W. Schlafhorst Ag & Company

W. Schlafhorst & Co.

Wilhelm Zitzen

Ferdinand-Josef Hermanns

Herbert Knors

Dietmar Engelhardt

Robert Hartel

Herbert Henze

Herbert Merkens

Berndt Pommer

Wolfram Weissenfels

Manfred Veyes

Hermann Ruetten

Dirk Jaegers

Karl-Josef Hoehne

Hans Grecksch

Heinz Kamp

Ulrich Wirtz

Edmund Wey

Manfred Marquardt

Hermann Rutten

Karl-Josef Hohne

Albert T Pesch

Dirk Jagers

At each work station of a textile machine producing wound bobbins, the yarn package on which yarn is wound is driven by a friction roller. In contrast to the conventional driving of the roller by a gear motor flanged to the housing of the work station, which has the disadvantage of requiring space and difficulty in removing and replacing the friction roller for maintenance, the present invention simplifies the friction roller drive by configuring the housing of the work station for the direct reception of the stator windings of the drive motor for the friction roller and mounting the friction roller and the rotor of the drive motor together on a continuous shaft.

Device for winding of yarn packages

A textile machine includes a cheese or cross-wound bobbin winder with winding stations each having a creel for holding a cheese, a reversible rotary cheese drive, a suction nozzle and a swivel drive for swivelling the suction nozzle to the jacket surface of the cheese. A method for grasping a yarn end resting on the cheese includes adjusting a search time during which the inward-swivelled suction nozzle is positioned at the reverse-rotating cheese, in dependence on the instantaneous diameter of the cheese, and on the reverse speed of the rotary cheese drive, which is kept constant over the entire search time. An apparatus for grasping a yarn end resting on the cheese includes a control device, control lines connecting the reversible rotary cheese drive and the swivel drive of the suction nozzle to the control device, and measured value pickups at each winding station for recognizing a predetermined number of cheese revolutions, for detecting the speed of the rotary cheese drive, and for recognizing the swivelled position of the suction nozzle.

Method and apparatus for grasping a yarn end on a cheese

A creel relief device (1) for exerting a relatively constant pressure of a cheese (24) on a yarn guide drum (6) in a textile cheese producing machine over the course of building the wound diameter of the cheese. The creel relief device (1) has two meshing toothed segments (10 or 14) respectively disposed on lever elements (8 or 15), one lever element (8) being connected with the creel shaft (7) securely against rotation relative thereto, while the other lever element (15) is pivotably mounted to be acted upon by a prestressed tension spring (19) extending between the lever element (15) and a setting lever (21), which can be locked in different positions for predetermining torque to be applied to the creel.

Creel relief device for a yarn winding apparatus

The invention to a yarn tension sensor, in particular for yarns traveling at high speed, to accurately ascertain even short-term yarn tension fluctuations. According to the invention, a yarn guide element is mounted on one head end of a plunger coil disposed in a magnetic field. A position sensor is disposed in the region of the plunger coil and detects even minimal changes in position of the plunger coil. These changes in position are reported to a controller, at whose output variations in current are generated and supplied to the winding of the plunger coil, the variations being such to compensate for the axial force generated by the yarn and acting upon the plunger coil, thereby making the plunger coil virtually motionless.

Yarn tension sensor for a textile machine

The present invention relates to a brake disk arrangement for a yarn tensioning device wherein at least one of a pair of opposed facing brake disks can be acted upon by a variable pressing force in the direction of the other brake disk. According to the present invention, rotary motion is transmitted from one brake disk to the other in a simple manner, without affecting the brake force, by connecting to one of the brake disks a concentric magnet that is secured against relative rotation with respect to this brake disk, and by connecting to the other brake disk a concentrically arranged body of hysteresis material which is secured against relative rotation with that brake disk. At least the brake disk that can be acted upon the variable pressing force comprises a nonmagnetic material and is changeable in position axially relative to the magnet or the hysteresis material associated with the disk. In alternate embodiments, both brake disks may be provided with a magnet.

Rotationally driven brake disk arrangement of a yarn tensioning device

A method and winding apparatus for detecting feed bobbins having feed properties that do not correspond to a predetermined quality when winding feed bobbins onto cross-wound bobbins in an automatic bobbin winding machine is disclosed. The method comprises the steps of measuring the winding speed, counting yarn breaks before a predetermined threshold speed is reached for forming a yarn break count, detecting the quality of a given feed bobbin by comparing the yarn break count with a predetermined number and determining that the given feed bobbin has not attained a predetermined quality if the yarn break count reaches the predetermined number; if the quality is not attained, the given feed bobbin is rejected and the winding process is continued with a new feed bobbin.

Method and apparatus for detecting the feed properties of feed bobbins

A rotating driven brake plate apparatus of a yarn tensioning device includes a brake plate, a brake plate carrier having an end, a ball and socket device centrally and swivelably supporting the brake plate at the end of the brake plate carrier, and a device disposed outside the ball and socket device for driving the brake plate.

Rotating driven brake plate apparatus of a yarn tensioning device

A controllable and adjustable yarn tensioner having two rotationally driven brake plates, between which yarn to be placed in tension is guided, includes first and second rotationally supported shafts, one of the brake plates being disposed at one end of the first shaft, the other end of the first shaft having an operative connection with a driving device; the other of the brake plates being disposed at one end of the second shaft; both the first and the second shafts being in mutual alignment along a common rotary axis, the other end of the first shaft being also connected, via a transmission system disposed outside of the brake plates, to the other end of the second shaft; one of the two brake plates having a compression spring contributorily determining the braking force at which the brake plates are applied, whereby the braking force is adjustable by adjusting the length of the spring; the first shaft being axially slideable; and a brake plate-disengagement device connected to the first shaft.

Controllable and adjustable yarn tensioner

A controllable and adjustable yarn tensioner having two rotationally driven brake plates, between which yarn to be placed in tension is guided, includes first and second rotationally supported shafts, one of the brake plates being disposed at one end of the first shaft, the other end of the first shaft having an operative connection with a driving device; the other of the brake plates being disposed at one end of the second shaft, the other end of the first shaft being also connected, via a transmission system disposed outside of the brake plates to the other end of the second shaft, the first shaft being axially slideable; and a brake plate-disengagement device connected to the first shaft; at least one of the two brake plates being connected to an adjustable compression element contributorily determining the braking force at which the brake plates are applied; the first and the second shafts having respective rotational axes spaced from and parallel to one another.

Growing community of inventors

Monchengladbach, Germany

Wilhelm Zitzen