Image Forming Apparatus Automatic Feed Delay Jam Clearing
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Solution Overview
Problem
In image forming apparatuses, users often need to manually intervene to clear jams, which can be unnecessary and inconvenient, especially for types like feed delay jams where the apparatus can continue operating without user action.
Innovation Solution
An image forming apparatus with an image processing control unit, an image forming control unit, and a detecting unit that discriminates types of jams and automatically transmits cancellation signals to clear specific jams, such as feed delay jams, without requiring user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the user manually opens the cover and removes jammed sheet material to clear any jam, then the jam can be cleared, but the user burden increases unnecessarily for certain jam types where automatic clearing is possible
Solution Approach 1:
The system performs self-diagnosis of jam types using detection units and automatically clears feed delay jams by controlling the paper feed roller to rotate in reverse, eliminating the need for user intervention in cases where the sheet material can be automatically ejected
Solution Approach 2:
The system changes the operational parameters of the paper feed roller by controlling it to rotate in reverse direction for a predetermined time, enabling automatic clearing of feed delay jams without user intervention
2Ease of operation
If the system automatically clears feed delay jams by controlling the paper feed roller to rotate in reverse, then user intervention is eliminated, but the device complexity increases
Solution Approach 1:
The system uses detection units to monitor sheet material conveyance status and provides feedback to the control unit, which then automatically adjusts the paper feed roller rotation to clear feed delay jams
Solution Approach 2:
The system dynamically adjusts the rotation direction and duration of the paper feed roller based on real-time detection of jam types, enabling automatic clearing without fixed mechanical structures
Data Source
AI summary
An engine controller 21 discriminates defective conveyance of a sheet material 2 on the basis of information regarding the presence or absence of the sheet material 2 which is outputted from a TOP sensor 7 and an ejection sensor 17 (S202), discriminates to which one of a plurality of types of defective conveyance the defective conveyance relates, and transmits information regarding the defective conveyance to an image controller 23. If the information regarding the defective conveyance received from the engine controller 21 is information showing the occurrence of a feed delay jam, the image controller 23 transmits a jam clear command to cancel the feed delay jam to the engine controller 21.