Abstract: An adjusting device for the rolls of a calender having a hydraulic drive for the fine setting of the rolls in their working position and a hydraulic drive for positioning the rolls in the working, maintenance and roll-change positions. The hydraulic drive for positioning the rolls includes hydraulic cylinders having double-acting pistons. An interlock device is provided, by which the piston rod can be interlocked positively in the working position of the rolls, after which the piston rod can be acted on by a prestressing force opposed to the adjusting direction in such a way that the interlock has no play.

Abstract: A calender assembly having at least two calender rollers mounted on axles and which jointly define a calendering nip with at least one of the rollers being mounted for rotation in a support column. Each roller includes a roller axle and a roller core and at least one of the rollers is provided with a removable shell. The axle of the roller provided with the shell is provided with a bearing member acted upon by a plurality of bearing body portions. Adjustment devices are provided for displacing the bearing body portions towards and away from the bearing member. Such movement of the body portions away from the bearing member defines an aperture through which the shell on the roller can be removed and a replacement shell inserted.