 so as to be movable up and down, and is moved up and down by a lifting means (not shown). The paper feed tray 66 is provided with a reflection type sensor 71a, 71b, 71c, 71d, etc. constituting a paper size detecting means, and a pair of side guides 72 for guiding the paper P. The sensors 71a, 71b, 71c, and 71d detect the length in the paper transport direction, and in addition to this, a reflection type sensor that detects the length in the direction orthogonal to the paper transport direction is provided. These sensors constitute a paper size detecting means 150 for inputting the paper size to the control means 26 in FIG.

  In FIG. 2, the output signal from the paper size detection unit 150 is output to the control unit 26, and the control unit 26 determines the size and setting direction of the paper P based on the output signal from the paper size detection unit 150. In FIG. 1, the side guide 72 has a known configuration that is movable in the paper width direction (a direction orthogonal to the conveyance direction of the paper P).

  Above the sheet feed tray 66, a sheet feed roller 67, a separation roller 68, and a separation roller 69 each having a surface formed of a member having a high friction resistance are disposed. The paper feed roller 67 and the separation roller 68 are pressed against the paper P on the paper feed tray 66 at a predetermined pressure, and are driven by a common stepping motor 73 via a driving force transmission means (not shown) such as a gear or a belt. It is rotationally driven in the direction of the arrow. The separation roller 69 is in pressure contact with the separation roller 68 at a predetermined pressure, and is disposed so as to be intermittently rotatable in the same direction as the separation roller 68. The operation of the stepping motor 73 is controlled by the control means 26.

  A registration roller pair 70 is disposed on the downstream side of the separation roller 68 and the separation roller 69 in the sheet conveyance direction. The registration roller pair 70 including the driving roller 70a and the driven roller 70b transmits a rotational driving force from a driving unit (not shown) by a driving force transmission unit (not shown) such as a gear or a cam so that the driving roller 70a has a predetermined timing. And the paper P is fed toward the printing unit 2 by the driven roller 70b that is pressed against the driving roller 70a.

  A plate discharging unit 5 is disposed on the upper left side of the printing unit 2. The plate discharging unit 5 is mainly composed of 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 includes a driving roller 78, a driven roller 79, and an endless belt 80. When the driving roller 78 is driven to rotate in a clockwise direction in FIG. Move in the direction.

  The lower plate removing member 75 includes a driving roller 81, a driven roller 82, and an endless belt 83. The driving force of a driving unit (not shown) that drives the driving roller 78 to rotate is transmitted by a driving force transmission unit such as a gear or a belt (not shown). By being transmitted, the drive roller 81 is rotationally driven in the counterclockwise direction in FIG. 1, whereby the endless belt 83 moves in the direction of the arrow in the figure. The lower plate removal member 75 is movably provided by a moving means (not shown), and is selectively positioned at a position shown in FIG. 1 and a position where the outer peripheral surface of the driving roller 81 contacts the outer peripheral surface of the plate cylinder 8. The

  A plate removal box 76 for storing a used master therein is detachably attached to the housing 18. 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 a lifting means (not shown) so as to be movable up and down. Move up and down between the dotted lines.

  A paper discharge unit 6 is disposed below the plate discharge unit 5. The paper discharge unit 6 mainly includes a peeling claw 84, a paper discharge conveying member 85, a paper discharge tray 86, and the like. The peeling claw 84 for peeling the printed paper P from the outer peripheral surface of the plate cylinder 8 is swingably supported on the side plate of the housing 18 by a support shaft 84a, and the tip thereof is swung by a swinging means (not shown). The plate cylinder 8 is selectively swung between a position close to the outer peripheral surface of the plate cylinder 8 and a position where the tip of the plate cylinder 8 does not interfere with an obstacle such as a clamper 15 that is moved by the rotation of the plate cylinder 8.

  The paper discharge conveying member 85 mainly includes a driving roller 87, a driven roller 88, an endless belt 89, a suction fan 90, and the like. The drive roller 87 is rotatably supported by a unit side plate (not shown) and is driven to rotate by a drive means (not shown). The driven roller 88 is also rotatably supported on the same side plate, and a plurality of endless belts 89 having a plurality of openings are spanned between the driving roller 87 and the driven roller 88.

