Electrophotographic Belt Groove Depth Variation for Cleaning Uniformity
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Solution Overview
Problem
Electrophotographic belts experience uneven cleaning due to groove shallowness at ends, leading to frictional differences and uneven cleaning properties over time, causing premature wear and reduced cleaning efficiency.
Innovation Solution
The electrophotographic belt features grooves on its outer surface, divided into three areas with specific depth and width ratios, ensuring deeper grooves at ends to match higher pressing forces, preventing early wear and maintaining uniform cleaning across the width direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If grooves are formed uniformly across the electrophotographic belt surface, then manufacturing is simplified, but cleaning becomes uneven over time due to differential wear at the ends
Solution Approach 1:
The groove depth is made non-uniform across the width of the electrophotographic belt, with deeper grooves at the end portions and shallower grooves in the central portion. This local variation in groove depth compensates for the differential pressing forces applied by the cleaning blade, ensuring uniform cleaning performance across the entire belt surface despite the simplified uniform groove formation process.
2Productivity
If the cleaning blade applies pressing force to remove toner, then cleaning efficiency improves, but groove wear increases at the ends due to higher friction
Solution Approach 1:
The groove depth is varied locally across the belt width, with deeper grooves positioned at the end portions where the cleaning blade applies higher pressing force. This local adaptation allows the grooves to withstand the increased friction and wear in these high-stress areas, extending the operational life of the electrophotographic belt while maintaining effective cleaning throughout.
3Reliability
If groove depth is increased at the ends to prevent wear, then cleaning uniformity improves, but manufacturing complexity increases
Solution Approach 1:
The groove depth is designed to vary locally across the belt width, creating a gradient from deeper grooves at the ends to shallower grooves in the center. This controlled variation in groove depth achieves uniform cleaning performance by compensating for differential wear patterns, while the gradual transition minimizes manufacturing complexity compared to more complex geometric variations.
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
This configuration prevents groove wear at ends, reducing frictional differences and ensuring consistent cleaning performance over long-term usage, enabling stable high-quality image formation.
Implementation Method 1
Toner that remains on an outer surface of an electrophotographic belt even after a secondary transfer is normally cleaned using a cleaning member such as a cleaning blade
Data Source
AI summary
An electrophotographic belt that, despite long-term usage, is not susceptible to unevenness in cleaning by a cleaning blade in a width direction. The electrophotographic belt has an endless shape and has grooves on an outer circumferential surface thereof, the grooves each extending in a circumferential direction of the electrophotographic belt, when equally dividing a groove-formed area of the outer circumferential surface into three areas in a direction orthogonal to the circumferential direction of the electrophotographic belt, and calculating average values of depths of the grooves contained in the three areas respectively to obtain Dm, De1 and De2, where Dm is an average value of depths of the grooves in a central area, De1 and De2 are average values of depths of the grooves contained in both ends areas,Dm, De1 and De2 satisfy equations (1) and (2):Dm<De1 (1)Dm<De2 (2).