The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 16, 2012
Filed:
Sep. 04, 2009
Pete Ristola, Lammi, FI;
Jaakko Vilo, Turku, FI;
Jerzy Piotrowski, Warsaw, PL;
Raute Oyj, Nastola, FI;
Abstract
In a microwave heating apparatus, the fundamental TEmode of the standard waveguide () having a standard rectangular cross-section is fed into an elongated heating cavity () having an enlarged rectangular cross-section in which the shorter side of the standard waveguide is enlarged to a length which can accommodate the desired width of a board () to be heated. A pair of lateral slots () is provided parallel in the opposite enlarged walls () of the heating cavity () to form a track for the board () to travel across the cavity. As the initially longer sidewall () of the standard waveguide is unchanged, the fundamental mode is not affected but the electric field is uniformly distributed along the width of the board () traversing the electric field and the cavity. As a result, wider products can be heated and a more uniform heating pattern can be achieved.