  A suction fan 90 is disposed below the driving roller 87, the driven roller 88 and the endless belt 89. The paper discharge conveying member 85 sucks the paper P onto the endless belt 89 by the suction force of the suction fan 90, and transports the paper P in the direction of the arrow by the rotation of the driving roller 87.

  A paper discharge tray 86 on which printed paper P conveyed by the paper discharge conveyance member 85 is stacked has a pair of side fences 91 and end fences 92 that are movable in the paper width direction.

  A document reading unit 7 is disposed on the top of the housing 18. The document reading unit 7 guides a document tray 94 on which a document 93 is stacked, a contact glass 95 on which the document 93 is placed, a document transport roller pair 96 and a document transport roller 97 that transport the document 93, and the document 93 that is transported. The guide plates 98 and 99, a plurality of document conveying belts 100 that convey the document 93 along the contact glass 95, the document tray 101 on which the scanned document 93 is stacked, and the above members other than the contact glass 95 are supported, and the contact glass. 95, a cover 102 provided so as to be able to come in contact with and away from the camera 95, reflection mirrors 103 and 104 and a fluorescent lamp 105 for scanning and reading a document image, a lens 106 for focusing the scanned image, and processing the focused image It is mainly composed of an image sensor 107 such as a CCD.

  In the above configuration, the ADF 108 is configured by the document receiving tray 94, the document transport roller pair 96, the document transport roller 97, the guide plates 98 and 99, the document transport belt 100, and the document tray 101.

  Further, the document reading means 132 is configured by the contact glass 95, the reflecting mirrors 103 and 104, the fluorescent lamp 105, the lens 106, and the image sensor 107, and a document to be transported between the plurality of document transport belts 100. A sensor 109 is provided as a detecting means for detecting the presence or absence.

  A document size detecting unit is configured on the document receiving tray 94. Although omitted in FIG. 1, a pair of side fences 162 (the other facing is not shown) as shown in FIG. These side fences 162 and 162 are opposed to each other in a direction orthogonal to the document conveying direction Q. One side fence 162 is integrally provided with a slit plate 163, and the other side fence is also provided with a plate similar to the slit plate 163. A known rack and pinion combination mechanism is provided between these plates. The side fences 162 and 162 can be slid toward or away from each other in the direction perpendicular to the document transport direction Q by being guided by a guide (not shown) by grasping and operating the handle 164. In other words, the document can be adjusted to the center position on the document receiving tray 94 on the basis of the so-called center reference by moving until the side fences are aligned with both sides of the document.

  As shown in FIG. 3, a plurality of plate pieces 163a are arranged below the slit plate 163 in an upright manner along the sliding direction of the side fence, and the slits 165 defined between the plate pieces 163a. Is forming. On the extension of each row, light transmitting sensors W1 and W2 are fixed below the slit plate 163, for example, on a document receiving tray 94. The positions and intervals of the slits 165 in each row are different, and, for example, when the plate piece 163a blocks the light transmitted and received by the sensor unit by matching the plate piece 163a with the sensor W1, the plate piece 163a The detection output of the sensor W1 when the slit 165 matches the sensor W1 and the plate piece 163a does not block the light transmitted and received by the sensor unit is 0.

  By doing so, the size of the document can be detected from the combination of the detection outputs of the sensors W1 and W2 when the side fence 162 is placed on both sides of the document 93 placed on the document receiving tray 94. At the same time, the originals 93 can be aligned on the basis of the center.

  Further, the document receiving stage 94 is provided with sensors L1 and L2 which are reflective sensors similar to the sensors 71a to 71d at different positions on the upstream side in the document transport direction Q, and the document 93 on the document receiving table 94 is provided. The detection output from the sensors L1 and L2 changes depending on the presence or absence of the reflection amount from the sensor. For example, assuming that the output signal at the time of document detection is 1 and the output signal at the time of non-detection is 0 for the sensors L1 and L2, Thus, the length of the document 93 in the document transport direction Q can be detected.

