Variable Gloss Reduction via Textured Roller and Fuser Oil
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Solution Overview
Problem
Toner-based print engines produce glossy images due to the inherent properties of toner and fusing processes, limiting gloss reduction and requiring multiple toner formulations, which is expensive and time-consuming to switch between.
Innovation Solution
A method and apparatus using a textured roller with adjustable heat and pressure to imprint a high-frequency texture onto the toner surface, reducing specular gloss and enabling a single toner formulation to produce varying gloss levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If toner formulation is changed to reduce gloss, then gloss level is reduced, but manufacturing complexity and supply chain requirements increase
Solution Approach 1:
The patent changes the physical state parameter of toner by melting it to a liquid state and then controlling its solidification process. By adjusting cooling rate and temperature parameters, the same toner formulation can produce different surface gloss levels without requiring multiple toner formulations, thus resolving the contradiction between gloss reduction and manufacturing complexity
Solution Approach 2:
The patent replaces the chemical approach (different toner formulations) with a physical approach (controlled cooling and solidification process). This substitution eliminates the need for multiple toner stockpiles and simplifies the supply chain while achieving variable gloss levels
2Adaptability or versatility
If multiple toner formulations are used to achieve different gloss levels, then gloss variability is improved, but switching time and operational complexity increase
Solution Approach 1:
The patent makes a single toner formulation multi-functional by demonstrating that one toner type can produce multiple gloss levels through different cooling rates and solidification conditions. This eliminates the need to switch between different toner formulations, saving time and operational complexity while maintaining gloss level variability
3Strength
If toner is melted to liquid state for adherence, then adhesion quality is improved, but surface smoothness and gloss increase
Solution Approach 1:
The patent applies periodic cooling to the liquid toner after fusing, creating controlled solidification waves that prevent excessive surface smoothing while maintaining adhesion. The periodic thermal action allows the toner to solidify in a way that retains some surface texture, reducing gloss while preserving the bonding strength achieved during the liquid state
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
Effectively reduces gloss without the need for multiple toner formulations, allowing for adjustable gloss levels through software control, enhancing print quality and reducing production costs.
Implementation Method 1
through application of a combination of heat and pressure with a textured roller
Implementation Method 2
The liquid state of the toner results in a very smooth surface
Implementation Method 3
through application of a combination of heat and pressure with a textured roller, reduces the specular gloss of the toner surface by imprinting a high frequency texture
Data Source
AI summary
Various variable gloss reduction techniques are disclosed. In one embodiment, a gloss reduction technique is disclosed using a textured roller and a wiper impregnated with fuser oil to create a differential gloss pattern that reduces the gloss of an image printed on a substrate. In one embodiment, a gloss reduction technique is disclosed using a combination of heat and pressure to create a differential gloss pattern that reduces the gloss in specific regions of an image printed on a substrate. In one embodiment, a gloss reduction technique is disclosed using a differential gloss pattern to generate a security mark on a printed image to prevent against copying or fraudulent misrepresentation of the image.