Flexible Packaging Closure Retention Mechanism
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Solution Overview
Problem
Spouted pouch closures often detach and become dispersed in the environment after use, posing a problem for manufacturers seeking to maintain ease of use while adhering to environmental regulations.
Innovation Solution
A closure design that remains attached to the spout after use, featuring a grip surface with bulges and windows for easy handling, combined with a tamper-evident seal that ensures the closure remains fastened to the spout, allowing for convenient reuse and disposal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the closure is designed to be easily unscrewed from the spout, then ease of operation is improved, but the closure may detach and disperse in the environment after use
Solution Approach 1:
The closure assembly is divided into two functional parts: the closure cap that can be easily removed for opening, and the spout that remains attached to the pouch. The closure cap includes a grip surface for easy handling, while the spout maintains connection to the pouch through a retained attachment mechanism after the cap is unscrewed.
Solution Approach 2:
A grip surface is introduced as an intermediary element on the closure cap to facilitate easy grasping and removal. This grip surface includes bulges that provide tactile feedback and improved grip, allowing users to easily unscrew the closure while the spout remains securely attached to the pouch through its retention mechanism.
2Reliability
If the closure remains attached to the spout after unscrewing, then environmental dispersion is prevented, but ease of unscrewing may be compromised
Solution Approach 1:
The closure system is segmented into a removable closure cap and a retained spout assembly. The closure cap can be easily unscrewed for access, while the spout remains attached to the pouch through a dedicated retention mechanism that prevents environmental dispersion.
Solution Approach 2:
The spout assembly includes an automatic retention mechanism that activates when the closure cap is removed. The spout's attachment mechanism self-activates to maintain connection to the pouch, eliminating the need for additional user actions to ensure retention after opening.
3Ease of operation
If the closure is designed with a grip surface for easy handling, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The grip surface is applied locally to the closure cap where it is needed for handling, rather than redesigning the entire closure system. The grip surface includes specific features like bulges and textured patterns only in the regions where user contact occurs, maintaining simplicity in other areas of the closure structure.
Solution Approach 2:
The grip surface incorporates curved and rounded features, including bulges and contoured surfaces, that naturally guide finger placement and improve grasping comfort. These curved elements provide ergonomic benefits without requiring complex mechanical mechanisms.
Data Source
AI summary
A closure for a spout of a thin-walled flexible package is provided. The closure has a cap having a cap wall having a cap axis extending between a cap lower end and a cap upper end, a tamper-evident seal, and a grip surface having an undulated grip surface edge having a succession of low sections and high sections, such that bulges and windows are formed on the grip surface. The windows are sufficiently wide circumferentially to contain the cap and the tamper-evident seal in width. The low section of the undulated grip surface edge is tangent inferiorly to an imaginary plane orthogonal to the cap axis, which axially delimits inferiorly at least one of the bulges. The imaginary plane is arranged axially below the cap lower end.