Abstract: A compacted yarn is produced by providing a row of orifices subsequent to drafting along which the fiber strand is guided and after which the fiber strand is subjected to a twist according to the invention the suction air flow is monitored at least at one suction location and upon falling below a threshold, a signal is generated which can be used for shutdown or to alert personnel. The result is elimination of the reduction in yarn quality which can occur when the compaction system becomes blocked by lint, fiber accumulation or the like.

Abstract: A spinning machine in which downstream of the drafting frame and as part thereof, beyond the output rollers thereof, a suction roller is provided above the roving and cooperates with at least one counterroller below the roving to condense the roving before it is wound up on a ring-spinning or pot-spinning station.

Abstract: To produce a mock yarn which is similar in appearance to a true yarn with respect to the ability to discern the components of the mock yarn after the twist has been imparted to the mock yarn, the rovings or slubbings forming the mock yarn, after drafting separately but parallel to one another in a drafting frame, are subjected separately to condensing and compaction by suction rollers or belts provided with rows of perforations. Thus compacted and condensed rovings are then combined, twisted and wound up as mock yarns. A core thread can be introduced into each roving or into at least one of the rovings upstream of the last pair of drafting rolls or immediately upstream of the condensing unit for a core mock yarn.

Abstract: A drafting equipment is provided with a small double belt for spinning machines with a fiber bundling zone which follows the pair of output rollers of the main drafting field and is followed by a pair of delivery rollers. A pneumatic compression device is provided between the pair of output rollers and the pair of delivery rollers. A pneumatic compression device is provided with a small perforated belt and a suction device extending on the side of the belt away from the fiber sliver and which sucks air through the fiber sliver between the pair of output rollers and the pair of delivery rollers.

Abstract: A condensing zone lies downstream of the front roller pair of a drafting unit 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, perforated transport belt. The transport belt transports the fiber strand to a nipping roller, which presses the fiber strand and the transport belt against the sliding surface. The nipping roller is connected to a drive, from which drive said nipping roller can be cut off in age the case of a break in the transport belt.

Abstract: A method is provided for producing a yarn from at least two individual yarn components having different physical characteristics so that the produced yarn has a desired visual effect. The method includes continuously supplying at least one yarn component in the form of a bundle of continuous filaments and individually treating the bundle of continuous filaments in a treating stage. The treated bundle of continuous filaments is then conveyed to a collective compacting stage. At least one other yarn component is supplied from a spinning beam or a bobbin directly to the collecting compacting stage and the bundle of continuous filaments and at least one other yarn component are compacted collectively in a collective compacting device.

Abstract: To provide a twisting apparatus in which one of a pair of twisting rollers t1 and t2 is a hollow rubber roller t1, while the other is a hard cylindrical roller t2 in which a rubber band t16 is installed. Twisting efficiency is improved compared to the conventional twisting roller both comprising hollow rubber rollers. Thus, by applying the present invention to a spinning apparatus for manufacturing spun yarn from a fiber set, the spinning speed of the spun yarn can be increased and the spinning range extended.

Abstract: A machine for making a mixed yarn by combining two false-twist textured yarns is disclosed. The machine comprises drawing systems (3A, 3B; 8A, 8B) arranged on either side of the texturing area and mounted alternately on two separately controlled parallel, shafts, and heat treatment units (5A, 5B) located in the false twisting area and having a temperature controlled by two mutually separated systems. The false-twist spindles (7) are power spindles with a speed that may be varied to suit each kind of yarn. The machine comprises joining device (9) for interlacing two yarns from two different texturing positions, the device being arranged, when seen from the front, between the positions so that the two yarns (2A, 2B) follow identical paths before being joined.

Abstract: To prevent yarn from being cut when an operating spinning machine stops, thereby preventing subsequent re-activation from being affected. In a spinning machine for manufacturing yarn by passing a fiber bundle that exits a draft apparatus 1 through a spinning nozzle 2 injecting a swirling air current and then through a twisting apparatus 3 that twists the fiber bundle in a direction reverse to that of the swirling air current, each spinning unit is driven independently, and the draft apparatus 1 can be decelerated or accelerated with the speed ratio of each pair of rollers being maintained. When the spinning is stopped or activated, the draft apparatus 1 and the twisting apparatus 3 simultaneously decelerate or accelerate so as to be simultaneously stopped or activated, and in response to this operation, air injection from the spinning nozzle 2 stops or starts.

