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Printing system, inspection method, and medium

A technology of a printing system and an inspection method, applied in the directions of printing devices, printing, typewriters, etc., can solve problems such as sheet defects, complicated paper jam handling operations, etc., and achieve the effect of improving productivity

Pending Publication Date: 2021-12-07
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Depending on the position of the jam, a sheet with the same printed content may be inspected twice, which results in inspection using the reference image in a misaligned state and the captured image, and the sheet is judged to be defective
There is a problem that, in the case of a paper jam, the user needs to confirm the removed jammed paper and the image on the last sheet on the discharge tray to judge whether it is necessary to set the re-inspection start page for the sheet inspection device, and This complicates jam handling operations

Method used

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  • Printing system, inspection method, and medium
  • Printing system, inspection method, and medium
  • Printing system, inspection method, and medium

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0083] This embodiment will describe the use of the inspection device 108 Figure 8 Check the status management table 800 shown in to automatically calculate the check recovery start page in the event of a paper jam.

[0084] Paper Jam Handling by Detector

[0085] Figure 6 is a flowchart showing operations performed by the inspection device 108 in the event of a paper jam. Specifically, it is shown in Figure 4 Details of the operations performed in step S409 of the flowchart.

[0086] In step S601 , the CPU 226 of the inspection device 108 issues an inspection suspension instruction to the inspection device I / F 215 via the inspection unit I / F 231 , and controls the inspection unit 106 and the inspection device 108 to stop the inspection.

[0087] Next, in step S602 , the CPU 226 waits until all jammed sheets in the printing apparatus 101 are processed (for example, removed) and paper remaining in the apparatus is discharged to the outside of the apparatus. In a case wh...

no. 2 example

[0132] The first embodiment describes that the checking device 108 uses the checking state management table 800 for calculation. As another example, it is conceivable that the inspection device 108 automatically calculates the inspection recovery start page when a paper jam occurs without using Figure 8 Check status management table 800 is shown. Specific examples will be described below. The processing on the inspection unit 106 side is the same as that described in the first embodiment Figure 7 , so it will not be described here.

[0133] Figure 10 is a flowchart showing operations performed by the inspection device 108 when a paper jam occurs. Specifically, shown in Figure 4 Details of the operations performed in step S409 of the flowchart.

[0134] Steps S1001 and S1002 are the same as steps S601 and S602, so they will not be described here.

[0135] In step S1003, the CPU 226 calculates a check recovery start page from the checked pages and ejected pages among ...

no. 3 example

[0155] The first and second embodiments describe the inspection device 108 as automatically calculating an inspection recovery start page when a paper jam occurs. As another example, it is conceivable that the inspection unit 106 automatically calculates the inspection recovery start page when a paper jam occurs.

[0156] This embodiment will describe the use of the checking unit 106 Figure 8 Check the status management table 800 shown in to automatically calculate the check recovery start page when a paper jam occurs. In the present embodiment, the checking unit 106 calculates the checking recovery start page, and notifies the checking device 108 of the calculation result.

[0157] Jam Handling by Check Unit

[0158] Figure 13 is a flowchart showing operations performed by the printing apparatus 101 and the inspection unit 106 when a paper jam occurs. Specifically, shown in Figure 5 Details of the operations performed in step S507 of the flowchart in .

[0159] Steps...

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PUM

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Abstract

The invention provides a printing system, an inspection method, and a medium. The system includes: a printing member (101) for forming an image on a sheet conveyed along a conveyance path; inspection means (106, 108) for inspecting an image formed on the sheet conveyed along the conveyance path by comparing the image with a reference image, and for recording order information of the inspected sheets and order information of the correctly discharged sheets; and a control unit configured to, in a case where a jam occurs in the conveyance path of the sheet, control the inspection member to restart inspection from the first sheet recorded as not yet inspected or not correctly discharged after restart of printing.

Description

technical field [0001] The present invention relates to a printing system, an inspection method, and a medium for inspecting the quality of printed items. Background technique [0002] There is known an inspection device that reads a printed item printed by a printing device and checks the quality of the printed item. The inspection unit detects image defects such as smudges and missing prints, text errors, and barcode quality. Finished products in which such a defect is detected are separated from non-defective printed items by, for example, changing the discharge destination. [0003] In the case of inspecting a sheet being conveyed by an inspection unit provided in the sheet conveyance path on which the sheet is conveyed, in the sheet conveyance path downstream from the inspection unit in the sheet conveyance direction (hereinafter simply referred to as "downstream side") Sheet jam. In this case, it is judged by the inspection device that the sheet that has been inspec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J3/44B41J11/00B41J29/00B41J29/393G06T7/00
CPCB41J3/445B41J29/00B41J29/393B41J11/006G06T7/001G06T2207/30144B41J29/38G03G15/5062G03G15/70G06F3/121G06F3/1234
Inventor 木村雄介
Owner CANON KK