Tearable Closure With Partial Perforations for Sealed Packs
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Solution Overview
Problem
Existing opening mechanisms for sealed containers, such as multi-layer plastic packs, often require complex manufacturing processes and external materials, making them either difficult to open or prone to inadvertent opening, while maintaining package integrity during transit.
Innovation Solution
The use of non-penetrating perforations or score lines within the flap material, which extend partially into the thickness, allowing for easy opening without sacrificing package integrity, as they are integrated into the same material as the container and not exposed externally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If perforations completely penetrate the flap material to create an opening mechanism, then the flap can be easily opened, but the package integrity is compromised and the flap becomes prone to inadvertent opening
Solution Approach 1:
The patent applies partial action by using non-penetrating perforations that extend only partially into the flap material thickness rather than completely penetrating it. This partial perforation provides enough weakness for easy opening while retaining sufficient material connection to maintain package integrity and prevent inadvertent opening during transit.
2Reliability
If strings or tear strips are integrated into the flap to facilitate opening, then the opening mechanism becomes robust, but the manufacturing complexity and costs increase
Solution Approach 1:
The patent merges the opening mechanism directly into the flap material itself rather than integrating external strings or tear strips. The non-penetrating perforations are formed as part of the flap manufacturing process, eliminating the need for separate external components and simplifying manufacturing while maintaining robust opening capability.
Solution Approach 2:
The flap material serves multiple functions: it provides the sealing surface, contains the opening mechanism through integrated non-penetrating perforations, and maintains structural integrity. This multi-functionality eliminates the need for separate external opening components, reducing manufacturing complexity.
3Reliability
If non-penetrating perforations are used to maintain package integrity, then the flap remains strong, but the opening mechanism becomes less effective
Solution Approach 1:
The patent applies local quality by concentrating the weakness at specific locations through non-penetrating perforations while maintaining full material thickness and strength at other areas. The perforations are positioned to create controlled tear paths without compromising the overall flap structure or sealing capability.
Data Source
AI summary
A tearable closure and a container with a tearable closure is disclosed. The tearable closure includes non-penetrating perforations or score lines in and across the tearable closure on a first side, and has continuous film material on the second side. Such tearable closure can be incorporated into one of numerous types of containers, including envelopes, boxes, and bags. The tearable closure can be a flap, a lid, or a tape.