Abstract: A spinning machine having a drafting frame, a condensing unit at the downstream side of the drafting frame and a spinning station for winding up the yarn and imparting twist to the roving in forming the yarn. The condensing unit comprises a disk-shaped suction rotor oriented in a plane tangent to the output rollers of the drafting frame. A limited compaction zone is formed by a shield within a suction rotor and designed to apply suction only to a limited portion of the perforated periphery thereof. The pressing roller bears against the suction rotor at the downstream side of the compaction zone.

Abstract: A method for continuously producing a twisted yarn with minimal curling tendency includes the steps of spinning a yarn and directly thereafter, within a time period of less than one second, twisting the yarn. The yarn tension at the end of the spinning step can be adjusted to be essentially the same as the yarn tension at the end of the twisting step, or, in the alternative, the yarn tension at the end of the twisting step is greater than 70% of the yarn tension at the end of the spinning step.

Abstract: A drafting and spinning apparatus is disclosed that produces highly uniform yarns with improved mechanical properties. The apparatus comprises a plurality of pairs of drafting rolls for drawing a sliver formed of one or more types of staple fibers, each fiber type having a predetermined effective fiber length. The plurality of pairs of drafting rolls comprises at least two pairs of intermediate rolls, with the distances between the nips of adjacent intermediate roll pairs being no more than the effective fiber length of the longest fiber type in the sliver. The apparatus further includes device for spinning the sliver into yarn at a take-up speed of greater than 150 meters/minute.

Abstract: A spinning apparatus is disclosed according to the invention having a drafting zone comprising at least four roll pairs for drawing a sliver comprising one or more types of staple fibers. The rolls pairs include a back roll pair, intermediate roll pairs and a front roll pair and the distance between the nip of the back roll pair and the nip of the adjacent intermediate roll pair, and the distances between the nips of adjacent intermediate roll pairs is no more than the effective fiber length of the longest staple fiber type in the sliver. The drafted sliver may be spun into yarns at high speeds, such as the speeds used in air jet spinning apparatus to provide yarns having increased strength and reduced defects. The present invention also includes a method of forming high quality and high uniformity yarns by advancing a sliver through a drafting apparatus and thereafter spinning the sliver into yarn.

Abstract: A method and apparatus are described for piercing severed yarn to a sliver in a spinning machine in a manner to prevent formation of an excessively long or frail piecing portion by passing leading yarn Y' through a twist device T; driving draft rollers 1, 2, which have been stopped following severance of the yarn to remove the thinned, tapered tip of sliver 6 from the front roller 4; and then introducing sliver for piecing into the twist device while removing a portion of the fibers constituting such a sliver to make the piecing portion thereof more nearly as thick as the leading yarn.

Abstract: A spinning apparatus having a nozzle n1 that applies a rotating air current to fibers f and a hollow spindle s1, wherein a fiber introduction member E with a fiber guide surface e8 having a torsion angle of 100.degree. or more is disposed, without a needle shaped guide member e2, near the tip s1" of the fiber introduction side of the hollow spindle. Since the torsion angle of a fiber guide surface of the fiber introduction member is 100.degree. or more, fibers can be bundled easily without the needle shaped guide member and leaves and other foreign matter contained in a sliver are prevented from accumulating between the fiber introduction member and the hollow spindle, thereby reducing the frequency of yarn breakage and improving the spinning capability.

Abstract: Piecing method of a spinning machine whereby, after holding outside a twist device both a leading yarn ejected from the sliver guide entrance of a twist device in a stationary state and a sliver delivered by a re-operated draft device, the twist device is operated, the sliver supplied to the twist device and the fibers comprising the sliver are entangled in the leading yarn pulled from the twist device. The success rate of yarn piecing may be improved without detailed adjustment of the pulling timing of the leading yarn guided into the twist device and the supply timing of the sliver supplied to the twist device.

Abstract: Core/wrap yarn is produced by continuously forming air jet-spun yarn and uninterruptedly continuously passing it to a friction spinner for purposes of wrapping the air jet-spun yarn with fibrous material in the friction spinner, so as to form core/wrap yarn.

Abstract: On a piecing method of a spinning machine which, after cutting a sliver between normally rotating draft rollers and stationary draft rollers, inserts a leading yarn into the spindle of a twist device and carries out piecing by the restarting of the draft rollers, restarting of the twist device and running of the leading yarn, approximately all the fibers comprising the tapered tip of the cut sliver form the joint part by being entangled in the leading yarn. As almost all of the fibers comprising the tapered tip of the cut sliver contribute to the joint part, the success rate of piecing is increased and a stronger joint part may be formed.

Abstract: A machine unit through which a thread is guided includes a drafting unit comprised of double godets, a texturing unit, a relax unit comprising double rollers, and a winding device. The drafting unit and the relax unit are arranged at an angle of less than 90.degree. to a reference plane, while the winding device is arranged at an angle (.delta.) of essentially 90.degree. to the reference plane. Furthermore, an operator's working position is provided, from which the aforementioned arrangement of the drafting unit and relax unit relative to the winding device is accessible.

