Staggered Container Perforations for Lower Opening Force
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Solution Overview
Problem
Existing product dispensing systems require significant user effort to open packaging containers, as the force distribution across perforations or cuts is even, making it difficult to initiate tearing, especially for users who need less force.
Innovation Solution
The use of staggered perforations or cuts in the container's weakening features allows for easier opening by directing force alternately between perforations, reducing the necessary force required to break the perforations and facilitating the formation of an access opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If even force distribution across perforations is used, then the container structure is simple and strong, but significant user effort is required to open the packaging
Solution Approach 1:
The patent applies asymmetry by staggering the perforations in a non-uniform pattern rather than distributing them evenly. The perforations are arranged with varying spacings, creating asymmetric force distribution points that allow a user to initiate tearing more easily by applying force to strategically positioned perforations, thereby reducing the overall opening force required.
Solution Approach 2:
The patent segments the opening force requirement by creating multiple staggered perforation rows that can be torn sequentially. Instead of requiring simultaneous breaking of evenly distributed perforations, the staggered arrangement allows the tearing process to progress through segments of perforations in sequence, reducing the peak force needed at any single moment.
2Ease of operation
If staggered perforations are used, then the force required to open the container is reduced, but the manufacturing complexity increases
Solution Approach 1:
The patent changes the spatial parameters of the perforation arrangement by introducing staggered positioning with specific offset distances between perforation rows. This parameter modification creates the asymmetric pattern that reduces opening force while remaining compatible with standard perforation-making equipment, thus balancing manufacturing feasibility with operational ease.
Data Source
AI summary
A product dispensing system including a container having a plurality of walls that define an internal volume and an opening into the internal volume, wherein the container defines a first arrangement of perforations extending in a first row from the opening and a second arrangement of perforations extending in a second row from the opening, wherein the first perforations are staggered by a distance relative to the second perforations.