Tamper-Evident Bottle Cap With Frangible Strip And Color Indicator
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Solution Overview
Problem
Existing containers lack effective tamper-evident features, making it difficult for end users to determine if the container has been tampered with, which can lead to the inclusion of counterfeit or harmful products.
Innovation Solution
The development of a container with two tamper-evident features: a first frangible strip that must be torn and pulled out to open the cap, revealing a second colored strip indicating potential tampering, and a chamfered edge design with a textured facet for improved grip and a pouring mechanism with spill-proof inner flaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If simple caps are used to close containers, then manufacturing cost is reduced and ease of manufacture is improved, but tamper evidence capability deteriorates and reliability worsens
Solution Approach 1:
The cap is divided into multiple functional segments: an outer cap body, an inner tamper-evident strip, a colored indicator layer, and a sealing mechanism. Each segment performs a specific function - the outer cap provides structural support and threading, while the inner strip with colored layer provides tamper evidence. This segmentation allows the complex tamper-evident functionality to be achieved while maintaining relatively simple manufacturing of individual components.
Solution Approach 2:
The tamper-evident strip with colored layer is nested within the cap structure, specifically positioned between the cap body and the container opening. The inner strip is inserted into a recess or groove in the cap, creating a nested configuration where the tamper-evident features are integrated within the cap assembly rather than being separate attachments.
2Ease of operation
If re-usable caps are used, then ease of operation is improved for normal use, but tamper evidence capability deteriorates as third parties can remove and reseal without detection
Solution Approach 1:
The tamper-evident strip is pre-configured in a sealed state within the cap assembly before the container is sealed. The colored layer is initially hidden or covered, and the strip is positioned to bridge the gap between the cap and container opening. When tampering occurs, the strip is pulled outward, automatically revealing the colored layer as a warning indicator, thus providing preliminary protection against undetected tampering.
Solution Approach 2:
The tamper-evident strip incorporates a colored layer that changes visibility based on the tampering state. When the strip is intact and sealed, the colored layer is hidden or covered. Upon tampering, the strip is pulled outward, revealing the colored layer that visually indicates the container has been compromised. This color visibility change provides an intuitive and reliable tamper indicator.
3Reliability
If frangible strips are added as tamper evident features, then tamper evidence capability is improved, but device complexity increases and manufacturing becomes more complex
Solution Approach 1:
The tamper-evident strip, colored indicator layer, and sealing function are merged into a single integrated component assembly. The strip is formed as one piece with the colored layer applied directly to it, and it simultaneously performs both sealing and indication functions. This merging reduces the number of separate parts that would need to be assembled and managed, thereby reducing overall device complexity despite adding tamper-evident functionality.
Solution Approach 2:
The frangible strip serves multiple functions simultaneously: it acts as a seal to close the container opening, provides tamper evidence through its frangible nature, and includes a colored layer that visually indicates tampering status. This multi-functionality eliminates the need for separate sealing mechanisms and tamper indicators, reducing the overall complexity of the cap assembly by consolidating multiple functions into a single component.
4Reliability
If the cap includes multiple tamper evident features, then tamper evidence capability and reliability are improved, but ease of operation deteriorates due to additional steps required
Solution Approach 1:
The cap assembly transitions from a static sealed state to a dynamic tamper-evident state through the frangible strip's designed failure mode. The strip is engineered to break or pull away along a predetermined fracture line when subjected to tampering forces, dynamically revealing the colored indicator layer. This dynamic response provides reliable tamper evidence while requiring minimal user action - simply pulling or twisting the cap activates the indicator mechanism.
Data Source
AI summary
A container (10) having tamper evident features comprising: a bottle (12) having a neck (34) with an opening (14) at a distal end (16) and a base (20) at a proximal end (18) thereof; a cap (22) received on the neck (34) and movably retained on the bottle (12) wherein the cap (22) includes a first tamper evident feature (24) to provide an indication of tampering to an end user, the cap (22) further includes a second tamper evident feature (32) which becomes visible only when the first tamper evident feature (24) removed partially or completely from the bottle (12).