Abstract: A yarn splicing device (10) for pneumatically joining two yarn ends (31, 32), with a splicing head (19) that is fixed on a foundation (22) and comprises a splicing conduit (20) with at least one opening (34) for delivering compressed air. The splicing conduit (20) comprises at least two additional suction intake openings (33) that can be loaded with a vacuum and are arranged on both sides of the opening (34) for delivering compressed air.

Abstract: A method for producing cheeses of the random winding type, wherein the workstations of an automatic cheese winder comprise a winding device with a yarn guide drum and a creel, both supported in an axially shiftable relation to each other, the creel holding the cheese in a rotatable manner and the yarn guide drum driving the cheese through frictional engagement, a ribbon disturbance device and an edge displacement device. The ribbon disturbance device causes a slippage by a defined adjustment of the bearing pressure of the cheese on the yarn guide drum. Relative movements between the yarn guide drum and the creel are initiated in the area of ribbon winding zones which counteract a stroke change caused by the ribbon disturbance during the winding of the yarn onto the cheese.

Abstract: An air-spinning arrangement has an opening device having a feed device and an opening roller for opening a sliver into individual fibers. A perforated removal roller receives the opened fibers from the opening roller in the circumferential direction. A conveyor belt conveys the fibers from the removal roller to a nip with a following air-spin nozzle for forming a yarn. The conveyor belt is arranged axially-parallel with the removal roller. A sufficiently close spacing of the conveyor belt from the removal roller is selected such that the fibers conveyed to the removal roller can be picked up by mechanical contact, and the conveyor belt is driven such that it deflects the fibers by approximately 90° and conveys them to the combing location. The air-spinning arrangement allows the formation of a fiber structure that is well suited to the air-spinning process.

Abstract: A creel (18) for a textile machine (1) producing cheeses (11), with a drive device (27) integrated into the creel (18) having an electromotor (35) which can be loaded with a braking current for braking the cheese (11) by initiating a braking moment directed counter to the rated current of the electromotor. A coolant circuit (36) is arranged inside the creel (18) for removal of the motor heat of the electromotor (35) of the drive device (27).

Abstract: A method of operating a textile machine for producing cheeses, at whose workstations (1) yarn (2) is unwound from supply bobbins (3), checked, cleaned of yarn defects and wound onto larger-volume cheeses (4) during which the yarn defects occurring the winding process in a given yarn length are registered. When a predetermined number of yarn joinders is exceeded within a predetermined reference yarn length, the winding process is stopped and the yarn length with the excessive number of joinders, already wound onto the cheese, is removed from the cheese (4).

Abstract: A winding device (24) for a textile machine (1) producing cheeses has a creel (18) for holding a cheese (11) between tube receiving plates (38, 38′), a yarn traversing device (28) comprising a separate drive (31), and a speed-regulatable drive device (27) integrated in the creel (18) to move in a bearing housing (23) of the creel (18) and connected to one of the tube receiving plates (38, 38′). The drive device (27) can be loaded with a braking current which produces a moment opposite the direction of rotation (SR) of the cheese (11), for braking the cheese (11). The drive device (27) is arranged in a sliding sleeve (35) that can be loaded pneumatically against the displacement force of spring elements (43) to move one of the tube receiving plates (38) outwardly as needed in a creel opening direction.

Abstract: An opening arrangement for an open-end spinning device with a rotating opening roller having opening elements stationarily arranged on its circumference for opening a delivered sliver into individual fibers and for combing out the fibers at a comb-out point. The opening roller has a mechanical stripping arrangement that rotates along with it. The stripping arrangement includes ejectors that are pivotably fastened on the opening roller. Each ejector is arranged between the opening elements and extends over the opening roller transversely in relation to the direction of rotation. The ejector strips combed-out fibers off the opening elements and improves the opening of the opening roller as well as the transfer of the fibers from the opening roller. The opening arrangement is advantageously employed with an open-end spinning frame.

Abstract: An open-end rotor spinning machine having a plurality of work stations, wherein each work station comprises an open-end spinning device for manufacturing a yarn, a winding device with a creel, a yarn traversing device for producing a cheese, a pivotably supported, vacuum-chargeable suction nozzle, an individual drive for pivoting the suction nozzle between a yarn take-up position in the area of the winding device and a yarn transfer position in the area of a spinning piecing member, and a device for preparing a yarn end required for restarting spinning. Each work station comprises a winding device with a drive drum driven by a reversible individual drive for driving a cheese and with a yarn traversing device driven by an individual motor for defined placement of the yarn running up onto the cheese, a yarn withdrawal device, and a work-station computer for controlling the individual drives and individual motors.

Abstract: A service unit for the automatic servicing of work stations of a textile machine for manufacturing cheeses, in particular for an open-end rotor spinning machine. The service unit comprises a pneumatic auxiliary yarn supply and removal device with a pivotably supported yarn supply tube and a yarn cutting device.

Abstract: A winding device (1) for a textile machine producing cheeses (8), having a cheese drive mechanism (5) acting on a tube receiving plate (6), a separately driveable yam cross-winding device (10), and a support and clamping roller (9), in frictional contact with the cheese (8) during winding operation. A braking device (20) is assigned for braking the support and clamping roller (9) when the winding operation is interrupted.

