JP2008068434A - Printed matter inspecting equipment, printed matter defect removing equipment, printed matter inspecting method, printed matter defect removing method and printed matter inspecting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printed matter inspecting system and others which enable a retrieval of a defective spot on the basis of an inspection result by increasing no working burden even when a form of printed matter changes between the time of inspection and the time of repair of a defect. <P>SOLUTION: The printed matter inspecting system 1 has inspecting equipment 2, defect removing equipment 20 and a control part 30. The inspecting equipment 2 puts a mark 13 at prescribed intervals on the lateral end portion of the printed matter 10. The inspecting equipment 2 acquires an inspective image by picking up the image of the printed matter 10, detects a defect on the basis of the inspective image and holds the position of detection of the defect as the inspection result. The defect removing equipment 20 stops running of the printed matter 10 at a position where the position of detection of the defect and the position indicated by the mark 13 coincide with each other, and performs cutting and pasting of an area of removal including the defect. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a printed matter inspection system for inspecting a printed matter. More specifically, the present invention relates to a printed matter inspection system for inspecting a printed matter printed on a winding material (roll paper or web-like film material).

  Conventionally, a printed matter inspection apparatus performs defect detection by comparing a reference image obtained from a non-defective printed matter with an inspection image obtained from a printed matter to be inspected. Also, a printed matter inspection apparatus that inspects a printed matter of a winding material (roll paper or web-like film material) directly marks the inspection result on a printed matter by inserting a magnetic tape or an IC tag (for example, [Patent Reference 1]).

Japanese Patent Laid-Open No. 2004-62015

However, the conventional printed matter inspection apparatus has a problem in that the winding length data held as the inspection result and the marking position do not coincide with each other because the defective portion is cut and bonded. In addition, the tension of the winding material is different between the unwinding process at the time of inspection and the unwinding process at the time of defect removal, and the winding length data retained as the inspection result does not match the marking position due to the expansion and contraction of the winding material itself. There is.
In addition, even if a defect is detected, if it is not marked as a minor defect at first, it is difficult to search for the defective part even if it is later found to be a serious defect.

  The present invention has been made in view of the above problems, and is based on the inspection result without increasing the work load even when the form of the printed matter changes between the inspection and the defect removal. It is an object of the present invention to provide a printed matter inspection system or the like that can search for a defective portion.

  In order to achieve the above-described object, the first invention is a printed material inspection apparatus that inspects the printed material based on an image obtained by imaging a traveling printed material, in the traveling direction with respect to a predetermined portion of the printed material. Marking means for attaching marks indicating positions at predetermined intervals, an imaging unit for capturing an inspection image by capturing the printed matter, a defect detection means for detecting a defect based on the inspection image, and a detection position of the defect And a defect detection position holding unit for holding the printed matter inspection apparatus.

  The printed matter inspection apparatus is an apparatus that inspects a printed matter printed on a winding material. The winding material is, for example, roll paper or a web-like film material. The printed matter inspection apparatus attaches a mark indicating the position of the winding length or the like to the side edge of the printed matter, captures the printed matter to obtain an inspection image, detects a defect based on the inspection image, and determines the detection position of the defect. Hold. A printed matter inspection apparatus prints or prints a mark directly on a printed matter using, for example, a laser marker or an inkjet head.

  In the first invention, since the defect detection position held as the inspection result and the winding length marked on the printed matter are associated with each other, the form of the printed matter is changed between the inspection and the defect removal due to expansion, contraction, cutting, and bonding. Even in this case, it is possible to search for and identify a defective portion based on the inspection result without increasing the work load.

  A second invention is a printed product defect removing apparatus that searches for and removes defects from a traveling printed product, and includes a defect detection position acquisition unit that acquires a detection position of the defect, and a mark that reads a mark attached to the printed product Reading means; stopping means for stopping the printed material at a position where the detected position of the defect coincides with the position indicated by the mark; and defect removing means for removing the defect from the printed material. This is a feature of a printed matter removing apparatus.

  The printed product defect removing device reads the mark attached to the printed material, stops the travel of the printed material at a position where the detection position of the defect indicated by the inspection result matches the position indicated by the mark, and performs cutting and pasting, etc. Remove defects from.

  2nd invention is invention regarding the printed matter defect removal apparatus which removes a defect with respect to the printed matter inspected by the printed matter inspection apparatus of 1st invention.

