Title:
RF ENERGY CONVEYOR OVEN
Document Type and Number:
WIPO Patent Application WO2002045516
Kind Code:
A3
Abstract:
RF energy provided by electrodes (15,20a,20b) positioned between a product (34) in a conveyor oven (10) is used to heat a product (34) that exhibits a variable impedance during the heating process. As the product's impedance changes during the heating process, RF heating system impedance can be maintained constant by adjusting the distance between the electrodes (15,20a20b), adjusting the impedance of a variable impedance device (24a,24b) connected between the RF power source (22a,22b,22c,22d) and an electrode (15,20a,20b), or a combination of electrode distance adjustment and impedance adjustment of the variable impedance device (24a,24b). The system is particularly applicable to the heating or pasteurization of bulk food products (34) with multiple heating zones.
Inventors:
OTTAWY STEVEN THOMAS (GB)
Application Number:
PCT/US2001/046644
Publication Date:
September 19, 2002
Filing Date:
December 05, 2001
Export Citation:
Assignee:
COMDEL INC (US)
OTTAWY STEVEN THOMAS (GB)
OTTAWY STEVEN THOMAS (GB)
International Classes:
A21B2/00; A23L3/005; A23L3/01; A23L3/12; A23L3/18; F24C7/00; F27D11/00; H05B6/50; H05B6/60; H05B11/00; (IPC1-7): H05B6/50; H05B6/60
Foreign References:
| US4974503A | 1990-12-04 | |||
| US4221950A | 1980-09-09 | |||
| US2546004A | 1951-03-20 | |||
| US4257167A | 1981-03-24 | |||
| US4567340A | 1986-01-28 | |||
| US2512311A | 1950-06-20 | |||
| US5942146A | 1999-08-24 |
Other References:
See also references of EP 1340409A4
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