  In FIG. 4 when the document receiving tray 94 is viewed from above, the symbol OO indicates the nip line of the document transport roller pair 96 shown in FIG. The side fence is not shown. The original is set in the direction perpendicular to the conveyance direction Q by the side guides 162 and 162 described with reference to FIG. Further, since the document receiving tray 94 is inclined with a gradient descending toward the nip line OO, the left end of the document is aligned with the nip portion (or the document conveying roller pair 96).

  For example, it is assumed that the document 93 is aligned on the document tray 94 as shown in FIG. At this time, if the output of the sensor W1 is 1, the output of the sensor W2 is 0, the output of the sensor L1 is 1, and the output of the sensor L2 is 0, the standard value A4 is obtained from the combination of these outputs according to the table of FIG. Can be determined as size. These sensors W 1, W 2, L 1, L 2, etc. are referred to herein as “type 1 document size detection means” and are indicated by document size detection means 152 in FIG.

  Although not shown, the document reading unit 7 is provided with another document size detecting means. This is the same configuration as the paper size detection means, and consists of a plurality of reflective sensors that detect the length of the document on the contact glass 95 one by one on the contact glass 95. These reflective sensors also constitute document size detection means, referred to herein as “type 2 document size detection means”. In FIG. 2, the document size detection means 152 is used together with “type 1 document size detection means”. Show.

  These output signals from the document size detection unit 152 are output to the control unit 26, and the control unit 26 determines the size and set direction of the document based on the output signal from the document size detection unit 152.

  A sensor 131 that detects the document 93 remaining on the document tray 94 is disposed below the document tray 94. The sensor 131 outputs a signal to the control means 26 when the document 93 on the document tray 94 runs out.

  As shown in FIG. 2, the control unit 26 includes a CPU 112 as a microcomputer, a ROM 114 and a RAM 116, an image processing unit 118, and a document memory 120. As shown in FIG. 7, the operation panel 110 has a display unit 122 that warns the operator when the document and the paper size do not match, and a warning setting unit that can arbitrarily set whether or not to issue a warning. A warning setting button 124, a plate making start key 126, and the like are provided.

  When the plate making start key 126 is pressed in the stencil printing apparatus 1, the control unit 26 temporarily stores the image data signal from the document reading unit 7 in the document memory 120 via the image processing unit 118, and the image from the document memory 120. The data signal extraction order is set and output to the thermal head 57 via the image processing means 118. As a result, a plate-making image is formed on the master.

  As will be described below, the control means 26 makes a plate based on the document size data, and controls the stepping motor 63 and the cutting means 58 to cut the length of the master. The master thus made is wound around the plate cylinder 8, and printing is started by pressing a print start key (not shown).

(Control example)
In the stencil printing apparatus, when a plurality of originals are conveyed by the ADF 108 and continuously made, if the original size changes during the process, the paper and the plate making position do not match. Therefore, when setting an original on the ADF 108, the user is required to use originals having different sizes without mixing them. However, if there is an erroneous detection of the original size, the size of the original is different from that of the original. Plate making is performed, and printing that does not match the original size and paper size is performed and printing is performed again for printing that cannot be used, resulting in waste of master, paper, and reprint printing. Therefore, in the present invention, no waste is generated by the control described below.

(Control example 1)
In the stencil printing apparatus 1 described with reference to FIG. 1, there is an ADF 108 for conveying a plurality of documents to the document reading means 132. The stencil printing apparatus is an apparatus for printing a large number of sheets with one document. In the stencil printing apparatus 1, a plurality of documents are set by using the ADF 108, and printing is continuously performed. . Normally, only one type of paper set in the paper feed tray 66 can be set because there is only one paper feed stand, so that a plurality of originals are subjected to plate-making printing with one type of paper.

  When a plurality of documents are placed on the document receiving tray 94 of the ADF 108 and continuous plate-making is started, the document size is detected by, for example, “type 1 document size detection unit” before the document is conveyed to the document reading unit 132. .

  As described above, the “type 1 document size detecting means” detects the document size by the document width sensors (sensors W1, W2) and the document length sensors (sensors L1, L2) attached to the ADF 108. It has become. The document size is determined based on the table in FIG. 6 according to the detection output combination of the document width sensors (sensors W1, W2) and the document length sensors (sensors L1, L2). It is converted into document data, that is, document width data and document length data.

