Abstract: An open-end spinning unit, which comprises a spinning rotor 1 that rotates during the spinning operation at a high rotational speed in a closed rotor housing 2. The spinning rotor is rotated by an individual electric motor drive 18 and supported in a smoothly running bearing assembly. When the drive is disconnected and the rotor housing is properly closed by a cover element 8, the spinning rotor is biased and rotated by an airflow resulting from a vacuum prevailing in the rotor housing and the motor drive operates as a generator. At least one of the electric quantities Pv, Gv which develop during the generator operation of the drive 18 is monitored, and upon exceeding a threshold value which can only be attained when the cover element is properly closed, a signal S is generated and processed in a control unit 30 to cause the cover element 8 on the rotor housing 2 to be locked, and thereafter the drive 18 is connected to its electrical supply to rotate the rotor at high speed.

Abstract: An arrangement for an open-end rotor spinning comprises a spinning rotor which is radially supported with a rotatable shaft in a wedge-shaped gap of two supporting disc pairs and axially in a step bearing housing. The shaft can be pulled out from its support from the operator's side of the arrangement and inserted again into the support. For the purpose of cleaning the gap between the back supporting disc pair and the front face side of the step bearing housing, a tube is provided having an entry opening at the operator's side of the arrangement and leading to the area of the step bearing housing and aligned against the shaft with an opening.

Abstract: A spinning device comprising a spinning box housing; a spinning rotor having a spinning cup on a rotor shaft; a cover element; a traveling belt acting tangentially on the rotor shaft; a rotor brake; a pivotable expander roller moveable within a maximum pivot angle via a pressure lever system connected to the brake gear of the rotor brake between an operative position when the spinning box is closed in an inoperative position wherein the expander roller is automatically lifted off the tangential belt and the rotor brake is applied to the rotor shaft when the spinning box is opened; a brake and locking lever having a locking recess in contact with an arresting roller arranged on the cover element; and an arrangement in the pressure lever system for absorbing shock-like forces acting on the expander roller and for preventing the forces from being transmitted to the brake and locking lever.

Abstract: In an arrangement for application in open-end rotor spinning, an opening roller is housed in a swivel housing. The swivel housing can, together with the assembled opening roller, be removed from the arrangement for open-end rotor spinning when the machine is in operation. The opening roller, due to its mass, continues to rotate after it has been separated from the tangential belt which drives it. A locking device is provided which prevents the removal of the swivel housing when the opening roller is rotating. This results in the opening roller being at a standstill when the swivel housing is removed. The risk of injury caused by a still rotating opening roller is eliminated.

Abstract: An open-end spinning arrangement (1) comprises a stationary spinning box housing (2) arranged on a base frame of a textile machine for seating a high speed spinning rotor (7) in a vacuum-charged rotor housing (8), a sliver opening unit (4) connected to the spinning box housing (2) via a linear guide (3), and a cover element (23) for closing the rotor housing (8). The sliver opening unit (4) is releasably connected to a connecting bracket (30) of the linear guide (3), and an opening roller (12) driven by an individual motor and a sliver draw-in cylinder (14) driven by a step motor (15) are arranged inside the sliver opening unit (4).

Abstract: A spinning rotor for open-end spinning machines and a method for balancing the spinning rotor in the course of a single clamping process by removing material from a cylindrical-shaped section of the collar (20) of the rotor cup (19) to form an identification mark (21) thereon sufficiently to offset an imbalance and equalize the mass of the rotor. The mark (21), which preferably consists of a combination of a graphic symbol (22) and lettering (23), is used for identification and information.

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: The spinning rotors of open-end spinning aggregates are supported on supporting discs. For the purposes of non-contact revolution counting, a front side of a supporting disc is provided with at least one permanent magnet. A signal receiver of a maintenance device selectively arrangeable at the spinning aggregates is arranged at the permanent magnet. The distance between the permanent magnet and the signal receiver is bridged by a ferromagnetic information transmitter, which is preferably arranged on a swivelling housing section of the spinning aggregate.

Abstract: An open-end spinning device (1) with a spinning rotor (3) whose rotor cup rotates at a high speed in a vacuum-loaded rotor housing (2) closable by a conduit plate (27). The spinning rotor (3) is supported with its rotor shaft (4) in the bearing nip of a support-disk bearing (5) free of axial thrust and positioned in axial direction by a magnet bearing (18). The direction of rotation (S, Z) of the spinning rotor (3) can be selectively set via the direction of the rotor drive (V or R). The conduit plate (27) comprises a receptacle (34) in which exchangeable conduit-plate adapters (12.sub.S or 12.sub.Z) can be fixed in coordination with the particular direction of rotation (S or Z) of the spinning rotor (3).

