Patent ID: 11937342
Assignee: BATTELLE MEMORIAL INSTITUTE
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A method of resistive heating, comprising:
providing a sheet of a resistive heating material that comprises an area or areas of reduced cross-sectional area which are adapted to constrict current flow through the sheet of heating material;
passing an electric current through the sheet such that the area or areas adapted to constrict current flow become a hot spot or hot spots that increase in temperature to a temperature that is at least 5 K greater than the average temperature of the sheet; and
wherein the area or areas of reduced cross-sectional areas are formed by opposing notches in the resistive heating material wherein each of the opposing notches has a feature angle of between 5 and 60 degrees.