Tamper-Evident Roll-On Closure With Segmented Engagement Surface
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Solution Overview
Problem
Existing tamper-evident closures pose challenges in recycling as the attached elements become pollutants due to difficulty in separation from the container, hindering effective recycling and increasing environmental impact.
Innovation Solution
A container design featuring a neck with a screw thread and an engagement surface, allowing for complete removal of the tamper-evident closure after the first opening, enabling separate recycling of the container and closure components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tamper-evident closure element is designed to remain attached to the container after first opening, then the closure provides continuous protection and reliability, but the element becomes a pollutant that hinders recycling of the container
Solution Approach 1:
The engagement surface is divided into two distinct parts: a first part on the lower portion and a second part on the upper portion. This segmentation allows the closure to be separated into removable and non-removable elements, enabling the container to be recycled separately while maintaining protection during use
Solution Approach 2:
The design extracts the tamper-evident element from the main container body by providing a specific engagement geometry that allows the closure portion to be completely removed after first opening, separating the protective function from the recyclable container
2Reliability
If the closure element remains attached to the container for the entire useful life, then the closure maintains its protective function, but normal separation techniques cannot separate the container from the element
Solution Approach 1:
The engagement surface is segmented into two parts located on different portions of the neck, creating distinct engagement zones that facilitate controlled separation while maintaining attachment during the useful life
Solution Approach 2:
The closure transitions from a static attached state to a dynamic separable state through the engineered engagement surface geometry, allowing it to remain attached during normal use but be separated when needed for recycling
3Strength
If the screw thread crest diameter is greater than the engagement surface minimum diameter, then the closure provides greater strength and stability, but the engagement surface geometry becomes more complex
Solution Approach 1:
The engagement surface is extended along the longitudinal axis of the neck, utilizing the axial dimension to create overlapping engagement zones. This dimensional approach allows the engagement surface to provide sufficient strength through extended contact area while maintaining a relatively simple geometric form
Data Source
AI summary
The present invention relates to a tamper-evident closure of the roll-on type which comprises an engagement surface, suitable for engaging with a corresponding engagement surface provided on the neck of a container, wherein the engagement surfaces permit the complete removal of the closure after the first opening.