Abstract: In order to incorporate a weighting cord into the curtain without hindrance, not only is a bead array of spaced weighting bodies employed but this bead array is also surrounded by a textile tube which is to provide a cord surface substantially free of discontinuities. To produce the weighting cord economically, it is proposed to make it as a yarn composite using a spinning procedure. Here, the bead array constitutes a yarn core extending in axial direction of the yarn, and spun fibers are wound around the yarn core thereby generating a tube-like spun fiber coat.

Abstract: This invention relates to a spinning installation for making fiber spun yarns, the yarns comprising a central core of discontinuous fibers covered with an external sheath also of discontinuous fibers. The fibers forming the core and the sheath come from a common drawing system at the outlet of which they are projected onto two condenser elements. The assembly is subjected to the action of a false twist spindle. The condenser element on which the fibers forming the core are projected comprises a rotary guide associated with a mobile roller which blocks the extension of twist communicated by the false twist spindle.

Abstract: A method and apparatus for producing thread or yarn-like material by electrostatically flocking it or covering it with fibers. Grounded base or carrier threads that are provided with adhesive are moved through an electrostatic field of high voltage, where the surfaces of the carrier threads are flocked all the way around with pretreated short fibers (flock material). During the course of producing the flocked thread or yarn, selective lengths of the carrier threads are nonuniformly flocked in an irregular sequence, with the flock material, in different flock patterns.

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: An improved pneumatic spinning machine of the type which includes a draft device composed of a plurality of pairs of rollers, and an air injecting nozzle for producing whirling flows of air to act upon a bundle of fibers fed from the draft device. A front roller of the draft device has an annular air escaping groove formed on a circumference thereof.

Abstract: Vacuum spun yarn is produced that has strength property approaching that of ring spun yarn, and significantly greater than air jet spun yarn, and may be produced at speeds greatly in excess of production speeds for ring spun yarn. An elongated hollow shaft has a through-extending passageway from a first end to a second end thereof, with a portion of the shaft adjacent the first end being perforated (e.g. four equally spaced perforations). The perforations shaft in the direction of the second end from the through-extending passageway, and a generally spherical vacuum reservoir is formed in the shaft in communication with the passageway and perforations. The portion of the passageway between the shaft first end and the vacuum reservoir is significantly larger in cross-sectional dimension than the portion of the passageway from the vacuum reservoir to the second end of the shaft.

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

Abstract: A composite rope obtained by a process comprising(1) impregnating a fiber core of a reinforcing fiber bundle with a thermosetting resin,(2) coating the outer periphery of the resin-impregnated fiber core with fibers, and(3) curing the thermosetting resin with heat.

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: The apparatus for producing two-component thread comprises a twisting mem to which the two components of the two-component thread are fed, and means for severing one of the components as the feed of the second component ceases, including a hollow cylinder operatively connected to a drive and having an annular slit made therein, with at least one flat knife accommodated in the internal space of the cylinder in the area adjoining the annular slit.

Abstract: The apparatus comprises a stretching unit (S) delivering two stretched fiber rovings (4, 5). One fiber roving (4) serves as the core for the wrapped yarn to be produced and runs to a twist-imparting device (6, 7). The fibers of the other fiber roving (5) are transferred to a moving fiber feeding and holding surface (9) constituted by a perforated peripheral surface of a hollow disk (10). This surface (9) comes into contact with the core (4) at a point (C) in front of the twist-imparting device (6, 7). At this contact point (C), the fibers fed on the surface (9) are seized by the rotating core (4) and wound up. At the contact point (C), a fiber catching device (12) is likewise arranged, having an air-permeable surface (11) behind which a vacuum is maintained.

Abstract: Yarn having properties approaching that of ring spun yarn is produced by vacuum spinning, including directly from sliver. The elongated hollow shaft of the vacuum spinning apparatus has a vacuum reservoir, or interior chamber, that is generally in the shape of a right circular cone, and the interior passageway of the shaft from the first end thereof to the interior chamber can have the form of a right circular cone frustum. The perforations operatively connected to the interior chamber have a generally wedge-shape. The perforations and the passageway sections between the first end of the shaft and the perforations are dimensioned so that they allow sufficient air flow to achieve optimum fiber wrapping action.

Abstract: Method of manufacturing core yarns from fiber bands. A part of the fibers of a fiber band is released from the fiber band and is deflected. These deflected fibers do not participate in the spinning process, but are wrapped around the twisted core in a plurality of reinforcing winds. The method of the invention overcomes the problems of manufacturing yarns without requiring expensive and complicated mechanical elements.