Abstract: This invention is related to a yarn piecing apparatus of a spinning machine arranged with a holding member (12) that holds the parent yarn (Y') which is inserted in the hollow spindle (6) of the spindle member (5) which is seperated from the nozzle member (2), at a predetermined tension so that it does not rotate due to the rotating air current from the nozzle member. As the parent yarn (Y') inserted in the hollow spindle (6) of the spindle member (5) which is seperated from the nozzle member (2) is held by the holding member, there is no rotation of the parent yarn (Y') by the rotating air current and consequently, fibers can be reliably attached to the parent yarn (Y') and the success rate of yarn piecing can be increased.

Abstract: A system for forming elastomeric core/staple fiber wrap yarn using a spinning machine such as an air jet, roller jet or roller spinning machine. The system includes a package drive assembly, yarn motion and presence sensors, an improved drafting assembly and a yarn clearer delay cylinder to provide continuous formation of superior quality elastomeric core/wrap yarn.

Abstract: This invention is concerned with a spinning apparatus with an arrangement of a spinning nozzle which generates a rotating air current positioned close to the front roller and a pair of false twist units having hollow cylindrical rollers formed from elastic material which are positioned down stream from that spinning nozzle. As contact surfaces are formed that nip the fiber bundle by contacting the hollow cylindrical rollers having elastic properties, the fiber bundle can be reliably nipped in conjunction with the elasticity and the centrifugal force of the hollow cylindrical rollers. Even when driving the false twist apparatus at high speed a sufficient false twist can be imparted, a strong delivery power and unwinding power can be applied to the fiber bundle, and not only can high speed spinning be achieved, but also a strong, uniform spun yarn with little hairiness can be manufactured.

Abstract: An apparatus and method for guiding a broken thread end in a yarn spinning machine into a position in readiness for piecing wherein the broken thread end is retrieved from a bobbin, routed through a yarn spinning mechanism, guided into the nip of a pair of rollers of an operating drafting apparatus without abrasion of or interference with the yarn end during the guiding of the yarn end and wherein the yarn end is deposited in a position in the drafting apparatus such that the yarn end is controllably withdrawn from the drafting apparatus through the spinning mechanism and pieced or joined with a new sliver as the yarn end is withdrawn.

Abstract: A spinning apparatus having a spinning section for forming yarn by applying a rotating air current of predetermined air pressure to a supplied fiber bundle and twisting the yarn while opening an end of the fiber bundle, and having a piecing section for reverse threading a spun yarn end into that spinning section. The spinning apparatus has a high pressure application member for applying high pressure air at a pressure higher than the aforementioned predetermined air pressure to such fiber bundle during the predetermined time after the spun yarn end is reverse threaded into the spinning section. The high pressure application member includes a first air circuit for supplying the aforementioned predetermined air pressure, a second air circuit that supplies air at a pressure higher than the aforementioned predetermined air pressure and a change-over member between the first and second air circuits.

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: The ring spinning method drafts a silver in a multi-stage drafting system where the silver acquires a total draft in a range of from 60 to 150-fold. Following outlet from the last nip of the drafting system, the drafted silver is conveyed without drafting over a guide path in which the fiber band is condensed to form a compact fiber strand of not more than 2.5 millimeters width and preferably less than 15 millimeter in width. At the end of the guide path, the fiber strand passes through a twist inhibiting nip between two rollers and is then passed by twist distribution to a ring spinning device. The yarn produced possesses a high quality with respect to hairiness and neps.

Abstract: A spinning apparatus having a nozzle (n1) that exerts the actions of a rotating air current on the fiber (f), a hollow spindle (s1) and a fiber introduction member (e2) positioned opposite the inlet end part (s1") of the hollow spindle with a fiber guide member (E) arranged with a fiber guiding surface (e9) twisted in the rotation direction of the air flow and the fiber introduction member (e2) projecting from the fiber guide member toward the hollow spindle. The end part of the guide member (E) may be formed into a flat or a curved shape whereby a spun yarn with improved fiber evenness and having higher strength, a round cross section, a better exterior and resembling blend yarn which differs from core yarn, can be spun. Furthermore, improvements in the spinning properties and success rate of yarn piecing can be realized.

