JP2005262550A - Stencil printing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly perform a book processing, which prints a printing domain corresponding to the domain except copy domains in white, even under the condition that the copy side of a copy is unknown, in stencil printing equipment, in which variable magnification factor processing is applied to an original image information based on the original image information obtained through the reading of a copy as the predetermined page of a book and a inputted set variable magnification factor so as to make up and print based on variable magnification factor processed image information. <P>SOLUTION: A book domain is decided based on a book size and the variable magnification factor inputted by an operator through a book size setting means so as to apply the book processing to the variable magnification factor processed image information based on the book domain in order to produce book-processed image information so as to make up and print based thereon. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention performs scaling processing on the original image information based on the input original image information and the scaling ratio to generate scaling-processed image information, and performs plate making based on the scaling-processed image information. A stencil printing apparatus that performs printing, and in particular, when a document is a book (book), a print region corresponding to a region other than the document region and a print region corresponding to a central portion of the document region are printed in white. The present invention relates to a stencil printing apparatus that performs processing.

  2. Description of the Related Art Conventionally, various stencil printing apparatuses that make a plate based on original image information obtained by reading a document with a scanner or the like and perform printing using the plate-making stencil sheet that has been made have been proposed.

  In the stencil printing apparatus as described above, image information that is a digital signal is input to the thermal head, the thermal head generates heat based on the input image information, and the generated heat causes a gap between the thermal head and the platen roller. The transported stencil sheet is subjected to thermal perforation to make a plate. The pre-made stencil sheet formed as described above is wound around a printing drum, and ink is supplied from the inside of the printing drum to the surface of the printing drum as the printing drum rotates. Then, ink is pushed out from the perforated portion of the plate-making stencil sheet, the printing paper passes between the printing drum and the press roller, and the ink passes through the perforated portion and is transferred to the printing paper for printing.

  As a stencil printing apparatus as described above, there has been proposed a stencil printing apparatus provided with a book mode for performing printing after applying a predetermined process to original image information when a document is a book. When a document is a book, the document is often read with the document pressure plate opened or the document pressure plate floating from the document placement plate by the thickness of the book. As shown in FIG. 10A, the print area is often printed in black or dark gray. Further, since the central portion of the book is also lifted from the original placement plate, the printing area corresponding to the central portion is also black or dark gray as shown in FIG. The book mode is a mode for performing processing for printing a print area corresponding to the area other than the document area and the central portion in order to avoid the above-described problem. FIG. 10B is a diagram illustrating a printed matter when printing is performed after processing in the book mode.

  Further, as a stencil printing apparatus as described above, the original image information is subjected to scaling (enlargement / reduction) processing based on the scaling ratio set in advance by the operator, and the scaling processing after the scaling processing has been performed. There has also been proposed a technique for making a plate based on image information and performing printing (see Patent Document 1).

  Here, in the stencil printing apparatus that performs the scaling process as described above, when printing in the book mode as described above, a document size such as A3, A4, or B4 is detected in advance by a sensor or the like, and A book area to which book processing is to be performed is determined based on the document size and scaling ratio, and the book processing is performed on the scaled image information so that a print area corresponding to an area other than the book area is printed in white. Plate making and printing were performed based on the processed image information. In addition, the position and width of the central portion is determined based on the book region determined as described above, and the central erasure processing is performed so that the print region corresponding to the central portion is printed white. Information processing was performed, and plate making and printing were performed based on the centrally processed image information.

JP 2000-326613 A

  However, since the book is bound at the center thereof, the book is rarely applied to a prescribed document size such as A3, A4, or B4, and the detected document size is often unknown. The book area cannot be determined based on the size and scaling factor. Therefore, when the document size is unknown as described above, for example, a method for detecting the printing paper size, regarding the printing paper size as the document size, and determining the book area based on the printing paper size and the scaling factor. However, if the book area is determined as described above, for example, if the scaled image information is smaller than the size obtained by multiplying the print paper size by the scaling ratio, the surrounding area is still Printed black. Also, since the center position and width of the book are determined based on the book area in the center erasing process, if the scaled image information is smaller than the size obtained by multiplying the print paper size by the scaling ratio, it is appropriate. The center position and width cannot be determined, and the portion to be printed black is printed white or the portion to be printed white is printed black.

  The present invention performs scaling processing on the original image information based on the input original image information and scaling ratio to generate scaling processed image information, and performs plate making based on the scaling processed image information. It is an object of the present invention to provide a stencil printing apparatus capable of appropriately performing the book processing and the central erasing process in a stencil printing apparatus that performs printing.

