Image processing system, recording medium selection method, and program

Abstract

To increase the accuracy of selecting a sheet on which image formation or post-processing is performed.SOLUTION: An image processing system comprises: an error allowable range information storage unit that stores information on an allowable error range for a reference value of sheet information indicating the characteristics of a sheet; and a sheet selection unit 125 that, when an error in the sheet information acquired by a sheet reading unit reading the sheet is a value outside the error allowable range, selects a sheet linked to the sheet information of the error outside the error allowable range as a sheet on which image forming processing, post-processing, or inspection processing is not performed.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an image processing system, a recording medium selection method, and a program.

Background Art

[0002] In recent years, in the printing industry, in order to meet various needs of users such as generating high-precision printed materials, the popularity of image processing systems that can perform various print job settings and post-processing settings, and image forming apparatuses that can perform automatic inspection has been progressing.

[0003] In order to obtain printed materials corresponding to various needs of users, it is necessary for a control unit or the like that controls printing or post-processing to grasp paper information such as the size, basis weight, and thickness of the paper to be subjected to image formation (printing) or post-processing. However, the paper information of each sheet of paper does not completely match, and includes errors.

[0004] For example, even if we take the size of the paper as an example, even for the same A4-sized paper, the size of Company A is as per the standard, the size of Company B is -0.3 mm from the standard, and the size of Company C is +0.3 mm, etc. Differences in paper size occur depending on the paper manufacturer or the like. This is because the production method of the paper, the storage environment of the paper such as humidity, and the storage method are different for each paper manufacturer, and it is difficult to eliminate the error in paper size caused by the paper manufacturer.

[0005] However, if printing or post-processing is performed without considering these errors, problems such as an error occurring and printing being impossible, or even if printing is possible, the quality of the printed material not meeting the user's needs will occur.

[0006] Patent Document 1 discloses a paper feeding device including a registration unit that registers two or more different types of sheets, a calculation unit that calculates a specific threshold value for discriminating each type of sheet from the characteristic values of the sheets obtained for each registered type, and a discrimination unit that discriminates which type of sheet among the registered types the sheet fed from the tray is based on the characteristic value of the sheet detected from the sheet fed from the tray and the specific threshold value.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] The technology described in Patent Document 1 discriminates which type of sheet among the registered types the sheet fed from the tray is. Therefore, even if the sheet (paper) fed from the tray is a paper with a large error, the paper will be classified into one of the types. And when printing or post-processing is performed on the classified type of paper, problems such as an error occurring and printing being impossible, or even if printing is possible, the quality of the printed matter not meeting the user's needs may occur. Therefore, there has been an expectation for providing a technology for improving the selection accuracy of the paper on which image formation or post-processing is performed.

[0009] The present invention has been made to solve the above problems, and an object thereof is to improve the selection accuracy of the paper on which image formation or post-processing is performed.

Means for Solving the Problems

[0010] An image processing system according to an aspect of the present invention includes an error tolerance range information storage unit that stores information on an allowable error range with respect to a reference value of recording medium information indicating the characteristics of a recording medium, and when the error of the recording medium information acquired by the recording medium reading unit reading the recording medium is a value outside the allowable error range, a recording medium selection unit that selects the recording medium associated with the recording medium information having an error outside the allowable error range as a recording medium not subject to image formation processing, post-processing, or inspection processing.

Advantages of the Invention

[0011] According to the present invention, the selection accuracy of the paper on which image formation or post-processing is performed can be improved.

Brief Description of the Drawings

[0012]

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Embodiments for Carrying Out the Invention

[0013] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this specification and the drawings, elements having substantially the same function or configuration are denoted by the same reference numerals, and duplicate explanations are omitted.

[0014] <First Embodiment> [Configuration of Image Processing System] FIG. 1 is a diagram showing a configuration example of an image processing system 100 according to a first embodiment of the present invention. As shown in FIG. 1, the image forming system 1 includes image forming systems 1-1 to 1-n (n is a natural number of 2 or more) and a data collection server 2. The image forming systems 1-1 to 1-n and the data collection server 2 are communicably connected via a network N. The image forming systems 1-1 to 1-n are each configured, for example, as an image forming system installed in each of a plurality of different printing companies, but may be configured as a plurality of image processing systems within the same printing company.

[0015] The image forming systems 1-1 to 1-n are systems that form an image on a sheet of paper (an example of a recording medium) fed from a paper feeding device 11 (see FIG. 2), and then perform post-processing such as stapling, cutting, and binding on the printed matter on which the image is formed. In the following description, when it is not necessary to distinguish between the image forming systems 1-1 to 1-n, these are collectively referred to as the "image forming system 1". The configuration of the image forming systems 1-1 to 1-n will be described in detail with reference to FIG. 2 below.

[0016] The data collection server 2 is a server that manages information on the error tolerance range used for sorting sheets of paper, and is provided, for example, in a cloud environment. The data collection server 2 includes an error tolerance range setting unit 21, a reference value information storage unit 22, and an error tolerance range information storage unit 23.

[0017] The error tolerance range setting unit 21 sets each reference value corresponding to each sheet information (an example of recording medium information) of the sheet of paper, and sets an error tolerance range used for sorting the sheet of paper based on the reference value. The error tolerance range is set as at least one of a minimum allowable value and a maximum allowable value with respect to the reference value, or as an error tolerance ratio (%) with respect to the reference value.

[0018] The error tolerance range setting unit 21 acquires a reference value from, for example, a paper profile set on the paper and stores it in the reference value information storage unit 22. Alternatively, the error tolerance range setting unit 21 may acquire the reference value from the information of a post-processing job transmitted to the image forming system 1 from a terminal device (not shown) connected to the image forming system 1. Alternatively, the error tolerance range setting unit 21 may set the value input from the operation input unit (not shown) of the image forming system 1 or the terminal device as the reference value.

[0019] The reference value information storage unit 22 is a storage unit that stores the information of the reference value set by the error tolerance range setting unit 21. The error tolerance range information storage unit 23 is a storage unit that stores the information of the error tolerance range (error tolerance range information) set by the error tolerance range setting unit 21. The error tolerance range information is composed of a post-processing paper information correspondence table 231 (see FIG. 4) and an error tolerance range information table 232 (see FIG. 5).

