Tamper-Evident Closure Cap with Frangible Flange
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Solution Overview
Problem
Existing methods for applying overseals or closure caps to shipping containers are labor-intensive and inefficient, and tamper-indicating features often fail to prevent unauthorized access due to damage during handling, conflicting with the need for robustness and ease of removal.
Innovation Solution
A preassembled kit comprising a support ring with a masking membrane or frangible projection, a closure plug, and an optional outer cover with tamper-evidencing features, allowing for rapid snap-fitting onto the container neck, providing tamper indication and protection without the need for specialized tools or slow foil application processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional crimping tools are used to apply overseals, then the seal can be securely attached, but the application process becomes labor-intensive and inefficient
Solution Approach 1:
The closure cap is divided into distinct functional segments: an attachment portion with engagement features for secure attachment, a body portion for structural integrity, and a tamper-indicating portion with frangible elements. This segmentation allows each part to be optimized independently while enabling rapid assembly without complex crimping tools.
Solution Approach 2:
The closure cap is pre-assembled with all necessary components (attachment features, tamper-indicating elements, and sealing components) integrated into a single unit before application. This preliminary assembly eliminates the need for multi-step field assembly and specialized application tools, significantly improving application efficiency.
2Strength
If the cap construction is made more robust to prevent damage during handling, then tamper-indicating features are better protected, but the cap becomes harder to remove in authorized situations
Solution Approach 1:
Different regions of the closure cap have different mechanical properties optimized for their specific functions: the attachment portion and body are made robust for protection and secure attachment, while the tamper-indicating portion incorporates frangible elements designed to break under specific removal forces. This local differentiation allows the cap to be both protective and removable when authorized.
Solution Approach 2:
The closure cap incorporates dynamic characteristics through its frangible tamper-indicating elements that are designed to break at specific stress thresholds. During normal handling, the robust construction protects these elements, but during authorized removal with proper tools, the frangible elements fail in a controlled manner, enabling removal while maintaining security.
3Reliability
If sharp cutting or puncturing implements are used to remove the cap, then the cap can be removed to prevent reuse, but there is a high likelihood of injury or accidental damage to the underlying closure
Solution Approach 1:
The closure cap incorporates self-service removal features through its frangible tamper-indicating elements and integrated attachment mechanisms. These elements are designed to fail or disengage in a controlled manner during authorized removal, eliminating the need for external cutting or puncturing tools and thereby preventing injury and damage to the underlying closure.
Solution Approach 2:
The frangible tamper-indicating elements serve as an intermediary mechanism between the secure attachment function and the removal function. These elements are designed to break in a controlled way during authorized removal, mediating between the need for secure attachment and the need for safe, tool-free removal without sharp implements.
4Reliability
If foil application is performed on the filling line after container filling, then tamper indication is provided, but the process becomes slow and unsuited to automated filling lines
Solution Approach 1:
The tamper-indicating features are pre-integrated into the closure cap during manufacturing, with frangible elements and masking membranes assembled as part of the cap structure before application. This preliminary integration eliminates the need for separate foil application steps on the filling line, maintaining high production speeds while providing reliable tamper indication.
Solution Approach 2:
The closure cap merges multiple functions into a single integrated component: sealing, tamper indication, and attachment. The frangible elements and masking membranes are combined with the cap structure itself, eliminating the need for separate foil application processes and enabling the closure to be applied rapidly on automated filling lines while providing comprehensive tamper protection.
Data Source
AI summary
A tamper indicating preassembly or kit of parts is provided for protection of a container closure plug receivable in a container opening having a groove or recess formed thereabout. A support ring comprises a radially inwardly directed lip engageable in the groove or recess. A masking membrane may be sealed at its periphery to the support ring. The support ring may further comprise a frangibly attached, inwardly extending, flange or projection. When the plug is received in the container opening and the support ring lip is received in the container opening groove or recess, the masking membrane covers up an upper end of the plug and/or the inwardly extending flange or projection overlaps the upper end of the plug. A protective outer cover may also be provided.