  The stencil printing apparatus of the present invention performs a scaling process on the original image information based on the original image information obtained by reading a document that is a predetermined page of the book and the set input scaling ratio. Printing is performed using a scaling process means for outputting image information, a plate making means for making a stencil by perforating the stencil sheet based on the scaled image information, and a stencil sheet made by the plate making means. In a stencil printing apparatus provided with a printing means, based on a book size setting means capable of setting and inputting a book size indicating the size of a predetermined page of a book, and a book size and a scaling factor set by the book size setting means Book area determination means for determining the book area and book processing that prints a white print area corresponding to an area other than the book area determined by the book area determination means is performed on the scaled image information. The book processing means for generating a book processed image information, characterized by comprising a plate making controller for plate making means controls the stencil making means to plate-making based on the book processed image information.

  Further, in the stencil printing apparatus, when the book size is set by the book size setting means, the plate making control means controls the plate making means to make a plate based on the book processed image information, and sets the book size. When the book size is not set by the means, the plate making means can be controlled so as to make the plate based on the scaling processed image information.

  Further, a center position determining means for determining the position of the center line of the book area determined by the book area determining means, and a center near the position of the center line based on the position of the center line determined by the center position determining means. A central erasure processing means for generating a centrally processed image information by performing a central erasure process such that a print area corresponding to a portion is printed in white on the scaled image information or the book processed image information, The plate making control means may control the plate making means so as to make the plate making based on the centrally processed image information.

  Further, it has center width determining means for determining the width of the center portion based on the book size and the scaling factor, and the central erasing processing means is the center line position and center width determining means determined by the center position determining means. Based on the width determined by the above, the central erasure process can be performed on the image information that has undergone the scaling process or the image information that has undergone the book processing.

  Also, a paper size detecting means for detecting the paper size of the printing paper used for printing, and a document area determining means for detecting the document size of the document and determining the document area based on the detected document size and magnification. A plate making area determining means for determining a plate making area based on the paper size detected by the paper size detecting means, the size of the original area determined by the original area determining means and the size of the book area, and a plate making area determining means. A plate making area that generates a plate making area processed image information by performing plate making area processing such that a printing area corresponding to an area other than the determined plate making area is printed in white on the scaled image information or book processed image information Processing means, and the plate making control means controls the plate making means so as to make the plate making based on the pre-processed area processed image information. That.

  Further, a center position determining means for determining the position of the center line of the book area determined by the book area determining means, and a central portion near the position of the center line based on the position of the center line determined by the center position determining means Central erasure processing means for generating a centrally processed image information by applying a central erasure process such that a print area corresponding to the image is printed in white on the scaled image information, the book processed image information, or the plate making area processed image information And the plate making control means controls the plate making means so as to make the plate making based on the centrally processed image information.

  Further, it has a center width determining means for determining the width of the center portion based on the book size and the scaling factor, and the center erasing processing means is determined by the center line position and the center width determining means determined by the center position determining means. Based on the determined width, the central erasure processing may be performed on the scaling-processed image information, the book-processed image information, or the plate-making region processed image information.

  Also, the paper size detected by the paper size detecting means is compared with the size of the original area determined by the original area determining means. If the original area size is larger than the paper size, the size of the paper size is determined. Plate making area candidate is determined based on the document area, and when the size of the document area is smaller than the paper size, the plate making area candidate determining means for determining the plate making area candidate based on the document area is provided. Is compared with the size of the plate-making area candidate determined by the plate-making area candidate determining means, and if the size of the book area is larger than the size of the plate-making area candidate, the plate-making area candidate is selected as the plate-making area candidate. If the size of the book area is smaller than the size of the plate making area candidate, the size of the book area can be set as the plate making area.

  In addition, it has a drum size detecting means for detecting the drum size of the printing drum used for printing, and the plate making area determining means has the drum size detected by the drum size detecting means and the paper size detected by the paper size detecting means. The plate making area can be determined based on the size of the document area and the size of the book area determined by the document area determining means.

  Also, the drum size detected by the drum size detecting means is compared with the paper size detected by the paper size detecting means. If the paper size is larger than the drum size, the drum size is set as the paper size and When the paper size is compared with the size of the document area, if the size of the document area is larger than the paper size, a platemaking area candidate is determined based on the size of the paper size, and the size of the document area is If the paper size is smaller than the drum size, a plate-making area candidate is determined. If the paper size is smaller than the drum size, the paper size detected by the paper size detecting means is compared with the original region. If the size of the area is larger than the paper size, the prepress area candidate is determined based on the size of the paper size, and the size of the original area is the paper size. If it is smaller, it has plate making area candidate determining means for determining a plate making area candidate based on the document area, and the plate making area determining means includes the size of the plate making area candidate determined by the plate making area candidate determining means and the book. If the size of the book area is larger than the size of the plate making area candidate, the plate making area candidate is set as the plate making area, and the size of the book area is smaller than the size of the plate making area candidate. The book area may be the size of the book area.