  According to a third aspect of the present invention, there is provided a printed matter inspection apparatus that inspects the printed matter based on an image obtained by imaging a traveling printed matter, and a printed matter defect removal apparatus that rewinds the inspected printed matter and searches for and removes the defect. The printed matter inspection system includes a marking unit that attaches marks indicating positions at predetermined intervals in the traveling direction with respect to a predetermined portion of the printed matter, and captures an inspection image by imaging the printed matter. An image pickup unit to be acquired; defect detection means for detecting a defect based on the inspection image; and defect detection position holding means for holding a detection position of the defect. A defect detection position acquisition unit that acquires a detection position, a mark reading unit that reads a mark attached to the printed matter, and a detection position of the defect and a position indicated by the mark coincide with each other. And stopping means for stopping the travel of the printed material in position, a printed matter inspection system characterized by comprising a defect removing means for removing the defect from the printed material.

  According to a third aspect of the present invention, there is provided a printed matter comprising: a printed matter inspection apparatus that inspects the printed matter based on an image obtained by imaging the traveling printed matter; The invention relates to an inspection system.

  A fourth invention is a printed matter inspection method for inspecting the printed matter based on an image obtained by imaging a traveling printed matter, wherein marks indicating positions at predetermined intervals in the traveling direction with respect to a predetermined portion of the printed matter are provided. A marking step for attaching, an imaging step for imaging the printed matter to acquire an inspection image, a defect detection step for detecting a defect based on the inspection image, and a defect detection position holding step for holding the detection position of the defect And a printed matter inspection method.

  4th invention is invention regarding the printed matter inspection method which inspects printed matter based on the image which imaged the printed matter which drive | works.

  5th invention is the printed matter defect removal method which searches for and removes a defect from the printed matter which travels, The defect detection position acquisition step which acquires the detection position of the said defect, The mark which reads the mark attached | subjected to the said printed matter A reading step; a stopping step for stopping the travel of the printed material at a position where a position where the defect is detected coincides with a position indicated by the mark; and a defect removing step for removing the defect from the printed material. The feature is a printed matter defect removing method.

  5th invention is invention regarding the printed matter defect removal method which searches and removes a defect from the printed matter which drive | works.

  A sixth invention is a printed matter inspection method for inspecting the printed matter based on an image obtained by imaging a traveling printed matter, rewinding the inspected printed matter, searching for the defect, and removing the defect. A marking step for attaching marks indicating positions at predetermined intervals in the traveling direction with respect to a predetermined portion, an imaging step for capturing an inspection image by capturing the printed matter, and a defect for detecting a defect based on the inspection image A detection step; a defect detection position holding step for holding the detection position of the defect; a defect detection position reading step for reading the detection position of the defect; a mark reading step for reading a mark attached to the printed matter; and A stop step of stopping the running of the printed matter at a position where the detection position and the position indicated by the mark coincide with each other; and removing the defect from the printed matter A printed matter inspection method characterized by comprising the defect removal step that, a.

  A sixth invention is an invention relating to a printed matter inspection method in which a printed matter is inspected based on an image obtained by imaging a traveling printed matter, and the inspected printed matter is rewound to search for and remove defects.

  According to the present invention, it is possible to search for a defective portion based on the inspection result without increasing the work load even when the form of the printed matter changes between the inspection time and the defect removal time. A printed matter inspection system or the like can be provided.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a printed matter inspection system and the like according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, the same reference numerals are given to components having substantially the same functional configuration, and redundant description will be omitted.

(1. Configuration of the printed matter inspection system 1)
First, the configuration of the printed matter inspection system 1 will be described with reference to FIGS. The printed matter inspection system 1 includes an inspection device 2, a defect removal device 20, and a control unit 30. In addition, the structure of the printed matter inspection system 1 of FIGS. 1-3 is an example, and can take various structures.

(1-1. Inspection device 2)
FIG. 1 is a configuration diagram of the inspection apparatus 2.
The inspection apparatus 2 is an apparatus that inspects a printed material 10 of a winding material (roll paper or web-shaped film material). The printed material 10 is unwound from the unwinding unit 6, travels within the visual field range of the imaging unit 4, and is wound on the winding unit 7. The inspection device 2 includes a marking unit 3 and an imaging unit 4.

