Duplex Printing Paper Feeding Interval Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing printing systems with post-processing units face productivity issues due to inefficient paper feed control during duplex printing, as they do not account for varying post-processing times, leading to suboptimal paper feeding intervals and reduced productivity.
Innovation Solution
A printing apparatus with a control section that adjusts paper feeding intervals and timing based on post-processing times, optimizing the paper spacing interval to minimize differences between feeding intervals and post-processing times, ensuring efficient paper flow and improved productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the paper feeding interval is changed into an integer multiple of the original paper feeding interval to account for post-processing time, then the post-processing timing is improved, but the productivity decreases due to large difference between feeding interval and post-processing time
Solution Approach 1:
The patent applies dynamics by making the paper feeding interval adjustable rather than fixed. The control section dynamically determines the paper feeding interval based on the actual post-processing time, allowing the system to adapt to varying post-processing requirements while maintaining optimal productivity. This resolves the contradiction by enabling the feeding interval to flexibly match post-processing time without being constrained to integer multiples.
Solution Approach 2:
The patent changes the parameter of paper feeding interval from a fixed integer multiple to a dynamically determined value based on post-processing time. By calculating the appropriate feeding interval according to actual post-processing requirements, the system optimizes both timing accuracy and productivity, avoiding the waste caused by excessive interval multiplication.
2Reliability
If an excessively long time is set for passing each printed printing paper sheet from the printing apparatus to the post-processing unit, then the post-processing timing is ensured, but the productivity is lowered
Solution Approach 1:
The patent optimizes the paper feeding interval parameter by calculating it based on actual post-processing time requirements rather than using excessive or fixed values. This ensures that the feeding interval is long enough to accommodate post-processing while being short enough to maintain high productivity, resolving the contradiction between timing reliability and productivity.
Solution Approach 2:
The control section automatically determines the optimal paper feeding interval based on the post-processing time information, eliminating the need for manual setting or excessive safety margins. The system self-adjusts to achieve the minimum necessary feeding time, thereby maximizing productivity while ensuring proper timing.
Data Source
AI summary
A printing section for performing duplex printing by performing printing on each printing paper sheet fed by a feeding section and performing printing on the other side of the one-side printed printing paper sheet that has been inverted by an inverting section; a control section for exert control to alternately perform the printing on each printing paper sheet from the feeding section and the printing on each one-side printed printing paper sheet; a post-processing time obtaining section for obtaining a post-processing time for each duplex printed printing paper sheet; and a feeding timing setting section for setting a feeding interval of the printing paper sheets from the feeding section based on the post-processing time for each duplex printed printing paper sheet, and calculating a paper spacing interval between each printing paper sheet from the feeding section and each one-side printed printing paper sheet based on the post-processing time.