Abstract: A yarn guide imparts a traversing motion to a yarn being delivered to a rotationally driven takeup bobbin in a textile yarn winding operation to create a cross-wound bobbin, or cheese. The yarn guide includes a fork-like yarn guide pivoted about a pivot axis substantially perpendicular to the axis of the takeup bobbin, and an electromagnetic mechanism for driving the guide. The electromagnetic mechanism includes an air gap, a plurality of magnets disposed along the air gap, a plurality of yokes and at least one electrical coil extending into and moveable along the air gap with the traversing yarn guide. The magnets are disposed along the air gap and generate magnetic field lines which extend in a substantially perpendicular direction through the air gap.

Abstract: Random wound yarn packages are produced at a winding station of a winding machine having a friction roller for driving the yarn package being wound by: winding yarn onto an initially empty bobbin core with the friction roller to form a finished random wound yarn package; and, during the winding, continuously (i) detecting with sensors a value representative of the angular velocity of the yarn package and a value representative of the angular velocity of the friction roller, and (ii) calculating a value representative of yarn application of the yarn package being wound, which is indicative of yarn package quality, based on the detected values. The yarn application value can be calculated based on a number of revolutions of the yarn package or based on a winding time of the winding process, and the yarn application values can be recorded as a function of time for later reference or display.

Abstract: A yarn-connecting device for a cheese-producing textile machine having a pneumatic splicing device (22) located outside of the normal travel path of the yarn, a gripper tube (25) acted upon by suction air for manipulating yarn ends to be spliced, and a pivotable gripper tube flap (18) for closing the gripper tube mouth (27). A control crank (33) is arranged at an upper end position (II) of the gripper tube (25) for acting on the gripper tube flap (18) such that in the course of pivoting the gripper tube (25) into the position (II), the gripper tube flap (18) is lifted slightly off the gripper tube mouth (27), while the gripper tube flap (18) always closes the gripper tube mouth (27) when the gripper tube (25) is pivoted out of the position (II).

Abstract: An open-end spinning frame (1) having a spinning rotor (3), whose rotor shaft (4) is supported, free of axial thrust, in the bearing wedge of a support disk bearing arrangement (5) and is fixed in place by means of a magnetic axial bearing (18). The axial bearing (18) has a stationary magnetic bearing component (27) fixed on the bearing housing (26), and a rotating magnetic bearing component (44) arranged at the end of the rotor shaft and having at least two annular shoulders (46) defined by recesses (47) in the rotor shaft (4). The sharpness of the annular shoulders (46) is reduced in the area between their outer circumference (58) and the adjoining radial faces (50) of each annular shoulder, e.g., via curved or beveled surfaces in such area, and the base surfaces (49) of the recesses (47) are each connected via rounded sections (51) with the radial faces (50) of the adjoining annular shoulders (46).

Abstract: A spinning rotor for an open-end spinning frame has a coating of a non-ferrous metal with hard material granules embedded therein, which is applied to the surface of the base material (12), in particular a nickel layer with diamond granules, wherein the coating is comprised of at least two layers (7, 10) containing hard material granules, and an intermediate layer (9) free of hard material granules between the layers (7, 10) containing hard material granules. In case of a separation in places of the wear protection layer, such as can be caused by a scraper in the course of cleaning the spinning rotor, wear protection and spinning properties at the damaged places of the spinning rotor are preserved. As a result, it is possible to prevent a considerable shortening of the service life of the spinning rotor.

Abstract: A method for operating an automatic cheese winder, having multiple winding stations (A, B, etc.) and a transportation system (21) for supplying the winding stations with spinning cops (39) and discharging them of empty tubes (40). The spinning cops are furnished by a preceding textile machine (30) having a spinning cop and empty tube transport device (31) communicating with the transportation system (21). The delivery of spinning cops to the winder (25) is continuously monitored by a sensor. A control device (46) of a tube monitor (24) assures that empty tube-equipped transport trays are kept on hand in the transportation system, and the tube monitor via the central control unit (27) initiates a controlled slow-down of the winder (25) into an energy-saving mode. Upon resumption of delivery of the spinning cops, the winder is accelerated from the energy-saving mode to an operating mode.

