Patent ID: 7145116
Filing Date: 2006-12-05
Classification: H05B,Y02B,Y10T

Abstract:
1. An induction heating coil for use in an induction heating apparatus for induction heating an object to be heated made of a material such as copper or aluminum by passing a high-frequency current of 40 to 100 kHz, having a coil portion formed of a coil wire serving as a coil conductive wire and comprising stranded wires, each obtained by bundling and twisting multiple wires whose conductors are covered with a first insulating material, being covered on the outer faces thereof with a second insulating material formed of a fluorocarbon resin having insulation layers having different melting points, the melting point of the fluorocarbon resin for use in the outermost insulation layer of said second insulating material being made lower than the melting point of PFA serving as the fluorocarbon resin for use in the inner insulation layer thereof, said coil wire being wound a predetermined number of turns so as to have a predetermined shape and heated to fuse said outermost insulation layer formed of the fluorocarbon resin and to carry out bonding.