Pivoting Closure with Frangible Bridges for Tamper Evidence
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Solution Overview
Problem
Current container closures lack a mechanism to indicate tamper evidence while allowing easy access to the contents and resealing without additional components or complex mechanisms.
Innovation Solution
A closure design featuring a main body and tamper band connected by frangible bridges, with a hinge that allows the main body to pivot relative to the tamper band, enabling access and resealing without separate components, and incorporating a flexible interior ring and locking structure for secure engagement with the container finish.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional closure with tamper band and bridges is used, then tamper evidence is provided, but the closure cannot be easily opened and resealed without additional components
Solution Approach 1:
The closure is divided into two functional segments: a tamper band that remains on the container to provide tamper evidence, and a main body that can be removed and resealed. The frangible bridges connect these segments initially, but allow separation when torque is applied, enabling the main body to be reused while the tamper band stays on the container.
Solution Approach 2:
The closure transitions from a static sealed state to a dynamic state where the main body can pivot and rotate independently from the tamper band. The hinge and frangible bridges create a mechanical system that allows controlled movement and separation, enabling the closure to adapt between sealed, opened, and resealed configurations.
2Ease of operation
If the closure is designed to allow easy opening, then access to contents is improved, but tamper evidence indication is lost
Solution Approach 1:
The tamper evidence function is extracted from the main closure body and assigned to the tamper band that remains on the container. When the closure is opened, the main body is removed but the tamper band with its visual indicators (broken bridges, separation from main body) remains on the container, providing continuous tamper evidence regardless of whether the main body is reused.
3Ease of operation
If additional components are added to enable resealing, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The hinge and frangible bridges are integrated directly into the closure structure during molding, rather than being separate components. The hinge is formed as part of the tamper band assembly, and the bridges are created through scoring or molding processes, eliminating the need for additional fasteners, clips, or mechanical attachment devices.
Solution Approach 2:
The main closure body serves multiple functions: it provides the sealing interface when closed, acts as a removable cover for access, and can be resealed by rotating back onto the tamper band. The same structural elements (hinge, bridges) that enable tamper evidence also facilitate the opening and resealing operations.
Data Source
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AI summary
A closure for closing an opening defined by a finish of a container. The closure includes a main body and a tamper band. The tamper band is connected to the main body by a plurality of bridges. A hinge of the closure is configured to permit the main body to pivot relative to the tamper band.