Concealed Opening Bag With Segmented Support Web
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Solution Overview
Problem
Existing packaging bags with closure devices, such as those with complementary profiles, are difficult to open without damaging the bag, especially when designed to prevent access by children, and often require significant force or difficulty in reclosing.
Innovation Solution
A packaging bag design featuring a closure assembly with support webs that allow for easy opening by creating a passage between the support web and the bag wall, enabling local deformation of the closure elements and facilitating separation of the complementary profiles, while maintaining resistance to internal and external stresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the support web is hinged on the wall to prevent separation of closure profiles under internal pressure, then the closure resistance is improved, but the ease of opening deteriorates
Solution Approach 1:
The support web is segmented into multiple attachment zones along its length. The first attachment zone is positioned away from the closure profile while the second attachment zone is positioned near the closure profile. This segmentation allows the support web to provide hinge-like resistance to separation forces while still permitting controlled opening through the concealed passage.
Solution Approach 2:
A concealed passage is introduced as an intermediary element between the support web and the wall. This passage allows the support web to be locally deformed and pulled away from the wall during opening, facilitating easy separation of closure profiles while maintaining the hinge effect for closure resistance when closed.
2Strength
If the support web is rigidly fixed to the wall, then the closure strength is improved, but the ability to allow easy opening deteriorates
Solution Approach 1:
The support web is divided into multiple attachment zones rather than being rigidly fixed along its entire length. The first attachment zone provides anchor points while the second attachment zone near the closure profile allows controlled movement. This segmented attachment provides strength for closure while enabling easy opening through the concealed passage.
Solution Approach 2:
The attachment configuration transitions from a static rigid fixation to a dynamic system where the support web can change its degree of freedom. When closed, the web maintains strong attachment for closure strength. When opening is initiated, the concealed passage allows the web to be locally deformed and pulled away, transitioning to a more compliant state that facilitates easy opening.
3Reliability
If the closure profiles are designed to resist opening forces, then the security against unauthorized access is improved, but the difficulty of legitimate opening increases
Solution Approach 1:
The concealed passage acts as an intermediary mechanism that differentiates between legitimate and unauthorized opening attempts. For legitimate opening, the passage allows controlled local deformation of the support web and easy separation of closure profiles. For unauthorized access attempts (such as by children), the hinge effect and concealed passage design maintain resistance, ensuring security against unauthorized access while facilitating legitimate opening.
Data Source
AI summary
Sachet 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), the first support web (30) being connected discontinuously along its length to the first wall (10) of the sachet (1) so as to form at least one passage (40) between this first support web (30) and the first wall (10) of the sachet (1) from the outside of the sachet (1), said passage (40) allowing local deformation of the first support web (30) for modifying the relative local orientation of the closure elements (34) while the walls (10, 20) are being moved apart and making it easier to separate the closure elements (34).