Tamper-Evident Resealable Closure with Segmented Tear Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing resealable food containers lack an effective tamper-evident indicator that prevents the wrapper from tearing, compromising the package's integrity when the sealing layer is pulled back.
Innovation Solution
A tamper-evident resealable closure featuring a first and second tear line in a film layer, with a sealing layer that includes an adhesive for resealing and a slit forming an elongated strip, which provides visual indication of opening and maintains package integrity by directing residual adhesive force to the opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If die-cut elongated strips are used as tamper-evident indicators, then tamper evidence is provided, but the wrapper adjacent to the strips may become torn when the sealing layer is pulled back
Solution Approach 1:
The closure is divided into multiple sections: a sealing section with the sealing layer, a first panel section defined by a first tear line, and a second panel section defined by a second tear line. This segmentation allows the tamper-evident indicator (second panel section) to be separated from the main wrapper structure through a controlled tear line, preventing the wrapper from tearing while still providing tamper evidence when the indicator falls into the container
Solution Approach 2:
A second film layer with adhesive is introduced as an intermediary element. This adhesive layer is disposed on the first film layer and covers both the first and second panel sections. The adhesive provides resistance to the pulling force when the sealing layer is removed, directing the force to the controlled tear lines rather than causing uncontrolled tearing of the wrapper, thus protecting wrapper integrity while maintaining tamper evidence functionality
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures the package remains sealed and intact by directing adhesive force to the opening, preventing tears and providing a clear visual indication of initial opening even after resealing.
Implementation Method 1
The second film layer includes an adhesive layer for resealably adhering a second film layer such that the first panel section is separated from the second film layer
Data Source
AI summary
A container for a food product including a tamper-evident closure which forms an opening of a container. The closure comprises a sealing layer, adhesively sealed to the top of the container around the opening. The sealing layer is releasable from the container by pulling back on the sealing layer and resealable against the top layer to seal the opening when the sealing layer is moved back against the top. The tamper-evident feature comprises a portion of the top adjacent the opening and covered by the sealing layer, which extends from a position spaced from, and extends towards and terminates at the opening of the container. A portion of the tamper-evident feature falls into the container after the sealing layer has been pulled back for a first time to thereby indicate that the container has been previously opened.