Zipper Profile Stabilizer for Leak-Resistant Bag Closures
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Plastic bags with zipper-type closures often leak when subjected to forces that cause liquids to bear against the closures.
Innovation Solution
A zipper profile design featuring a male and female closure member with a stabilizer that limits deflection of the closure members, preventing them from splaying apart and ensuring a secure seal, even under pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a zipper-type closure is used to close the bag opening, then the bag can be repeatedly opened and closed, but the closure members may deflect and splay apart under liquid pressure, causing leakage
Solution Approach 1:
The closure system is divided into multiple functional components: a male closure member with protrusion, a female closure member with recess, and a stabilizer element. This segmentation allows each component to perform its specific function - the male and female members provide the opening/closing mechanism while the stabilizer prevents deflection under pressure, resolving the contradiction between operability and leak resistance.
Solution Approach 2:
The stabilizer acts as an intermediary element between the closure members and the bag body. It provides structural support and limits deflection of the closure members under liquid pressure, preventing the splaying apart that causes leakage while allowing the closure to remain operable.
2Reliability
If the closure members are made taller to improve sealing, then leak resistance improves, but the device complexity and material usage increase
Solution Approach 1:
Instead of making the closure members taller and more complex, the solution segments the function into two parts: the closure members themselves (maintaining simple geometry for easy manufacturing) and a separate stabilizer element (which provides the necessary structural support). This segmentation achieves leak resistance without increasing closure member complexity.
Solution Approach 2:
The stabilizer serves as an intermediary structural element that provides the necessary support to prevent deflection and splaying. This allows the closure members to remain simple in design while still achieving reliable leak resistance through the stabilizing action of the separate element.
Data Source
AI summary
A bag for containing at least one of liquid and solid items therein. The bag has releasable closures for opening and closing the bag. The closures are constructed to resist leakage from the bag.