US3813868A - Friction false-twisting device - Google Patents

Friction false-twisting device Download PDF

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Publication number
US3813868A
US3813868A US00311886A US31188672A US3813868A US 3813868 A US3813868 A US 3813868A US 00311886 A US00311886 A US 00311886A US 31188672 A US31188672 A US 31188672A US 3813868 A US3813868 A US 3813868A
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thread
bodies
shafts
rotation
false
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English (en)
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H Lorenz
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Oerlikon Barmag AG
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Barmag Barmer Maschinenfabrik AG
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/08—Rollers or other friction causing elements
    • D02G1/082—Rollers or other friction causing elements with the periphery of at least one disc

Definitions

  • This invention relates to a friction false-twisting de vice having a number of endless friction surfaces of ball-shapedcross-section rotating in parallel planes and over which a thread is guided, inclined to its direction of movement.
  • a false-twist is imparted to the thread in such a manner that one component of the motion of the friction surface proceeds in the direction of the desired thread-roll motion and the thread embraces each friction surface with a predetermined entry and exit angle.
  • F urther,'the invention involves the proper selection of friction surface rotational direction and the proper positioning of the friction surfaces to produce falsetwisted yarn having torque in either the S or Z direction.
  • the device with which a false-twist is imparted to the moving threads is especially adapted for crimping or curling synthetic thermoplastic yarns or threads.
  • Devices for curling such thread conventionally consist of a hollow spindlewith a pin extending perpendicular to its axis.
  • the thread is looped around this pin and is guided by the spindle.
  • the spindle is rotated bytangentionally contacting drive belts or rollers-Thereby, the thread is twisted by the spindle against the direction of movement of the thread and it leaves the spindle in i. an untwisted condition (for example see West German Published Specification No. 1,302,699).
  • the demands for increasing thread velocities and decreasing production time have made a constant increase of the rotative speed of the spindle necessary.
  • friction type false-twist devices consist of one or more moving friction surfaces over which a thread is guided in a direction perpendicular or inclined in relation to its direction of movement.
  • the direction of motion or at least a component of motion of the friction surface extends in the direction of the desired thread-roll motion.
  • a fa1se-twist device which operates according to the first principle consists of two disks rotating in the same direction, the axes of which are parallel, their circumferential surfaces are closely spaced so that the thread, moving parallel to the axes, is frictionally engaged between them.
  • the contact point between thread and friction surfaces lies on astraight line connecting the centerlines of the disks (West German Published Specification No. 1,278,903).
  • This type of device has the disadvantage that the thread travel becomes unstable and the point of clamping contact of the thread with the disks continually changes.
  • the friction producer consists of three shafts, rotatably, arranged on a support plate with their axes extending parallel to each other and passing preferably through the corners of'a triangle having equal sidesyOf the three shafts, at least one is driven and at least three endless belts are looped around the shafts, whereby the three belt runs cross each other between the three shafts to provide the boundary of a thread passage having a triangularly shaped cross section, the inscribed circle of which is matched to the cross section or diameter of the thread to be false-twisted.
  • a false-twist device which employs the second'principal of embracing the friction surfaces consists of a rotating sleeve which, in the direction of the axis, has a bowed inner circumference.
  • the thread is guided through the sleeve in an axial direction'whereby the angle of entry and exit of the thread is between 45 and 90 (West German Published Specification No. 1,205,652 and corresponding US. Pat. No. 2,936,567).
  • the disadvantage in this case, is that the embracing angle of the thread is theoretically at most I80", but, in reality issmaller.
  • the high degree of tension necessary to carry the thread along with the V smallest possible slip exerts itself in an increased thread tension in the direction of thread movement.
  • Accordfriction surface are inversely proportional to the very the outer or the inner circumferences of rotating sleeves or rings. For the creation of friction between.
  • the friction surfaces and the thread two different principles are used.
  • the friction between friction surfaces and threads is maintained by an ingly, the threadtension against the direction of the thread movement becomes smaller and, as a result, the contact pressure of the thread against the friction sleeve also subsides.
  • the friction velocities adjacent the entrance and exit of the sleeve are larger than in the central area and further the position of the thread is changed in a circumferential direction as it is carried along by the friction surface to produce an ir-,
  • each of the three axles are provided with a multitude of disks which are equally spaced in an axial direction and extend between each other in a tight sequence. These disks overlap themselves so that they form an eye or a tight passage which has a width not to exceed the thread diameter as it passes therethrough.
  • the disks are formed cylindrically so that embracement of the thread does not occur along the straight surface of the disks.
  • This type of device does not produce a sufficient and uniform twisting torque to the thread. Also, this twist producer can effect a twisting essentially in only one direction (S or Z rotation). It has'been shown that with a reversed direction of rotation of the disks, the same twisting of the thread can no longer be obtained.
  • one ofthe axles is provided with only one disk.
  • the two other axles are provided each with two disks above and below the first disk.
