Abstract: A rotary cutting mechanism for transversely slicing an elongated rotatably driven roll of material such as plastic film into a number of narrower rolls includes a pair of spaced-apart knife cutting blades mounted for free rotation about an axis parallel to the longitudinal axis of the roll. A rotary saw blade is mounted intermediate and in axial alignment with the cutting blades, and is independently driven to remove material between the cutting blade edges as the blades are moved together to slice the roll. The finished narrower cut rolls therefore exhibit smoothly finished side edges and are readily separable from each other, there being no frictional heat developed by the cutting blade edges which are free to turn with the material on the roll as they slice through it.

Abstract: An improved roll slitting machine of the type used to slit wide rolls of material into narrow width rolls or ribbons includes an air chuck having gripping jaws which are actuated through multiple fluid logic paths to grip the roll of material for rotation about a changeable stationary mandrel. One end of the mandrel is supported by the machine frame and the opposite end is supported for quick release in the chuck.

Abstract: A multiple shaft, turret roll-slitting machine having a slitting knife mounted for movement along a path parallel to the axis of a roll to be slit and for radial movement into the roll at selected axial locations. The machine has at least two shafts upon which rolls of material are to be mounted and those shafts are movable from a cutting station to a loading and unloading station and are mounted on a turret to achieve such movement. When a first shaft is in the cutting station, it is oriented relevant to the slitting knife such that it can be slit into narrow width tape or ribbons by the slitter. At the same time, a second shaft is located in the loading and unloading station such that a previously slit roll can be removed and a new roll can be loaded into the shaft while the roll on the first shaft is being cut. The turret is then indexed reversing the positions of the first and second shafts.