Abstract: Systems for fabricating nanofiber yarn at rates of at least 30 m/min (1.8 kilometers (km)/hour (hr)) using a “false twist” nanofiber yarn spinner and a false twist spinning technique are disclosed. In a false twist spinning technique, a twist is introduced to nanofibers in a strand by twisting the nanofibers at points between ends of the strand. This is in contrast to the “true twist” technique where one end of a strand is fixed and the opposing end of the strand is rotated to introduce the twist to intervening portions of yarn.

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: A rotatable element (10) is configured with a helical, endless thread guide passage (14) which is used to twist at least two threads (8, 9), particularly in a weaving machine's selvage forming device (7). The threads (8, 9) are guided in the passage (14) and displaced axially and mutually crossed by rotating the rotatable element.

Abstract: By appropriately controlling a yarn tension of an upstream side from a false twist device, variations in yarn quality among packages can be eliminated. A false twist texturing unit 7 which imparts a yarn Y with a false twist, a first feed roller 4 arranged in the upstream side from the false twist texturing unit 7, and an upstream side yarn tension control device 30 which automatically adjusts the rotation speed of a first feed roller 4 such that the upstream side yarn tension T1 is maintained within a fixed range are provided. A downstream side yarn tension control device 35 which automatically adjusts the false twist device 7 such that downstream side yarn tension T2 is maintained within a fixed range is also provided. Additionally, a determining unit 45 which determines whether or not the yarn quality is satisfactory based on the detection result of an upstream side yarn tension detecting unit 24 and a downstream side yarn tension detection unit 35 is also provided.

Abstract: A method and apparatus for producing randomly variegated multiple strand wrapped yarn in twisting together two or more yarns at a plurality of yarn twisting stations. At each station a pneumatic twisting head is disposed in which randomly turbulent air currents are created in a chamber in the twisting head by compressed air flowing into the chamber from a manifold through bores in the twisting head, thereby randomly twisting together two or more yarns in the chamber.

Abstract: A method for spinning yarn produce the yarn having properties generally comparable to those of ring spun yarn. A rotatable hollow shaft having an entrance at one end and an exit at the other is rotatable about an axis extending in a direction A. A number of free fibers are fed in the linear direction A in a fiber mass, certain of the fibers having free trailing ends. The fiber mass is passed into the interior of the hollow rotatable shaft through the entrance. An air flow is established with respect to the shaft to effect separation of the free trailing ends of the fibers, preferably by establishing an air flow path that is initially substantially unidirectionally in direction A and then is deflected to move at an angle with respect to the direction A away from the shaft. The shaft is rotated at high speed about its axis so that the trailing ends of the fibers wrap around other portions of the fiber mass to produce a yarn, and the yarn is withdrawn through the exit of the shaft.

Abstract: A yarn false twister in which an endless belt an a first rotary member are disposed across each other to constitute a nip point at which a yarn is twisted, and a second rotary member, on which the yarn is wound after the nipping thereof so that the upstream and downstream portions of the wound yarn cross in contact with each other, is provided coaxially with the first rotary member so that the second rotary member can be rotated independently of the first rotary member.

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

Abstract: A glass fiber bulk strand roving that is made up of a multiplicity of strands, each of which is made up of a plurality of individual fibers, for example, 200 of such fibers. Each strand of the roving has a multiplicity of rather long, axially extending loops, for example, axially extending loops with a calculated length of at least 6 inches, and a multiplicity of shorter, unbroken, cross-axially extending loops that are formed in the axially extending loops of such strands. The axially extending loops and the cross-axially extending loops interengage and intertwine with one another for form a composite entangled structure. The roving of the present invention is made by a process that uses a finger wheel to form axially extending loops in strands and a co-axial spinner with an inlet that is positioned above or below the finger wheel.

