Abstract: A knit fabric production method includes a step of producing a knit fabric K1 from an untwisted yarn Y0 while producing the untwisted yarn Y0 by disposing a fiber bundle FB around a linear core member CP formed of a soluble polymer, falsely twisting the fiber bundle FB by using an air flow swirling in a predetermined first direction and simultaneously causing open end fibers OF to adhere to an outer circumferential surface of the falsely twisted fiber bundle FB by using an air flow swirling in a second direction opposite the first direction, and untwisting the falsely twisted fiber bundle FB.

Abstract: A spinning position of an air-spinning machine and method of cleaning a yarn forming element of an air spinning nozzle are provided. The spinning position has an air spinning nozzle with a yarn forming element arranged within a vortex chamber for producing a yarn from a fibre band supplied to the air spinning nozzle, in which case the air spinning nozzle can be transferred from a closed state for yarn formation to an open state in which the yarn forming element can be cleaned. At least one cleaning nozzle for cleaning the yarn forming element in the open state of the air spinning nozzle is arranged at the spinning position, the cleaning nozzle being positioned and/or aligned or positionable and/or alignable, such that, at least in the open state of the air spinning nozzle, the yarn forming element can have a cleaning medium applied to it through the cleaning nozzle.

Abstract: A drawing and spinning apparatus of mixed yarns for air spinning machines with multiple feeds comprises at least a first and a second introducer element, an air spinning device, a drawing device, interposed between the introducer elements and the air spinning device, an air spinning chamber, an introducer nozzle shaped to receive the webs from the drawing device into respective insertion channels and introduce the webs into the spinning chamber according to a longitudinal feeding direction. With respect to a cross-section plane perpendicular to the longitudinal feed direction, groove bottoms of each of the two insertion channels of the webs into the chamber are aligned along a segment which is offset by an eccentricity with respect to a geometric centre of the chamber itself, through which a symmetry axis of the spinning chamber passes, the eccentricity being less than 5% of a maximum diameter of the spinning chamber.

Abstract: An air-jet type spinning device comprising at least one injection hole configured to introduce a flow of compressed air in a spinning chamber. A fibre feeding device facing the spinning chamber feeds the fibres in the spinning chamber. A spinning spindle is at least partially inserted in the spinning chamber and fitted with a spinning channel for the transit of yarn obtained from the fibres.

Abstract: An air spinning machine for producing a yarn from a fiber structure includes a spinneret with an internal eddy chamber. A spindle in the spinneret has an intake opening and extends into the eddy chamber. An annular gap is formed between an outside surface of the spindle and an inside wall of the eddy chamber. Air jets in the spinneret introduce air into the eddy chamber to impart twist to the fiber structure at the intake opening. An interior draw-off channel in the spinneret has a longitudinal axis by means of which the yarn is withdrawn from the eddy chamber. The air jets are aligned in a direction relative to a front side of the spindle around the intake opening so that some of the air introduced via the air jets during a spinning operation enters the annular gap and a remainder of the air enters the draw-off channel.

Abstract: A spiral yarn structure includes a core yarn comprising at least one core filament which is a filament fiber of 5-25D, a cover yarn comprising a plurality of cover fibers formed by stretching roves having a count ranging from 0.5 Ne to 2.0 Ne, wherein the cover fibers encloses the core yarn, and a wrap yarn wrapping the cover yarn at a twist factor K?3, wherein the wrap yarn comprises at least one wrap filament which is a filament fiber of 5-25D, and the at least one wrap filament wraps an outer side of the cover yarn at an inclined angle to form the spiral yarn structure having a count ranging from 40 Ne to 80 Ne.

Abstract: A contact nozzle for simultaneously coating a plurality of elastic strands moving in a machine direction with an adhesive is described. The contact nozzle includes a single fluid inlet for receiving the adhesive from a fluid module, a first inverted V-shaped notch, a second inverted V-shaped notch, a third inverted V-shaped notch, and a mounting surface configured to abut the fluid module when the contact nozzle is coupled to the fluid module. Each inverted V-shaped notch extends along the contact nozzle in the machine direction, has an open bottom end, a circular closed top end. Each inverted V-shaped notch includes an adhesive orifice in fluid communication with the single fluid inlet for receiving the adhesive for directing the adhesive into contact with an upper surface of an elastic strand.

