Image Forming Apparatus Sheet Bundle Separation During Jam
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Solution Overview
Problem
Existing image forming apparatuses face inefficiencies in minimizing sheet waste during paper jams, as they often require manual intervention and result in misalignment or mixing of sheets, leading to unnecessary reprints and increased toner usage.
Innovation Solution
The apparatus incorporates a control unit that determines the discharging destination for remaining sheets based on sensor detection, directing sheets of the same bundle to an intermediate processing tray and different bundles to a stacking tray, and executes bookbinding and cutting operations for the intermediate tray contents after a paper jam is cleared.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all remaining sheets are discharged to one sheet discharge tray when a paper jam occurs, then the discharge process is simple, but sheets of different bundles may be mixed together requiring manual separation
Solution Approach 1:
The invention divides the sheet discharge process into two separate paths: one for sheets of the same bundle (discharged to the intermediate processing tray) and another for sheets of different bundles (discharged to the stacking tray). This segmentation prevents mixing of different bundles while maintaining operational simplicity through automatic control.
Solution Approach 2:
The invention introduces an intermediate processing tray as a mediator between the first conveyance path and the final discharge destinations. This intermediary tray temporarily holds sheets of the same bundle before final processing, enabling accurate bundle separation without complicating the overall discharge operation.
2Manufacturing precision
If remaining sheets are discharged to a stacking tray, then sheets of different bundles can be separated, but sheets of the same bundle may be incorrectly separated requiring reprints
Solution Approach 1:
The invention segments the discharge destination selection based on bundle identification: sheets of the same bundle are directed to the intermediate processing tray while sheets of different bundles are directed to the stacking tray. This precise segmentation prevents unnecessary separation of same-bundle sheets, eliminating the need for reprints and reducing sheet waste.
3Manufacturing precision
If manual intervention is required to separate mixed sheets, then bundle separation can be achieved, but productivity decreases and toner is wasted
Solution Approach 1:
The invention implements a self-service system where the control unit automatically identifies sheet bundles and directs them to appropriate discharge destinations without manual intervention. The system uses sensor detection and control logic to autonomously separate bundles, maintaining high processing efficiency while achieving accurate separation.
Solution Approach 2:
The invention employs feedback mechanisms through sensors that detect sheet characteristics and provide information to the control unit. This feedback enables the system to make real-time decisions about discharge destinations, ensuring accurate bundle separation while maintaining continuous operation and high productivity.
4Manufacturing precision
If sheets are discharged to multiple different trays, then bundle mixing is prevented, but device complexity increases
Solution Approach 1:
The invention makes the intermediate processing tray multi-functional: it serves as both a discharge destination for same-bundle sheets and as a processing station for bookbinding and cutting operations. This universality reduces the need for additional specialized trays, preventing device complexity from increasing significantly while maintaining accurate bundle separation.
Data Source
AI summary
An image forming apparatus includes an image forming unit to form an image on a sheet, an intermediate processing tray where sheets conveyed through a first conveyance path are stacked as a sheet bundle, a sensor disposed at a second conveyance path to detect a conveyed sheet bundle, and a stacking tray in which sheets discharged through a discharging path diverging from the first conveyance path are stacked. In response to a sensor detected paper jam, a control unit determines the intermediate processing tray as the discharging destination for a sheet among the remaining sheets, and determines the stacking tray as the discharging destination for a sheet among the remaining sheets. After the paper jam is cleared, the control unit causes execution of bookbinding and cutting for a sheet bundle including the remaining sheets stacked in the intermediate processing tray.