Zipper Tape Bag Structure for Tamper-Resistant Closure
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Solution Overview
Problem
Existing zipper tape-equipped bags lack effective tamper resistance due to complex shapes that are difficult to manufacture and engageable hooks that can be easily opened, leading to potential tampering of contents.
Innovation Solution
A zipper tape design with a pair of belt-shaped bases, where one base is bonded at both ends near the aperture and housing space, and the other is bonded only at the housing space end, ensuring secure engagement and preventing easy opening by shearing the engagement portion when attempted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a zipper tape with engageable male and female members is used to enable easy opening and closing operations, then the ease of operation is improved, but the tamper resistance deteriorates because the article can be easily taken out from the once sealed bag body
Solution Approach 1:
The invention divides the zipper tape into two separate tapes (first zipper tape and second zipper tape) with different functions. The first zipper tape engages to close the bag, while the second zipper tape remains disengaged and can be pulled to open the bag. This segmentation allows the bag to be easily closed while preventing easy opening, thereby resolving the contradiction between ease of operation and tamper resistance.
Solution Approach 2:
The invention inverts the conventional zipper mechanism by making the first zipper tape engageable (for closing) and the second zipper tape disengageable (for opening). Instead of both tapes being fully engageable for closing, one tape is designed to remain disengaged, allowing opening only by pulling the second tape. This inversion resolves the contradiction by enabling easy closing while preventing unauthorized opening.
2Reliability
If belt-shaped engaging members with complex shapes are used to achieve tamper resistance, then the tamper resistance is improved, but the device complexity increases making manufacture difficult
Solution Approach 1:
The invention segments the zipper tape into two simpler tapes rather than using one complex engaged tape. Each tape has a simpler structure that is easier to manufacture, while the segmentation itself provides the tamper resistance function. This resolves the contradiction by reducing individual component complexity while maintaining overall security functionality.
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
The design enhances tamper resistance by preventing engagement release and facilitating easy closure without heat sealing, making it difficult to open the bag once contents are housed.
Implementation Method 1
the first belt-shaped base is bonded to the bag body at least at a first end near the aperture of the bag body and a second end near the housing space of the bag body
Implementation Method 2
an engagement portion including a pair of a male hook and a female hook engageable with each other
Implementation Method 3
the second belt-shaped base is bonded to the bag body at a second end near the housing space of the bag body without being bonded to the bag body at a first end near the aperture of the bag body
Data Source
AI summary
A female belt-shaped base is attached to a bag body at a region from a female hook to a first end near an open end of the bag body and to a second end near a housing space. A male belt-shaped base is attached to the bag body only in a bonding region without being attached at a region from a position where an engagement portion is continuously attached to a first end near the open end of the bag body.