Binding Device With Segmented Pressing Projections
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Solution Overview
Problem
Existing binding devices face challenges in minimizing creases in recording media when binding smaller stacks, as the deformation of sheets can lead to unwanted creases due to the uniform pressing mechanism, which is not suited for varying numbers of sheets.
Innovation Solution
A binding device with a pressing member pair that includes high projections for thick stacks and low projections for thin stacks, allowing for adjustable binding to reduce creases by altering the pressure distribution based on the number of sheets, using a combination of upper and lower pressing members with projection groups optimized for different stack thicknesses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a uniform pressing mechanism is used for all stack sizes, then the binding device can handle maximum capacity stacks, but creases occur in recording media when binding smaller stacks
Solution Approach 1:
The pressing member is segmented into multiple projection groups (first projection group and second projection group) with different heights. The higher projections apply greater pressure for thick stacks, while lower projections apply gentler pressure for thin stacks, preventing creases in smaller bundles.
Solution Approach 2:
Different regions of the pressing member surface have different pressing characteristics through varying projection heights. The first projection group provides strong localized pressure for deep binding in thick stacks, while the second projection group provides mild localized pressure for thin stacks, ensuring quality binding without creases across all stack sizes.
2Strength
If high pressure is applied uniformly across the pressing surface, then deep binding is achieved for thick stacks, but excessive deformation and creases occur in thinner stacks
Solution Approach 1:
The pressing member features local quality variation through multiple projection groups with different heights. Higher projections deliver strong localized pressure for deep binding where needed, while lower projections provide gentler pressure in regions where excessive force would cause creases, thus achieving strong binding without harmful deformation.
Solution Approach 2:
The pressing member incorporates projections with varying heights (different pressure parameters) to adapt the pressing force to the stack thickness. This parameter variation allows the same pressing member to achieve deep binding in thick stacks while preventing excessive deformation in thinner stacks.
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 effectively reduces creases in recording media by providing a tailored binding mechanism that adapts to the number of sheets, ensuring reliable bonding without excessive deformation, even for stacks smaller than the maximum capacity.
Implementation Method 1
a first pressing member that presses a recording-medium stack from one surface side of the recording-medium stack, a second pressing member disposed at a position opposed to the first pressing member to press the recording-medium stack from the other surface side of the recording-medium stack
Implementation Method 2
a reduction part provided in at least one pressing member of the first pressing member and the second pressing member to reduce creases in recording media of the recording-medium stack
Data Source
AI summary
A binding device includes a first pressing member that presses a recording-medium stack from one surface side of the recording-medium stack, a second pressing member disposed at a position opposed to the first pressing member to press the recording-medium stack from the other surface side of the recording-medium stack, and a reduction part provided in at least one pressing member of the first pressing member and the second pressing member to reduce creases in recording media of the recording-medium stack in a binding operation when a number of the recording media in the recording-medium stack is smaller than a maximum number of recording media to be bound by the first pressing member and the second pressing member.