Abstract: A method for improving the monitoring of the fill state of a sliver can (5) at a spinning station of a textile machine processing sliver wherein a defined portion (24 or 124) of a can bottom (22) is initially kept free from sliver (6) while a predetermined amount of sliver (6) is deposited on an adjoining portion (25 or 125) of the can bottom (22) and only after the adjoining portion (25 or 125) is covered with sliver, is the defined portion (24 or 124) covered with sliver (6). The method includes monitoring the defined (24 or 124) portion while the sliver is being drawn out and detecting when the defined portion of the can bottom (22) is uncovered to trigger a signal for exchanging an empty can for a filled sliver can. In one preferred embodiment, a sensor (27) for monitoring the defined portion (24 or 124) and detecting an uncovered can bottom is mounted on a service unit (16) which passes over the spinning stations.

Abstract: An open-end spinning device (1) has a spinning rotor (2) supported by its rotor shaft (3) in the bearing wedges (4, 4') of a supporting plate bearing (5). A rotor brake (12) arranged in the area of the supporting plate bearing (4) has brake elements (13) operable vertically downwardly on the rotor shaft (3). The brake elements (13) of the rotor brake (12) are arranged centered above the respective bearing wedges (4, 4') of the supporting plate bearing (5) and are seated in a box-like component (14) to be linearly displaced in the vertical direction (R).

Abstract: A thrust bearing for an open-end spinning rotor (1) supported by its rotor shaft (2) in the bearing slot of a support-disk bearing arrangement (4). The thrust bearing has a magnetic bearing system (10) or (25) comprising magnetic support elements (12), (13) stationarily arranged on a thrust bearing housing (11) and a rotating magnetic bearing device (14) fastened to rotor shaft (2). Bearing element (15) of magnetic bearing device (14) is releasably connected to rotor shaft (2) via an elastic connection (20), (21) positively supported in corresponding receiving grooves (22), (23) of either the rotor shaft or the magnetic bearing device (14).

Abstract: A method of producing a random wound yarn package includes driving a yarn package with a friction roller, setting and maintaining a constant yarn tension in the yarn, setting and maintaining a constant contact force between the friction roller and the yarn package being driven thereby, and temporarily regulating the yarn tension and the contact force during a time of a pattern winding zone of the winding process in order to maintain a constant winding density both before and during the time of the pattern winding zone. The winding station includes a friction roller for driving the yarn package, a yarn tensioner, a device that generates a constant contact force between the yarn package and the friction roller, and an evaluation and regulation unit that temporarily regulates the yarn tension generated by the yarn tensioner and the contact force generated by the device during the time of the pattern winding zone.

Abstract: An open-end spinning apparatus (1) has a spinning rotor (4) rotating in a vacuum-applied rotor housing (2) closed by a conduit plate (37) with a sliver opening device (51) delivering individualized spinning fibers into the rotor housing through a fiber guide conduit device (14) connecting the sliver opening device (51) to the conduit plate (37). The fiber guide conduit device (14) is replaceably supported in a connection bore (31) of the sliver opening housing (17). The fiber guide conduit device (14) is a cast part comprising a fiber guide conduit body (43) with a position fixing device (34) to assure a given mounting position with respect to the opening housing, a cylindrical foot having a groove (36) receiving an O-ring (35) for sealing with respect to the opening housing, and a contact shoulder (41) to support a hose nozzle (38) for sealing with respect to the conduit plate.

Abstract: A rotor brake (8) has a brake element holder (22) releasably fixed in place on a jaw-like brake lever (9, 10) and a dovetailed retaining slot (26) on its end. A brake element (30), which in cross section (A) has the shape of an equilateral triangle, is held in this dovetailed retaining slot (26). The brake element (30) has three brake surfaces (31, 31', 31"), which can be used alternately.

Abstract: A device for transmitting yarn monitor signals to the control circuit of an open-end spinning station for determining whether a yarn spun by the spinning station is being drawn off or whether the yarn travel has been interrupted so that, in case of a yarn break, the infeed of the sliver into the spinning station is interrupted. Defects in electronic components in the circuit of the yarn monitor or in the sensor can result in a continuous yarn traveling signal to the control circuit of the spinning station despite a yarn break. The present invention therefore provides a receiver (5') for contactless receiving the yarn signal of the monitor and an oscillator (16) which can be actuated and deactuated based on the receiver output signal.

