Two-Ply Sheet Positional Deviation Correction in Separation Apparatus
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Solution Overview
Problem
Existing sheet processing apparatuses struggle to perform effective sheet separation and insertion operations when a two-ply sheet is positionally deviated in the width direction during conveyance, leading to poor sheet alignment and potential twisting of the two-ply sheet.
Innovation Solution
A sheet processing apparatus equipped with a sheet separator, a position detector, a position adjuster, a take-up member, and a take-up assembly, which separates the two sheets of a two-ply sheet, detects positional deviations, adjusts the sheet position, and inserts a sheet medium between the separated sheets, ensuring accurate alignment and preventing twisting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sheet separation device uses a winding roller to separate two sheets of a two-ply sheet, then the sheet separating operation can be performed, but positional deviation of the two-ply sheet in the width direction causes poor sheet alignment and twisting
Solution Approach 1:
The patent introduces a registration unit with registration rollers that perform preliminary lateral position adjustment of the two-ply sheet before it reaches the sheet separation unit. The position detector detects the lateral position of the two-ply sheet, and the registration rollers adjust the position in the width direction based on the detected position, ensuring proper alignment before separation occurs. This preliminary action prevents alignment issues during the separation operation.
2Manufacturing precision
If registration rollers are used to adjust lateral position of the sheet, then positional deviation can be corrected, but rollers other than registration rollers may cause the two-ply sheet to be twisted
Solution Approach 1:
The patent extracts the sheet gripping function from multiple rollers and concentrates it solely on the registration rollers during the lateral position adjustment phase. The configuration ensures that only the registration rollers contact and move the two-ply sheet in the width direction for position correction, while other rollers are positioned or designed to avoid contacting the sheet during this adjustment process. This prevents twisting by eliminating unnecessary contact points that could cause rotational instability.
3Speed
If the two-ply sheet is gripped at two positions in the sheet conveyance direction, then the sheet can be conveyed, but lateral registration correction is likely to cause the sheet to be twisted
Solution Approach 1:
The patent implements a dynamic control system where the registration rollers are actuated to provide lateral position adjustment only when needed during conveyance. The system detects the lateral position of the two-ply sheet and dynamically adjusts the registration rollers' position in the width direction based on real-time detection feedback. This dynamic approach allows the sheet to be conveyed at two grip positions while performing lateral correction without causing twisting, as the adjustment is precisely controlled and temporary.
Data Source
AI summary
A sheet processing apparatus includes a sheet separator, a position detector, a position adjuster, a take-up roller, and a take-up assembly. The sheet separator separates a two-ply sheet, and inserts a sheet medium into the two-ply sheet. The position detector detects respective amounts of positional deviations of the two-ply sheet and the sheet medium. The position adjuster adjusts the positional deviation of the two-ply sheet, before a sheet separating operation, based on the amount of the positional deviation of the two-ply sheet. The take-up roller takes up the two-ply sheet subjected to the sheet separating operation. The take-up assembly moves the take-up roller in a width direction. The position adjuster causes the positional deviation of the two-ply sheet to be adjustable based on the amount of the positional deviation of the sheet medium. The take-up assembly causes the take-up roller to be movable in sync with the position adjuster.