Duplex Printer Jam Recovery: Continuation vs Reprint Selection
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Solution Overview
Problem
Conventional printers face difficulties in responding to user intentions after double-side printing is stopped, especially when sheets are wrinkled or jammed, making it challenging to reuse sheets with one side already printed.
Innovation Solution
A printer with a feed unit, image forming unit, acceptance unit, and control unit that allows users to select continuation printing or reprinting by accepting execution commands, enabling the printer to print only the unprinted side or reprint the entire document on a new sheet based on user input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the printer automatically conveys and reuses a sheet with one side printed after double-side printing is stopped, then productivity is improved by reducing manual intervention, but the user's intention cannot be respected when the sheet is wrinkled or damaged
Solution Approach 1:
The printer system dynamically adjusts its behavior based on the printed side state. When the first side is printed but the second side is not, the system offers the user a choice between continuation printing (reusing the sheet) and reprinting (using a new sheet). This dynamic adaptation allows the system to be both productive and user-adaptive, resolving the contradiction between automatic operation and user intention respect.
2Reliability
If the printer requires the user to manually remove and replace sheets after jam occurrence, then reliability is improved by ensuring proper sheet handling, but productivity deteriorates due to increased manual intervention time
Solution Approach 1:
The printer performs self-service by automatically conveying the sheet with the first side printed to the discharge tray and preparing it for continuation printing. This eliminates the need for manual sheet removal and replacement, maintaining reliability through proper sheet handling while improving productivity by reducing manual intervention time.
3Reliability
If the printer always reprints from the first side after double-side printing is stopped, then reliability is improved by ensuring complete document reproduction, but productivity deteriorates by wasting already printed sheets
Solution Approach 1:
The printer applies local quality by differentiating between sheets that have the first side printed and sheets that are completely unprinted. For sheets with the first side printed, the system offers continuation printing (printing only the second side) to improve productivity. For sheets without the first side printed, the system performs reprinting from the first side to ensure document reproduction accuracy. This local differentiation resolves the contradiction between reliability and productivity.
Data Source
AI summary
A printer includes a feed unit; an image forming unit, which executes double-side printing; an acceptance unit, which accepts an execution command of either continuation printing and reprinting if double-side printing is stopped and a first recording medium with only a first side image printed thereon exists in the conveying path of the printer; and a control unit, which prints only the unprinted second side image, if a continuation printing command is entered and the control unit reprints the first side image on a second recording medium and also prints the unprinted second side image on the second recording medium, if a reprinting command is entered.