Abstract: A winder preferably for winding separate metal strips into coils following slitting a wider strip, comprises a power-operated mandrel and pyramidal sleeves successively mounted on this same mandrel for axial movement. On the pyramidal sleeves, mounted for longitudinal movement thereon are segmental members forming a drum section on each pyramidal sleeve for winding a separate strip. The drum sections are interconnected by split rings having a generally U-shaped cross section and mounted on the power-operated mandrel and between adjacent drum sections are drive rings frictionally engaging the end surfaces of the pyramidal sleeves, whereby axial movement of pyramidal sleeves actuated by a mechanism for imparting such movement thereto brings about setting of the apparatus from a retracted to expanded position and vice versa.

Abstract: A coiling apparatus, wherein a band tension regulator is operatively coupled with a hydraulic cylinder for controlling a friction drive of a coiling drum whose rotation speed is governed in a control circuit. The control circuit couples a device for maintaining a constant slip in the friction drive of a coiling drum and a hydraulic drive of a coiler mounted for a reciprocating movement along the axis of the coiling drum, whereby a constant coiling pitch is maintained regardless of variations in the rotation speed of the coiling drum shaft.