Abstract: A rotor disk for a spinning machine has a hub ring that includes a first carrier and a second carrier, with the hub ring being joined radially externally in a rotationally fixed manner to a thrust ring made of polymer material. The hub ring and the thrust ring are fastened together in a manner allowing them to be detached non-destructively. The first and the second carriers are constructed and are arranged in a mirror image.

Abstract: In the case of a supporting disk for a supporting disk bearing for open-end spinning rotors, the front side is provided with signal generators for the purpose of non-contact revolution counting, which function by means of magnetic field lines. Preferred are permanent magnetic pins which fit into the supporting disk, and which create an induction current. Single magnet embodiments include removal of surrounding disk material to mechanically balance the disk.

Abstract: At least one circular ridge, which projects upwardly beyond the surface of the navel of the thread delivery device, is placed in the path of yarn being removed from the peripheral wall of the spinning chamber and delivered to the throat of the navel. The ridge has a height of at least 0.003" and is radially so located in proximity to the edge of the navel that the yarn being formed and lifted from the wall of the spinning chamber first engages the navel at the ridge.

Abstract: An open-end rotor spinning machine includes open-end spinning apparatuses each having a rotor housing, a spinning rotor revolving at high rpm in the rotor housing, and a yarn draw-off device extending into the spinning rotor. A cooling device includes a channel plate closing the rotor housing in an operating state. The channel plate has double walls defining a cooling chamber therebetween surrounding the yarn draw-off device. Connection sleeves connect the cooling chamber to a coolant loop.

Abstract: A pneumatic debris aspirating device adapted to be retrofitted on open-end spinning frames originally designed for a mechanical debris disposal installation utilizes an asymmetrical debris pickup funnel which can be connected via a connector conduit to a source of suction which is part of the spinning mill. The debris aspirating device is embodied and disposed such that opening of a cover to each rotor spinning unit is not hampered.

Abstract: In preparation of the piecing process in an open-end rotor spinning device, negative pressure is first applied in a housing containing the spinning rotor, and the rotor cover is brought from its operating position into a fiber evacuation position in which it is lifted off from the housing. Fiber feeding is then switched on. The fiber stream produced thereby, together with the air stream which conveys the fibers is deflected and is evacuated by means of the negative pressure prevailing in the housing over the open rotor edge from the interior of the rotor and from the housing, until the rotor cover is brought back into its operating position to convey fibers to the fiber collection groove.

Abstract: A method of spinning-in yarn on open-end spinning machines in which an interruption of the spinning process is followed by the stop of the feed of the sliver (4) into the singling-out device (2) whose combing roller (22) keeps turning, and the rotor is stopped at least during its cleaning. When the rotor (1) has re-started the yarn end is returned to it and brought into contact with the newly formed fiber band. Prior to the re-starting of the rotor (1) and at the latest simultaneously with the start of the feed device (3) of the sliver (4), the surface of the combing roller (22) is acted upon by a pressure air stream acting in the sense of rotation of the combing roller (22) between the place of supply of the sliver (4) to the combing roller (22) and the mouth of the fiber feed channel (212) to the rotor (1) so as to remove from the clothing (221) of the combing roller (22) fibers and sticking impurities. The invention also relates to a device for carrying out the method.

Abstract: A yarn withdrawal navel for an open-end spinning apparatus is provided with a ferromagnetic locating surface. This is used for the purpose of coupling to a mounting, which has at least one permanent magnet. The yarn withdrawal navel and the mounting have abutment surfaces which are configured to vary the magnetic mounting effect on the navel as a function of the relative rotation position of the navel and the mounting.

Abstract: An open-end spinning apparatus in a spinning machine for continuous spinning of textile fibers includes a spinning rotor having an axis. A cap covers the spinning rotor and is pivotably supported about a pivot axis oriented at right angles to the rotor axis. Delivery and opening devices are disposed in the cap for supplying textile fibers to the spinning rotor. A stationarily installed shaft extends longitudinally of the spinning machine for driving a multiplicity of opening devices. A worm transmission drives at least the opening device and has a driving worm on the stationarily installed shaft and a worm wheel with teeth on a drive shaft of the opening device. The worm wheel meshes with and plunges into the driving worm upon closure of the cap. The driving worm includes at least one thread having adjacent windings with end surfaces and with lateral surfaces having an additional shaping tapering the end surfaces to a point.