Abstract: A method of obtaining a core-spun yarn, according to which the fibers are subjected to a momentary false twist, and elementary fibers are projected on the spun yarn in the upwardly twisting area by means of a movable surface. According to the invention, all of the fibers (core and sheath) are subjected to the action of a common drawing system. After drawing, part of the fibers are delivered to the guiding surface to form the sheath while the other part of the fibers, which will form the core, is moved away from said surface and returned in contact therewith downstream of the zone in which the first part of the fibers are delivered. It is possible with this method to obtain, from only one supply, a variety of yarns of which the core and sheath can be composed of fibers of the same or of a different nature.

Abstract: A twist is imparted to fiber slubbing (1) exiting from drawing rollers (2) by means of twister (4). Oriented, parallelized fibers (F) are applied to rotating fiber slubbing (1) in front of or within twister (4), the fibers (F) wrapping themselves around core thread (1). Because of these fibers (F), the twist of fiber slubbing (1) no longer unravels completely after twister (4), so that a spun thread (12) of great strength is obtained. The feed of fiber (F) to fiber slubbing (1) occurs by means of rotating feed element (8). It has a circular perforated surface (9), behind which a negative pressure is maintained to keep fibers (F) on the surface. The oriented, parallelized fibers (F) exit from drawing rollers (10) and are conveyed to perforated surface (9). The rotating fiber slubbing (1) comes into contact with surface (9) and then draws fibers (F) from surface (9).

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 fiber sliver is drafted to a yarn count in a drafting mechanism and is fed to a false twist unit with a sliver width B1 of 10 to 19 mm. In accordance with the method, by means of the width B1, the fiber sliver leaving the delivery roller pair is divided into a yarn core rotated by the false twist member with a spinning triangle of the width B2 and into edge fibers delivered thereto. The edge fibers are taken up by the rotating yarn core in the suction passage of the false twist unit. The taking-up of the edge fibers occurs in that the front ends of the delivered edge fibers are caught by the rotating yarn core in the region of the narrowest portion of the suction passage and are wound about the yarn core with the same rotational direction as the fiber core but with a substantially larger inclination until the rear end of the edge fibers is wound into the yarn core in the spinning triangle.

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: Apparatus for making a high-strength yarn from a drawn roving comprises a twisting device for twisting the roving is as well as a separate winding device, which serves to wind protruding fiber ends around the roving and comprises a guide gap which is tapered transversely to the direction of travel of the roving in said gap and is bounded by sliding surfaces in contact with the roving.

Abstract: The manufacture of yarn is disclosed by a machine which coats a filament with synthetic plastics material and then applies discrete textile fibres to the tacky layer. The fibres are obtained by tearing a sliver using toothed wheels. All those parts of the machine which are not essentially in the same environment as the wheels are on the opposite side of partitioning to the wheels. Thus the parts which are separated from the wheels by the partitioning are in a substantially fibre free atmosphere, and can be in a closed, pressurized room thus minimising the flow of fibres to these parts.

Abstract: An unusual spun yarn is produced by feeding fibers or a sliver or roving into the interior of a hollow shaft. The shaft includes a perforated portion, and a vacuum is applied at the exterior of the shaft. The shaft is mounted for free rotation about an axis coincident with the direction of movement of the fibers through the shaft, and blades extend radially from the perforated portion of the shaft. When the rotates at high velocity under the influence of the vacuum it produces the unusual spun yarns.

Abstract: Method of and apparatus for making yarn with a core, wherein the free fibers are tightly attached to the core and are wound around it. The core of fibrous material is fed by a pair of feeding rollers, the core being fed through a first jet for the formation of wrapping of fibers. In the first jet, fibers are laterally driven in by an air stream. Simultaneously with the laterally led in fibers in the first jet for the formation of wrapping, there is driven in an additional core thread, which moves with the linear velocity of the core. Such additional core thread is made of fibrous material of staple fibers or is made of filament material. The laterally led in fibers and the additional core thread have a mutual trajectory of movement and are driven in the jet for the formation of wrapping by the suction of the tangentially fed same jet air stream.

Abstract: A multicolored spun yarn is provided which comprises a substantially untwisted bundle of core staple fibers and a plurality of staple fibers wrapped helically around said bundle of core staple fibers; the bundle of core staple fibers comprises a plurality of staple fibers which are different from each other in color tone or in dyeability, and the yarn having at random intervals portions wherein staple fibers of one kind cover up staple fibers of another kind, and the method of manufacturing the same.

