Tamperproof Seal With Interlocking Teeth And Kiss-Cut
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Solution Overview
Problem
Existing tamperproof seals for capped containers lack a simple, cost-effective design that provides clear evidence of tampering and prevents easy replacement of the seal after it has been compromised.
Innovation Solution
A cap assembly with a tamperproof seal that consists of a cap with a top and bottom portion, featuring interlocking teeth and a kiss cut seal that can only be broken by twisting in a specific direction, ensuring that once broken, the seal cannot be reattached, thus indicating tampering and preventing unauthorized resealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heat shrink bands and labels are used to externally seal containers, then sealing is achieved, but the seals can be easily replaced and manipulated to hide tampering evidence
Solution Approach 1:
The cap is divided into two portions (first cap portion and second cap portion) that are separated by a kiss-cut seal. This segmentation allows the seal to be broken in a specific way that prevents easy replacement, as the two portions cannot be reattached without compromising the seal integrity.
Solution Approach 2:
The interlocking teeth are designed with asymmetric geometries that allow the cap portions to be joined only in a specific orientation. The teeth on the first cap portion and second cap portion are shaped to interlock in one direction but cannot be reconnected after the seal is broken, preventing tampering evidence from being hidden.
2Reliability
If tear-off lids breaking open skirts are used, then tampering evidence is provided, but the manufacturing complexity and cost increase
Solution Approach 1:
The cap is pre-formed with two separated portions and pre-formed teeth during the molding process. The kiss-cut seal is created in advance during manufacturing, so that when the product reaches the user, the tamperproof mechanism is already in place and requires no additional assembly or complex manufacturing steps at the point of use.
Solution Approach 2:
The seal is designed with specific physical parameters including the geometry of interlocking teeth, the depth of the kiss-cut, and the material properties that allow controlled breaking. These parameters are optimized during manufacturing to ensure the seal breaks in a specific way that provides tampering evidence while keeping the manufacturing process simple and cost-effective.
3Reliability
If existing tamperproof seals are used, then sealing is provided, but clear tampering indication and prevention of seal replacement are not simultaneously achieved
Solution Approach 1:
The interlocking teeth act as an intermediary mechanism between the first cap portion and second cap portion. When the seal is intact, the teeth are engaged and prevent separation. When the seal is broken, the teeth remain engaged but cannot be reconnected, providing clear tampering indication while maintaining the sealed state until proper opening.
Solution Approach 2:
Instead of designing a seal that is easy to replace after tampering, the invention inverts the approach by creating a seal that is intentionally difficult to replace. The kiss-cut separation combined with interlocking teeth ensures that once the seal is broken, the cap portions cannot be reattached, making tampering evidence permanent and clear.
Data Source
AI summary
A system for a tamperproof seal having a cap assembly and a bottle assembly is disclosed. The bottle assembly includes a bottle with a neck and bottle threads. The cap assembly includes a cap with a top portion and a bottom portion which engage the neck of the bottle. Between the top and bottom portion there is a seal created. The seal is initially intact and only broken once the top and bottom portion are separated. The seal cannot be replaced once it has been broken. If the seal is broken reaching the intended party, then tampering occurred. The top portion may be removably mounted to the bottle. The top portion includes inner threads that engage the bottle threads. The bottom portion includes inner teeth angled towards each other which engage the bottommost of bottle threads. Inner teeth prevent the replacing of the cap once the seal is broken.