Abstract: A spindle for gas bearing of a rapidly rotating tool, in particular for aerostatic bearing arrangement of an open-end spinning rotor, including a spindle housing, a rotatable elongate shaft supported in the spindle housing in a radial direction of the shaft by a radial gas bearing element and an elongate extension rod. The rotor is coupled to the extension rod at a first end thereof. An extension rod bearing element is arranged at a region proximate the first end of the extension rod at which the rotor is attached. A first bearing clearance is defined between the radial bearing element and the shaft and a second bearing clearance is defined between the extension rod and the extension rod bearing element which is at least twice the first bearing clearance.

Abstract: In a method for manufacturing a twisted yarn a spindle rotor is positioned in a stationary cylinder housing. At least two spinning devices are supported in a receiving chamber of the spindle rotor such that the spinning devices are located adjacent to one another and symmetrical to the central axis of the spindle rotor. A vacuum is generated within the receiving chamber. Dissolved fiber material is supplied from a fiber supply device to the hollow spindle axle of the spindle rotor. The individual fiber material is fed by the vacuum within the receiving chamber via the hollow spindle axle 6 of the spindle rotor 7 and via feed channels, connecting the hollow spindle axle to the spinning rotors, to the spinning devices. From the dissolved fiber materials spun yarns are spun in each one of the spinning devices. The spun yarns are gathered as a twisted yarn at a centering point positioned on the extension of the central axis of the spindle rotor. The twisted yarn is wound onto a spool.

Abstract: In a method for manufacturing a twisted yarn by an integrated spinning-twisting process a vacuum is generated within the spindle rotor. Individual staple fibers are fed by vacuum to at least two rotor spinning devices positioned within the spindle rotor in which individual spun yarns are spun from the individual staple fibers. The individual spun yarns are gathered and guided in a first direction through the spindle rotor in order to subject the individual spun yarns to a first twist. The twisted yarn is guided in a second direction counter to the first direction to a centering element positioned above the rotor spinning devices whereby the twisted yarn forms a rotating yarn balloon about the spindle rotor. The twisted yarn is then wound onto a bobbin.

Abstract: In a method for joining a thread a spindle rotor with hollow spindle shaft is rotatably supported on a machine frame. A radially outwardly extending yarn guide channel is connected to the hollow spindle shaft. Two spinning devices with upwardly open spinning rotors are supported above the spindle rotor symmetrical to the central axis of the spindle rotor. A centering point is positioned on an extension of the central axis of the spindle rotor. A spun yarn is spun in each spinning device from dissolved fiber material and led upwardly away from the spinning rotors, reversed in their direction of movement by 180.degree., and introduced into the hollow spindle axle. The spun yarns form a yarn balloon between the yarn guide channel and the centering point, and twisted yarn is removed from the centering point. The dissolved fiber material is fed to the spinning devices through the yarn balloon.

Abstract: A magnetic bearing is disclosed for an open-end spinning rotor having a shaft supported in a wedge-like gap formed between at least one pair of support rollers. The bearing comprises a housing for receiving the shaft, a magnet disposed in the housing to extend radially relative to the shaft, and a magnet disposed on and radially extending from the shaft axially adjacent and at a spacing from the magnet in the bearing housing. The magnets have respective poles of the same magnetic orientation disposed to face and thereby repel one another. According to the invention, a coupling connects the shaft and the magnet disposed on the shaft, the coupling being releasable in response to an axial force exerted on the shaft.

Abstract: A method and system for maintaining spinning machines having a plurality of spinning stations include automatically positioning a maintenance unit proximate to the spinning stations for removing spinning components from the spinning stations and replacing the removed spinning components with replacement spinning components. The maintenance unit is configured to remove the spinning component from the spinning station for servicing, to immediately replace the removed spinning component with a replacement spinning component which is carried by the maintenance unit, and to transfer the removed spinning component to a remote service station. The removed spinning component is serviced at the service station and is subsequently picked up by the maintenance unit for subsequent installation into another spinning station.