  Here, the “magnification ratio” refers to an enlargement ratio and reduction ratio when performing enlargement / reduction processing, and includes an equal magnification.

  Further, determining the “book area”, the “document area”, and the “plate making area” means determining the range and position of each area, but the positions are set using preset positions. It may be determined.

  The detection of the “paper size” or the “original size” means, for example, detecting a size such as A3, A4, or B4. The size may be detected indirectly by detecting information indicating the size, such as the length of the.

  The “drum size” refers to the size of the stencil sheet that has been preliminarily wound around the drum, such as A3, A4, or B4. The detection of the “drum size” is not limited to the case of directly detecting the size such as A3, A4, or B4, but the size is detected by detecting information related to the size such as the type of the printing drum. You may make it detect indirectly.

  According to the stencil printing apparatus of the present invention, the book area is determined based on the book size and the scaling ratio set by the book size setting means, and the book processing is performed on the scaled image information based on the book area. Since the book-processed image information is generated and the plate is made based on the book-processed image information, the document size is not detected as described above, and the book process cannot be performed based on the document size. Even in such a case, appropriate book processing can be performed on the image information that has been subjected to scaling processing based on the book area determined as described above.

  Further, in the stencil printing apparatus, the position of the center line is determined based on the book area determined as described above, and the center erasure processing is performed on the scaled image information or the book based on the position of the center line. When the processed image information is processed to generate the central processed image information and the plate making is performed based on the central processed image information, the document size is not detected as described above, but based on the document size. Even when the central erasure process cannot be performed, the central erasure process can be performed at an appropriate position based on the book area determined as described above.

  Further, the width of the central portion is determined based on the book size and the scaling factor set as described above, and the central erasure processing is performed based on the position and width of the central line determined as described above. In this case, the central erasing process can be performed with an appropriate width.

  Further, the plate making area is determined based on the size of the original area determined based on the paper size of the printing paper used for printing, the original size of the original, and the scaling ratio, and the size of the book area. If the plate making area processing is performed so that the printing area corresponding to the print area is printed in white, the plate making area processed image information is generated, and the plate making area is processed based on the plate making area processed image information, the plate making area Is made smaller than the size of the paper size, the ink coming out of the perforated stencil sheet corresponding to the range other than the range of the printing paper adheres to the press roller and stains the printing paper. This can be prevented. For example, when the document area is smaller than the book area, even if the book processing is performed based on the book area as described above, the print area corresponding to the area wider than the document area and narrower than the book area is still present. Although black printing is performed, such a problem can be avoided when the plate making area is determined in consideration of the document area as described above.

  In addition, when the drum size of the printing drum used for printing is detected and the plate making area is determined in consideration of the drum size, the plate making is prevented from being made in a range larger than the drum size. Can do.

  Hereinafter, an embodiment of the stencil printing apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing the overall configuration of the stencil printing apparatus.

  As shown in FIG. 1, the stencil printing apparatus 1 includes an image reading unit 10 that reads an image of a document, a plate making unit 20 that performs plate making on a stencil sheet based on image information read by the image reading unit 10, and a plate making unit 20. Printing means 30 for printing on the printing paper using the pre-made stencil stencil sheet, a paper feeding section 40 for feeding the printing paper to the printing means 30, a paper discharge section 50 for discharging the printed printing paper, and a book A setting unit 60 that can set a mode, a book size, and the like is provided.

  The image reading unit 10 is constituted by, for example, a flatbed type scanner device, and includes an image line sensor 11 having a number of photoelectric conversion elements such as CCDs extended in the main scanning direction, and the image line sensor 11 in the sub scanning direction. And a belt-type moving mechanism 12 that moves in the direction of arrow Y.

  The stencil making unit 20 includes a stencil sheet roll 21 in which a stencil sheet roll in which a stencil sheet is wound in a roll shape is rotatably supported, and a plurality of units that selectively generate heat based on image information read by the image reading unit 10. A plate making unit 22 having a thermal head in which a plurality of heating elements are arranged in a row, a platen roller 23 for conveying a base paper fed from the base paper roll unit 21, and a stencil sheet conveyed by the platen roller 23 with a predetermined length. And a base paper cutter 24 to be cut.

  The printing means 30 includes an ink-permeable cylindrical printing drum 31 such as a porous metal plate or a mesh structure, a squeegee roller 32, a doctor roller 33, an ink supply pump (not shown) disposed inside the printing drum 31, and the like. The ink supply device 34 and the press roller 36. A pre-made stencil sheet M is wound around the outer periphery of the printing drum 31. Further, the printing drum 31 is detachably installed, and a plurality of types of printing drums 31 can be attached to and detached from the stencil printing apparatus 1. The plurality of types of printing drums 31 have different printing areas, that is, ink passage areas such as those of A3 size and A4 size, and are exchanged as necessary.

