Ink Container Filter Protection from Welding Stress
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Solution Overview
Problem
Conventional liquid holding containers, such as ink cartridges, face issues with ink supply obstruction due to damage to filters caused by the welding process, which applies pressure and heat, leading to compromised sealing and potential blockages.
Innovation Solution
The design includes a flow path that extends beyond the junction of sheet members, positioning the filter inside the housing unit to avoid stress and potential damage, with a convex structure to maintain a gap between the sheet member and filter, ensuring uninterrupted ink delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If welding is used to adhere flexible sheet members, then sealing properties of the bag form pack are increased, but the filter may undergo pressurization or heating that damages it and obstructs liquid supply
Solution Approach 1:
The filter is extracted from the welding area by positioning it further inside the housing unit than the junction part where sheet members are welded. This separation removes the filter from the harmful pressurization and heating zones during the welding process, preventing damage while maintaining sealing integrity.
Solution Approach 2:
The flow path is segmented into different zones: the junction part where welding occurs and the flow path that extends further inside the housing unit where the filter is positioned. This segmentation allows the welding process to occur in one area without affecting the filter in another area, resolving the contradiction between sealing requirements and filter protection.
2Reliability
If the flow path extends further inside the housing unit than the junction part, then the filter is displaced from the welding area and protected from damage, but the structure becomes more complex
Solution Approach 1:
The flow path member is designed to integrate multiple functions: it serves as both the structural component that defines the flow path and the positioning element that protects the filter. By combining the flow path function with the filter protection function in a single integrated structure, the design avoids additional separate components while achieving filter protection through the extended flow path configuration.
Data Source
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AI summary
A liquid holding container having an ink pack constituted by a sheet member, capable of housing ink inside, a flow path member extending through the sheet member, between the outside and inside of the ink pack, and having a flow path capable of delivering ink from the inside to the outside of the ink pack, and a filter provided in the flow path member inside the ink pack. The flow path member and the sheet member are joined, and the flow path extends further to the inside of the ink pack than the end part which is the junction part at the position of the sheet member joined with the flow path member. At the flow path member, the filter is provided at a site further to the inside of the ink pack than the junction part.