[0020] The post-processing paper information correspondence table 231 is a table in which the type of post-processing, the type of paper information referred to at the time of performing the post-processing, and the range of the error tolerance range are managed in association with each other. The range of the error tolerance range includes, for example, "A (narrow)", "B (no setting or wide)" (see FIG. 4), etc.

[0021] The error tolerance range of "A (narrow)" is a tolerance range defined by an upper limit value and a lower limit value close to the reference value of the paper information, or a tolerance range in which the error tolerance ratio (%) with respect to the reference value is set narrow. By performing paper selection using the error tolerance range of "A (narrow)" by the paper selection unit 125 (see FIG. 2), the selection accuracy of the paper can be made higher, and the quality of the printed matter can be improved.

[0022] On the one hand, the error tolerance range of "wider" in "B (no setting or wider)" is an allowable range set such that the amount or ratio of deviation from the reference value of the paper information is wider than the error tolerance range of "A (narrower)". For paper characteristics with little relevance to the subsequent processing performed, the error tolerance range of "B (no setting or wider)" is set. Therefore, by the paper selection unit 125 performing paper selection using the error tolerance range of "B (no setting or wider)", the probability of a situation where a paper is determined to be defective based on paper information with little relevance to the subsequent processing can be suppressed to a low level.

[0023] In the error tolerance range information table 232, paper information is associated with the error tolerance range of "A (narrower)" and the error tolerance range of "wider" in "B (no setting or wider)". The post-processing paper information correspondence table 231 will be described in detail with reference to FIG. 4 described later, and the error tolerance range information table 232 will be described in detail with reference to FIG. 5 described later.

[0024] [Configuration of the Image Forming System] Next, with reference to FIG. 2, the configuration of the image forming system 1 according to the present embodiment will be described. FIG. 2 is a block diagram showing a configuration example of the image forming system 1. As shown in FIG. 2, the image forming system 1 includes a paper feeding device 11, a paper reading unit 12, an image forming device 13, and a post-processing device 14.

[0025] (Paper Feeding Device) The paper feeding device 11 has paper feeding trays 111 to 113, and papers with different paper sizes, basis weights, etc. are respectively accommodated in each of the paper feeding trays 111 to 113. The paper feeding device 11 conveys the paper fed from any one of the paper feeding trays 111 to 113 to the paper reading unit 12. Although FIG. 1 shows an example in which the paper feeding device 11 has three paper feeding trays, the present invention is not limited to this. The number of paper feeding trays of the paper feeding device 11 is not limited to three, and may be two or less, or four or more.

[0026] (Paper Reading Unit) The paper reading unit 12 (an example of a recording medium reading unit) is a functional unit that acquires paper information indicating the characteristics of the paper, and includes a paper size detection unit 121, a basis weight detection unit 122, a paper thickness detection unit 123, an error calculation unit 124, and a paper selection unit 125.

[0027] The paper size detection unit 121 is constituted by, for example, a line sensor (not shown) such as a CIS (Contact Image Sensor), and detects the size of the paper based on the size of each pixel read by the line sensor.

[0028] The basis weight detection unit 122 is constituted by, for example, a transmissive optical sensor including a light emitting unit and a light receiving unit, and detects the basis weight of the paper based on the attenuation rate (transmittance) of the light transmitted through the paper.

[0029] The paper thickness detection unit 123 detects the thickness (paper thickness) of the paper based on the distance between two members when two members of a paper thickness detection unit (not shown) sandwich the paper.

[0030] The error calculation unit 124 calculates the error of the paper information by comparing each piece of paper information detected by each of the above-described detection units with the reference value stored in the reference value information storage unit 22 of the data collection server 2. That is, the error calculation unit 124 calculates the error of the paper size, basis weight, or paper thickness. When the post-processing set in the post-processing job targets a plurality of sheets of paper, the error calculation unit 124 also performs a process of accumulating the errors for the number of sheets of paper to obtain an integrated error.

[0031] The paper selection unit 125 (an example of a recording medium selection unit) determines whether or not the error or integrated error calculated by the error calculation unit 124 falls within the error tolerance range stored in the error tolerance range information storage unit 23 of the data collection server 2. When the paper selection unit 125 determines that the error is outside the error tolerance range, the paper selection unit 125 purges the paper to be determined from the purge tray 126 provided in the paper reading unit 12 as a paper not subject to image formation processing or post-processing.

[0032] In addition, when the paper sorting unit 125 detects a sheet of paper with an error exceeding the error tolerance range, it may display a notification, an alert, or the like on the screen of the display unit of the image forming system 1 or a terminal device (not shown). In this case, the notification or alert may be given by voice via a speaker (not shown) provided in the image forming system 1 or a terminal device (not shown).

[0033] Each piece of paper information detected by each detection unit of the paper reading unit 12 is transmitted to the subsequent post-processing device 14. Then, a control unit (not shown) of the post-processing device 14 controls the post-processing operation on the paper based on the paper information transmitted from the paper reading unit 12.

[0034] Note that the various sensors included in the paper reading unit 12 and the types of paper characteristics detected by the sensors are not limited to the example shown in FIG. 2. For example, the paper reading unit 12 may acquire other paper information such as the bending strength of the paper, the color of the paper, smoothness, glossiness, the depth of the recess, moisture content, charge amount, etc.

[0035] (Image forming apparatus) The image forming apparatus 13 is a direct transfer type image forming apparatus that uses electrophotographic process technology. That is, the image forming apparatus 13 forms an image by directly transferring the toner image formed on a photosensitive drum (not shown) onto the paper. The formation of an image on the paper by the image forming apparatus 13 is performed based on a print job transmitted from a terminal device (not shown) or the like. Note that, in the present embodiment, an example in which the image forming apparatus 13 is an image forming apparatus that forms an image by an electrophotographic method is given, but the present invention is not limited thereto. The image forming apparatus according to the present invention may be applied to an image forming apparatus using another image forming method such as an inkjet method.

[0036] As shown in FIG. 1, the image forming apparatus 13 includes an image forming unit 131 and a paper reversing unit 132. The image forming unit 131 includes a photosensitive drum (not shown), a developing device, a transfer unit, a fixing unit, etc. The developing device forms a toner image by visualizing an electrostatic latent image by attaching toner to the surface of the photosensitive drum. The transfer unit transfers the toner image formed on the photosensitive drum to a sheet of paper. The fixing unit performs a fixing process of fixing the image on the sheet of paper by heating and pressing the sheet of paper onto which the toner image has been transferred by the transfer unit. The image forming unit 131 forms an image on the front surface of the sheet of paper or the back surface of the sheet of paper reversed by the sheet reversing unit 132. The sheet reversing unit 132 reverses the front and back of the sheet of paper on which an image has been formed on the surface, and conveys the sheet of paper with the back surface becoming the upper surface to the image forming unit 131.