Abstract: An air-jet type spinning device (4), comprising a body (8) at least partially hollow which defines a spinning chamber (12), a fibre feed device (16), facing said spinning chamber (12) so as to feed the fibres into the spinning chamber (12), a spinning spindle (20) at least partially inserted in the spinning chamber (12) and fitted with a spinning channel (24) for the suction of yarn obtained from said fibres, the spinning channel (24) defining a spinning direction (X-X), at least one channel (28) for sending a jet of compressed air inside the spinning chamber (12). Advantageously, the spinning chamber (12) is delimited at least partially by an outer side wall (32), opposite the spinning spindle (20), wherein at least one thread (36) is made on said outer side wall (32), wherein said at least one channel (28) is oriented so as to direct the jet of compressed air towards the at least one thread (36) in order to be guided and oriented by the latter.

Abstract: A spinning position on an air-jet spinning machine has a yarn-forming element extending at least partially into the turbulence chamber; and air jets directed into the turbulence chamber to impart to the fiber strand a twist in the area of an intake mouth of the yarn-forming element. A guide arrangement for guiding the fiber strand is situated in the area of the inlet port of the turbulence chamber and comprises at least two guide sections spaced a distance apart from one another, their mutual spacing decreasing in at least some sections in the direction of conveyance of the fiber strand. The guide arrangement also comprises at least one central guide element, which extends at least partially between the guide sections in a section running perpendicular to the longitudinal axis of the draw-off channel and produces a deflection of the fibers of the fiber strand perpendicular to the longitudinal axis of the draw-off channel.

Abstract: An apparatus for dreadlocking hair comprising a motor and a means for holding or engaging a strand of hair. The holding means is rotated by the motor, so that the strand of hair is twisted into a dreadlock, that is, a twisted bundle of hair where hair on the surface of the bundle describes a purely helical path, at least in a newly dreadlocked part of the strand.

Abstract: The invention relates to a device for producing knitted fabric comprising a knitting machine and at least one roving drawing and strengthening unit. The at least one roving drawing and strengthening unit has a roving supply unit, by means of which a roving can be provided in the form of a fiber bundle that has not been strengthened, a stretching unit, to which the roving can be fed in a roving conveying direction in the form of at least one sliver, and a spinning nozzle device, by means of which compressed air can he applied to a drawn roving exiting the stretching unit in a fiber strengthening segment. The invention further relates to methods for producing knitted fabric by means of a knitting machine and at least one roving drawing and strengthening unit.

Abstract: A mechanism for spinning fibrous material to yarn employing the ‘ring spinning process’ on a powered ring frame unit. The device can be adjusted and fixed for the thread count in production. The spinning cone reciprocating up and down to take up the spun yarn, thus ensuring most optimum geometry between the drafting roller and the spinning ring, adjustable at will. Each spinning cone on the entire frame being independent of each other in drive, speed and distance from the drafting assembly. Computers using a new software control the entire process. The described mechanism reduces power consumption, mechanical vibration and material breakage, consequently increasing productivity of the process and quality of the product.

Abstract: A composite bast fiber and cotton yarn is formed by blending natural bast fibers with cotton fibers which have been regenerated from waste cotton material such as trimmings and cuttings from the apparel manufacturing industry. The regenerated cotton and bast fibers are cleaned and blended, then carded to align the fibers into strands. Depending on the size and texture of the desired yarn, the fibers are stretched and drawn into slivers prior to spinning to join the fibers together. The natural bast fibers are up to two and one half to three time longer than the regenerated cotton fibers, so that the natural bast fibers overlap and braid onto the regenerated cotton fibers during spinning. The resultant yarn is stronger and more absorbent than yarns made solely out of regenerated cotton fibers, a blend of regenerated cotton and acrylic fibers, or regenerated cotton and polyester fibers currently available.