Abstract: A conduit plate adapter (10) for an open-end spinning device (1) which device comprises a vacuum-loadable rotor housing (2) which can be sealed by a cover element (5) and which device comprises a spinning rotor (3) rotating at high speed in the rotor housing (2). The replaceable conduit plate adapter (10) is arranged in a receptacle (7) of the cover element (5) and comprises, as is customary, the mouth area (32) of a fiber guide conduit (12) as well as a yarn withdrawal nozzle (11). The fiber guide conduit section running inside the conduit plate adapter (10) has an entrance opening (28) with a non-circular cross section in the area of the conical contact surface (19) of the conduit plate adapter (10).

Abstract: In a multi-station cheese-producing textile machine (1) for rewinding delivery bobbins (4) of large volume, each work position (2) has a manipulating and transport installation (3) by which delivery bobbins (4) are transferred from a loading position (I) to a winding position (III). Each manipulating and transporting arrangement (3) has a horizontally arranged transport unit (5), and an essentially vertically arranged transport unit (6). Transport elements (9′, 9″) for receiving delivery bobbins (4, 4′, etc.) are arranged on the transport units (5, 6) in a definitively shiftable manner for transfer between one transport unit (5) and the other transport unit (6).

Abstract: A device (6) for holding and centering yam tubes (3) for processing while in a vertical orientation on transport disks (2), e.g., for removing a yam remnant (4) at a tube cleaning station. During such processing, the tubes are fixed in place by means of a height-displaceable centering arbor (12) coupled with a circuit arrangement which causes the operating height (h) of the centering arbor (12) to be automatically matched to the length of the respectively provided tube (3). An arresting arrangement (20) assure that the centering arbor (12) is securely fixed in place at each of its operating heights (h).

Abstract: A service unit (16) for a cheese-producing textile machine (1), in particular an open-end spinning machine, has manipulation devices for repairing ordinary yarn breaks, an auxiliary yarn transport device (34) for piecing yarn following a cheese/empty tube exchange, and a control device (24) storing a first program with optimal operating parameters for piecing an ordinary yarn break and a second program setting differing operating parameters for producing a safety piecing following a cheese/empty tube exchange.

Abstract: An open-end spinning arrangement having a yarn withdrawal nozzle (10), by means of which the yarn is withdrawn form its transition zone within the spinning rotor and is rollingly and slidingly deflected while circulating in contact with the yarn withdrawal nozzle, additionally imparting a false twist. The yarn withdrawal nozzle has a depression (24), which is abruptly offset in the circulating direction of the yarn, by which the yarn loses contact with the yarn withdrawal nozzle (10) in the withdrawal direction of the yarn and over an angular area a of at least 10 degrees. Each time the rotating yarn tail sweeps over this depression, the false twist is completely interrupted and the actual twisting of the yarn at the yarn withdrawal nozzle (10) is cancelled.

Abstract: In rotor spinning devices whose rotors are mounted in a support-disk bearing and in which a support disk (1) has openings (5, 9) serving for the contactless measurement of speed for an optical control of a spinning-start carriage, deposits of dirt, especially fine dust, can build up in said openings (5, 9). This impairs the detection of signals. The portion of the inner surface (19) of the openings (6, 9) of a support disk (1) which is located in the direction of the outer edge of the support disk (1) forms such an angle (&agr;) with a line parallel to the axis of rotation (27) that the buildup of deposits of dirt is prevented.

