Abstract: For a changing of spool tubes and packages at an individual spinning unit of a spinning machine having a plurality of such spinning units, it is provided that, when a given filling ratio is reached, the yarn which continues to move to the spool package is disengaged from a cross-winding yarn guide and is subsequently, in the form of final windings, wound onto an area limited in longitudinal direction of the spool package onto the spool package.

Abstract: In the case of a spinning machine for the pneumatic false-twist spinning of staple fibers, it is provided that each spinning point is constructed as a double spinning point for subjecting two slivers to spinning which comprises devices for drafting which is common to both slivers, respective separate devices for pneumatic false-twisting and respective separate devices for winding the yarns onto intermediate packages, and that, in an automatic interconnection, a spooling machine is arranged which rewinds the yarns of the intermediate packages onto normal packages.

Abstract: A spinning apparatus in which moisture can be applied to spinning yarn by a simple apparatus. In a spinning apparatus wherein a yarn is manufactured by introducing a bundle of fiber into a passage for a bundle of fiber of a spindle being rotated at high speeds, a device for supplying water to a center portion of a yarn is provided to face an inlet of the passage for a bundle of fiber of the spindle.

Abstract: In an arrangement for pneumatic false-twist spinning, an intake nozzle, a suction roller and a false-twisting nozzle are arranged between a drafting unit and a withdrawal device in a false-twisting zone. The suction roller is driven to rotate at a circumferential speed which is higher than the delivery speed of the drafting unit and the withdrawal speed of the withdrawal device.

Abstract: In a spinning machine for pneumatic false-twist spinning, a plurality of spinning points are provided which are each equipped with one drafting unit. Two air nozzles are connected behind a pair of delivery rollers of the drafting unit and are pivotable around a separate swivel shaft and are connected by a restricted guidance in such a manner that, by an actuating movement, they can be moved into servicing positions which deviate from one another.

Abstract: In a spinning method in which, after a bundle of fibers has been drafted, the fibers are introduced into a twisting device using an air jet. The fibers are formed into bound spun yarns by the twisting device and are wound on a package by a winding device. The spinning method includes the steps of arranging and doubling at least two spun yarns upstream from where a twisting torque applied to the spun yarn by the twisting device disappears, entangling the spun yarns by the residual twisting torque, and thereafter winding them on a package.

Abstract: An arrangement for producing spool packages serving as feeding packages for twisting, having a control apparatus for interrupting the operation. Sliver detectors arranged in front of drafting units are connected to the control apparatus. At least one yarn detector is connected which is arranged behind air nozzles. It is provided that the control apparatus is equipped with devices for generating a piecing signal, the piecing signal being generated after the yarn detector or detectors has/have responded or, if a sliver detector has responded, after the defect signal of the sliver detector is extinguished.

Abstract: In the case of an arrangement for pneumatic false-twist spinning having air nozzles arranged behind a pair of drafting units, it is provided that the air nozzles lead into a space which is designed as a V-shaped groove which, together with a covering, is completed to form a yarn guiding duct which leads from the mouth of the air nozzles to a yarn outlet opening. The yarn guiding duct is provided with a cross-sectional enlargement in the area adjacent the air nozzle outlets to provide for uniform flow in the duct.

Abstract: An apparatus for producing of real twist-like yarns wherein a guide member is provided within a nozzle block for exerting a turning stream on a fiber bundle moved out of a drafting device and an extreme end of the guide member is directed at an inlet of a rotary or stationary spindle.

Abstract: In an arrangement for pneumatic false-twist spinning having a drafting unit, a pneumatic false-twisting device which follows and a withdrawal device which follows, it is provided that a roller of the pair of delivery rollers is constructed as a hollow roller which has an air-permeable shell surface. In addition, a suction roller is provided between the pair of delivery rollers and the false-twisting device.

Abstract: A spinning apparatus which imparts a turning air stream to an untwisted short fiber bundle drafted by a draft device to twist it to produce a spun yarn. A guide member supporting body having an extreme end projected conically is secured within a nozzle block for imparting a turning air stream to a fiber bundle moved out of a draft device, and the guide member supporting body having one side cut to form a gap adjacent to the nozzle block.