Abstract: A method and apparatus for automatically removing a slub from spun filament yarn and a sliver or roving of staple fibers. The sliver or roving of staple fibers are fed through a drafting apparatus to prepare a continuous bundle of staple fibers. The filament yarn is pretensioned such that a texture is temporarily substantially removed. The continuous bundle of staple fibers and the filament yarn are combined downstream of the drafting apparatus. The combined continuous bundle and the filament yarn are fed into a spinner. The spun filament yarn and staple fibers are monitored to detect imperfections of a predetermined magnitude. A first signal is generated upon detection of an imperfection of the predetermined magnitude. The feeding of the staple fibers is stopped in response to the first signal. The core yarn is clamped at a predetermined position in response to the first signal.

Abstract: A method and apparatus for producing randomly variegated multiple strand 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. The yarns which have been twisted together are taken up over a plurality of traversing drums commonly mounted on a shaft which is driven by an alternating electric current motor controlled by a control device which operates to start and restart the motor on a predetermined cycle including a variation of the electrical input sufficient to result in randomly unpredictable inertia resistance of the traversing drums to rotational speed variation, thereby creating randomly unpredictable take-up of the yarns to produce non-uniform random twist in the yarns.

Abstract: A method for manufacturing a composite yarn of staple fibers and continuous multifilament yarn. The multifilament yarn is made from non-set, textured, no oil, polyester and first pretensioned before entering a spinning chamber where it is co-spun with the staple fibers which is made from pima cotton. The tension is relaxed after passing through the spinning chamber to allow the filaments of the yarn to expand and form a matrix to which the staple fibers can adhere. The expanded filaments cause the staple fibers to be tightly wound around the core. A composite yarn is also disclosed.

Abstract: A fluff suppression apparatus comprising a pair of rollers disposed with axes of rotation thereof crossed with each other and in contact with each other for nipping a spun yarn thread, and at least one of the pair of rollers has, at a contacting portion thereof with the spun yarn thread, has resiliency and flexibility and has a cavity formed in the inside thereof.

Abstract: A spinning apparatus for producing a spun yarn by using swirling air currents to twist a non-twisted short staple fiber bundle drafted by a drafting unit. A nozzle block having at least one nozzle provides a swirling air current that acts upon the fiber bundle. A fiber bundle passage is defined by the nozzle block and a needle holder having a substantially central, longitudinal axis and a guide surface that twists relative to the longitudinal axis. A guide member associated with the needle holder projects toward the inlet of a hollow spindle.

Abstract: A method and apparatus for piecing a sliver and at least one of a leading yarn and a bobbin yarn. A nozzle member and a spindle member having a hollow spindle are provided. A relative spacing is established between the nozzle member and the spindle member. At least one of a leading yarn and a bobbin yarn is inserted into the hollow spindle of the spindle member relatively spaced from the nozzle member. The relative spacing between the spindle member and the nozzle member is decreased, so that the spindle member and the nozzle member mutually form an air chamber. A compressed air flow is directed into the air chamber. Sliver is supplied to at least one of the leading yarn and the bobbin yarn, and the sliver and at least one of the leading yarn and the bobbin yarn are pieced together.

Abstract: A spinning device for producing a spun yarn from a staple fiber bundle. A staple fiber bundle is supplied to a spinning nozzle via the front rollers of a draft unit. A pair of delivery rollers is positioned downstream from the spinning nozzle and spaced from the front rollers by a distance that is shorter than the length of the longest fibers in the staple fiber bundle.

Abstract: A method, in a spinning machine comprising a spindle portion and a nozzle portion having a first nozzle for exerting a turning air current on a fiber bundle moved out of a drafting device, comprises introducing a yarn end on the package side from the spindle portion into a second nozzle to place it in an open state, turning the yarn end around the spindle by jetting a low pressure air from the first nozzle, and supplying the drafted fiber from the nozzle portion to effect a piecing. A piecing apparatus in the spinning machine comprises device for sucking a spinning yarn wound into a package, device for reversing the package, device for guiding and cutting the sucked spinning yarn, device for transferring a spinning yarn to an outlet side of a spinning yarn of a spindle member separated from a nozzle member of a spinning section, and movable device for threading and opening on a sliver inlet side of the spindle member of the spinning yarn.

Abstract: There is provided a spindle device for use in a spinning machine which produces little noise, which can eliminate the need for a rotational drive mechanism for a tubular spindle, for which bearing life is prolonged, and which can prevent waste threads from invading inside the bearings. A tubular spindle accommodated in a housing is rotatably supported by static-pressure pneumatic bearings. A cap, having nozzles and forming a spinning stream of air therein with compressed air blown off through the nozzles, is disposed at the tip portion of the tubular spindle. The tubular spindle radially supported by a film of air blown out through the static-pressure pneumatic bearings is rotated by the spinning stream of compressed air formed in the cap.

