Concealed Opening Sachet With Segmented Support Web
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Solution Overview
Problem
Existing packaging bags with closing mechanisms, such as complementary profiles, are difficult to open without damaging the bag, making it challenging to access contents while ensuring the bag remains closed, especially for harmful products like washing tablets, where easy and repeated opening and closing are necessary to prevent child access.
Innovation Solution
The bag design features a support web connected continuously to one wall and discontinuously to the other, allowing for a passage that facilitates easy opening by rotating the support webs around the closure elements, with an additional wall configuration that enhances the bag's resistance to stresses and ensures secure closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the support web is articulated on the wall to prevent internal pressure from separating closure strips, then the closure reliability is improved, but the ease of opening deteriorates as the hinge effect generates resistance
Solution Approach 1:
The support web is segmented into a first portion and a second portion, with the closure element carried by the second portion. This segmentation allows the first portion to be articulated on the wall (providing hinge effect for reliability) while the second portion remains flexible and accessible (enabling easy opening by children). The closure element is thus separated from the articulated portion, reducing the hinge effect's resistance to opening.
Solution Approach 2:
Different portions of the support web are given different properties: the first portion is articulated on the wall to provide structural stability and prevent pressure-induced separation, while the second portion is made more flexible and accessible to allow easy opening. The closure element is specifically positioned on the second portion to optimize both security and accessibility.
2Strength
If the support web is fixed continuously to the wall, then the structural strength is improved, but the ease of opening deteriorates due to increased resistance
Solution Approach 1:
The support web is divided into segments with different attachment characteristics. The first portion is articulated (providing rotational freedom), while the second portion is continuously fixed (providing structural strength). This segmentation allows the closure element to be positioned on the strongly fixed second portion while the articulated first portion provides opening facilitation through its rotational capability.
Solution Approach 2:
Instead of fixing the entire support web continuously to the wall (which would provide strength but hinder opening), the invention inverts the approach by articulating the first portion (normally the less secure attachment) to facilitate opening, while maintaining continuous fixation on the second portion (where the closure element is located) to ensure strength and security.
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
This design allows for easy and repeated opening and closing of the bag without damaging it, ensuring secure closure and resistance to internal and external stresses, while preventing child access to contents.
Implementation Method 1
the support web is articulated on the wall so that the traction on the walls of the bag when the complementary closing elements are engaged causes the rotation of the support web around said closure element
Data Source
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AI summary
Sachet having a concealed opening, comprising: a first and a second wall (10, 20), a closure assembly (3) comprising a first and a second support web (30, 32) that are connected to the first and the second wall (10, 20), respectively, and each have a closure element (34).