US 12,030,736 B2
Rewinding machine and method for controlling the speed of the motors in a rewinding machine
Franco Sforzi, Capannori (IT)
Assigned to A. CELLI PAPER S.P.A., Capannori (IT)
Appl. No. 17/283,478
Filed by A.CELLI PAPER S.P.A., Capannori (IT)
PCT Filed Oct. 3, 2019, PCT No. PCT/IB2019/058419
§ 371(c)(1), (2) Date Apr. 7, 2021,
PCT Pub. No. WO2020/075018, PCT Pub. Date Apr. 16, 2020.
Claims priority of application No. 102018000009236 (IT), filed on Oct. 8, 2018.
Prior Publication US 2022/0009739 A1, Jan. 13, 2022
Int. Cl. B65H 23/18 (2006.01)
CPC B65H 23/1806 (2013.01) [B65H 2301/41485 (2013.01); B65H 2513/11 (2013.01); B65H 2515/31 (2013.01); B65H 2701/1924 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A rewinding machine for unwinding primary reels of a web material and rewinding said web material in secondary reels, comprising:
a winding station with winding members operated by at least one winding motor;
at least one unwinder with at least one unwinding member operated by at least one unwinding motor;
at least one guide roller along a feed path of the web material;
at least one load sensor associated with the guide roller, the load sensor being configured to detect a parameter proportional to the tension of the web material guided around the guide roller; and
a control unit adapted to modulate a difference in speed between the winding members and the unwinding member as a function of a signal from the load sensor.