  The paper feed means 40 includes a paper feed base 41 on which the print paper P is placed, a pickup roller 42 that picks up the print paper P from the paper feed base 41 one by one, a print drum 31 and a press roller 36. And a timing roller 43 for feeding between the two.

  The paper discharge means 50 includes a separation claw 51 that peels off the printed printing paper Q from the printing drum 31, a paper discharge feed belt section 52, and a paper discharge tray 53 on which the printed printing paper Q is stacked. .

  The setting means 60 is an operation panel composed of a liquid crystal panel, and can set various items relating to printing such as the number of prints, start and stop of printing, and the like. As shown in FIG. 2, the setting means 60 has a book mode setting means 61 capable of selecting a book mode, a book size setting means 62 capable of setting a book size, and a variable magnification when the original is read by the image reading means 10. A variable magnification setting means 63 that can be set is provided.

  Further, the stencil printing apparatus 1 includes a control means 70 for controlling the plate making operation in the plate making means 20 as shown in FIG. A block diagram showing a specific configuration of the control means 70 is shown in FIG.

  As shown in FIG. 2, the control means 70 includes a book area determination means 71 that determines a book area based on the book size and scaling ratio set by the setting means 60, and the book area determined by the book area determination means 71. A book processing means 72 for performing book processing such that a print area corresponding to a non-printing area is printed in white, a center position determining means 73 for determining the position of the center line of the book area determined by the book area determining means 71, and setting Center width determining means 74 for determining the width of the center portion centered on the position of the center line based on the book size and scaling ratio set in the means 60, and the position of the center line determined by the center position determining means 73 Based on the width of the central portion determined by the central width determining means 74, the print area corresponding to the central portion is printed white. Central erasure processing unit 75 for performing central erasing process, and an image processing unit 77 for performing such scaling plate making controller 76, and image the original image information read at the reading unit 10 for controlling the stencil making unit 20.

  Next, the operation of the stencil printing apparatus 1 will be described using the flowchart shown in FIG.

  First, various settings such as the number of prints are made in the setting means 60 by the operator of the apparatus, and when printing in the book mode, the book mode is selected in the book mode setting means 61 and printing is performed in the book mode. A signal indicating that the process is to be performed is output to the control means 70 (S1). Then, the book size setting means 62 sets and inputs a book size such as A3, A4 or B4 (the size of the page of the book to be actually printed) by the operator, and the scaling factor to be multiplied with the document is the scaling factor setting. Setting is input at the means 63, and these pieces of information are also input to the control means 70 (S2). When an operator presses a plate making start button (not shown) (S3), the image line sensor 11 is moved in the sub-scanning direction (arrow Y direction) by the moving mechanism 12, and the document loading table of the image reading means 10 is moved. A document, which is a predetermined page of a book stacked (not shown), is read by the image line sensor 11 (S4).

  The original image information read by the image reading unit 10 is input to the image processing unit 77. The image processing unit 77 performs density correction processing on the input original image information (S5), and then is input from the setting unit 60. Based on the scaling ratio, the scaling processing means 77a performs scaling processing on the original image information (S6), and performs binarization processing on the scaling processed image information (S7).

  Then, the book size and scaling ratio set by the setting means 60 are input to the book area determining means 71 of the control means 70. The book area determining means 71 multiplies the book size and the scaling ratio, and the calculation result is used as the book area. (S8). The determined book area is input to the book processing means 72.

  Then, the scaled image information subjected to the binarization processing by the image processing unit 77 is input to the book processing unit 72, and the book processing unit 72 uses the input book area to perform the scaling process image information. Is subjected to book processing, and the book processed image information is output to the central erasure processing means 75 (S9).

  The book area determined by the book area determining means 71 is also input to the center position determining means 73, and the center position determining means 73 determines the position of the center line of the input book area (S10). The book size and scaling ratio output from the setting means 60 are also input to the center width determining means 74, and the center width determining means 74 determines the width of the center portion based on the book size and scaling ratio (S10). . In the center width determining means 74, the width of the center portion corresponding to a predetermined book size and variable magnification is preset. Further, the center width determining means 74 may receive the book area from the book area determining means 71 and determine the width of the center portion based on the book area.

  Then, the position of the center line determined by the center position determining means 73 and the width of the center portion determined by the center width determining means 74 are input to the central erasing processing means 75, and the central erasing processing means 75 receives the input center. Based on the position of the line and the width of the center portion, the book-processed image information is subjected to center erasure processing and the center-processed image information is output to the plate making control means 76 (S11).

  Then, the plate making control means 76 outputs a control signal to the plate making means 20 so that the plate making is performed based on the inputted centrally processed image information (S12).