  The marking unit 3 is a device for marking the mark 13 on the printed material 10. The marking unit 3 marks a mark 13 in a blank area (for example, a side end) other than the printed pattern 11. The mark 13 is a mark indicating the winding length of the printed material. The mark 13 is, for example, a number indicating the winding length, a scale, or a scale. The marking unit 3 prints or prints the mark 13 using, for example, a laser marker or an inkjet head.

  The imaging unit 4 is a device that acquires an image of the printed material 10. The imaging unit 4 is a camera including, for example, an optical sensor such as a CCD (Charge Coupled Device) in which light receiving elements (pixels) are arranged, a drive circuit, an imaging optical system, and the like. A color line sensor camera can be used as the imaging unit 4. It is desirable to provide a plurality of cameras.

(1-2. Defect removing apparatus 20)
FIG. 2 is a configuration diagram of the defect removal apparatus 20.
The defect removal apparatus 20 is an apparatus that removes the defect portion detected by the inspection apparatus 2 from the printed material 10. The defect removing apparatus 20 includes a cutting unit 21 and a bonding unit 22. The cutting unit 21 is a device that cuts the printed material 10. The bonding unit 22 is a device that bonds and connects the cut printed materials 10 together.

  The printed matter 10 inspected by the inspection device 2 is rewound from the unwinding unit 23, the defective portion is cut and bonded by the cutting unit 21 and the bonding unit 22, and is wound on the winding unit 24.

(1-3. Control Unit 30)
FIG. 3 is a configuration diagram of the control unit 30.
The control unit 30 is a device that performs operation control, operation instructions, image processing, and arithmetic processing of the inspection apparatus 2 and the defect removal apparatus 20. The control unit 30 is configured by connecting a CPU 31, a memory 32, a storage unit 33, a display unit 34, an input unit 35, an output unit 36, and a communication unit 37 via a system bus 38.

  The inspection apparatus 2 and the defect removal apparatus 20 load a program (application program, OS program, etc.) stored in the storage unit 33, ROM, or recording medium into the RAM of the memory 32, and perform various processes under the control of the CPU 31. Execute.

  A CPU 31 (Central Processing Unit) is a device that performs arithmetic processing (four arithmetic operations, comparison operations, etc.) and operation control of hardware and software.

  The memory 32 is a memory such as a RAM and a ROM. A RAM (Random Access Memory) stores a ROM (Read Only Memory), an OS (Operating System) program read from the storage unit 33, an application program, and the like. The RAM functions as a main memory and work area for the CPU 31.

  The memory | storage part 33 is an apparatus which memorize | stores various data, for example, is a hard disk. The storage unit 33 stores programs executed by the CPU 31, data necessary for program execution, an OS, various databases, and the like. The storage unit 33 holds a reference image 39 and inspection information 40. The reference image 39 is an image serving as an inspection reference. The inspection information 40 will be described later.

  The display unit 34 is a display device, such as a CRT monitor or a liquid crystal panel. The display unit 34 has a logic circuit (video adapter or the like) for realizing the video function of the computer.

  The input unit 35 is an input device for various data, such as a keyboard and a mouse. The output unit 36 is an output device for various data, and is, for example, a printer. Drive devices that perform data input / output with various media can also be used as the input unit 35 and the output unit 36.

The communication unit 37 is a communication control device that connects and communicates with the inspection device 2 and the defect removal device 20.
The system bus 38 is a path that mediates transmission / reception of control signals, data signals, and the like between the devices.

(2. Inspection information 40)
FIG. 4 is a diagram illustrating an aspect of the inspection information 40.
The inspection information 40 includes fields of a defect detection position 41, an inspection image 42, a determination result 43, and a cutting and bonding position 44.

The defect detection position 41 indicates a detection position of a defect detected in the inspection apparatus 2. The defect detection position 41 is, for example, a winding length “200” of the printed material 10.
The inspection image 42 indicates an image of the printed matter 10 captured by the inspection apparatus 2. The inspection image 42 has, for example, an image data file name “kensa11.jpg”. Image data may be held as the inspection image 42, or a reference destination of the image data may be held.

