Asymmetric Reclosable Pouch Closure Mechanisms
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Solution Overview
Problem
Existing reclosable pouch closures with multiple interlocking profiles lack efficient mechanisms to guide users during closure and provide varying resistance to opening forces, leading to inconsistent closing and opening experiences.
Innovation Solution
A reclosable pouch design featuring multiple closure mechanisms with strategically spaced and asymmetric male and female profiles, allowing for guided closure and differential resistance to opening forces by varying leg lengths and hook configurations, which reduces the force required for closure and adjusts opening forces based on profile asymmetry and thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple closure mechanisms are placed close together, then the user can concurrently close them easily, but the mechanisms may contact each other causing interference
Solution Approach 1:
The closure system is divided into multiple independent closure mechanisms (first, second, and third) that are spaced apart along the pouch opening. Each mechanism operates independently with its own male and female profiles, allowing concurrent closure without interference while maintaining ease of use.
2Reliability
If closure mechanisms are spaced far apart, then they operate independently without interference, but the user cannot easily close them concurrently
Solution Approach 1:
The spacing between closure mechanisms is optimized to a specific range that balances independence and concurrent operability. The mechanisms are spaced far enough to operate independently but close enough to be closed simultaneously by the user, achieving both reliability and ease of operation.
3Ease of manufacture
If symmetrical profiles are used, then the closure mechanism is simple to manufacture, but it provides uniform resistance to opening forces in both directions
Solution Approach 1:
The closure profiles are designed with asymmetrical geometries where the male profile has a specific shape that engages with the female profile to provide different resistance levels to opening forces applied from different directions. This asymmetry allows the closure to resist opening forces differently based on the direction and source of the force.
4Ease of manufacture
If all profiles have the same dimensions, then the closure mechanism is consistent to manufacture, but it cannot provide varying resistance to different opening forces
Solution Approach 1:
Different profiles within the closure mechanism have different dimensions and geometries tailored to their specific functions. The male and female profiles have complementary shapes and sizes that enable them to provide varying resistance to opening forces while maintaining manufacturing consistency through precise dimensional control.
Data Source
AI summary
A reclosable pouch comprises a body portion having first and second pouch walls. A first closure mechanism is disposed on internal sides of the first and second walls. The first closure mechanism includes a first female profile having first and second spaced legs and a first male profile. A second closure mechanism is disposed on the internal sides of the first and second pouch walls. The second closure mechanism includes a second female profile having third and fourth spaced legs and a second male profile. One of the first, second, third, or fourth spaced legs is longer than the other leg of the same female profile. Further, the first and second closure mechanisms comprise differing opening and closing characteristics.