Resealable Bag Closure Device Adaptive Sealing Misalignment
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Solution Overview
Problem
Existing resealable pouch closure devices with complementary male/female profiled elements fail to consistently achieve a reliable seal, particularly under stress and misalignment conditions, and do not effectively manage internal overpressure.
Innovation Solution
The introduction of additional profiled elements with a rounded convex protrusion and complementary concave cradle, integrated with support webs that can be welded or coextruded with the pouch material, allowing for adaptive sealing and stress relief through foot connections, enabling perfect sealing even under misalignment and varying internal pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional complementary male/female profiled elements are used for closure, then the device structure is simple, but the sealing reliability is insufficient under stress and misalignment conditions
Solution Approach 1:
The closure device is divided into multiple functional elements: traditional male/female profiled elements for basic closure, additional rounded convex protrusion elements for stress distribution, and foot connections for alignment correction. Each segment performs a specific function to collectively improve sealing reliability.
Solution Approach 2:
The rounded convex protrusion elements and foot connections are designed in advance to compensate for misalignment and stress conditions before sealing occurs. The foot connections provide preliminary alignment correction, and the rounded protrusions prepare stress distribution pathways before the sealing action takes place.
2Reliability
If additional profiled elements with rounded convex protrusion are added to improve sealing, then the sealing performance improves, but the device complexity increases
Solution Approach 1:
Multiple closure elements (traditional profiled elements, rounded convex protrusions, and foot connections) are merged into a single integrated closure device structure. This allows the complex functionality to be achieved within one unified component rather than requiring separate devices.
Solution Approach 2:
The additional profiled elements with rounded convex protrusions serve multiple functions: they distribute stress during sealing, compensate for misalignment through their geometric design, and work in conjunction with the foot connections to ensure proper positioning. This multi-functionality justifies the added structural elements.
3Adaptability or versatility
If foot connections are used to accommodate misalignment, then the adaptability improves, but the manufacturing complexity increases
Solution Approach 1:
The foot connections are designed with specific geometric parameters (length, angle, curvature) that allow them to flex and adapt to misalignment conditions. By optimizing these parameters during design, the structure achieves high adaptability while remaining manufacturable using standard molding or extrusion processes.
Data Source
Figure 1~7
AI summary
The device (100) has complementary closing elements (160, 170) e.g. hooks, a male element (110) provided with a projection (111) having an endless right round section, and a female element defining a complementary curved receiving bassinet or concave throat (121), where the device is operated by a slide. The male element and the female element are connected to support shells (112, 122) that are associated to each other by feet (113, 123), where the female element has a variable thickness wall.