Food Container Closure Flap for Visible Tamper Evidence
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Solution Overview
Problem
Existing tamper-evident features for food containers often result in waste and do not provide a clear indication that the container has been opened, posing a concern for consumers and vendors.
Innovation Solution
A tamper-evident food container with a release flap and closure tab integrally formed, featuring offset score lines and extension lines to ensure visible tampering evidence without material removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional tamper-evident features are used, then tampering indication is provided, but material removal is required resulting in waste
Solution Approach 1:
The closure system is divided into separate functional components: a closure tab with tear strip for opening, and a release flap for securing and indicating. This segmentation allows the tamper-evident function to be achieved through the release flap's positioning rather than material removal, eliminating waste while maintaining reliability.
Solution Approach 2:
The release flap acts as an intermediary element between the closure tab and the container opening. It provides the tamper-evident indication through its positioned relationship with the opening rather than through material removal, thus achieving reliable indication without waste.
2Reliability
If conventional tamper-evident features are used, then opening indication is provided, but the indication is not clear or visible without closer inspection
Solution Approach 1:
The release flap incorporates visual indicators such as colored regions or contrasting patterns that change or become visible when the flap is moved or torn. This makes the tamper-evident indication clearly visible to consumers without requiring closer inspection, while maintaining reliable indication of opening status.
Solution Approach 2:
The release flap provides tamper evidence through its three-dimensional positioning and movement rather than relying solely on two-dimensional surface markings. The flap's physical displacement or tearing creates a visually apparent indication that is easily detectable from a distance.
3Ease of operation
If the closure tab is released by the release flap, then the container can be opened, but the closure tab must be securely repositioned to maintain closure
Solution Approach 1:
The closure tab is designed to be self-retaining through its interaction with the release flap and container structure. Once the release flap is torn or moved, the closure tab automatically maintains its closed position through friction, geometry, or interlocking features, eliminating the need for complex active retention mechanisms and simplifying the overall device.
Solution Approach 2:
The closure system transitions from a static sealed state to a dynamic state during opening, and back to a static closed state. The release flap's tear line and the closure tab's movement path are designed to enable easy transition while maintaining simplicity in the closed and open states, balancing ease of operation with device complexity.
Data Source
AI summary
Unitary blank for forming a container having a body portion with a plurality of fold lines and a cover portion. The body portion with a plurality of fold lines define a plurality of body wall portions, and each body wall portion has an upper edge. A first body wall portion includes a closure tab extending from the upper edge of the first body wall portion. The closure tab includes a closure tab flap portion and a closure tab base portion. The cover portion extends from the upper edge of a second body wall portion. The cover portion includes a cover portion flap score line extending along an upper edge of the cover portion and a release flap. A food container having a body portion and a cover portion is also provided.