Tamper-Evident Cap Assembly with Asymmetrical Bridges
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Solution Overview
Problem
Existing container cap assemblies lack high bridge integrity and easy visual verification of bridge integrity, leading to potential tampering and contamination risks due to fragile bridge elements that can be resecured or fail during use.
Innovation Solution
A tamper-evident container cap assembly with radially-extending cooperative links and asymmetrical frangible bridge elements that provide structural strength while allowing easy visual confirmation of integrity, preventing destructive deflection and ensuring the tamper-evident ring remains with the container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If small and thin bridge elements are used to allow cap removal, then the cap can be removed from the container, but the bridge elements become difficult to visually inspect for integrity and may be resecured with adhesive
Solution Approach 1:
The bridge elements incorporate asymmetrical features including a thickened portion and a tapered section that create a non-uniform cross-section along the bridge length. This asymmetry provides visual indicators of integrity while maintaining the ability to be removed from the container
Solution Approach 2:
The bridge elements have varying thickness along their length, with specific regions (thickened portions) providing enhanced structural properties and visual inspection capabilities at critical locations while maintaining overall functionality
2Ease of operation
If weak bridge elements are used to enable cap removal, then the cap can be removed from the container, but the bridge elements may break during application causing quality control failures
Solution Approach 1:
The bridge elements incorporate localized thickened portions at critical stress points, providing enhanced strength where needed during application while maintaining the overall frangible design for removal functionality
Solution Approach 2:
The bridge elements feature varying cross-sectional dimensions along their length, with thickened portions and tapered sections that optimize the balance between strength during application and controlled fracture during removal
3Strength
If large bridge elements are used to prevent breakage during application, then the bridge elements withstand opening force, but the tamper-evident ring may be removed with the cap assembly
Solution Approach 1:
The bridge elements have non-uniform cross-sections with thickened portions strategically placed to provide strength where needed while maintaining controlled fracture characteristics, preventing both breakage during application and removal of the tamper-evident ring
Solution Approach 2:
The asymmetrical design of the bridge elements with varying thickness creates optimal stress distribution that ensures the bridges remain intact during application but allow proper separation of the tamper-evident ring during cap removal
4Ease of operation
If radially-spaced fittings are provided on the cap, then the cap can be easily removed from the container, but the cap assembly becomes more complex
Solution Approach 1:
The cap assembly is divided into functional segments including the cap, tamper-evident ring, and bridge elements, with radially-spaced fittings provided only on the cap portion to maintain ease of removal without significantly increasing overall assembly complexity
Data Source
AI summary
A container cap assembly provides a tamper-evident component for detecting cap integrity on a container includes one or more elongate bridges connecting a tamper-evident ring to a cap. The cap assembly also provides radially-extending links on the cap and the tamper-evident ring to help protect the integrity of the bridges as the cap assembly is applied to a container.