Sealing Overcap with Flexing Plug and Vents
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Solution Overview
Problem
Existing overcaps for containers fail to provide a reliable and audible sealing mechanism that reduces pressure and maintains product freshness, especially for moisture or oxygen-sensitive products, as they often rely on friction fits that can be noisy and may not effectively prevent air from escaping.
Innovation Solution
The overcap features a flexing portion with a sealing plug and a downwardly depending wall member that moves between two sealing positions, incorporating vents and flexible sealing surfaces to engage the inner rim, providing a frictional seal and audible indication of engagement while reducing pressure and enhancing product shelf life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a friction fit sealing mechanism is used in existing overcaps, then the sealing function is provided, but the sealing process generates noise and may not effectively prevent air from escaping
Solution Approach 1:
The sealing mechanism is divided into two distinct components: a first sealing surface on the overcap and a second sealing surface on the container. This segmentation allows each surface to be optimized independently for its specific sealing function, improving overall reliability while controlling noise and air escape through dedicated design features for each sealing interface.
Solution Approach 2:
A vent channel is introduced as an intermediary element that provides a controlled pathway for air to escape during the sealing process. This mediator prevents air from being trapped between sealing surfaces (which would cause noise and sealing failure) while directing it through a designated route, thereby eliminating harmful air escape effects.
2Reliability
If a simple overcap design is used, then manufacturing is easier, but it fails to provide reliable sealing and pressure reduction for moisture or oxygen-sensitive products
Solution Approach 1:
The overcap design incorporates nested sealing features where the first sealing surface is integrated into the overcap body, and the second sealing surface is formed on the container's inner rim. This nesting approach allows multiple sealing functions to be achieved within a compact structure, improving reliability without proportionally increasing device complexity.
Solution Approach 2:
The sealing mechanism utilizes vertical dimensionality by positioning sealing surfaces at different heights and depths within the overcap-container assembly. The first sealing surface engages at one vertical level while the vent channel and second sealing surface operate at different vertical positions, enabling reliable sealing and pressure control through three-dimensional spatial arrangement.
3Reliability
If the sealing plug is positioned to engage the inner rim, then a frictional seal is provided, but misalignment can occur during engagement
Solution Approach 1:
The first sealing surface is designed to engage with the container body before the sealing plug engages with the inner rim. This preliminary engagement action guides and aligns the overcap with the container, ensuring proper positioning of the sealing plug relative to the inner rim before the frictional seal is established, thereby preventing misalignment.
Solution Approach 2:
The sealing mechanism incorporates dynamic engagement where the overcap can move vertically during the sealing process. The first sealing surface engages first, allowing the structure to self-align, and then the sealing plug engages with the inner rim in a controlled manner. This dynamic sequence ensures reliable seal engagement while accommodating minor misalignments through controlled movement.
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 a reliable and audible sealing mechanism that reduces pressure inside the container, providing a secure seal and enhancing the shelf life of products by allowing air to escape through vents, while also being easy to use and resistant to misalignment.
Implementation Method 1
The sealing plug includes a peripheral surface dimensioned for frictional sealing engagement with the inner rim
Implementation Method 2
providing a frictional seal and audible indication of engagement while reducing pressure
Implementation Method 3
The flexing portion includes a first sealing position and a second sealing position with respect to the container and includes a downwardly depending wall member
Data Source
AI summary
An overcap is provided for use in sealing a container of the type having an outer rim, an inside wall surface, and an inner rim spaced inwardly from the inside wall surface, with the inner rim forming a container opening. A flexing portion is formed within the body portion of the overcap and is moveable between a first sealing position and a second sealing position. The flexing portion includes a downwardly depending wall member positioned adjacent the inside wall surface of the container in the first sealing position. A sealing plug is provided and is moveable between the first sealing position and the second sealing position. The sealing plug includes a peripheral surface dimension for frictional engagement with the inner rim, releasably closing of the opening in the second sealing position. The sealing plug is separated from the inner rim in the first sealing position.