Easy Opening Container With Removable Friction Strip
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Solution Overview
Problem
Existing containers with twist-off type closures require significant opening force, especially for elderly users and those with large diameters, due to high frictional forces between the lid and neck.
Innovation Solution
Incorporating a removable element, such as a strip or film, between the screw thread and lug of the container's neck and lid, which reduces the distance between the lug and sealing edge, thereby decreasing frictional force and making it easier to open the container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a twist-off type closure with multiple screw threads is used, then the closing lid provides secure closure, but the opening force required becomes too high for elderly users and large diameter containers
Solution Approach 1:
A removable opening aid element is introduced as an intermediary component between the lug and screw thread. This element features a Lug Reception Area that accommodates the lug and a Screw Thread Engagement Area with reduced friction characteristics, allowing easier rotation during opening while maintaining secure closure when present
Solution Approach 2:
The friction parameter between the opening aid element and screw thread is deliberately reduced compared to the direct Lug-screw thread interface. The opening aid element is designed with surface characteristics or material properties that lower the coefficient of friction, reducing the torque required for opening
2Reliability
If the distance between the lug and sealing edge is large, then the closing lid can be securely positioned, but the frictional force increases making opening difficult
Solution Approach 1:
The opening aid element serves as a mediator that changes the interaction mechanism between the lug and screw thread. By providing a dedicated engagement interface with reduced friction properties, it allows the lug to engage the screw thread more easily during opening while maintaining proper lid positioning when closed
Solution Approach 2:
The opening aid element is pre-positioned on the screw thread before opening occurs. This preliminary placement ensures that when opening force is applied, the lug immediately engages with the pre-positioned opening aid element rather than directly with the screw thread, reducing the initial friction barrier
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 reduces the opening force required, making it easier to open containers by decreasing the frictional force between the lid and neck, particularly benefiting elderly users and those with larger containers.
Implementation Method 1
the frictional force existing between the closing lid and the neck decreases
Data Source
Figure 1
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AI summary
Easy opening container comprising a body (10) with an opening (11), and a lid (20) for the opening (11), the opening (11) comprising a neck (12) comprising at least one screw thread (13) and a sealing edge (14), and the closing lid (20) comprising an upper part (21) and a peripheral skirt (22), the skirt (22) comprising a free edge (23), the free edge (23) including a plurality of inwardly extending lugs (24), said lugs (24) being configured for being coupled with the screw thread (13) when the lid (20) is closed on the opening (11). The container (100) further comprises at least one element for easy opening, preferably a strip (30), between the screw thread (13) and the lugs (24), said element being configured for being removed before opening the lid (20) in order to make the opening easier.