Abstract: A channel plate adapter is provided for use in a cover of a rotor housing of an open-end spinning device, wherein a rotor is rotatably arranged in the rotor housing. The channel plate adapter includes an output fiber channel that conveys fibers to the rotor, the output fiber channel having an inlet side where fibers enter and an outlet side from which the fibers exit towards the rotor. The output fiber channel further includes a bend between the inlet side and the outlet side, the bend splitting the output fiber channel into a first section formed between the inlet side and the bend, and a second section formed between the bend and the outlet side. The bend changes direction of the second section relative to the first section such that the second section is oriented against a direction of rotation of the rotor.

Abstract: An air jet aggregate for an air jet spinning apparatus for producing a spun thread from a staple fiber strand includes a vortex chamber and a number of fluid-feeding injector channels running into the vortex chamber. At least two injector channels are provided, which have differing angles of inclination in relation to a parallel to the axis of the spun thread. The at least two injector channels having differing angles of inclination are connectable to at least one pressurized air source. The injector channels with differing angles of inclination are, preferably, connectable to separately adjustable pressurized air sources.

Abstract: A method for spinning fibers onto the free ends of the two threads of a yarn that is produced during an integrated spinning and twisting process and a two-for-one spinning and twisting apparatus for performing the method are provided. The method includes gripping a twisted yarn, separating two threads of the twisted yarn in a manner such that the twist which was originally present in each individual thread prior to the doubling of the thread with the other thread returns to the now separated thread portion, and forming a thread loop of each separated thread portion. Each thread loop is clamped and respective portions of the two branches of the thread loop extend to a spinning rotor and the spindle hollow axle. Spinning is commenced in coordination with winding and the thread loop is dissolved as the now joined thread is drawn into the spindle hollow axle.

Abstract: A device for producing a twisted yarn by an integrated or combined spinning and twisting process is provided and comprises a two-for-one twisting spindle with at least two spinning rotors, positioned within the yarn balloon produced by the twisting process, for producing the individual yarns to be twisted, into which spinning rotors the disentangled fiber material is supplied respectively by the fiber supply tubes, which are connected to the fiber material disentangling units. The fiber material disentangling units are combined to a single fiber material disentangling apparatus with common drive elements for the two disentangling units.

Abstract: In an individual-spindle-drive type multiple twister that directly employs separate motors to drive the spindle shafts of each twisting unit, when a spindle is inserted into the housing during motor assembly, a rotor and a stator may attract each other and adhere to each other, and this attraction may prevent the spindle shaft from being correctly inserted into a target bearing, thus making it difficult to assemble the motor. A spindle shaft 4 is rotatably supported by bearings 27a and 28a mounted onto upper and lower supporting members 27 and 28. The distance A between the lower end of the rotor magnet 32 of the drive motor 10 fixed to the spindle shaft 4 and the lower end of the spindle shaft 4 is longer than the distance B between the upper end of the stator coil 31, which is fixed to the housing 34 of the drive motor 10, and the bearing 28a of the lower supporting member 28. In addition, the tip 4 of the spindle shaft 4c is tapered to facilitate insertion.

Abstract: A process for producing dyed spun cotton yarns having a reduced number of irregularities and increased luster is described. The process involves dyeing at least a portion of the cotton fibers which are to form the yarn, then combing the dyed fibers subsequent to the dyeing process. The dyed and combed fibers are then optionally blended with fibers having a visually distinct appearance, and spun into a yarn using conventional spinning methods. The resulting yarns having a dramatically reduced number of thick and thin places and improved yarn properties including improved luster and hand. Furthermore, when the thus-dyed fibers are blended with differently-colored fibers prior to the combing operation, the resultant yarns match the visual colors of like-colored yarns produced by conventional processes, while the color is more intimately blended and the yarns have a markedly increased uniformity, luster and tenacity.

