Tamper-Evident Closure with Hinged Indicator
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Solution Overview
Problem
Conventional tamper seals for two-piece closures, such as those used in sport drink containers, lack clear visual confirmation of an opened or tampered-with status, making it difficult to determine if the container has been previously opened.
Innovation Solution
A closure design featuring a tamper element interconnected via a predetermined breaking linkage and hinge arrangement, allowing the tamper element to bend away from the cover and snap into a stable position after the linkage is broken, providing clear visual evidence of opening, with additional folding means and rib structures to secure the element in the folded state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If breakable elements are used as a tamper seal between the base portion and the top portion, then the tamper seal provides a visual indication of opening, but the visual confirmation of a broken seal is not easy to detect
Solution Approach 1:
The tamper element utilizes color changes to indicate the opened status. When the predetermined breaking linkage is broken, the tamper element changes its visual appearance (color or position) to provide clear visual evidence that the container has been opened, making it easy for users to detect the opened state without confusion.
Solution Approach 2:
The tamper element is designed to be movable rather than fixed. It can move between different positions (e.g., vertical and horizontal orientations) based on the structural state of the breaking linkage. This dynamic behavior provides clear visual feedback about whether the seal is intact or broken, resolving the detection difficulty.
2Reliability
If a tamper element is added to provide visual indication of opening, then the tamper seal effectiveness is improved, but the device complexity increases
Solution Approach 1:
The tamper element is merged with the cover component of the closure. The tamper element is formed as an integral part of the cover structure, sharing the same material and manufacturing process. This merging approach provides reliable tamper indication while minimizing the increase in device complexity by avoiding separate, independent components.
Solution Approach 2:
The tamper element serves multiple functions: it acts as both a structural component of the cover and a visual indicator of opening status. The same element that provides structural integrity to the cover also changes appearance when the breaking linkage is broken, eliminating the need for separate indicator components and reducing overall device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The closure provides a clear visual indication of initial opening or tampering, ensuring user awareness of container status without hindering usage or re-closure.
Implementation Method 1
The tamper element is interconnected to the annular base by a hinge arrangement, such that the tamper element can be bent away from the outer wall after tearing the predetermined breaking linkage
Implementation Method 2
The hinge arrangement is arranged between the annular base and the predetermined breaking linkage, such that the tamper element can be bent away from the outer wall after tearing the predetermined breaking linkage
Implementation Method 3
The tamper element is interconnected to the outer wall by at least one predetermined breaking linkage
Data Source
Figure 1~2
Figure 3~5
Figure 6~10
AI summary
A closure ( 1 ) for a liquid container according to the invention comprises a base portion (2) and a top portion (8). The base portion (2) comprises a top deck (3) and an outer skirt (5) extending from an outer end (6) of the top deck (3) in a lower direction away from the top deck (3). The outer skirt (5) comprises a fastening means (7) to interconnect the closure (1) to the container neck. The top deck (3) further has a spout (4) extending in an upper direction away from the top deck (3). The top portion (8) comprises an annular base (9) interconnectable to the base portion (2) and a cover (1 0) having an outer wall (11). At least one tamper element (13) extends from the annular base (9) in the upper direction above the annular base (9) along the outer wall (11) but spaced a distance apart from said outer wall (11). The tamper element (13) is also initially interconnected to the outer wall (11) by a predetermined breaking linkage (14).