Insulated atmosphere furnace

Details Insulated atmosphere furnace Insulated atmosphere furnace

1983-01-07

1984-11-13

Camby, J.

Heating

Work chamber having heating means

Means supplying a protective or treating agent other than or...

432 23, 432 26, 432252, F27B 504, F27B 904, F27B 322, F27D 114

Patent

active

044823169

ABSTRACT:
A heat treat furnace wherein the furnace top and side walls are each defined by an outer, gas-tight metallic structural wall, an intermediate perforate metal plate generally parallel to and coextensive with the exterior wall to define a plenum chamber therebetween, and an inner layer of non-metallic, gas permeable insulation, preferably a blanket insulation of appreciable thickness. The gaseous atmosphere of the furnace is injected into the plenum chambers defined between the exterior walls and the perforate plates, and the atmosphere passes through the insulation layer into the interior of the furnace. The inward flow of atmospheric gas (1) replenishes the atmosphere in the furnace, (2) preheats the atmosphere, and (3) reduces any heat loss through the wall structure.

REFERENCES:
patent: 2246322 (1941-06-01), Roth
patent: 2828813 (1958-04-01), Holden
patent: 4244686 (1981-01-01), Scott, Jr.

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