The determination result 43 indicates an operator determination result for the defect. The operator determines whether or not the defect detected by the inspection apparatus 2 needs to be removed based on the inspection image 42. The determination result 43 is, for example, “defective (requires removal)” “good (removal is unnecessary)”.
The cutting and bonding position 44 indicates a position where cutting and bonding are performed in the defect removing apparatus 20. The cutting bonding position 44 is, for example, a winding length “175-225” that has been cut and removed.

(3. Operation of the printed matter inspection system 1)
Next, the operation of the printed matter inspection system 1 will be described with reference to FIGS.

(3-1. Operation of Inspection Device 2)
FIG. 5 is a flowchart showing the operation of the inspection apparatus 2.
FIG. 8 shows the marking (step 102 in FIG. 5).
FIG. 9 is a diagram showing imaging and defect detection (step 103 to step 105 in FIG. 5).

The inspection apparatus 2 unwinds the printed material 10 from the unwinding unit 6 (Step 101).
The inspection device 2 marks the marks 13 at predetermined intervals in the running direction with respect to the printed matter 10 by the marking unit 3 (step 102). The inspection apparatus 2 marks the mark 13 in a blank area (for example, a side end portion) other than the printed pattern 11.
The inspection apparatus 2 captures an image of the printed pattern 11 by the imaging unit 4 and acquires an inspection image 42 (step 103). The inspection apparatus 2 reads the reference image 39 from the storage unit 33, compares the reference image 39 and the inspection image 42, and detects the defect 51 (step 104). The inspection apparatus 2 records the defect detection position 41 and the inspection image 42 related to the defect 51, updates the inspection information 40, and holds it in the storage unit 33 (step 105).
The inspection apparatus 2 winds the printed material 10 around the winding unit 7 (step 106).
The inspection apparatus 2 repeats the processing from step 101 when continuing the inspection of the printed matter 10 (NO in step 107).

  Through the above process, the inspection apparatus 2 marks the mark 13 on the side edge of the printed matter 10 at a predetermined interval, images the printed matter 10 to acquire the inspection image 42, and detects the defect 51 based on the inspection image 42. Then, the defect detection position 41 and the inspection image 42 of the inspection information 40 are updated and held.

  In addition, regarding the positional relationship and processing timing of the marking unit 3 and the imaging unit 4, the marking unit 3 and the imaging unit 4 may be provided at the same winding length so that marking and imaging are performed simultaneously. Alternatively, the imaging unit 4 may be provided after the marking unit 3 so as to perform imaging after marking. In this case, it is desirable that the defect detection position 41 of the inspection information 40 is corrected and recorded as appropriate.

(3-2. Defect determination)
FIG. 6 is a flowchart showing the operation of the control unit 30 in the defect determination.

  The control unit 30 reads the inspection information 40 and displays the inspection image 42 on the display unit 34 (step 201). The operator confirms the inspection image 42 displayed on the display unit 34 and determines whether or not the defect needs to be removed (step 202). When the determination result 43 is input via the input unit 35, the control unit 30 records the determination result 43 of the inspection information 40 and holds it in the storage unit 33 (step 203).

  Through the above process, when the inspection image 42 is displayed and the defect determination result 43 is input, the control unit 30 records the determination result 43 of the inspection information 40 and holds it in the storage unit 33.

(3-3. Defect removing apparatus 20)
FIG. 7 is a flowchart showing the operation of the defect removal apparatus 20.
FIG. 10 is a diagram showing the search and cutting of the defective part (steps 302 to 304 in FIG. 7).
FIG. 11 is a diagram showing removal and pasting of a defective portion (steps 305 to 306 in FIG. 7).

The defect removing apparatus 20 rewinds the inspected printed matter 10 from the unwinding unit 23 (step 301).
The defect removing apparatus 20 reads the inspection information 40 from the storage unit 33 (step 302). The defect removal apparatus 20 refers to the determination result 43 of the inspection information 40 and starts searching for the defect 51 that needs to be removed. The defect removal apparatus 20 collates the defect detection position 41 of the inspection information 40 with the position indicated by the mark 13. The defect removing apparatus 20 stops the rewinding of the printed material 10 at a position where the defect detection position 41 and the position indicated by the mark 13 coincide (step 303). The defect removing apparatus 20 cuts the removal region 53 including the defect 51 by the cutting unit 21 (step 304).