Abstract: An open-end spinning device (1) with a spinning rotor (17) which is mounted with its rotor shaft (8) in the V-slots of a support-disk bearing (5) and whose spinning cup (17) rotates at a high speed in a rotor housing (6) which is open to the front and can be loaded by suction. The rotor housing (6) can be closed by a pivotably mounted cover element (10) which comprises a sliver opening device and is arranged so that it can be disengaged if required. The cover element (10) can be attached to the spinning box (2) via a mounting device (20) comprising fork-shaped connecting brackets (22) and pivot bolts (30) rotatably seated in the housing wall (38) of the open-end spinning device (1). If required, the cover element (10) can be easily removed after securing means (32), which are easily accessible, have been loosened.

Abstract: An open-end spinning device (1) with a spinning rotor (17) which is mounted with its rotor shaft (8) in the V-slots of a support-disk bearing (5) and whose spinning cup (17) rotates at a high speed in a rotor housing (6) which is open to the front and can be loaded by suction. The rotor housing (6) can be closed by a pivotably mounted cover element (10) which comprises a sliver opening device and is arranged so that it can be disengaged if required. The cover element (10) comprises a locking and unlocking device (20) with locking bolts (23) which can be controlled in a defined manner and which are movably mounted in bearing brackets (22) of the cover element (10). The locking bolts (23) engage during spinning operation in bearing locations (34) on the spinning box frame (2). The cover element (10) can be readily taken off the spinning box frame (2), if required, by appropriately actuating the locking and unlocking device (20).

Abstract: An open-end spinning device (1) with a spinning rotor (3) whose spinning cup rotates at a high speed in a rotor housing (2) loaded by a vacuum and closed by a yarn guide plate. A fiber guide conduit (14), arranged between a sliver opening device (26) and the spinning cup, has a wall section with an elevated coefficient of friction comprised of conduit sections (29, 30) of different surface roughnesses. The wall of the entrance-side section (29) of the fiber guide conduit has a distinctly greater surface roughness (R.sub.t) than the wall of the exit-side section (30) of the fiber guide conduit.

Abstract: An open-end spinning device having a spinning rotor housed within a rotor housing which includes a yarn conduit plate for closing the front side of the rotor housing and a conduit plate adapter, defining a mouth area of a yarn conduit guide and including a yarn draw-off jet, which is removeably arranged in a receptacle of the yarn conduit plate and is easily and quickly replaced in connection with the replacement of a rotor, while providing a reliable and tight fastening of the conduit plate adapter in the open-end spinning device. The conduit plate adapter comprises an extension including fixing elements which can be secured by a fixing arrangement which is movably arranged for selectively abutting the fixing elements for fixing the conduit plate adapter within the receptacle of the yarn conduit plate.

Abstract: The supporting disks for supporting disk bearings of open-end spinning rotors comprise a tire or ring with damping properties, as well as an essentially cylindrical running surface. In order to avoid heat build-up, the running surface is interrupted by two grooves, thus dividing the running surface into one inner and two outer sectional surfaces. The outer sectional surfaces are each wider than the inner sectional surface by 20 to 40%.

Abstract: A mechanically operating debris removal device for an open-end spinning machine 1 comprises a guide conduit arranged below the spinning units and enclosing a debris conveyor belt. The guide conduit comprises a base and a cover, which may be pivotable or detachable relative to the base. During spinning operation, the base and the cover form an essentially closed belt guide conduit. Debris passage openings are formed in the cover with associated air and debris guide deflectors to communicate with debris exit openings in the sliver opening devices. The upper run of debris conveyor belt creates a slight suction flow in guide conduit and at the debris passage openings to prevent fine debris from settling in the area of the debris passage openings and in the area of debris exit openings of the sliver opening devices.

Abstract: An open-end spinning device comprises a spinning rotor rotating in a vacuum-loaded rotor housing which can be closed by a conduit plate having a receptacle receiving a replaceable conduit-plate adapter and a locking device, e.g., a bar spring, for spring-biasing the conduit-plate adapter into the receptacle. A blocking device comprising a hood-like cover is associated with the locking device for movement into an operating position only when the locking device is positioned in a locking position in which it reliably fixes the conduit-plate adapter.

