Apparatus for continuous-direct-resistance heating of long-length articles

Abstract From the Canadian patent

An apparatus for continuous-direct-resistance heating of works such as long-length articles comprises roll electrodes disposed along a feeding path to contact the travelling work. An annular tranformer in which the work passing through is disposed between the roll electrodes; and conductive members with sufficiently less electrical resistance than that of the work is located between the roll electrodes disposed on the periphery of the transformer with the both ends thereof connected to the roll electrodes through a slider. A current is induced in the work with the conductive members as the retrace which efficiently, heats the work, having a higher resistance without affecting, other areas. …