Microcellular Cleaning Roller for LEP Ink Transfer Debris Removal
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Solution Overview
Problem
Existing devices for removing debris from liquid electrophotographic (LEP) ink transfer surfaces, such as photoconductive surfaces or intermediate transfer members, often face difficulties in complete debris removal and can cause damage to the cleaning rollers, leading to degradation in print quality and surface damage.
Innovation Solution
A cleaning unit comprising a cleaning roller with a microcellular material outer layer that absorbs cleaning fluid and prevents incorporation of debris, combined with an extractor to remove cleaning fluid and debris using a vacuum source, effectively addresses the issue of debris removal without damaging the cleaning roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sponge roller is used to remove debris from the LEP ink transfer surface, then debris removal capability is improved, but the sponge roller may be damaged and debris may be re-deposited on the surface
Solution Approach 1:
The patent extracts the harmful function of squeezing the sponge roller by introducing a separate extractor component. The extractor uses a vacuum source to remove cleaning fluid and debris from the sponge roller without mechanical squeezing, thereby preventing roller damage and debris re-deposition while maintaining effective debris removal capability
Solution Approach 2:
The patent applies pneumatic principles by using a vacuum source connected to the extractor to create negative pressure for removing cleaning fluid and debris from the sponge roller. This replaces the mechanical squeezing action with a pneumatic extraction process, eliminating damage to the roller while achieving complete debris removal
2Quantity of substance
If the sponge roller is squeezed to remove cleaning fluid and debris, then cleaning fluid removal is improved, but the sponge roller may be damaged
Solution Approach 1:
The patent extracts the fluid removal function from mechanical squeezing by introducing an extractor with vacuum source. This separate extraction mechanism removes cleaning fluid and debris from the sponge roller without applying mechanical stress that would damage the roller structure
Solution Approach 2:
The patent replaces the mechanical squeezing system with a pneumatic extraction system. The vacuum source creates negative pressure to draw out cleaning fluid and debris, substituting the mechanical compression action with a pneumatic field-based process that preserves roller integrity
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 ensures complete removal of debris from the cleaning roller, preventing re-deposition on the LEP ink transfer surface and maintaining print quality, while also preventing damage to the cleaning roller and the transfer surface.
Implementation Method 1
a cleaning roller comprising a microcellular material outer layer that absorbs cleaning fluid and prevents incorporation of debris
Implementation Method 2
an extractor to remove cleaning fluid and debris particles from the cleaning roller
Data Source
AI summary
A cleaning unit for removing debris from an ink transfer surface includes a cleaning roller having: a microcellular material outer layer; a wetting module to supply cleaning fluid to the microcellular material outer layer of the cleaning roller; and an extractor to remove cleaning fluid and debris from the cleaning roller.