[0037] (Post-processing device) The post-processing device 14 includes a stapling processing unit 141, a cutting processing unit 142, and a binding processing unit 143. The stapling processing unit 141 performs a stapling process of bundling a plurality of sheets of paper output from the sheet reading unit 12 and driving staples into the ends of the plurality of sheets of paper (paper bundle). The cutting processing unit 142 performs a cutting process of cutting the edge of the sheet of paper output from the sheet reading unit 12. The types of cutting include four-sided cutting for cutting the four sides around the sheet of paper, two-sheet cutting for dividing the sheet of paper into two sheets, and card cutting for cutting the sheet of paper into a plurality of sheets to form a card.

[0038] The binding processing unit 143 performs a binding process on a plurality of sheets of paper output from the sheet reading unit 12. The types of binding styles include saddle-stitch binding, perfect binding, and spiral binding. Saddle-stitch binding is a binding style in which the ends of the sheets of paper are stapled together, and perfect binding is a binding style in which the central part of the sheets of paper stacked in an open-book state is stapled together. Spiral binding is a binding style in which the sheets of paper are bundled, glued to the spine, and wrapped with a cover for binding. In the binding process, corner-back formation for forming a corner-back on the back part of the bound sheets of paper and trimming for trimming the uneven state of the fore-edge side of the bound booklet may also be performed.

[0039] For example, staple processing involves the risk of staple needle buckling, but this risk is generally known to be proportional to the thickness of the paper sheets that make up the paper bundle to be stapled and the total basis weight of the paper sheets. Therefore, when staple processing is carried out, it is common for the maximum number of target sheets for stapling, such as up to N sheets for plain paper, to be specified. This maximum number is determined solely by the thickness and basis weight within the specifications of the paper sheets.

[0040] However, as described above, since there are variations (errors) in the thickness and basis weight of the paper sheets, when a paper bundle is composed of multiple sheets, a situation may occur where it cannot be guaranteed that all the paper sheets making up the paper bundle have a thickness and basis weight below the specifications. In this case, even if the paper bundle has a number of sheets below the specified maximum number, the risk of staple needle buckling remains.

[0041] In contrast, in the image processing system 100 according to the present embodiment, the paper reading unit 12 measures paper information such as the thickness and basis weight for all the paper sheets that make up the paper bundle, and the error calculation unit 124 calculates the integrated value of the errors (integrated error). Then, the paper selection unit 125 determines whether the integrated error exceeds a preset error tolerance range, and when the integrated error exceeds the error tolerance range, performs control such as purging the paper or notifying that the error has been exceeded. Therefore, according to the present embodiment, it is possible to prevent problems such as an error occurring and printing being impossible, or even if printing is possible, the quality of the printed matter not meeting the user's needs. As a result, the selection accuracy of the paper for image formation or post-processing can be improved.

[0042] The above effect can be obtained in the same way not only for staple processing but also when post-processing such as folding or corner creasing is carried out. That is, according to the present embodiment, since it is ensured that the paper information such as the thickness and basis weight of all the paper sheets that make up the paper bundle meets the specifications defined by the error tolerance range, the finishing accuracy of the post-processing can be improved.

[0043] Note that the configuration of the post-processing device 14 is not limited to the example shown in FIG. 2. For example, the post-processing device 14 may be capable of performing other post-processing such as center binding, center folding, Avalokitesvara folding, triple-fold stacking, lamination, etc.

[0044] (Configuration of the control systems of the data collection server and the image forming system) Next, with reference to FIG. 3, the configuration of each control system of the image forming system 1 and the data collection server 2 included in the image processing system 100 according to the present embodiment will be described. FIG. 3 is a block diagram showing an example of the hardware configuration of each device constituting the image processing system 100. The computer 50 shown in FIG. 3 is hardware used as a so-called computer.

[0045] The computer 50 includes a control unit 51, a non-volatile storage 52, a display unit 53, an operation input unit 54, and a communication I / F (Interface) 55, which are respectively connected to a bus B.

[0046] The control unit 51 includes a CPU (Central Processing Unit) 511, a ROM (Read Only Memory) 512, and a RAM (Random Access Memory) 513.

[0047] The CPU 511 reads the program code of the software that realizes each function according to the present embodiment from the ROM 512, expands it in the RAM 513, and executes it. Variables, parameters, etc. generated during the arithmetic processing by the CPU 511 are temporarily written into the RAM 513.

[0048] Note that the control unit 51 may include a processing device such as an MPU (Micro-Processing Unit) instead of the CPU 511, and in the control unit 51, the CPU and the MPU may be used in combination. Further, the control unit 51 may be configured by an FPGA (Field-Programmable Gate Array), an ASIC (Application Specific Integrated Circuit), or the like.

[0049] As the non-volatile storage 52, for example, an HDD (Hard Disk Drive), an SSD (Solid State Drive), a flexible disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a non-volatile memory card, etc. can be used. In this non-volatile storage 52, in addition to an OS (Operating System) and various parameters, a program for operating the computer 50, a program of software for realizing each function according to this embodiment, etc. are recorded. Note that the program may be stored in the ROM 512.

[0050] The program is stored in the form of program codes readable by a computer, and the CPU 511 sequentially executes operations according to the program codes. That is, the ROM 512 or the non-volatile storage 52 is used as an example of a computer-readable non-transitory recording medium storing a program executed by a computer.

[0051] The display unit 53 is, for example, a monitor configured by an LCD (Liquid Crystal Display) or the like, and displays on the screen the result of processing performed by the computer 50, a UI (User Interface: not shown) for setting an error tolerance range, etc. Further, the display unit 53 displays on the screen a notification, an error, etc. when the error or the integrated error of the sheet information calculated by the error calculation unit 124 exceeds the error tolerance range.

[0052] The operation input unit 54 is configured by, for example, a keyboard, a mouse, etc., and generates an operation signal according to an operation by the user and supplies it to the CPU 511. Note that the display unit 53 and the operation input unit 54 may be integrally configured as a touch panel.

