Angled Clamping Marks for Secure Sheet Binding
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Solution Overview
Problem
Conventional clamp binding methods in sheet processing apparatuses result in sheet bundles that are not sufficiently secure when handled roughly, as the clamping marks can loosen, leading to separation of sheets.
Innovation Solution
A sheet processing apparatus with a binding device that creates clamping marks at specific angles, either perpendicular to the corner or center area of the sheet bundle, utilizing a tooth form with multiple clamping faces to distribute the peeling force and enhance binding strength without increasing the complexity or cost of the mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional clamp binding is used to bind sheet bundles, then the binding method reduces consumable usage and facilitates recycling, but the binding strength is insufficient and sheets can separate when handled roughly
Solution Approach 1:
The invention changes the orientation parameter of clamping marks from conventional perpendicular-to-edge positioning to angled positioning (30-60 degrees) relative to the sheet bundle edge. This parameter change in clamping mark orientation creates multiple contact points that resist peeling forces in various directions, thereby enhancing binding strength without modifying the fundamental clamp binding mechanism
Solution Approach 2:
The invention introduces asymmetric clamping mark orientation where marks are positioned at specific angles (30-60 degrees) rather than symmetrically perpendicular to the edge. This asymmetric arrangement creates overlapping contact areas that provide resistance against sheets being pulled apart in multiple directions, improving reliability while keeping the mechanism simple
2Reliability
If clamp binding is used to bind sheets, then consumables are reduced and recycling is easier, but the clamping marks can loosen when the sheet bundle is handled roughly
Solution Approach 1:
The invention modifies the angular parameter of clamping mark positioning to between 30-60 degrees relative to the sheet bundle edge. This parameter change ensures that when sheets are pulled or handled roughly, the angled orientation creates friction and contact resistance that prevents clamping marks from loosening, thereby improving both stability and handling robustness
3Strength
If the number or arrangement of teeth in the tooth form is changed to enhance binding strength, then the binding strength increases, but the device complexity and cost increase
Solution Approach 1:
Instead of changing the number or arrangement of teeth in the tooth form, the invention changes the angular parameter of clamping mark orientation to 30-60 degrees. This approach achieves enhanced binding strength through geometric optimization rather than mechanical complexity, avoiding increased device complexity and cost while still improving the binding strength
Data Source
AI summary
A sheet processing apparatus includes a stacking channel to stack multiple sheets into a sheet bundle, and a binding device to bind together the sheet bundle, the binding device including multiple clamping portions to clamp the sheet bundle to create multiple clamping marks on the sheet bundle. When the binding device binds a corner area of the sheet bundle, a longitudinal direction of each of the multiple clamping marks forms an angle within a range from 30 degrees to 60 degrees with a side of the corner area of the sheet bundle.