  On the other hand, in the plate making means 20, the stencil sheet is fed from the stencil sheet roll of the stencil roll unit 21 and conveyed to the plate making unit 22. In the plate making unit 22, the heating element of the thermal head selectively generates heat based on a control signal from the plate making control means 76, the stencil sheet is punched to form a plate making, and the formed plate making is the platen roller 23. Is conveyed toward the printing drum 31, cut by the base paper cutter 24, and wound around the printing drum 31.

  Then, ink of a predetermined color is supplied to the inside of the printing drum 31 by the ink supply device 34. When the printing drum 31 is driven to rotate in the counterclockwise direction in FIG. 1, the printing paper P is taken out from the paper feeding means 40 by the pickup roller 42 at a predetermined timing in synchronization with the rotation of the printing drum 31, and the timing roller 43 moves from left to right in FIG. 1 and is supplied between the printing drum 31 and the press roller 36. Then, stencil printing is performed on the printing paper P by press-contacting the printing paper P wound around the outer peripheral surface of the drum by the press roller 36 (S13).

  The printed printing paper Q is peeled off by the separation claw 51, transported to the paper discharge tray 53 by the paper discharge feed belt 52, and stacked on the paper discharge tray 53.

  When printing is not performed in the book mode, the normal mode is selected by the book mode setting unit 61, and a signal indicating that printing is performed in the normal mode is output to the control unit 70 (S1). Then, the scaling factor applied to the document by the operator is set and input in the scaling factor setting means 63 and input to the control means 70 (S14). When an operator presses a plate-making start button (not shown) (S15), the image line sensor 11 is moved in the sub-scanning direction (arrow Y direction) by the moving mechanism 12, and the document loading table (image reading unit 10) The original loaded on the document (not shown) is read by the image line sensor 11 (S16), and the read original image information is output to the control means 70.

  The original image information read by the image reading unit 10 is input to the image processing unit 77. The image processing unit 77 performs density correction processing on the input original image information (S17) and then inputs from the setting unit 60. Based on the scaled magnification, the scaling processing means 77a performs scaling processing on the original image information (S18), and binarization processing is performed on the scaled image information (S19).

  Then, the image processing information having undergone the binarization process is input to the plate making control means 76, and the plate making control means 76 performs the plate making based on the image processing information having undergone the magnification changing process. A control signal is output to (S20). Then, stencil printing is performed in the same manner as described above (S21).

  In the above embodiment, when printing is performed in the book mode, the central erasure processing is performed after the book processing is performed on the scaling-processed image information. The book processing may be performed after the central erasure processing is performed on the information. Further, only the book processing may be performed without performing the central erasure processing.

  In the above-described embodiment, both the position and the width of the central portion are determined from the book size and the scaling factor during the central erasing process, but only the position of the central portion is determined, A preset value may be used for the width of the portion.

  Further, in the stencil printing apparatus of the above embodiment, as shown in FIG. 4, a paper size detecting means 200 for detecting the paper size of the printing paper used for printing, and the original detected by detecting the original size of the original. An original area determining unit 80 that determines an original area based on the size and the scaling ratio may be provided, and plate making may be performed in consideration of the paper size of the printing paper and the original size. Specifically, when printing is performed in the book mode, as shown in the flowchart of FIG. 5, after performing the book processing in S9 of the flowchart shown in FIG. At the same time, the plate making area candidate determining means 78 compares the paper size previously detected by the paper size detecting means 200 with the original area determined by the original area determining means 80 (S22). If the document area is larger than the paper size, the paper size is determined as a platemaking area candidate (S23). If the document area is equal to or smaller than the paper size, the document area is determined as a platemaking area candidate (S23). S24). The document area determining means 80 determines the document area by multiplying the automatically detected document size and the scaling factor, and the method for detecting the document size will be described later.

 Next, the size of the book area is compared with the size of the plate making area candidate in the plate making area determination means 79 (S25). If the size of the book area is larger than the size of the plate making area candidate, the plate making area candidate is selected. The platemaking area is output to the platemaking area processing unit 81, and the platemaking area in which the printing area corresponding to the area other than the platemaking area is printed in white based on the platemaking area in the platemaking area processing unit 81. The processing is performed on the book-processed image information, and the plate-making area processed image information subjected to the plate-making area process is output to the central erasure processing means 75 (S26). Then, in the same manner as described above, the center position and the center width are determined from the scaling factor and the book size (S10), and the center erase process is applied to the plate-making area processed image information (S11), and then the center processed image is processed. The information is output to the plate-making control means 76, and the plate-making means 20 is controlled by the plate-making control means 76 to make a plate based on the centrally processed image information (S12), and printing is performed by the printing means 30 using the plate-making (S12). S13).

