Tamper-Evident Closure With Frangible Separable Portion
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Solution Overview
Problem
Conventional closure systems require high force to remove or breach the liner membrane, especially when it is thick or made from durable materials, which can be inconvenient for users.
Innovation Solution
A tamper-evident closure body design featuring a separable portion connected to the peripheral portion by frangible connections and an opening member with a grippable and puncture portion, allowing for reduced force to initiate and propagate a tear in the liner membrane, facilitating easier separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick or durable liner membrane is used to seal the container, then the product protection and tamper evidence are improved, but the force required to remove or breach the liner membrane increases
Solution Approach 1:
The closure body is divided into a peripheral portion and a separable portion that can be separated from each other. The separable portion is specifically designed to be removed after product dispensing, while the peripheral portion remains on the container. This segmentation allows the liner membrane to be breached and removed with reduced force since users only need to overcome the frangible connection strength rather than the full bonding strength between the liner and the entire closure body.
2Reliability
If a thick or durable liner membrane is used to seal the container, then the tamper evidence function is improved, but the ease of operation to open the package deteriorates
Solution Approach 1:
The closure body is pre-configured with a separable portion that is designed to be easily removed. An opening member with a puncture portion is provided to facilitate the preliminary action of breaching the liner membrane. The user simply needs to insert the puncture portion through the liner and pull the separable portion away, making the opening process simple despite the durable liner membrane.
3Reliability
If a high bonding strength seal is used between the liner membrane and container, then the product containment is improved, but the force required to breach the liner membrane increases
Solution Approach 1:
The closure body is segmented into a peripheral portion that maintains the high bonding strength seal with the container and a separable portion that is easily removable. This allows the liner membrane to be securely sealed during storage and transport, but enables easy breaching during use by separating the closure body into two parts, requiring force only to break the frangible connection rather than overcome the full seal strength.
Data Source
AI summary
A closure body (40) is provided for installation with a liner membrane (52) on a container (44). The closure body (40) has a peripheral portion (74) for being mounted on the container (44) around an access opening (48), and a separable portion (82) that (i) is disposed laterally inwardly of the peripheral portion (74); (ii) is initially connected to the peripheral portion (74) by at least one frangible connection (86); and (iii) can be separated from the peripheral portion (74) upon breaking of the at least one frangible connection (86). The closure body (40) has an opening member (94) that is connected with the separable portion (82) to accommodate movement of the opening member (94) relative to the separable portion (82). The opening member (94) has a grippable portion (102) and a puncture portion (106) each disposed in an initial inactive orientation relative to the separable portion (74).