Feed Roller Rotation Control During Storage Cassette Removal
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Solution Overview
Problem
The rotation position of the feed roller in a printing apparatus shifts when the storage cassette is removed, leading to multiple sheet feeding issues.
Innovation Solution
A printing apparatus with a regulating unit that controls the rotation of the feed roller in conjunction with the removal of the storage cassette, ensuring consistent sheet feeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the storage cassette is made withdrawable for ease of operation, then the ease of operation is improved, but the rotation position of the feed roller shifts causing multiple sheet feeding
Solution Approach 1:
The regulating unit performs preliminary action by detecting the withdrawal of the storage cassette and proactively regulating the feed roller's rotation position before it causes multiple sheet feeding. The regulation occurs in advance during the cassette removal process, preventing the harmful effect before it manifests.
Solution Approach 2:
The regulating unit establishes a feedback mechanism that detects the state of the storage cassette (present or withdrawn) and adjusts the feed roller's rotation accordingly. This closed-loop control ensures the feed roller maintains correct rotation position despite the withdrawable nature of the storage cassette.
2Ease of operation
If the feed roller rotates freely during cassette removal, then the ease of operation is maintained, but the sheet feeding consistency deteriorates
Solution Approach 1:
The system dynamically adjusts the feed roller's rotation based on the real-time state of the storage cassette. When the cassette is withdrawn, the regulating unit modifies the feed roller's rotation characteristics to maintain sheet feeding consistency. This dynamic adaptation allows the system to maintain precision while preserving operational ease.
Data Source
AI summary
A printing apparatus including: a housing; a feed roller, disposed in the housing, that feeds a sheet; a printing unit configured to print onto the sheet fed by the feed roller, and a storage cassette capable of being attached to and removed from the housing, the storage cassette storing the sheet, wherein the storage cassette includes a sheet separation unit capable of contacting the feed roller, and the printing apparatus comprises a regulating unit, disposed in the housing, configured to regulate rotation of the feed roller in conjunction with removal of the storage cassette from the housing.