Sheet Pressing Apparatus with Segmented Folding Rollers
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Solution Overview
Problem
Existing sheet folding apparatuses are large, costly, and inefficient due to the need for extensive space and time to perform additional folding, with dispersed pressure leading to reduced folding efficiency.
Innovation Solution
A sheet pressing apparatus with a compact design featuring a supporting member and multiple pressing members that move along the folding line, allowing for efficient additional folding by minimizing the distance and space required, and enhancing pressure distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If one repress roller is moved along the folding line from one edge to the other edge to perform additional folding, then the additional folding process can be completed, but the process time becomes long and the apparatus size increases
Solution Approach 1:
The patent divides the folding line into multiple segments by arranging multiple pressing members (first pressing members 114 and second pressing members 115) at different positions along the folding line. Each pressing member handles a specific segment, allowing simultaneous pressing of multiple segments rather than sequential processing by a single roller.
Solution Approach 2:
The patent transitions from a single-point pressing approach to a distributed multi-point pressing approach by arranging pressing members in the longitudinal direction of the folding line. This spatial distribution across multiple positions enables parallel processing of different segments of the folding line.
2Manufacturing precision
If rollers are supported on the roller supporting member for a distance longer than the folding line to allow movement along the folding line, then the additional folding can be performed, but the apparatus size and roller cost increase
Solution Approach 1:
The pressing function is segmented into multiple discrete pressing members positioned at specific locations along the folding line, rather than using a continuous roller supporting member that spans the entire folding line. This reduces the overall apparatus size while maintaining folding capability.
Solution Approach 2:
Pressing members are strategically positioned at specific locations along the folding line where they are most needed, rather than distributing pressure uniformly across the entire folding line. This localized approach reduces the number of components required.
3Loss of time
If the roller supporting member is moved along the folding line to perform additional folding, then the process time can be reduced, but the pressure one roller applies to the folding line decreases due to dispersed force
Solution Approach 1:
The total pressing force is segmented and applied at multiple discrete points along the folding line through multiple pressing members, rather than dispersing a single roller's force over a long distance. This concentrates the force at each pressing point.
Solution Approach 2:
Multiple pressing members work simultaneously to press different segments of the folding line, combining their individual pressing forces to achieve effective folding across the entire line. The combined action of multiple members compensates for the shorter travel distance of each individual member.
Data Source
AI summary
A sheet pressing apparatus includes an inlet port for receiving a sheet having a folding line; additional folding rollers supported by a supporting member arranged downstream from the inlet port; a lower folding guide opposing the additional folding rollers; a first drive mechanism configured to move the additional folding rollers between a pressing position, at which the additional folding rollers approach the lower folding guide to press the sheet at the folding line, and a retreat position to which the additional folding rollers are moved from the pressing position, separating from the sheet; and a second drive mechanism configured to move the additional folding rollers along the folding line. The additional folding rollers are arranged such that one end of the folding line exists between the two additional folding rollers provided at one position and the additional folding roller at the other end position is arranged on the folding line.