Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1975-09-19
1977-08-02
Mayewsky, Volodymyr Y.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
126 21A, 126273R, 219400, 219386, A21B 122, F27D 1102
Patent
active
040397769
ABSTRACT:
An apparatus and method for holding food and the like at desired temperature and moisture levels for an extended period of time wherein there is provided a relatively still volume of air about the food which is heated by maintaining a regulated, temperature controlled, recirculating flow of heated air in a closed passage with the air heated by a controlled heating element and recirculated by controlled air blowers about said volume of air along at least two pairs of perpendicular axes and about a major portion of the external surface area of the volume of air without a direct contact of heated air flow with the food to provide substantially uniform heating by conduction and convection. A controllable source of moisture in the form of a water pan in open communication with the heated volume of air introduces controlled quantities of moisture into the heated volume of air. A control circuit regulates electric power to the heating element and blowers and includes an adjustable thermostat to vary the temperature range of the volume of air, a thermostat to maintain the blower on when the heating element is de-energized until the heated air cools, and a thermostat to de-energize the heating element in the event of excessive temperatures.
REFERENCES:
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patent: 3518949 (1970-07-01), Stock
patent: 3868941 (1975-03-01), Roderick
patent: 3886346 (1975-05-01), Meyers
patent: 3911242 (1975-10-01), Buday et al.
Lewis, Jr. Ancel W.
Mayewsky Volodymyr Y.
National Equipment Corporation
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