Abstract: Method for producing a fiber spun yarn of the type in which parallelized elementary fibers are joined to a textile core, subjected to a false twist, said fibers being projected on the core, upstream of the false twist spindle.According to the invention, in the fibers projection zone, the core is guided into a channel with an open face which is situated in facing relation to the elementary fibers projection zone and the surface of which is subjected to a flow of fluid tending to exert a pulling force on the end of the fibers.

Abstract: The invention relates to a process and device for making a spun yarn of fibres comprising an internal core which consists in subjecting the yarn to form the core to a momentary false twist by means of a spindle and projecting elementary fibres onto this yarn. Such elementary fibres are projected by means of a mobile guide surface on which the fibres are delivered tangentially, the core likewise being displaced tangentially with respect to the guide surface in a direction concurrent with the direction of delivery of the fibres.

Abstract: The present invention relates to a process for making a core spun yarn, wherein elementary fibres are projected onto a yarn, the yarn being subjected to the action of a false twist spindle. The projection of the fibres is obtained by means of a mobile guiding surface on which the fibres are delivered tangentially and are maintained paralleled and flat. Furthermore, the core is delivered tangentially on the paralleled fibres obliquely and in the direction of displacement of said fibres. The invention also relates to a device for carrying out this process.

Abstract: Friction spinning apparatus for producing a composite yarn has a groove or recess formed in at least one of the friction spinning rollers, to receive a strand guide tube which can then guide a core strand directly to the yarn formation line substantially at the nip between the rollers.

Abstract: An apparatus for electrostatic spinning of textile fibers is disclosed. The apparatus includes a twister electrode and a rapid spinning ground electrode, more particularly, a spinning ground electrode having an insulated tip which is tapered and fluted so as to positively drive or rotate the yarn tail extending from the twister electrode.

Abstract: Method and apparatus for the production of fancy yarns from falsely twisted core and fancy threads. Staple fibers are drafted by a cylindrical drafter; the core and fancy threads are false twisted by a hollow spindle. At least one drafting of staple fibers are supplied upon the falsely twisted core and fancy threads by means of a pneumatic transporting channel. The speed of the fibers constituting the fancy threads is greater than the peripheral speed of the rollers delivering the core thread. If desired, two rovings of staple fibers may be used, the two rovings having different titre in a ratio of 1:10 and having different lengths of the fibers in a ratio of above 1:2, both rovings entering from one drafter, the two rovings after being drawn being supplied together to the combined false twisted core thread and fancy thread.

Abstract: In the production of a covered core yarn in pneumatic spinning in a stationary, tubular spinning chamber, an endless thread (2) is covered with staple fibers (1). The staple fibers (1) are brought together with the core thread and are spun overtwisted in a twist blocking device (12). Due to a subsequent partial untwisting of the roving, reverse tying-in of the staple fibers around the core thread is made possible. The staple fibers (1) which are pulled in band form into a turbulence generator (7) from a pair of supply rollers (4) are radially spread successively under negative pressure before twisting by the turbulent air current (17). The turbulent air current (17) flows tangentially in and out through the guide screw of the twist blocking device (12). In one embodiment, the staple fibers (1) are spread in high draft in an eccentrically arranged fiber spreading chamber (8) of the turbulence generator (7) by eccentrically acting turbulent air currents.

Abstract: A friction spinning apparatus comprises two rollers in closely spaced parallel arrangement which define between them a yarn formation zone at an elongate gap along the rollers and a feed duct which extends into the gap so as to feed fibres directly into the gap in such a manner that they can fall directly onto the yarn. The feed duct is formed as two separate parts slightly toward the roller which turns into the gap so as to increase the proportion of fibres joining the yarn at the junction with that roller, one of which includes a planar jointing face of the feed duct and a co-planar first side wall of the fibre feed duct passage in the feed duct, and the other is a complex part defining the other walls of the fibre feed passage as well as a second planar jointing face.

Abstract: A friction spinning apparatus comprises two rollers in closely spaced parallel arrangement which define between them a yarn formation zone at an elongate gap along the rollers and a feed duct which extends into the gap so as to feed fibres directly into the gap in such a manner that they can fall directly onto the yarn. The feed duct is biassed slightly toward the roller which turns into the gap so as to increase the proportion of fibres joining the yarn at the junction with that roller.

Abstract: An improved process for making a composite yarn of staple fibers commingled with bulked continuous filaments comprises passing a yarn of crimped continuous filaments while under tension between nip rolls which advance the yarn into a splaying zone where the filaments are permitted to contract and splay of their own accord into an open three-dimensional filament network into which airborne staple fibers are projected for commingling with the filaments after which the open network is collapsed and the composite yarn is withdrawn at a slightly lower speed than that at which the nip rolls advance the feed yarn.