[0053] For the communication I / F 55, for example, a NIC (Network Interface Card) or the like is used, and various data can be transmitted and received to and from an external device via a network or a communication line.

[0054] [Configuration of Tolerance Information] Next, a configuration example of the tolerance information stored in the tolerance information storage unit 23 (see FIG. 1) will be described. FIG. 4 is a diagram showing a configuration example of the post-processing paper information correspondence table 231 that constitutes the tolerance information, and FIG. 5 is a diagram showing a configuration example of the tolerance information table 232.

[0055] [Configuration of Post-Processing Paper Information Correspondence Table] As shown in FIG. 4, in the post-processing paper information correspondence table 231, for each post-processing of "staple", "small-lot cutting", "corner-back formation", and "card cutting", an identifier of "A" or "B" indicating the type and range width of the tolerance for the paper information is associated. In the example shown in FIG. 4, the paper information is provided with "paper size", "paper thickness", and "basis weight". "A" stored in the post-processing paper information correspondence table 231 shown in FIG. 4 is an identifier indicating that the tolerance range is "A (narrowed)", and "B" is an identifier indicating that the tolerance range is "B (widened)" or that the tolerance range is "not set".

[0056] For example, for the post-processing of "staple", "B (widened or not set)" is associated with "paper size", and "A (narrowed)" is associated with "paper thickness" and "basis weight" respectively. That is, when the type of post-processing set in the post-processing job is "staple", the paper selection unit 125 (see FIG. 2) applies a tolerance range of "B (widened or not set)" to the paper selection based on "paper size", or does not set the tolerance range, that is, does not perform paper selection based on the tolerance range. On the other hand, in the paper selection based on "paper thickness" or "basis weight", a tolerance range of "A (narrowed)" is applied.

[0057] The tolerance range of "A (narrow)" and the tolerance range of "B (wide)" are defined in the tolerance range information table 232. When "B" is set, the setting of whether to use the tolerance range of "wide" or not to set the tolerance range can be set by the user via a setting screen (not shown) or the like. Alternatively, it may be set in advance as an initial value.

[0058] (Configuration of the tolerance range information table) As shown in FIG. 5, in the tolerance range information table 232, paper information such as "main scanning paper size (mm)", "sub-scanning paper size (mm)", "paper thickness (mm)", and "basis weight (g)" is associated with the tolerance range corresponding to "A" and the tolerance range corresponding to "B". The tolerance range of "A" is the tolerance range of "A (narrow)", and the tolerance range of "B" is the tolerance range of "B (wide)".

[0059] The "main scanning paper size" indicates the paper size in the main scanning direction in the scanning direction by the image forming unit 131 (see FIG. 2) of the image forming apparatus 13, that is, the size of the paper width. The "sub-scanning paper size" indicates the paper size in the sub-scanning direction in the scanning direction of the image forming unit 131, that is, the length of the paper. In the example shown in FIG. 5, for each of "A" and "B" of the main scanning paper size, the tolerance range when the median value is "210.0 mm" is set. Also, for each of "A" and "B" of the sub-scanning paper size, the tolerance range when the median value is "297.0 mm" is set.

[0060] In addition, for each of the thicknesses "A" and "B", an error tolerance range is set when the median value is "0.10 g", and for each of the basis weights "A" and "B", an error tolerance range is set when the median value is "70.0 g". That is, the error tolerance range for A4-sized paper is defined in FIG. 5. The error tolerance range information table 232 is set corresponding to each paper size assumed to be used. Alternatively, information on the error tolerance ranges corresponding to all paper sizes may be set in one error tolerance range information table 232.

[0061] Note that in the above-described embodiment, an example in which the error tolerance range information is composed of the post-processing paper information correspondence table 231 and the error tolerance range information table 232 has been given, but the present invention is not limited to this. For example, only a table (error tolerance range information table) in which an error tolerance range whose width has been adjusted in advance is associated with the type of post-processing may be provided.

[0062] [Paper sorting process] Next, with reference to FIGS. 6 to 9, the paper sorting process by the image processing system 100 will be described. FIG. 6 is a flowchart showing an example of the procedure of the paper sorting process when the post-processing is stapling, and FIG. 7 is a flowchart showing an example of the procedure of the paper sorting process when the post-processing is invoice cutting. FIG. 8 is a flowchart showing an example of the procedure of the paper sorting process when the post-processing is corner folding, and FIG. 9 is a flowchart showing an example of the procedure of the paper sorting process when the post-processing is card cutting.

[0063] (Paper discrimination process during stapling) First, with reference to FIG. 6, the paper discrimination process during stapling will be described. First, a paper is fed from the paper feeding device 11 (see FIG. 2) (S1). Next, the paper reading unit 12 reads the paper and acquires paper information (S2). Next, the error calculation unit 124 calculates a paper error (S3).

[0064] Next, the error calculation unit 124 integrates the paper errors to calculate the integrated error (S4). Next, the error calculation unit 124 determines whether the integrated error for the stack of papers to be stapled has been calculated (S5). If it is determined that the integrated error for the stack of papers has not been calculated (S5 is NO), the process returns to step S1.

[0065] On the other hand, if it is determined that the integrated error for the stack of papers has been calculated (S5 is YES), the paper selection unit 125 determines whether the integrated error for the stack of papers is a value that can cause staple buckling (S6). According to the post-processing paper information correspondence table 231 shown in FIG. 4, the width of the error tolerance range associated with the post-processing of "staple" is such that the "paper size" is "B (wide)", and the "paper thickness" and "basis weight" are "A (narrow)". Therefore, the paper selection unit 125 makes the determination in step S6 by referring to the error tolerance range in the error tolerance range information table 232 (see FIG. 5) corresponding to these.

[0066] In step S6, if it is determined that the integrated error for the stack of papers is not a value that can cause staple buckling (S6 is NO), the paper selection unit 125 instructs the staple processing unit 141 (see FIG. 2) to perform staple processing (S7).

[0067] On the other hand, in step S6, if it is determined that the integrated error for the stack of papers is a value that can cause staple buckling (S6 is YES), the paper selection unit 125 instructs the staple processing unit 141 not to perform staple processing. Further, the paper selection unit 125 notifies that staple processing is not to be performed (S8). After the processing in step S7 or step S8, the paper selection process ends.

