Metallic Container Neck With Internal Threads for Resealable Sealing
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Solution Overview
Problem
Current metallic beverage containers with external threads are expensive to produce, prone to leakage, and have limited pressure resistance, leading to waste and environmental concerns due to the inability to reclose, which affects consumer satisfaction and product preservation.
Innovation Solution
A metallic container with inwardly facing threads and a threaded closure that can be removably interconnected, allowing for resealing and featuring a method of forming threads by compressing the neck portion against the closure using a tool or mandrel, with optional features like a tamper indicator and gas permeation barrier to enhance sealing and pressure resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If external threads are used on the bottle neck, then the container can be sealed with a threaded closure, but the manufacturing cost increases and the container becomes prone to leakage
Solution Approach 1:
The patent inverts the conventional threading arrangement by moving the threads from the external bottle neck surface to the internal surface. This allows the closure to screw onto the bottle from the inside, eliminating the need for external threads while maintaining resealability. The inversion resolves the contradiction by achieving the sealing function without the manufacturing complexity and leakage issues associated with external threading.
Solution Approach 2:
The closure body is inserted into the bottle neck bore, with the closure threads engaging the internal bottle threads from within. This nested arrangement allows the closure to be housed inside the neck opening, eliminating external thread protrusions that cause leakage and manufacturing difficulties, while still providing secure threaded engagement for resealability.
2Reliability
If external threads are used on the bottle neck, then the container can be sealed, but the container leaks and has low pressure resistance
Solution Approach 1:
By inverting the thread location to the internal surface and having the closure insert into the bottle neck, the sealing interface is positioned inside the pressure-containing volume. This allows the seal to better withstand internal pressure without the structural weaknesses associated with external threading, thereby improving both sealing performance and pressure resistance simultaneously.
Solution Approach 2:
The closure body includes a bottom portion that engages with the bottle neck structure to provide preemptive support against pressure-induced blowout. The internal threading and closure positioning are designed to distribute and cushion the internal pressure forces before they can cause leakage or failure, enhancing both sealing reliability and pressure resistance.
3Loss of substance
If a threaded closure is added to allow reclosure, then waste is reduced, but the device complexity increases
Solution Approach 1:
The closure body serves multiple functions: it provides the threaded sealing interface, contains the gas permeation barrier, supports the tamper indicator mechanism, and enables reclosure capability. By consolidating these functions into a single multi-functional component rather than separate parts, the design reduces product waste through reclosability while minimizing the increase in device complexity.
Solution Approach 2:
The patent merges the sealing function, the gas barrier function, and the tamper indication function into a single integrated closure assembly. The closure body combines the threaded engagement structure with the gas permeation barrier and tamper indicator, reducing the number of separate components needed and thereby limiting the increase in device complexity while achieving waste reduction through reclosability.
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 provides a cost-effective, pressure-resistant, and resealable container that reduces waste and environmental impact while improving consumer satisfaction by allowing easy reclosure and maintaining product freshness.
Implementation Method 1
forming container threads on at least a portion of the neck portion by applying a force against an exterior surface of the neck portion to compress the portion of the neck portion against the threaded closure
Data Source
AI summary
The present invention relates generally to a container that may be sealed and reclosed with a threaded closure. More specifically, the present invention relates to methods of manufacturing a metallic container having an opening with inwardly facing threads that are formed after a threaded closure is inserted at least partially into the opening. The container opening may be selectively sealed and reclosed with the threaded closure which releasably engages the container threads.