Abstract: A machine frame mounts a pair of upper and lower girder-like box beams (10,11) of heavy construction. A plurality of upstream upper scoring assemblies (28) and a plurality of downstream upper slitting assemblies (30) are mounted on the upper box beam. The lower box beam (11) also supports a plurality of upstream lower scoring assemblies (29) and a plurality of downstream lower slitting assemblies (31). The assemblies include rotatably driven slitting or scoring blades (32, 33). The box beams extend transversely of a traveling web (2). The assemblies include a motor (50) connected to be driven along its beam, and an encoder (52), with all of the motors and encoders being electrically connected to a programmable computer (54). The computer may be pre-programmed with the position and spacing of all of the assemblies, so that upon the provision of a single input signal all of the motors simultaneously drive all of the assemblies to their desired position.