Image Forming System Selective Tab Sheet Inspection
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Solution Overview
Problem
Conventional image forming systems exclude all tab sheets from inspection targets, leading to unnecessary exclusion of potentially defect-free sheets and misalignment of tab positions in multi-copy print jobs.
Innovation Solution
An image forming system that sets cyclic sheets used in printed products as inspection targets while excluding unused sheets from inspection, allowing for selective discharge of remaining tabs to maintain tab position alignment across copies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all tab sheets are excluded from inspection target to avoid inspection result NG by remaining tab discharge, then false defects are prevented, but tab sheets that should be inspected are incorrectly excluded
Solution Approach 1:
The inspection system segments tab sheets into two categories: those used in the current print job (to be inspected) and remaining tabs to be discharged (to be excluded from inspection). This segmentation allows the system to apply different inspection rules to different groups of sheets, ensuring that only relevant sheets are inspected while maintaining high inspection accuracy and coverage.
Solution Approach 2:
The system performs preliminary identification of which tab sheets will be used in the current print job versus which sheets will be discharged as remaining tabs. By determining the fate of each sheet before inspection, the system can pre-configured inspection targets to include only the sheets that will actually be used, preventing both false defects and missed inspections.
2Stability of the object's composition
If remaining tabs are discharged to maintain tab position alignment in multi-copy print jobs, then tab position consistency is maintained, but mismatching with reference image order occurs causing inspection result NG
Solution Approach 1:
The system extracts remaining tabs from the inspection process entirely. By identifying sheets that will be discharged as remaining tabs before inspection occurs, the system removes these sheets from the inspection target set, preventing them from causing mismatching errors with reference images while preserving tab position consistency in the printed output.
3Manufacturing precision
If tab sheets are included in inspection target to ensure quality control, then defect detection is improved, but remaining tabs cause order mismatching with reference images
Solution Approach 1:
The system performs preliminary classification of tab sheets into inspection targets and discharge targets based on the print job requirements. This advance classification simplifies the inspection target management by clearly defining which sheets require quality inspection and which sheets will be discharged, eliminating the complexity of managing mixed targets and preventing order mismatching errors.
Data Source
AI summary
An image forming system is provided. The image forming system comprises an image forming unit configured to execute a print job and form an image on a supplied sheet; and an inspection unit configured to inspect quality of the image formed in the sheet, wherein the inspection unit does not set a sheet discharged by the image forming unit without being used for the print job to a target of inspection.