  A case where the document size and the paper size do not match will be described.

  When an original document is set on the ADF and continuous plate-making printing is performed, if a document that does not match the paper size is set and the plate-making start key 126 is pressed, the control means 26 receives a signal from the paper size detection means 150 as shown in FIG. Since it is already determined that the document size is different from the paper size due to the signal input, as shown in FIG. Has a function to prevent.

  However, if you want to perform continuous prepress printing with multiple documents set in the ADF, if the size of the multiple documents set in the ADF 109 is not the same, the size of the first document matches the paper size. If it was done, plate making is executed. If the document size is different during plate-making printing, the paper and document size will not match, so a warning “The document and paper size do not match” will be displayed, and continuous plate-making printing can be performed. It will happen that it will disappear.

  Here, a case where the document size changes when the document size is read will be described. When a document is set on the ADF 109 and continuous plate-making printing is performed, the document size changes when the document size is continuously read. The document size detection unit, for example, the sensor L1 or the sensor L2, is used when the document size is detected by the ADF 109. If you accidentally put your hand or another manuscript on the top. In this case, since the outputs of the sensors L1 and L2 change in the table shown in FIG. 6, the document size based on the sensor output changes from the actual document size.

  For example, if the size of the original is determined according to the paper in the case of a short document size, but the length detection of the document size is detected incorrectly, the document is detected as a long document. Therefore, since the document size data is converted into standard size data depending on the combination of the ADF document width sensor and the document length sensor, the document length data is longer than the document. Thus, the paper length data does not match.

  Therefore, when continuous plate-making printing is started with a plurality of originals placed on the ADF 108, the original size is read by the original size detecting means, and the read data is made as original size data. For example, a control unit 26 for performing plate-making printing without changing the original size data even when the read data is different from the original size data by placing a hand or another original on the sensor, for example.

  Here, the continuous plate-making printing means that plate-making is performed on one original document sent by the ADF 108, and after the set number of prints are finished, the second original document is sent by the ADF 108, and this original document is printed. This means a cycle of making a plate and finishing printing a set number of sheets.

  In this example, in the stencil printing apparatus, since the document size data changes during the process of the plate making, the plate and the original position are not matched, so the plate making is printed and printing is performed again for printing that cannot be used. As a result, it is possible to prevent the master and paper from being wasted and the re-making time from being wasted.

  Furthermore, because the plate and the original position do not match, a printed matter that cannot be used after printing cannot be found unless it is inspected after printing. Therefore, in the case of a sorter with staples as an option, stapling is performed after sorting. For this reason, there is a case where the work in the case of a mistake is difficult, and because the stapling is performed, the redoing is not effective and the plate making printing can only be performed from the beginning. In this example, these wastes can be prevented.

(Control example 2)
A case will be described in which a sensor that cannot be detected as document size detection is turned on.
The document size is determined based on the table shown in FIG. 6 according to the combination of the document width sensors (sensors W1, W2) and the document length sensors (sensors L1, L2) of the ADF 108. Is converted into document size data, that is, document width data and document length data.

  Here, even when a sensor that is impossible for document size detection is turned on, the document size data is converted into data of a standard size by a combination of the ADF document width sensor and document length sensor. For example, when the longer sensor L2 of the document length data sensors L1 and L2 is turned on and the output signal is 1, and the shorter sensor L1 is turned off and the output signal is 0, the standard size is not obtained. Since there was no data combination, it was handled as an indeterminate type, and the maximum paper size was set as shown in FIG. Therefore, since it is converted into the maximum document size data of the standard size, the data may be larger in width and length than the document, and may not match the paper data.

  Therefore, when the original is set on the ADF 108 and continuous plate-making printing is performed, even when a sensor that cannot be detected as a document size is turned on, the control unit 26 performs plate-making without changing the document size data. It was equipped.