Abstract: The object of the process is to produce a yarn comprising a core of continuous filament and a sheath of staple fibers. The staple fibers are delivered to a suction surface comprising a perforated collecting surface exposed to relative suction in a suction zone, the fibers being conveyed in a current of air moving virtually at right angles to the surfaces of two counter-rotating friction discs having narrowly spaced opposing faces defining a gap. From the suction zone, the staple fibers are transferred, generally at right angles to the axis of the current of air, into the gap. The continuous filament is united with the staple fibers in the suction zone, and both components are twisted in the gap between the counter-rotating friction discs.

Abstract: A composite yarn comprising a component of staple fibres and a component formed by a continuous strand is spun on a friction spinning apparatus. Staple fibres are fed to a twisting zone where the fibres are twisted to form a staple strand with one end open. The continuous strand is joined with the staple strand at a position within a portion of the staple strand which is in the process of being twisted, and such that fibres are joined with the staple strand both upstream and downstream of the joining position and some fibres join with the staple strand on both sides of the joining position. In this way a yarn is formed with some fibres forming an inner core twisted with the continuous strand, with some fibres forming on outer sheath around the core and continuous strand and some fibres having part of their length in the core and part in the sheath.

Abstract: The invention provides a process and apparatus for forming a yarn of at least two separate continuous filaments and a plurality of fibers. At least one of the filaments is of a partially oriented thermoplastic material such that when a twisting force is applied, a retained twist is obtained due to inter-molecular slippage in the partially oriented filament.

Abstract: A jeans fabric consists of polyester fibers and of cotton in which the filling yarn is a polyester yarn or a polyester fiber/cotton mixed yarn and in which the warp has been dyed and the filling has not been dyed. At least the warp consists of a sheath-core staple fiber yarn manufactured by the open end sheath-core friction spinning process. The polyester fibers are disposed predominantly in the core, the cotton in the sheath of the warp yarn. The jeans fabric combines good wear resistance with an attractive handle.

Abstract: Apparatus for making a yarn comprises two juxtaposed, closely spaced apart suction drums which rotate in the same sense and a delivery duct which protrudes into the triangular space between the suction drums and has an exit adjacent to the suction zones and serves to deliver through said exit singled covering fibers to a drawn roving, which has been delivered by a drawing frame disposed to said triangular space at one end thereof. The yarn thus formed in the triangular space between the suction drums is withdrawn by withdrawing means disposed from said triangular space at the other end thereof. In order to improve the wrapping of the roving with the covering fibers, the surfaces of the suction drums are rough and have a microstructure which will prevent a positive coupling to individual covering fibers and has a peak-to-valley depth up to one-half of the yarn diameter.

Abstract: In apparatus for making a yarn, two closely juxtaposed suction drums are rotated in the same sense and have suction zones which define a generally triangular space. A drawframe supplies a roving to one end of said triangular space. Withdrawing means are provided for withdrawing a yarn formed from said roving from the other end of said triangular space. Means are provided for supplying covering fibers to a predetermined length zone of said triangular space in a direction which is transverse to the axes of said drums so that said covering fibers cover said roving. To improve the twisting of the roving, means for twisting the roving are provided between the drawframe and said predetermined length zone of said triangular space.

Abstract: A process for the production of a core/mantle yarn, in which a core thread is continuously conducted through a spinning zone in a gap formed between two adjacent and oppositely moving surfaces; staple fibers are fed into the path of the core thread and come into frictional contact with the moving surfaces in said zone to spin the staple fibers about the core thread; the core thread is preferably stretched during the spinning in order to bring about a defined, predetermined elastic stretch of the core thread in the spinning zone; and the core thread has a roughened surface which may be obtained by using a staple fiber yarn or thread obtained by texturizing, weaving, twisting, etc. The invention is especially characterized by an improved adherence of the fibers of the mantle to the core thread by pre-coating the core thread with an adhesive, or preferably by preapplying colloidal silicic acid to the core thread.

Abstract: A process and arrangement for the covering of a spinning carrier or foundation, in particular yarn, threads, filaments with fiber material, in particular wool, cotton, synthetic fibers, in which the spinning carrier is pulled past a collector drum for the fiber material at a spacing therefrom and into rotation. As the collector drum there is directly employed the pickup of a carding device, and the spinning carrier is pulled past in an axial direction at a distance from the surface of a pickup carrying the fiber nap of the fiber material.

