Furnace for heat treatment of dental products in an inert atmosp

Details Furnace for heat treatment of dental products in an inert atmosp Furnace for heat treatment of dental products in an inert atmosp

1993-03-05

1995-07-11

Reynolds, Bruce A.

Electric heating

Heating devices

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

219402, 373109, 118725, 432121, F27B 514

Patent

active

054323193

ABSTRACT:
A high temperature furnace for heat treatment of various products, and for sintering. One of the uses is for preparing dental products such as dental crowns, bridges, implants and the like. The main component of the furnace is a cup-shaped quartz vessel, with a curved roof section, and which has a wide flange at its open end. There is provided a heating coil, applied to the vessel, and heat insulating means and heat measuring means indicating the temperature inside the vessel. There is provided a tube leading to the outside which can be used for establishing a vacuum in the vessel or for providing in the vessel or for providing in the vessel an atmosphere of any desired gas or gas mixture. There is provided a base through which there can be raised and lowered a worktable. The flange of the vessel rests on O-rings which provide a hermetic seal, and which are not subjected to an excessive temperature due to the width to the width of the flange of the vessel. There is provided an efficient thermal insulation and means for highly accurate heating of the vessel.

REFERENCES:
patent: 4412812 (1983-11-01), Sadowski et al.
patent: 4753192 (1988-06-01), Goldsmith et al.
patent: 4760244 (1988-07-01), Hokynar
patent: 4828490 (1989-05-01), Indig
patent: 4954685 (1990-09-01), Kumagai et al.
patent: 5131842 (1992-07-01), Miyazaki et al.
patent: 5163416 (1992-11-01), Schultz et al.

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