Abstract: An elongated workpiece is inductively heated by a difference in an amount of magnetic flux flowing in a portion of the elongated workpiece compared to an amount of magnetic flux around the same portion of the elongated workpiece. The flux differential induces circumferential eddy currents to heat that portion of the workpiece. The alternating magnetic flux is conducted to the workpiece in a high permeability flux guide.

Abstract: Alternating magnetic flux is directed through a high permeability flux guide to an area of overlapped electrically-conductive sheets between which a heat-curable adhesive material is positioned. Energy from the flux creates eddy currents in the overlapped sheets which dissipate power as heat, and the heat cures the adhesive to bond the sheets together. In addition to bonding, energy consumption is reduced and more uniformity in heating and curing of the adhesive material results from using the flux guide.