Abstract: A device for producing a twisted yarn has a spindle rotor with a hollow spindle axle connected to a vacuum source and also has a vacuum chamber connected to the hollow spindle axle. A fiber-dissolving device for producing individual staple fibers is provided. At least two spinning rotors are positioned in the vacuum chamber for spinning spun yarns from the individual staple fibers. A centering device is positioned above the spinning rotors on the axis of the hollow spindle axle. The spindle rotor has an annular channel for receiving the individual staple fibers from the fiber-dissolving device. The spindle rotor has supply channels connected between the annular channel and the spinning rotors for supplying the individual staple fibers from the annular channel to the spinning rotors. The spindle rotor has spun yarn removal channels for removing the spun yarns from the spinning rotors and for guiding the spun yarns to the centering device.

Abstract: The instant invention relates to a device for the feeding of fibers (51) to the fiber collection groove (23) of an open-end spinning rotor (2). The latter is covered by a rotor cover (3) whose side toward the spinning rotor (2) contains a fiber guiding element (8) the inner circumferential surface (12) of which, in form of a fiber guiding surface, forms a divergence angle (W1) widening in the direction of the spinning rotor (2). The fiber guiding element (8) extends coaxially into the spinning rotor (2). A fiber feeding channel (14) lets out tangentially into its inner circumferential surface (12).

Abstract: Bearing arrangement for an open-end spinning machine has a bearing block attached to bearing supports defined on the machine frame. A seat is defined in the bearing block for receipt of an axial bearing. An intermediate support structure member is removably attached to the bearing block and supporting ring bearings. The intermediate support structure is removable from the bearing block with the supporting ring bearings while the bearing block remains attached to the machine frame through bearing supports.

Abstract: An opener device in an open-end spinning machine includes an opener roller driven by a drive disk and a drive belt. A tension roller is movable between a first position wherein it exerts a driving tension force on the drive belt, and a second position wherein the tension roller exerts a lesser tension on the drive belt so that the drive belt can be removed from the device. A braking device includes a movable actuating element and a braking belt contacting member, such as a bolt, associated with the actuating element so as to be moved thereby. The actuating element and braking belt contacting member are movable between a first position wherein the braking belt contacting member is at a distance from the drive belt and a second position wherein the braking belt contacting member comes into the contact with the drive belt forcing the belt away from the drive disk.

Abstract: An open-end spinning device has a spinning rotor with a rotor pot defining a fiber collection groove therein. A rotor shaft is provided having a diameter between 5.5 mm and 9 mm. Pairs of rotatable supporting rings supported on axles define a nip therebetween. The rotor shaft is rotatably supported in the nip. The supporting rings have a diameter between 62 mm and 82 mm. A thrust imparting device imparts an axial thrust to the rotor shaft in the direction opposite the rotor pot. A non-contacting axial bearing is disposed opposite the free end of the rotor shaft for absorbing the axial thrust without contacting the rotor shaft. The axial thrust imparting device generates an axial thrust between 1N and 7N on the rotor shaft. A driving device contacts the rotor shaft for rotatably driving the rotor and has a contact pressure with the rotor shaft from between 8N and 39N.

Abstract: In the case of a method for closed-loop controlling the revolutions of an open-end spinning rotor during automatic piecing, the spinning rotor is run up to its operating speed from a standstill by being coupled to a tangential drive belt, which runs at operating speed. The spinning rotor thereby passes through a suitable speed range for piecing, and is kept at this speed range for a predetermined time span by changes in the driving effect of the tangential drive belt. This occurs in that the revolutions of the spinning rotor are measured, and dependent on these readings, the revolutions are closed-loop controlled by device of reducing and increasing the driving effect, for example by device of intermittent activating of the rotor brake.

Abstract: Apparatus for supplying conditioned air to spinning machines which includes a duct for transporting conditioned air to the machine, such duct having an opening through which the conditioned air exits the duct. An air diffuser is mounted on the duct adjacent the opening therein, and it includes a generally V-shaped air directing wall that has upper flanges extending outwardly therefrom, with openings in such flanges, whereby a minor portion of the conditioned air flows upwardly through the openings in the flange and is directed toward the open end spinning machine, and a major portion of the conditioned air is directed outwardly toward the sliver being fed to the machine.

