Microwave Venting Container Lid with Flexible Button
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Solution Overview
Problem
Conventional microwavable food storage containers face issues with rapid temperature changes during microwaving, leading to pressure buildup, splattering, and poor produce respiration, while existing venting solutions are costly, complex, and prone to leakage or vacuum damage.
Innovation Solution
A reclosable lid with a flexible venting button that transitions between sealed and venting positions, allowing for effective air passage and accommodate produce respiration, manufactured using conventional thermoforming processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the container is left open during microwaving to vent pressure, then pressure buildup is prevented, but food splattering increases and sealed integrity is lost
Solution Approach 1:
The lid incorporates localized venting features (vents or channels) in specific regions rather than being completely open, allowing pressure to escape from designated areas while maintaining sealed engagement elsewhere to prevent food splattering
Solution Approach 2:
The venting structure acts as an intermediary element that mediates between the need to vent pressure and the need to maintain seal integrity, providing a controlled pathway for steam and pressure while keeping the majority of the lid-seal interface closed
2Stress or pressure
If conventional valves or openable doors are added to provide venting, then pressure venting capability is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The venting functionality is merged into the lid structure itself through integrally formed vents or channels, eliminating the need for separate valve mechanisms or moving parts while maintaining effective pressure venting capability
Solution Approach 2:
The complex valve mechanism with moving parts is extracted and replaced with a simpler fixed vent structure that achieves the same pressure relief function through geometric design rather than mechanical actuation
3Stress or pressure
If the lid is cracked open to vent during microwaving, then pressure is relieved, but produce respiration capability is reduced and leakage risk increases
Solution Approach 1:
The lid maintains sealed engagement across most of its perimeter while incorporating localized vent regions that provide controlled pressure relief, preserving overall seal integrity while enabling necessary venting function
Solution Approach 2:
The venting structure is designed to dynamically respond to pressure changes, opening or allowing flow when internal pressure exceeds external pressure during microwaving, while automatically closing or sealing when pressure equalizes, providing adaptive venting without user intervention
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 solution prevents splattering during microwaving, enhances produce freshness, and maintains the container's sealed integrity, reducing the risk of vacuum damage and manufacturing complexity.
Implementation Method 1
a flexible venting button that is adapted to transition from a first position to a second position upon application of an actuation force
Data Source
AI summary
A venting container including a lid and base having an inner cavity and a side wall that terminates in a rim, the lid including a central panel and a peripheral sealing lip that surrounds the panel, the peripheral sealing lip having a generally inverted U-shaped cross section that defines a lid channel into which the container rim fits, the sealing lip including at least one venting feature in the form of a flexible venting button that is adapted to transition from a first position to a second position upon application of an actuation force, the venting button being further adapted and positioned whereby when the container rim is positioned in the lid channel and the venting button is in the first position, sealed engagement of the lid to the container is effectuated and when the venting button is in the second position a venting air passage is provided from the container cavity to the container surroundings. In a second embodiment, the venting feature is in the form of a downwardly protruding venting boss provided to the lid closure and a boss seat formed in the base closure whereby the venting boss is received with the boss seat when the lid is oriented in a first non venting attachment position and the venting boss abuts against a surface of the base closure to provide a vent passage between the lid and base upon removal and repositioning of the lid to a second venting attachment position.