Electrically heated pizza package
US4134004A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1977 |
| Grant date | Jan 9, 1979 |
| Priority date | — |
| Expiry date | Jul 18, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2585/366
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.