Ring Pull Bottle Crown Assembly for Low-Force Opening
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Solution Overview
Problem
Current bottle crowns are difficult to open manually due to their tight seal, often requiring excessive force, which can cause injury and spillage, and existing solutions like ring pull crowns are hard to manufacture using standard capping machines.
Innovation Solution
A method and system for manufacturing ring pull bottle crowns that involve forming crown bodies and pull ring and tab assemblies from different materials, combining them, and creating a corrugated skirt for easy opening and standard machine compatibility, allowing for efficient production of crowns that can be easily opened with minimal force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tight seal is created to prevent spillage and maintain pressure, then sealing reliability is improved, but the force required to open the bottle increases
Solution Approach 1:
The crown is divided into two separate components: a crown body for sealing and a pull ring assembly for opening. The pull ring is attached to the crown body via a frangible connection that breaks during opening, separating the sealing function from the opening function. This allows the seal to be strong while requiring minimal opening force.
Solution Approach 2:
The pull ring assembly is extracted as a separate functional element from the crown body. It includes a pull tab that extends through the crown, allowing users to apply opening force without gripping the crown edges directly. This extraction enables easy opening while maintaining seal integrity.
2Ease of manufacture
If ring pull crowns are manufactured using standard capping machines, then manufacturing complexity is reduced, but the structural requirements for the crown increase
Solution Approach 1:
The crown body is designed with a universal flanged skirt that fits standard capping machines and bottle openings. The pull ring assembly is configured to be attachable to this universal crown body, allowing the same crown body design to work with both traditional and pull-ring opening mechanisms using standard equipment.
Solution Approach 2:
The pull ring and tab assembly is pre-formed as a separate component before attachment to the crown body. This preliminary preparation allows standard capping machines to simply attach the pre-assembled pull ring to the crown body without requiring complex integrated manufacturing processes.
3Ease of manufacture
If the pull tab is made from the same material as the crown body, then manufacturing simplicity is improved, but the tab may not provide sufficient leverage for easy opening
Solution Approach 1:
The pull tab is made from a different material than the crown body - specifically, a more flexible material that can be bent and shaped to create an ergonomic pull surface. This material difference allows the tab to provide better leverage and user comfort while the crown body maintains its structural integrity for sealing.
Data Source
AI summary
Equipment and related methods for manufacturing ring pull crowns are disclosed herein. In one embodiment, a method of manufacturing a ring pull crown may include forming a plurality of crown bodies from a first source material, and forming a plurality of pull ring and tab assemblies from a second source material. In addition, such a method may include forming a plurality of ring pull crowns by combining each crown body of the plurality of crown bodies with a corresponding pull ring and tab assembly from the plurality of pull ring and tab assemblies. Also, such method may also include forming a circumferential skirt that descends below a top of each ring pull crown, and removing the plurality of ring pull crowns from the first source material.