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MICROWAVE HEATING APPARATUS

  • US 3,740,515 A
  • Filed: 07/07/1971
  • Issued: 06/19/1973
  • Est. Priority Date: 11/27/1970
  • Status: Expired due to Term
First Claim
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1. Microwave heating apparatus, comprising an open trough waveguide having side walls and a base, a ridge attached to a central region of the base between the side walls and extending longitudinally of the waveguide, the height of the ridge being substantially the same as the height of the side walls, and a metal member extending along and covering the whole length of the open side of the trough but spaced from the trough, said metal member forming a guide for passing one side of dielectric sheet adjacent the ridge with the metal member on the other side of the sheet, so that energisation of the waveguide will heat the sheet passed between the ridge and the metal member.

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