Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1977-07-18
1979-01-09
Truhe, J. V.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219345, 219533, 219541, 219543, 339 91R, A21B 152, F27D 1102
Patent
active
041340043
ABSTRACT:
A paperboard carton for packaging a pizza is provided with a substantially rigid, pizza-supporting electrical-resistance heater insert comprising a corrugated paperboard panel having laminated thereto a sheet of vacuum-metallized glassine. Arc-sprayed zinc bus bars extend over opposed edges of the metallized sheet and serve as electrodes for conducting electricity through the sheet as the resistor element. Electrical energy is supplied to the electrodes by a removable terminal clip that extends through an opening provided in a side wall of the carton and both electrically and mechanically engages suitably presented electrode terminals. An insulating sheet of coated paper extends over the metallized surface, the electrodes, and the bus bars, and serves as the immediate support surface for the pizza.
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Anderson Thomas L.
Rasmussen Glenn A.
VanHandel Gerald J.
American Can Company
Auber Robert P.
Dorman Ira S.
Hargis, III Harry W.
Roskoski Bernard
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