Heating element conveniently formed from flat blank

Details Heating element conveniently formed from flat blank Heating element conveniently formed from flat blank

1989-08-24

1991-07-23

Reynolds, Bruce A.

Electrical resistors

Zigzag or sinuous resistance element

Element includes integral stiffening structure

338283, 338288, 338293, 338206, 338 58, 219552, 392360, H05B 310

Patent

active

050347217

ABSTRACT:
The invention relates to a method of manufacturing a heating element from a flat metal foil blank in which strips (1) are formed whose ends (2) are interconnected by connecting portions (3, 4) with alternate connecting portions disposed at opposite ends of the strips so as to form a meandering pattern and to a heating appliance incorporating such a heating element. In order to make such a foil heating element suitable for use in appliances in which an air stream to be heated passes over the foil heating element the connecting portions (3, 4) are bent in such a way that the strips (1) are tilted out of the plane of the foil blank. Preferably the strips are disposed an an angle .alpha. between 45.degree. and 90.degree. relative to the plane.

REFERENCES:
patent: 1233183 (1917-07-01), Carter et al.
patent: 2102302 (1937-12-01), Arnold
patent: 4066865 (1978-01-01), Godel et al.
patent: 4553126 (1985-11-01), Brandstatter et al.

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