[0068] According to the above-described embodiment, the user side sets an appropriate range for the error tolerance range. With this setting, even when paper information such as paper size, paper thickness, and basis weight includes errors, it is possible to prevent the occurrence of a situation where the staple buckles.

[0069] (Paper selection process during the implementation of retail cutting processing) Next, referring to FIG. 7, the paper discrimination process during the implementation of the petty cutting process will be described. Since the processes from S11 to S13 in FIG. 7 are the same as the processes from S1 to S3 in FIG. 6, the description thereof will be omitted.

[0070] After the paper error is calculated in step S13, the error calculation unit 124 updates the maximum value and the minimum value of the paper error (S14). That is, until the stack of papers to be subjected to the petty cutting process is formed, the error calculation unit 124 updates the maximum value and the minimum value of the paper error each time. Next, the error calculation unit 124 determines whether the calculation of the paper error for the stack of papers to be stapled is completed (S15). If it is determined in step S15 that the calculation of the paper error for the stack of papers is not completed (S15 is NO), the process returns to S11.

[0071] On the other hand, if it is determined in step S15 that the calculation of the paper error for the stack of papers is completed (S15 is YES), the paper selection unit 125 refers to the maximum value and the minimum value of the paper error updated in S14 (S16). Next, the paper selection unit 125 determines whether the maximum value and the minimum value of the paper error are within the error tolerance range respectively (S17).

[0072] According to the post-processing paper information correspondence table 231 shown in FIG. 4, the width of the error tolerance range associated with the post-processing of "petty cutting" is such that the "paper size" is "A (narrow)", and the "paper thickness" and "basis weight" are "B (wide)". Therefore, the paper selection unit 125 makes the determination in step S17 by referring to the error tolerance range in the error tolerance range information table 232 corresponding thereto.

[0073] If it is determined in step S17 that both the maximum value and the minimum value of the paper error are within the error tolerance range (S17 is YES), the paper selection unit 125 instructs the cutting process unit 142 (see FIG. 2) to perform the petty cutting process (S18).

[0074] On the other hand, in S17, when it is determined that the maximum value and / or the minimum value of the paper error is outside the error tolerance range (S17 is NO), the paper sorting unit 125 instructs the cut-off processing unit 142 not to perform the invoice cut-off process. Further, the paper sorting unit 125 notifies that the invoice cut-off process is not performed (S19). After the process of step S18 or step S19, the paper sorting process ends.

[0075] According to the above-described embodiment, the user side sets an appropriate range within the error tolerance range. By this setting, even when the paper information includes an error, it is possible to prevent the cut surfaces of the invoice cuts from becoming uneven. In addition, the finish accuracy of the invoice cuts can be improved.

[0076] (Paper sorting process during the execution of the corner-back formation process) Next, with reference to FIG. 8, the paper discrimination process during the execution of the corner-back formation process will be described. Since the processes up to S21 to S23 are the same as the processes up to S1 to S3 in FIG. 6, the description thereof will be omitted.

[0077] After the paper error is calculated in step S23, the error calculation unit 124 calculates the integrated error by integrating the paper errors (S24). Next, the error calculation unit 124 determines whether the calculation of the paper errors for the paper bundle to be subjected to the corner-back formation has been completed (S25). If it is determined in S25 that the calculation of the paper errors for the paper bundle has not been completed (S25 is NO), the process returns to step S21.

[0078] On the other hand, if it is determined in S25 that the calculation of the paper errors for the paper bundle has been completed (S25 is YES), the paper sorting unit 125 refers to the integrated error calculated in step S24 (S26). Next, the paper sorting unit 125 determines whether the integrated error for the paper bundle is within the error tolerance range (S27).

[0079] According to the post-processing paper information correspondence table 231 shown in FIG. 4, the width of the error tolerance range associated with the post-processing of "corner back formation" is such that the "paper size" is "B (wide)", and the "paper thickness" and "basis weight" are "A (narrow)". Therefore, the paper selection unit 125 makes the determination in step S27 by referring to the error tolerance range in the error tolerance range information table 232 corresponding to these.

[0080] In step S27, if it is determined that the integrated error of the paper bundle is within the error tolerance range (S27 is YES), the paper selection unit 125 instructs the bookbinding processing unit 143 to perform the corner back formation process (S28).

[0081] On the other hand, in step S27, if it is determined that the integrated error of the paper bundle is within or outside the error tolerance range (S27 is NO), the paper selection unit 125 instructs the bookbinding processing unit 143 not to perform the corner back formation process. Further, the paper selection unit 125 notifies that the corner back formation process is not performed (S29). After the processing of S28 or S29, the paper selection process ends.

[0082] According to the above-described embodiment, the user side sets an appropriate range within the error tolerance range. By this setting, even when the paper information includes an error, it is possible to prevent the back part of the corner back from becoming uneven, and it is possible to improve the finishing accuracy of the corner back formation.

[0083] (Paper selection process during card cutting process) Next, with reference to FIG. 9, the paper discrimination process during the card cutting process will be described. The processes up to S31 to S33 are the same as the processes up to S1 to S3 in FIG. 6, so the description thereof will be omitted.

[0084] After the paper error is calculated in step S33, the paper selection unit 125 determines whether the paper error calculated in S33 is within the error tolerance range (S34).

[0085] According to the post-processing paper information correspondence table 231 shown in FIG. 4, the width of the error tolerance range associated with the post-processing of "card cutting" is such that the "paper size" is "A (narrowed)", and the "paper thickness" and "basis weight" are "B (widened)". Therefore, the paper selection unit 125 makes the determination in S34 by referring to the error tolerance range in the error tolerance range information table 232 corresponding to these.

[0086] In step S34, if it is determined that the paper error is within the error tolerance range (S34 is YES), the paper selection unit 125 instructs the image forming unit 131 of the image forming apparatus 13 to perform image forming processing (S35). Next, the paper selection unit 125 instructs the cutting processing unit 142 to perform card cutting processing (S36).

[0087] On the other hand, in step S34, if it is determined that the paper error is outside the error tolerance range (S34 is NO), the paper selection unit 125 gives an instruction to purge the paper from the purge tray 126 (S37). After the processing of S36 or S37, the paper selection process ends.

[0088] According to the above-described embodiment, an appropriate range within the error tolerance range is set on the user side. By this setting, even when the paper information includes an error, it is possible to prevent the occurrence of a situation where a position other than the planned cutting position is cut during card cutting. In addition, the finishing accuracy of card cutting can be improved.