Abstract: A device for an open-end spinning machine is disclosed having a drive and a bearing for a shaft-less spinning rotor that forms the rotor of an axial field motor. The device has a stator with a hollow, cylindrical core, a multiphase winding, and a combined magnetic/gas bearing. The bearing has gas outlet bores in an axial, plane-parallel bearing face providing for gas distribution symmetrically about the axis, and there are holding and centering magnets centered in the bearing face. The housings of the stator and the bearing are combined into a one-piece stator housing in which are formed the device for cooling, the gas distribution device, holders for spring and clamping elements of the stator housing suspension, and a support for a sensor plate. The housing also integrates a yoke plate of the bearing and connections for supply lines. A gas chamber therein is closed off on the open side by a gas bearing cover.

Abstract: An open-end spinning machine has spinning stations and a magnetic and gas bearing with a stator at each of the spinning stations. A shaftless spinning rotor being electrically drivable with a single motor includes a series of spinning cups with different properties at each of the spinning stations for receiving fibers to be spun, and an electric rotor at each of the spinning stations forming an axial field motor with the magnetic and gas bearing and the stator. The spinning cups and the electric rotor have axially opposing end surfaces, and the end surfaces of the electric rotor and of one of the spinning cups at a time are coupled together to form a functionally appropriately releasable connection as a structural unit at each of the spinning stations.

Abstract: In the recess of a housing (4) of an open-end spinning device containing a driven opener roller (40), an insertion piece (32) is provided which contains the first channel part (30) of a fiber feeding channel. The insertion piece (32) is installed in housing (4) by an elastic retaining element in such a manner as to be replaceable. The retaining element may be part of a catch and be formed for this purpose by a ring or pot-like insert (43) which lines the interior of the housing (4) containing the opener roller (40) and which has technologically necessary openings (430, 432, 431) in its circumferential wall. The edges of the lateral walls of the first channel part (30) towards the ring or pot-shaped insert are adapted to the curvature of the insert (43). These lateral walls extend, relative to a perpendicular dropped from the center of the insert (43) on the longitudinal axis of the insertion piece (32), up to the side of the perpendicular (323) away from the spinning element (10).

Abstract: A disk for use in a bearing assembly of an open end spinning machine having four disks arranged in two pairs and which operate at up to 15,000 RPM's while the rotor shaft turns at up to 125,000 RPM's. The disk pairs are arranged to form a wedge shaped gap supporting the shaft of a spinning rotor for rotation. Each disk comprises a metallic hub which mounts a synthetic ring. The synthetic ring has a spinning rotor contact surface comprising a shoulder arranged atop a helically disposed rib which extends around and across the contact surface. The shoulder imparts an axial thrust against the spinning rotor during operation of the spinning machine.

Abstract: A shaftless spinning rotor for an open-end spinning machine advantageously protects the rotational bearing components in a combined magnetic-gas bearing management by utilizing a concentric magnet arrangement for the generation of a magnetic field for guiding the rotor relative to the stator, wherein a first dynamically balanced magnet unit projects from one of two opposed bearing faces on the rotor and the stator and a corresponding dynamically balanced magnet unit is recessed in the opposite bearing surface, the magnet units being dimensioned to produce an axial as well as a radial air gap therebetween. Air nozzles for producing the gas bearing open into the recessed area. The air gap in the area of the central axis can be embodied to be wider than the air gap between the opposed bearing faces.

Abstract: A rotor spinning apparatus includes a support frame stationarily disposed on a frame of a spinning machine. A bearing is disposed on the support frame. A spinning rotor is disposed on the bearing and has a rotor axis and a rotor opening. A rotor housing surrounds the spinning rotor. A lid element is rotatably supported about a pivot axis. The pivot axis is oriented orthogonally to the rotor axis and is disposed approximately vertically beneath the rotor opening. The lid element covers the rotor housing and has a sliver feed roller, an opening roller, a fiber guide channel plunging into the rotor opening, a yarn draw-off opening, and a dirt separator.

