H - Electricity – 01 – P
Patent
H - Electricity
01
P
H01P 3/12 (2006.01) B27N 3/00 (2006.01) H01P 1/24 (2006.01)
Patent
CA 2678270
In a microwave heating apparatus, the fundamental TE 10 mode of the standard waveguide (5) having a standard rectangular cross-section is fed into an elongated heating cavity (2) 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 (8) to be heated. A pair of lateral slots (25) is provided parallel in the opposite enlarged walls (11) of the heating cavity (2) to form a track for the board (8) to travel across the cavity. As the initially longer sidewall (11) 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 (8) traversing the electric field and the cavity. As a result, wider products can be heated and a more uniform heating pattern can be achieved.
Piotrowski Jerzy
Ristola Pete
Vilo Jaakko
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Raute Oyj
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