Image Forming System Sheet Size Determination
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Solution Overview
Problem
In image forming systems, determining whether post-processing can be performed correctly is challenging when the sheet size changes due to cutting or other processes, leading to potential jams or incorrect job execution.
Innovation Solution
An image forming system with a control unit that acquires the feeding sheet size, calculates the sheet size after first post-processing, and determines if set post-processings can be performed based on compatibility with the second post-processing unit, allowing for accurate determination and preventing incorrect processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sheet size determination is based on feed tray information alone, then the determination process is simple, but incorrect determination occurs when sheet size changes due to cutting post-processing
Solution Approach 1:
The control unit performs preliminary calculation of the sheet size after first post-processing before determining whether second post-processing can be performed. This preliminary action ensures that the determination is based on the actual sheet size that will be presented to the second post-processing unit, not the original feed tray size, thereby resolving the contradiction between simple determination process and accurate sheet size determination.
2Productivity
If post-processing determination is performed without calculating size changes, then the processing speed is fast, but jams occur due to incorrect determination
Solution Approach 1:
The control unit performs preliminary calculation of the sheet size after first post-processing (such as cutting) before determining whether second post-processing can be performed. This ensures that the determination is based on the actual sheet size that will be presented to the second post-processing unit, preventing jams and incorrect processing while maintaining efficient operation.
Solution Approach 2:
The control unit uses feedback from the first post-processing unit about the actual sheet size after cutting to make the determination about whether second post-processing can be performed. This feedback mechanism ensures that the determination is based on real actual conditions rather than theoretical values, resolving the contradiction between fast processing and reliable execution.
3Ease of operation
If the system checks only feed tray sheet size information, then the system operation is simple, but incorrect jobs are executed or jams occur
Solution Approach 1:
The control unit performs preliminary calculation of the sheet size after first post-processing before determining whether second post-processing can be performed. This ensures that the determination is based on the actual sheet size that will be presented to the second post-processing unit, preventing jams and incorrect processing while maintaining efficient operation.
Data Source
AI summary
Provided is an image forming system including a feed tray, a printer unit, a first post-processing unit that performs first post-processing accompanying at least a change in a sheet size, a second post-processing unit that performs second post-processing other than the first post-processing, and a control unit that controls setting and performing feeding, outputting, and the post-processing of the sheet. In a case where the first post-processing and the second post-processing are set, the control unit acquires a feeding sheet size of a sheet fed from the feed tray, calculates a sheet size after the first post-processing based on the acquired feeding sheet size, and determines whether the set post-processings can be performed based on the calculated sheet size and a sheet size that can be processed by the second post-processing.