The defect removing apparatus 20 removes the removal region 53, and the bonded printed part 10 is bonded and joined by the bonding unit 22 (step 305). The defect removing apparatus 20 records the cutting and bonding position 44 of the inspection information 40 and holds it in the storage unit 33 (step 306).
The defect removing apparatus 20 winds the printed material 10 around the winding unit 24 (step 307).
The defect removal apparatus 20 repeats the process from step 301, when continuing defect removal (NO of step 308).

  Through the above process, the defect removal apparatus 20 stops the travel of the printed material 10 at a position where the defect detection position 41 of the inspection information 40 and the position indicated by the mark 13 coincide with each other, and cuts and removes the removal region 53 including the defect 51. Paste.

Regarding the search for the defect 51 of the printed material 10, the operator visually checks the mark 13 of the printed material 10 and stops the rewinding of the printed material 10 at the position of the mark 31 that coincides with the defect detection position 41 of the inspection information 40. Also good.
Further, the defect removing device 20 may be provided with a mark reading unit (not shown) for reading the mark 13. The defect removal apparatus 20 performs image processing on the image captured by the mark reading unit to acquire the position indicated by the mark 13, and automatically stops the rewinding of the printed material 10 at a position that coincides with the defect detection position 41. You may do it.
Moreover, the defect removal apparatus 20 may calculate the rewind amount or the stop position of the printed material 10 with reference to the defect detection position 41 and the cutting and bonding position 44 of the inspection information 40.

(4. Effects, etc.)
As described in detail above, according to the present invention, the printed matter inspection system 1 marks the winding length at a predetermined interval on the side edge portion of the printed matter and based on the winding length indicating the defect detection position held in the storage unit. The location is searched, and the printed material is stopped at the position corresponding to the winding length marked on the printed material to remove the defect.

As described above, in the printed matter inspection system 1, since the defect detection position held as the inspection result is associated with the winding length marked on the printed matter, the printed matter is obtained at the time of inspection and when the defect is removed by expansion, contraction, bonding, or the like. Even if the form of the change is made, it is possible to search for and identify the defective portion based on the inspection result without increasing the work load.
Even if a defect is detected, even if a label or the like is not attached because it is a minor defect at the beginning, the defect portion can be searched later.
In addition, although it is not always necessary to perform individual marking such as a label for each defect, a label affixing unit may be provided in the inspection apparatus, and an individual marking such as a label may be performed at a detected position for an obvious defect.

  The preferred embodiments of the printed matter inspection system and the like according to the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

Configuration diagram of inspection device 2 Configuration diagram of defect removal apparatus 20 Configuration diagram of control unit 30 The figure which shows the one aspect | mode of the test | inspection information 40 Flow chart showing operation of inspection device 2 Flow chart showing operation of control unit 30 in defect determination Flow chart showing the operation of the defect removal apparatus 20 Diagram showing marking (step 102 in FIG. 5) Diagram showing imaging and defect detection (step 103 to step 105 in FIG. 5) The figure which shows the search and cutting | disconnection of a defect location (step 302-step 304 of FIG. 7) The figure which shows the removal and bonding of a defective part (step 305-step 306 of FIG. 7)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ......... Printed product inspection system 2 ......... Inspection apparatus 3 ......... Marking part 4 ......... Imaging part 6 ......... Unwinding part 7 ...... Winding part 10 ......... Printed article 11 ......... Printed pattern 13 ......... Mark 20 ......... Defect removing device 21 ......... Cutting unit 22 ......... Bonding unit 23 ......... Unwinding unit 24 ...... Winding unit 30 ......... Control unit 31 ......... CPU
32 ......... Memory 33 ......... Storage unit 34 ......... Display unit 39 ......... Reference image 40 ......... Inspection information 41 ......... Defect detection position 42 ......... Inspection image 43 ......... Determination result 44 ... ...... Cutting position 51 ......... Defect 53 ......... Removal area

Claims (18)