Abstract: A joining method wherein fibers of a fiber band are wound around an auxiliary thread threaded into a spinning device and drawn through a spinning cone. The newly spun thread is separated from the auxiliary thread and connected to the end of an upper thread. A spinning device is provided for a jet spinning machine for carrying out such method, comprising a first clamping device for temporary clamping of the upper thread and a second clamping device for temporary clamping of the auxiliary thread. A jet spinning machine for carrying out the method has a mechanism for storing the auxiliary thread and the newly spun thread, a mechanism for separating the auxiliary thread from the newly spun thread, and a splicing mechanism for connecting the newly spun thread to the upper thread, all arranged only on at least one operating carriage displaceable along multiple spinning stations.

Abstract: A yarn production process for enabling a yarn formed by filling the interior of a tubular member configured by knitting or braiding a fibrous material with expanded graphite as a base material, to be produced in a state of a high productivity in order to enable the yarn to be actually used in an economical manner. The process of producing a yarn formed by filling the interior of a tubular member configured by knitting or braiding a fibrous material with expanded graphite, the process has: a fine cutting step of successively cutting an expanded graphite sheet which is continuously supplied in a state where the sheet has a predetermined width, to a small width along the width direction of the sheet; and a supplying and filling step of guiding and supplying a strip-like expanded graphite material which is produced by the fine cutting step, into the tubular member to be filled into the tubular member.

Abstract: A device for the manufacture of a spun thread from a fiber sliver includes a fiber conveying channel with a fiber guidance surface. A yarn guidance channel includes an inlet mouth aperture disposed such that the fiber guidance surface guides fibers to the inlet mouth aperture. A fluid generating device creates eddy currents around the inlet mouth aperture to incorporate individual fibers into an end of a yarn being formed in the yarn guidance channel. The fiber guidance surface includes a fiber delivery edge having a shape and disposed relative to the inlet mouth aperture such that the fibers are guided over the delivery edge and conveyed to the inlet mouth aperture in an aligned generally flat planar formation.

Abstract: The invention relates to a device for the production of a spun thread from a staple fiber strand by means of air spin method. The fiber guiding element according to the invention includes a fiber conveying channel with a fiber guiding surface, whereby the fiber guiding surface ends at a fiber presenting edge and leads the fibers of the staple strand in the form of an essentially flat arrangement lying next to each other. The fiber-guiding surface is configured in such a manner that it includes a diverting point which causes a deviation of the staple fiber strand, where the deviation is being provided in such a manner that the free fiber ends of the fibers within the staple fiber protrude from the staple fiber strand.

Abstract: An open-end spinning device with an opening device for opening continuously supplied sliver material by means of a rapidly running opening cylinder, which opening device is arranged in front of a sliver spreading device (78) with cooperating pairs of spreading cylinders. The spreading cylinders (79, 80, 81, 82) comprise flanges that engage into recesses of the opposing spreading cylinder. The spacing between the particular cooperating spreading cylinders (79, 80, 81, 82) can be periodically varied. An unobjectionable opening process with a low speed of the opening cylinder and with a widened opening cylinder can be achieved with the sliver spreading device (78) of the invention which process is associated with a high-precision dosing and high yarn uniformity.

Abstract: A spinning device for producing a spun yarn by a circulating air flow in a housing has an adjustment device (17) for controlling the angular position of the fiber ends wrapped around a spindle head, and in turn, the angular position of the fibers wrapped around the produced yarn, by adjusting a linear component of an air flow into the spinning device as a function of the yarn withdrawal speed, whereby a yarn is produced of a required yarn strength even during a spinning start phase in the process of making the spun yarn.

Abstract: An apparatus for producing yarn spun from a loose fibre array using a vortex flow includes a fibre supply duct having an outlet opening. A vortex chamber in communication with the outlet opening is also provided. A yarn take-off duct is present with an inlet opening in communication with the vortex chamber. The vortex chamber is also in communication with an exhaust duct. A wall that defines at least a portion of the vortex chamber is present and has an opening disposed therethrough allowing for communication between the exhaust duct and the vortex chamber.

