Double Lock Lid With Flexible Tab For Tamper Evidence
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Solution Overview
Problem
Conventional tamper-evident container systems are ineffective as they can be opened without damaging the seal, and they do not improve container performance in quality tests such as drop tests and leak tests, while also being challenging to manufacture due to intricate molding geometries.
Innovation Solution
A double locking container system featuring a lid with a peripheral annular skirt and flexible locking tabs that require tearing to remove, providing a tamper-evident seal and improved performance in drop, vibration, and leak tests, with a simplified manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an annular sealing bead is used for tamper-evident sealing, then the container can indicate tampering, but it can be opened without damaging the seal using a sharp object to pry open
Solution Approach 1:
The single annular sealing bead is divided into multiple discrete locking beads arranged circumferentially. Each locking bead is a separate engagement element that must be individually overcome to open the container, making prying ineffective compared to a continuous bead that can be leveraged.
Solution Approach 2:
The locking beads are positioned at specific locations around the container opening, creating localized high-strength engagement points. The reinforced container opening and specific geometry of each bead create zones of concentrated strength that resist localized prying forces.
2Reliability
If intricate molding geometries are used for tamper-evident features, then tamper proofing is improved, but manufacturing becomes challenging and cooling is difficult
Solution Approach 1:
The complex sealing function is segmented into multiple identical locking beads rather than one intricate continuous bead. This modular approach simplifies the mold cavity design, allowing for easier cooling channel placement and more straightforward manufacturing while maintaining security through the multiplicity of engagement points.
Solution Approach 2:
The design transitions from a continuous annular bead to discrete bead elements, changing the geometric parameter from a continuous curve to separate circular or arc-shaped elements. This parameter change simplifies the molding process while maintaining the tamper-evident function through the collective engagement of multiple beads.
3Reliability
If conventional annular beads are used, then tamper indication is provided, but container performance in drop tests and leak tests is not improved
Solution Approach 1:
The locking mechanism is segmented into multiple discrete beads that collectively provide both tamper indication and enhanced mechanical strength. The distributed engagement points around the container opening reinforce the structure against drop impacts and prevent leakage under vibration, while still providing clear tamper evidence when compromised.
Solution Approach 2:
The lid and container are formed from resilient materials that work in conjunction with the locking bead geometry to provide both sealing and structural reinforcement. The combination of material properties and the multi-bead mechanical engagement creates a composite system that excels in both tamper evidence and physical performance tests.
Data Source
AI summary
A container system including a lid and a container is provided. A locking structure on the skirt of the lid is situated on a tear off portion and comprises a plurality of flexible tabs positionable in an upwardly biased locked position each independently engaging the container within an annular cut away on the container wall below a locking rib. If the lid is removed with tear off strip still engaged, the flexible tabs are biased downwardly and may break off, exposing tampering.