Abstract: A device for producing a twisted yarn in a combined spinning and twisting process has two open end spinning rotors positioned in a stationary protective pot, a hollow spindle axle into which the spun yarns produced by the spinning rotors are introduced, and a yarn guide channel extending radially from the spindle axle and driven in rotation about the spindle axis for guiding the yarn formed by the spun yarns. The yarn exits from the yarn guide channel and is guided external to the protective pot counter to the guiding direction within the spindle axle to a centering point positioned on an extension of the spindle axle. A device for supplying a dissolved fiber material to the two open end spinning rotors is provided. Two slide bearings for supporting the spinning rotor shafts, an electric motor with a drive member resting at the spinning rotor shafts, and for each spinning rotor two guide rollers are arranged within the protective pot.

Abstract: A method for manufacturing a twisted yarn by a combined spinning and twisting process includes the steps of producing in at least two spinning devices individual spun yarns and guiding the spun yarns together to a first centering location positioned coaxially to the axis of the double twisting device to subject the individual spun yarns in a first yarn feeding direction to a first twist, whereby a yarn balloon is formed. Subsequently, the spun yarns are guided to a second centering location, also positioned coaxially to the axis of the double twisting device, and through the second centering location into the interior of the yarn balloon to subject the spun yarns in a second yarn feeding direction, opposite the first yarn feeding direction, to a second twist. The spun yarns are then wound onto a rotating bobbin positioned in the interior of the yarn balloon.

Abstract: In a process for open-end spinning at least one sliver is opened to single fibers, which form a fiber veil. The single fibers are fed to a rotating collecting surface which is driven transversely to their travel direction, and are withdrawn from the collecting surface in the form of a yarn with twist along a yarn formation line before the completion of one single revolution of the collecting surface. The single fibers are never slowed down at any point in the sliver-to-yarn process. Immediately after their separation from the sliver, the single fibers are subjected to an exactly predetermined, mechanically controlled speed.

Abstract: Described are a multifilamentary yarn composed of a plurality of periodically interlaced synthetic polymeric filaments which is characterized by regular node spacing and a yarn harshness of less than about 100 and an apparatus and process for making the same.

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: 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 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: A process and device for piecing in an open-end spinning device includes switching on a fiber feeding device for a predetermined period of time so that fibers which are undesired for piecing are combed out of the leading end of the fiber sliver which is presented to an opener device. The combed out fibers are deflected from the fiber collection surface. The fiber feeding device is switched off after the predetermined period of time once the undesired fibers have been combed out and is maintained in an off condition for a short period of time so that the fibers remaining in the leading end of the fiber silver are only minimally damaged by the opener device. The fiber feeding device is switched back on and the fiber stream is deflected from the fiber collection surface as the stream increases to full strength. The fiber stream is subsequently deflected to the fiber collection surface for piecing in coordination with backfeeding of a yarn end to the fiber collection surface.

Abstract: In a method and device for manufacturing a twisted yarn a spindle rotor having a hollow spindle axle with inlet and outlet and a yarn guide channel extending radially outwardly from the outlet is provided. The yarn exiting the yarn guide channel forms a yarn balloon. A stream of dissolved fiber material is fed axially through the spindle rotor into the space delimited by the yarn balloon and is divided into two partial streams. Each partial stream is guided first radially outwardly, then upwardly substantially parallel to the hollow spindle axle to a predetermined level, and subsequently radially inwardly to a respective spinning device arranged within the space delimited by the yarn balloon. A fiber is spun in each of the spinning devices, withdrawn, and guided axially downwardly. The fibers together are fed into the inlet of the hollow spindle axle to form a yarn. The yarn is guided through the hollow spindle axle and the yarn guide channel from where it exits and forms the yarn balloon.

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: 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 process for piecing a broken yarn on an open-end spinning device in which the fiber feed to the fiber collection surface, and which has been interrupted during stoppage of the open-end spinning device. The fiber feed is switched back on and is immediately brought to full production speed. In this process the combed-out state of the fiber tuft at the point in time of when fiber feed is switched back on is ascertained. The point in time when yarn draw off is switched back on and the speed of it are adapted to when the feeding of fibers to the fiber collection surface becoming effective. The yarn is subjected to a multi-phase acceleration. The first phase of the draw-off acceleration is adapted to the incorporation of fibers into the back-fed yarn end. At least one additional phase of the draw-off acceleration serves to reach and/or to maintain the desired fiber mass.

