Composite Closure Bead Segments Anti-Backoff
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Solution Overview
Problem
Existing composite closures lack a reliable mechanism to ensure proper sealing and prevent backoff after processing, as they often rely on deformable surfaces that lose effectiveness over time or under varying conditions.
Innovation Solution
A composite closure design featuring a circular plastic shell with inwardly extending circumferential bead segments that provide a controlled radial force, ensuring a perceptible resistance upon rotation and preventing movement of the fitment with respect to the end panel and container, thereby ensuring proper sealing and anti-backoff features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If deformable surfaces are used to provide sealing force, then initial sealing effectiveness is improved, but reliability deteriorates over time or under varying conditions
Solution Approach 1:
The patent changes the physical state of the bead from deformable to non-deformable, transforming it from a flexible sealing element to a rigid structural component that maintains constant geometric dimensions and provides stable, predictable sealing force over time
Solution Approach 2:
The patent replaces the short-living deformable surface with a durable non-deformable bead structure that maintains its sealing effectiveness throughout the entire service life of the closure, eliminating the need for replacement or adjustment
2Reliability
If no radial force mechanism is provided, then ease of opening is improved, but sealing assurance deteriorates
Solution Approach 1:
The patent applies local quality by creating a specific non-deformable bead structure at the critical sealing interface between the closure and container, while the rest of the closure remains deformable or flexible, providing localized sealing force exactly where needed
Solution Approach 2:
The non-deformable bead is pre-configured in the closure structure to automatically apply radial sealing force as soon as the closure is applied to the container, ensuring sealing assurance is established before any opening operation occurs
3Reliability
If anti-backoff features are added to prevent movement, then reliability is improved, but device complexity increases
Solution Approach 1:
The non-deformable bead performs multiple functions simultaneously: it provides the primary sealing force, prevents backoff movement, and maintains positioning accuracy, eliminating the need for separate anti-backoff mechanisms and reducing overall device complexity
Solution Approach 2:
The patent merges the sealing function and anti-backoff function into a single non-deformable bead structure, combining what would traditionally require separate components into one integrated element
Data Source
AI summary
A composite closure which includes an end panel that is received in a circular plastic fitment having a central opening therein defined by an inwardly extending flange which overlies an outer periphery of the end panel and an integral skirt downwardly depending from the flange. The fitment includes a radially inwardly extending circumferential bead or bead segments which include a substantially non-deformable flat vertical surfaces that are substantially parallel to the axis of the closure and axially positioned to contact the radial outermost edge of the end panel when the closure is fully applied to a container. The bead or bead segments are configured to impart a predetermined radial force on the end panel which produces a perceptible resistance upon initial rotation of the fully applied closure and provides assurance to a person removing the closure from the container that it has been fully applied to the container.