Pressing Protrusion Shifting for Sheet Fold Bulge Reduction
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Solution Overview
Problem
Existing sheet processing apparatuses face challenges in effectively reducing bulging and fold wrinkles in sheet bundles during the folding and binding processes, often requiring increased spring loads or larger apparatuses to maintain pressing efficiency.
Innovation Solution
A sheet processing apparatus featuring a pair of pressing members with protrusions that move along the fold section, concentrating the pressing load on specific locations to reduce bulging while minimizing the need for increased spring loads or apparatus size, and shifting the pressing position to ensure thorough pressing without causing wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If increased spring loads are used to press the fold section, then pressing efficiency is improved, but apparatus size and spring load requirements increase
Solution Approach 1:
The pressing member is provided with protrusions that concentrate the pressing load on specific locations of the fold section rather than distributing it uniformly. This localized pressing approach improves pressing efficiency by focusing force where it is most needed to reduce bulging, while avoiding the need to increase the overall spring load across the entire pressing mechanism.
Solution Approach 2:
The pressing member is segmented into multiple protrusions arranged along the fold section. Each protrusion independently presses a specific location, allowing the system to achieve effective pressing with reduced total force requirements compared to a uniform pressing approach.
2Productivity
If increased spring loads are used to press the fold section, then pressing efficiency is improved, but apparatus size increases
Solution Approach 1:
By concentrating pressing force through protrusions at critical locations rather than using a large-area uniform pressing mechanism, the apparatus achieves effective pressing with a more compact structure, reducing the overall apparatus size while maintaining pressing efficiency.
Solution Approach 2:
The segmented protrusion design allows the pressing function to be achieved with a smaller, more compact apparatus compared to a uniform pressing mechanism that would require larger dimensions to distribute force across the entire fold section.
3Area of stationary object
If uniform pressing is applied across the fold section, then pressing coverage is improved, but bulging and fold wrinkles are not effectively reduced
Solution Approach 1:
The protrusions are strategically positioned to press specific locations on the fold section where bulging is most likely to occur. This localized pressing approach is more effective at reducing bulging and wrinkles than uniform pressing, as it targets the problem areas directly while maintaining adequate pressing coverage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively suppresses bulging and fold wrinkles in sheet bundles by concentrating the pressing load on specific locations, allowing for efficient pressing with reduced spring loads and maintaining a compact apparatus size.
Implementation Method 1
The pressing unit has a protrusion and presses the protrusion against a fold section of a sheet
Implementation Method 2
The shifting unit moves at least one of the protrusion of the pressing unit and the sheet so as to shift a pressing position
Data Source
AI summary
A sheet processing apparatus includes a pressing unit and a shifting unit. The pressing unit has a protrusion and presses the protrusion against a fold section of a sheet. The fold section extends in one direction. The shifting unit moves at least one of the protrusion of the pressing unit and the sheet so as to shift a pressing position, at which the fold section is pressed by the protrusion, in the one direction or in a direction opposite to the one direction.