Feeding Device Slide Mechanism Reduces Sheet Bending

Solution Overview

Problem

Conventional feeding devices in digital processing machines often cause sheet bending and damage due to high friction forces, leading to paper jams and feeding failures, especially with thin sheets.

Innovation Solution

A feeding device with a slide mechanism that switches between two positions, initially contacting the sheet with a low-friction slide and then a high-friction roller, ensuring sheets remain flat and reducing bending during the feeding process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a sheet-feeding roller made of rough material is used to separate sheets, then the sheets can be separated easily, but the sheets become bent and damaged due to high friction force

Engineering Contradiction:

Improvesheet separationVSAvoidsheet bending and damage

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The feeding device is divided into two functional segments: a pickup roller with high friction coefficient for sheet separation, and a sheet-feeding roller with low friction coefficient for smooth transport. This segmentation allows each component to perform its specific function without causing sheet damage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different parts of the feeding system have different friction characteristics tailored to their specific functions. The pickup roller has high friction locally where sheet separation is needed, while the sheet-feeding roller has low friction locally where smooth sheet transport is required.

Inventive Principle:

Principle #3Local quality

2Reliability

If a pickup roller with high friction coefficient is used to hold and convey sheets, then the sheets can be picked up effectively, but the sheets become bent and damaged due to high friction force

Engineering Contradiction:

Improvesheet pickupVSAvoidsheet bending and damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The feeding device is divided into two functional segments: a pickup roller with high friction coefficient for sheet separation, and a sheet-feeding roller with low friction coefficient for smooth transport. This segmentation allows each component to perform its specific function without causing sheet damage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The slide acts as an intermediary element between the sheet and the rollers. It guides the sheet from the pickup roller to the sheet-feeding roller, ensuring smooth transition and preventing direct contact that would cause bending and damage.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If the slide is not introduced, then the device structure remains simple, but the sheets cannot be protected from friction-induced bending and damage

Engineering Contradiction:

Improvesheet protectionVSAvoiddevice structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The slide acts as an intermediary element between the sheet and the rollers. It guides the sheet from the pickup roller to the sheet-feeding roller, ensuring smooth transition and preventing direct contact that would cause bending and damage.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The slide is designed to be automatically lowered by the rotation of the sheet-feeding roller itself, eliminating the need for separate actuators or complex control mechanisms. The roller's rotation naturally drives the slide into position through the one-way bearing mechanism.

Inventive Principle:

Principle #25Self-service

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 slide mechanism ensures a smooth sheet-feeding process by minimizing friction-induced bending and damage, preventing paper jams and ensuring reliable operation with digital processing machines.

Implementation Method 1

a one-way bearing sheathed on an axle of the sheet-feeding roller. The one-way bearing lowers the slide from the first position to the second position when the sheet-feeding roller rotates.

Methodology Applied

Scientific EffectOne-way bearing mechanism:

Implementation Method 2

The sheet-feeding roller separates a sheet with the friction device

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS9902579B2Feeding device with slide

Publication Date: 2018.02.27 AVISION

AI summary

A feeding device for a digital processing machine includes a paper passage, a sheet-feeding roller, a friction device, and a slide. The sheet-feeding roller is disposed in the paper passage, and the friction device is disposed opposite to the sheet-feeding roller. The sheet-feeding roller separates a sheet with the friction device. The slide is disposed at a left side and a right side of the sheet-feeding roller. The slide is lowered from a first position to a second position when the sheet-feeding roller rotates, such that the sheet contacts the sheet-feeding roller.