Abstract: An apparatus and method for producing a core spun yarn by means of a fluid delivery device is provided. The apparatus substantially comprises a fiber and thread guide means using a fiber guide conduit with a fiber guide surface for guiding fibers and a thread guide for guiding at least one continuous yarn into an inlet orifice of a yarn guide conduit and a fluid delivery device for producing a swirl flow about the inlet orifice of the yarn guide conduit so that the at least one continuous yarn can be spun over by the fibers. The thread guide is either a groove which is associated with the fiber guide surface, a bore disposed below the fiber guide surface, an individual tube-like element, or a tube-like element that is combined with a groove or a bore. The thread guide is introduced in a fiber and thread guide means, with the axis of the groove, the bore or the tube-like element being in alignment with the axis of the yarn guide conduit.

Abstract: An air-spinning arrangement has an opening device having a feed device and an opening roller for opening a sliver into individual fibers. A perforated removal roller receives the opened fibers from the opening roller in the circumferential direction. A conveyor belt conveys the fibers from the removal roller to a nip with a following air-spin nozzle for forming a yarn. The conveyor belt is arranged axially-parallel with the removal roller. A sufficiently close spacing of the conveyor belt from the removal roller is selected such that the fibers conveyed to the removal roller can be picked up by mechanical contact, and the conveyor belt is driven such that it deflects the fibers by approximately 90° and conveys them to the combing location. The air-spinning arrangement allows the formation of a fiber structure that is well suited to the air-spinning process.

Abstract: A pneumatic spinning apparatus (1) for producing a yarn or thread spun from fibres includes a nozzle block with a hollow room in which a spindle is arranged. At least one jet nozzle serves for generating a rotating air stream in the hollow room. Opposite the spindle a fibre guide member is arranged, which in the yarn forming process serves as a false core. A fibre guide duct within the nozzle block merges into the fibre guide. The fibre guide duct presents a variable cross-section along its length.

Abstract: A core yarn manufacturing machine has a spinning unit including a hollow guide shaft member wherein the yarn passage is formed in the axis direction, and a nozzle applies a whirling flow to the tip section of the hollow guide shaft member. A core yarn is manufactured by winding the fiber bundle into the spinning unit, around the core fiber which is also fed, in the tip section of the hollow guide shaft member. The machine has a suction force producer for producing a suction force toward the interior of the yarn passage from the entrance of the hollow guide shaft member, and a core fiber feeding apparatus that feeds to the spinning unit. A control device controls the operation and non-operation of the whirling flow generating nozzle, the suction force producer and the core fiber feeding apparatus.

Abstract: The invention relates to a device for the production of a spun thread (10) from a staple fibre strand (1) by means of air spin method. The fibre guiding element (3c) according to the invention comprises a fibre conveying channel (4) with a fibre guiding surface, whereby the fibre guiding surface ends at a fibre presenting edge (6) and leads the fibres of the staple fibre strand (20) in the form of an essentially flat arrangement lying next to each other. The fibre-guiding surface (18, 18.1, 18.2, 18,3) is configured in such a manner that it comprises a diverting point (17) which causes a deviation of the staple fibre strand (20), whereby the deviation is being provided in such a manner that the free fibre ends (19) of the fibres within the staple fibre strand (20) protrude from said staple fibre strand.

Abstract: A spinning device for producing a spun yarn by a circulating air flow in a housing has an adjustment device (17) for controlling the angular position of the fiber ends wrapped around a spindle head, and in turn, the angular position of the fibers wrapped around the produced yarn, by adjusting a linear component of an air flow into the spinning device as a function of the yarn withdrawal speed, whereby a yarn is produced of a required yarn strength even during a spinning start phase in the process of making the spun yarn.