Abstract: In order to improve the smoothness of operation of a shaftless spinning rotor embodied as the rotor of an axial field motor wherein the rotor is supported by a magnetic gas bearing, a guide magnet arrangement for generating a magnetic guiding field is decoupled mechanically from the drive component of the stator. To that end, separate magnet and stator components are connected to one another by means having both elastic and damping properties, e.g., rubber. This mechanical decoupling makes it possible for the separate components to execute vibration independently of one another and for vibration to be transmitted from one component to another only in highly attenuated form. Hence, machine vibration can substantially be prevented from affecting the smoothness of rotor operation. Tangential forces generated by harmonics and radial forces caused by magnetic or mechanical asymmetries can likewise be absorbed by the stator, with an attendant improvement in smoothness of rotor operation.

Abstract: A drive for a shaftless spinning rotor wherein the spinning rotor is embodied as the rotor of an axial field motor utilizes axially opposed yoke-forming, magnetically conductive elements disposed respectively on the opposite sides of an air gap formed between the spinning rotor and the stator in combination with at least one magnet (preferably either permanent magnets or electromagnets) on one or both the rotor and stator arranged concentrically to one another and to the rotor axis. The present magnet/yoke arrangement does not require exact mutual alignment of oppositely located magnets nor their homogeneous polarization. The present arrangement is self-adjusting because of the generation of a point-symmetrical field which in operation forms a sort of magnetic potential depression. Magnetic drive and guide fields are advantageously decoupled in order to reduce their mutual interference.

Abstract: To attach spinning rotors to their rotor shaft, the rotor shaft is provided with a stop against which the collar for the seating of the spinning rotor bears. The stop can be made in one piece with the rotor shaft, and be in the form of a micro-stop against which the collar bears in an axial direction.

Abstract: An open-end spinning machine having a spinning rotor attached to a shaft is provided wherein the shaft of the spinning rotor is driven by driving means. The shaft of the spinning rotor is held in the nips of pairs of rearward and forward supporting disks. During spinning operations, an axial force is generated in the axial direction of the free end of the rotor shaft. The open-end spinning device further comprises a radial support surrounding at least a portion of the circumference of the rotor shaft and disposed at least in part in the area between the free end of the shaft and the area of the shaft acted upon by the rearward pair of disks.

Abstract: A supporting disk for the supporting disk bearing arrangement of an open-end spinning rotor comprises a base body and a ring-shaped fitting, whose outer circumference serves as a bearing surface for a shaft of the open-end spinning rotor. The base body has a supporting ring, the fitting being joined to its outer circumference. The fitting and the supporting ring are each made of plastic. The modulus of elasticity of the plastic of the supporting ring is at least ten times that of the modulus of the plastic of the fitting.

Abstract: In the case of a supporting disk for a supporting disk bearing for open-end spinning rotors, the front side is provided with signal generators for the purpose of non-contact revolution counting, which function by magnetic field lines. Preferred are permanent magnetic pins which fit into the supporting disk, and which create an induction current.

Abstract: In a method of manufacturing a twisted yarn a rotor is rotatably supported on a machine frame. A yarn guide channel extends radially within the rotor over at least a portion of its diameter. A centering eye for the twisted yarn is positioned on the extension of the rotor axis. A yarn guide tube is arranged so as to guide a yarn exiting from the yarn guide channel to the centering eye. A spinning device is rotatably supported on the rotor eccentrically relative to the rotor axis. A fiber strand is dissolved into dissolved fiber material and fed axially through the rotor and upwardly toward the spinning device where at least two spun fibers are produced. The spun fibers are downwardly guided toward the yarn guide channel so as to form a plied yarn. Along this path the spun fibers are subjected to a first twist to form a once twisted yarn by the rotation of the spinning device relative to the rotor.

