Snap-Fit Plastic Closure Ring for Containers
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Solution Overview
Problem
Existing securement methods for plastic closures on containers, particularly glass containers, are inefficient and prone to application issues, with prior art constructions often requiring complex threads or tamper-indicating mechanisms that increase closure application time and risk of unintentional removal.
Innovation Solution
A one-piece integrally molded plastic closure with a snap-fit design featuring a plastic ring and hinged lid, where the ring is secured over an external bead on the container neck finish, and the lid is snapped into place using conical surfaces for alignment and stability, providing a low-profile and tamper-indicating seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex threads or tamper-indicating mechanisms are used for securing plastic closures, then the closure can be securely fastened to the container, but the closure application time increases and the risk of unintentional removal increases
Solution Approach 1:
The closure system is divided into two functional segments: a simple snap-fit mounting ring for rapid attachment to the container, and a separate hinged lid with tamper-indicating features for secure sealing. This segmentation allows the mounting function to be performed quickly while the sealing function provides security, eliminating the need for complex threaded mechanisms that slow down application.
Solution Approach 2:
The tamper-indicating mechanism is extracted from the mounting structure and integrated into the lid portion of the closure. This allows the mounting ring to remain simple and quick to apply, while the lid provides both sealing and tamper indication functions, reducing overall application time without compromising security.
2Reliability
If complex threads or tamper-indicating mechanisms are used for securing plastic closures, then the closure can be securely fastened to the container, but the risk of unintentional removal increases
Solution Approach 1:
The closure is segmented into a mounting ring that provides simple snap-fit attachment resistant to unintentional removal, and a hinged lid with tamper-indicating features that requires deliberate action to open. This segmentation creates multiple barriers to unintentional removal while maintaining ease of proper application.
Solution Approach 2:
The hinged lid introduces a dynamic element that requires deliberate user action to open, creating a mechanical barrier to unintentional removal. The hinge mechanism with its moving parts and required activation force provides security against accidental opening while allowing controlled access when needed.
3Productivity
If a one-piece integrally molded plastic closure with snap-fit design is used, then the closure application time is reduced and stability is enhanced, but the design must accommodate both wide-mouth and narrow-neck containers
Solution Approach 1:
The mounting ring is designed with universal adaptability to fit both wide-mouth and narrow-neck container openings. The snap-fit mechanism and conical guiding surfaces are configured to accommodate varying opening dimensions, allowing a single closure design to serve multiple container types without compromising application speed or stability.
Solution Approach 2:
The closure design incorporates adjustable parameters such as the conical angle of the guiding surfaces and the elasticity of the snap-fit features, allowing the same basic structure to adapt to different container opening sizes. This parameter flexibility enables universal compatibility while maintaining rapid snap-fit application across various container types.
Data Source
AI summary
A plastic closure for receipt on a container includes a plastic ring having an internal recess adapted to be received by snap fit over an external crown or bead on the container neck finish such that the ring is retained against axial movement on the container neck finish. A plastic lid is coupled by a hinge to the ring, with the ring, the lid and the hinge being of one-piece integrally molded plastic construction. The lid has a skirt that is adapted releasably to be snapped to the ring in a closed position of the lid over the ring. The lid skirt may have an external bead that is adapted to be received by snap-fit within an internal channel on the ring in the closed position of the lid over the ring, and a conical internal surface on the ring may be provided to guide the bead on the lid into the channel on the ring.