DEVICE HAVING TENSION CONTROL MEANS INCLUDING A COIL SPRING FOR CONTROLLING THE TENSION IN AN ELONGATE MATERIAL

摘要

In a device (1) in which an elongate material (2) which can be wound in the form of a roll (18) is drivable in a transport direction (3) and which has tension control means (20) for controlling the tension in the material (2) when the material (2) is driven, which tension control means (20) comprise a flexible braking member which is passed around a braking drum (19), the braking member is formed by a coil spring (29) which has two spring arms (32, 33) of which one spring arm (32) is movable in order to influence the braking force of the coil spring (29) in dependence on the instantaneous tension in the material (2).