Abstract: A yarn draw-off nozzle for an open-end spinning station of a rotor spinning machine includes a yarn feed region including a spiral having at least one turn with spirally extending surfaces disposed one above the other being rectilinear with respect to a yarn travel direction. The surfaces are each inclined at an angle relative to the surfaces located above and below them, defining spirally extending yarn deflection locations for supporting yarn to be drawn off.

Abstract: An apparatus for making a yarn comprises two pairs of conveying rollers for defibrating at least one fibrous roving, two juxtaposed, closely spaced twisting drums, which succeed the conveying rollers and define a generally triangular twisting space, to which suction is applied and withdrawing rollers for withdrawing the yarn made from the fibers twisted in the triangular twisting space. To ensure desirable spinning conditions in such an apparatus, it is proposed that the two pairs of conveying rollers, which pairs immediately succeed each other, the conveying rollers of the receiving pair, which are remote from the triangular twisting space, define a clamping nip, form a delivering pair of rollers are nearer to the triangular twisting space and defining a guiding nip of rollers permits a slip relative to the fibers, and delivering pair are arranged to be driven at a higher peripheral velocity than the conveying rollers of the receiving pair but not in excess of the velocity of yarn formation.

Abstract: To spin a yarn with an open-end rotor spinning device, the fibers are fed to a fiber guiding surface from which the fibers are deposited on the sliding wall of a spinning rotor after passing over a gap. At the same time, an air stream is guided through the gap into the interior of the spinning rotor and is then removed from the interior of the spinning rotor without passing through the gap again. To produce the air stream, a device for the production of a pressure drop which produces the air flow flowing into the interior of the spinning rotor is assigned to the gap (17).

Abstract: A rotor type open-end spinning frame spins a yarn from a fiber bundle formed from unraveled fibers at a fiber collecting section while applying a twist to the fiber bundle during normal spinning, and which pieces the fiber bundle to a standard thread supplied to the fiber collecting section during yarn piecing. The spinning frame has a rotatable outer rotor which has an inner wall with a fiber collecting section. A conduit member is fixed opposite the open-end of the outer rotor and induct the fiber bundle and the standard thread therethrough. An inner rotor is disposed coaxially to and rotatable in the outer rotor. The inner rotor rotates independently of the outer rotor during both normal spinning and yarn piecing. A passage in the inner rotor communicates with the conduit member and guides the fiber bundle from the fiber collecting section to the conduit member during yarn spinning.

Abstract: A yarn draw-off pipe for the withdrawal of a yarn, e.g. from a spinning rotor. To achieve easier replaceability of the yarn draw-off pipe, the latter is provided with an inclined surface upon which an elastic element bears to retain the yarn draw-off pipe. The inclined surface is placed in relation to the axis of the holder of the yarn draw-off pipe in such manner that the force of the elastic element exerted radially to the axis produces a force acting in axial direction, so that the yarn draw-off pipe is securely held in its holder.

Abstract: Opened fibers are supplied into a rotor in high rotation, and a fiber bundle collected at a fiber-collecting section of the rotor is drawn as yarn from a yarn drawing passage provided on the open side of the rotor. A rotary assembly which is actively driven separately from the rotor is provided coaxially in the rotor. The rotary assembly has at least part thereof facing the vicinity of the fiber-collecting section and another part shaped to face a first end of the yarn drawing passage. The rotary assembly is provided with a yarn passage for guiding a fiber bundle to a position opposite the yarn drawing passage from the vicinity of the fiber-collecting section. A twist propagation preventing portion is provided in that end of the yarn passage that lies on the fiber-collecting section side. The rotation of the fiber bundle is suppressed by the twist propagation preventing portion, stopping the twisting.

Abstract: A process for introducing a fiber sliver into a fiber processing machine which has an openable sliver feeding device and a sliver introduction funnel and a sliver injector, comprising the following steps: opening the openable sliver feeding device, grasping the leading end of the sliver pneumatically into and through the sliver introduction funnel and into the opened feeding device and closing the sliver feeding device on the sliver. The invention also includes a device for carrying out the process.

