Variable Curving Paper Conveying Route for Curl Correction
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Solution Overview
Problem
Existing paper correction apparatuses face challenges in maintaining consistent sheet intervals due to varying curl correction strengths, leading to productivity reductions and increased risk of paper jams or waiting times in finishers.
Innovation Solution
A paper correction apparatus with a variable curved paper conveying route, controlled by a sensor and controller system, adjusts the curving amount and sheet interval based on detected sheet characteristics, ensuring consistent sheet delivery to the finisher.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the curving amount of the conveyor belt is increased to correct strongly curled sheets, then the paper correction effectiveness is improved, but the sheet interval becomes inconsistent and productivity decreases
Solution Approach 1:
The patent applies dynamics by making the curving amount of the paper conveying route adjustable and variable. The curved conveyor route can dynamically change its curving degree based on the curl characteristics of each sheet, allowing strong correction for heavily curled sheets while maintaining appropriate correction for lightly curled sheets, thus resolving the contradiction between correction effectiveness and productivity
Solution Approach 2:
The patent changes the geometric parameter of the conveying route by adjusting the curving amount of the conveyor belt. By varying the curving parameter according to sheet conditions, the system achieves both effective curl correction and consistent sheet intervals, preventing both paper jams and excessive waiting times
2Productivity
If the sheet interval is reduced to increase productivity, then the output speed is improved, but paper jams occur more frequently in the finisher
Solution Approach 1:
The patent uses feedback from sheet curl detection to adjust the curving amount of the conveying route. This feedback mechanism ensures that each sheet receives appropriate correction based on its actual curl state, resulting in more predictable and consistent sheet intervals that prevent paper jams while maintaining high productivity
3Manufacturing precision
If the curving amount is increased to correct warped sheets, then the paper conveying length becomes longer, but the sheet arrival time at the finisher becomes inconsistent
Solution Approach 1:
The system dynamically adjusts the curving amount based on detected sheet curl characteristics. For sheets with severe warping, a larger curving amount is applied to achieve proper flatness, while sheets with minor curl receive smaller curving adjustments. This dynamic adaptation ensures that all sheets arrive at the finisher at consistent intervals despite varying correction requirements
Data Source
AI summary
A paper correction apparatus B corrects a curl of a sheet S by passing the sheet S through curved paper conveying routes CCP1 and CCP2 whose curving amounts can be changed. The paper correction apparatus B is provided with a control unit B3 which sets the curving amounts of the curved paper conveying routes CCP1 and CCP2, and changes a sheet interval in accordance with the curving amounts which are set. By this configuration, it is possible to inhibit the productivity from being reduced due to paper correction during performing post-printing processes in a finisher which is located in the downstream side of the paper correction apparatus B.