Abstract: A winding unit 2 of an automatic bobbin winder includes a suction nozzle 12 for aspirating from the surface 48 of a take-up bobbin 11 an upper yarn end portion 34 after a yarn break for subsequent placement into a splicing device 13. The suction nozzle 12 has a sensor device 35 for detecting the presence of the aspirated upper yarn and the sensor device is connected to winding unit computer 39. The suction device is connected via a cam transmission 27, 29 to a reversible drive 25 which can be driven by winding-unit computer 39 to cause the mouth 38 of the suction nozzle to execute reciprocatory pitching movements V, Z to assist the nozzle in properly aspirating the upper yarn.

Abstract: In an open-end spinning unit 1 having a pivotably mounted cover element 8 for covering a rotor housing 2 of the spinning unit 1, a sliver opening device is incorporated into the cover element 8. The sliver opening device has an opening cylinder housing 17 fixed to the cover element 8 with an opening cylinder 21 supported by the housing 17 for rotational sliver opening operation. The housing 17 defines a sliver infeed position and a downstream soil discharge opening 28. The opening cylinder housing further includes side walls 43, 44 perpendicular to the axis of the opening cylinder 21, the side walls presenting inner wall surfaces 45 which diverge at least in the area of the soil discharge opening 28 toward respective wall edges 49.

Abstract: The method by which a batch is ended in a spinning machine has an effect on its efficiency. As the rule, the end of a batch is determined according to a preset time, the amount of yarn to be produced, or a preset number of bobbins. In order to end a batch with the greatest possible efficiency, the present invention sets the batch end at a time at which full bobbins have been produced at no greater than 75% of the spinning stations operating in producing the batch. A minimum winding condition to be attained by the bobbins is predetermined prior to the end of the batch. The time still required for attaining the minimum winding condition of the bobbins is determined, and those spinning stations whose bobbins cannot attain the minimum winding condition by the time of the predetermined batch end are shut down.

Abstract: A sliver opening device for an open-end spinning unit (1) with an opening cylinder (21) which rotates in an opening-cylinder housing (17) and comprises a base (29) arranged on a bearing shaft (26) with a replaceable annulus (30) of card-clothing fitted onto the base (29). The annulus (30) is held between an abutment flange (31) of the base (29) and a cover disk (33) of an enlarged diameter. The housing (17) and the cover disk (33) have mating stepped regions (45) at their outer circumferences to enclose and generally seal the housing. A visor-like shield (50) is arranged at a distance in front of the cover disk (33) to protect the cover disk from being touched inadvertently.

Abstract: The invention relates to an open-end spinning device with a rotor housing connected to a source of suction and open at a front side, in which a rotor rotates at relatively high rpm. A cover element is provided for closing the rotor housing and a cover extension is affixed to the cover element as an exchangeable, dynamically balanced component. The cover extension is releasably disposed in a receptacle recessed in the cover element by means of mating inclined seating surfaces and by axially acting fasteners, and is exactly fixed in position inside this receptacle by an alignment pin engaged in aligned bores in the cover element and in the cover extension.

Abstract: For the optimization of the vacuum output of a suction air installation of a textile machine, the vacuum output is adjustably regulated by initially starting a batch with a predetermined vacuum for the vacuum demands under basic operating conditions and additional fluctuating working conditions, counting the errors which cannot be rectified and the attempts to rectify the errors caused by insufficient vacuum during a predetermined time period, subsequently changing the vacuum output of the suction unit during a subsequent time period, comparing the number of errors occurring under the changed vacuum conditions with the number which had occurred in the previous time period, and increasing the vacuum output when the number of errors exceeds a maximum predetermined amount of errors and decreasing the vacuum output when the number of errors is at or less than the maximum predetermined amount of errors.

Abstract: A cop changing and transport system for a composite ring spinning and winding machine wherein both the ring spinning machine and the winding machine have respective transport systems 2 and 3 in which circulate separate respective groups of transport pallets 25 and 26, dedicated to the respective machines. A transfer device 1 is disposed at an adjacent location between the transport systems 2 and 3, and has two adjoining transport disks 8, 9 rotating in the same direction. Cop and tube manipulating devices 42 are respectively disposed on the transport disks 8 and 9 on support columns 39 of a support structure 38, which manipulating devices are positively controlled in the course of the rotation of the transport disks 8 and 9 such that the manipulating devices continuously transfer the spinning cops 59 or the empty tubes 60 from the transport pallets of one transport system to the transport pallets of the other transport system.