Abstract: A method for operating the winding heads of a bobbin winding machine each of which respectively has a yarn tension sensor connected to a work station computer for detecting the actual tension in a yarn traveling from a delivery bobbin to a take-up bobbin, a yarn tensioner for regulating the yarn tension, a splicing device for automatic connection of yarn ends following a yarn break and/or a yarn cleaning cut, and a delivery bobbin changing device. After a splicing of the broken or cut yarn ends, the actual yarn tension is detected by the yarn tension sensor, and the detected value is compared in the work station computer with a threshold value which, if exceeded, results in actuation of the delivery bobbin changing device to provide a fresh delivery bobbin.

Abstract: A method and a device for winding a spun yarn body from an inside wall of a spinning centrifuge of a pot spinning machine onto a tube (10) introduced for such purpose into the spinning centrifuge. The yarn extending between a yarn guide tube (6) and the inside wall of the spinning centrifuge is caught by lowering the tube past the mouth of the yarn guide tube and the winding process initiated. A remnant of spinning yarn is created thereby between the draw frame and the tube foot. In order to avoid disturbances due to the free end of this remnant of spinning yarn, the remnant of spinning yarn is separated from the yarn body and the tube and subsequently removed by suction.

Abstract: A centrifugal spinning machine having at least one spinning station (10), each of which has one rotatable spinning centrifuge (14), one yarn guide (18) that can be supplied with a fibrous spinning strand (26′), and one drive device (38) for generating an axial motion between the yarn guide (18) and the spinning centrifuge (14). The yarn (26) is guided in the yarn guide (18) to travel through the rotational axis of a rotor 46 of the drive device (38).

Abstract: A transport system for spinning bobbins and bobbin tubes comprises a transport path with two essentially vertical sections and an essentially horizontal section connected therebetween. The spinning bobbins and bobbin tubes are transported on pallets whose foot portion comprises an element consisting of magnetizable material. A conveyor belt runs along the transport path at the back side of which belt stationarily arranged permanent magnets are arranged to exert magnetic forces to hold the pallets on the conveyor belt.

Abstract: A method for the contactless measuring of strand-like yarn material as well as to a device for carrying out the method. Textile material 4is irradiated within a measuring range of at least one ray source 1 and imaged on a sensor range of a receiving device 10 comprising sensor cells 8, 11, 12, 14. The signals generated by the individual sensor cells 8, 11, 12, 14 are converted into measured values for the dimensions of material to be measured 4. The signals of the sensor cells 12, 14 covered only partially by the image of the textile material 4 are taken into account in the measured result in a pro rata manner proportional to the amount of the covering.

Abstract: An open-end spinning device (1) with a forwardly-opening vacuum-loaded rotor housing (2), a high speed spinning rotor (3) rotating in the rotor housing and with a fiber conduit plate (4) for closing the rotor housing. The fiber conduit plate (4) has a replaceable conduit-plate adapter (10) forming the mouth area of a fiber guide conduit and a yarn withdrawal jet. The conduit plate adapter (10) is detachably fixed in a receptacle (7) of the fiber conduit plate (4) only in a frictionally connected manner by means of a magnetic coupling (15) which can be easily and rapidly detached when necessary yet is reliable and exact during operation and assembly.

Abstract: In a method for braking an electric drive motor, especially a drive motor for driving a grooved drum of a winding head of a bobbin winding machine which motor is loaded for braking in a direction opposite to a rated nominal current with a braking current, the instantaneous thermal load of the drive motor is detected and the strength of the brake current is selected as a function of this thermal load of the drive motor.

Abstract: A device for opening slivers (4) for feeding an OE spinning device (3), comprising a sliver feed device defining a sliver clamping position (7), a rotating opening roller (8) having a circumference with spirally extending combing elements (9, 24) for engaging at the clamping position (7) into a sliver being fed by the sliver feed device. In order to improve the opening of the sliver, a support roller (13, 28, 29) also having spirally extending combing elements (14, 24, 25, 26) is arranged in the direction of fiber feeding after the clamping position (7) with its combing elements (14, 24, 25, 26) extending into the intermediate spaces between the spirally extending combing elements (9, 24) of the opening roller (8) and rotates counter to the opening roller (8) for combing sliver therewith in a common effective range (11).