Threadless Pressure Closure With Relief Valve for Carbonated Containers
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Solution Overview
Problem
Traditional beverage containers with threaded finishes do not meet consumer preferences for a drinking glass-type experience, as they are not aesthetically pleasing and do not provide a threadless closure that can withstand high internal pressures from carbonation, heat, and agitation.
Innovation Solution
A threadless pressure retention closure system comprising a pressure closure assembly with a pressure relief valve and an outer release shell, designed to be coupled with a threadless container finish, allowing for secure sealing and pressure retention while enabling gas venting through a rotating mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a threaded finish is used on the container, then the closure can be securely engaged with the container, but the container does not provide a drinking glass-type appearance and feel
Solution Approach 1:
The invention extracts and removes the threaded portion from the container finish, replacing it with a smooth, barbed engagement structure. The threads are taken out of the visible finish area and replaced with internal barbs that provide secure closure engagement without compromising the drinking glass appearance.
Solution Approach 2:
The invention introduces a barbed structure as an intermediary mechanism between the container finish and the closure. Instead of direct threaded engagement, the barbs act as a mediator that provides secure mechanical interlocking while maintaining a smooth external surface that resembles a drinking glass.
2Shape
If a threadless finish is used on the container, then the container provides a drinking glass-type appearance and feel, but the closure must withstand and retain relatively high internal pressure generated by carbonation, heat, and agitation
Solution Approach 1:
The invention employs a dynamic barbed structure where the barbs are configured to flex and engage with the closure. The barbed structure provides progressive mechanical interlocking that adapts to pressure changes, maintaining secure engagement while withstanding high internal pressures from carbonation, heat, and agitation.
Solution Approach 2:
The closure structure combines multiple materials and structural elements including the barbed finish, sealing components, and pressure-retaining mechanisms. This composite approach integrates smooth aesthetic surfaces with internal structural features that provide robust pressure retention capability.
3Shape
If a threadless closure is designed, then the container provides an aesthetically pleasing appearance, but the closure structure becomes more complex to achieve both sealing and pressure retention
Solution Approach 1:
The closure system is segmented into distinct functional components: the barbed engagement structure for mechanical attachment, the sealing elements for liquid containment, and the pressure retention features. This segmentation allows each component to be optimized for its specific function while maintaining overall aesthetic simplicity.
Data Source
AI summary
A container closure. The closure comprises a pressure closure assembly and an outer release shell configured to be coupled thereto. The assembly comprises a relief valve and an inner shell having a base wall, a pressure relief slot, and an outer skirt extending away from the base wall and including first and second portions. The release shell includes a first portion having a base wall configured to overlap a portion of the inner shell base wall, and a tab corresponding to the slot of the inner shell. The first portion further includes an outer skirt extending away from the first portion base wall and configured to wrap around the first portion of the outer skirt. The release shell further includes a second portion having a base wall configured to overlap a portion of the inner shell base wall, and an outer skirt extending away from the second portion base wall.