  Here, the continuous prepress printing means that the ADF 108 continuously sends an original to the original reading means 132, reads the original size and original data, stores the data in the original memory, and then reads the first original data. It may be a cycle in which plate making is completed, printing of a set number of sheets is completed, second original data is read out, plate making is completed, and printing of the set number of sheets is completed. Alternatively, for a single document sent by the ADF 108 Alternatively, after making a plate and finishing printing for a set number of sheets, a second document may be sent by the ADF 108, making a plate for this document, and printing for a set number of pages may be finished.

  In this example, when a document is set on the ADF 108 and continuous plate-making printing is performed, when a document size is detected and a sensor that cannot be detected as the size of the document is turned on, it is a false detection. Therefore, the document size data was not changed. As a result, if a plate making that fits the maximum paper size paper is made, the plate will be printed with a plate that does not match the original position, resulting in a printed material that cannot be used with a mixture of large paper sizes. Thus, it is possible to prevent the master and paper from being wasted and the re-making time from being wasted.

(Control example 3)
The stencil printing apparatus 1 has a document memory 120 that stores data of a read document when the document is read by a document reading unit 132 (so-called scanner). The document memory 120 is, for example, a semiconductor memory or a hard disk (HDD). Recently, the document memory 120 is also used in a printing machine for image memory of a printer and editing (circuit and aggregation) of image data read by a scanner. .

  When the ADF 108 capable of transferring a plurality of documents to the document reading unit 132 is installed when the document memory 120 is provided, when the plurality of documents are set in the ADF 108 and continuous plate-making printing is performed, At the start of plate making, all the originals are continuously read by the “type 2 document size detecting means”, the data is stored in the document memory 120, and stored in the document memory 120 at the start of plate making. The remaining data is sequentially entered into the document memory 120 so that when the document data is called each time and the master is made with the master plate length matching the document size, the document is made with the same document size as the first document. At the time of making a plate, the original data for each original is read from all previously stored original memories and prepress-printed.

  Here, the continuous prepress printing means that the ADF 108 continuously sends an original to the original reading means 132, reads the original size and original data, stores the data in the original memory, and then reads the first original data. This means a cycle in which plate making is performed, printing of a set number of sheets is completed, second original data is read out, plate making is performed, and printing of the set number of sheets is completed.

  Based on the premise that all original sizes should be set in the ADF, this causes the original size to change in the middle due to sensor misdetection when reading the original size with "Type 2 original size detection means". If the sensor is turned on or a sensor that is impossible for detecting the document size is turned on, the document size data will not be changed contrary to the fact.

  In this example, the stencil printing apparatus 1 has a document memory 120 for storing document data, is equipped with an ADF 108 that can transport a plurality of documents to a reading unit, and a plurality of documents are placed on the ADF 108. When the continuous plate making starts, all the originals are read, and the data is stored in the original memory 120. When starting the plate making, when the plate is made with the master plate making length corresponding to the original size, the first original Remaining data with the same original size as the size is stored in the original memory 120, and at the time of plate making, the original data is read out from the memory 120 one by one, and the plate is printed so that the paper and the original position do not match. Because of the unusable printing, the plate-making printing is performed again, and the master and paper are wasted. It is possible to prevent wasted.

(Control example 4)
In the control example 3, when continuous plate-making printing is performed by setting a plurality of originals on the ADF 108, when reading all the originals at the start of continuous plate-making, an operation of reading the originals and putting the data into the original memory 120 is performed. When the size of the first document is the same as the size of the document that has just been read and is the same, it is stored in the document memory 120 sequentially. A warning “paper size does not fit” is displayed on the operation panel 110 as shown in FIG.

  At the time of plate making after completion of reading of the original, original data for each original is read from all previously stored original memories and prepress-printed.

  As a result, when the original size is read, the original size may change due to the user mixing different-size originals, or a sensor that is impossible for original size detection is turned on. In other words, it is possible to notify the user of an error in reading a document at an early time (time) including a case where the document size has actually changed. As a result, the document reading can be started again, so that the recovery operation time from the time of finding a mistake can be made faster than when a warning is issued after all the documents are read.