Abstract: In pneumatic feeding of fibers (20) to the fiber collection surface of an open-end spinning element, the air which circles together with the opener roller (10) and is conveyed past the inlet opening (40) of the fiber feeding channel (4) is fed back to the fiber feeding channel (4). In this process, the air is conveyed in the circumferential area of the housing (1) between the inlet opening (40) of the fiber feeding channel (4) and the feeding point (21) of the fiber sliver (2) to the opener roller (10) to at least one end of the opener roller (10) and is then fed back along this (at least one) end of the opener roller (10) to the inlet area of the fiber feeding channel (4).

Abstract: An open-end spinning apparatus includes a feed device for supplying sliver; a device downstream of the feed device for separating the sliver into individual fibers; a fiber guide channel downstream of the fiber separating device for pneumatically transferring the individual fibers; a spinning rotor downstream of the fiber guide channel for rotating in a given direction and receiving the individual fibers, the spinning rotor having a fiber slide wall with a given radius of curvature; and a lid closing the spinning rotor and having a centrally disposed yarn draw-off tube and a lid extension. The fiber guide channel has an end region extending in the lid extension and being curved in the given direction. The end region has an orifice region disposed in the lid extension. The orifice region is a curved channel segment being closed on all sides and terminating in a small orifice, and the orifice region has a radius of curvature being matched to the given radius of curvature.

Abstract: An open-end spinning device (1) of the type having a sliver opening device (30) and a pneumatically operated debris removal device (34) is disclosed. The opening cylinder housing (11) of the sliver opening device (30) has a debris discharge opening (15) and a cover element (9) mounted for restricted pivoting movement on a pivot shaft (10). A debris collecting element (16) is affixed to the cover element at a spacing (33) beneath the debris discharge opening and is connected to a suction device (8) which is a part of the spinning machine. The clear space (33) between the debris discharge opening (15) and the debris collecting element (16) assures that an auxiliary air flow (29), which is effective in the area of the debris discharge opening (15) to control the transport of fibers for the spinning process, is not affected by a suction air flow (28) applied at the debris collecting element (16).

Abstract: In a method and apparatus for manufacturing a yarn from fiber material at least two spinning devices arranged adjacent to one another are provided. Fiber material is dissolved and fed to the at least two spinning devices. Each spinning device generates an individual spun fiber. The individual spun fibers are combined at the inlet opening of a hollow spindle axis to form a yarn. The yarn undergoes a two-for-one twisting operation by being passed in a first yarn feeding direction through the hollow spindle axis to an outlet opening of the hollow spindle axis, then radially guided from the outlet opening, and guided in a second yarn feeding direction counter to the first yarn feeding direction to form a yarn balloon rotating in a direction of rotation about the at least two spinning devices. A centering element is arranged on an axis extending along the hollow spindle axle so as to be spaced from the inlet opening of the hollow spindle axle.

Abstract: A housing encloses a rotor, an opening roller, and a conduit communicating between the rotor and opening roller for the feeding of fiber from the opening roller to the rotor. The housing forms a trash removal chamber below the opening roller into which trash is discharged toward the bottom of the chamber during operation of the opening roller; the area of the opening roller where the trash is discharged is the trash outlet opening. The rotation of the opening roller creates an air flow draft in the direction of rotation. This air flow draft, taken in combination with suction applied in the rotor of the open-end spinning unit, creates an air flow suction draft from the chamber through the conduit in the direction of the opening roller rotation. An air flow is provided in the trash removal chamber in and from the chamber in a direction counter to the direction of the air flow draft rotating with the opening roller in the region of the trash outlet opening.

Abstract: An open-end spinning machine having a spinning rotor attached to a shaft is provided wherein the shaft of the spinning rotor is driven by a driving device. The shaft of the spinning rotor is held in the nips of pairs of rearward and forward supporting disks. During spinning operations, an axial force is generated in the axial direction of the free end of the rotor shaft. The open-end spinning device further comprises a radial support surrounding at least a portion of the circumference of the rotor shaft and disposed at least in part in the area between the free end of the shaft and the area of the shaft acted upon by the rearward pair of disks.

Abstract: An open-end spinning machine with a machine frame with at least one section. The latter is provided for each longitudinal machine side with a rigid structural unit which consists of several longitudinal structural elements and two end walls. Intermediate walls are provided at least between two adjoining pairs of spinning stations. These intermediate walls are rigidly connected to the longitudinal structural elements as are the intermediate walls, whereby the groups of technological spinning elements, including the parts of drive units and the winding mechanisms are attached to longitudinal structural elements and/or to the intermediate walls. The end walls of the two structural units are connected to each other in pairs.