 When the size of the book area is equal to or smaller than the size of the plate making area candidate, the book area is set as the plate making area, and the plate making area is output to the plate making area processing means 81, and the plate making area processing means 81 performs the above plate making area. On the basis of this, plate making area processing is performed on the book processed image information, and the plate making area processed image information is output to the central erasure processing means 75 (S29). Then, in the same manner as described above, the center position and the center width are determined from the scaling factor and the book size (S10), and the center erase process is applied to the plate-making area processed image information (S11), and then the center processed image is processed. The information is output to the plate-making control means 76, and the plate-making means 20 is controlled by the plate-making control means 76 to make a plate based on the centrally processed image information (S12), and printing is performed by the printing means 30 using the plate-making (S12). S13).

Here, a table showing the relationship between the printing paper size, the document size, the book size, and the plate making area when the plate making area is determined according to the above embodiment is shown below.

  When determining the plate making area shown in the above table, if the original size is unknown, the original paper area is set to (print paper size × magnification). In the above table, when the size of the platemaking area and the printing paper size are the same, the size of the platemaking area or the area obtained by subtracting the margin area from the printing paper size may be replaced with the platemaking area.

 In addition, the document size detected by the document area determination unit 80 of the above-described embodiment, specifically, as shown in FIG. 6, a plurality of photosensors 102 to 105 are arranged in accordance with the document size, and the document The detection may be performed by detecting the change in the state of the photosensors 102 to 105 when the end surfaces (vertical and horizontal) of the original are respectively aligned with the corner guides of the original stopper 101 provided on the stacking table. Further, the document size may be calculated based on the number of pixel data of the original image information.

  The paper size detection means 200 is provided on the paper feed tray 41 and detects the paper size (width and length) of the print paper P stacked on the paper feed tray 41. Specifically, as shown in FIGS. 7A and 7B, a pair of plates formed in a plate shape so as to abut against both ends in the width direction of the stacked printing paper P and guide and hold the printing paper P. The width direction fences 201 are arranged correspondingly, and each width direction fence is provided with a bar-shaped fence rack 202. The fence rack 202 extends in the width direction of the printing paper P along the surface of the paper feed table 41 and is provided in the paper feed table 41. The fence rack 202 is fixed at a predetermined interval in the length direction of the printing paper P with the rack teeth facing each other. In addition, a rotary circular gear 203 that meshes with the rack teeth of each fence rack 202 is provided at the central portion of the front end portion of the paper feed table 41 on the paper feed side. A potentiometer 204 whose output (voltage) changes in conjunction with the rotation of the circular gear 203 is attached to the circular gear 203.

  One end in the length direction of the print paper P is aligned with one end of the paper feed side of the paper feed table 41, and the width direction fence 201 is set to the print paper P with respect to the paper feed table 41 with the center of the width of the print paper P as a reference When these are operated together, the respective fence racks 202 simultaneously move in opposite directions, and the circular gear 203 rotates. Thereby, the output of the potentiometer 204 attached to the circular gear 203 changes. The paper width of the printing paper P can be detected by the output of the potentiometer 204 when the width-direction fence 201 is in contact with both ends of the printing paper P in the width direction.

  In the center of the other end of the paper feed table 41, a length formed in a plate shape so as to contact the length of the stacked print sheets P and guide and hold the print sheets P in the length direction. A direction fence 205 is provided. The longitudinal fence 205 is provided with a rod-shaped fence rack 206. The fence rack 206 extends in the length direction of the printing paper P along the surface of the paper feed table 41 and is provided in the paper feed table 41. A rotating circular gear 207 is meshed with the rack teeth of the fence rack 206. A potentiometer 208 whose output (voltage) changes in conjunction with the rotation of the circular gear 207 is attached to the circular gear 207. One end in the length direction of the print paper P is aligned with one end of the paper feed side of the paper feed tray 41, and the length direction fence 205 is printed on the paper feed stand 41 with reference to the center of the paper width of the print paper P. When the sheets are operated together, the fence rack 206 moves and the circular gear 207 rotates. As a result, the output of the potentiometer 208 attached to the circular gear 207 changes. Then, the paper length of the printing paper P is detected by the output of the potentiometer when the length direction fence 205 comes into contact with the other end of the printing paper P in the length direction. Then, a paper size such as A3, A4, or B4 can be obtained based on the paper width and paper length of the printing paper P detected as described above.

  The paper size may not necessarily be automatically detected as described above. The paper size set and input by the operator may be detected by the paper size detecting means 200.

