Sheet Tamper with Rotating Paddles for Curled Edge Alignment
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Solution Overview
Problem
Existing sheet processing systems face challenges in efficiently aligning and binding sheets, particularly due to issues with static electricity causing curled edges and inconsistent alignment, which affects the quality of the sheet bundle.
Innovation Solution
The finishing apparatus incorporates a sheet pressing mechanism with rotating paddles and a stapler, where the sheet pressing members, supported by sub paddle mechanisms, press and guide sheets onto a compile tray with an end guide, ensuring accurate alignment and binding of sheets, even when edges are curled, using a combination of main and sub paddles to move sheets toward the end guide for alignment and a stapler for binding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sheets are processed without a sheet pressing mechanism, then the device complexity is reduced, but the alignment precision deteriorates due to curled edges from static electricity
Solution Approach 1:
The sheet pressing mechanism is divided into multiple independent pressing members (first pressing member, second pressing member, third pressing member) that can operate independently on different portions of the sheet. Each pressing member is supported by separate sub paddles, allowing segmented application of pressing force to address curled edges at different locations without requiring a complex monolithic pressing structure.
Solution Approach 2:
The pressing members are designed to automatically press the sheet against the end guide when the sheet is fed, without requiring additional control mechanisms. The sub paddles automatically move the pressing members into position based on the sheet's presence, and the pressing action occurs naturally as the sheet is transported, eliminating the need for complex control systems while maintaining alignment precision.
2Manufacturing precision
If multiple pressing members are used to handle curled edges, then the alignment precision is improved, but the device complexity increases
Solution Approach 1:
Multiple pressing members are merged with the sub paddle mechanism, where each pressing member is directly supported by a sub paddle. This integration allows the sub paddles to perform dual functions: transporting the sheet and supporting the pressing members. The merging eliminates the need for separate support structures for each pressing member, reducing overall device complexity while maintaining the precision benefits of multiple pressing points.
Solution Approach 2:
The sub paddles are designed with multi-functionality, serving both as transport elements that move the sheet through the finishing apparatus and as support elements for the pressing members. This universal design allows a single component to fulfill multiple roles, reducing the total number of parts needed and simplifying the overall device structure while still providing precise alignment through multiple pressing members.
3Manufacturing precision
If the sheet pressing mechanism presses the sheet firmly, then the alignment precision is improved, but the sheets may be damaged or the binding quality may deteriorate
Solution Approach 1:
Each pressing member is designed to apply pressure only to specific local areas of the sheet where curled edges occur, rather than pressing the entire sheet uniformly. The pressing members can be positioned to target specific regions (leading edge, trailing edge, sides) independently, applying firm pressure only where needed for alignment while leaving other areas unaffected, thus maintaining sheet integrity and preventing damage.
Solution Approach 2:
The pressing members apply pressing force selectively and temporarily only during the alignment phase, rather than continuously throughout the entire processing cycle. The pressing action is applied partially (only to curled portions) and temporarily (only when needed for alignment), avoiding excessive or prolonged pressure that could damage the sheet or affect binding quality. After alignment is achieved, the pressing force is released.
Data Source
AI summary
A finishing device with an output unit that outputs a recorded sheet on which an image is recorded, a sheet stacker that receives the recorded sheet from the output unit and on which the recorded sheet is stacked, and a reference surface against which the recorded sheet on the sheet stacker is aligned. A binding unit binds a bundle of the recorded sheets aligned against the reference surface and a sheet pressing member presses an end portion of the recorded sheet toward the sheet stacker. The end portion is closer to the reference surface, and a first moving and pressing unit moves the recorded sheet toward the reference surface while the sheet pressing member presses the end portion of the recorded sheet.