Abstract: A bearing setup is provided for the supporting disks of an open-end spinning machine, the supporting disks being supportively fixed on the ends of a shaft extending through a bearing sleeve of a supporting disk bearing. The bearing setup includes a fastening system configured with the bearing sleeve so that the supporting disk bearing can be readily and easily removed from the pillow block of the spinning machine without disassembly of the pillow block from the machine frame. The fastening system may include a threaded bore defined in the axial sleeve for engagement with a threaded screw member extending through the pillow block.

Abstract: A supporting disk for a supporting disk bearing arrangement for open-end spinning rotors is provided with a disk-shaped basic body as well as an outer ring anchored to it. The circumference of the outer ring is constructed as a running surface for a shaft of an open-end spinning rotor. The outer ring and the basic body are made of plastic material. The outer circumference of the basic body and the inner circumference of the ring are provided with a surrounding undercut-type profiling respectively which engage in a form-locking manner and which are designed as a projection on the ring and as a recess on the basic body. The non-cut profiling is achieved by manufacturing the outer ring in a first tool and subsequently placing the ring in a second tool. The basic body is injection-molded to the outer ring on this second tool.

Abstract: In a textile machine, the machine frame is provided with frame walls made of sheet metal, each of which being made as a bearing element. For this purpose the frame walls are provided with 90 degree offset edges and are connected by combined plug-in and screw connections to connection elements and via the latter to at least one additional frame wall and receive structural and function elements by additional combined plug-in and screw connections.

Abstract: The present invention provides a process and device for the reduction of energy consumption in operating spinning elements in driving spinning rotors of open-spinning machines or the spindle drive of ring spinning machine or the roving frame. It is the object of the invention to constantly keep energy consumption in the operation of spinning element at a minimum. Contact pressure between each spinning element and the indirect driving device is adjusted as a function of the momentary difference between the rotational speed of the spinning element and of its driving device in stationary operation while rotational speeds only nominally change, so that the slippage between indirect driving device and spinning element remains constant in time.

Abstract: A sliver opening and fiber feeding device for opening a sliver into individual fibers and feeding the individual fibers to the rotor of an open end spinning machine is provided with a polytetrafluoroethylene coating for the interior surface of the housing of the sliver feeding and opening device, in particular, the trash discharge passage. The polytetrafluoroethylene coating advantageously has a relatively low co-efficient of friction to thereby reduce the affinity of sticky material, which may be present in the sliver due to the presence of insect residue or the like, to stick to the interior surfaces of the device. The polytetrafluoroethylene coating is included on an insert element mounted in the discharge passage, with the insert element being capable of being retrofitted in an existing sliver opening and fiber feeding device.

Abstract: A supporting disk for a flywheel of an open-end spinning machine, comprising a hub ring (1) and a support ring (3) made of elastomer material and affixed to the outer surface of the hub ring. The hub ring (1) consists of a polymer material with a modulus of elasticity of 7000 to 13000N/mm.sup.2, a dimensional stability to heat from 150.degree. to 250.degree. C., as well as an elongation at break of 1.3 to 3%.

Abstract: A rotor support shaft for an open-end spinning rotor assembly is disclosed which is equipped on its free end with a supporting element which forms an essentially radially extending supporting surface for a vibrating ball of a step bearing. The supporting element is made of a material, preferably for a ceramic material, which has a higher hardness than steel. The supporting element is arranged in a receiving device concentric with respect to the axis of the shaft in such a manner that the supporting surface projects slightly from the front face of the shaft.

Abstract: In an open-end spinning machine is provided with a plurality of spinning stations installed next to each other. Each station having a spinning element part of a drive unit, and an opener unit contained in several assemblies. A plurality of longitudinal structure elements are provided to which the assemblies of the spinning device are attached. The longitudinal structural elements are interconnected by transversal bracing. The transversal bracing may be an intermediate wall.