Printer Printhead Spit Zone Ink Distribution
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Solution Overview
Problem
Inkjet printers face issues with the accumulation of semi-solid maintenance ink during spits, which can cause malfunctions and require additional mechanical components to manage, leading to increased costs and complexity.
Innovation Solution
The printhead assembly is moved during spits to distribute maintenance ink evenly throughout a designated spit zone, eliminating the need for mechanical components to manage ink accumulation and reducing part count, cost, and environmental sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical components are added to manage maintenance ink accumulation, then ink management reliability improves, but device complexity and cost increase
Solution Approach 1:
The printhead assembly serves dual functions: it both ejects ink during printing and distributes maintenance ink during spits. By moving the printhead to a designated spit zone and ejecting ink, the system self-manages maintenance ink distribution without requiring separate mechanical components, thus maintaining reliability while reducing complexity
Solution Approach 2:
The printhead assembly is designed to perform multiple functions: normal ink ejection during printing and maintenance ink distribution during spits. This multi-functionality eliminates the need for dedicated mechanical components to handle maintenance ink, resolving the contradiction between reliability and device complexity
2Object-generated harmful factors
If mechanical components are added to move accumulated maintenance ink, then ink accumulation problems are solved, but cost and device complexity increase
Solution Approach 1:
The system uses the existing printhead assembly and its movement capability to distribute maintenance ink throughout the spit zone. This self-service approach eliminates the need for additional mechanical components to move accumulated ink, thereby solving ink accumulation problems without increasing manufacturing cost
Solution Approach 2:
The patent extracts the function of managing maintenance ink from separate mechanical components and integrates it into the printhead assembly's existing movement and ejection capabilities. This extraction eliminates the need for additional parts while solving the ink accumulation problem
3Ease of operation
If mechanical components are added to manage maintenance ink, then ink distribution improves, but reliability decreases due to environmental sensitivity
Solution Approach 1:
The printhead assembly uses its own ejection mechanism and controlled movement to distribute maintenance ink evenly throughout the spit zone. This self-service approach relies on the already-tested and reliable printhead ejection system rather than introducing new mechanical components that would be sensitive to environmental factors, thus improving ink distribution while maintaining reliability
Data Source
AI summary
A printer includes a printhead assembly, a spit zone, and a controller. The printhead assembly includes nozzles to eject ink drops. The spit zone is to store maintenance ink. The controller is to move the printhead assembly over the spit zone while ink is ejected from the nozzles during spits.