| 摘要 |
A press roll with controllable deflection, for treatment of web type material, specifically for the treatment of a paper web (2), with a roll shell (1) that is rotatably connected with an axle (10) serving as flexural backing and defining with it an annular intermediate space. Within this intermediate space, in the area of the roll ends, there is a seal (transverse seal 18) each provided, and at that, in such a way that between the end of the roll shell (1) and the transverse seal (18) there remains on both sides of the web-shaped material (2) a free marginal zone (R). There is provided on each roll end, in the area of the marginal zone (R) on the inside of the roll shell (1), a channel type cavity (6) that can be charged with a heat transfer fluid. This makes it possible to directly and specifically influence thermally the diameter of the roll, on both ends of the roll in the area of the marginal zones, so that diameter differences between the marginal areas of the roll and the center area can be compensated for in the operation of the press roll. |
