Flip-Top Closure Tamper-Evident Band Segmentation
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Solution Overview
Problem
Existing beverage closures with tamper-evident mechanisms, such as drop bands and tear-off bands, lack clear visual indication of opening and pose litter and choking hazards due to small tab separation.
Innovation Solution
A closure design featuring two initially frangibly connected annular bands that separate upon first opening, with one band retained in the cap and the other dropping onto the base, providing a clear visual tamper-evident indication and incorporating a snap-fitted fixing ring and double hinge mechanism for secure sealing and aseptic filling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tear-off bands are removed from closure body upon first opening, then tamper evidence is provided, but litter problem and choking hazard increase due to small tab separation
Solution Approach 1:
The tamper-evident band is segmented into multiple frangible connection points around its circumference, allowing it to break into controlled segments that remain attached to the closure body rather than becoming loose small tabs. This segmentation provides tamper evidence while preventing litter and choking hazards.
Solution Approach 2:
The tamper-evident band is nested within the closure structure where broken segments remain contained within the closure body or attached to it, rather than being released into the environment. This nesting prevents litter and choking hazards while maintaining tamper evidence functionality.
2Loss of information
If drop bands are released from closure side wall upon first opening, then indication of opening is provided, but clear visual indication on remaining closure is lost due to physical separation
Solution Approach 1:
The tamper-evident band is merged with the closure body through frangible connections that break upon opening, but the broken segments remain physically connected to the closure structure. This merging ensures the indication remains on the closure body itself, providing clear visual evidence that cannot be separated or lost.
Solution Approach 2:
The tamper-evident band is pre-positioned and frangibly connected to the closure body in such a way that breaking it creates an irreversible visual change. The preliminary arrangement ensures that once broken, the band provides permanent visual indication of opening that remains clearly visible on the closure.
3Reliability
If spout and base are fused together for aseptic filling, then preservative-free filling is enabled, but manufacturing complexity increases
Solution Approach 1:
The spout and base are merged into a single integral component, eliminating the need for separate assembly steps and complex sealing mechanisms. This integration enables aseptic filling capability while actually simplifying manufacturing by reducing the number of parts and assembly operations required.
Data Source
AI summary
A flip-top dispensing closure is provided. The closure includes a base and a lid. The base is attachable to a container neck and includes an integral spout. The lid includes a fixing ring and a cap. The fixing ring is attachable to the base and the cap is hingedly attached to the ring. The closure is provided with tamper-evident parts including first and second parts which are initially frangibly connected to each other within the lid, and upon first opening of the cap, the first and second parts are separated, one of the parts being retained by the cap and the other of the parts dropping onto the base.