Wiper Assembly for Liquid Electrophotography Roller Cleaning
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Solution Overview
Problem
In liquid electrophotography (LEP) printing systems, there is a challenge in effectively managing and reusing unused print agent, as it often remains on developer rollers and is not efficiently transferred to the photo imaging plate, leading to inefficiencies and waste.
Innovation Solution
The implementation of a print agent application assembly that includes a cleaner roller and a sponge roller with absorbent material, along with a wiper assembly to remove and absorb unused print agent, allowing it to be reused by draining into an ink capture tray for reintegration into the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a wiper assembly is used to remove unused print agent from the developer roller, then the print agent transfer efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent combines the wiper blade, wiper blade support, and adjustment mechanism into a single integrated wiper assembly unit that can be easily attached to and removed from the developer roller. This merging of components achieves effective print agent removal while maintaining ease of installation and replacement, thus improving transfer efficiency without significantly increasing overall device complexity.
Solution Approach 2:
The wiper assembly is designed with an adjustment mechanism that allows operators to easily modify the wiper blade position and pressure directly on the device. This self-service capability enables optimization of print agent transfer efficiency without requiring complex external adjustment systems or specialized tools, balancing effectiveness with operational simplicity.
2Reliability
If multiple components are used for roller cleaning and ink management, then the cleaning effectiveness is improved, but the ease of operation deteriorates
Solution Approach 1:
The cleaning system is segmented into modular components: a wiper blade for surface cleaning, a wiper blade support for structural stability, and an adjustment mechanism for optimization. These segmented components work together to achieve effective cleaning while allowing individual replacement and adjustment, improving maintenance ease without sacrificing cleaning effectiveness.
Solution Approach 2:
The wiper assembly incorporates an adjustment mechanism that allows dynamic modification of the wiper blade position and contact pressure with the developer roller. This dynamic adjustability enables operators to optimize cleaning effectiveness for different operating conditions while maintaining ease of operation through simple manual adjustments rather than fixed rigid configurations.
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 the efficient transfer of print agent, reduces waste, and allows for the reuse of unused ink, enhancing the overall efficiency and cost-effectiveness of the LEP printing process by utilizing a single-component wiper assembly for roller cleaning and ink management.
Implementation Method 1
a sponge roller with absorbent material, along with a wiper assembly to remove and absorb unused print agent
Data Source
AI summary
A print agent application assembly is disclosed. The print agent application assembly may include a first roller to remove print agent from a surface of a print agent transfer roller. The print agent application assembly may include a second roller having an absorbent element to engage the first roller as the second roller rotates relative to the first roller, the absorbent element to absorb print agent from the first roller. The print agent application assembly may include a wiper assembly. The wiper assembly may include a wiper element to scrape print agent from the surface of the first roller as the first roller rotates, and an engagement element to engage with and compress a portion of the absorbent element of the second roller as the second roller rotates relative to the wiper assembly. A method and a roller cleaning assembly are also disclosed.