Mixed Duplex Printing Control for Continuous Sheet Circulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing printing technologies face challenges in efficiently mixing single-sided and double-sided printing jobs, leading to decreased printing speed and difficulty in selecting the most suitable print control method, which can degrade job execution performance.
Innovation Solution
A printing apparatus with a sheet conveyance path and memory device that automatically selects and executes the most suitable print control method by utilizing multiple waiting positions and processors to manage single-sided and double-sided printing jobs, including first, second, and third print controls based on job order and sheet conveyance path information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If double-sided circulation control is used to improve productivity, then the number of sheets processed per unit time increases, but switching between single-sided and double-sided printing causes fixed time delays that reduce total printing speed
Solution Approach 1:
The system performs preliminary actions by pre-positioning sheets in the conveyance path and pre-processing single-sided printing tasks before double-sided circulation begins. This allows the printing apparatus to maintain continuous double-sided circulation while completing single-sided printing tasks in advance, eliminating idle time and maintaining high productivity without speed penalties.
2Speed
If forced double-sided control is implemented to maintain continuous circulation, then printing speed improves, but the system loses flexibility in handling mixed single-sided and double-sided printing jobs
Solution Approach 1:
The system dynamically adjusts its control mode based on the mixing ratio of single-sided and double-sided printing tasks. When double-sided tasks dominate, forced double-sided control maintains high speed; when single-sided tasks increase, the system transitions to standard circulation control. This dynamic adaptation preserves both speed and versatility across varying job compositions.
Solution Approach 2:
The system changes operational parameters by adjusting the circulation control mode (standard vs. forced) based on the mixing ratio of printing tasks. This parameter change allows the system to optimize between speed and adaptability, selecting the appropriate control mode to match the current job requirements while maintaining overall high productivity.
3Adaptability or versatility
If standard circulation control is used for mixed printing jobs, then handling flexibility is maintained, but frequent switching between single-sided and double-sided printing significantly reduces total printing speed
Solution Approach 1:
The system continuously monitors the mixing ratio of single-sided and double-sided printing tasks and uses this feedback to determine the optimal circulation control mode. This feedback mechanism enables the system to maintain flexibility in handling mixed jobs while avoiding the speed penalties of frequent switching by selecting forced double-sided control when appropriate.
4Productivity
If the system automatically selects print control methods based on mixing ratio, then optimal performance is achieved, but the control system complexity increases
Solution Approach 1:
The system performs self-service by automatically calculating the mixing ratio of printing tasks and selecting the appropriate circulation control mode without external intervention. This self-service capability achieves optimal productivity while keeping the control system relatively simple, as the automation is based on straightforward ratio calculation and mode selection rather than complex algorithms.
Data Source
AI summary
A printing apparatus receives and executes a mixed print job in which single-sided printing and double-sided printing are mixed and includes a feeding unit that accumulates and feeds a plurality of sheets, a printer unit that prints an image on a sheet, a double-sided conveyance path that includes a refeeding unit to refeed a sheet in which an image has been printed on a first side of the sheet and to feed the sheet in order to print an image on a second side of the sheet. The printing apparatus executes double-sided print processing in a case where a print job in which a page corresponding to a sheet for which double-sided printing is instructed is included but a page corresponding to a sheet for which single-sided printing is instructed is not included.