Electric heating – Metal heating – Of cylinders
Patent
1989-06-06
1991-03-12
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1055B, 219 1055E, 219389, 99451, 99325, 392407, H05B 680
Patent
active
049994689
ABSTRACT:
The present invention is drawn to a combination microwave/infrared oven heating a box-like structure in which a plurality of chambers are defined. A microwave heating source is associated with at least one of the chambers for generating microwaves therein, an infrared short-wave radiation source is associated with at least another one of the chambers for generating short-wave infrared radiation therein, and a medium-wave infrared radiation source is associated with at least yet another one of the chambers for generating medium-wave infrared radiation therein. A rotary conveyor is rotatably supported in the oven within the box-like structure and conveys foodstuffs in the oven successively through the chambers. An electronic circuit including a central logic system controls the operation of the rotary conveyor to set the time periods during the foodstuffs conveyed in the oven remain in respective ones of the chambers. The central logic system may also control the operation of the microwave heating source, the short-wave infrared radiation source and the medium-wave infrared radiation source.
REFERENCES:
patent: 3541289 (1970-11-01), Smith
patent: 3699899 (1972-10-01), Schiffmann et al.
patent: 3700051 (1987-10-01), Goessler et al.
patent: 3881403 (1975-05-01), Ingram et al.
patent: 4039796 (1977-08-01), Leibin et al.
patent: 4477706 (1984-10-01), Mittelsteadt
patent: 4687895 (1987-08-01), Chitre et al.
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