Feeding Roller Pattern for Paper Particle Removal

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Solution Overview

Problem

The sticking of paper particles to the surface of a feeding roller in document conveying apparatuses reduces the friction coefficient of the roller, leading to decreased conveying performance.

Innovation Solution

A feeding roller with a surface featuring multiple groove portions arranged at regular intervals and projection portions between them, formed by knurling and emboss processing, which effectively scrape off paper particles and maintain conveying efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a smooth feeding roller surface is used, then the friction coefficient is high and gripping is good, but paper particles stick to the surface reducing conveying performance

Engineering Contradiction:

Improveconveying performanceVSAvoidpaper particle sticking

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The roller surface is segmented into multiple groove portions arranged at regular intervals, creating discrete regions that trap paper particles while maintaining overall surface integrity for gripping

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The harmful paper particles are extracted from the roller surface through the projection portions that scrape them off, separating the particles from the conveying surface to maintain friction coefficient

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If groove portions are added to the roller surface, then paper particle accumulation is prevented, but the surface complexity increases

Engineering Contradiction:

Improveconveying performanceVSAvoidroller surface structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The groove portions and projection portions are localized at specific positions on the roller surface rather than covering the entire surface, providing particle removal functionality only where needed while maintaining simplicity elsewhere

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The groove portions are arranged at regular intervals creating a periodic pattern that systematically traps and removes particles through repeated contact during roller rotation

Inventive Principle:

Principle #19Periodic action

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 design effectively alleviates the reduction in conveying performance caused by paper particles, reducing the need for frequent cleaning and maintaining performance even with paper fibers and particles.

Implementation Method 1

the paper particles that stick to the surface of the document adhere to a roller for conveying the document, which reduces the friction coefficient of rubber

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 2

multiple groove portions arranged with a regular interval in a width direction of the feeding roller on a surface of the feeding roller

Methodology Applied

Scientific EffectPhysical Containment: Physical Containment

Data Source

PatentUS10138081B2Paper feeding roller with pattern

Publication Date: 2018.11.27 PFU LTD

AI summary

A feeding roller for a document conveying apparatus includes a plurality of groove portions arranged with a regular interval in a width direction of the feeding roller on a surface of the feeding roller, and a projection portion provided between each pair of adjacent groove portions to scrape off paper particles on the external peripheral. The projection portion has a regular pattern extending in the width direction of the feeding roller.