Integrated Cap Assembly for High-Torque Hermetic Sealing
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Solution Overview
Problem
Current cap assemblies for plastic or glass vessels face issues with inadequate seal integrity, high torque requirements leading to leakage, threading misalignment, and operator errors, especially when under pressure.
Innovation Solution
A cap design featuring a single molded piece comprising a stopper component and a cap component, made from polymers like fluoropolymers or thermoplastics, with a tubular portion and radial flange for secure engagement, and a locking mechanism to withstand high torques and ensure a hermetic seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current cap assembly designs are used, then the structure is simple, but seal integrity is inadequate and leakage occurs under pressure
Solution Approach 1:
The patent combines the stopper component and cap component into a single integrated cap assembly. The stopper with sealing elements is merged with the cap body and threading mechanism, creating a unified structure that ensures proper sealing engagement while maintaining structural simplicity. This integration eliminates the need for separate sealing components and reduces assembly complexity.
2Reliability
If high applied torques are used to provide proper sealing, then seal integrity improves, but threading jumping and misalignment occur
Solution Approach 1:
The cap assembly design incorporates pre-configured threading geometry and alignment features that guide the cap onto the vessel opening before torque is applied. The threading is designed to self-align during initial engagement, ensuring proper orientation before high torque is required for sealing. This preliminary alignment prevents threading jumping and misalignment during the tightening process.
3Productivity
If rapid torqueing is applied, then assembly speed increases, but threading failures and misalignment occur
Solution Approach 1:
The cap assembly incorporates guiding features and threading geometry that enable rapid engagement without sacrificing reliability. The threading is designed to self-align during quick attachment, allowing high-speed assembly while preventing misalignment and threading failures that typically occur during rapid torqueing of conventional designs.
4Ease of operation
If the cap assembly is tilted during assembly, then ease of positioning improves, but uneven pressure application and seal failures occur
Solution Approach 1:
The cap assembly incorporates asymmetric alignment features including a keyed interface between the cap and vessel opening. This asymmetric design allows the cap to be easily positioned at various angles during approach, but automatically constrains it to the correct orientation upon engagement, preventing tilted assembly and ensuring uniform pressure distribution across the sealing surface.
Data Source
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AI summary
The present application is directed to cap assemblies and particularly, cap assembly for closing an opening in a vessel, the cap assembly including a stopper including an polymer body adapted to fit an opening of a vessel, the stopper also including a tubular portion which defines an internal passageway extending through the polymer body; and a rigid cap attached to and integral with the stopper, wherein the cap is adapted to engage the vessel and provide a sealing force between the stopper and the vessel.