Sheet Aligning Apparatus Urethane Coating Friction Control
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Solution Overview
Problem
Conventional sheet aligning apparatuses struggle to accurately align curled or soft sheets due to issues with friction and edge surface alignment, leading to incomplete or inaccurate sheet alignment.
Innovation Solution
A sheet aligning apparatus with planar alignment surfaces and a holding unit that presses and holds the curled end of the sheet, ensuring precise alignment without sliding, utilizing a urethane coating to achieve the required friction coefficient for effective sheet alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional jogger presses an end of a curled or soft sheet, then the sheet is intended to move for alignment, but the edge surface slides up and the sheet does not move along the jogger, resulting in incomplete or no alignment
Solution Approach 1:
The alignment surface is designed with a specific friction coefficient (0.3 to 0.9) that is optimized for holding curled and soft sheets. This local property modification of the alignment surface enables reliable sheet holding without requiring complex mechanical structures or additional components.
Solution Approach 2:
The friction coefficient of the alignment surface is controlled within a specific range (0.3 to 0.9) to achieve optimal sheet holding. By adjusting this physical parameter, the system can reliably align curled and soft sheets without them sliding off, while maintaining ease of operation.
2Manufacturing precision
If the jogger presses hard enough to move soft sheets, then the sheets may be moved, but the end of the soft sheet gets buckled and alignment is incomplete
Solution Approach 1:
The alignment surface has a controlled friction coefficient that provides just enough grip to move soft sheets without causing buckling. This localized friction property allows the sheet to be moved smoothly while maintaining its shape integrity.
Solution Approach 2:
Instead of applying excessive force that would buckle the sheet, the system uses a friction coefficient within the optimal range (0.3 to 0.9) to achieve partial but sufficient sheet movement. This controlled action level is enough to complete alignment without deforming the sheet.
3Reliability
If concavity and convexity are formed on the jogger surface to increase friction, then curled sheets can be aligned, but alignment accuracy is affected and concavity/convexity appear on the aligned sheet bundle side surface
Solution Approach 1:
Instead of modifying the overall jogger structure with concavity and convexity, the invention applies a localized friction control to the alignment surface by controlling its friction coefficient within a specific range. This maintains a smooth surface that ensures alignment accuracy while still providing sufficient grip for curled sheets.
Solution Approach 2:
The friction coefficient of the alignment surface is adjusted to an optimal range (0.3 to 0.9) to achieve reliable curled sheet alignment. This parameter change eliminates the need for surface modifications like concavity and convexity, thereby maintaining high alignment accuracy and producing clean sheet bundle edges.
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
The solution enables reliable and highly accurate alignment of curled and soft sheets by maintaining the sheet's position on a planar surface, ensuring high-quality alignment without the need for complex surface modifications or additional components, while also addressing static electricity issues.
Implementation Method 1
utilizing a urethane coating to achieve the required friction coefficient for effective sheet alignment
Data Source
AI summary
A sheet aligning apparatus includes an alignment surface formed in a planar shape and that presses an end of a sheet to move and align the sheet; and a holding unit that holds the end of the sheet at a position contacting the alignment surface in a state that a curled end of the sheet contacts the alignment surface and the sheet is thus pressed.