Coating Roller Toner Adjustment for Uniform Lubrication
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Solution Overview
Problem
The existing imaging systems face challenges in ensuring uniform lubricant application to the image carrier, leading to increased abrasion rates in non-image areas due to insufficient lubricant application, which affects the longevity and performance of the image carrier.
Innovation Solution
The implementation of a lubricant application device with a coating roller and a scraper mechanism that adjusts the toner amount on the coating roller's axial direction, ensuring a uniform lubricant layer across both image and non-image areas by selectively changing the toner amount on different portions of the coating roller, and utilizing a toner supply device to distribute additional toner for optimal lubricant application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coating roller is used to apply lubricant to the image carrier, then the image carrier surface is protected, but the lubricant application is non-uniform causing increased abrasion in non-image areas
Solution Approach 1:
The patent applies local quality by differentiating lubricant application between image and non-image areas. The coating roller is designed with varying toner amounts across its axial direction, creating different lubricant transfer characteristics for different zones of the image carrier. This ensures adequate lubrication in non-image areas while maintaining proper lubrication in image areas, resolving the uniformity issue.
Solution Approach 2:
The patent changes the parameter of toner amount distribution on the coating roller surface. By controlling the toner concentration to vary along the axial direction of the coating roller, the system adjusts the lubricant transfer rate dynamically across different zones, achieving uniform lubricant application despite the inherent non-uniformity of the coating process.
2Reliability
If toner amount on coating roller is increased to improve lubricant transfer, then lubrication is enhanced, but abrasion in non-image areas increases due to excessive lubricant
Solution Approach 1:
The patent implements local quality by creating spatial variation in toner amount across the coating roller surface. Different axial positions of the coating roller have different toner concentrations, which directly controls the lubricant transfer amount to specific zones of the image carrier. This prevents excessive lubricant application in non-image areas while ensuring adequate lubrication where needed.
Solution Approach 2:
The patent applies partial action by providing differentiated toner amounts rather than uniform distribution. The coating roller deliberately has higher toner concentration in regions corresponding to non-image areas and adjusted concentration in image areas, ensuring each region receives the appropriate amount of lubricant without excess, thereby preventing abrasion while maintaining protection.
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 solution ensures a substantially uniform lubricant layer across the image and non-image areas, reducing abrasion rates and extending the lifespan of the image carrier by maintaining optimal lubrication levels.
Implementation Method 1
a coating roller which transfers a lubricant from a lubricant source to a surface of the image carrier
Implementation Method 2
a toner adjustment element which adjusts a toner amount of the coating roller in an axial direction of the coating roller
Data Source
AI summary
An imaging system includes an image carrier to carry a toner image, a coating roller to transfer a lubricant from a lubricant source to a surface of the image carrier, the coating roller being disposed adjacent to the image carrier to receive a toner from the image carrier, and a toner adjustment element to adjust a toner amount of the coating roller in an axial direction of the coating roller.