Roll charged with heat transfer medium

Abstract

A roll charged with a heat transfer medium includes a heater which is easy to replace and measures by which the temperature in the axial direction of the roll can be kept uniform during operation. A hollow portion of the roll, which can be opened to the atmosphere, is located at a central axial portion of the roll. The heater is a rod-shaped heater and extends along the central longitudinal axis of the hollow portion. Metal having a low melting point is provided between the heater and an inner peripheral surface of the hollow portion. A heat transfer medium is charged in the hollow portion at the periphery thereof. The heat transfer medium may contact a circumferential part of the heater. In addition, a spiral groove or fin may be provided on an internal surface of the hollow of the portion of the roll body that is charged with the heat transfer medium.

Dependencies are inferred from the claim text.