Integrated Kogation and Ink Concentration Control
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Solution Overview
Problem
Existing printing technologies face issues with decreased productivity and increased waste ink due to the instability of ink ejection characteristics caused by kogation and ink concentration changes, as they rely on separate techniques for kogation control and ink concentration adjustment.
Innovation Solution
A printing apparatus that integrates kogation control and ink concentration adjustment through a control unit that consecutively executes ink discharge for both controls, using the discharge in one control to aid the other, thereby reducing downtime and waste ink.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate techniques are used for kogation control and ink concentration adjustment, then each control function is achieved, but productivity decreases and waste ink increases due to increased downtime
Solution Approach 1:
The patent combines kogation control and ink concentration adjustment into a single integrated process. The control unit executes both controls consecutively by utilizing the ink discharge operation for dual purposes: first for kogation control (removing accumulated ink residues from heating elements) and then for concentration adjustment (replenishing ink in the circulation path). This merging eliminates the need for separate maintenance cycles, thereby maintaining ink ejection stability while preventing productivity loss and waste ink generation
2Reliability
If separate techniques are used for kogation control and ink concentration adjustment, then each control function is achieved, but the amount of waste ink increases
Solution Approach 1:
The patent merges kogation control and ink concentration adjustment into one consecutive operation sequence. The ink discharged during kogation control is immediately reused for concentration adjustment, eliminating the need to discard ink after kogation removal. This approach maintains reliable ink ejection characteristics while minimizing waste ink, as the same ink volume serves dual functions rather than being wasted after a single purpose
3Reliability
If kogation control is performed by ejecting and discharging ink, then kogation is removed from heating elements, but ink concentration in the circulation path changes
Solution Approach 1:
The patent implements a feedback mechanism where the control unit monitors ink concentration changes resulting from kogation control discharge. After executing kogation control that discharges ink from the circulation path, the system automatically performs concentration adjustment by supplying fresh ink to restore the original concentration level. This feedback loop ensures that heating element performance is maintained through effective kogation removal while ink concentration stability is preserved through automatic replenishment
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 integrated approach stabilizes ink ejection characteristics, reduces downtime, and minimizes waste ink, enhancing productivity and efficiency in printing operations.
Implementation Method 1
the ink is ejected from nozzles using thermal energy generated by heating elements
Implementation Method 2
a circulation path configured to circulate the ink so as to supply the print unit with the ink and resupply the print unit with the ink which flows out from the print unit
Implementation Method 3
evaporation of a liquid component in the ink from the nozzles is promoted, so that the concentration of the circulating ink is increased
Data Source
AI summary
A printing apparatus including a print unit to perform printing by ejecting ink by driving a heating element and a circulation path to circulate the ink to supply the print unit with the ink and resupply the print unit with the ink from the print unit includes a control unit to perform a first control of causing kogation adhesion to a protective layer covering the heating element by ejecting the ink through the nozzle, and a second control of making ink concentration adjustment in the circulation path by ejecting the ink from the nozzle for ink discharge from the circulation path and supplying the circulation path with an amount of the ink corresponding to the ink discharge amount. In consecutive execution of the first and second controls, the control unit uses the ink discharge in one of the controls for the ink discharge in the other control.