Threaded Neck Closure With Click Feedback for Glass Packaging
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Solution Overview
Problem
Existing packaging devices for cosmetic products, particularly those made of glass, face challenges in producing high-quality tactile or audible closure indicators due to large radii of curvature limitations, which affect attractiveness and cleanliness, and are difficult to manufacture.
Innovation Solution
A packaging device with a container featuring a threaded neck and a closure member that uses thread interruptions and elastically deformable tongues to provide tactile and/or audible feedback without protrusions, allowing for precise closure indication and easy manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If end-of-travel protuberances are formed on the container neck to provide closure indication, then the user receives tactile or audible feedback, but the container attractiveness is reduced and dirt buildup is promoted
Solution Approach 1:
The invention extracts the closure indication function from the container neck by relocating it to the closure member. The protuberances are removed from the container and replaced with corresponding recesses in the closure member, while the feedback mechanism is transferred to the closure member's tongue elements that engage with thread interruptions on the container neck.
Solution Approach 2:
The invention introduces an intermediary mechanism consisting of tongues on the closure member that engage with thread interruptions on the container. This intermediary system provides the closure indication feedback without requiring direct contact between the user and the container neck protuberances, thereby maintaining container aesthetics while achieving the same functional result.
2Loss of information
If end-of-travel protuberances are formed on the container neck, then closure indication is provided, but manufacturing complexity increases due to small radius of curvature requirements
Solution Approach 1:
The invention extracts the complex protuberance formation from the container manufacturing process and relocates the feedback mechanism to the closure member. This eliminates the need for small radius of curvature features on glass containers, as the thread interruptions and tongue engagement system can be manufactured with standard radii.
Solution Approach 2:
Instead of forming protuberances on the container neck to provide feedback, the invention inverts the approach by creating recesses in the closure member that engage with smooth thread features on the container. This reversal allows glass containers to be manufactured with larger, more feasible radii of curvature.
3Loss of information
If thin flexible walls are used to enable protuberance formation, then closure indication is achieved, but the design becomes difficult to envisage for rigid materials like glass
Solution Approach 1:
The invention extracts the feedback mechanism from the container wall material requirements and relocates it to the closure member. This allows rigid materials like glass to be used for the container while the flexible tongue elements providing feedback are located in the closure member, which can be made of more flexible materials.
Solution Approach 2:
The invention changes the material parameter requirements by separating the feedback function from the container material. The container can maintain its rigid glass construction while the closure member incorporates flexible tongue elements that provide the necessary deformation for feedback, thus adapting the design to work with rigid materials.
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 ensures clear closure perception, maintains attractiveness, reduces dirt buildup, and simplifies production, while being compatible with glass materials.
Implementation Method 1
the closure member having at least one elastically deformable tongue arranged to engage at least partially in the abovementioned thread interruption, during the screwing of the closure member onto the neck of the container, and generate a tactile sensation and/or the emission of an audible click
Data Source
AI summary
A device for packaging a product, in particular a cosmetic product, having a container for containing the product, provided with a threaded neck of longitudinal axis (Z), at least one screw thread having, on the side of the free end of the neck, a thread starting point, and a closure member for closing the container that is arranged to be screwed onto the neck, the closure member having at least one stop arranged to come to bear against the thread starting point at the end of the screwing of the closure member onto the neck of the container to block the rotation of the closure member.