Image Forming Apparatus Tab Sheet Confirmation Printing
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Solution Overview
Problem
In printing environments, especially in POD systems, confirmation printing often disrupts the printing process, leading to incomplete or incorrect output when tab sheets are used for both confirmation and main printing, resulting in suboptimal printed materials due to the inability to seamlessly manage tab sheet sets.
Innovation Solution
An image forming apparatus that can stop and restart printing operations, using non-tab sheets for confirmation printing, ensuring that tab sheets are not used for both confirmation and main printing, thereby maintaining the integrity of the printed material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If confirmation printing is executed using tab sheets during main printing, then the user can confirm printing quality without stopping the main printing process, but the tab sheets intended for main printing are consumed, resulting in incomplete or incorrect printed material
Solution Approach 1:
The patent extracts the confirmation printing function from the main printing process by using a separate sheet supply unit (second sheet supply unit) dedicated to confirmation printing, while the tab sheets in the first sheet supply unit are reserved exclusively for main printing. This separation ensures that confirmation printing does not consume the specialized tab sheets needed for the actual printing job.
Solution Approach 2:
The patent introduces a second sheet supply unit as an intermediary resource for confirmation printing. This separate sheet supply acts as a mediator that enables quality confirmation without interfering with the tab sheet inventory required for main printing, thus resolving the conflict between confirmation needs and material preservation.
2Reliability
If the printing process is stopped for confirmation printing, then the user can verify printed material quality, but the overall printing productivity decreases due to process interruption
Solution Approach 1:
The patent enables continuous printing by executing confirmation printing simultaneously with main printing through a separate sheet supply unit. The main printing process continues uninterrupted while confirmation pages are printed on different sheets, eliminating the need to stop the printing process for quality verification and maintaining continuous productive output.
3Reliability
If multiple sheet supply units are used to separate tab sheets and regular sheets, then confirmation printing can be performed without consuming tab sheets, but the device complexity increases
Solution Approach 1:
The patent segments the sheet supply function into two distinct units: a first sheet supply unit for tab sheets and a second sheet supply unit for confirmation printing. This segmentation allows independent management of different sheet types, ensuring proper sheet usage while maintaining clear functional separation that simplifies control logic despite the additional hardware component.
Data Source
AI summary
An image forming apparatus includes an execution unit, a reception unit, and a control unit. The execution unit executes a printing job using a tab sheet from a first sheet supply unit and a sheet, other than a tab sheet, from a second sheet supply unit. The reception unit receives an instruction to confirm printed material of the printing job. The control unit controls the execution unit to stop a printing operation of the printing job that the execution unit is executing and print, for confirmation, at least one page included in the printing job, based on receiving the instruction. The control unit further controls the execution unit to restart the stopped printing job after the printing for the confirmation is ended and to execute the printing for the confirmation by not using a tab sheet and by using a sheet other than a tab sheet.