Abstract: In a system for producing yarns comprising a spinning apparatus having a plurality of spinning units, each unit being provided with a winding device, and a twisting machine directly connected to said spinning apparatus to twist a package from the spinning apparatus, a method comprises feeding packages of different kinds of yarns doffed from a group of units obtained by dividing units of the spinning apparatus to the twisting machine at different timing, and supplying them onto trays discriminated by kinds in the twisting machine.

Abstract: A spinning machine is disclosed which includes a plurality of spinning units which each spin two prestrengthened yarn components and guide them together to a double yarn. A movable servicing device is provided which can be applied to the individual spinning units and which, for feeding the double yarn to a spool tube inserted into a spinning unit wind-up device and driven to perform rotations, has a device that can be applied to the spool tube and is equipped with devices for the deflecting of a section of the double yarn into a direction extending approximately in parallel to the axis of the spool tube and for the transferring of the deflected section of the double yarn into the moving range of a driving device rotating together with the spool tube.

Abstract: The present invention relates to a process for start spinning or piercing at least two yarns of fibers, which process includes forming strands for start-spinning or piecing by introducing a continuous filament into each roving, false twisting the strands, assembling the strands at a given point of convergence, cutting each filament upstream of its introducing point, removing the filament from the strands and twisting the strands without the filament to a twisted yarn. This process serves to overcome the problem of breaking at the start of the spinning. Also by the present invention, the problem of breaking while twisting the assembled intermediate yarns to a twisted yarn is avoided by introducing a false twisting of the assembled intermediate yarns, supplementary to the false twisting of the intermediate yarns, before the last twisting.

Abstract: A multi-ply spun yarn having a self-converging property and a method for producing it. In the method wherein fiber is drafted first and introduced into an air jetting twisting device, and then yarns spun out by the twisting device are joined together by a guide member and taken up onto a take-up device, the twisted yarns are joined together after separated by a separating guide.

Abstract: A fasciated yarn is produced that is suitable for making apparel fabric from predominantly non-thermoplastic staple fibers, and which approaches ring spun yarn in properties and appearance but can be produced much more quickly and simply. The fasciated yarn comprises vacuum spun yarn consisting of fibers including core fibers and wrapper fibers, the wrapper fibers being predominantly individual fibers although having some groups of wrapper fibers. The groups of wrapper fibers appear as non-uniform, non-consistent groupings and provide a relatively smooth appearance. The wrapper fibers are wrapped at a helix angle of about 30.degree. (e.g. about 30.degree.-50.degree.), and about 20-30 percent of the fiber mass comprises the wrapper fibers. The wrappers are essentially devoid of auger or corkscrew appearance. The core fibers are essentially parallel staple fibers. The wrapped and core fibers have the same dyeability.

Abstract: In an arrangement for false-twist spinning, a yarn guiding element is arranged between a drafting unit and a false-twisting nozzle which moves in the travelling direction of the yarn at a speed which is higher than the delivery speed and the withdrawal speed.

Abstract: An apparatus for producing a spun yarn comprising drafting units, delivery rollers and spinning devices disposed between the front rollers of each drafting unit and the corresponding delivery rollers. The spinning device guides a sliver drafter by the drafting unit along a substantially straight line and blows air against the running sliver so that some of the component fibers in the circumference of the sliver are fluffed out and caused to wind around the fibers forming the core of the sliver, and the circumferential speed of the delivery rollers is set to be equal to or higher than that of the front rollers.

Abstract: A cleaning device for cleaning a nozzle in a spinning apparatus in which the nozzle unit is supported movably and a suction pipe for sucking yarn waste is oscillatingly supported so that a suction opening of the suction pipe can be moved to a gap between the draft part and the nozzle unit moved away from the draft part.

Abstract: In the case of a process for the splicing of the ends of two double yarns during a piecing operation at a spinning unit, it is provided that either the ends to be spliced are prepared such that the spliced point is a thin point, or that the spliced double yarn is pneumatically strengthened in the area of the spliced point.

Abstract: In a spinning device or a yarn splicing device, respective ends of first and second yarn portions are transferred toward respective first and second untwisting devices. An untwisting operation of the second untwisting device is started and continues for a first time period. An untwisting operation of the first untwisting device is started at the lapse of the first time period.

