Abstract: A chuck is mounted on a drive shaft and torque can be transferred to an inner ring (30) of the chuck from the drive shaft. A casing (28) of the chuck surrounds the inner ring and supports four circumferentially-spaced cam elements (40) for gripping and supporting the core. Each cam element comprises a cam pivotably mounted on the housing and operated by a cam roller (58) mounted on the inner ring. Relative rotation of the inner ring and the casing causes the cam roller to move along a cam surface on the underside of its cam and to raise either end of the cam to engage the core. A switching element (80) is housed in a chamber in the casing between each pair of cam elements. Each switching element comprises a detent spring (90) having a central detent and being captive within the chamber (82), and a detent roller (88) mounted on the inner ring.

Abstract: A reeled feed web is unreeled and passed through a set of slitting knives before the slit webs are rewound on rewind reels each carried by one of two differential or lock-bar shafts. The shafts are fixed in position and the slitting knives and rollers for handling the feed web and the slit webs are mounted on a movable carriage which can be traversed towards or away from the shafts. The carriage includes two mounting beams, parallel to the shafts, on which lay-on rollers can be mounted for guiding or laying-on slit webs onto respective rewind reels carried by the shafts. Variable predetermined torques can be applied to the rewind reels and the lay-on rollers, and the movement of the carriage controlled, to implement any of the following winding geometries; center winding, center winding with lay-on, surface winding, center surface winding and constant gap winding. The shafts are cantilevered so that reels can be unloaded from the ends of the shafts.