Abstract: Denim fabric is made from warp yarn which is at least 30% novelty cotton yarn having irregularly spaced effects (e.g. slubs) about one-half inch to two inches in length. The cotton novelty yarn is made by separating cotton sliver into cotton fibers, and acting on the cotton fibers with a negative wire combing roll, and then twisting the cotton fibers into the cotton novelty yarn. The negative wire combing roll has a tooth angle of about -0.01 to -15.degree. (e.g. about -2.degree.). The novelty cotton yarn is combined with at least 10% conventional novelty yarn or non-slub open end or ring spun yarn and made into a warp of about 54-100 ends per inch, and may be ring dyed (with indigo, vat, sulphur, pigment or reactive dye) so that the core of the yarn remains white. The warp is woven with a filling yarn to produce a denim fabric with a weight of about 5 oz. -17 oz. per sq. yd. having the weave and yarn size selected so that a tight construction is provided which highlights the slubs.

Abstract: Industrial dust mop having a homogenous yarn composed of high melt staple fibers and low melt staple which has been heated to homogeneously melt the low melt fibers throughout the yarn to form a fused yarn product in the mop.

Abstract: Industrial dust mop having a homogenous yarn composed of high melt staple fibers and low melt staple which has been heated to homogeneously melt the low melt fibers throughout the yarn to form a fused yarn product in the mop.

Abstract: Denim fabric is made from novelty cotton yarn having irregularly spaced irregularities (e.g. slubs) about one-half inch to two inches in length. The cotton novelty yarn is made by separating cotton sliver into cotton fibers, and acting on the cotton fibers with a negative wire combing roll, and then twisting the cotton fibers into the cotton novelty yarn. The negative wire combing roll has a tooth angle of about -0.01.degree. to -15.degree.. The novelty cotton yarn is made into a warp of about 54-100 (e.g. 54-78) ends per inch, and is ring dyed so that the core of the yarn remains white. The warp is woven with a filling yarn to produce a denim fabric with a weight of about 5 oz.-17 oz. per sq. yd. having the weave and yarn size selected so that a tight construction is provided which highlights the slubs. The fabric is subjected to surface abrasion to remove the surface of dye on the slubs to show a lighter slub than body of the fabric.

Abstract: During the production of a yarn, and independently of fiber feeding into the spinning element, the air circling together with the opener roller during spinning is removed from the area of the housing which does not convey fibers by an auxiliary air stream which is so strong that it removes fibers and fiber fragments that have become detached from the opener roller and are circling with the opener roller. The auxiliary air stream removed from the housing is introduced into the spinning rotor in such manner that the fibers which are conveyed with it are deposited on the fiber collection surface. To remove the auxiliary air stream, an auxiliary channel is provided which is connected to the source of negative pressure independently of the fiber feeding channel and at the same time may let out into the spinning element.

Abstract: A process for piecing a broken yarn on an open-end spinning device in which the fiber feed to the fiber collection surface, and which has been interrupted during stoppage of the open-end spinning device. The fiber feed is switched back on and is immediately brought to full production speed. In this process the combed-out state of the fiber tuft at the point in time of when fiber feed is switched back on is ascertained. The point in time when yarn draw off is switched back on and the speed of it are adapted to when the feeding of fibers to the fiber collection surface becoming effective. The yarn is subjected to a multi-phase acceleration. The first phase of the draw-off acceleration is adapted to the incorporation of fibers into the back-fed yarn end. At least one additional phase of the draw-off acceleration serves to reach and/or to maintain the desired fiber mass.

Abstract: A process and an arrangement for the spinning of staple fibers into a yarn is disclosed in which sliver-shaped fiber material is opened up into individual fibers which are fed to a collecting surface which moves at a speed which corresponds to at least the feeding speed of the individual fibers. The collecting surface conveys the fibers to a withdrawal point with the collecting surface tapering between the feeding point and the withdrawal point. The collecting surface operates to bundle the fibers during the conveying to the withdrawal point to form a fiber composite which is withdrawn at the withdrawal point while receiving a twist. It is provided that the withdrawal of the fiber composite at the withdrawal point takes place in a direction which corresponds essentially to the conveying direction of the fiber composite on the collecting surface, a withdrawal speed being provided which is essentially equal to the conveying speed of the collecting surface.