Abstract: An air spinning device with an injection nozzle and a twisting nozzle is adjusted to the highest possible delivery speed for a desired yarn quality by predetermining the desired spinning tension of the yarn. According to the predetermined spinning tension, the highest possible delivery speed is regulated by changing the injection nozzle pressure and/or the spinning draft. Several spinning stations are installed on the air spinning device. At the spinning station, a measuring device to determine the yarn quality is installed between the twisting nozzle and the draw-off rollers. The measuring device is connected to adjusting devices of at least one spinning station. When the yarn quality is changed, the measuring device, together with the adjusting devices influences at least this spinning station.

Abstract: In an arrangement for producing packages, which are used as feeding packages for twisting, it is provided that, directly in front of a cross-winding device of a wind-up device, a processing device is arranged which is controlled by yarn detectors. The yarn detectors monitor one yarn resepctively, which together form a double yarn, which is wound on the package. A yarn separating device or a device for connecting the two yarns is used as the processing device.

Abstract: The delivery roller pair are made with continuous uninterrupted cylindrical surfaces so that air flows on the input side converge in the nip and then flow from the central zone thereof to opposite end zones. In addition, the air flows on the output side flow from the end zones towards the central zone. The suction nozzle is disposed downstream and in alignment with the nip so as to receive the fiber material for spinning into yarn.

Abstract: In a spinning machine having a plurality of spinning units, which each produce a package having a double yarn, which is used as a feeding package for twisting, and having devices for carrying out the piecing, it is provided that a suction gripper is constructed such that it can simultaneously take in two yarns from false twisting elements, which are arranged at a distance from one another.

Abstract: In the case of a process for producing packages used as feeding packages for twisting, it is provided that two prestrengthened yarn components are wound up side-by-side as a double yarn. If one yarn component breaks, the winding-up is interrupted. The unbroken yarn component is gripped and held ready at a given point so that it may be taken up for a piecing and wound off the partially wound spool, while taking along the broken yarn component from the partially wound spool.

Abstract: Method and Apparatus for forming a package including a steps of drafting and twisting a raw sliver to form a spun yarn, taking up at least two spun yarns in a paralleled state into the same package, and supplying the thus wound package directly to a two-for-one twister disposed in continuity with the spinning device. The spinning device and the two-for-one twister are connected to each other by a conveyor for feeding the packages from the spinning device and by a yarn supply package replacing device.

Abstract: In a process and an arrangement for picking up a yarn end of a spool during piecing at a spinning unit which produces packages with double yarns which are used as feeding packages for a twisting operation, it is provided that, in the case of a yarn breakage, the winding-up and the spinning operation is interrupted in such a manner that the unbroken yarn of the double yarn is held in a yarn pick-up position, from which it is picked up during the piecing by means of a suction gripper which can be applied to the yarn pick-up position. After an unsuccessful piecing attempt, this suction gripper is applied to the circumference of the spool in order to still be able to take up the double yarn even then. In the event of a double yarn breakage, the suction gripper is movable to the circumference of the spool yarn seeking position, without first moving to the yarn pick-up position.

Abstract: A draft device in a spinning machine comprising a pair of back rollers, a pair of middle rollers each provided with an apron belt, and a pair of front rollers. An outer peripheral part of the driving-side of middle roller is formed of a rubber.

Abstract: Method and apparatus are disclosed relating to forming yarn by "vacuum spinning". A spinning nozzle assembly is provided which includes two axially aligned sections, each formed with a through passageway. Adjacent facing surfaces of the sections define a continuous radial slot through which air flow may be directed. The axially aligned sections of the nozzle are, in one exemplary embodiment, telescopically received within a sleeve mounted for rotation within a housing. The nozzle sections may be adjusted axially relative to each other to alter the dimension of the radial slot as desired, for example, in accordance with a predetermined yarn count.

Abstract: In the case of a process for producing a twisted yarn from slivers that are drawn to the desired size and subsequently are prestrengthened by means of pneumatic false twisting, it is provided that the fiber ends in the form of helixes are wound around the core with such a steep slope that, during the twisting, the fiber ends that were previously wound around the core are wound off the core as much as possible.

