Paper Jam Detection and Control Logic for Image Forming Apparatus
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Solution Overview
Problem
In image forming apparatuses, paper jams often result in prolonged downtime due to incomplete removal of jammed paper, as existing systems lack effective detection and control mechanisms to ensure the paper is fully cleared before restarting operations.
Innovation Solution
An information processing device with an opening and closing detection unit, a paper jam detection unit, and a time measurement unit that controls the paper jam process, ensuring the jam is not cleared until a predetermined time has passed after the door is closed, preventing premature restarts and ensuring complete removal of jammed paper.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the system restarts immediately after door closure following a paper jam, then productivity is improved by minimizing downtime, but reliability deteriorates due to incomplete paper removal causing re-occurring jams
Solution Approach 1:
The system performs preliminary detection of paper removal status before allowing restart. The paper jam detection unit checks whether paper has been completely removed from the transporting passage, and only after confirmation does the control unit permit operation resumption, preventing premature restarts that would cause re-occurring jams
Solution Approach 2:
The system implements continuous feedback monitoring through the paper jam detection unit that tracks paper presence in the transporting passage. This feedback loop provides real-time information to the control unit about whether the passage is clear, enabling informed decisions about when to resume operations and preventing restarts before complete paper removal
2Reliability
If the system implements comprehensive paper removal detection, then reliability is improved by preventing re-occurring jams, but device complexity increases due to additional detection and control mechanisms
Solution Approach 1:
The paper jam detection unit serves multiple functions: it detects paper presence during jam conditions, monitors paper removal progress, and provides feedback for restart authorization. This multi-functionality reduces the need for separate dedicated sensors and control circuits for each function, thereby limiting the increase in device complexity while maintaining comprehensive paper removal detection
Data Source
AI summary
Provided is an information processing device, including an opening and closing detection unit that detects opening and closing of an opening and closing door which exposes a paper transporting passage for transporting paper, a paper jam detection unit that detects a paper jam in the paper transporting passage, a time measurement unit that measures a time when the paper jam is detected and opening of the opening and closing door is detected, and a control unit that controls the paper jam to be continued when a time measured by the time measurement unit is shorter than a predetermined time in case of detecting closing of the opening and closing door.