Imaging Device Fluid Removal via Mechanical Rollers
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Solution Overview
Problem
Existing imaging methods in digital lithography require energy-intensive thermal evaporation processes for removing carrier fluids, which are inefficient and environmentally harmful due to volatile organic compound emissions.
Innovation Solution
The use of mechanical 'cold' processes, such as reverse and forward rollers, to separate and remove carrier fluids from imaging drums, reducing energy consumption and minimizing VOC emissions by employing non-contact methods like reverse rollers and blades for efficient fluid removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If thermal evaporation processes are used to remove carrier fluids, then complete fluid removal can be achieved, but energy consumption increases significantly and VOC emissions occur
Solution Approach 1:
The patent replaces thermal evaporation processes with mechanical removal methods. Specifically, it uses a reverse roller that rotates in the opposite direction to the imaging drum to mechanically strip carrier fluid, and a forward roller that rotates in the same direction to collect and remove fluid. This mechanical substitution eliminates the need for high-energy thermal fields while achieving complete fluid removal without VOC emissions.
Solution Approach 2:
The patent extracts the carrier fluid removal function from the thermal evaporation system and implements it through dedicated mechanical rollers. The reverse roller extracts fluid through counter-rotation, and the forward roller extracts fluid through co-rotation and collection, separating the removal function from thermal processing entirely.
2Loss of energy
If mechanical cold processes are used to remove carrier fluids, then energy consumption and VOC emissions are reduced, but image stiffness may be compromised
Solution Approach 1:
The patent applies preliminary charging to the imaging drum before carrier fluid application. This pre-established electrostatic field creates strong attraction forces that hold the image in place during subsequent mechanical fluid removal, preventing image displacement or loss of stiffness despite the gentle cold process removal.
Solution Approach 2:
The patent introduces charged particles as an intermediary force field between the imaging drum surface and the carrier fluid. This electrostatic intermediary creates strong adhesion that counteracts the mechanical disruption from roller contact, maintaining image integrity during cold process 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
This approach significantly reduces energy usage and VOC emissions, enabling faster and more environmentally friendly image formation and transfer processes with improved image quality by maintaining image stiffness and preventing smearing.
Implementation Method 1
mechanical 'cold' processes, such as reverse and forward rollers, to separate and remove carrier fluids from imaging drums
Implementation Method 2
forward rollers, to separate and remove carrier fluids from imaging drums
Data Source
AI summary
An imaging device can include an imaging drum to support a carrier fluid. A roller can remove a portion of the carrier fluid from the imaging drum. A fluid container can collect the carrier fluid from the roller. A fluid remover on the container can be used to remove the carrier fluid from the roller.