Abstract: In a process and an arrangement for the piecing of a double yarn after a yarn breakage at a spinning unit of a spinning machine, which forms a double yarn from two prestrengthened yarns, which is wound onto a spool package, it is provided that, for a piecing, a newly spun double yarn is connected by means of splicing with an end of the double yarn withdrawn from the spool package, in which case, before the splicing, both double yarns are prestrengthened by being provided with a twist.

Abstract: In the case of a process for stopping and restarting a machine for pneumatic false-twist spinning, it is provided that the start-up time and the slow-down time of the main motor are controlled to preselected values, so that the switching-on and switching-off operations for air nozzles may take place as a corresponding function.

Abstract: An operation starting method for a spinning machine of the type wherein a draft device, an air jetting nozzle and a false twisting device of the nip belt type are disposed in this order, constituted such that, in a condition of the false twisting device wherein belts are held in contact with each other at a nip point, when operation of the spinning machine is started, an air flow directed toward the false twisting device is produced on the air jetting nozzle side of the false twisting device while another air flow directed away from the false twisting device is produced on the opposite side of the false twisting device to the air jetting nozzle.

Abstract: An apparatus for producing a spun yarn comprises a rotary pipe having a sliver path for passing therethrough a sliver forwarded from a front roller of a draft device, a rotary plate formed in an integral relationsip at a location of the rotary pipe spaced from an entrance of the rotary pipe, and a casing for covering the rotary pipe and the rotary plate. The casing has a guide path formed therein for introducing and guiding a sliver from the front roller to the entrance of the rotary pipe and guide path has a dam member disposed therein for introducing a sliver of a substantially flattened configuration forwarded from the front roller.

Abstract: In a process and an arrangement for piecing an air-spun yarn, it is provided that the newly spun yarn end is gripped and is fed to a yarn connecting device, in which case it is brought into the range of action of a yarn storage device which is connected in front of the yarn connecting device. This yarn storage device is able to be activated when the yarn connecting device is operated and to store the then supplied yarn in several loops in such a manner that, during and after the yarn connecting, the continuously supplied yarn is still taken in by the yarn storage device until the excess length of yarn existing between the inlet of the yarn storage device and the partially wound spool is used up by driving the partially wound spool at a winding speed which is higher than the operating speed.

Abstract: In a process for producing packages used as feeding packages for twisting, onto which two prestrengthened yarn components are wound side-by-side as a double yarn, it is provided that, when one of the two yarn components breaks, the other yarn component is cut in such a manner that the lengths of the two yarn components are at least approximately the same. As an alternative, it is provided that, when one yarn component breaks, the partially completed package is stopped, before the broken end has moved onto the partially completed package.

Abstract: In the case of an air nozzle for pneumatic false-twist spinning having several parts arranged behind one another in moving direction of the yarn, it is provided that the part which is arranged behind the part containing the compressed-air ducts, in moving direction of the yarn, is made of a harder, more wear-resistant material and has a smaller diameter than the preceding part.

Abstract: In a spinning machine having a plurality of spinning units for producing packages used as feeding packages for twisting which have two prestrengthend yarn components, a combined quality value of two yarn components is monitored and, in the case of a quality defect, the spinning operation is interrupted, the time of the interruption of the spinning operation being coordinated with the time of the stopping of the partially wound spool in such a manner that a yarn end, which is connected with the stopped partially wound spool, is located at a given position.

Abstract: A spinning apparatus which includes a drafting device, a twisting device and a take-up device is constituted such that the spinning apparatus further includes a guide device for guiding the fiber bundle in the separated condition in a plurality of rows and the twisting device includes a plurality of rows of twisting mechanism which can twist a plurality of rows of fiber bundle at a time.

Abstract: A spinning apparatus of the type which includes a large number of spinning units provided in a juxtaposed relationship, and a yarn splicing bogie for traveling along the spinning units to effect a yarn splicing operation for the spinning units. Each of the spinning units includes a drafting device, an air jetting nozzle for applying a twist to a fiber bundle drafted at the drafting device, and a winding device for winding a yarn spun out from the air jetting nozzle, and a yarn splicing device on the yarn splicing bogie is formed as a pneumatic yarn splicing device.