[0089] Further, in the above-described embodiment, for example, it is also possible to perform another post-processing such as folding on a plurality of papers with the same size among the papers outside the error tolerance range discharged from the purge tray 126 selected by the paper selection unit 125. By performing such processing, the number of unusable (to be discarded) papers can be reduced.

[0090] In the above-described embodiment, an example in which the image forming system 1 includes the image forming apparatus 13 has been given. However, the present invention is not limited to this. The image forming system according to the present invention may be applied to an image processing apparatus that does not include an image forming apparatus and is configured by a paper feeding device 11, a paper reading unit 12, and a post-processing device 14.

[0091] <Second Embodiment> [Configuration of Image Processing System] Next, a second embodiment of the present invention will be described. FIG. 10 is a diagram showing a configuration example of an image processing system 100A according to the second embodiment of the present invention. As shown in FIG. 10, the image processing system 100A includes image forming systems 1A-1 to 1A-n and a data collection server 2A. The image forming systems 1A-1 to 1A-n and the data collection server 2A are communicably connected via a network N.

[0092] The image forming systems 1A-1 to 1A-n are systems that perform inspection of printed matter on which an image has been formed after forming an image on a sheet fed from a sheet feeding device 11 (see FIG. 11). In the following description, when it is not necessary to distinguish the image forming systems 1A-1 to 1A-n from each other, these are collectively referred to as "image forming system 1A". The configuration of the image forming systems 1A-1 to 1A-n will be described in detail with reference to FIG. 11 below.

[0093] The data collection server 2A is different from the data collection server 2 according to the first embodiment in that an error tolerance range storage unit 23A includes an image processing paper information correspondence table 233 instead of the post-processing paper information correspondence table 231 (see FIG. 1). Since the other configurations of the data collection server 2A are the same as those of the data collection server 2 according to the first embodiment, the description thereof will be omitted.

[0094] [Configuration of Image Forming System] Next, with reference to FIG. 11, the configuration of the image forming system 1A according to the present embodiment will be described. FIG. 11 is a block diagram showing a configuration example of the image forming system 1A. As shown in FIG. 11, the image forming system 1 includes a paper feeding device 11, a paper reading unit 12, an image forming device 13, and an inspection device 15. Since the configurations of the paper feeding device 11, the paper reading unit 12, and the image forming device 13 are the same as those of these devices shown in FIG. 2, the description thereof is omitted.

[0095] The inspection device 15 includes an inspection unit 151, a paper discharge tray 152, and a purge tray 153. The inspection unit 151 inspects the quality of a printed matter by comparing a read image of the printed matter on which an image is formed by the image forming device 13 with a reference image composed of a manuscript image or the like included in a print job. The paper discharge tray 152 is a tray where the printed matter determined to be a good product by the inspection unit 151 is discharged, and the purge tray 153 is a tray where the printed matter determined to be a defective product by the inspection unit 151 is purged. Note that depending on the print job, inspection by the inspection device 15 may not be performed.

[0096] (Configuration of Image Processing Paper Information Correspondence Table) Next, with reference to FIG. 12, the configuration of the image processing paper information correspondence table 233 will be described. FIG. 12 is a diagram showing a configuration example of the image processing paper information correspondence table 233.

[0097] As shown in FIG. 12, in the image processing paper information correspondence table 233, for each of the image processes of "duplex printing", "sample printing (for layout confirmation)", "sample printing (for image quality confirmation)", "special printing", and "automatic inspection", an identifier of "A" or "B" indicating the type and range width of the error tolerance range for the paper information is associated. Also in the example shown in FIG. 12, similar to the example shown in FIG. 4, the paper information is provided with "paper size", "paper thickness", and "basis weight".

[0098] For example, for "double-sided printing" in image processing, "A (narrow)" is associated with "paper size", and "B (wide or not set)" is associated with "paper thickness" and "basis weight", respectively. That is, when the type of image processing is "double-sided printing", the paper selection unit 125 (see FIG. 11) applies the error tolerance range of "A (narrow)" to paper selection based on "paper size". On the other hand, in paper selection based on "paper thickness" or "basis weight", the error tolerance range of "B (wide)" is applied, or the error tolerance range is not set, that is, paper selection based on the error tolerance range is not performed.

[0099] Here, the reason why the error tolerance range of the paper size should be set to "A (narrow)" when double-sided printing is performed will be described with reference to FIG. 13. FIG. 13 is a diagram showing an example of the deviation between the surface-formed image and the back-formed image that may occur based on the error of the paper size.

[0100] When double-sided printing is executed by the image forming apparatus 13, the image forming position is controlled by controlling the image forming position from the leading edge side of the paper, regardless of whether the image is formed on the front or back surface. And when image formation is performed on a plurality of sheets of paper, if the paper size is always constant (the paper sizes of all the plurality of sheets of paper are the same), the formation positions of the surface-formed image and the back-formed image coincide on the front and back of the paper by controlling the image forming position based on a predetermined adjustment amount on each of the front and back surfaces.

[0101] On the other hand, when the paper size includes an error, even if the control of the image formation position is performed based on a predetermined adjustment amount, the formation position of the front surface formed image and the formation position of the back surface formed image will be misaligned between the front and back surfaces. Fig. 13 shows an example when the paper size is larger than the size defined by the reference value. In this case, the back surface adjustment value for controlling the formation position of the back surface formed image indicated by the fine broken line rectangle frame is closer to the right end side of the paper in the figure than the position where the back surface formed image should originally be formed, that is, the same position as the front surface formed image indicated by the thick line. As a result, a deviation occurs between the formation position of the front surface formed image and the formation position of the back surface formed image.

[0102] On the other hand, when the paper size is smaller than the size defined by the reference value, the back surface adjustment value is closer to the center side of the paper than the position where the back surface formed image should originally be formed, that is, the same position as the front surface formed image indicated by the thick broken line. Also in this case, a deviation occurs between the formation position of the front surface formed image and the formation position of the back surface formed image.

[0103] Therefore, when double-sided printing is performed, it is necessary to strictly determine the presence or absence of an error in the paper size in order to match the formation position of the front surface formed image and the formation position of the back surface formed image. For this reason, in the present embodiment, as shown in the image processing paper information correspondence table 233 of Fig. 12, for "double-sided printing", the error tolerance range of "paper size" is set to "A (narrowed)".

