Printing System Conveyance Path Switching for Defect Separation
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Solution Overview
Problem
Existing printing systems face challenges in controlling the discharge destination of printed documents efficiently, particularly when a printed document is determined to be defective, as the distance between the inspection apparatus and the discharge destination may be too great, leading to delayed intervention and potential mixing of defective and non-defective sheets.
Innovation Solution
A printing system that includes a printing unit, a determination unit for comparing prestored reference images with read images, and a switching unit to switch the conveyance path based on the inspection result, allowing for timely and appropriate routing of defective sheets to a separate discharge destination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the discharge destination is controlled based on inspection results, then defective sheets can be separated from non-defective sheets, but the control becomes too late when the distance between inspection apparatus and discharge destination is relatively close
Solution Approach 1:
The system performs preliminary actions by predicting the inspection result before the sheet reaches the inspection apparatus, and by determining the discharge destination in advance based on this prediction. This allows the conveyance path switching to be prepared beforehand, ensuring timely and accurate separation of defective sheets without delay.
2Loss of time
If the distance between inspection apparatus and discharge destination is reduced for timely control, then response time improves, but the risk of mixing defective and non-defective sheets increases due to limited space for path switching
Solution Approach 1:
The conveyance path switching is performed in advance based on predicted inspection results, allowing the system to prepare the discharge path before the sheet arrives at the inspection apparatus. This eliminates the need for large distances while maintaining reliable separation accuracy.
3Reliability
If the conveyance path switching is performed after inspection, then accurate separation is achieved, but the system becomes too slow to prevent mixing when sheets are conveyed quickly
Solution Approach 1:
The system performs preliminary prediction of inspection results and determines discharge destinations before sheets reach the inspection apparatus. This allows conveyance path switching to be prepared in advance, enabling high-speed sheet conveyance while maintaining accurate separation of defective and non-defective sheets.
Solution Approach 2:
The system uses feedback from predicted inspection results to dynamically control the conveyance path switching. By continuously monitoring and adjusting the discharge destination based on prediction outcomes, the system achieves both high-speed processing and accurate separation.
Data Source
AI summary
A printing system includes a printing unit, a determination unit, and a switching unit. The printing unit prints an image on a recording medium. The determination unit compares a prestored reference image and a read image corresponding to a reading result of a printed document in which the image is printed on the recording medium and determines whether a result of the comparison satisfies a predetermined condition. The switching unit switches a discharge destination of the recording medium based on a result of the determination. The switching unit switches a conveyance path of the recording medium based on whether the determination is performed.