Heating – Work chamber having heating means – Having means by which work is progressed or moved mechanically
Patent
1989-05-30
1991-01-22
Bennet, Henry A.
Heating
Work chamber having heating means
Having means by which work is progressed or moved mechanically
432139, F27B 902
Patent
active
049867504
ABSTRACT:
Disclosed is a furnace in which the inside of the furnace is enclosed by a furnace wall having an inner surface lined with a heat insulating material. Heaters for heating an inside of the upper furnace chamber to a predetermined temperature, and an upper turntable supported so as to be rotatable horizontally and arranged to mount works on an upper surface thereof are provided in the upper furnace chamber. Other heaters for heating the inside of a lower furnace chamber to a predetermined temperature, and a lower turntable supported so as to be rotatable horizontally independently of the upper turntable and arranged to mount works on an upper surface thereof are provided in the lower furnace chamber. Delivery of a work from/to the outside of the furnace to/from each of the upper and lower turntables is performed by insertion of a fork through an opening formed in a predetermined position of the furnace wall. In this structure, for example, carburizing treatment on a work is carried out in the upper furnace chamber and diffusion treatment on a work is carried out in the lower furnace chamber.
REFERENCES:
patent: 939880 (1909-11-01), Wedge
patent: 1836002 (1931-12-01), Balz
patent: 1979312 (1934-11-01), Burns
patent: 2013975 (1935-09-01), Thomas
patent: 4702694 (1987-10-01), Johnson et al.
Bennet Henry A.
Furnace Juko Kabushiki Kaisha
Gromada Denise L. F.
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