Bag Closure Device with Rotating Extension Webs
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Solution Overview
Problem
Existing packaging bags with closing devices are difficult to open without damaging, especially for accessing contents like dishwasher tablets, and pose a risk of easy access by children, requiring a solution that allows easy opening and closing without damage and prevents child access.
Innovation Solution
A packaging bag design with two walls joined at three sides, featuring support webs with complementary profiles and extension webs that rotate when engaged, making it difficult for children to open but easy for adults, with the closing device positioned internally to prevent direct access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the support webs are fixed directly to the walls at the fastening zones, then the closing profiles are protected from internal pressure, but the bag becomes very difficult to open without damaging the closing device or walls
Solution Approach 1:
The support web is divided into two separate zones: a first fastening zone that attaches to the wall and a second fastening zone that attaches to the extension web. This segmentation allows the closing profile to remain protected from internal pressure while creating a separate opening path through the extension web that does not damage the closing device.
Solution Approach 2:
An extension web is introduced as an intermediary element between the support web and the wall. This extension web provides an alternative fastening point that allows the bag to be opened by detaching the extension web rather than forcing the closing profile apart, thus preventing damage to the closing device.
2Ease of operation
If the closing device is positioned at the mouth of the bag, then it provides easy access for opening and closing, but children can easily access the contents
Solution Approach 1:
The closing device is repositioned from the traditional mouth location to an internal position on the wall. This spatial relocation in another dimension maintains functional accessibility for adults while preventing child access, as children cannot reach the internally positioned closing mechanism.
3Ease of operation
If the support web is articulated on the wall to allow pivoting, then the bag can be opened without separating the closing profiles, but the structure becomes more complex
Solution Approach 1:
The support web is designed with dynamic characteristics, allowing it to pivot or rotate about an axis during the opening process. This dynamic movement enables the first fastening zone to detach from the wall while the second fastening zone remains attached to the extension web, facilitating opening without separating the closing profiles.
Data Source
AI summary
The invention relates to a bag (1) comprising: —two walls (10, 20), —two support webs (12, 22), each comprising at least one complementary section (3), an upper edge (12a, 22a), —two extension webs (14, 24), each comprising an upper part (14a, 24a) fixed to a respective wall (10, 20) of the bag (1) close to the mouth (5), and a lower part (14b, 24b) that is movable with respect to said wall (10, 20), the support webs (12, 22) being fixed to a respective wall (10, 20) by way of a respective extension web (14, 24) away from their upper edge (12a, 22a), such that the traction on the walls (10, 20) of the bag (1) when the complementary sections (3) are in contact causes the support webs (12, 22) to rotate about said complementary sections (3).