Abstract: An adaptor is provided for an open-end rotor spinning arrangement, which adaptor is exchangeably arranged on a cover element of a spinning rotor and projects partly into the inside of the spinning rotor. The adaptor comprises the first section of a yarn withdrawal channel, as well as the end section of a fiber feed channel. On its side facing away from the spinning rotor, the adaptor has a bearing surface in the form of a plane ring surface, which by means of an axially effective fixing device is drawn against a take-up surface of the cover element. The circumferential surface of the adaptor is in the form of a cylindrical surface. A centering element, for fixing the adaptor on the take-up surface at an exact angle, is arranged at the fixing device, which centering element is disposed, in relation to the yarn withdrawal channel, almost diametrically opposite to the fixing device.

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 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: 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: The present invention relates to a device for the control of an air stream in an open-end spinning device (6). The open-end spinning device (6) is equipped with an air channel (8) opening into the second housing compartment (600) of the open-end spinning device (6), which is connected via a valve (82) to a connection opening (83). An air channel (95) with a presentation end (950) located on a traveling service carriage (9) can be presented to this connection opening (83). This presentation end (950) is connected by means of a movable intermediate segment (951) to the air channel (95) and is capable of movement relative to same so that when the connection opening (83) is swiveled, it follows this movement without changing its position relative to the connection opening (83).

Abstract: The present invention relates to a device for the conveying of fibers from an opener roller (31) installed in a fixed opener roller housing (30) to the collection surface (43) of a spinning rotor (4) of an open-end spinning device (1). It is provided with a rotor lid mounted on a swivel pin which receives a fiber feeding channel (6). The fiber feeding channel (6) can be brought into contact with a first contact surface (62) surrounding its inlet opening (60) against a second contact surface (35) located on the opener roller housing. It extends until directly in front of the collection surface of the spinning rotor (4). A lid extension extends through an opening in the spinning rotor (4) into the spinning rotor. In the lid extension the fiber feeding channel (6) lets out into the spinning rotor (4). The contact surfaces are essentially tangential to the circumferential surface of the opener roller and parallel to the opening of the spinning rotor or are inclined towards the opening of the spinning rotor.

Abstract: An OE spinning apparatus 1 with a spinning rotor 2 having a hollow shaft 26 supported radially in a wedge-like gap 25 of a support-disk bearing 4 and driven by an individual motor 9 comprising an armature 11 integrated into hollow shaft 26 at its end and a stator 10 fixed to spinning-box housing 12. Pressure roller 8 rotates about axis 24 angled acutely to rotor shaft 3 to urge rotor shaft 3 into the gap 25 and also in the direction of axial bearing 13, which may be a permanent magnet bearing or pneumatic bearing. Spinning apparatus 1 thereby has a high natural frequency, which makes possible very high rotor speeds.

Abstract: The present invention concerns an apparatus, in particular a cover for a rotor (51), for the initiation of the spinning of a thread in an open-end spinning apparatus (1), which apparatus possesses a fiber feed conduit (6) which extends from a disintegrating apparatus (4) to a spin rotor (50), which is installed in a rotor housing (5) in combination with a controllable vacuum source, and which rotor (50) is covered with a rotor cover (51) which also accepts the fiber feed conduit (6), at least partially. The apparatus exhibits further a service wagon (2) for the open-end spinning apparatus (1), which wagon carries a suction line (20) to a connection piece (7) of the open-end spinning apparatus (1). The connection piece (7) is in communication with a connection opening (70) in the fiber feed conduit (6) and is in a break-away sealed connection with the rotor cover (51).

Abstract: A method and device of cleaning the rotor (6) of a rotor spinning machine are provided in which, after the opening of a spinning unit, there are sucked off from the rotor (6) fibres and impurities being released from the inner surface of the rotor by pressure air applied to said inner surface. The cleaning pressure air is led into the rotor (6) in at least two air streams producing in the rotor (6) a symmetrical streaming in one and the same direction and the supplied air, together with the released impurities, is sucked off through the centre of the inlet aperture (63) of the rotor (6).

Abstract: A supporting ring for a supporting ring bearing of the rotor of an open end rotor spinning machine for the optical control of a joining carriage and having at least one reflecting region on an otherwise substantially non-reflecting axial ring surface (2) of the supporting ring (1) facing a light source, wherein one or more cupped receptacles (6) are provided for in the ring surface (2) into which reflectors (3) can be inserted and secured, and wherein an interruption of a rotational motion of the supporting ring (1) about a rotational axis (4a) is optically recognized by the joining carriage to start a joining carriage execution procedure, is characterized in that the depth of a receptacle (6) is larger than the thickness of a reflector (3) which can be placed therein. In this fashion the disadvantages of conventional supporting rings having reflectors can be avoided and optimal reflection can easily be restored at any time after wear of individual reflectors.

