Liquid Container Manufacturing Using Differential Pressure Valve
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Solution Overview
Problem
Existing ink cartridges face inefficiencies in ink injection and resource utilization, particularly when residual ink levels are low, leading to wasteful disposal and complex manufacturing processes due to the need for an ink injecting-only hole.
Innovation Solution
A method for manufacturing liquid containers that uses the liquid supply port to inject ink into the containing chamber by forcibly opening a differential pressure valve using a jig, eliminating the need for an ink injecting-only hole and allowing for resource reuse when ink levels are low.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an ink injecting-only hole is formed in the container body to inject ink into the ink containing chamber, then ink can be injected into the chamber, but the manufacturing process becomes complicated and additional sealing films are required
Solution Approach 1:
The liquid supply port is designed to serve dual purposes: as the primary interface for supplying liquid to the liquid jetting apparatus during normal operation, and as the injection port for introducing liquid into the containing chamber during manufacturing. This eliminates the need for a separate ink injecting-only hole and its associated sealing requirements, thereby simplifying both the manufacturing process and device structure.
2Ease of operation
If the differential pressure valve is normally closed to prevent ink leakage, then unnecessary ink does not leak, but the valve cannot be opened to inject ink during manufacturing without additional equipment
Solution Approach 1:
A jig is introduced as a preliminary tool to forcibly open the differential pressure valve during the manufacturing injection process. The jig temporarily overcomes the valve's normal closed state, allowing liquid to be injected into the containing chamber. After injection, the jig is removed and the valve returns to its normal closed state, maintaining leak prevention functionality without requiring permanent structural modifications or complex equipment.
3Reliability
If the container is disposed when residual ink decreases to avoid poor ink supply, then ink supply quality is maintained, but resource wastage occurs
Solution Approach 1:
Instead of discarding the container when residual ink decreases, the invention enables recovery and reuse of the same container. The liquid supply port is used to inject additional liquid into the containing chamber, allowing the container to be refilled and reused multiple times. This maintains reliable ink supply quality while eliminating resource wastage associated with single-use containers.
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 method enables efficient ink injection and reuse of the liquid container by using the existing supply port, simplifying the manufacturing process, reducing waste, and lowering equipment costs by avoiding the need for additional valve opening equipment.
Implementation Method 1
a differential pressure valve, which is interposed in the way of the ink flow passage, is normally urged to a closed state while changed to an opened state when a differential pressure between a side of the ink supply port and a side of the ink containing chamber is equal to or more than a predetermined value
Implementation Method 2
pressing a valve body of the differential pressure valve in a direction in which the differential pressure valve is opened
Data Source
AI summary
A method of manufacturing a liquid container, the liquid container including a liquid containing chamber in which a liquid can be contained, an air communicating passage allowing the liquid containing chamber to communicate with the air, a liquid supply port for supplying the liquid contained in the liquid container to an outside, a liquid flow passage allowing the liquid container and the liquid supply port to communicate with each other, a valve accommodating chamber disposed in the liquid flow passage, a differential pressure valve which is disposed in the valve accommodating chamber, which is normally urged to a closed state, and which is changed from the closed state to an opened state when a differential pressure of a side of the liquid supply port and a side of the liquid containing chamber is equal to or more than a predetermined value, and a film member forming a part of the valve accommodating chamber, the method includes: pressing a valve body of the differential pressure valve in a direction in which the differential pressure valve is opened; and injecting the liquid from the liquid supply port to the liquid containing chamber via the liquid flow passage while maintaining the opened state of the differential pressure valve.