High efficiency free expansion foil heating element

Details High efficiency free expansion foil heating element High efficiency free expansion foil heating element

1977-04-04

1979-04-17

Truhe, J. V.

Electric heating

Heating devices

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

338307, 338308, 338314, 219463, 219464, 219543, 219544, H05B 368

Patent

active

041502809

ABSTRACT:
A flat plate surface heating unit or cooktop having a solid utensil-supporting plate that is heated by a resistive foil heating element that is bonded to a flexible, ceramic fiber paper substrate by a high temperature inorganic cement of high thermal conductivity and high electrical resistivity. The cement is formed in an electrically insulating layer that overlies the foil, and this cement hardens before the cement surface is applied against the underside of the cover plate so that the cement is not bonded to the cover plate. The soft, fibrous nature of the ceramic fiber paper substrate allows free expansion of the foil during thermal cycling. The relatively high thermal conductivity layer provides good heat transfer from the foil heating element to the utensil-supporting plate for improved efficiency.

REFERENCES:
patent: 2152126 (1939-03-01), Young
patent: 3067315 (1962-12-01), Hurko
patent: 3086101 (1963-04-01), Scofield
patent: 3591753 (1971-07-01), Gartner
patent: 3733462 (1973-05-01), Bouchard et al.
patent: 3805024 (1974-04-01), Joeckel et al.
patent: 3845273 (1974-10-01), Hurko
patent: 3869596 (1975-03-01), Howie
patent: 3968281 (1976-07-01), Erikson
patent: 4032750 (1977-06-01), Hurko

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