Electric heater for thermal treatment furnace

Industrial electric heating furnaces – Resistance furnace device – With heating element detail

Reexamination Certificate

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Details

C373S127000

Reexamination Certificate

active

07003014

ABSTRACT:
A heating element (12) made of metal wire is installed at an internal circumferential surface of a cylindrical main thermal insulation body (11) of an electric heater according to the present invention. The heating element (12) comprises a plurality of resistance heat emitting portions (61)–(64) (71)–(74) (81)–(84) as segments along its length direction. The resistance heat emitting portions (61)–(64) (71)–(74) (81)–(84) are connected in parallel.

REFERENCES:
patent: 4346252 (1982-08-01), Walton et al.
patent: 4493089 (1985-01-01), Abell
patent: 5038019 (1991-08-01), McEntire et al.
patent: 5229576 (1993-07-01), Nakao et al.
patent: 5323484 (1994-06-01), Nakao et al.
patent: 5507639 (1996-04-01), Monoe
patent: 59-177890 (1984-10-01), None
patent: 10-50464 (1998-02-01), None
patent: 2001-267261 (2001-09-01), None

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