Patent ID: 7786408

Claim:
An electric warming blanket, comprising: a flexible heater comprising a non-conductive layer coated with a conductive material, the heater including a first end, a second end, a first edge extending between the first and second ends, and a second edge, opposite the first edge, extending between the first and second ends; a first conductive bus bar disposed alongside the first edge of the heater and extending beyond the first and second ends of the heater to be terminated just beyond either end; a second conductive bus bar disposed alongside the second edge of the heater and extending beyond the first and second ends of the heater to be terminated just beyond either end; at least one first row of stitching coupling the first bus bar to the heater, the at least one first row of stitching extending along the first bar; at least one second row of stitching coupling the second bus bar to the heater, the at least one second row of stitching extending along the second bus bar; the first and second bus bars adapted for coupling to a power source for powering the heater; a first lead for coupling of the first bus bar to the power source and a second lead for coupling of the second bus bar to the power source, the first lead and the second lead being coupled to the first bus bar and to the second bus bar, respectively, between the first and second ends of the heater; and a first layer of water resistant material coupled to a second layer of water resistant material about a perimeter of the heater to form a sealed space for the heater and the first and second bus bars, without being adhered to either of the heater and the first and second bus bars; and wherein the first and second layers of water resistant material enclose an entirety of the first and second bus bars and the first and second leads.