Double Tamper Evidence Cap for Container Bottles
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Solution Overview
Problem
Current tamper-proof bottle caps can be easily compromised by counterfeiters using mechanical or thermal methods to remove the cap without breaking the Tamper Evidence Band (TEB), allowing fake products to be inserted without detection.
Innovation Solution
A screw cap design featuring a Tamper Evidence Band (TEB) with dual-level frangible bridges and additional markers that indicate first opening and any prior illicit openings, preventing removal without breaking the TEB, and ensuring visible signs of tampering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-level TEB with break line is used, then the cap can indicate first opening, but it can be easily compromised by counterfeiters using mechanical or thermal methods to remove the cap without breaking the TEB
Solution Approach 1:
The TEB is segmented into two distinct levels: an upper level with frangible connection bridges that break during legitimate opening, and a lower level with additional markers positioned closer to the bottle neck. This segmentation creates multiple independent tamper evidence mechanisms, making it significantly harder for counterfeiters to compromise the system while maintaining visual clarity for consumers.
Solution Approach 2:
The invention adds a vertical dimension to the tamper evidence system by positioning markers at two different heights on the TEB. The upper markers indicate first opening, while the lower markers detect illicit removal attempts. This multi-level vertical arrangement transforms a single-plane indication system into a three-dimensional tamper detection mechanism, enhancing reliability without overwhelming complexity.
2Reliability
If additional lower markers are added to the TEB, then illicit opening detection is improved, but the manufacturing complexity increases
Solution Approach 1:
The dual-level TEB is integrated into a single molded cap structure, combining the upper and lower marker systems into one unified component. This merging approach allows both tamper evidence functions to be manufactured simultaneously in a single injection molding process, avoiding the need for separate assembly steps and maintaining manufacturing efficiency despite the enhanced detection capabilities.
Solution Approach 2:
The invention utilizes variations in the physical parameters of the TEB structure, specifically the vertical positioning and geometric configuration of the frangible bridges and markers. By carefully controlling these geometric parameters during molding, the system achieves enhanced illicit opening detection while maintaining compatibility with standard manufacturing processes and material properties.
3Ease of operation
If the frangible bridges are made strong, then the cap can be removed without breaking, but the tamper evidence function is compromised
Solution Approach 1:
The frangible connection bridges are pre-designed with controlled weakness at specific stress points, creating a predetermined failure mechanism. During legitimate cap removal, the applied force naturally concentrates on these pre-weakened sections, causing them to break cleanly and indicate opening. This preliminary structuring ensures both easy removal for consumers and reliable tamper evidence, as the bridges are engineered to fail at the exact moment of intended opening.
Data Source
Figure 1
Figure 2~2A
Figure 2B
AI summary
The invention pertains to an improved container (e.g bottle) cap which is a single use leakproof closing, which shows obvious indications of an illicit opening and re-use, having a double level of tamperproof means. This cap is a screw cap (1) for a neck (2) of a bottle (3) comprising an upper part (4) removable from the neck (2) and a lower part (5) non-removable from the neck (2). Said lower non-removable part (5) is a tamper evidence band (TEB) linked to the bottom edge (12) of the cap's skirt (11) by annularly regularly distributed frangible connection bridges (13) which are designed to be broken at the first opening of the bottle by unscrewing and removal of the upper part (4) of the cap (1). Said TEB also displays any breaking in of the cap (1) before the first container (3) opening, thanks to additional lower markers (18).