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US 5,220,142 AGranted
Uniform microwave heating
AssigneeInternational Business Machines Corporation
InventorsSusan J. LaMaire, David A. Lewis
Life of this patent
Estimating the term…
Abstract
A control element positioned between an object being heated and a source of microwave radiation is employed to prevent a localized concentration of microwave energy resulting from a discontinuity in the object surface. Close control is provided for heating an object with a sensitive coating.
Claims14
In microwave heating apparatus,
- said apparatus including a cavity for enclosing a workpiece object,
- said cavity having a border through which radiation from a source produces a microwave field in said cavity,
- an improvement comprising:
- a microwave responsive workpiece having a surface positioned in said cavity within said border, and,
- an energy concentration control element for prevention of locallized heating in a region of said surface of said workpiece,
- said energy concentration control element being interposed in said cavity between at least a portion of said surface of said workpiece and said border of said cavity,
- said energy concentration control element being of microwave transparent material.
4 more elements
In microwave heating apparatus of a type wherein a microwave responsive object is subjected to a microwave energy field within a border, an improvement for prevention of localized heating comprising:
- an element positioned between said object and said border at least at each surface discontinuity of said object,
- said element being of essentially microwave transparent material, and surrounding said object.
Dependencies are inferred from the claim text.