Patent ID: 6079658
Filing Date: 2000-06-27
Classification: B65H,G11B

Abstract:
A device (1)in which an elongate material (2) which can be wound in the form of a roll is drivable in a first transport direction (3) andwhich has drive means (10) for driving the material (2) in the first transport direction (3), which drive means (10) comprise a winding spindle (15) for driving a roll (18) of the material (3), which winding spindle (15) is in driving engagement with a cylindrical braking drum (19), andwhich has tension control means (20) for controlling the tension which occurs in the material (2) when the material (2) is driven in the first transport direction (3), which tension control means (20) comprisea movably supported control member (21) andspring means (26) which act on the control member (21) and which load the control member (21) in a given direction of movement (27), anda sensor (28) arranged on the control member (21), around which sensor the material (2) is passed and via which the control member (21) is movable against the given direction of movement (27), opposed by the force of the spring means (26), in accordance with the tension occurring in the material (2) when the material (2) is driven in the first transport direction (3), anda flexible braking member which is passed around the cylindrical circumferential surface (31) of the braking drum (19) and which has a movable braking member portion which extends away from the braking drum (19) and is movable with the aid of a control portion (36) of the control member (21) in order to influence the braking action of the braking member on the braking drum (19),characterized in thatthe braking member is formed by a coil spring (29) andthe coil spring (29) has two spring arms (32, 33) which extend away from the braking drum (19), which spring arms (32,33) each cooperate with an associated spring stop (34, 35) and of which one spring arm (32) is movable away from its associated spring stop (34) by means of the control portion (36) of the control member (21) in order to influence the braking action of the coil spring (29) on the braking drum (19).