Abstract: An air-controlled differential rewind mandrel for simultaneously winding multiples of web material (slit strips) mounted onto cores in rewind machines having two or more rewind mandrels, means for providing constant torque to each rewind roll formed by the individual slit strips, core engaging shoes formed in arcuate segments positioned around the mandrel, the segments being formed with elongated arcuate outer surfaces having extended purchase contact with the tape winding cores for a substantial part, such as 180 degrees, per rotation of the mandrel, with the inner surfaces of the cores, each shoe being differentially movable relatively to the others as required by tension conditions encountered, and in any desired numerical groupings, and adjustable positional means engageable with the shoes, obviating the necessity for complex adjustment and down time heretofore required to conform to the positions of cores of different widths on the mandrel, and various torque requirements encountered in practise.

Abstract: An air-controlled differential rewind mandrel for simultaneously winding multiples of web material (referred to hereinafter as slit strips) mounted onto cores provided in slitting and rewind machines with two or more rewind mandrels, and means for providing constant torque to each rewinding roll formed by the individual slit strips.

Abstract: This invention relates to compact slitting mechanism units structured so to enable a plurality of such units to be positioned in abutting, close, parallel relation, for narrow width cutting, slitting or other operations, said units including pressure chambers and knife holding and aligning mechanisms with structural features enabling knife elements and actuator cylinder mechanisms of the units to be mounted in essentially unitary axially aligned relation, and having novel means for mounting and actuating the knives and for enabling removal and replacement of any knife of any unit without disassembly of parts, in a safe convenient and simple manner, the pressure chamber-knife-holding mechanism assemblies being structured of equal widths, to facilitate side-by-side positioning of plural assemblies thereof, enabling narrow width contacting operations to be performed on surfaces to be slitted or otherwise multiply so contacted thereby.