Abstract: A belt type false twisting device for a pneumatic spinning apparatus in which a fiber bundle is nipped between a pair of endless belts running in an intersecting relationship in mutually different directions to impart false twists to the fiber bundle. A pulley around which each of the endless belts extends is supported for rocking motion around a support shaft.

Abstract: To improve the efficiency of a rotating air layer produced by an air injection nozzle and rotating in a substantially cylindrical space, the rotating air layer being intended to rotate a twisted fiber structure introduced through an inlet duct, there is provided a tube extension at the inlet duct. This tube extension forms a guide for the air flow injected tangentially and at an inclination by the air injection nozzle with respect to the direction of travel of the twisted fiber structure. As a result of this guide, the rotating air layer can form before it engages or contacts the twisted fiber structure. As a result there is increased the rotation of the engaged twisted fiber structure per unit length thereof, resulting in increased strength of the twisted fiber structure and the yarn ultimately produced therefrom with low air consumption.

Abstract: A spinning apparatus comprising a drafting device, an air jet nozzle and a false twisting unit including a pair of endless belts lying in surface contact with each other at a yarn nip point, the drafting device, air jet nozzle, and false twisting unit being located in a path of yarn travel in the order named, the air jet nozzle and the false twisting unit being both movable away from the path of yarn travel, the air jet nozzle and the false twisting unit being movable to and away from each other.

Abstract: A method for winding a fixed length of yarn on a yarn-supply package in an apparatus connecting an automatic winder or an innovation spinning machine having a winder with a two-for-one twister. The method comprises dividing a single yarn-supply package transferred from a winder side to form a plurality of twist-yarn packages on the two-for-one twister side.

Abstract: Vacuum spinning of yarn produces yarns having good properties, and which may have a wide variety of different effects and constructions. A core filament yarn may be fed into operative association with a nipped sliver or roving, and then fed to a perforated rotating hollow shaft operatively connected to the vacuum. The core filament yarn may be a full stretched textured yarn, which is placed under tension and while under tension is dragged over a sharp edge of nonconductive material, and after the tension is relieved develops crimp. This causes individual fibers to be repelled, and provides for intermixing of the nipped sliver or roving fibers and the core filament yarn fibers. Alternatively the filament yarn may be acted upon by draft rollers before the entrance to, and after the exit from, the hollow rotating shaft, to apply a force that breaks up to about 20% of the fibers. The yarns produced utilizing the broken fibers has a spun-like appearance.

Abstract: To piece with a spinning device having a pneumatic twisting unit, a yarn end is back-fed from an output side, through the twisting unit, to drawing equipment, and then inserted laterally into a pair of drawing unit output rollers, from where it is drawn off through the twisting unit in the form of a continuous yarn with a rove being incorporated into it. During the back-feeding of the yarn end to the twisting unit input side, the yarn end is conveyed to a grasping device located at the side of the drawing equipment. The grasping device pulls the yarn end for subsequent insertion into the pair of output rollers past such rollers until such end is alongside the drawing equipment. A yarn presenting device is provided to convey to the grasping device the yarn end leaving the twisting unit input side.

Abstract: A two-component yarn is created from a fiber component and a component consisting of a filament yarn, in which the fiber component is formed by a drawn sliver that is prestrengthened by means of pneumatic false-twist spinning and is twisted together with the filament yarn.

Abstract: In the case of an arrangement for producing staple fiber yarn that is first prespun on an air spinning machine and that subsequently is finish-spun on a simplified ring spinning machine, it is provided that the air spinning machine and the ring spinning machine, by means of a conveying device for the spools receiving the prespun yarn, are connected to form a machine system, the ring spinning machine of which and the air spinning machine of which each have a number of spinning points that are coordinated with one another.

Abstract: In the case of a process for piecing at a spinning unit that is used for producing feed spools consisting of multiple-wound, prestrengthened slivers for a subsequent twisting operation or the like, it is provided that first the supply of the drafting roller device is started, after which the slivers are sucked into the pneumatic false-twisting devices, are guided through them and are then jointly gripped at the outlet of the false-twisting devices, are placed in a withdrawal device and are then fed to a winding-up device.