Feed Roller Support Deflection for Stable Paper Nipping
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Solution Overview
Problem
Existing feed roller mechanisms in printers face issues with inconsistent nipping forces between rollers due to assembly errors, leading to slippage difficulties, excessive tension, and potential paper breakage or distortion.
Innovation Solution
A feed roller mechanism that utilizes plate-shaped support members to determine nipping force through deflection reaction, allowing for easy adjustment to appropriate nipping forces by changing the assembly state of the support members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the nipping force between the two rollers is increased to prevent slippage, then the continuous paper is less likely to slip, but the continuous paper breaks due to excessive tension
Solution Approach 1:
The first support member is designed as a flexible component that can deflect under load, allowing the nipping force to be dynamically adjusted based on the paper being fed rather than being fixed. This flexibility prevents excessive force from being applied to the paper while still maintaining sufficient grip to prevent slippage.
Solution Approach 2:
The nipping force parameter is made variable through the deflection capability of the first support member. By changing the assembly state (such as the degree of deflection or positioning), the nipping force can be optimized for different paper types and conditions, preventing both slippage and paper breakage.
2Reliability
If the nipping force between the two rollers is increased to ensure firm gripping, then the continuous paper is gripped more firmly, but the continuous paper becomes distorted and breaks due to stress concentration
Solution Approach 1:
The flexible first support member allows the gripping force to adapt dynamically to the paper's properties, preventing excessive force that would cause distortion while maintaining sufficient grip for reliable feeding.
Solution Approach 2:
By adjusting the assembly state of the first support member, the nipping force parameter can be optimized to match different paper types, ensuring firm gripping without causing paper distortion or stress concentration.
3Reliability
If the nipping force is set high to prevent slippage, then slippage between rollers and paper is reduced, but assembly errors cause excessive tension and paper breakage
Solution Approach 1:
The flexible first support member compensates for assembly variations by allowing deflection, making the nipping force less sensitive to assembly precision errors while maintaining reliable slippage prevention.
Solution Approach 2:
The flexibility of the first support member acts as a cushion that absorbs the effects of assembly errors before they can translate into excessive nipping forces that would break the paper.
4Device complexity
If a fixed rigid support structure is used for the rollers, then the structure is simple and stable, but the nipping force varies due to assembly errors
Solution Approach 1:
Replacing the rigid support with a flexible first support member adds minimal complexity while significantly improving nipping force consistency by allowing the structure to adapt to assembly variations.
Solution Approach 2:
The flexible support member allows the nipping force parameter to self-adjust based on assembly state, compensating for manufacturing tolerances and ensuring consistent performance.
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
Stabilizes nipping force and prevents paper breakage by suppressing variations due to assembly errors, enabling easy setting of appropriate force levels based on paper type.
Implementation Method 1
the first roller nips the continuous paper with the second roller by a deflection reaction force of the first support member
Data Source
AI summary
A feed roller mechanism that feeds a continuous paper while nipping the continuous paper between a first roller and a second roller that face each other, the feed roller mechanism includes a plate-shaped first support member that supports the first roller, and a plate-shaped second support member that supports the first support member, wherein the first roller nips the continuous paper with the second roller by a deflection reaction force of the first support member.