Abstract: A process and apparatus for treating yarn formed on an open-end spinning machine of the type wherein the yarn is drawn from a rotor through a navel and through draw-off rolls is provided. The yarn is guided from the navel to the draw-off rolls in a path at least a portion of which is inclined with respect to the axis of the navel and a false twist is applied to the yarn during its travel in the inclined portion of the path between the navel and the draw-off rolls. The yarn is permitted to untwist between the false twist application and the draw-off rolls in response to the applied false twist. The untwisting of the yarn causes fiber ends on the surface of the yarn to project outwardly in a hairiness or fleeciness producing manner. The false twist applying element can include a member which produces a rotating air stream about the periphery of the traveling yarn.

Abstract: A yarn withdrawal nozzle is provided for an open-end spinning arrangement, the essentially funnel-shaped contact surface of which consists of a material which, in a temperature range of approximately 50.degree. C. to approximately 100.degree. C., has a thermal conductivity of at least 80 W/mK (Watts per meter Kelvin) so that as a result damage to synthetic fibers caused by overheating is avoided also in the case of relatively high rotational rotor speeds.

Abstract: In an open-end spinning device a yarn draw-off nozzle suitable to ensure constant spinning conditions even at very high rotational speeds is provided. This is achieved in that the yarn draw-off nozzle is designed so as to be especially capable of heat dissipation and thus being capable of preventing a heat accumulation in the area of the yarn draw-off nozzle thanks to its high capability of heat dissipation.

Abstract: A spinning or twisting device in which a yarn is to be back-fed into the bore of a pipe-shaped element subjected to negative pressure in order to repair a yarn break. This pipe-shaped element is made in form of a yarn draw-off pipe of an open-end spinning device or as part of a pneumatic twisting device.A presenting device is moved over and beyond the pipe-shaped element into a yarn inserting position. The end of the pipe-shaped element towards the moving path of the presenting device is provided with a nozzle which is provided, in relation to the bore, on its side towards the yarn inserting position of the presenting device with a yarn support, and on its side away from the yarn inserting position with a yarn insertion groove, oriented in the direction of movement of the presenting device. The bottom of the yarn insertion groove is at a greater distance from the moving path of the presenting device than the yarn support.

Abstract: A yarn draw-off pipe for drawing off a yarn from an open-end spinning device. The draw-off pipe is equipped with first and second pipe sections, which are connected to each other through a connecting piece. The connecting piece contains a chamber and is provided with a deflection surface extending into the chamber. The latter is part of an insert. The connecting piece is provided with an insertion opening for this insert on its side towards the spinning element, when assembled, the insert is secured axially between the front end of the insertion opening and the first pipe section or, alternatively, between the two pipe sections. The insert is made of a ceramic material and, with its end towards the spinning device, projects radially beyond the outside diameter of the first pipe section. The area of the guide left free by the insert is filled with a plastic material.

Abstract: In a yarn draw-off pipe (4) for an open-end spinning device a twist stop element (5) is provided, consisting of several wires (50, 51, 52) wound in the same direction and in contact with the circumferential wall of the bore (411). The coils of these wires (50, 51, 52) are in contact with each other. The ends (501, 511) extend outward near the intake opening (43) essentially transversely to the bore axis. The twist stop element (5) is made in form of a replaceable insert.

Abstract: An open-end rotor spinning apparatus is provided which includes a spinning rotor element for forming yarn including an open side. A cover element is provided for covering the open side of the spinning rotor element. A projection element is disposed at the cover element and projects into the side of the spinning rotor element. A fiber feeding duct is disposed in the projection element. A yarn withdrawal duct is also disposed in the projection element and provides a pathway for formed yarn being withdrawn from the spinning rotor element. A yarn withdrawal nozzle element projects from the yarn withdrawal duct element into the spinning rotor element open side. Holding elements are provided other than the yarn withdrawal duct element which hold the yarn withdrawal nozzle element on the projection element.

Abstract: In an open-end rotor spinning device having a rotatable spinning rotor and a coaxial yarn withdrawal navel mounted in a rotor cover, a tubular twist choking member is removably mounted rotatably in general airtight relation to the cover at an angle with respect to the rotor axis with a yarn withdrawal tube affixed coaxially to the twist choking member. A curved passageway extends longitudinally through the twist choking member with plural obliquely-arranged yarn deflection elements constricting the convex side of the passageway. The twist choking member and the yarn withdrawal tube may be selectivey positioned rotatably as a unit to achieve a desired effect on spinning stability and yarn quality.

