Container Neck A-Bead Protrusion for Stable Hinged Closure Opening
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Solution Overview
Problem
Existing container designs with hinged, tethered closures often fail to effectively maintain the closure in an open position, leading to potential spillage and user inconvenience during re-closure.
Innovation Solution
The integration of a protrusion on the A-bead of the container neck, which biases the closure body further away from the neck, combined with an A-bead that engages with the retention band to keep the closure open, and a protrusion that facilitates easier reapplication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the closure is designed to hinge open without additional engagement features, then the device complexity is reduced, but the stability of the open position deteriorates leading to potential spillage
Solution Approach 1:
The protrusion on the A-bead acts as an intermediary element that mediates between the closure tab and the closure body. When the tab engages with the protrusion, it creates a stable open position without requiring complex additional engagement mechanisms. The protrusion serves as a simple geometric feature that provides the necessary mechanical interference to maintain reliability.
2Reliability
If the protrusion extends beyond the T-diameter of the thread, then the closure can be biased further away from the container neck improving open position stability, but the manufacturing precision requirements increase due to potential interference with threading operations
Solution Approach 1:
The protrusion is designed with specific local dimensional characteristics - its diameter is controlled to be less than or equal to the T-diameter of the thread, while its height extends sufficiently to provide the desired closure biasing force. This local quality control allows the protrusion to perform its stabilizing function without interfering with the overall threading operation, resolving the conflict between reliability and manufacturing precision.
3Object-affected harmful factors
If the A-bead engages with the retention band to maintain closure openness, then the spill risk is reduced, but the device complexity increases due to additional engagement components
Solution Approach 1:
The protrusion is merged with the A-bead structure, combining two functional elements into a single integrated component. The A-bead provides the primary engagement with the retention band to maintain closure openness, while the protrusion on the A-bead provides additional biasing force on the closure tab. This merging reduces device complexity compared to having separate components for each function, while still effectively reducing spillage risk.
Data Source
AI summary
A protrusion on a container neck is provided. The protrusion is configured to interface with hinged, tethered closures to bias the body of the closure away from the container neck.