Heatable variable crown roll.

摘要

The invention concerns a method for heating of a roll, in particular of a press roll or calender roll in a paper or board machine. The roll comprises a preferably hollow, tubular roll mantle (12). According to the invention, the roll (10) is heated with electric current by means of electric resistors (2) fitted inside the body material of the roll mantle (12). The heating is preferably applied to the roll (10) substantially at the proximity of the face of the roll mantle ( 12), and the electric current is supplied to the electric resistors (2) at least from the ends of the roll ( 10).