Abstract: A method and device for restarting a spinning operation at work stations (2) of an open-end spinning machine (1) after replacement of a cheese (8) with an empty tube by a traveling service unit (16) comprising an auxiliary yarn supply device (21). Each work station comprises a yarn spinning device (3) and a cheese winding device (4) with a creel (9). The auxiliary yarn supply device (21) delivers a starting portion of an auxiliary yarn (24) to a suction nozzle (14), which transfers the auxiliary yarn (24) to a spinning start member (20), after which the suction nozzle (14) pivots to re-take the auxiliary yarn (24) between the supply device (21) and the spinning start member (20) and removes the auxiliary yarn (24) after restarting the spinning operation, whereupon the yarn (7) is brought to the creel (9) of the work station (2).

Abstract: An open-end rotor spinning machine having at least two identical work stations, wherein each work station comprises an open-end spinning device for producing a yarn, a winding device with a creel, a yarn cross-winding device for producing a cheese, a vacuum-chargeable, pivotably seated suction nozzle having a yarn catch element arranged thereon, a device for preparing a yarn for piecing, and a stationary yarn guide device wherein the stationary yarn guide device and the yarn catch element are cooperatively arranged for retrieving the yarn from the cheese and transferring the yarn to the open-end spinning device.

Abstract: A service unit for restarting a spinning operation at work stations (2) of an open-end spinning machine (1) after replacement of a cheese (8) with an empty tube in the winding device of a work station, comprises an auxiliary yarn supply device (21) and a yarn moving device (23) for fixing a new spinning yarn on the tube. The yarn moving device (23) is movable from a resting position (R) entraining the auxiliary yarn (24) to the winding device (4), and, after restarting the spinning operation, for positioning the yarn (7) connected to the auxiliary yarn (24) in a slot created by a tube plate opener (32) of the service unit between one of the tube plates (30) of the winding device (4) and an end of the tube (10). The yarn (7) is subsequently severed by a cutting device (31), and stored intermediately in a storage device (55).

Abstract: A method of operating an open-end spinning device (1) whose spinning rotor (3) is supported with its rotor shaft (4) radially and axially positioned via a magnetic bearing arrangement (5) which comprises two magnetic bearings with spaced permanent magnet pairs (33, 34 and 43, 44), a central position control device (50) with actor coils (32, 42), and a rotor position sensor (51). An output signal (ASLS) of the position sensor (51) is processed in the central position control device (50) such that a coil current (i) initiated by a controller (53) is initially regulated toward zero by negative feedback of an integrator (55).

Abstract: For cleaning of a spinning rotor independently of the support of the spinning rotor, a rotary drive (4) is selectively movable into and out of contact with an outer rotor surface via entraining elements (7) for imparting rotary movement to the spinning rotor (1). The entraining elements (7) are arranged such that radial forces produced by the contact are mutually cancelled. The entraining elements (7) are advantageously attached directly to the electric rotor (9) of the rotary drive (4).

Abstract: An apparatus for controlling the tension of a traveling yarn includes a rake tensioner having stationary and displaceable yarn tensioning elements in engagement with the traveling yarn, and an electrical coil to which electrical current is supplied by a regulating device. The displaceable yam tensioning elements and the electrical coil are disposed on a common pivot lever. The electrical coil is pivotable in an air gap through which magnetic field lines pass. The tension of the traveling yarn is controlled as a function of the current supplied to the electrical coil. The present invention, thusly, improves the control of the tension of the traveling yarn in spinning or bobbin winding machines.

Abstract: A device for starting a work station (2) of a cheese-producing textile machine, in particular after a batch change, wherein the work station (2) has a creel (18) for rotatably holding a bobbin tube (34), a splicing device (13) for connecting yarn ends, and manipulating means (12, 24) for inserting the yarn ends into the splicing device (13). A yarn (28) connected with a feed bobbin (9) is placed into the splicing device (13) by means of a gripper tube (24). The winding station has a device (30) for cutting the yarn (28), and a device (26) for receiving the cut yarn (28). A special suction tube (1) makes possible the transfer of the cut yarn (28) to a second clamping and cutting device (23) arranged in the area of the creel (18).

Abstract: An open-end spinning device with an opening device for opening continuously supplied sliver material by means of a rapidly running opening cylinder, which opening device is arranged in front of a sliver spreading device (78) with cooperating pairs of spreading cylinders. The spreading cylinders (79, 80, 81, 82) comprise flanges that engage into recesses of the opposing spreading cylinder. The spacing between the particular cooperating spreading cylinders (79, 80, 81, 82) can be periodically varied. An unobjectionable opening process with a low speed of the opening cylinder and with a widened opening cylinder can be achieved with the sliver spreading device (78) of the invention which process is associated with a high-precision dosing and high yarn uniformity.

Abstract: A method for producing graduated precision windings on cheeses in an open-end spinning system. The winding ratio is reduced in stages, in increasingly smaller graduations, as the cheese diameter increases during the bobbin travel of the cheese. The graduations do not exceed the value of 0.3 and are each selected such that changes in the crossing angle are within a tolerance range of less than ±0.8°, and the least number of diamonds occurring during the building of the bobbin can be completely filled. The cheeses thusly produced are distinguished by a stable construction, high density with uniform distribution of density over the entire yarn package, and excellent payout properties.

Abstract: A method for producing a cheese, wherein the cheese rotates around its longitudinal axis and the yarn is subjected to a cross-winding movement while being fed to the cheese and wound thereon, and having a crossing angle, a winding angle and a placement distance associated therewith. The method including the steps of controlling the crossing angle and the winding ratio as a function of the cheese diameter during the winding process while controlling the placement distance so that it increases in conjunction with an increasing cheese diameter thereby preventing deformations and improving the production of cheeses. A cheese produced in accordance with the method of the present invention offers advantages for stacking and during transport.