[0104] Returning to Fig. 12 to continue the explanation. For "special printing" and "automatic inspection" in the image processing paper information correspondence table 233, the error tolerance ranges of all paper information of "paper size", "paper thickness", and "basis weight" are set to "A (narrowed)". Since the special toner used for special printing is costly, it is required to minimize possible printing failures.

[0105] In addition, in the printed matter inspected by the inspection device 15, it is desirable to reduce the possibility of a defective determination due to an error in the paper information of the paper at the stage before the inspection by the inspection device 15 is carried out. Therefore, for "special printing" and "automatic inspection", the error tolerance ranges of all paper information of "paper size", "paper thickness", and "basis weight" are set to "A (narrow)".

[0106] (Paper sorting process during double-sided printing) Next, with reference to FIG. 14, the paper discrimination process during double-sided printing will be described. FIG. 14 is a flowchart showing an example of the procedure of the paper discrimination process during double-sided printing. Since the processes from S41 to S43 in FIG. 14 are the same as the processes from S1 to S3 in FIG. 6, the description thereof will be omitted.

[0107] After the paper error is calculated in step S43, the paper sorting unit 125 (see FIG. 11) determines whether the paper error calculated in S43 is within the error tolerance range (S44).

[0108] According to the image processing paper information correspondence table 233 shown in FIG. 12, the width of the error tolerance range associated with "double-sided printing" is "A (narrow)" for "paper size", and "B (wide)" for "paper thickness" and "basis weight". Therefore, the paper sorting unit 125 makes the determination of S44 with reference to the error tolerance range in the error tolerance range information table 232 corresponding thereto.

[0109] In step S44, when it is determined that the paper error is within the error tolerance range (S44 is YES), the paper sorting unit 125 instructs the image forming unit 131 of the image forming apparatus 13 to perform double-sided printing (S45). On the other hand, in step S44, when it is determined that the paper error is outside the error tolerance range (S44 is NO), the paper sorting unit 125 purges the paper from the purge tray 153 (see FIG. 11) as paper not subject to image forming processing (S46). After the process of S45 or S46, the paper sorting process ends.

[0110] According to the above-described embodiment, the user side sets an appropriate range within the error tolerance. By doing so, even when the paper information includes an error, it is possible to prevent a deviation from occurring between the formation position of the front surface formed image and the formation position of the back surface formed image. Therefore, the finish accuracy of double-sided printing can be improved.

[0111] (Paper sorting process during special printing) Next, with reference to FIG. 15, the paper discrimination process during special printing will be described. FIG. 15 is a flowchart showing an example of the procedure of the paper discrimination process during special printing. Since the processes from S51 to S53 in FIG. 15 are the same as the processes from S1 to S3 in FIG. 6, the description thereof will be omitted.

[0112] After the paper error is calculated in step S53, the paper sorting unit 125 determines whether the paper error calculated in S53 is within the error tolerance (S54).

[0113] According to the image processing paper information correspondence table 233 shown in FIG. 12, for all of "paper size", "paper thickness", and "basis weight", "A (narrow)" is set as the width of the error tolerance associated with "special printing". Therefore, the paper sorting unit 125 makes the determination in step S54 with reference to the error tolerance in the error tolerance information table 232 corresponding thereto.

[0114] In step S54, when it is determined that the paper error is within the error tolerance (S54 is YES), the paper sorting unit 125 instructs the image forming unit 131 of the image forming apparatus 13 to perform special printing (S55). On the other hand, in step S54, when it is determined that the paper error is outside the error tolerance (S54 is NO), the paper sorting unit 125 purges the paper from the purge tray 153 (S56). After the process of S55 or S56, the paper sorting process ends.

[0115] According to the above-described embodiment, the user sets an appropriate range within the error tolerance. By this setting, it is possible to prevent a decrease in print quality based on an error included in the sheet information of the sheet when special printing is performed.

[0116] (Sheet sorting process during automatic inspection) Next, with reference to FIG. 16, the sheet discrimination process during automatic inspection will be described. FIG. 16 is a flowchart showing an example of the procedure of the sheet discrimination process during automatic inspection. Since the processes from S61 to S63 in FIG. 16 are the same as the processes from S1 to S3 in FIG. 6, the description thereof will be omitted.

[0117] After the sheet error is calculated in step S63, the sheet sorting unit 125 determines whether the sheet error calculated in S63 is within the error tolerance (S64).

[0118] According to the image processing sheet information correspondence table 233 shown in FIG. 12, for all of "sheet size", "paper thickness", and "basis weight", "A (narrow)" is set as the width of the error tolerance associated with "automatic inspection". Therefore, the sheet sorting unit 125 makes the determination in step S64 with reference to the error tolerance in the error tolerance information table 232 corresponding thereto.

[0119] In step S64, if it is determined that the sheet error is within the error tolerance (S64 is YES), the sheet sorting unit 125 instructs the image forming unit 131 of the image forming apparatus 13 to perform image formation. Further, the sheet sorting unit 125 instructs the inspection unit 151 of the inspection apparatus 15 to perform an inspection process (S65). On the other hand, in step S64, if it is determined that the sheet error is outside the error tolerance (S64 is NO), the sheet sorting unit 125 purges the sheet from the purge tray 153 as a sheet not subject to inspection (S66). After the process of S65 or S66, the sheet sorting process ends.

[0120] According to the above-described embodiment, the user sets an appropriate range within the error tolerance. By this setting, it is possible to prevent a decrease in print quality based on an error included in the sheet information of the sheet when automatic inspection is performed by the inspection device 15.

[0121] (Sheet selection process during sample printing) Next, with reference to FIG. 17, the sheet discrimination process during sample printing will be described. FIG. 17 is a flowchart showing an example of the procedure of the sheet discrimination process during sample printing. Sample printing includes sample printing for layout confirmation, sample printing for image quality confirmation, and the like. Since the processes from S71 to S73 are the same as the processes from S1 to S3 in FIG. 6, the description thereof will be omitted.

[0122] After the sheet error is calculated in step S73, the sheet selection unit 125 determines whether or not the error detection setting based on the error tolerance is ON (S74). If it is determined in step S74 that the error detection setting based on the error tolerance is OFF (S74 is NO), the sheet selection unit 125 instructs the image forming unit 131 of the image forming apparatus 13 to perform image formation (S75).