Abstract: The present invention concerns a spinning method and a spinning apparatus for producing a yarn (13) from fibres (7). In a spinning chamber (2) the fibres (7) are subject to a rotating air vortex (15) and in this process are twisted into a yarn (13) in an inlet opening of a spindle duct (11) of a spindle (12). The fibres to be processed (7) are guided via at least one fibre feed duct (20, 21) into the spinning chamber (2). The present invention proposes that fibres (17), which are not caught into the yarn formation process are eliminated via an exhaust air duct (16), that these eliminated fibres (17) are regenerated, and that the regenerated fibres (17) are fed back into the yarn forming process.

Abstract: The measure for influencing the flow in the yarn guide duct is that the flow in the spindle channel is influenced after the fiber guide surface to the spindle cone and by the inlet opening into the spindle channel by means in such a way that the entrance behavior of the fiber ends and the spreading of the rear fiber ends occurs in weak or suppressed counter-flow or in co-flow and that said means are flow-active connections between the outflow channel and the spindle channel, e.g. passages by means of bores or by using fluid-permeable sintered materials.

Abstract: The present invention provides a spinning apparatus comprising a spinning member U composed of a nozzle a nozzle member for generating a whirling current and a non-rotary hollow guide shaft member, wherein a yarn passing hole 7b near a tip portion 7a of a hollow guide shaft member 7 is formed to be non-circular. The non-circular yarn passing hole near the tip portion of the hollow guide shaft member makes it possible to vary the whirling speed of reversed fibers whirled in a circumferential direction, thereby increasing the amount of hairinesses occurring in a spun-out yarn. Consequently, a soft spun yarn with many hairinesses can be manufactured without reducing the strength of the generated spun yarn.

Abstract: A method and apparatus are disclosed for fabrication of textiles. The method includes the step of passing a yarn or product along a path through a device. The method also includes applying a rotation force to the yarn or product with at least one jet of liquid directed by the device.

Abstract: A top roller unit is arranged on a top weighting arm for a drafting apparatus of a spinning machine, which top roller unit has a holding device and two double top rollers and is arranged at two adjacent spinning stations. A first top roller of a spinning station borders a drafting zone which serves to draft a fiber strand, and a second top roller of a spinning station borders a condensing zone which serves to condense the fiber strand and which is arranged downstream of the drafting zone. The second top roller of each spinning station is driven via a drive by the first top roller, which drive takes the form of an intermediate gear which is common to all the top rollers of the top roller unit. The top roller unit is supported by a housing which encapsulates the intermediate gear.

Abstract: A method for false twist texturing a synthetic yarn, as well as the thus-produced crimped yarn, wherein a false twist is produced on the yarn at a speed of a false twist unit, which exceeds 2.2 times of the yarn speed and is above a saturation limit for absorbing a false twist in the yarn. The overtwisted yarn is set in the false twist zone at a temperature higher than 200° C. In proportion with the advancing speed, the withdrawal speed does not exceed 1.4 times the advancing speed, and is below 1,000 m/min. With that, a false twist textured crimped yarn is produced, which has large and small cross sections with curls and bows, which alternate with one another and have opposite directions of twist.

Abstract: A composite, break-resistant sewing thread having a core of continuous multi-filament, non-stretch high-tenacity synthetic yarn and a cover of drafted staple fibers air-jet twisted around and covering the core for protecting the core from heat and friction during a sewing operation. The yarn is plied.

Abstract: It is an object of the present invention to provide a hairiness controlling device that can start, simultaneously with the start of spun yarn running, stabilizing a spun yarn run through disks. According to the present invention, a rotation speed of each disk 6 is varied depending on a running speed of a spun yarn Y run as a drive drum D rotates, thereby setting the tension of the spun yarn Y at an appropriate value when the spun yarn starts to run.

Abstract: In the case of ring spinning with condensing devices there is a risk that the yarns of the individual cops have a varying degree of hairiness. This can result in faults in the end product, for example a woven fabric. In order to avoid such faults, the ring spinning machine is connected to a monitoring station, in which the yarns are automatically monitored for hairiness; the cops, based on the monitoring results, are then automatically sorted.