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 draft device is provided with a rotatable porous roller and a suction tube for establishing a negative pressure within the porous roller. A pneumatic spinning apparatus is provided with a spindle and a nozzle for exerting a whirling air current on a fiber bundle from the draft device. A waste transport pipe is provided for circulating waste discharged from the spinning apparatus back to the porous roller. Waste discharged from the spinning apparatus is thereby recycled to join with the fiber bundle from the draft device.

Abstract: An apparatus for stretching natural staple fibers to reduce their diameter includes a plurality of rotatable arrays of driven pulleys which are mounted for rotation between two twist blocking nips. The rotatable arrays are rotatable on a longitudinal axis corresponding to the direction of travel of an assembly of fibers through the apparatus to impart false twist into the assembly. The assembly of fibers is stretched between two of the pulley arrays with the pulleys of the downstream array being driven at a higher speed than the pulleys of the upstream array. A steam chamber is provided for setting the stretch while the false twist is being maintained by further rotatable pulley arrays. Post treatment stages may be added to further stabilize the stretched fibers.

Abstract: In the case of a spinning machine having spinning stations arranged on one side of the machine and having depositing sites for cans containing the fiber material to be spun provided on the other side of the machine, devices are provided for the withdrawal and feeding of the slivers which have drivable guiding belts which extend from an area above the depositing sites to the area of the spinning stations.

Abstract: In the case of a spinning machine having several spinning stations, which comprise drafting units, for the spinning of slivers fed in cans, false-twisting elements are connected in front of the drafting units which provide the slivers with a protective twist.

Abstract: Spun yarns are made at high speeds of up to 220 meters per minute, using spinning techniques in which air is used to twist the fibers of a three component blend, one component of which consists of staple fibers made from electrically conductive filaments having a denier no greater than 2.5 times the denier of the filaments of the other components.

Abstract: A pneumatic spinning apparatus comprises a nozzle block having a nozzle which gives a whirling air stream to a fiber bundle coming out of the draft device, a spindle having a fiber bundle passage, a guide member with its forward end protruding into a spindle inlet port, and an introduction tube having a fiber bundle passage which has been separated into a plurality of parts and fixed at the nozzle block inlet side.

Abstract: In the case of an arrangement for pneumatic false-twist spinning, it is provided that a sliver is divided in the area of the delivery roller pair of a drafting unit, is divided into two partial slivers. Edge fibers are spread away during and after the division. The divided slivers are then jointly or separately pneumatically false-twisted and are wound up as an individual yarn, as two separate yarns or as a double yarn.

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 process and arrangement for false-twist spinning, it is provided that, by use of an air current in the delivery area of a drafting unit, an increased number of fiber ends are spread away which subsequently, in a controlled manner, are wound around the sliver by means of a guiding element moving in the travelling direction of the sliver and holding the spread-away fiber ends.

Abstract: A novel false twist spinning process in which a sliver (60) is twisted by a mechanical force-twisting device (58) between the front rollers (54) of the drafting unit (51) and the draw off rollers (59). The spinning tension is so adjusted that the false-twisted sliver (60) is prevented from assuming a helical shape and a balloon shape at least in the zone between the nip line (10) of the drafting unit (51) and a yarn guiding element (55) disposed before the false twisting device. In an apparatus for the practice of the process, the mechanical false twisting device (58) comprises discs (58A) or aprons (58B) and the yarn guiding element (55) comprises of a false twisting nozzle (55A, 55B).

Abstract: An arrangement for pneumatic false-twist spinning having a drafting unit, a false-twisting device which follows, having a connected withdrawal device and having a rotation body arranged between the false-twisting device and the drafting unit. It is provided that the rotation body is arranged directly behind the pair of delivery rollers of the drafting unit in such a manner that its suction device is effective into the area of the nip line of the pair of delivery rollers of the drafting unit. A suction slot of the rotation body has a section which extends essentially in the direction of the nip line and is situated in the area of a deflection of the sliver leaving the pair of delivery rollers.

Abstract: A pneumatic spinning apparatus for producing yarns having characteristics equal to those of ring spinning yarns. In the spinning apparatus, a guide member is mounted with an extreme end thereof faced to an inlet of a spindle within a nozzle block which exerts a turning air stream on a bundle of fibers moved out of a draft device, and a distance from the spindle inlet to a nip point of front rollers of the draft device is defined in a specified range.

Abstract: A false-twisting, intertwining and wrapping process can combine continuous metal wire into the core of a composite structure comprising also continuous textile fiber core elements in the core, interlocking discontinuous textile fibers within the core and with such discontinuous fibers as surface wrappings.