Microwave Heating Platform Venting for Crisp, Even Browning

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Solution Overview

Problem

Microwave ovens tend to cook food items unevenly and fail to achieve a balanced heating with a browned, crisp crust, particularly for bread and dough-based products like pizzas and pastries.

Innovation Solution

A microwave heating construct with a planar platform and venting features that elevate the food item, incorporating microwave energy interactive materials such as susceptors and energy directing elements to enhance browning and crisping, while allowing moisture to be carried away, thereby improving heating uniformity and crust formation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If microwave ovens are used to heat food items, then heating convenience is improved, but heating uniformity and crust quality deteriorate

Engineering Contradiction:
Improveheating convenienceVSAvoidheating uniformity
Core Design Contradiction:
Ease of operationVSManufacturing precision

Solution Approach 1:

A construct comprising a platform and venting features is introduced as an intermediary between the microwave oven and the food item. The venting features elevate portions of the platform to create air gaps that facilitate moisture removal, while the platform provides a stable base for the food item, thereby improving heating uniformity and crust quality without sacrificing convenience

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The construct incorporates venting features with aperture structures that function as porous pathways. These apertures allow moisture vapor to escape from beneath the food item during microwave heating, preventing sogginess and enabling crust formation while maintaining the convenience of microwave operation

Inventive Principle:
Principle #31Porous materials

2Speed

If microwave ovens are used to heat food items, then heating speed is improved, but crust browning and crisping deteriorate

Engineering Contradiction:
Improveheating speedVSAvoidcrust temperature
Core Design Contradiction:
SpeedVSTemperature

Solution Approach 1:

The venting features extract moisture vapor from the heating environment by providing escape pathways through their aperture structures. This moisture removal enables higher crust temperatures to be achieved during microwave heating, facilitating browning and crisping reactions while maintaining rapid heating speeds

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The venting features create a three-dimensional heating environment by elevating portions of the platform to form air gaps. This dimensional change allows moisture to be removed from beneath the food item while maintaining direct microwave energy contact with the food surface, enabling simultaneous rapid heating and crust development

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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 construct ensures more even heating and effective browning/crisping of food items by directing microwave energy and removing moisture, resulting in a better cooking outcome in both microwave and conventional ovens.

Implementation Method 1

The venting features allow for moisture to be carried away from the food item

Methodology Applied
Scientific EffectEvaporation: Evaporation

Implementation Method 2

moisture to be carried away from the food item

Methodology Applied
Scientific EffectConvection: Convection

Implementation Method 3

the construct may include a susceptor for browning and/or crisping the food item

Methodology Applied
Scientific EffectMicrowave heating: Dielectric Heating

Implementation Method 4

microwave energy interactive material configured as one or more microwave energy interactive elements

Methodology Applied
Scientific EffectMicrowave energy interaction: Electromagnetic Induction

Data Source

PatentUS8963061B2Microwave heating construct with venting features
Publication Date: 2015.02.24 GRAPHIC PACKAGING INTERNATIONAL LLC
  • US8963061B2 patent drawing
  • US8963061B2 patent drawing
  • US8963061B2 patent drawing

AI summary

A microwave heating construct has a platform including microwave energy interactive material and a plurality of venting features. The venting features include a plurality of tabs that are urged out of the plane of the platform to define an aperture. The tabs are disposed beneath the platform to define a void in communication with the aperture.