  Further, when printing in the normal mode in consideration of the printing paper size, the binarization process is performed on the scaling-processed image information in S19 of the flowchart shown in FIG. The means 79 compares the paper size previously detected by the paper size detection means 200 with the original area. If the original area is larger than the paper size, the paper size is determined as the prepress area, and the original area is the paper area. If the size is less than the size, the document area is determined as a plate making area, and the image processing area information is generated by performing the plate making area process on the scaled image information based on the plate making area. It is sufficient to make a plate and print based on the completed image information.

  Further, in the above-described embodiment, the image processing information subjected to the scaling process is subjected to the book processing, then the plate making area processing is performed, and then the central erasure processing is performed. However, the order of these processing is not limited thereto. Any order may be used.

  Further, the plate making may be formed in consideration of the size of the printing drum. Specifically, as shown in FIG. 8, a drum size detecting means 300 for detecting the drum size of the printing drum 31 shown in FIG. 1 is provided, and in the step S9 of the flowchart shown in FIG. After performing the book processing, the plate making area candidate determining unit 78 compares the drum size detected by the drum size detecting unit 300 with the paper size detected by the printing paper size detecting unit 100 (S32), and the drum size is determined. If it is larger than the paper size, the paper size is compared with the document area (S33). If the size of the document area is larger than the paper size, the paper size is determined as a candidate for the plate making area (S34). If the size of the document area is equal to or smaller than the paper size, the document area is determined as a plate making area candidate (S35). After the plate making area candidate is determined as described above, the processing after S25 is the same.

  If the drum size is smaller than the paper size, the drum size is set as the paper size (S36), and the paper size is compared with the size of the document area (S33). If it is larger than the size, the paper size is determined as a plate making area candidate (S34), and if the size of the original area is equal to or smaller than the paper size, the original area is determined as a plate making area candidate (S35). After the plate making area candidate is determined as described above, the processing after S25 is the same.

  As the drum size detecting means 300, for example, a plurality of dip switches may be provided, and the drum size may be detected by a combination of on / off of the plurality of dip switches. Storage means such as a stored memory may be provided, and the drum size may be read from the storage means. Moreover, you may make it detect using a sensor etc. Further, the drum size set and input by the operator may be detected.

  Further, when printing is performed in the normal mode in consideration of the printing paper size and the drum size, the binarization process is performed on the scaling-processed image information in S19 of the flowchart shown in FIG. In the plate making area determination unit 79, the drum size detected by the drum size detection unit 300 is compared with the paper size detected by the printing paper size detection unit 100. If the drum size is equal to or larger than the paper size, the paper size is determined. Is compared with the size of the document area, and if the size of the document area is larger than the size of the paper size, the paper size is determined as the plate making area, and if the size of the document area is equal to or smaller than the paper size, The size of the document area is determined as the plate making area.

  When the drum size is smaller than the paper size, the drum size is set as the paper size, the paper size is compared with the size of the document area, and when the size of the document area is larger than the size of the paper size. The paper size is determined as the plate making area, and when the size of the document area is equal to or smaller than the paper size, the document area is determined as the plate making area, and the image making process is performed on the scaled image information based on the plate making area. Is applied to generate prepress area processed image information, and prepress and print based on the prepress processed image information.

The figure which shows schematic structure of one Embodiment of the stencil printing apparatus of this invention. Block diagram of setting means and control means of the stencil printing apparatus shown in FIG. Flowchart for explaining the operation of the stencil printing apparatus of the present invention The block diagram of other embodiment of the stencil printing apparatus of this invention The flowchart for demonstrating the effect | action of the stencil printing apparatus of embodiment shown in FIG. FIG. 5 is a view for explaining a method for detecting a document size in the stencil printing apparatus according to the embodiment shown in FIG. The figure which shows the paper size detection means in the stencil printing apparatus of embodiment shown in FIG. The block diagram of other embodiment of the stencil printing apparatus of this invention Flowchart for explaining the operation of the stencil printing apparatus of the embodiment shown in FIG. Illustration for explaining book mode

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image reading means 20 Plate making means 30 Printing means 40 Paper feed means 50 Paper discharge means 60 Setting means 70 Control means 101 Stopper 102,103,104,105 Photo sensor 200 Paper size detection means 201 Width direction fence 202,206 Fence rack 203 , 207 Circular gears 204, 208 Potentiometer 205 Length direction fence 206 Fence rack 300 Drum size detection means

Claims (10)

