Image Forming Apparatus Sheet Attribute Verification
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Solution Overview
Problem
In image forming apparatuses, switching between feeding stages for original and duplicate copies can result in printed products with truncated images or excessive margins due to mismatched sheet sizes, leading to undesired output.
Innovation Solution
An image forming apparatus with a control unit that stops the feeding operation when the designated sheet attributes in a job differ from the attributes set in the feeding stage, ensuring appropriate printing by matching sheet sizes and types for each copy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sheet attributes are not verified before printing, then printing operation can proceed without interruption, but printed products may have truncated images or excessive margins due to sheet size mismatch
Solution Approach 1:
The control unit performs preliminary verification of sheet attributes (size, type) before initiating the printing operation. By checking whether the sheets set in the feeding stage match the job requirements in advance, the system prevents printing with mismatched sheets, thereby avoiding truncated images or excessive margins while maintaining operational continuity.
Solution Approach 2:
The control unit establishes a feedback mechanism that continuously monitors sheet attributes during the printing process. When a mismatch between job requirements and actual sheet attributes is detected, the system provides feedback to stop the feeding operation, preventing production of defective printed products and allowing for corrective action.
2Manufacturing precision
If sheet attribute verification is implemented, then print quality is ensured, but printing operation may be interrupted
Solution Approach 1:
The verification of sheet attributes is performed as a preliminary action before the printing operation begins. This approach ensures that only properly matched sheets are used for printing, guaranteeing print quality, while the interruption only occurs if a mismatch is found during the pre-check phase, not during actual printing.
Solution Approach 2:
The system rapidly verifies sheet attributes in a quick check before printing, minimizing the time the operation is paused. If sheets are properly matched, the verification is completed swiftly and printing proceeds without further interruption, thus maintaining high productivity while ensuring quality.
3Adaptability or versatility
If feeding stage is switched for each copy, then flexibility in sheet selection is improved, but risk of sheet size mismatch increases
Solution Approach 1:
The control unit implements a feedback mechanism that verifies sheet attributes each time a feeding stage is selected or switched. When a user designates different feeding stages for different copies, the system checks whether the sheets in each selected feeding stage match the job requirements, providing feedback to prevent mismatches and ensure attribute consistency.
Solution Approach 2:
Before executing printing with switched feeding stages, the control unit performs preliminary verification of sheet attributes in each designated feeding stage. This preliminary check ensures that regardless of which feeding stage is selected for each copy, the sheet attributes will be consistent with job requirements, thereby maintaining reliability while preserving flexibility.
Data Source
AI summary
In a case where the printing of a plurality of copies based on an original image is to be executed by causing a feeding stage which is set for each of the plurality of copies to perform feeding, a feed operation is controlled so as to stop feeding from a feeding stage which serves as a feed target when a sheet attribute designated in a job and a sheet attribute set in the feeding stage are different from each other.