Abstract: A method and device for the production of core yarn (63), whereby a core yarn (12) is brought to a fiber slubbing (8) which has been refined in a drafting system before said slubbing is reinforced by twisting. The core yarn (12) is embedded in covering fibers. The fiber slubbing is compressed in a compacting device (22) after the core yarn (12) has been brought to the slubbing and before twisting occurs.

Abstract: Singled fibers from a fiber strand, separated by a rotor, are collected by suction on a continuously moving surface of a perforated belt or rotary drum. The fiber packet is not formed with a twist in this region and, only upon transfer to a downstream region is the twist applied, e.g. by a ring spindle.

Abstract: A false twist texturing machine for the texturing of synthetic threads in one handling position at a time, in which a heating device and a false twist unit are disposed within a false twist zone. In an after-treatment zone are disposed a second heating device and a counter-twist apparatus. In this case a residual twist left in the thread from the false twist unit is removed by the counter-twist apparatus. The counter-twist apparatus is for this disposed in one plane with the second heating device, so that the thread is run substantially in a straight thread path.

Abstract: A drafting frame for a spinning machine, especially a ring-spinning machine can be readily retrofitted with a compaction device adjacent the last pair of drafting rollers if the condensing zone is defined between a clamping location formed by the nip of the last roller pair and a clamping location formed by a number of elements of the compacting device against the upper roller of the last roller pair.

Abstract: A condensing zone for condensing a drafted fiber strand is disposed downstream of a front roller pair of a drafting unit of a ring spinning machine. The condensing zone comprises a stationary sliding surface having a suction slit, over which the fiber strand is transported by an air-permeable transport belt. The condensing zone is bordered on its exit side by a nipping roller disposed on the transport belt. The nipping roller drives the transport belt and is in turn driven by the front pressure roller of the drafting unit. The front pressure roller is, for this purpose, connected with the nipping roller via a drive belt, preferably a toothed belt. The nipping roller and the front pressure roller are arranged on supporting arms which can be spread apart and which tension the drive belt.

Abstract: A condensing zone is arranged downstream of the drafting apparatus of a ring spinning machine, through which condensing zone an air permeable transport belt transports the drafted fiber strand. A cleaning element is arranged at the transporting element, which cleaning element takes the form of, for example, a cleaning roller, and which is pressed using a light pressure onto the transporting belt. The rotation direction of the cleaning roller preferably runs in the opposite direction to the direction of motion of the transport belt. The driven bottom roller of the front roller pair of the drafting apparatus can serve as a cleaning roller.

Abstract: A condensing zone for condensing a drafted, still twist-free fiber strand is arranged downstream of a front roller pair of a drafting unit of a spinning machine. An air-permeable transport belt transports the fiber strand through the condensing zone. The transport belt slides hereby over a stationary sliding surface, in which a suction slit of a suction channel is located. At the end of the condensing zone, the fiber strand is pressed with the transport belt by a nipping roller to the sliding surface. The nipping roller as well as the front pressure roller of the drafting unit are supported in a top weighting arm. A separate pressure spring is arranged each for the top pressure roller and for the nipping roller. It can be provided that the nipping roller is arranged at a holding device, which can be swivelled around a swivel axle, which lies coaxially to the axle of the front pressure roller.

Abstract: Method of and apparatus for bundling fibers of a sliver in the drafting frame of a spinning machine in which a fiber-bundling zone is provided downstream of the last pair of drafting rollers. The fiber-bundling zone can be formed with a transporter for the sliver, e.g. a belt, provided with an array of perforations having a width which is at least equal to the traversing width of the sliver. The suction orifice juxtaposed with the array of perforations of the belt is inclined to the direction of the travel of the sliver and preferably extends over the full width of the traversing motion. The edge of the orifice can be rectilinear or curved.

