Electric heating unit and method of producing same

Details Electric heating unit and method of producing same Electric heating unit and method of producing same

1996-06-20

1998-12-08

Walberg, Teresa J.

Electric heating

Heating devices

With heating unit structure

219213, 338275, 29611, H05B 100, H05B 344, H05B 300, H01C 1034

Patent

active

058473688

ABSTRACT:
An electric heating unit comprises a heat-insulating main body consisting primarily of a heat-insulating material and formed with a groove in a surface thereof, and a heating element provided in the groove and shaped in the form of waves with an amplitude greater than the width of the groove, the heating element having at widthwise opposite sides thereof bent portions extending into the main body from groove-defining opposite side walls thereof and thereby integrally supported by the main body. A bottom-forming member of refractory material made separately from the main body covers the bottom of the groove and is supported by the main body integrally therewith so that the surface of the member toward the opening of the groove is exposed from the main body. The heating element is disposed closer to the groove opening than the bottom-forming member and integrally supported by the main body so as to be in contact with portions of the surface of the member. The heating element is positioned within the groove and exposed outside the main body.

REFERENCES:
patent: 4292500 (1981-09-01), Semanaz et al.
patent: 4321459 (1982-03-01), Miyahara et al.
patent: 4617450 (1986-10-01), Boes et al.
patent: 4669181 (1987-06-01), Porzky
patent: 4719336 (1988-01-01), Sterward
patent: 5126535 (1992-06-01), Porzky
patent: 5278939 (1994-01-01), Boes et al.

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