Reclosable Bag Zipper With Segmented Profiles For Audible Closure
Solution Overview
Problem
Existing zipper mechanisms for reclosable bags often fail to produce a clear audible sound when closed, making it uncertain for users whether the bag is properly sealed.
Innovation Solution
A zipper design featuring elongated groove and rib profiles with alternating segments of different lengths and cross-sections, creating structural discontinuities that produce a louder and deeper audible clicking sound upon closure, ensuring user confirmation of the seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional zipper mechanisms are used, then the bag can be sealed, but the closing sound is not audible or clear enough for users to verify proper closure
Solution Approach 1:
The zipper profile is divided into alternating first and second segments along its length. The first segments have a first cross-sectional shape while the second segments have a second cross-sectional shape that is different from the first. This segmentation creates structural discontinuities that generate audible clicking sounds during closure, allowing users to verify proper sealing.
Solution Approach 2:
Different portions of the zipper profile are given different local properties. Specifically, the first segments and second segments have different cross-sectional shapes, creating localized variations in stiffness and geometry. These local quality differences cause the zipper to produce distinct audible signals at specific locations during closure, enhancing user feedback without affecting overall sealing function.
2Reliability
If the zipper produces a louder sound, then user confirmation is improved, but the structural complexity of the zipper increases
Solution Approach 1:
The zipper profile is segmented into alternating first and second segments with different cross-sectional shapes. This segmentation approach achieves the dual goal of producing audible closure signals while maintaining a relatively simple overall structure that can be manufactured using conventional extrusion processes.
Solution Approach 2:
The cross-sectional shape parameter of the zipper profile is varied periodically along its length, creating alternating segments with different geometries. This parameter change approach generates audible closure feedback without requiring additional components or complex mechanisms, as the structural variation is integrated into the zipper profile itself.
Data Source
AI summary
A closure mechanism for a reclosable bag including an elongated groove profile having two arms which define an opening to a channel, and an elongated rib profile opposing the groove profile, wherein a plurality of first segments of the rib profile alternate with a plurality of second segments of the rib profile to create a structural discontinuity along a length thereof. The groove profile and the rib profile form a first zipper, the second segments have a smaller cross-section when viewed perpendicular to the length of the rib profile than the first segments, and the second segments are longer than the first segments.