Abstract: A method and apparatus for producing core yarn comprising introducing yarn constituting the core through a supply channel into a stationary spinning chamber, leading the yarn inside the chamber along a straight line to staple fibres rotating in a plane perpendicular to the axis of the chamber, joining and wrapping the core with the staple fibres and guiding the finished yarn out of the chamber to take-up rollers. The spinning chamber comprises two cylindrical chambers with different diameters adjoining one another and in the cylindrical chamber of greater diameters there are tangentially disposed air guide vanes, a channel for discharge of the finished yarn, and a channel for supplying the staple fibres. The outlet of the channel for supplying the staple fibres is disposed above the inlet of the channel for discharge of the finished yarn and above the air guide vanes. In a widening portion of the cylindrical chamber of smaller diameter the inlet of the channel for supplying the yarn is provided.

Abstract: Apparatus for manufacturing a yarn comprises two juxtaposed, closely spaced apart vacuum drums, which rotate in the same sense and have vacuum zones that adjoin the triangular space between the drum. A drawing frame delivers a drawn sliver at one end of said drums to said triangular space, in which the sliver is twisted to form a yarn, which is then withdrawn by means provided at the opposite end of the drums. To ensure a uniform quality of the yarn and to enable the yarn to be withdrawn at high speed, at least one additional roller drawing frame is provided, which has a delivery end disposed over the triangular space and can be operated to deliver wrapping fibers in the form of at least one stream of drawn fibers moving transversely to the longitudinal direction of the drums to the sliver, which extends in the longitudinal direction of the drums.

Abstract: Apparatus for the open-end spinning or round-about spinning of a twisted thread from individual, discrete fibers using a known combination of paired rollers or drums, preferably air-permeable, perforated rollers or sieve drums cooperated with suction means within the rollers or drums to produce a line of thread formation extending longitudinally within the wedge-shaped nip formed by the rollers or drums, and further including a feed channel to supply individual fibers into the nip for twisting by the rollers or drums, and means to take off the twisted thread at one end of the nip. The apparatus is adjusted according to the invention to widen the nip in the plane of the thread forming line and in the direction of the thread take-off. Two equivalent adjustments of the nip lead to a spun thread of higher strength and better uniformity.

Abstract: A process and apparatus for producing a thread from staple fibers by the open-end or round-about spinning methods wherein the individual fibers are transported by an air stream to the thread forming zone in the nip between two air-permeable rollers with suction applied from within the rollers, characterized by the use of a fiber-transporting air stream directed at an angle of impingement with reference to the thread forming zone of less than 45.degree., preferably 10.degree. or even less, with a vector of movement of the air stream being counter to the thread draw-off direction. An improved thread or yarn product is obtained by this process, being more compact and free of loose fibers.

Abstract: The present invention provides a process and apparatus for manufacturing yarn products comprised of an inner core of fibers and an outer layer of fibers. In the process, first fibers have a pre-twist imparted thereto to form a strand which becomes the inner core of the yarn and the pre-twist is retained by passing the yarn between two pinch points. While between the two pinch points, second fibers are juxtaposed to the strand and any untwisting tendency by the inner strand will tend to twist the outer layer of fibers. Optionally, the yarn may undergo a further twisting operation while between the two pinch points after the second fibers have been deposited.

Abstract: Yarn spinning machinery and process utilizing a pair of perforated sieve belts, cylindrical sieve drums or hyperboloid sieve drums for twisting staple fibres at a line of yarn formation wherein the sieve members are moving in opposite directions while air currents are drawn through the sieve members on opposite sides of, and in opposite, twist-assisting flow directions, the line of yarn formation.

Abstract: An improved method for commencing the yarn forming operation of a fasciated yarn and an apparatus for carrying it out thereof. In the apparatus for manufacturing a fasciated yarn from a bundle of fibers suppled from a supply mechanism into a yarn forming mechanism provided with a fluid nozzle, when the yarn forming operation is commenced, the distance between the downstream nip point of the fiber bundle supply mechanism and a twisting point of the fluid nozzle is shortened in a condition shorter than a predetermined distance such as an effective fiber length of a material fiber, and after completion of such initial yarn forming operation, the above-mentioned distance is gradually or stepwisely enlarged to the distance wherein a normal yarn forming operation is carried out. Such shortening and enlarging the above-mentioned distance is carried out by displacing the fluid nozzle and/or changing the position of the downstream nip point of the fiber bundle supply mechanism.

Abstract: This present invention relates to a spun yarn having novel structure and a method of producing the same. The spun yarn of the present invention consists of a number of fibers arranged in a predetermined direction and twisted together, one end of which fibers is spirally wound around the surface of the yarn. The yarn of the present invention is spun by successively passing a sliver through a pneumatic yarn twisting device, untwisting tube, and false twisting device in turn. The twisting device, untwisting tube and false twisting device are disposed between front rollers and delivery rollers.