Venting Closure Mechanism for Flexible Pouches
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Solution Overview
Problem
Existing closure mechanisms for flexible pouches do not effectively manage gas pressure and resealability, leading to inefficiencies in gas expulsion and potential re-entry of external gases.
Innovation Solution
A resealable closure mechanism with interlocking profiles and sealing flaps that include exhaust channels, allowing gas to escape while maintaining a gastight seal, and a textured surface for enhanced flow channels to facilitate gas expulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a closure mechanism seals the pouch opening, then gas cannot enter the pouch, but gas pressure builds up inside the pouch
Solution Approach 1:
The closure mechanism is divided into multiple functional components: sealing elements for gas tight sealing and venting elements for gas expulsion. The sealing elements include first and second sealing surfaces that can engage to prevent gas entry, while venting elements include vent channels and a movable vent closure that can open to release built-up gas pressure. This segmentation allows the mechanism to simultaneously provide reliable sealing and pressure relief.
Solution Approach 2:
The closure mechanism incorporates movable components including a movable vent closure that can shift between closed and open positions, and a movable sealing element that can engage and disengage from sealing surfaces. These dynamic components allow the mechanism to transition between sealed and vented states, enabling it to maintain sealing effectiveness while accommodating gas pressure changes through controlled opening of vent channels.
2Stress or pressure
If a closure mechanism allows gas to escape, then gas pressure is reduced, but gas may re-enter the pouch
Solution Approach 1:
The movable vent closure acts as an intermediary element between the vent channels and the external environment. When the vent closure is in the closed position, it maintains the sealing effectiveness and prevents gas re-entry. When gas pressure builds up, the vent closure moves to open the vent channels, allowing controlled gas escape. This intermediary component ensures that the system can switch between sealing and venting modes reliably, preventing gas re-entry while maintaining sealing effectiveness.
3Ease of operation
If a closure mechanism is designed for repeated sealing and unsealing, then usability is improved, but the complexity of the mechanism increases
Solution Approach 1:
The closure mechanism merges multiple functions into integrated components. The sealing elements and venting elements are combined in a single closure assembly, with the movable vent closure serving both as a seal when closed and as a vent when open. This merging reduces the number of separate components needed for repeated sealing and unsealing operations, thereby improving ease of operation while managing the complexity through functional integration.
4Reliability
If a closure mechanism includes multiple sealing surfaces and vent channels, then gas management is improved, but the manufacturing complexity increases
Solution Approach 1:
The closure mechanism utilizes flexible sealing elements and thin film structures that can be formed into complex geometries through molding or forming processes. The sealing surfaces and vent channels are integrated into these flexible components, allowing multi-functional features to be created in a single manufacturing step. This approach improves gas management effectiveness through reliable sealing and venting while reducing manufacturing complexity by consolidating features into formable components rather than requiring assembly of multiple rigid parts.
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 efficiently expels gas from the pouch while preventing re-entry, ensuring effective sealing and efficient use of storage space.
Implementation Method 1
an interior surface of the pouch sidewall facing the first exhaust channel is textured with a flow channel between the interior and the first exhaust channel
Implementation Method 2
the sealing flap engages the interior surface of the second base to form a releasable gastight seal extending the length of the mouth and to allow gas flow only from the interior toward the exterior
Implementation Method 3
the first and second closure profiles interlock to form a seal extending the length of the mouth
Data Source
AI summary
A venting closure mechanism for a pouch includes first and second closure profiles that interlock and third and fourth closure profiles that interlock. A sealing flap extends from the first closure element between the first and third closure profiles and engages the second closure element to form a releasable gastight seal therebetween. When the first and second closure elements are occluded, a first plurality of longitudinally spaced first exhaust channels is disposed on a product-side of the sealing flap and a second plurality of longitudinally spaced second exhaust channels is disposed on a user-side of the sealing flap. A first pouch sidewall is attached to the first closure element at an exterior surface thereof between a user-side edge of the first closure element and the sealing flap. An interior surface of the first pouch sidewall is textured with a pattern that provides flow channels therealong.