Plug-Type Closure With External Threads for Internal Container Sealing
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Solution Overview
Problem
Existing container closures, such as screw-on caps, often require additional tools for removal and may not provide adequate protection against contamination or efficient material usage, leading to higher manufacturing costs.
Innovation Solution
A plug-type closure with external threads that mate with internal container threads, featuring an annular wall for additional sealing and protection, reducing material usage and manufacturing costs while providing a lightweight finish.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional screw-on caps are used, then the closure can seal the bottle opening, but additional tools are required for removal and material usage is inefficient
Solution Approach 1:
The closure is divided into two functional parts: a cap body for sealing the opening and a plug body with external threads for engagement with the container. This segmentation allows each part to be optimized independently, reducing overall material usage while maintaining sealing functionality.
Solution Approach 2:
Instead of the conventional design where the cap has internal threads and the bottle neck has external threads, this invention inverts the threading arrangement: the plug body on the closure has external threads that mate with internal threads in the container neck. This inversion simplifies the cap structure and reduces material requirements.
2Object-affected harmful factors
If conventional closures are used, then the bottle opening is sealed, but adequate protection against contamination is not provided
Solution Approach 1:
The plug body is positioned within the cap body, creating a nested structure where the plug provides internal sealing and contamination protection while the cap body provides external sealing. This nested arrangement maximizes protection functionality within minimal material volume.
Solution Approach 2:
Different regions of the closure are assigned specific functions: the plug body with external threads provides leak-resistant sealing at the interface with the container, while the cap body provides the primary seal at the bottle opening. This localized functional assignment ensures adequate contamination protection with efficient material distribution.
3Weight of moving object
If traditional cap designs are used, then the closure can be removed with a bottle opener, but light weight finishes and efficient material use are not achieved
Solution Approach 1:
The heavy metal cap structure is replaced with a lighter plug-type closure made from alternative materials. The essential sealing and engagement functions are extracted and maintained through the plug body design, eliminating the need for heavy traditional cap construction while achieving light weight finishes.
Solution Approach 2:
The invention changes material parameters by transitioning from traditional heavy cap materials to lighter materials suitable for plug-type closures. This parameter change enables weight reduction while maintaining structural integrity and sealing performance, achieving efficient use of finish material.
Data Source
AI summary
A plug-type closure for use with internally threaded containers. The container includes a container body and a neck defining an internal thread. The closure includes a cap body having an annular wall extending outwardly from the cap body, configured to shroud the neck of the container. The closure further includes a generally cylindrical plug body operatively attached to and extending outwardly from the cap body. The plug body includes a thread that engages with the corresponding internal thread of the container neck to provide a leak-resistant seal.