Fast-Opening Cap With Cam Extension And Multi-Thread Coupling
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Solution Overview
Problem
Existing caps for containers, especially those with snap or screw arrangements, face issues with reopening after initial opening, limited access due to hinge arrangements, and slow access due to threading, making them unsuitable for pressurized liquids and inconvenient for use with carbonated beverages.
Innovation Solution
A compact fast-opening cap and mouthpiece assembly featuring a base ring, protective cover, and multi-thread design, where the cover remains stably open due to a cam-like extension and multi-thread coupling, allowing rapid opening and secure sealing, suitable for molding in HDPE and PET materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a snap arrangement with frangible bridges is used to create a seal, then the cap can be securely closed, but the cap returns to closed position after opening, hindering pouring and drinking access
Solution Approach 1:
The cap is divided into two functional segments: a base ring that remains on the mouthpiece and a removable cover. The frangible bridges connect these segments initially to maintain seal integrity, but break upon opening to allow the cover to be completely removed, eliminating the recall elasticity problem and enabling easy pouring and drinking access.
Solution Approach 2:
The cover is extracted from the base ring after opening by breaking the frangible bridges. This separation allows the cover to be completely removed from the mouthpiece area, eliminating the hindrance to pouring and drinking access while the base ring remains to maintain container closure.
2Reliability
If a hinge arrangement is formed between the tamper-proof ring and cover, then the cover is prevented from dispersing, but the access space to the mouth is limited
Solution Approach 1:
The hinge arrangement is segmented into a specific location on the base ring, creating a defined rotation axis. This allows the cover to rotate open fully while remaining attached at a single point, maximizing access space to the mouthpiece while preventing complete dispersion of the cover.
3Reliability
If threading is used between cap and mouthpiece, then secure attachment is achieved, but rapid opening is prevented
Solution Approach 1:
The threaded connection is segmented into multiple threads distributed around the circumference of the base ring. This multi-thread design allows the cover to be unscrewed rapidly by rotating it, as the multiple contact points distribute the unscrewing force and enable faster disengagement compared to a single-thread design.
Data Source
AI summary
A compact fast-opening cap for a container having a mouthpiece with an outer annular perimetric rib, includes a base ring preventing separation from the mouthpiece; a protective cap or cover for opening and closing the mouthpiece; a hinge integrally joining the base ring and the cover; and frangible bridges that connect a lower edge of the cover with an upper edge of the base ring. The hinge includes strips or bridges connecting the cover to the base ring and an extension enlarged outwardly that forms an integral part of a lower end of the cover and that becomes engaged to the perimetric rib of the mouthpiece when the cover rotates around the hinge from a closed to an open position to create a stable positioning in the open position. A multi-thread or multi-start thread. provided inside the cover. is coupled with threads on an external wall of the mouthpiece.