Print Head Air Inclusion Detection via Ink Channel Resistance
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Solution Overview
Problem
Air inclusion in print heads of inkjet printing devices leads to negative effects on print quality, necessitating an efficient and reliable detection method.
Innovation Solution
A method and device that determine resistance information of ink supply channels to identify air inclusion in print heads, allowing for targeted regeneration measures to remedy the issue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air inclusion is not detected, then print quality deteriorates, but implementing detection increases device complexity
Solution Approach 1:
The patent replaces complex optical or sensor-based detection systems with a simple electrical resistance measurement system. By measuring the electrical resistance of the ink supply channel, the system can detect air inclusions without requiring sophisticated mechanical or optical detection apparatus, thus maintaining high reliability while minimizing device complexity
Solution Approach 2:
The patent introduces electrical resistance as an intermediary parameter to detect air inclusions. Instead of directly detecting the presence of air, the system measures the change in electrical resistance caused by air bubbles in the ink channel, which serves as a reliable indirect indicator of air inclusion while simplifying the detection mechanism
2Reliability
If all print heads are regenerated to remove air inclusion, then print quality improves, but resource usage increases
Solution Approach 1:
The patent applies local quality by selectively regenerating only those print heads that are detected to have air inclusions, rather than regenerating all print heads uniformly. This targeted approach maintains high print quality by addressing only the affected print heads while minimizing unnecessary resource consumption on print heads that do not require regeneration
Solution Approach 2:
The system identifies and isolates only the specific print heads with air inclusions for regeneration, effectively discarding the assumption that all print heads need treatment. This selective recovery process optimizes resource usage by applying regeneration measures only where necessary, reducing overall energy and material consumption
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
Enables early and reliable detection of air inclusion, improving print quality by selectively addressing affected print heads and optimizing resource usage.
Implementation Method 1
The device is configured to determine resistance information with respect to an electrical resistance of one or more ink supply channels of a print head group
Data Source
AI summary
A device is described for detecting a print head group of a print bar of an inkjet printing device having an air inclusion. The device determines resistance information with respect to the internal resistance of one or more ink supply channels of a print head group of the print bar and, based on the resistance information, determines whether or not the print head group has an air inclusion.