Tamper-Evident Container Perforation and Coupling Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional plastic containers lack tamper-evidence, leading to unauthorized opening, food contamination, and damage to the container, which results in food spoilage and economic losses.
Innovation Solution
A tamper-evident container design featuring a tray with a first coupling unit and a cover with a second coupling unit, both equipped with perforation lines that tear off when force is applied, allowing clear identification of unauthorized opening and preventing re-sealing, while maintaining air tightness and structural strength through recesses and projections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the container is made clear to allow inspection of food, then consumers can observe food freshness, but unauthorized opening becomes easier and food contamination risk increases
Solution Approach 1:
The container lid is divided into multiple segments including a first lid portion, a second lid portion, and a bridge portion connecting them. The bridge portion includes a first tearing line that separates the lid into distinct sections. This segmentation allows the lid to remain intact for normal use while providing a controlled failure point (tearing line) that indicates unauthorized opening, thus maintaining both visibility and food protection reliability.
Solution Approach 2:
A tamper-evident label is introduced as an intermediary element between the lid and the food. This label includes a second tearing line and visual indicators that change or become visible when the lid is opened. The label acts as a mediator that provides tamper evidence without interfering with the clear visibility function of the container body, resolving the contradiction between transparency and protection.
2Reliability
If the container is sealed to prevent contamination, then food freshness is maintained, but unauthorized opening cannot be detected
Solution Approach 1:
The tamper-evident label and tearing lines provide visual feedback about the opening status of the container. When the lid is opened, the tearing lines break and the label changes appearance, providing immediate visual feedback that indicates unauthorized opening. This feedback mechanism allows detection of tampering while maintaining the sealed state during normal use, resolving the contradiction between protection and detection.
Solution Approach 2:
The tamper-evident label incorporates visual indicators that change color or appearance when the container is opened. This color change or visual transformation provides clear detection of unauthorized opening while maintaining the sealed appearance during normal use. The visual change serves as permanent evidence of tampering, resolving the contradiction between maintaining seal integrity and detecting opening.
3Ease of operation
If the lid is made detachable for easy opening, then ease of operation is improved, but tamper evidence is lost and re-sealing becomes possible
Solution Approach 1:
The lid is segmented into multiple portions connected by a bridge with a tearing line. Normal opening requires breaking the tearing line, which is a controlled failure that provides tamper evidence. This segmentation allows easy opening through the tearing line while preventing re-sealing, as the torn tearing line cannot be reattached. This resolves the contradiction between ease of opening and tamper evidence by making the opening process itself the evidence.
Solution Approach 2:
The tearing lines are pre-formed in the lid structure during manufacturing. These pre-formed weak points are designed to break at a specific location when the lid is opened, providing controlled failure that creates tamper evidence before the opening is completed. This preliminary preparation ensures that any opening action leaves evidence while still allowing convenient opening, resolving the contradiction between ease of operation and tamper evidence.
4Ease of manufacture
If the container structure is simplified, then manufacturing cost is reduced, but tamper evidence function is compromised
Solution Approach 1:
The tamper-evident label and the lid structure are merged into a single integrated component. The label is formed as part of the lid assembly, combining the sealing function and tamper evidence function into one structure. This merging reduces the number of separate parts and simplifies manufacturing while maintaining the tamper evidence function, resolving the contradiction between manufacturing simplicity and functional reliability.
Solution Approach 2:
The lid assembly is designed to perform multiple functions simultaneously: sealing the container, providing tamper evidence through tearing lines, and maintaining structural integrity. The bridge portion and tearing lines are integrated into the lid structure itself, allowing the same component to serve both sealing and evidence-providing functions. This multi-functionality reduces manufacturing complexity while maintaining tamper evidence reliability.
Data Source
AI summary
A tamper-evident container generally includes a tray having an opening with a step section formed around the opening and including a first protrusion section that is provided with a first coupling unit with a first perforation line formed therebetween. The first coupling unit includes a coupling trough. A cover includes a concave groove having a bottom and an outside surface engageable with the step section to close the opening. The cover includes a second protrusion section and a second coupling unit between which a second perforation line is formed and projecting beyond the first perforation line. The second coupling unit has a coupling member receivable in and engageable with the coupling trough. Tearing off the first and second perforation lines allows the first and second coupling units to detach from the tray and the cover, respectively with the second protrusion section projecting outside the tray for easy gripping.