Abstract: A novel yarn is a bundle of multifilament continuous supply yarns with two sequentially alternating lengths in a preselected ratio. The first length has alternating sections of entangled filaments and unentangled, crimped filaments alternating in closely, substantially randomly-variably spaced sequence. The second length has substantially unentangled, crimped filaments. The yarn has substantially uniform linear denier and the extent between nodes of the second length is greater than the extent between nodes of any of the second sections of the first length. The yarns made present a space dyed appearance, especially when multicolored supply yarns are employed, combined with varying textural effects.

Abstract: The method of, and apparatus for, producing a yarn uses a friction spinning device comprising a perforated first friction spinning drum and a second friction spinning drum which can also be perforated. Two fiber feed passages project to the first friction spinning drum and are each supplied by opening assemblies which individualize or individually separate the fibers. The fibers are transported toward the first friction spinning drum using a feed air stream in the fiber feed passages. This feed air stream is produced by the first friction spinning drum which is maintained under sub-pressure. Advantageously, the fiber double-feed to the friction spinning drum permits supplying two different fiber types to the same yarn end. Also, different inclinations of the fibers at the friction spinning drum can be obtained by different inclinations of the fiber feed passages in order to produce yarns of different character.

Abstract: A mottled appearing yarn having a main strand of fibers and wrapper fibers of different color than the main strand. The yarn is produced by feeding longer and coaser fibers with shorter and finer fibers in an open end rotor spinning machine and controlling the operation to accentuate wrapper fiber formation with the longer and coarser fibers. The wrapper fiber formation is accentuated by using a relatively low rotor diameter to fiber length ratio and by using an aggressive navel action.

Abstract: For the starting of slivers at a textile machine, two staple fiber slivers are individually inserted into two guides. The first guide assumes a feeding position and guides the staple fiber sliver being fed into a feeding device. The second guide holds the second staple fiber sliver in a readiness position. When the first staple fiber sliver going to the feeding device is interrupted, the first, empty guide is brought from its feeding position into its readiness position. At the same time the second guide, together with the staple fiber sliver inserted into it, is brought into the feeding position. Thereupon, a new staple fiber sliver is introduced into the first guide, now in the readiness position, whereupon a new sliver is put in readiness. The two guides are connected to each other with respect to movement. The invention also includes the process for replacing an interrupted supply of sliver to reduce down time to a minimum.

Abstract: The method of, and apparatus for, producing a yarn uses a friction spinning device comprising a perforated first friction spinning drum and a second friction spinning drum which can also be perforated. Two fiber feed passages project to the first friction spinning drum and are each supplied by opening assemblies which individualize or individually separate the fibers. The fibers are transported toward the first friction spinning drum using a feed air stream in the fiber feed passages. This feed air stream is produced by the first friction spinning drum which is maintained under sub-pressure. Advantageously, the fiber double-feed to the friction spinning drum permits supplying two different fiber types to the same yarn end. Also, different inclinations of the fibers at the friction spinning drum can be obtained by different inclinations of the fiber feed passages in order to produce yarns of different character.

Abstract: The method of, and apparatus for, producing a yarn using a friction spinning device comprising a perforated first friction spinning drum and a second friction spinning drum which can also be perforated. Two fiber feed passages project to the first friction spinning drum and are each supplied by opening assemblies which individualize or individually separate the fibers. The fibers are transported toward the first friction spinning drum using a feed air stream in the fiber feed passages. This feed air stream is produced by the first friction spinning drum which is maintained under sub-pressure. Advantageously, the fiber double-feed to the friction spinning drum permits supplying two different fiber types to the same yarn end. Also, different inclinations of the fibers at the friction spinning drum can be obtained by different inclinations of the fiber feed passages in order to produce yarns of different character.

