Shrink Film Retaining Strap Captive Closure Cap
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Solution Overview
Problem
Existing closure cap systems for containers do not effectively hold the cap captive on the container neck after unscrewing without a guarantee ring, and there is a need to retrofit existing containers with a solution that does not impede the container's use.
Innovation Solution
A container system utilizing a first and second shrink film with a retaining strap, where the first shrink film holds the closure cap captive on the container neck after unscrewing, and the second shrink film serves as an opening indicator, ensuring the cap is held securely without additional features that increase production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guarantee ring is used to hold the closure cap captive on the container neck after unscrewing, then the closure cap is securely held, but the device complexity and production costs increase
Solution Approach 1:
The patent uses a shrink film, which is a flexible thin film material, to replace the rigid guarantee ring structure. The shrink film is applied to the container neck and shrinks to form a retaining strap that holds the closure cap captive, achieving the same function with a simpler, more flexible structure that reduces device complexity and production costs.
Solution Approach 2:
The patent utilizes the parameter change of the shrink film material through thermal shrinking. The film is applied in a relaxed state and then shrunk using heat, changing its dimensional parameters to form a tight-fitting retaining strap that securely holds the closure cap without requiring additional structural features.
2Reliability
If additional features are added to the container to enable captive closure cap holding, then the closure cap is held securely, but the production costs increase
Solution Approach 1:
The shrink film serves multiple functions: it acts as a retaining strap to hold the closure cap captive, provides an opening indicator through perforations that tear when the cap is removed, and can serve as labeling material. This multi-functionality eliminates the need for separate guarantee rings and opening indicators, reducing production costs while maintaining the captive holding function.
Solution Approach 2:
The patent combines the functions of the guarantee ring, opening indicator, and labeling material into a single shrink film component. By merging these previously separate features into one integrated solution, the patent reduces the number of parts, simplifies manufacturing, and lowers production costs while achieving the same technical效果.
3Reliability
If a shrink film with retaining strap is used to hold the closure cap captive, then the closure cap is held securely without additional container features, but the shrink film structure must be precisely designed
Solution Approach 1:
The shrink film is pre-designed with integrated features including the retaining strap configuration and perforation patterns for opening indication. These features are prepared in advance during film manufacturing, allowing for precise control of the holding function without requiring complex adjustments during container assembly or use.
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 solution allows for a cost-effective retrofitting of existing containers with a captive closure cap system that maintains the cap's position without obstructing the container's use, while also serving as an opening indicator to ensure the container is sold unopened.
Implementation Method 1
a shrink film is to be understood as meaning a plastic film which shrinks under the action of heat and assumes the shape of the container body and the closure cap onto which it is shrunk
Data Source
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AI summary
The invention relates to a container (11), comprising: a container body (13); a container neck (15), which adjoins the container body; an external thread (25), which is formed on the container neck (15); and a closure cap (17) for closing a pouring opening (27), which is provided within the container neck (15). A first region (33) of a first shrink film (29), which shrink film is in the shape of a tube, is shrunk onto the closure cap (17), and a second region (35) of the first shrink film is shrunk at least onto a container neck region (37). The container neck region (37) adjoins the open edge (39) of the closure cap (17) screwed onto the container neck (15), and thus the first shrink film (29) is held on the container neck (15) and on the closure cap (17). The first region (33) and the second region (35) of the first shrink film (29, 31) are connected by means of a retaining strip (47).