PERFORATING DEVICE AND CONVERTING MACHINE COMPRISING SAID DEVICE

The perforating device (5) for perforating a web material (N) comprising a first blade-holder (25; 27) adapted to rotate around a respective first rotation axis (25 A; 27A) and on which at least a first perforating blade (29; 31) is mounted. The device further comprises a support beam (21), on which a plurality of counter-blades (23) are mounted; said support beam (21) being angularly adjustable around a selection rotation axis (21 A) thereof in a plurality of angular working positions, in each angular working position one of the counter-blades (23) being in an operative position. A movable abutment (33) is also provided adapted to co-act with the support beam (21). A first actuating device (43) is provided for moving the movable abutment (33) between an active position, where the movable abutment (33) co-acts with the support beam (21), and an idle position, where the movable abutment (33) is spaced from the support beam (21). A second actuating device (61) is provided for rotating the support beam (21) in o