Abstract: The invention relates to a drive for a rotatable mantle roll mounted onto a stationary axle. The mantle is driven by one or more driving gears which are again driven by one or more shafts journalled in a supporting frame located around the stationary axle end. The driving gear or gears drive an internally toothed gear ring connected to the roll mantle. The improvement lies in that the supporting frame which is supported by rolling or sliding elements is placed inside a shell connected to the mantle or inside the mantle as a stationary unit with its different elements. The supporting frame is coupled by special elements not to rotate so that the said location with the mantle is possible.

Abstract: A roll and roll-driving assembly includes an internal stationary shaft and an outer shell surrounding the internal shaft as well as a bearing structure supporting the outer shell for rotation with respect to the internal shaft. A rotary input shaft is coaxial with the stationary shaft to receive a rotary drive from an outside source. A sun gear is fixed coaxially to the rotary input shaft so as to rotate therewith, while a plurality of planetary gears which respectively have axes parallel to the axis of the input shaft and which mesh with the sun gear are uniformly distributed about the axis of the input shaft. An internal ring gear surrounds and meshes with the planetary gears while being supported exclusively thereby so that the internal ring gear can automatically center itself with respect to the plurality of planetary gears while a load is uniformly distributed along a plurality of power-transmission paths extending from the sun gear through the plurality of planetary gears to the internal ring gear.

Abstract: A roll drive for a machine of the type used in connection with the manufacture of paper. The roll which is to be driven has an end situated at a plane which is normal to the roll axis, and at the latter plane there is a supporting structure which supports the roll for rotation about its axis. Closely adjacent to this plane is a planetary gear transmission having an output and an input. The latter output is connected by way of a suitable transmission structure to the end of the roll for driving the latter with the output of the planetary gear transmission, while a rotary drive is connected to the input of the planetary gear transmission for driving the roll through the latter transmission and structure connected between the planetary gear transmission and the end of the roll.

Abstract: A rotary assembly which has an inner shaft and an outer hollow cylinder coaxially surrounding and freely rotatable with respect to the inner shaft. A drive shaft is coaxial with the inner shaft and is freely rotatable with respect thereto, this drive shaft carrying an inner gear which rotates with the drive shaft. An intermediate gear meshes with the inner gear, and this intermediate gear is mounted directly on the inner shaft for free rotation with respect thereto. A circumferential gear transmission which is coaxial with the inner shaft and the outer cylinder meshes with the intermediate gear and is operatively connected with the cylinder to transmit rotation thereto from the intermediate gear which is driven by way of the inner gear from the rotary drive shaft.