Sheet Feeder Tray Priority Control for Continuous Media Feeding
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Solution Overview
Problem
Existing image forming apparatuses face inefficiencies in managing sheet feeding priorities among multiple trays, leading to delays and interruptions when tray states are dynamically changing.
Innovation Solution
A sheet feeder with multiple trays, controlled by a processor to prioritize a top tray based on fixed states, ensuring it feeds sheets first, with secondary trays engaging only when necessary, and allowing user-defined priority changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all sheet feeding trays must be set up before feeding can commence, then the system ensures all trays are ready, but the sheet feeding speed and continuity are reduced due to waiting periods
Solution Approach 1:
The patent applies dynamics by making the priority assignment dynamic rather than static. The controller dynamically assigns priorities to sheet feeding trays based on their setup states, allowing trays that are ready to feed to be prioritized over trays that are still being set up. This dynamic priority adjustment enables the system to maintain reliability by ensuring only ready trays feed sheets, while simultaneously improving productivity by reducing waiting periods for ready trays.
Solution Approach 2:
The patent changes the parameter of priority assignment based on tray setup states. Instead of using fixed priorities, the system changes priority parameters according to whether trays are in a ready or setup state. This parameter change allows the system to optimize both reliability (by ensuring only ready trays operate) and productivity (by enabling faster feeding when trays are ready).
2Adaptability or versatility
If priorities of multiple sheet feeding trays are changed based on tray states, then sheet feeding flexibility is improved, but the control complexity increases
Solution Approach 1:
The patent applies self-service by having the tray setup states automatically trigger priority changes without requiring complex external control. The system monitors tray states and automatically adjusts priorities based on predefined conditions (ready vs. setup states). This self-service mechanism improves adaptability by enabling automatic priority adjustment, while minimizing control complexity by using simple state-based rules rather than complex algorithms.
Solution Approach 2:
The patent uses feedback by continuously monitoring tray setup states and using this information to adjust priorities. The controller receives feedback about which trays are ready and which are still setting up, and automatically responds by assigning higher priorities to ready trays. This feedback mechanism provides flexibility in priority adjustment while keeping control relatively simple through automatic state-responsive behavior.
Data Source
AI summary
A sheet feeder includes: multiple sheet feeding trays each configured to house one or more print media sheets; and a processor configured to cause a sheet feeding tray assigned a top priority to feed a print media sheet after the sheet feeding tray is set up for sheet feeding and a state of the sheet feeding tray is fixed, the top priority being highest among priorities that are assigned to the multiple sheet feeding trays and that are determined in advance with regard to sheet feeding.