Resistance heater for a pizza carton

Metal working – Method of mechanical manufacture – Electrical device making

Patent

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Details

29619, 29620, H01C 700

Patent

active

041738233

ABSTRACT:
In the fabrication of a resistance heater for a carton for packaging a pizza, an aluminum metallized sheet is adhered to a paperboard panel, a generally U-shaped strip of arc-sprayed zinc is applied to three edge portions of the upwardly facing electrically conductive metal layer of the metallized sheet, the interconnecting portion of the U-shaped strip and the immediately underlying metal layer are severed, and the metal layer is severed along a line extending adjacent the same interconnecting portion to the side thereof enclosed by the U-shaped strip, so that each of the severed sections of the interconnecting portion serves as a terminal for a corresponding leg portion of the U-shaped strip comprising the electrodes for the intermediate region of the metallized sheet.

REFERENCES:
patent: 2843711 (1958-07-01), Crick
patent: 2882377 (1959-04-01), Rinehart
patent: 2961522 (1960-11-01), Hammer
patent: 3296415 (1967-01-01), Eisler
patent: 3721803 (1973-03-01), Distefano
patent: 3737624 (1973-06-01), Eilenberger
patent: 3766644 (1973-10-01), Davis
patent: 3790752 (1974-02-01), Boaz
patent: 3874763 (1975-04-01), Hoover
patent: 4115917 (1978-09-01), Charon

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