Ink Storage Bag Spout Sealing Without Weld Leakage
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Solution Overview
Problem
Existing methods for manufacturing liquid storage bags, such as ink storage bags, require welding to seal openings after refilling, which can lead to potential ink leakage if the welding is defective.
Innovation Solution
The design includes a spout with a first opening for discharging ink, a second opening for refilling, and a seal member that seals the second opening in an openable and closable manner, eliminating the need for welding and preventing ink leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If welding is used to seal the opening after refilling, then the opening can be closed, but ink leakage may occur if the welding is defective
Solution Approach 1:
The patent introduces a cap as an intermediary component that seals the opening mechanically rather than through welding. The cap fits onto the spout structure and provides a reliable seal without requiring welding operations, thereby eliminating the risk of welding defects causing ink leakage.
Solution Approach 2:
The patent replaces the welding process (thermal/mechanical bonding) with a mechanical cap-based sealing system. This substitution eliminates the complexity and reliability issues associated with welding while maintaining effective sealing functionality through simple mechanical interference fit.
2Reliability
If a cap is added to seal the opening, then ink leakage is prevented, but device complexity increases
Solution Approach 1:
The patent merges the cap function with the existing spout structure. The spout is designed with an integrated threading or fitting structure that directly accepts the cap, eliminating the need for separate mounting components and reducing overall structural complexity despite adding the sealing function.
Solution Approach 2:
The spout structure serves multiple functions: it provides the opening for refilling, incorporates the sealing mechanism through integrated threading, and interfaces with the cap. This multi-functionality reduces the need for additional components that would otherwise be required for sealing.
Data Source
AI summary
An ink storage bag includes a bag body configured to store an ink, and a spout fixed to the bag body. The spout includes a first opening configured to discharge the ink from an inside of the bag body to an outside, a second opening configured to refill the inside of the bag body with the ink from the outside and formed at a fixing portion at which the spout and the bag body are fixed to each other, and a seal member configured to seal the second opening in an openable and closable manner.