Abstract: A suction arrangement for a device for repositioning the reserve winding typically found on cops from a ring spinning machine to prepare the cops for rewinding into larger yarn packages at a bobbin-winding machine. The suction device is connected to a central supply of suction air to aspirate and hold the yarn end until it is re-deposited on the cop, and includes an air flow restrictor plate movable among multiple positions for selectively obstructing the suction air flow to apply respectively different suction forces to the yarn end based on predetermined parameters of the yarn, the cop preparation operation, or the particular winding operation.

Abstract: A sliver feeding device for an open-ended spinning machine (1) wherein sliver is fed to the front of a spinning rotor (44) revolving at high speed in a rotor housing (2), with a pivotable cover element (11) for closing the rotor housing (2) having an integrated sliver opening device (13) with a lateral sliver feeding device embodied as a feeding trough/condenser unit (17). An inlet condenser (28) of this feeding trough/condenser unit (17) has an open sliver guide chute (37) terminating in a condenser funnel (36). The sliver guide chute extends at a rearward inclination around a convexly rounded core area (39) of the inlet condenser. A sliver loop opener (23) is disconnected and arranged at a distance from the cover element (11) so as not to be affected by its pivotal opening movement.

Abstract: A pot spinning machine for forming a spinning cop includes a spinning pot onto an interior of which yarn is deposited to form a spinning cake; a yarn guide which deposits the yarn onto the spinning pot to form the spinning cake; a yarn carrier onto which the yarn is rewound from the spinning cake to form the spinning cop; and a lifting member that engages, moves, and positions the yarn carrier with respect to the spinning pot. The yarn guide comprises a yarn passage defined only by the yarn carrier through which the yarn passes in direct exposure to said yarn carrier for deposit in the spinning pot. A method for forming a spinning cop includes depositing yarn onto an interior of a spinning pot of the pot spinning machine to form a spinning cake; and rewinding the spinning cake onto a yarn carrier to form a spinning cop.

Abstract: So that stray fibers do not become attached to the rotor during a yam piecing process in the spinning box of a rotor spinning machine, the rotor may be cleaned by an air flow generated by drawing air into the rotor by the prevailing spinning vacuum or by blowing compressed air into the rotor through a closable opening in the rotor chamber. To avoid the danger that soiling of the closure of the opening will permit aspiration of secondary air and impair control of the air supply, the closure is formed as a slide member with a leading edge configured for cleaning the opening during closing movement.

Abstract: An apparatus for transporting textile packages in a transport direction along an elongate package supporting surface comprises a guide track extending beneath the elongate supporting surface, an elongated thrust element slidable on the guide track, and an elongated lift element superposed on the thrust element for elevational movement toward and away therefrom via connecting pivot rods. A stop device on the thrust element limits the elevational movement of the lift element between a lowered position disposed beneath the elongate supporting surface and a raised position disposed at a higher elevation than the elongate supporting surface for displacing textile packages off the elongate supporting surface. A drive actuates elevational movement of the lift element and displaces the lift and thrust elements as a unit along the guide track when the lift element is in the raised position for transporting the textile packages displaced by the raised lift element.

Abstract: A method of producing a spinning cop in a pot spinning machine includes depositing yarn from a yarn guide onto an upper location of an interior of a spinning pot of the pot spinning machine to form an upper yarn deposit in the upper location; further depositing yarn from the yarn guide onto an area of the interior of the spinning pot spaced from the upper location to form a spinning cake spaced from the upper yarn deposit; and rewinding the spinning cake onto a tube to form a spinning cop and rewinding the upper yarn deposit onto the tube to form a top winding. Yarn forming the upper yarn deposit has a coarser yarn size than the yarn forming the spinning cake. During yarn deposit to form the upper yarn deposit the yarn guide is moved in one direction without traversing movement, and during yarn deposit to form the spinning cake the yarn guide is moved in one direction with traversing movement. Yarn windings are placed in parallel relation in the upper yarn deposit.