Abstract: The device comprises at least a first series of slides (21) each carrying a respective cutting tool (9). The slides are adjustable and clampable in pre-established positions along a beam (11) extending more or less transversely with respect to the direction of feed of the web material. Moreover, a system to clamp the slides along said beam and a translation member (71) to translate and position said slides along the beam are provided. The clamping system comprises, for each slide, a pressing member (33) elastically stressed against a fixed surface (29A) integral with the beam, while the translation member comprises an actuator (74) cooperating selectively with one or other of said pressing members, to release the pressing member from the fixed surface and draw the slide by means of the translation member and position it along said beam.

Abstract: The rewinding machine includes: at least a first and a second winding cylinder (3, 5), whose axes are parallel, defining a winding cradle (7) in which said reels of web (N) are formed, and mating centers (65) for engaging and withholding the winding mandrels (M, M1, M2) on which the reels are formed in the winding cradle. It is further provided a pair of lateral flanks (43), on each of which a corresponding guide (61) defining a closed path is arranged, along which guide a plurality of said mating centers (65) are mobily arranged. Each mating center associated to one of said flanks is aligned with a corresponding mating center associated to the other of said flanks. It is further provided a drive system to move the mating centers along each of said guides.