Tunnel heater

Details Tunnel heater Tunnel heater

1984-05-02

1986-03-18

Lyddane, William E.

Foods and beverages: apparatus

Cooking

With conveyor or movably supported

99476, 99477, 126 21A, 126 39D, A23L 300, A21B 100

Patent

active

045760900

ABSTRACT:
An improved apparatus and method for heating food products by forced air convection are disclosed. The apparatus comprises a tunnel heater having a tunnel-like cavity through which food products to be heated are conveyed. Air is drawn from within the tunnel cavity by a circulating blower arrangement, with air flow directed against the food products through upper and lower foraminous plates disposed above and below and adjacent to the tunnel cavity. Aerodynamically efficient ducting of the circulating air is provided by scroll-shaped passages positioned in association with the blower arrangement, and venturi-like passages positioned upstream of the foraminous upper and lower plates. A conveyor is provided for automatically advancing food products through the tunnel cavity. Air curtains are provided at either end of conveyor to isolate the cavity so that heating of the food products takes place in an efficient and controlled manner.

REFERENCES:
patent: 3908533 (1975-09-01), Fagerstrom
patent: 4252055 (1981-02-01), Johansson
patent: 4471750 (1984-09-01), Burtea

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