Waveguide Exposure Chamber for a Micrwave Energy Applicator
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United States of America Patent
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Issued Date -
Feb 18, 2016
app pub date -
Aug 14, 2015
filing date -
Aug 14, 2014
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Abstract
A microwave heating device for activating a microwave-activatable foam insulating material within the dual sidewalls of a beverage cup. The device has a waveguide that defines an exposure chamber for the articles. The waveguide has a plurality of 90-degree twisted rectangular sections, for rotating a perpendicular microwave field pattern along the length of the waveguide. A continuous flexible belt made of a dielectric material passes into and through the exposure chamber along a conveying path, and is formed and maintained into a curled shape in cross section through the exposure chamber to retain the untreated beverage cup upon the curled belt.
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