  As described above, in this example, when the stencil printing apparatus 1 sets a document on the ADF 108 and performs continuous plate-making printing, when the document size is changed while the entire document is read and the data is stored in the document memory 120. In this case, the paper and original size do not match. It is possible to prevent the master and paper from being wasted and the re-making time from being wasted earlier than that because the plate-making printing is performed again for the unusable printing.

(Control example 5)
The stencil printing apparatus 1 has a document memory 120 that stores data of a read document when the document is read by the document reading unit 132.

  When the document memory 120 is provided, the ADF 108 capable of transporting a plurality of documents to the document reading unit 132 is installed, and when a plurality of documents are set on the ADF 108 and continuous plate-making printing is performed, When all the originals are read, the operation of placing them in the original memory with the maximum original data size regardless of the original size is performed when all the originals are read.

  Here, the continuous prepress printing means that the ADF 108 continuously sends an original to the original reading means 132, reads the original size and original data, stores the data in the original memory, and then reads the first original data. This means a cycle in which plate making is performed, printing of a set number of sheets is completed, second original data is read out, plate making is performed, and printing of the set number of sheets is completed.

  In this example, after reading the document size and document data, at the time of making the plate, the first document size from the top of the document data of the maximum size in the stored data is selected from all the document data stored in the document memory 120. Control means 26 for sequentially reading out the original data for each original and making plate-making printing is provided.

  As a result, when the document size is changed halfway when reading the document size described above, or when a sensor that is impossible for document size detection is turned on, the printout is printed on the maximum size paper. It will be a complete set.

  In this example, the stencil printing apparatus has a document memory 120 for storing document data, is equipped with an ADF 108 that can transport a plurality of documents to the reading unit, and a plurality of documents are placed on the ADF 108. Sometimes when all the originals are read at the start of continuous plate making, the data is stored in the original memory 120, and when starting plate making, the first original document size from the beginning of the maximum size original data in the stored data is sequentially Since the original data is read out for each original and is subjected to prepress printing, the preprint is printed because the preprint position is not aligned with the original, and the preprint is printed again for printing that cannot be used. Therefore, it is possible to prevent the time for re-making from being wasted.

(Control example 6)
In the stencil printing apparatus 1, the document size detection unit 152 detects by the plurality of document width sensors and the plurality of document length sensors in the “type 1 document size detection unit” or “type 2 document size detection unit”. Yes. By combining the detection output of the document width sensor and the document length sensor, a fixed document size is estimated and used as document size data.

  Further, in addition to the single sheet feeding unit 4 shown in FIG. 1 as the sheet feeding device, each component member has the same sheet feeding unit 4-1 and 4-2 as the sheet feeding unit 4 as shown in FIG. A multi-stage sheet feeding device (hereinafter referred to as a bank) is included.

  In this case, consider a case where a document is set on the ADF 108 and continuous plate-making printing is performed. Here, the continuous prepress printing means that the ADF 108 continuously sends an original to the original reading means 132, reads the original size and original data, stores the data in the original memory, and then reads the first original data. It may be a cycle in which plate making is completed, printing of a set number of sheets is completed, second original data is read out, plate making is completed, and printing of the set number of sheets is completed. Alternatively, for a single document sent by the ADF 108 Alternatively, after making a plate and finishing printing for a set number of sheets, a second document may be sent by the ADF 108, making a plate for this document, and printing for a set number of pages may be finished.

  In any case, if the original size read by the original size detecting unit 152 is changed halfway, the paper and the original size will not match, and the same paper size as the original size data will be selected from the paper sizes set in the bank. The paper tray for data is selected.

  When printing is performed in this way, when the document size data changes due to erroneous detection of the document size of the ADF 108 or by mistakenly placing a hand or another document on the document size portion of the ADF 108, the document is set in the ADF 108. Since continuous plate-making printing is performed on paper of a size different from the original size, unnecessary printing is performed, and plate-making printing is performed again for printing that cannot be used. Is wasted, and the time for re-making is more wasted than that. Since the paper and the original position do not match, the printed material that cannot be used after printing cannot be found unless inspection is performed after printing. Therefore, in the case of a sorter with staples, it is stapled after sorting. For this reason, there is a case where the repair work in the case of a mistake is difficult, and because stapling is performed, the redoing does not work and there is no choice but to perform plate-making printing from the beginning.

