Regulating Blade Cleaning Member for Toner Accumulation
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Solution Overview
Problem
In high-speed electrophotographic image forming apparatuses, toner float and accumulation occur near the developing roller and trimming blade, leading to image failures due to the complexity of device configurations and the use of two-component developers, where toner is not efficiently removed, causing it to condense and attach to the developing roller.
Innovation Solution
A developing device with a toner supply roller forming a magnetic brush, a regulating blade, and a cleaning member that reciprocates along the longitudinal direction of the regulating blade to remove accumulated toner, ensuring effective toner removal and prevention of toner drop on the developing roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a two-component developer is used with high-speed processing, then productivity is improved, but toner accumulation occurs on the regulating blade causing image failures
Solution Approach 1:
The cleaning member performs preliminary cleaning action on the regulating blade by reciprocating along its longitudinal direction to remove accumulated toner before it can condense and attach to the developing roller, preventing image failures while maintaining high-speed processing capability
2Productivity
If the developing roller rotates at high speed, then productivity is improved, but toner float occurs and accumulates at the periphery of the trimming blade
Solution Approach 1:
The cleaning member converts the harmful effect of toner accumulation into a manageable condition by continuously removing floated toner from the regulating blade surface, preventing it from condensing and attaching to the developing roller, thus maintaining high-speed operation without image failures
3Device complexity
If a simple device configuration is used, then device complexity is reduced, but toner removal efficiency is insufficient
Solution Approach 1:
The cleaning member is designed to automatically reciprocate along the longitudinal direction of the regulating blade, performing self-service cleaning without requiring complex external control systems or additional actuators, thus maintaining simple device configuration while ensuring effective toner removal
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 solution effectively reduces toner accumulation and drop on the developing roller, preventing image failures by ensuring continuous toner supply and removal, thus maintaining image quality and device efficiency.
Implementation Method 1
The toner supply roller forms a magnetic brush made of a two-component developer including a magnetic carrier and a toner on an outer peripheral surface of the toner supply roller
Data Source
AI summary
A developing device includes a developing roller, a toner supply roller, a regulating blade, a casing, and a cleaning member. The developing roller supplies a toner to the image carrier in a region opposed to an image carrier. The toner supply roller is located opposed to the developing roller. The toner supply roller forms a magnetic brush made of a two-component developer including a magnetic carrier and a toner on an outer peripheral surface to supply a toner to the developing roller in a region opposed to the developing roller. The regulating blade is located opposed to the toner supply roller at a predetermined interval. The casing houses the developing roller, the toner supply roller, and the regulating blade. The cleaning member reciprocates along a longitudinal direction of the regulating blade so as to remove a toner accumulated on a top surface of the regulating blade.