Abstract: A method of manufacturing a combined yarn which includes feeding staple fibers to the collection groove of an open-end spinning rotor, twisting the staple fibers into a staple fiber yarn, combining the staple fiber yarn with a continuous filament yarn which is also fed into the spinning rotor and then twisting the continuous filament yarn and the staple fiber yarn together to form a balanced ply yarn.

Abstract: When producing fancy yarn on open-end spinning devices, sliver-like basic fiber material is opened into individual fibers and is fed in an air stream to an open-end spinning element. A fiber sliver of the fancy-effect fiber material is conveyed at constant speed into an air stream by which fiber tufts are separated. Fancy-effect fiber tufts and individual fibers thus separated are fed to an open-end spinning element together with the opened basic fiber material. To carry out this process, a feeding device is provided for the fancy-effect fiber material, such feeding device being driven at constant speed so that the fancy-effect fiber material is brought into the fiber feeding channel in the form of an uninterrupted fiber sliver.

Abstract: In the making of a yarn, a stream of drawn core fibers (17a) is twisted in a triangular twisting space (4) between two juxtaposed, closely spaced apart twisting drums (1, 2), which are rotated in the same sense, and covering fibers are wound about said stream of fibers in said twisting space. To make said yarn from a single roving (17), the drawn roving (17) is fed to the twisting space (4) on the circumference of a feed roller (8), to which a vacuum is applied, the roving which has been fed on said feed roller is divided into two streams of fibers (17a, 17b) before reaching the twisting space (4), one (17a) of said streams of fibers is intended to constitute the core of the yarn to be made and is moved on the feed roller (8) as far as to the twisting space (4), and the other (17b) stream of fibers consists of the covering fibers and is detached from the feed roller (8 ) and its fibers are caused to fly freely into the twisting space (4).

Abstract: Apparatus for making a yarn comprises a device which succeeds a drawing frame and serves to twist a drawn roving and to wind covering fibers around the drawn roving, and means for supplying the covering fibers. In order to ensure that the covering fibers can be uniformly wound around the roving in a structurally simple apparatus, two spaced apart, coaxial twisting members are provided as well as a ring, which is disposed between and coaxial to the twisting members and serves to supply the covering fibers. Air is sucked from a portion of the periphery of the ring, which can be driven to rotate in the same sense as the twisting members but at a different surface speed. The line of yarn formation extends on the receiving twisting member and the ring to the delivering twisting member along a helix, which has a hand in the sense of rotation of the twisting members.

Abstract: A friction spinning apparatus, includes oppositely-disposed, rotationally-symmetrical friction elements rotating in the same direction, the friction elements having perforated casings defining a line of closest mutual approach between the casings and two wedge-shaped regions adjacent the line of closest mutual approach, stationery suction devices disposed in the casings, the suction devices having suction apertures directed toward the perforated casings, a fiber feeding device for feeding spinning fibers along a yarn withdrawing direction, and a yarn withdrawing device for withdrawing yarn, each of the casings including a yarn formation zone receiving the spinning fibers at substantially the furthest upstream portion of the casings in the yarn withdrawing direction for continuously forming yarn, a curved transition zone downstream of the yarn formation zone, and a yarn consolidation zone downstream of the transition zone, the yarn consolidation zone being separate from and having a longitudinal axis disposed

Abstract: A method and apparatus for open-end friction spinning is disclosed having two adjacently arranged friction rollers, driven in the same rotational direction and forming a wedge-shaped gap therebetween. A suction device effective in the area of the gap as well as a fiber feed channel leading to the gap and a yarn withdrawal device for drawing off the produced yarn in the direction of the gap are also provided. It is further provided that the mouth of the fiber channel extending at a tangential angle to the gap is widened in the area of the gap in that the channel wall facing the same is formed with a rounded curve. By these measures the fiber deposition in the gap is improved by modifying the fiber transport air stream path to deposit the fibers in a straightened and parallel manner in the gap.

