Light-radiant furnace

Details Light-radiant furnace Light-radiant furnace

1983-08-29

1985-04-02

Envall, Jr., Roy N.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219405, 219411, 118724, F27B 906, H05B 102

Patent

active

045089604

ABSTRACT:
Disclosed herein is a method for operating a light-radiant furnace equipped with incandescent lamps as the light-radiant source thereof. The method includes a step of transporting a plurality of objects successively into the light-radiant furnace and controlling the operation of the incandescent lamps in synchronization with the transportation of each of the objects into the light-radiant furnace and in accordance with a predetermined operation curve so as to expose the object to light for their heating. The method features feeding a small current to the incandescent lamps so as to dim the incandescent lamps prior to each operation of the incandescent lamps in accordance with the operation curve. According to the above method, a heat treatment of object can be repeatedly carried out always under the same conditions while enjoying rated long service life of incandescent lamps without increasing the electric power to be wasted by the incandescent lamps.

REFERENCES:
patent: 4180721 (1979-12-01), Watanabe
patent: 4221956 (1980-09-01), Fielding
patent: 4400612 (1983-08-01), Lee

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