Inclined Sealing Cap Geometry for Variable Bottle Necks
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Solution Overview
Problem
Existing sealing caps for bottles require precise dimensional adjustments to fit different sizes of bottle necks, which is not compatible with the dimensional variability of standard injection blow molded bottles, and fail to provide a secure seal across varying neck diameters.
Innovation Solution
A sealing cap with an inclined sealing surface and cap thread design, featuring an inclination angle between 7° and 25° and an axial length of the cap thread greater than 1.5 times the pitch, allowing for a universal fit across different bottle neck sizes, ensuring a homogeneous sealing contact and easy handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cylindrical sealing skirt is used to engage with the bottle neck, then a secure seal can be achieved, but precise dimensional adjustment is required for each bottle neck size
Solution Approach 1:
The patent changes the geometric parameters of the sealing skirt from a cylindrical shape to an inclined sealing surface with a specific angle (7° to 25°). This parameter change allows the sealing surface to accommodate variations in bottle neck dimensions without requiring precise dimensional adjustment for each size, as the inclined surface can adapt to different diameters while maintaining sealing effectiveness.
Solution Approach 2:
The inclined sealing surface design provides universal compatibility across multiple bottle neck sizes. Instead of requiring specific dimensional adjustments for each bottle size, the same sealing cap design with the inclined surface can effectively seal various bottle neck diameters, making the closure system multi-functional and adaptable to different container sizes.
2Reliability
If precise dimensional adjustment is made for each bottle neck size, then a secure seal is achieved, but compatibility with standard injection blow molded bottles is lost
Solution Approach 1:
By changing the sealing surface geometry from cylindrical to inclined with a moderate angle (7° to 25°), the patent enables the sealing cap to accommodate the dimensional variability inherent in standard injection blow molded bottles. The inclined surface allows for adaptation to different neck diameters within the standard range without requiring custom dimensional adjustments for each bottle size.
3Adaptability or versatility
If the axial length of the cap thread is increased, then secure attachment across various bottle neck sizes is achieved, but the device complexity increases
Solution Approach 1:
The patent specifies a minimum axial length for the cap thread (≥1.5 times the pitch) to ensure adequate engagement and secure attachment across various bottle neck sizes. This parameter specification balances the need for adaptability with maintaining reasonable device complexity, as the thread geometry and engagement length are clearly defined to achieve universal fit without excessive complexity.
Data Source
AI summary
A sealing cap, which engages a neck of a bottle, including a top wall from which extend a sidewall and a sealing skirt. The sidewall includes a cap thread to be screwed onto a neck thread of the neck of the bottle around a screwing axis. The sealing skirt includes an inclined sealing surface to be pressed against a corresponding surface of the neck on an opposite side from the surface including the neck thread, upon screwing the cap thread onto the neck thread. The inclined sealing surface is formed by a wall of the sealing skirt surrounding a cavity. An inclination angle between the inclined sealing surface and the screwing axis is between 7° and 25°. An axial length of the cap thread, taken parallel to the screwing axis, is higher than or equal to 1.5 times a pitch of the cap thread.