Resilient Valve Flap Closure for Pouch Vacuum Maintenance
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Solution Overview
Problem
Existing closure mechanisms for containers like pouches often fail to maintain a vacuum effectively, allowing air to enter and spoil perishables, and lack efficient air evacuation systems once sealed.
Innovation Solution
A closure mechanism featuring interlocking elements with a resilient valve flap that forms a releasable airtight seal, allowing air to escape when internal pressure exceeds a threshold, and includes a channel for fluid communication to maintain a vacuum within the pouch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a closure mechanism is sealed to maintain vacuum, then air entry is prevented, but air evacuation capability is lost
Solution Approach 1:
The valve flange is designed to be movable rather than fixed, allowing it to dynamically transition between a sealed position (maintaining vacuum) and an open position (allowing air evacuation). The flange can be actuated by pressure differential, manual operation, or other mechanisms to change the state of the aperture from closed to open as needed.
Solution Approach 2:
The aperture is pre-positioned in the closure mechanism structure, ready for air evacuation, but is initially blocked by the valve flange. This preliminary arrangement allows the system to maintain vacuum by default while having the capability to evacuate air when the flange is moved to the open position.
2Reliability
If a valve flange blocks the aperture to prevent air entry, then vacuum is maintained, but air escape is prevented when pressure builds up
Solution Approach 1:
The valve flange is designed to automatically respond to pressure changes within the pouch. When internal pressure exceeds external pressure by a certain differential, the flange is forced open to allow air escape, and when pressure equalizes or reverses, the flange returns to the sealed position. This self-actuating mechanism eliminates the need for external control systems.
Solution Approach 2:
The valve flange system provides pressure feedback control - the position of the flange is determined by the pressure differential across it. High pressure forces the flange open, low pressure allows it to seal, creating a feedback loop that automatically maintains pressure equilibrium and prevents over-pressurization.
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 mechanism effectively maintains a vacuum within the pouch by allowing air to escape when pressure exceeds a certain level, ensuring the freshness of contents for extended periods.
Implementation Method 1
A resilient valve flap covers the aperture and is attached to an exterior side of the flange. A channel is defined between the resilient valve flap and the flange that extends from the aperture to an edge of the resilient valve flap. The resilient valve flap is biased to form a releasable airtight seal against the exterior side of the flange across the channel.
Implementation Method 2
In response to higher relative pressure from within the pouch, the valve flange separates from the second base and allows air to escape through the aperture.
Data Source
AI summary
A closure mechanism for a pouch includes a first interlocking closure element and a second interlocking closure element. A first closure profile is disposed on an interior side of the first interlocking closure element. A flange extends from the first closure profile and has a first aperture disposed therethrough. A resilient valve flap covers the first aperture and is attached to an exterior side of the flange. The resilient valve flap includes a sealing member and an at least partially elastomeric latch attached between a distal end of the sealing member and the exterior side of the flange. A channel is defined between the resilient valve flap and the flange that extends from the first aperture to an edge of the resilient flap. The resilient valve flap is biased to form a releasable airtight seal against the exterior side of the flange across the channel.