Food Pouch Pressure Closure Tapered Groove Design
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Solution Overview
Problem
Existing food bags require additional closure elements for sealing and have complex manufacturing processes, resulting in instability and difficulty in closing and handling.
Innovation Solution
A food bag design featuring a pressure closure with a strip-shaped plug-in element and a groove on the rear wall, where the groove has a taper and widening to securely hold the plug-in element, combined with a holding rail for improved grip and handling, made from silicone for enhanced durability and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional closure elements are used to ensure sealing, then sealing reliability is improved, but device complexity increases
Solution Approach 1:
The plug-in element and groove are integrated directly into the bag structure, merging the closure function with the bag body. The plug-in element is formed as part of the bag wall, eliminating the need for separate closure components while maintaining reliable sealing through the tapered groove design that provides automatic locking.
2Reliability
If complex closure mechanisms are implemented, then sealing performance is improved, but ease of operation deteriorates
Solution Approach 1:
Instead of requiring active locking mechanisms, the design uses a tapered groove that passively guides and secures the plug-in element. The taper provides automatic engagement and positioning, reversing the conventional approach where complex active mechanisms are needed for reliable sealing.
3Ease of manufacture
If film bags are used to reduce cost, then manufacturing cost is reduced, but stability deteriorates
Solution Approach 1:
The invention changes the geometric parameters of the closure system by introducing a tapered groove with specific angle and dimensions. This parameter optimization allows thin film material to provide sufficient structural stability and sealing force, enabling the use of cost-effective film bags while maintaining required stability.
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 simplifies closure and handling, provides a secure and airtight/watertight seal, and can withstand significant pressure without opening, while the holding rail stabilizes the bag and prevents unintentional opening.
Implementation Method 1
the plug-in element is held clamped on the taper in a closed position of the pressure closure
Implementation Method 2
When the pressure seal is closed, i.e., when the plug-in element is inserted into the groove and clamped against the groove walls, the bag can preferably withstand a pressure of 4000 to 8000 Pa
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A food pouch comprising a pouch body, the pouch body comprising a front wall (1) and a back wall (2) forming an interior space and enclosing a rim (3) around an opening. A press-to-close fastener (4) is arranged along the rim, comprising at least one strip-shaped insertion element (4a) extending along an inner surface of the front wall (1) and a groove (4b) into which the insertion element (4a) can be inserted, the groove extending along an inner surface of the back wall (2). The groove (4b) is designed to have a base and two walls, the latter having a taper and a widening, such that the width of the groove in the taper region perpendicular to the insertion direction of the insertion element (4a) is narrower than the width of the groove in the widening region perpendicular to the insertion direction of the insertion element (4a).The width of the expansion is greater than the width of the plug element (4a) perpendicular to the insertion direction of the plug element (4a) and the plug element (4a) is held clamped against the tapered section in a closed position of the pressure closure (4).