Binding Device Reduction Part for Crease Control

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Solution Overview

Problem

Existing binding devices often cause creases in recording media due to excessive deformation during the binding process, particularly when using pressing members that do not effectively manage the pressure distribution across the media stack.

Innovation Solution

A binding device featuring a first and second pressing member, where at least one member includes a reduction part, such as trapezoidal projections, to reduce creases by controlling the pressure and distribution during the binding operation, allowing for efficient binding without deep insertion and minimizing deformation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If pressing members are used to bind recording-medium stack by pressing against it, then binding effect is achieved, but creases are generated in recording media

Engineering Contradiction:

Improvebinding effectVSAvoidcrease generation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The pressing members are designed with non-uniform cross-sectional shapes (tapered, convex, or trapezoidal) to create localized pressure distribution. Different regions of the pressing member have different pressing forces, concentrating the binding effect at specific locations while reducing overall deformation and crease generation in the recording media.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The invention changes the geometric parameters of the pressing members by providing them with specific cross-sectional shapes (tapered, convex, or trapezoidal) rather than uniform rectangular shapes. This parameter change allows for controlled pressure distribution that achieves binding while minimizing harmful creases.

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If pressing members with uniform structure are used, then manufacturing is simple, but pressure distribution is excessive causing deep insertion and deformation

Engineering Contradiction:

Improvepressing member fabricationVSAvoidpressure distribution control

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The pressing members incorporate local structural variations (tapered sections, convex portions, or trapezoidal shapes) that are relatively simple to manufacture using conventional molding or machining techniques. These localized features create differentiated pressure zones without requiring complex multi-component assemblies, maintaining ease of manufacture while improving pressure distribution control.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10156824B2Binding device including a reduction part

Publication Date: 2018.12.18 FUJIFILM BUSINESS INNOVATION CORP

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 when an end portion of the at least one pressing member is pressed against the recording-medium stack.