Bag Body Tearing Guide and Protector for Sealable Packaging
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Solution Overview
Problem
The existing bag designs for packaging medicine and food with zipper tapes and pull-out plugs suffer from insufficient sealability due to holes provided for the pull-out plug and thread, which compromise the bag's ability to maintain a sealed environment.
Innovation Solution
A bag design featuring a tearing guide piece and a belt-shaped base with a tab that includes a cutting line and a protector, allowing the tearing guide piece to rip the bag along a longitudinal direction when pulled, while maintaining sealability by preventing the interior from communicating with the exterior until unsealed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If holes are provided in the front wall to form a pull-out plug or to expose a thread end, then the bag can be opened or unsealed, but the sealability of the bag becomes insufficient
Solution Approach 1:
The front wall is divided into multiple sealed packages (first package, second package, etc.), each containing a thread end. The cutting line segments the front wall structure, allowing one package to be opened while others remain sealed, maintaining overall sealability while enabling access to specific contents.
Solution Approach 2:
The cutting line is positioned to cut only the belt-shaped base and not penetrate through the film, creating a localized opening structure. This allows the tab to be pulled and the tearing guide piece to rip the film along a controlled path, providing opening functionality at a specific location while preserving the sealability of the rest of the bag structure.
2Ease of operation
If a cutting line penetrating through the belt-shaped base and first face portion is provided to form a tab, then the tab can be pinched and pulled to open the bag, but the interior of the bag may communicate with the exterior compromising sealability
Solution Approach 1:
The cutting line cuts the belt-shaped base excessively beyond what would be needed for a simple opening, creating a tab structure that extends beyond the cutting line. This excessive cutting action allows the tab to be easily pinched and pulled, while the tearing guide piece controls the rip path to maintain sealability of the remaining packages.
Solution Approach 2:
The tearing guide piece acts as an intermediary element between the pulled tab and the film structure. When the tab is pulled, the tearing guide piece guides the rip along a controlled path through the film, ensuring that the opening occurs in a predictable manner that maintains the sealability of other packages while enabling access to the first package.
Data Source
AI summary
A bag includes a bag body defining a housing space, an elongated member provided on a first face portion of two face portions forming the bag body, and a tab. The elongated member includes an elongated tearing guide piece, a belt-shaped base provided between a second face portion and the tearing guide piece along a longitudinal direction of the tearing guide piece. The tab has an outer edge defined in the first face portion by a cutting line penetrating through the belt-shaped base and the first face portion. A protector covering the tab is provided on a side of the first face portion provided with the belt-shaped base.