Sheet Transport Position Correction with Variable Factors
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Solution Overview
Problem
Existing sheet transporting devices face challenges in accurately correcting the position of long-size papers and papers with higher basis weights or surface irregularities, leading to misregistration issues due to uniform correction methods that do not account for varying paper characteristics.
Innovation Solution
A sheet transporting device with first and second position correcting components that can adjust the amount of correction individually by using a changing component, which multiplies the shifting amount by a correction factor based on paper characteristics such as length, basis weight, and material, to accurately correct lateral misregistration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If uniform correction amount is applied to first and second position correcting components, then device complexity is reduced, but manufacturing precision deteriorates due to inability to account for varying paper characteristics
Solution Approach 1:
The patent applies parameter changes by introducing a correction factor that modifies the correction amount based on paper characteristics such as length, basis weight, and surface irregularities. The control device calculates different correction amounts for first and second position correcting components by multiplying a base correction amount by paper-specific correction factors, thereby achieving accurate correction for various paper types without excessive complexity
Solution Approach 2:
The patent implements local quality by applying different correction amounts to different position correcting components based on their specific positions and the paper characteristics. The first position correcting component (skew correcting component) and second position correcting component receive tailored correction amounts according to local paper behavior at each position, improving overall correction accuracy
2Manufacturing precision
If individual correction amounts are calculated for first and second position correcting components based on paper characteristics, then manufacturing precision is improved, but device complexity increases due to additional control calculations
Solution Approach 1:
The control device changes parameters by calculating correction factors based on paper characteristics (length, basis weight, surface irregularities) and applying these factors to determine individual correction amounts for each position correcting component. This parameter-based approach enables precise correction while keeping control logic systematic and manageable
Solution Approach 2:
The system implements feedback by using detection results from sheet position detection to calculate appropriate correction amounts. The control device receives detection signals, determines paper characteristics, calculates correction factors, and adjusts the correction amounts for position correcting components based on this feedback loop, ensuring accurate correction adapt
Data Source
AI summary
A sheet transporting device includes first and second position correcting components provided at respective positions in a direction of sheet transport and each being configured to correct a position of a sheet in a direction intersecting the direction of sheet transport by being shifted in the direction intersecting the direction of sheet transport while holding the sheet, and a changing component capable of changing an amount of correction of the position of the sheet individually for the first and second position correcting components.