A take-up device includes a fluid-pressure device, a pressure detection device, a pressure calculation mechanism, and a controller. The fluid-pressure device is a device for expanding and contracting a mandrel. The pressure detection device detects a pressure of a hydraulic fluid in the fluid-pressure device. The pressure calculation mechanism calculates a tightening pressure acting on the mandrel, based on the pressure detected by the pressure detection device. The controller controls the fluid-pressure device. Also, the controller performs position control until the number of turns of a strip reaches a value. The controller performs constant-pressure control after the number of turns of the strip reaches the value.

A take-up device includes a fluid-pressure device, a pressure detection device, a pressure calculation mechanism, and a controller. The fluid-pressure device is a device for expanding and contracting a mandrel. The pressure detection device detects a pressure of a hydraulic fluid in the fluid-pressure device. The pressure calculation mechanism calculates a tightening pressure acting on the mandrel, based on the pressure detected by the pressure detection device. The controller controls the fluid-pressure device. Also, the controller performs position control until the number of turns of a strip reaches a value. The controller performs constant-pressure control after the number of turns of the strip reaches the value.

A telescopic pneumatic linear actuator, particularly for unwinders with movable arms, includes a first annular cylinder, provided with a respective cavity, and a second annular cylinder, which can be inserted into and can slide within the cavity of the first annular cylinder and is provided with a respective cavity. The actuator also includes an annular piston, which can be inserted into and can slide within the cavity of the second annular cylinder. The first and second annular cylinders and the annular piston are provided with respective holes for the passage of a self-expanding spindle.

SUBSTITUTE SPECIFICATION CLEAN COPY A reel device has a reel mandrel for winding up a strip. The reel mandrel has a plurality of segments distributed over the perimeter thereof, which are each joined via at least two link plates to a control rod that can be axially moved in the reel mandrel, for radially extending and retracting the segment. To reliably identify wear conditions of internal components of the reel mandrel that are not visible from the outside, a method for operating the reel device provides that, during the service life of the reel device, the segments are moved multiple times into certain operating positions and in each case the respective distances of the segments in relation to a stationary operating position are determined. The distances recorded at different points in time are evaluated whether they exceed or fall below a predefined threshold value, and wear condition is inferred therefrom.

SUBSTITUTE SPECIFICATION CLEAN COPY A reel device has a reel mandrel for winding up a strip. The reel mandrel has a plurality of segments distributed over the perimeter thereof, which are each joined via at least two link plates to a control rod that can be axially moved in the reel mandrel, for radially extending and retracting the segment. To reliably identify wear conditions of internal components of the reel mandrel that are not visible from the outside, a method for operating the reel device provides that, during the service life of the reel device, the segments are moved multiple times into certain operating positions and in each case the respective distances of the segments in relation to a stationary operating position are determined. The distances recorded at different points in time are evaluated whether they exceed or fall below a predefined threshold value, and wear condition is inferred therefrom.