Microwave Heating Construct With Locating Features for Contoured Foods

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Solution Overview

Problem

Existing food preparation methods, particularly in microwave ovens, fail to effectively heat, brown, and crisp food products with contoured or irregular surfaces, leading to uneven cooking and reduced browning due to inefficient energy distribution and heat loss.

Innovation Solution

The development of constructs with contoured platforms and locating features that accommodate irregular food surfaces, incorporating microwave interactive elements like susceptor films to enhance heating and venting, which include raised portions for closer energy proximity and venting channels to manage moisture, ensuring uniform browning and crisping.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional flat heating surfaces are used, then the structure is simple, but heating efficiency is poor for contoured food surfaces

Engineering Contradiction:

Improveheating efficiencyVSAvoidconstruct structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The heating construct employs contoured and curved surfaces including domed sections and recesses that match the curvature of contoured food products. This allows the microwave susceptor elements to follow the food surface contours, improving energy transfer efficiency across the entire food surface including raised and recessed areas.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The construct adds vertical dimensionality with elevated platforms and domed sections that lift portions of the food product closer to the microwave source. This three-dimensional configuration enables better energy distribution across contoured surfaces compared to conventional flat two-dimensional heating surfaces.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Temperature

If microwave energy is directed closer to food surface, then browning and crisping improve, but heat loss increases

Engineering Contradiction:

Improvesurface temperature for browningVSAvoidheat loss

Core Design Contradiction:

TemperatureVSLoss of energy

Solution Approach 1:

The construct incorporates susceptor elements with varying properties in different locations - some areas have direct microwave transmission for browning, while other areas use reflective or absorptive materials to redirect energy. The contoured surfaces create localized zones with different thermal characteristics to optimize both browning and energy efficiency.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The construct uses susceptor materials as intermediaries that absorb microwave energy and convert it to thermal energy, which then transfers to the food product. This intermediary mechanism allows controlled energy transfer, improving surface heating for browning while the overall system design manages total energy loss through reflective and insulating features.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Manufacturing precision

If contoured platforms are used to accommodate irregular food surfaces, then heating uniformity improves, but manufacturing complexity increases

Engineering Contradiction:

Improveheating uniformityVSAvoidconstruct fabrication

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The construct is divided into multiple separable components including base sections, elevated platforms, and removable susceptor elements. This segmentation allows each component to be manufactured separately using standard techniques, then assembled to form the complex contoured structure, reducing overall manufacturing difficulty while maintaining heating uniformity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The contoured construct design serves multiple functions: it provides structural support, creates optimal microwave energy distribution patterns, accommodates various food shapes and sizes, and facilitates moisture drainage. This multi-functionality justifies the increased manufacturing complexity by delivering superior heating uniformity and versatility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 enables efficient heating, browning, and crisping of food products with contoured surfaces by directing microwave energy closer to the food and managing moisture, resulting in improved cooking outcomes with visually appealing grill marks and reduced heat loss.

Implementation Method 1

incorporating microwave interactive elements like susceptor films to enhance heating

Methodology Applied

Scientific EffectMicrowave radiation absorption and conversion to heat: Dielectric Heating

Implementation Method 2

venting channels to manage moisture

Methodology Applied

Scientific EffectEvaporation: Evaporation

Data Source

PatentUS8395101B2Construct with locating feature

Publication Date: 2013.03.12 GRAPHIC PACKAGING INTERNATIONAL LLC

AI summary

A construct for heating a food product. The construct comprises a first centerline extending in a first direction and a second centerline extending in a second direction, wherein the first centerline is substantially perpendicular to the second centerline, a base, a pair of opposed platforms extending upwardly from the base. The pair of opposed platforms are separated by a recess extending in the second direction. The construct comprises at least one locating feature foldably connected to the construct and being located between the opposed platforms for locating a food product on one of the opposed platforms.