Abstract: An open-end spinning device with a forwardly open suctioned rotor housing, a high speed spinning rotor rotatably disposed in the rotor housing, and a fiber conduit plate for closing the forward opening in the rotor housing. The fiber conduit plate has an interchangeably disposed conduit plate adapter defining an opening from a fiber guide conduit into the rotor and a yarn take-off nozzle. The conduit plate adapter can be releasably fixed securely in place in a receptacle area of the fiber conduit plate by means of a central fastening arrangement comprising a threaded connection and a magnetic coupling between the fiber conduit plate and the conduit plate adapter.

Abstract: An adaptor in the form of an exchangeable extension adapted to the dimensions of an open end spinning rotor and in use is detachably connected with a spinning rotor cover. The adaptor comprises the first part of a yarn withdrawal channel as well as the end area of a fiber feed channel. The end area of the fiber feed channel continues the connecting part of the fiber feed channel located outside of the adaptor with a partioning joint. The transition from the connecting piece to the end area of the fiber feed channel is buckle-free or bend free. The end area of the fiber feed channel located in the adaptor has a curved area, which is also buckle-free or bend free. This curved area corresponds to the rotational direction of the spinning rotor and also comprises a component in axial direction of the spinning rotor. The curved area preferably extends with a constant radius over the entire adaptor.

Abstract: A yarn withdrawal nozzle for an open-end rotor spinning machine is provided with at least one ferromagnetic member. The at least one ferromagnetic member serves to couple the yarn withdrawal nozzle to a holding device comprising at least one permanent magnet. The permanent magnet is arranged sunk in a recess. The at least one ferromagnetic member comprises a projection with a diameter of approximately 2 to 3 mm. The projection can be guided into the recess and thus can be positioned to the permanent magnet. The projection serves also as an anti-rotating device.

Abstract: An open-end spinning device has a spinning rotor defining a fiber collection groove between a rotor bottom and an open-end of the spinning rotor. The rotor further includes a wall extending from the fiber collection groove to the open end of generally less than 6.0 mm. A rotor cover has an extension reaching into the interior of the spinning rotor. The extension includes at least a portion of a fiber feeding channel for feeding a fiber and air mixture into the rotor. A feed surface is disposed essentially parallel to a plane through a fiber collection groove into the extension adjacent the fiber feeding channel so that fibers exiting the feeding channel are directed along the feed surface. The feed surface has a radial dimension so that an open radial distance of less than 4.0 mm exists between the feed surface and the wall or fiber collection groove which is directly radially opposite of the feed surface.

Abstract: An open-end spinning unit having a one-piece fiber guide conduit inserted between the opening roller housing and the rotor housing is drawn from a steel tube and embodied as an interchangeable component. The fiber guide conduit can be releasably mounted at one end in the opening roller housing in a seating recess and at the other end in the rotor housing in a bore of a sealing plate that is attached to the rotor housing. The sealing plate maintains a low pressure condition created by a vacuum line attached to the rotor housing. This low pressure condition induces the pneumatic conveyance of opened fibers from the opening roller to the rotor through the fiber guide conduit. Sealing components, such as an O-ring in the opening roller housing and a sealing nozzle at the rotor housing assure that a sealed connection of the fiber guide conduit both with the opening roller housing and with the sealing plate is maintained for pneumatic conveyance.

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: A method and device of cleaning the rotor (6) of a rotor spinning machine are provided in which, after the opening of a spinning unit, there are sucked off from the rotor (6) fibres and impurities being released from the inner surface of the rotor by pressure air applied to said inner surface. The cleaning pressure air is led into the rotor (6) in at least two air streams producing in the rotor 6 a symmetrical streaming in one and the same direction and the supplied air, together with the released impurities, is sucked off through the center of the inlet aperture (63) of the rotor (6).

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: 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 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: 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: 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 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: 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 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: 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: In the case of a device for open-end rotor spinning, the axles of the spinning rotor, the supply roller and the opening roller--in plan view--are arranged in parallel planes to each other. In side view the axles of the supply roller and the opening roller are arranged inclined compared to the horizontal axle of the spinning rotor. A driving shaft extends perpendicularly to the above mentioned planes and drives the supply roller with a worm and a worm gear. The axle of the drive shaft is also the swivel axis for a hinged housing which supports the supply roller and the opening roller, the hinged housing also containing the cover for the spinning rotor. The hinged housing is supported independently from the rotor housing and is detachable at right angles to the swivel axis. Both the opening roller and the supply roller are accessible from the operational side when the hinged housing is in spinning position.

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.