Inkjet Recording Apparatus Ink Replacement Pulsation
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Solution Overview
Problem
Existing inkjet recording apparatuses face challenges in efficiently replacing ink in the ink flow path with new ink, leading to issues with ink mixability and increased ink consumption and replacement time.
Innovation Solution
The method involves generating pulsation in the ink flow path when introducing new ink into the system, utilizing a configuration that includes a sub-tank, an ink flow path, and a syringe to circulate and pulsate the new ink, thereby improving mixability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If new ink is introduced into the ink flow path without pulsation, then the ink replacement process is simple, but ink mixability deteriorates and ink consumption increases
Solution Approach 1:
The patent applies pulsation (mechanical vibration) to the ink flow path during ink replacement. The pulsation unit generates periodic pressure variations that agitate the ink mixture, enhancing the mixing between old and new ink. This mechanical vibration approach resolves the contradiction by improving ink mixability without requiring complex manual operations, thus reducing ink consumption while maintaining operational simplicity.
Solution Approach 2:
The patent employs periodic pulsation cycles during the ink replacement process. Instead of continuous or static ink introduction, the system applies periodic pressure pulses that create rhythmic flow patterns. This periodic action enhances ink mixing efficiency by repeatedly disrupting the flow and promoting thorough blending, thereby reducing the total ink volume needed for effective replacement while keeping the process automated and simple to operate.
2Ease of operation
If new ink is introduced into the ink flow path without pulsation, then the ink replacement process is simple, but ink replacement time increases
Solution Approach 1:
The pulsation unit generates mechanical vibrations in the ink flow path that accelerate the mixing process. By creating periodic pressure variations, the system rapidly blends old and new ink, significantly reducing the time required for complete ink replacement. This maintains operational simplicity while dramatically cutting replacement time compared to static or continuous flow methods.
Solution Approach 2:
The periodic pulsation cycles create repeated flow disruptions that speed up ink mixing. Each pulse cycle contributes to thorough blending, allowing the replacement process to complete in fewer cycles or shorter duration. This periodic action mechanism resolves the contradiction by enabling fast ink replacement without requiring complex manual intervention, thus reducing time loss while keeping the system easy to operate.
3Loss of substance
If pulsation is generated in the ink flow path during ink replacement, then ink mixability improves and ink consumption reduces, but the device complexity increases
Solution Approach 1:
The patent introduces a pulsation unit as an intermediary component between the ink supply and the ink flow path. This mediator generates the necessary pressure variations to enhance mixing without requiring direct complex manipulation of the ink flow itself. By placing this intermediate pulsation device, the system achieves improved ink mixability and reduced consumption while adding only one functional module, thereby limiting the increase in overall system complexity.
4Loss of time
If pulsation is generated in the ink flow path during ink replacement, then ink mixability improves and replacement time shortens, but the device complexity increases
Solution Approach 1:
The pulsation unit serves as an intermediary that generates time-efficient mixing action without requiring complex system reconfiguration. By inserting this single pulsation module into the existing ink flow path, the system achieves rapid ink replacement through periodic pressure variations. This approach shortens replacement time significantly while adding minimal complexity, as the pulsation unit operates independently without requiring major structural changes to the overall system.
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 enhances ink mixability, reduces ink consumption, and shortens the ink replacement time by effectively circulating and pulsating the new ink within the ink flow path.
Implementation Method 1
when the second ink is caused to flow from the sub-tank into the ink flow path, pulsation is generated in the ink flow path
Data Source
AI summary
Provided is an ink-replacement method for an inkjet recording apparatus that includes a recording head having an ink ejection surface on which a plurality of nozzles for ejecting ink onto a recording medium is arranged, a sub-tank for temporarily retaining the ink supplied from an ink container, and an ink flow path along which the ink circulates from and to the sub-tank by passing through the recording head. In replacing a first ink present in the ink flow path with a second ink to be newly supplied to the recording head via the ink flow path, when the second ink is caused to flow from the sub-tank into the ink flow path, pulsation is generated in the ink flow path.