Abstract: A method and a device for improving a yarn produced with genuine twist in the rotor of an open-end spinning apparatus directs the yarn through a yarn take-off nozzle in a given yarn travel direction. The yarn is subsequently diverted from the given yarn travel direction first to one side and then back to the opposite side over false-twist edges disposed obliquely relative to the given yarn travel direction including a last false-twist edge. Outer fiber ends of the traveling yarn are spread radially apart after passing the last false-twist edge. The yarn is subsequently passed through a pair of delivery rollers.

Abstract: An open-end rotor spinning apparatus is provided which includes a spinning surface element. The spinning surface element is followed by a deflecting element having at least one false-twisting edge. A surface area is spaced opposite the deflecting element and includes a recessed area opposite the at least one false-twisting edge.

Abstract: In open-end rotor spinning, imparting lesser false twist to the yarn being formed as it revolves through the yarn receiving zone and greater false twist as it revolves away from the zone. This is accomplished by different frictional resistance surface characteristics on the surface of a navel, or by shaping the surface for lesser extent of yarn contact in one surface portion and greater extent of yarn contact in another surface portion.

Abstract: An apparatus for open-end spinning is provided which includes a twisting element for twisting yarn. A yarn withdrawal nozzle is provided downstream from the twisting device in a yarn withdrawal direction. A yarn withdrawal device downstream from the yarn withdrawal nozzle withdraws yarn from the twisting device. A yarn deflection device is provided for deflecting yarn downstream from the yarn withdrawal nozzle. The yarn deflection device includes at least one false-twisting edge. The yarn deflection device includes a first deflection which deflects the yarn in a first direction and at least one additional deflection downstream from the first deflection which deflects the yarn into a direction deviating from the first direction.

Abstract: An open-end rotor spinning apparatus is provided which includes at least one spinning unit having yarn deflecting elements downstream from a yarn withdrawal duct. The yarn deflecting elements deflect yarn from the yarn withdrawal duct in a yarn spinning path. The yarn deflecting elements include at least one false-twisting edge. Yarn returning elements are provided for returning a yarn end to the yarn withdrawal duct past the yarn deflecting elements in a piecing path having a deflection less than the yarn spinning path deflection.

Abstract: The invention relates to an open-end rotor spinning unit and particularly solves the problem of the relationship between a fiber defining stud of a separator, a fiber supply duct and a yarn take-off duct passing through the separator and the stud.According to the invention, there is established a dimensional relationship of the defining stud to the mean staple length of fibers, and the orientation of the supply duct at an acute angle to the front wall of a cylindrical projection partially engaging into the spinning rotor.In inner section of the peripheral wall of the defining stud is curved in the direction of a natural fiber flow trajectory into the direction of the spinning rotor rotation while the outer section is either in contact with or radially set back from the cylindrical wall of the projection at a distance of up to 4 millimeters from the edge of the wall.

Abstract: An improved navel member positioned in the cover of the spinning rotor of an open-end spinning frame includes a barrel having a longitudinal passageway extending therethrough. The axis of the passageway is substantially coincident with the thread path as it exits the spinning rotor. A cylindrical insert is fixed in the barrel passageway and includes a longitudinal channel therethrough through which the thread actually passes. A plurality of spaced longitudinal grooves in the inside wall surrounding the longitudinal channel receive elongated ceramic rods partially embedded therein. The rods form a plurality of spaced obstructions around the periphery of the longitudinal channel. The periphery of yarn passing through the navel member intermittently engages and disengages the ceramic rods causing an improved roughening and bulking effect.

Abstract: An open-end spinning device has a driven spinning chamber and an outlet tube mounted coaxially with the spinning chamber. A projection is provided on the inner curvilinear surface of the outlet tube, the projection extending along a spiral uncoiling in the direction towards the spinning chamber. The configuration of the projection spiral is chosen in such a manner that the projection of the angle formed between a tangent line to the spiral and a line drawn at right angles to the longitudinal axis of the outlet tube on an imaginary plane drawn at right angles to the longitudinal axis of the outlet tube in the zone of a portion of the spiral most distant from the spinning chamber is between 30.degree. and 40.degree. which corresponds to the angle of turns of the yarn produced in the spinning chamber.