A printed matter inspection apparatus that inspects the printed matter based on an image obtained by imaging a traveling printed matter,
Marking means for attaching marks indicating positions at predetermined intervals in the traveling direction with respect to a predetermined portion of the printed matter;
An imaging unit that captures the printed matter to obtain an inspection image;
A defect detection means for detecting a defect based on the inspection image;
Defect detection position holding means for holding the defect detection position;
A printed matter inspection apparatus comprising:   The printed matter inspection apparatus according to claim 1, wherein the marking unit attaches the mark to a side end portion of the printed matter.   The mark provided by the marking unit and the detection position of the defect held by the defect detection position holding unit include information about the winding length of the printed matter as position information. Print inspection device. A printed matter defect removing apparatus that searches for and removes defects from a traveling printed matter,
Defect detection position acquisition means for acquiring the detection position of the defect;
Mark reading means for reading a mark attached to the printed matter;
Stop means for stopping travel of the printed matter at a position where the detection position of the defect coincides with the position indicated by the mark;
A defect removing means for removing the defect from the printed matter;
A printed matter defect removing apparatus comprising:   The printed matter defect removing apparatus according to claim 4, wherein the defect removing unit removes the defect by cutting and bonding. A printed matter inspection system comprising: a printed matter inspection apparatus that inspects the printed matter based on an image obtained by imaging a traveling printed matter; and a printed matter defect removal apparatus that rewinds the inspected printed matter and searches for and removes the defect. And
The printed matter inspection apparatus includes:
Marking means for attaching marks indicating positions at predetermined intervals in the traveling direction with respect to a predetermined portion of the printed matter;
An imaging unit that captures the printed matter to obtain an inspection image;
A defect detection means for detecting a defect based on the inspection image;
A defect detection position holding means for holding the detection position of the defect,
The printed matter defect removing apparatus includes:
Defect detection position acquisition means for acquiring the detection position of the defect;
Mark reading means for reading a mark attached to the printed matter;
Stop means for stopping travel of the printed matter at a position where the detection position of the defect coincides with the position indicated by the mark;
A printed matter inspection system, comprising: defect removing means for removing the defect from the printed matter.   The printed matter inspection system according to claim 6, wherein the marking unit attaches the mark to a side end portion of the printed matter.   8. The mark according to claim 6, wherein the mark provided by the marking unit and the defect detection position held by the defect detection position holding unit include information about a winding length of the printed matter as position information. Print inspection system.   The printed matter inspection system according to claim 6, wherein the defect removing unit removes the defect by cutting and bonding. A printed matter inspection method for inspecting the printed matter based on an image obtained by imaging a printed matter that travels,
A marking step for attaching marks indicating positions at predetermined intervals in the traveling direction with respect to a predetermined portion of the printed matter;
An imaging step of capturing an inspection image by imaging the printed matter;
A defect detection step of detecting a defect based on the inspection image;
A defect detection position holding step for holding the detection position of the defect;
A printed matter inspection method comprising:   The printed matter inspection method according to claim 10, wherein in the marking step, the mark is attached to a side end portion of the printed matter.   The mark provided by the marking step and the detection position of the defect held in the defect detection position holding step include information about the winding length of the printed matter as position information. Print inspection method. A printed matter defect removal method that searches for and removes defects from a printed product that travels,
A defect detection position acquisition step of acquiring the detection position of the defect;
A mark reading step for reading a mark attached to the printed matter;
A stop step of stopping the printed matter at a position where the position where the defect is detected and the position indicated by the mark match;
A defect removal step of removing the defect from the printed matter;
The printed matter defect removal method characterized by comprising.   The printed matter defect removing method according to claim 13, wherein the defect removing step removes the defect by cutting and bonding. A printed matter inspection method for inspecting the printed matter based on an image obtained by imaging a traveling printed matter, searching for and removing the defect by rewinding the inspected printed matter,
A marking step for attaching marks indicating positions at predetermined intervals in the traveling direction with respect to a predetermined portion of the printed matter;
An imaging step of capturing an inspection image by imaging the printed matter;
A defect detection step of detecting a defect based on the inspection image;
A defect detection position holding step for holding the detection position of the defect;
A defect detection position reading step for reading the detection position of the defect;
A mark reading step for reading a mark attached to the printed matter;
A stop step of stopping the printed matter at a position where the position where the defect is detected and the position indicated by the mark match;
A printed matter inspection method comprising: a defect removing step of removing the defect from the printed matter.   16. The printed matter inspection method according to claim 15, wherein in the marking step, the mark is attached to a side end portion of the printed matter.   The mark provided by the marking step and the detection position of the defect held in the defect detection position holding step include information on the winding length of the printed matter as position information. Print inspection method.   The printed matter inspection method according to claim 15, wherein the defect removing step removes the defect by cutting and bonding.

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