Patent ID: 6278094
Filing Date: 2001-08-21
Classification: H05B

Abstract:
An induction heating system for a thermal roller comprising a rotatable hollow roller jacket having flanges at opposite ends thereof, the flanges concentrically surrounding the axis of the roller jacket and the roller jacket defining an enclosed space, and an inductor arranged within the enclosed space and inductively coupled with the roller jacket, the inductor consisting of an inductor spool through which a current flows and a magnetic core formed by the roller jacket, the inductor spool comprising a plurality of elongated outer current conductors peripherally arrayed close to an inner surface of the roller jacket and extending parallel to the axis at least across the greatest surface width of the roller jacket, the inductive coupling with the roller jacket being adjustable in zones, and flanges concentrically surrounding the axis, the roller jacket flanges forming bearings for the inductor spool flanges.