Electrical resistance heater

Details Electrical resistance heater Electrical resistance heater

1984-11-26

1987-04-07

Goldberg, E. A.

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219345, 219542, 219549, 338212, 338314, 338330, H05B 334

Patent

active

046563393

ABSTRACT:
The heater of the present invention includes a paper or plastic substrate on which is printed a semi-conductor pattern (typically a colloidal graphite ink) having (a) a pair of longitudinal stripes extending parallel to and spaced apart from each other and (b) a plurality of identical bars spaced apart from each other and extending between and electrically connected to the stripes. A metallic conductor (typically copper stripping) overlies each of the longitudinal stripes in face-to-face engagement therewith, and the conductors are held in tight engagement with the stripes by a sealing layer that overlies the metallic conductors and is sealed, at opposite sides of the semi-conductor stripe associated with the particular metallic conductor, to portions of the substrate that are free from the printed semi-conductor pattern.

REFERENCES:
patent: 2473183 (1949-06-01), Watson
patent: 2557983 (1951-06-01), Linder
patent: 3168617 (1965-02-01), Richter
patent: 3277419 (1966-10-01), Butz
patent: 3417229 (1968-12-01), Shomphe
patent: 3683361 (1972-08-01), Salzwedel
patent: 3798419 (1974-03-01), Maake
patent: 3878362 (1975-04-01), Stinger
patent: 4058704 (1977-11-01), Shimizu
patent: 4213028 (1980-07-01), Wolf
patent: 4485297 (1984-11-01), Grise et al.
patent: 4523085 (1985-06-01), Grise

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