Abstract: The method of producing reinforced thread includes feeding loose fibres o the disc of a rotary twisting member, guiding the core thread through the disc eccentrically with respect to the axis of rotation of the twisting member and conducting the winding of the fibres about the core thread, to form the reinforced thread by rotating the twisting member. The apparatus for performing the method of producing reinforced thread comprises fibre-separating means communicating with a twisting member having a flat disc with an axial bore and an opening for the passage of the core thread, arranged eccentrically with respect to the axis of rotation of the twisting member, a holder for a bobbin with the core thread, a unit for winding the reinforced thread, and a guide for the core thread having its geometric center overlying the plane of the disc and aligned with the axis of rotation of the twisting member.

Abstract: The spinning device for open-end spinning contains a withdrawal nozzle with a substantially spiral-shaped bead or ridge as well as a twist blocking element or twist trap containing beads or ridges and provided in a thread withdrawal passage. The inclinations of the substantially spiral-shaped bead or ridge and of the beads or ridges in the withdrawal nozzle and in the withdrawal passage, respectively, substantially extend in the same direction or sense as the twist of the yarn. This device permits increasing the stability of the yarn, reducing the number of thread breakages and/or increasing the production rate. The yarn characteristics are less dependent upon the fiber material and the yarn type. In particular, the production of yarns with a soft handle is rendered possible at higher rotor speeds than heretofore possible.

Abstract: An open-end rotor spinning machine includes a multiplicity of spinning boxes disposed side by side on a machine frame at spinning stations; each of the spinning boxes including: a basic frame, a first shaft disposed on the basic frame, a spinning rotor having a rotor plate being disposed on the first shaft, a rotor housing surrounding the rotor plate, a second shaft disposed on the basic frame substantially perpendicular to the first shaft, a lid-like insert covering an opening formed in the rotor housing and being pivoted about the second shaft for opening the spinning box, a thread withdrawal channel disposed on the lid-like insert, a thread withdrawal nozzle disposed on the thread withdrawal channel in the vicinity of an opening in the rotor plate, the thread withdrawal nozzle being pivotal on the second shaft out of the vicinity of the opening in the rotor plate in a given direction, a third shaft disposed on the basic frame, a bearing pivotally disposed on the third shaft, a fiber feeding and opening dev

Abstract: A device is provided for open-end friction spinning having two adjacently arranged rollers serving to form a yarn forming wedge-shaped gap. The rollers are disposed in essentially a vertical direction. A supply of fibers is directed through a fiber feed channel extending at a sharp angle from underneath the rollers to the wedge-shaped gap. The withdrawal device for the spun yarn is disposed above the rollers. Between the wedge-shaped gap and the withdrawal device there is arranged a turning guide which first withdraws the yarn opposite the feeding direction in the longitudinal direction of the wedge-shaped gap and then turns the yarn and withdraws it to the withdrawal device disposed above.

Abstract: A fiber bundle produced by feeding combed fibers into a rotating rotor to accumulate the fibers over the inner circumference of the rotor is drawn out therefrom and is introduced into a false twisting unit, where the fiber bundle is false-twisted so that the twists are transmitted to a portion of the fiber bundle adjacent to the fibers accumulated over the inner surface of the rotor. A guide funnel having a guide surface extending near to the fiber accumulating surface is disposed within the rotor.

Abstract: The spinning device for open-end spinning comprises a withdrawal nozzle secured to a cover of a rotor housing for a spinning rotor and a nozzle body coacting with the withdrawal nozzle. The withdrawal nozzle and the nozzle body conjointly form a withdrawal passage or channel for the thread or the like produced by the spinning rotor. The cover is provided with a receiving socket which fixes the position of the nozzle body in radial direction, the nozzle body being inserted into the receiving socket. The nozzle body is pressed against the withdrawal nozzle by means of a manually-operable elastic device. The formation of the receiving socket permits insertion and removal of the nozzle body from the front side, that is from the service side of the spinning device. This provides the advantage of ready accessibility of the nozzle body and, in turn, thus affords easy replacement thereof. Replacement can be carried out without the use of tools.

