Binding Member Tooth Form for Thick Paper Bundles
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Solution Overview
Problem
Existing binding technologies face challenges in efficiently binding thick bundles of paper without using needles, often resulting in inadequate compression and increased risk of paper tearing, due to the need for larger teeth which increase the load required for binding.
Innovation Solution
The use of a binding member with upper and lower teeth having inclined portions with shorter lengths and grooves that allow for increased advancement and compression of paper fibers, reducing the frictional force required for binding and preventing paper removal, thus enabling effective binding of thick paper bundles without needles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If larger teeth are used to bind thick bundles of paper, then binding capability is improved, but the load required for binding increases
Solution Approach 1:
The tooth form is designed with different functional zones: an inclined portion for initial contact and fiber separation, and a vertical portion for compression. This local differentiation allows each portion to perform its specific function optimally, achieving effective binding of thick paper bundles without requiring excessive overall tooth size or force.
Solution Approach 2:
The invention optimizes the tooth form parameters, specifically creating a tooth form where the inclined portion has a controlled length that is shorter than the distance to the bottom of the trough portion. This parameter optimization enables the teeth to effectively bind thick paper bundles while minimizing the required binding force through efficient fiber entanglement.
2Area of stationary object
If the inclined portion of the tooth form reaches the bottom of the trough portion, then contact area with paper is increased, but the advancement and compression of paper fibers is reduced
Solution Approach 1:
The tooth form parameters are specifically designed so that the inclined portion length is shorter than the distance to the bottom of the trough portion. This creates an optimized balance where the inclined portion provides sufficient contact area for fiber engagement, while the truncated design allows greater advancement distance for effective fiber compression and entanglement.
3Reliability
If grooves are formed in the trough portion of the tooth form, then paper fiber compression is improved, but manufacturing complexity increases
Solution Approach 1:
The tooth form is segmented into distinct portions: the inclined portion for initial fiber contact and separation, and the vertical portion for compression. Grooves are strategically formed in the trough portion to enhance fiber entanglement. This segmentation allows each feature to be manufactured independently using standard processes, minimizing overall manufacturing complexity while achieving improved fiber compression and entanglement.
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 solution allows for efficient binding of paper bundles with reduced risk of tearing, maintaining fiber entanglement and preventing paper removal, while minimizing the force needed for binding, thus enhancing the binding performance and stability.
Implementation Method 1
reducing the frictional force required for binding
Implementation Method 2
allow for increased advancement and compression of paper fibers
Data Source
AI summary
A binding member includes: an upper tooth that has an upper tooth form for forming unevenness in a bundle of recording materials; and a lower tooth that has a lower tooth form for forming unevenness in the bundle of recording materials and that forms a pair with the upper tooth. At least one of the upper tooth form and the lower tooth form is formed such that, in a sectional shape, a groove is formed in a trough portion of a concave portion of a tooth form and a length of an inclined portion which comes into contact with the bundle of recording materials is made small compared to a case where the inclined portion of the tooth form has reached a bottom of the trough portion.