  In this example, when a multi-stage paper feeder as shown in FIG. 8 is installed as the paper feeder, when the original is set on the ADF 108 shown in FIG. By not changing the paper tray selection when the size changes, printing with one size paper is performed, and by changing the paper size based on false detection, the original position does not match It is possible to prevent the master and paper from being wasted and the time for re-making is more wasted than that because the pre-printing printing is performed again because the printed material becomes unusable and printed.

It is a schematic block diagram of the stencil printing apparatus suitable for implementation of this invention. It is a block diagram of the control system suitable for implementation of this invention. FIG. 6 is a perspective view illustrating a document width detection unit. FIG. 5 is a plan view of a document receiving table for explaining the arrangement of sensors for detecting document size together with the document receiving table. FIG. 3 is a plan view of a document receiving table for explaining an arrangement of a document size detection sensor together with a document receiving table and an example of a document arrangement. 5 is a table showing the relationship between sensor output combinations and document size. It is the front view explaining the positioning means on the plate-making printing apparatus of a plate-making apparatus. FIG. 3 is a partial configuration diagram of a stencil printing apparatus illustrating a multistage sheet feeding device.

Explanation of symbols

1 Stencil Printing Device 26 Control Unit 108 Automatic Document Feeder (ADF)
152 Document Size Detection Means

Claims (6)

In a stencil printing apparatus provided with an automatic document reader (hereinafter referred to as ADF) that sequentially conveys a plurality of documents to a reading unit,
When continuous prepress printing is started with a plurality of originals placed on the ADF, the original size is read by the original size detecting means, and the read data is made as original size data, and the subsequent original size is determined. A stencil printing apparatus comprising: control means for performing plate-making printing without changing original size data even if read data is different from already read original size data. An automatic document reader (hereinafter referred to as ADF) that can sequentially convey a plurality of documents to a reading unit is provided, and when a plurality of documents are placed on the ADF and continuous prepress printing is started, document size detection is performed. A stencil printing apparatus that reads a document size by means, and makes and prints the read data as document size data,
Control means for performing plate making without changing document size data even when a sensor that cannot be used as a sensor for detecting the document size is turned on when a document is set on the ADF and continuous plate-making printing is performed. A stencil printing apparatus characterized by that. In a stencil printing apparatus provided with an automatic document reader (hereinafter referred to as ADF) capable of sequentially conveying a plurality of documents to a reading unit,
When a document memory for storing document data is provided, all documents are read at the start of continuous plate making with a plurality of documents placed on the ADF, the data is stored in the document memory, and plate making starts In addition, the data stored in the original memory is read out and made with a master plate making length that matches the original size. When making a master plate length that matches the original size, the first original size and A stencil printing apparatus comprising control means for replacing the remaining data with the same original size in the original memory, and reading out the original data one by one from the original memory and performing plate-making printing. In the stencil printing apparatus according to claim 3,
When a document is set on the ADF and continuous prepress printing is performed, if the document size is changed while the entire document is read and the data is stored in the document memory, the document reading is stopped and the “document and paper size” A stencil printing apparatus comprising a control means for displaying a warning that "does not fit." In a stencil printing apparatus provided with an automatic document reader (hereinafter referred to as ADF) capable of sequentially conveying a plurality of documents to a reading unit,
A document memory for storing document data is provided, and all the documents are read at the start of continuous plate making with a plurality of documents placed on the ADF. The stencil is stored in the original memory and, when starting the plate making, reads out original data for each original one by one with the first original size from the top of the maximum size original data, and makes the plate making printing. Printing device. In a stencil printing apparatus provided with an automatic document reader (hereinafter referred to as ADF) capable of sequentially conveying a plurality of documents to a reading unit,
A multi-stage paper feeder is provided as the paper feeder, the original size is read by the original size detecting means, the read data is made as original size data, and the paper tray of the multi-stage paper feeder is selected to perform continuous plate making. A stencil printing apparatus comprising control means for performing printing and not changing a selection of a paper tray constituting the multi-stage sheet feeding device when a document size changes in the middle.

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