Heating – Work chamber having heating means – Having means by which work is progressed or moved mechanically
Patent
1989-07-07
1990-06-12
Yuen, Henry C.
Heating
Work chamber having heating means
Having means by which work is progressed or moved mechanically
432236, 432237, 432 77, F27B 920
Patent
active
049328646
ABSTRACT:
A roller hearth type heat treating furnace has a furnace housing, the inside of which is partitioned into first, second and third treating chambers by a plurality of heat insulating intermediate doors. In order to independently control the temperature inside each treating chamber, the first treating chamber is provided with radiant tubes, the second treating chamber with radiant tubes and a cooler with a fan and the third treating chamber with electro tubes and cooling tubes. The furnace accommodates a series of hearth rollers which can be selectively driven by a plurality of electric motors and a plurality of clutches so that a material located in one chamber may be transported into the adjoining chamber only or successively transported within the furnace.
REFERENCES:
patent: 3778221 (1973-12-01), Bloom
patent: 4193761 (1980-03-01), Mantegani
patent: 4397451 (1983-08-01), Kinoshita et al.
patent: 4586898 (1986-05-01), Orbeck
patent: 4596527 (1986-06-01), Yamada et al.
patent: 4627814 (1986-12-01), Hattori et al.
patent: 4775316 (1988-10-01), Zelaschi
Chugai Ro Co. Ltd.
Yuen Henry C.
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