Abstract: An "open-end" method of spinning using a device comprising a supply device, a disintegrating means, a rotor, an outlet end member, a supply device and a winding device, characterized in that means are provided for giving the "fibre deposition zone" (11) a speed equal to that of the "fibre formation zone" and in that the zones are actuated so that the fibres (10) coming from the disintegrator cannot be deposited on the thread (14) being formed.

Abstract: A thread draw-off nozzle for an open-end rotor spinning machine includes a nozzle body, and an exchangeable thread inlet funnel connected to the nozzle body.

Abstract: This is a process and apparatus for the preparation of fasciated spun yarns, which includes feeding separate single fibers formed by opening and drafting a continuous staple fiber bundle into a rotor (20), collecting and holding the single fibers on a fiber-collecting portion of the rotor (20) and taking out the collected fibers through a center piece (26) by delivery rollers (33) while strongly false-twisting the collected fibers in the same direction as that of true twists given by the rotor (20) into a twisted yarn by a false-twisting apparatus arranged between the rotor (20) and the delivery rollers (33), wherein the separated single fibers are supplied to a travelling plane for the twisted yarn between the fiber-collecting portion of the rotor (20) and the center piece (26) to entangle some of the single fibers with the twisted yarn in the strongly false-twisted state, and the entangled single fibers are entwined around the periphery of the twisted yarn by subsequent release of the false twists of the tw

Abstract: A method of increasing the hairiness and bulkiness of a thread, in an open-end rotor spinning machine having a deflection ring disposed concentric to the axis of rotation of the rotor, includes forming a false twist in the thread with the deflection ring, continuously withdrawing the thread through the deflection ring substantially along the direction of the axis of rotation of the rotor, dissolving the false twist in the thread, forming a thread balloon with the thread, bringing the thread in contact with a multiplicity of separately disposed balloon disturbance elements, and changing the diameter of the thread balloon several times during each revolution of the thread balloon, and a device for carrying out the method.

Abstract: An elbowed yarn exit tube placed at the delivery end of a high-speed hollow rotor contains one or a number of false-twist ribs against which the spun yarn is applied in frictional contact. The ribs form part of a detachable member which is fitted against the periphery of a recess formed in the elbowed portion of the exit tube in the zone nearest the generator-line which has the shortest radius of curvature, the detachable member being locked in position by means of a slidable retaining sleeve.

Abstract: A yarn draw off tube for an open-end spinning unit which improves the twist transmission to a fiber ribbon in a spinning rotor. The yarn draw off tube is provided with a yarn inlet on the top wall thereof and a yarn outlet on the lower side wall thereof, and the yarn inlet is eccentric from the center in a direction opposite to the yarn outlet. In the spinning operation, a twist imparted to a yarn drawn off from the spinning rotor can smoothly be transmitted to the root portion thereof. Thereby, yarn breakage is restrained and a yarn of good appearance and strength can be obtained.

Abstract: A method for manufacturing a thread, includes introducing fibers into a rotor having a fiber collecting groove, combining the fibers in the collecting groove into a fiber ring gradually converting into a thread, conducting the thread in a given travel direction through a pneumatic twisting device discharging a quantity of air, bringing the thread in contact with an air stream in the pneumatic twisting device which rotates around the longitudinal axis of the thread against the given travel direction of the thread, conducting fibers loosened from the thread back into the rotor with at least part of the quantity of air discharging from the pneumatic twisting device, drawing off the twisted thread leaving the pneumatic twisting device, and conducting the twisted thread to a thread collecting device, and a device for carrying out the method.

Abstract: Open-end spinning device, including a rotor housing, a spinning rotor disposed in the rotor housing, a housing cover having a fiber feeding channel formed therein being in communication with the rotor, a thread delivery channel disposed in the cover, and a thread delivery orifice being at least partly disposed in the cover and being in communication with the thread delivery channel and rotor, the orifice having a hard and wear-resistant surface layer at thread deflection locations, the surface layer having areas of different wearability distributed therein.