Polygonal Closure with Resilient Projections for Baby Bottles
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Solution Overview
Problem
Existing closures for containers, such as screw caps and snap-on lids, often require complex operations for opening and closing, and may not provide a secure seal or easy removal, especially in applications like baby feeding bottles where one-handed operation and ease of cleaning are crucial.
Innovation Solution
A polygonal-shaped closure system with inter-engageable projections and camming surfaces on a resilient lid and container, allowing for snap-fit assembly and easy twist-off removal, featuring a teat and subsidiary cap for baby bottles that can be stacked efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screw cap closures are used, then secure sealing is achieved, but complex operation is required for opening and closing
Solution Approach 1:
The closure system is divided into separate functional elements: a lid with skirt, a container with rim, and inter-engageable projections. This segmentation allows the sealing function to be separated from the fastening function, enabling simple snap-fit operation while maintaining reliable sealing through the resilient liner.
Solution Approach 2:
Instead of requiring rotational motion to engage and disengage the closure (as in screw caps), the invention inverts the operation by using axial snap-fit engagement for easy closing and simple pull-off or twist for opening. The inter-engageable projections with small angular extent allow the closure to be secured and released without complex threading operations.
2Ease of operation
If press-fit or snap-on lid closures are used, then ease of operation is improved, but secure sealing may not be achieved
Solution Approach 1:
The closure system combines rigid components (lid, skirt, rim) with a resilient liner or ring of elastomeric material. This composite construction allows the rigid parts to provide structural integrity and snap-fit engagement, while the resilient liner ensures reliable sealing against the container opening, resolving the contradiction between ease of operation and sealing security.
3Reliability
If bayonet closure with multiple projecting members is used, then secure connection is achieved, but device complexity increases
Solution Approach 1:
The invention extracts the essential fastening function from complex multi-projection bayonet closures and implements it through simplified inter-engageable projections with small angular extent. This reduction maintains secure connection through the resilient material's elastic deformation while eliminating unnecessary structural complexity, achieving reliable closure with fewer and simpler engagement features.
4Reliability
If conventional closures are used, then closure security is achieved, but ease of cleaning is reduced due to narrow opening
Solution Approach 1:
The closure system uses a dynamic resilient liner that can be compressed during engagement to secure the closure, yet allows the lid to be easily removed for cleaning. The polygonal shape with inter-engageable projections provides secure closure during use, while the simple snap-fit design enables quick removal and access to the container interior for thorough cleaning, resolving the contradiction between closure security and ease of cleaning.
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 closure system enables easy, one-handed operation and secure sealing, preventing accidental opening when dropped, and facilitates cleaning with a wide mouth design, while allowing for efficient stacking and use as a storage container.
Implementation Method 1
wherein the material of one or both of the skirt and container portion is resiliently elastic
Data Source
AI summary
Closures are provided consisting of a lid or cap member and a container member. These are inter-engageable with one another. The lid or cap member has a skirt and the container member has an upstanding rim, each of which is of generally polygonal (preferably square) shape. Located on each of the facing walls on each side of the polygonal shape are inter-engageable projections. The inter-engaging surfaces of the projections run substantially in a plane perpendicular to the axis of the polygonal shape and are of relatively small angular extent about that axis. The material of one or both of the skirt and container portion is resiliently elastic. The closure may be assembled with an axial push, and removed by twisting.