ROLLER AND PROCESS FOR OPERATING THE SAME

摘要

The invention concerns a heated sag-compensation roller (2), with shorter heat-up and cool-down times and a more even temperature distribution, which reduces the risk of damage to the roller shell (5). These improvements are achieved by virtue of the fact that the roller shell (5) is heated or cooled from the inside (i) and the outside (a) simultaneously. The heating devices (12, 13) can be controlled so that the temperature difference between the inside (1) and outside (a) does not exceed a particular value.