Electric furnace

Details Electric furnace Electric furnace

1990-07-30

1991-11-12

Walberg, Teresa J.

Electric heating

Heating devices

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

F27B 514, F27D 1100

Patent

active

050649965

ABSTRACT:
An electric furnace wherein a belt-like heating member in the shape of zigzag or wave is wound helically on the inner surface of a cylindrical heat insulating member and portions of the inner surface of the belt-like heating member are covered with portions of the heat insulating member, so that the heating member is held securely by the heat insulating member.

REFERENCES:
patent: 4207672 (1980-06-01), Wohlert
patent: 4575619 (1986-03-01), Porzky
patent: 4596922 (1986-06-01), Erickson

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