Printing Apparatus Reactant Liquid Ejection Control
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Solution Overview
Problem
Ink jet printing systems face a decrease in abrasion resistance when excessive reactant liquid is ejected, particularly when using non-absorbent media like polyvinyl chloride, leading to reduced print quality.
Innovation Solution
A control system adjusts the ejection duty of the reactant liquid based on the ink ejection duty to maintain optimal print quality and abrasion resistance, with specific ratios set for different ink ejection levels, and an optional heating mechanism to reduce reactant liquid consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If excessive reactant liquid is ejected to improve ink fixing properties, then the fixing properties of ink to medium are improved, but the abrasion resistance of printed images deteriorates
Solution Approach 1:
The patent implements dynamic control of reactant liquid ejection by adjusting the ejection duty ratio based on the ink ejection duty ratio. The control section dynamically modifies the reactant liquid ejection amount according to the actual printing conditions and ink ejection patterns, transitioning from static fixed ejection to adaptive dynamic ejection that optimizes both fixing properties and abrasion resistance
Solution Approach 2:
The patent changes the ejection duty ratio parameter of the reactant liquid based on the ink ejection duty ratio. By adjusting this parameter, the system optimizes the reactant liquid ejection amount to maintain appropriate proportions between ink and reactant liquid, thereby improving both fixing properties and abrasion resistance through parameter optimization
2Reliability
If excessive reactant liquid is ejected to enhance ink fixation, then the ink fixing properties are improved, but the amount of reactant liquid consumed increases
Solution Approach 1:
The patent applies partial action by ejecting only the necessary amount of reactant liquid based on actual printing conditions rather than excessive ejection. The control section calculates appropriate ejection duties that provide sufficient fixing without waste, implementing precise controlled ejection that matches actual ink ejection patterns and medium characteristics
Solution Approach 2:
The system implements feedback control by monitoring ink ejection duty ratios and using this information to adjust reactant liquid ejection accordingly. The control section continuously adapts the reactant liquid ejection amount based on actual printing conditions, ensuring optimal fixing properties while minimizing reactant liquid consumption through closed-loop control
3Reliability
If reactant liquid ejection amount is increased to maintain print quality, then the fixing properties are improved, but the abrasion resistance deteriorates particularly on non-absorbent media
Solution Approach 1:
The patent applies local quality control by adjusting reactant liquid ejection based on local printing conditions including ink ejection duty ratios and medium characteristics. The control section modifies ejection parameters according to specific printing scenarios, providing optimized fixing and abrasion resistance for different regions and conditions rather than uniform ejection
Solution Approach 2:
The system dynamically adapts reactant liquid ejection to match actual printing conditions and ink ejection patterns. By transitioning from static to dynamic ejection control, the system maintains appropriate reactant liquid to ink ratios under varying conditions, optimizing both print quality and abrasion resistance without excessive ejection
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 effectively suppresses the fall in abrasion resistance while maintaining print quality by optimizing the ejection duties and reducing reactant liquid consumption through controlled ejection and heating.
Implementation Method 1
a heating section that heats a medium on which the reactant liquid and the ink have landed
Data Source
AI summary
A printing apparatus includes a liquid ejecting section that is capable of ejecting a reactant liquid and an ink, and a control section that controls operation of the liquid ejecting section. The control section sets an ejection duty of the reactant liquid according to an ejection duty of the ink.