Abstract: A method and apparatus for the manufacture of a glass fiber bulk strand roving which is made up of a multiplicity of strands, each of which is made up of a plurality of individual fibers, for example, 200 of such fibers. Each strand of the roving has a multiplicity of rather long, axially extending loops, for example, axially extending loops with a calculated length of at least 6 inches, and a multiplicity of shorter, unbroken, cross-axially extending loops that are formed in the axially extending loops of such strands. The axially extending loops and the cross-axially extending loops interengage and intertwine with one another to form a composite entangled structure. The roving which is produced by the method and apparatus of the present invention is made by a process that uses an array of inwardly projecting fingers to form axially extending loops in the strands and a spinner with an inlet that is positioned adjacent the fingers.

Abstract: A glass fiber bulk strand roving that is made up of a multiplicity of strands, each of which is made up of a plurality of individual fibers, for example, 200 of such fibers. Each strand of the roving has a multiplicity of rather long, axially extending loops, for example, axially extending loops with a calculated length of at least 6 inches, and a multiplicity of shorter, unbroken, cross-axially extending loops that are formed in the axially extending loops of such strands. The axially extending loops and the cross-axially extending loops interengage and intertwine with one another to form a composite entangled structure. The roving of the present invention is made by a process that uses a finger wheel to form axially extending loops in strands and a spinner downstream of the finger wheel.

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: 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: 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: 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: A spinning flyer comprises a rotatable flyer having spaced apart substantially parallel flyer arms with a central web portion. A head projects outwardly from the web portion in an opposite direction from the arms and a twist crown is slidably engageable over the head. The twist crown is nevertheless inhibited from removal from the head by a securing member in the form of an O-ring or similar elastic member engageable between the twist crown and the head.

Abstract: A bundle of textile fibres 1, e.g. a sliver or roving supplied by a drafting apparatus 2, is passed over a frictional surface 7 provided by a rotary disc 6 so that the surface 7 moves transversely to the path of movement of the bundle 1. The resultant twist is prevented from running back into the drafting apparatus 2 by exit rollers 5, and from running forward to take-up bobbin 16 by draw-off rollers 13, 14. The resultant product is a fancy thread containing a false twist but on which the sum total of the residual twist is substantially zero. Thread 17 is used for threading-up the apparatus, but such a thread may also be fed to the disc 6 to form a composite with the bundle 1. Modifications provide for two or more bundles to be supplied simultaneously to the same disc 6 with one or all contacting the roughened surface 7 and for one or more bundles to be treated in successive discs 6 and combined at one of the successive discs 6.

Abstract: A friction rotor for false-twisting threads is provided with a coating of particles which are harder than the material from which the rotor has been made to provide a surface of harder particles which contact the thread as it passes over the rotor for false-twisting.

Abstract: A twisting element placed at the outlet of a high-speed rotor of a freed-fiber spinning device is constituted by a portion of turn of helical wire which is jammed against the internal surface of an elbowed tube. The portion of helical turn is located within the elbowed section of the tube and the tube is fixed on the thread delivery orifice of the spinning device.

Abstract: In order to produce core yarn wrapped with at least two separate wrapper yarns of the same or opposite hands, core material is passed in succession through a pair of rotary hollow spindles, each carrying a package of wrapper yarn whereby the core material is wrapped and which are relatively displaced so that the path of the material between a point just before the entrance of the first spindle and a point just after the exit of the second spindle deviates from a straight line so as to cause the core material or the resultant yarn to engage a rotary end of at least one of the spindles so as to apply false twist. The spindles may be supported so that their axes are displaced or displaceable in relation to one another for which purpose each spindle may be carried by a mounting capable of angular displacement about a support shaft and capable of being secured in any one of a range of angular positions.

Abstract: The invention relates to a process for the manufacture of a core/skin or core/sheath yarn, whose skin- or sheath-forming filament is wrapped around the core yarn in alternating "S" and "Z" directions. It relates furthermore to a device to carry out the process using otherwise known single spindle friction falsetwisting units.