Container Lid Tethering for Pressure-Secure Reclosure
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Solution Overview
Problem
Existing container designs face challenges in effectively sealing gas pressure within the internal cavity due to disproportionate ratios of neck and side wall diameters, leading to difficulties in maintaining a seal against atmospheric pressure, especially when using materials like PET resin.
Innovation Solution
A container design featuring a container body and lid with specific thread configurations and sealing mechanisms, including internal and external threads, a security band, and a tether, that allow for secure attachment and detachment, enhancing the sealing capabilities despite the disproportionate diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the neck diameter to side wall diameter ratio is increased to allow easier opening, then the ease of operation is improved, but the sealing capability against atmospheric pressure deteriorates
Solution Approach 1:
The container is divided into distinct functional zones: a larger-diameter neck region for easy opening operations, and a side wall region with sufficient diameter for maintaining seal integrity. This segmentation allows each region to optimize its diameter independently, resolving the contradiction between ease of opening and sealing capability.
Solution Approach 2:
Different diameter characteristics are applied to different parts of the container. The neck has a larger diameter relative to the side wall to facilitate opening, while the side wall maintains appropriate dimensions for sealing. This local differentiation of geometric properties allows simultaneous optimization of both opening ease and seal reliability.
2Ease of operation
If the container uses detachable lid with security band and tether, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
Multiple functional elements (lid, security band, tether, threading mechanism) are merged into a single integrated assembly that operates as one unit during attachment and detachment. This combining of components simplifies the user interaction despite the presence of multiple individual parts, as they work together through a unified mechanical action.
Solution Approach 2:
The detachable lid assembly with security band and tether serves multiple functions simultaneously: it provides the sealing closure, implements the security feature to prevent unauthorized opening, and enables easy attachment/detachment operations. This multi-functionality justifies the additional structural elements by consolidating several features into one integrated mechanism.
Data Source
AI summary
Apparatus and method(s) according to which a first container lid is sealingly engaged against a container body. Once so sealingly engaged, a first portion of the first container lid is detachable from, and re-attachable to, the container body. A security band remains attached to a neck of the container body when the first portion of the container lid is detached from the container body. In one or more embodiments, when detached from the container body, the first portion of the container lid remains connected to the security band via a tether. The tether is formed substantially within security band. The container body is adapted to be stacked onto a second container lid so that a first three-dimensional profile of the second container lid matingly receives a second three-dimensional profile of the container body. In one or more embodiments, the second container lid is identical to the first container lid.