Electrophoretic Developer Unit for Printing Liquid Concentration
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Solution Overview
Problem
Existing methods for concentrating printing liquid in electro-photography devices are inefficient, as they often result in unstable and non-uniform concentration, high maintenance costs, and the need for specialized equipment that is difficult to clean and calibrate, particularly in systems using centrifuges and electrodes.
Innovation Solution
A system that includes a conveyor and a developer unit to electrophoretically concentrate printing liquid, using a series of rollers and squeegee units to apply electrical and mechanical forces, allowing for stable and uniform concentration of non-volatile solids, with easy maintenance and high throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If centrifuges are used to concentrate printing liquid, then concentration is achieved, but the system becomes noisy, vibrates significantly, and requires difficult cleaning and calibration
Solution Approach 1:
The patent replaces the centrifugal mechanical system with an electrophoretic system using charged rollers and electric fields. Instead of using centrifugal force to separate and concentrate particles, the invention uses electrostatic attraction between charged rollers and oppositely charged printing liquid particles, eliminating the need for high-speed rotation and complex mechanical balancing.
Solution Approach 2:
The patent introduces charged intermediary rollers as mediators between the printing liquid and the concentration process. These rollers act as electrostatic attractors that draw particles onto their surfaces through electric field forces, providing a gentle and controllable concentration mechanism that avoids the harsh mechanical forces of centrifugation.
2Quantity of substance
If electrodes are used to concentrate printing liquid electrophoretically, then concentration is achieved, but the equipment becomes specialized and difficult to maintain
Solution Approach 1:
The patent employs simple, replaceable charged rollers instead of complex electrode assemblies. These rollers can be easily removed and replaced when worn or contaminated, eliminating the need for sophisticated electrode maintenance, calibration, and repair procedures while maintaining effective electrophoretic concentration.
Solution Approach 2:
The system design allows for easy self-maintenance through simple roller replacement without requiring specialized tools or expertise. The rollers are designed to be user-replaceable components that can be swapped out during routine maintenance intervals, making the system self-sufficient and reducing dependency on specialized service personnel.
3Quantity of substance
If centrifuges operate on small batches of printing liquid, then concentration is achieved, but the process takes a long time and has low throughput
Solution Approach 1:
The patent implements a continuous electrophoretic concentration process where printing liquid flows continuously through the charged roller system, allowing for uninterrupted concentration operation. Multiple rollers arranged in series enable continuous processing of large volumes, eliminating the batch-to-batch interruptions inherent in centrifugal systems and dramatically increasing throughput.
Solution Approach 2:
The patent transitions from the batch processing mode (single dimension of time) to continuous flow processing (adding the dimension of spatial throughput). By arranging charged rollers in a continuous sequence and maintaining steady liquid flow through the system, the invention achieves high-volume processing capability that operates independently of batch cycle times.
4Loss of energy
If dilute printing liquid is shipped, then shipping costs are high, but concentrating the liquid requires complex and expensive equipment
Solution Approach 1:
The patent replaces complex mechanical concentration equipment with a simple electrophoretic system using charged rollers and electric fields. This substitution dramatically reduces equipment complexity and cost while achieving effective concentration, making the process economically viable for reducing shipping volumes without requiring expensive specialized machinery.
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 system achieves a high concentration of non-volatile solids with reduced waste and lower shipping costs, providing a stable and uniform flow of concentrated printing liquid at a high rate with minimal maintenance requirements.
Implementation Method 1
A system that includes a conveyor and a developer unit to electrophoretically concentrate printing liquid, using a series of rollers and squeegee units to apply electrical and mechanical forces
Data Source
AI summary
An example system includes a conveyor. The conveyor is not a photoconductor. The system also includes a developer unit. The developer unit is to internally concentrate printing liquid. The developer unit also is to deliver the printing liquid to the conveyor. The system includes a wiper in contact with the conveyor. The wiper is to remove the printing liquid from the conveyor.