Abstract: An apparatus for producing special yarn made of a fiber strand in which a number of fibers are randomly arranged along the lengthwise direction thereof, in which special yarn at least one of the yarn structural parameters, e.g., yarn count number or number of twist, changes along the lengthwise direction of the yarn.A pattern of change of the parameters of the yarn structure with respect to the length of the special yarn to be produced is stored in a central processing device, while a spun length of the special yarn is measured by a sensor. The yarn structural parameters are changed to correspond to the pattern set to the central processing device and the special yarn is produced by the yarn forming device using another central processing device of the spinning frame.This apparatus can be used for a ring spinning frame, an open end spinning frame, a fasciated yarn spinning frame, and the like.

Abstract: Method of spinning staple fibers by imparting false twist to a continuous fiber bundle. The continuous fiber bundle is formed by a successive doubling of separated fibers, and is thereupon twisted by means of a false twisting element, the separated fibers being distributed along the twisted length of the fiber bundle, as well as along the untwisted section of the continuous fiber bundle.

Abstract: A fiber feed arrangement for an open-end friction spinning machines is disclosed. The fiber distribution zone in the wedge-shaped yarn forming gap formed by the friction rollers is configured in its size and/or its location relative to the friction rollers in dependence on the fiber length being processed and/or the desired yarn characteristic. In preferred embodiments the distribution zone is adjustable by means of at least one separate movable feed channel component in the area of the feed channel opening to the friction rollers.

Abstract: A single-step stable method of producing spun-twisted yarns. A twist point is located on the frictional surface of a take-off funnel of the spinning rotor. A strand material which forms a component of the final spun-twisted yarn product is exposed, between feed rollers and said twist point, to an appropriate combination of transport effects of a pneumatic field of force and a mechanical field of force. For this purpose, the tube, through which the strand material is supplied, is determined in dependence on the pneumatic conditions prevailing in the spinning rotor.

Abstract: A method of open-end spinning a yarn formed of two different types of fibers of staple fiber and a yarn formed thereby in which most of the outer fibers are formed of one type of fiber and most of the inner fibers are formed of the other component. The types of fibers are integrally linked by orienting and distributing the fibers as they approach the open end such that they lie substantially parallel to the open end and overlapping whereby part of some of the fibers of the inner type of fiber wrap around some of the fibers of the outer type of fiber.

Abstract: A method and apparatus for open-end spinning of novelty yarn produces novelty yarns in a simple manner. A sliver is fed to the fiber separating device of an open-end spinning apparatus to form distinct fibers, the fibers are air transported in a fiber flow path to the twisting device, controlled formation of effects (particularly slubs) is effected during air transport of the distinct fibers in their path, the formed effects are intermittently passed to the twisting device (e.g. pseudo-randomly), the fibers fed to the twisting device are twisted into a continuous strand of effect yarn (particularly slub yarn), and the continuous strand of effect yarn is taken up. The controlled formation of effects may be accomplished in a number of manners: introducing a needle making an angle of 25.degree.-45.degree.

Abstract: The present invention concerns the production of fancy yarns, in which during open-end spinning a roving is supplied program-controlled to the spinning unit for the yarn to be produced. According to the invention at least one roving bobbin is supported by a support member, which is detachably arranged on a can used as a receptable for the fibre material to be processed. The bobbin creel used up to the present for the bobbins impairs the accessability of the winding locations for the fancy yarn produced. This creel, according to the invention, no longer is required. Thus, the cumbersome mounting and dismantling of the creel in changing over from normal yarn to fancy yarn and vice-versa is dispensed with. According to the invention the alterations required for such changes of the yarn production mode are extremely simple.

Abstract: The invention relates to a method of and an apparatus for open-end spinning a novelty yarn (especially slub yarns), and the yarn so produced. A sliver is fed to the fiber separating device of an open-end spinning apparatus to form distinct fibers, the fibers are air transported in a fiber flow path to the twisting device, controlled formation of effects (particularly slubs) is effected during air transport of the distinct fibers in their path, the formed effects are intermittently passed to the twisting device (e.g. pseudo-randomly), the fibers fed to the twisting device are twisted into a continuous strand of effect yarn (particularly slub yarn), and the continuous strand of effect yarn is taken up. The controlled formation of effects is preferably accomplished by introducing a needle into the fiber flow path in the transport section, the fibers collecting on the needle. The fibers are passed to the twisting device by withdrawing the needle from the fiber flow.