Abstract: A high efficiency method of producing a high quality knit fabricis diclosed. The method includes the steps of drafting a blended sliver of cotton fibers and polyester fibers in a four roll draffing zone in which the nip to nip spacing in the break zone is no more than 2.5 mm longer than the effective fiber length of the polyester fibers, and no more than 1.5 mm greater than the effective fiber length in the intermediate zone, and at least 7 mm greater than the effective fiber length in the front zone, thereafter spinning the drafted sliver into yarn at a take up speed of greater than 150 meters per minute, and thereafter knitting the spun yarn into fabric.

Abstract: A condensing zone is arranged downstream of the main drafting area of a drafting assembly of a ring spinning machine, which condensing zone is defined on one side by a front roller pair of the drafting assembly and on the other side by a nipping roller which presses a drafted fiber strand against a supporting surface. The peripheral speed of the nipping roller is from 3% to 8% greater than the peripheral speed of the front roller pair. The fiber strand to be condensed obtains thus a lasting draft in the condensing zone.

Abstract: A condensing zone is arranged downstream of the front roller pair of a drafting arrangement of a spinning machine, in which condensing zone a drafted fiber strand is condensed. The condensing zone comprises a sliding surface having a suction slit, which sliding surface serves as a guide for a circulating air-permeable transport belt. The transport belt transports the fiber strand over the suction slit to a nipping roller, which presses the fiber strand and the transport belt against the sliding surface. The perforation of the transport belt presents a risk, namely that fiber fly or other impurities can be deposited between the sliding surface and the supporting surface of the transport belt arranged thereto. For this reason it is provided that the sliding surface has at least one sharp edge, which extends transversely to the transport direction and which scrapes the supporting surface. The sharp edge lies preferably in the area of the supporting surface which covers the suction slit.

Abstract: Flyer drafting arrangements deliver drafted fiber strands, whose width is greater than their height. Because of this, a condensing zone is often arranged downstream of the flyer drafting arrangements, which bundles the respective fiber strand laterally. Up to now, such condensing zones comprised mechanical condensers, which produced very unsatisfactory results. It is therefore provided in the present invention that a pneumatic condensing device is arranged at the condensing zone arranged downstream of the flyer drafting rollers. This condensing device can comprise a suction slit extending essentially in transport direction of the fiber strand, which suction slit is covered by an air-permeable transporting surface which guides the fiber strand.

Abstract: An arrangement and method for spinning a yarn from a plurality of yarn components includes a drafting arrangement, a condensing zone arranged downstream thereof and also a ring spindle which twists all yarn components jointly. The condensing zone has a stationary sliding surface for a perforated transport belt which transports the yarn components through said condensing zone. At least one suction slit is located on the sliding surface, which suction slit extends essentially in a transport direction of the yarn components. The condensing zone is defined on its exit side by a nipping roller, which presses the yarn components and the transport belt onto the sliding surface. The at least one suction slit extends to the nipping point. The yarn components may be a sliver or roving and a core yarn, or two slivers or rovings, which, with or without any core yarn, together form the subsequent yarn.

Abstract: A condensing zone for pneumatic condensing of the drafted, still twist-free fiber strand is arranged downstream of the drafting apparatus of a ring spinning machine. The condensing zone is limited by a delivery roller pair, whose driven bottom roller is a suction roller, which is arranged directly downstream of the front roller pair of the drafting apparatus. The fiber strand loops the suction roller at an angle of at least 45°.

Abstract: A device for producing spun yarn by means of an airflow acting in the area between a sliver guide and a spindle (13) on fibers of a non-twisted sliver (10) drafted and delivered by a drafting arrangement in order to twist the fibers. Thereafter, the sliver (10) is passed through the spindle (13). Outside of an imaginary center line (9) of the traveling sliver (10), the sliver guide is arranged such that the fibers are passed along the inward lying surface of the sliver guide. The sliver guide comprises fiber guide elements (16) spaced apart from each other, which permit the free passage of a core fiber bundle. An improved spinning process, along with high productivity and increased yarn strength is possible by means of the device of the invention. The spinning device can be manufactured and operated cost-effectively.