Patent ID: 6548789
Filing Date: 2003-04-15
Classification: D04B,D10B,H05B

Abstract:
A method of forming an electric resistance heating/warming composite fabric article, comprising:providing a fabric layer having a first surface of raised fibers of electrically-insulating material and an opposite, second surface, mounting an electricity conductive yarn among, the raised fibers of the first surface of the fabric layer in a manner to cause the raised fibers to electrically isolate adjacent segments of the electrically conductive yarn disposed in a predetermined pattern of an electric circuit to form an electric resistance heating/warming element adapted for connection to a power source, thereby to generate heating/warming, connecting adjacent segments of the electrically conductive yarn in the electrical circuit in parallel, with a first segment of the conductive yarn having a first resistance and a second segment of the conductive yarn having a second resistance, the first resistance being different from the second resistance, and positioning a barrier layer resistant to passage of air and water droplets and permeable to passage of water vapor at least adjacent to at least one of the first surface of the fabric layer and the opposite, second surface of the fabric layer.