US 12,275,159 B2
Perforating device and converting machine comprising said device
Mauro Ricci, S. Pietro a Vico (IT); Daniele Vannucci, Lucca (IT); and Fabrizio Lorenzi, Lucca (IT)
Assigned to Fabio Perini S.p.A., Lucca (IT)
Appl. No. 17/297,573
Filed by FABIO PERINI S.P.A., Lucca (IT)
PCT Filed Nov. 27, 2019, PCT No. PCT/IB2019/060218
§ 371(c)(1), (2) Date May 27, 2021,
PCT Pub. No. WO2020/110020, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 102018000010637 (IT), filed on Nov. 28, 2018.
Prior Publication US 2022/0024062 A1, Jan. 27, 2022
Int. Cl. B26D 1/38 (2006.01); B26D 7/26 (2006.01); B26F 1/20 (2006.01); B65H 35/08 (2006.01)
CPC B26D 1/385 (2013.01) [B26D 7/26 (2013.01); B26F 1/20 (2013.01); B65H 35/08 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A perforating device for perforating a web material, comprising:
a first blade-holder adapted to rotate around a respective first rotation axis and wherein at least one first perforating blade is mounted on the first blade-holder;
a support beam, on which a plurality of counter-blades are mounted; said support beam being angularly adjustable around a selection rotation axis thereof in a plurality of angular working positions, wherein in each of said plurality of angular working positions one of the counter-blades is in an operative position;
a movable abutment adapted to co-act with the support beam, wherein the support beam is integral with a plurality of abutment surfaces adapted to co-act selectively with said movable abutment;
a first actuating device adapted to move the movable abutment between
an active position, in which the movable abutment co-acts with one abutment surface of said plurality of abutment surfaces of the support beam; and
an idle position, in which the movable abutment is spaced from the support beam, and the support beam is free to rotate around the selection rotation axis of the support beam, to bring another one of said plurality of abutment surfaces in a position for co-action with the movable abutment; and
a second actuating device adapted to rotate the support beam in order to arrange the support beam selectively in one of said angular working positions;
wherein the first actuating device and the second actuating device are controlled in a coordinated manner by a control unit.