Scaling that performs scaling processing on the original image information based on original image information obtained by reading a document that is a predetermined page of a book and a scaling factor that is set and input, and outputs scaled image information Processing means, plate making means for making a stencil by perforating the stencil sheet based on the scaling processed image information, and a printing means for printing using the stencil sheet made by the plate making means In the stencil printing machine,
Book size setting means capable of setting and inputting a book size indicating the size of a predetermined page of the book;
Book area determining means for determining a book area based on the book size set by the book size setting means and the scaling factor;
Book processing means for generating book processed image information by performing book processing such that a print area corresponding to an area other than the book area determined by the book area determining means is printed in white on the scaled image information When,
A stencil printing apparatus, comprising: a plate making control unit that controls the plate making unit so that the plate making unit makes a plate based on the book processed image information. The plate making control means
When the book size is set by the book size setting means, the plate making means is controlled to make a plate based on the book processed image information, and the book size is not set by the book size setting means. 2. The stencil printing apparatus according to claim 1, wherein the stencil making unit is controlled so as to make a stencil based on the scaling-processed image information. Center position determining means for determining the position of the center line of the book area determined by the book area determining means;
Based on the position of the center line determined by the center position determining means, a center erasing process is performed such that a print area corresponding to a center portion near the position of the center line is printed in white. A central erasure processing means for generating the central processed image information by applying to the book processed image information,
3. The stencil printing apparatus according to claim 1, wherein the plate making control unit controls the plate making unit to make a plate based on the central processed image information. A center width determining means for determining a width of the center portion based on the book size and the scaling factor;
The central erasure processing unit adds the scaling processed image information or the book processed image information to the scaled image information or the book processed image information based on the center line position determined by the center position determining unit and the width determined by the center width determining unit. 4. The stencil printing apparatus according to claim 3, wherein a central erasing process is performed. Paper size detecting means for detecting the paper size of the printing paper used for the printing;
A document area determining means for detecting a document size of the document and determining a document area based on the detected document size and the scaling factor;
Plate making area determining means for determining a plate making area based on the paper size detected by the paper size detecting means, the size of the document area determined by the document area determining means, and the size of the book area;
Plate making area processing is performed by performing plate making area processing such that a printing area corresponding to an area other than the plate making area determined by the plate making area determination means is printed in white on the scaled image information or the book processed image information. Plate making area processing means for generating finished image information,
3. The stencil printing apparatus according to claim 1, wherein the plate making control unit controls the plate making unit so as to perform plate making based on the plate making area processed image information. Center position determining means for determining the position of the center line of the book area determined by the book area determining means;
Based on the position of the center line determined by the center position determining means, the center erasure process is performed such that the print area corresponding to the center portion near the position of the center line is printed in white. A central erasure processing means for generating central processed image information by applying to the book processed image information or the plate making area processed image information,
6. The stencil printing apparatus according to claim 5, wherein the plate making control unit controls the plate making unit to make a plate based on the central processed image information. A center width determining means for determining a width of the center portion based on the book size and the scaling factor;
The central erasure processing unit is configured to change the scaled image information, the book processed image information, or the book based on the position of the center line determined by the center position determining unit and the width determined by the center width determining unit. The stencil printing apparatus according to claim 6, wherein the central erasure process is performed on the image information processed with the plate making area. The paper size detected by the paper size detecting means is compared with the size of the original area determined by the original area determining means, and if the original area size is larger than the paper size, the paper size Plate making area candidate determining means for determining a plate making area candidate based on the original area when the original area is smaller than the paper size. ,
When the plate making area determining means compares the size of the plate making area candidate determined by the plate making area candidate determining means with the size of the book area, and the book area size is larger than the size of the plate making area candidate The plate-making area candidate is a plate-making area, and when the size of the book area is smaller than the size of the plate-making area candidate, the size of the book area is the plate-making area. The stencil printing apparatus according to any one of claims 5 to 7. A drum size detecting means for detecting a drum size of a printing drum used for the printing;
The plate making area determining means is configured to detect the drum size detected by the drum size detecting means, the paper size detected by the paper size detecting means, the size of the original area determined by the original area determining means, and the size of the book area. The stencil printing apparatus according to claim 5, wherein the stencil making area is determined based on the stencil. Comparing the drum size detected by the drum size detecting means with the paper size detected by the paper size detecting means;
If the paper size is larger than the drum size, the paper size is compared with the size of the document area after the drum size is the paper size.
When the size of the document area is larger than the paper size, a platemaking area candidate is determined based on the size of the paper size, and when the size of the document area is smaller than the paper size, A plate making area candidate is determined based on the document area,
When the paper size is smaller than the drum size, the paper size detected by the paper size detecting means is compared with the original area, and when the original area size is larger than the paper size. A plate making area candidate is determined based on the size of the paper size, and if the size of the document area is smaller than the paper size, a plate making area candidate is determined based on the document area. Having means,
The plate making area determining means compares the size of the plate making area candidate determined by the plate making area candidate determining means with the size of the book area, and the book area size is larger than the size of the plate making area candidate. The plate-making area candidate is a plate-making area, and when the size of the book area is smaller than the size of the plate-making area candidate, the size of the book area is the plate-making area. The stencil printing apparatus according to claim 9.

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