A drum assembly includes a support bar, expandable spokes extending away from the support bar, drum segments mounted to the expandable spokes, support brackets disposed on the support bar, a primary mechanical actuator extending between the support brackets, and secondary mechanical actuators extending from the support brackets.

A separator unit suitable for being used in a cutting line of laminar materials into strips, of the type comprising an expandable shaft, a storage magazine for storing separator tools, which is operatively associated with an end of the expandable shaft, separator tools provided with ring nuts configured to allow the translation of the separator tools from the storage magazine to the expandable shaft, and vice versa, the separator tools being susceptible to being locked on the expandable shaft, and translation apparatus means configured to translate the separator tools along the expandable shaft. The separator unit provides for the expandable shaft to be provided with a first slit adapted to house a locking element with a knurling on its outwards facing surface and susceptible to translating in radial direction and provides for the ring nuts to have a counter-knurling on a length of their surfaces facing the expandable shaft. The knurling and the counter-knurling are configured to fixedly couple when the surface of the locking element is placed in contact with the surfaces of the ring nuts.

The invention relates to a winding shaft (1) for receiving at least one winding core, said winding shaft having a shaft body (2) made of fiber-reinforced plastic, preferably CFRP, having two bearing points (4, 5) at each end of the winding shaft, having radially displaceable clamping elements (20) distributed over the circumference and over the axial length for clamping, holding and releasing the winding cores. The winding shaft is designed to hold winding cores having an inside diameter of a maximum of 80 mm.

A friction shaft for a slitter has winding tubes disposed on an outer surface thereof to roll unit materials formed by cutting a raw material such as various kinds of paper, fabric, or film with predetermined intervals. The friction shaft includes a first rotary shaft, tubes, lug bodies for torque, first fixed shafts, brake pads, a second rotary shaft, guide members, lug bodies for clamping, second fixed shafts, a plurality of lug rollers, covers, a first elastic member, and second elastic members.

A friction shaft for a slitter has winding tubes disposed on an outer surface thereof to roll unit materials formed by cutting a raw material such as various kinds of paper, fabric, or film with predetermined intervals includes a first rotary shaft, tubes, brake pads, a second rotary shaft, pressing members, first rotary tubes, second rotary tubes, first and second bearings, first elastic members, guide members, second elastic members, and lugs for clamping.

A fixing structure for fixing a reel is disclosed. The fixing structure includes a shaft having a first end having a first plurality of protrusions, and a second end having a second plurality of protrusions, wherein each of the first plurality of protrusions and one of its adjacent protrusions have a first recess therebetween, and each of the second plurality of protrusions and one of its adjacent protrusions have a second recess therebetween; and a supporting device, including a first supporting portion supporting the first end, and having a first protruding portion abutting the first recess; and a second supporting portion supporting the second end, and having a second protruding portion abutting the second recess.

A drum assembly includes a support bar, expandable spokes extending away from the support bar, drum segments mounted to the expandable spokes, support brackets disposed on the support bar, a primary mechanical actuator extending between the support brackets, and secondary mechanical actuators extending from the support brackets.

A monitoring system for pneumatic shafts and pneumatic shaft adapters. A sensor assembly is physically joined in operative engagement with the bladders of pneumatic shafts and adapters. Sensed data is wirelessly transmitted to a remote receiver for processing and display.

A multi-bladder, expandable winding shaft with discontinuous expanding elements is provided including a shaft body made with carbon fiber composites. The shaft comprises an inner and outer tube and two types of profiles, cavity and ledge profiles. The cavity and ledge profiles can be adhesively mounted around the outer surface of the inner tube in an alternating fashion. Ledge profiles hold the expandable bladders and lug assembly. The outer tube can be created by applying layers of carbon fibers, woven or unwoven fabrics or prepregs by filament winding, roll wrapping or any other suitable method. Elongated discrete slots through the outer tube are provided along the ledge profiles. When the bladders are inflated with air, the lugs are pushed outward to engage the inner wall of the core. When deflated, an installed spring system pushes the lugs inward.

The invention describes a sleeve for sliding onto and removing from a winding shaft, which comprises a one-piece workpiece defining a cylinder, which workpiece comprises two edge regions each having an edge, the edge regions overlapping one another, the sleeve having a first diameter in a relaxed state, the sleeve in a clamped state having a second diameter which is different from the first diameter, the sleeve in the clamped state experiencing an elastic deformation as compared to the relaxed state.