[0123] On the other hand, if it is determined in step S74 that the error detection setting based on the error tolerance is ON (S74 is YES), the sheet selection unit 125 determines whether or not the sheet error calculated in S72 is within the error tolerance (S76).

[0124] According to the image processing sheet information correspondence table 233 shown in FIG. 12, the width of the error tolerance associated with each of "sample printing (for layout confirmation)" and "sample printing (for image quality confirmation)" is set to "B (wider)" for all of "sheet size", "paper thickness", and "basis weight". Therefore, the sheet selection unit 125 makes the determination in step S76 with reference to the error tolerance in the error tolerance information table 232 corresponding thereto.

[0125] In step S76, when it is determined that the paper error is within the error tolerance range (S76 is YES), the paper sorting unit 125 performs the process of S75. That is, the image forming unit 131 of the image forming apparatus 13 is caused to perform image formation. On the other hand, in step S76, when it is determined that the paper error is outside the error tolerance range (S76 is NO), the paper sorting unit 125 purges the paper from the purge tray 153 (S77). After the process of S76 or S77, the paper sorting process ends.

[0126] In the above-described embodiment, at the time of performing sample printing, error determination based on the error tolerance range is not performed, or error determination based on a "loose" error tolerance range is performed. Therefore, according to the present embodiment, it is possible to prevent unnecessary error determination and error determination with an unnecessary (high) determination level, that is, error determination using a narrow error tolerance range, at the time of performing sample printing where the quality of the printed matter is not questioned. As a result, the printing time at the time of performing sample printing can be minimized, and the productivity of the image forming system 1A can be improved.

[0127] Also, in each of the above-described embodiments, since information on the error tolerance range set by the plurality of image processing systems 100 or 100A is stored in the data collection server 2, a company or the like that operates the data collection server 2 can grasp the tendency of paper errors for each printing company or by region or country. Therefore, for example, a manufacturer of an image forming system or the like can also set a reference value for paper sorting according to the tendency by region or country based on the information on the error tolerance range collected by the data collection server 2 in the image forming system.

[0128] Note that in each of the above-described embodiments, each functional unit (error tolerance range setting unit 21, reference value information storage unit 22, error tolerance range information storage unit 23, error tolerance range information storage unit 23A) included in the data collection server 2 may be provided within the image forming system 1 or 1A.

[0129] In addition, each of the above-described embodiments has described the configurations of the apparatus and the system in detail and specifically for the purpose of easily explaining the present invention, and is not necessarily limited to those having all the configurations described.

[0130] Also, the control lines or information lines shown by solid lines in FIGS. 1 and 10 indicate those considered necessary for explanation, and do not necessarily show all the control lines and information lines on the product. In practice, it may be considered that almost all the components are interconnected.

[0131] In addition, in this specification, the processing steps describing the time-series processing include not only the processing performed in time series in accordance with the described order, but also the processing that is not necessarily processed in time series, and can be executed in parallel or individually (for example, parallel processing or object-based processing).

Explanation of Reference Numerals

[0132] 1, 1A... Image forming system, 2, 2A... Data collection server, 11... Paper feeding device, 12... Paper reading unit, 13... Image forming device, 14... Post-processing device, 15... Inspection device, 21... Error tolerance setting unit, 22... Reference value information storage unit, 23, 23A... Error tolerance range information storage unit, 100... Image processing system, 100A... Image processing system, 121... Paper size detection unit, 122... Basis weight detection unit, 123... Paper thickness detection unit, 124... Error calculation unit, 125... Paper sorting unit, 126... Purge tray, 131... Image forming unit, 132... Paper inversion unit, 141... Stapling processing unit, 142... Cutting processing unit, 143... Bookbinding processing unit, 151... Inspection unit, 152... Discharge tray, 153... Purge tray, 231... Post-processing paper information correspondence table, 232... Error tolerance range information table, 233... Image processing paper information correspondence table

Claims

1. An error tolerance range information storage unit that stores information on an error tolerance range with respect to a reference value of recording medium information indicating characteristics of a recording medium; A recording medium selection unit that, when an error in the recording medium information acquired by reading the recording medium by a recording medium reading unit is a value outside the error tolerance range, selects the recording medium associated with the recording medium information having the error outside the error tolerance range as a recording medium not subject to image forming processing, post-processing, or inspection processing; An image processing system.

2. The error tolerance range is indicated by at least one of a minimum tolerance value and a maximum tolerance value with respect to the reference value, or by an error tolerance ratio with respect to the reference value. The image processing system according to claim 1.

3. The recording medium information includes at least one or more of the size, paper thickness, and basis weight of the recording medium. The image processing system according to claim 2.

4. The recording medium selection unit performs control to discharge the recording medium selected as a recording medium not subject to the image forming processing, the post-processing, or the inspection processing from a purge tray. The image processing system according to claim 3.

5. The recording medium selection unit instructs the execution of the image forming processing, the post-processing, or the inspection processing on the recording medium for which the error is within the error tolerance range. The image processing system according to claim 3.

6. A range corresponding to the type of the image processing or the type of the post-processing is set in the error tolerance range. The image processing system according to claim 5.

7. The image processing system further includes an error calculation unit that calculates an error from the reference value of the recording medium information. When the post-processing is performed on a stack of paper consisting of a plurality of recording media, the error calculation unit calculates an integrated error for the stack of paper, The recording medium selection unit selects the recording media by comparing the integrated error with the error tolerance range. The image processing system according to claim 6.

8. A procedure for storing information on an allowable error range with respect to a reference value of recording medium information indicating the characteristics of a recording medium in an error tolerance range information storage unit, and When the error of the recording medium information obtained by reading the recording medium is a value outside the error tolerance range, a procedure for selecting the recording medium associated with the recording medium information of the error outside the error tolerance range as a recording medium not subject to image formation processing, post-processing, or inspection processing, including A recording medium selection method.

9. A procedure for storing information on an allowable error range with respect to a reference value of recording medium information indicating the characteristics of a recording medium in an error tolerance range information storage unit, and When the error of the recording medium information obtained by reading the recording medium is a value outside the error tolerance range, a procedure for causing a computer to execute a procedure for selecting the recording medium associated with the recording medium information of the error outside the error tolerance range as a recording medium not subject to image formation processing, post-processing, or inspection processing, for A program.

Images