  • Each of these disk pairs overlaps itself in such a manner, that a space is formed through which the thread is guided.
  • the single disk or roller serves the purpose to press the thread into the space formed between the disk pairs and is provided with a ball-shaped circumferential surface in the direction of the axis, whereas the other disks are shaped cylindrically, Also, this device can only be used for one twisting direction.
  • the thread is deflected only in one plane and embraces essentially'the middle, ball-shaped roller whereas it essentially merely touches the disk pairs arranged ahead and behind. For this reason, the contact pressure of the thread against the disk is too small to produce a uniform and sufficient twisting movement to the thread.
  • the present friction false-twist device include one or more groups each having three or more friction surfaces with the The positions of the friction surfaces are interchangeable and spaced at equal distances in the direction of movement of the thread such that the subsequent contact points provided for the false-twisting of the thread lie on a screw-thread line preselected according to its direction of rotation and that its projection onto a single plane form the comer points of a preferably and essentially equal-sided triangle, rectangle, or polygon.
  • the position of at least one friction surface is adjustable in one plane parallel to the remaining friction surfaces. Therefore, the thread passes through a device in a screw line selectable with regards to direction of rotation and pitch angle.
  • the contact points of the thread with the friction surfaces lie at the corners of the substantially equilateral triangle, rectangle, or polygon which the friction surfaces fomi in the projection to the single plane.
  • an S or Z false-twist can be produced.
  • the friction false-twist can be used with various types of thread material having a wide range of thread characteristics, as well as with a wide range of parameters of the curling process. ln this connection, it has been found that one or a number of friction surfaces can be driven with different velocities. v
  • the friction surfaces can be formed of endless moving belts. Friction surfaces have also proved satisfactory which are formed by rotation surfaces of bodies of rotation rotating in the same direction, 'whereby groups of three or four bodies of rotation are arranged on three or four parallel axles, one behind the other in the direction of the thread movement and in screw-like succession.
  • the distance between at least two axles are adjustable and the positions of the bodies of rotation on at least two of the axles are exchangeable in their sequence in such a manner that the successive points of contact of the thread lie on a preselected screw-thread line in relation to the rotating surfaces and with regard to pitch angle and direction of rotation.
  • devices may be provided which permit changing the axial distance between the individual bodies of rotation by a predetermined amount.
  • the bodies of rotation may consist of round disks provided with ball-shaped outer circumferential surfaces or O-rings having ball-shaped inner surfaces.
  • rotating surfaces may be constructed with different rafriction surfaces being arranged one behind the other.
  • An arrangement which may be utilized in certain instances includes at least one group of bodies of rotation arranged on axles which can be driven independently of the axles of an additional group and having drive for this additional group of bodies of rotation can beaccomplished by means of a preselected speed ratio from one axle of the so-called main false-twist producer.
  • a false-twist yarn curling machine is equipped with a multitude of such false-twist stations, two independent drives may also be provided in the machine, one of which drives the so-called main falsetwist producers and the other of which drives the additional group of bodies of rotation.
  • the surfaces of the friction bodies may consistof materials having a high friction value or also of materials having good wear resistance so as steel, coated metals etc.
  • the inventive device allows extensive control of the friction condition in the false-twist producer, it is possible that the friction surfaces of one and the same false-twist producer consists of different materials with regards to friction value and wear resistance.
  • the friction surfaces are arranged such, in the direction of movement of the thread, one behind the other and are rotated in such a direction, that the vectors of movement of the friction surfaces engage the thread in series and rotate in the direction of a lefthand screw.
  • the friction surfaces are arranged such and moved in series in the direction of movement of the thread, that the vectors of movement of the inseries arranged friction surfaces rotate in the direction of a right-hand screw. It is suggested that the friction surfaces are driven in such a manner with diferent velocity and/or parallel staggered in such a way that their component of movement in' the false-twist direction on the friction surface closest to the thread entry, is theoretically established and in the further friction surfaces is larger than the presupposed velocity of rotation of the thread by. the required number of rotations per meter.
  • This process has the advantage that a selfregulating or twist leveling effect occurs at those friction surfaces, in the sense that the entry friction surface provides an additional false-twist producing or falsetwist reducing torque on the thread, depending upon whether the rotation actually imparted to the thread falls below or above the'theo'retical value.
  • FIG. 1 is an isometric view of an embodiment of the present friction false-twist'device employing rotating
  • FIG. 2 is an elevational view, with parts in section, of an embodiment of the present friction false-twist device employing rotating disks;
  • FIG. 3 is a schematic plan view of the friction falsetwist device of FIG. 2, including three axles;
  • FIG. 4 is a view similar to FIG. 3 but showing a friction false-twist device including four axles;
  • FIG. 5 is a fragmentary elevation of the lower lefthand side of FIG. 2 with parts in cross-section;
  • FIG. 6 is a plan view of the false-twist device illustrated in FIG. 2;
  • FIG. 7 is an elevational view of an additional or auxiliary false-twist device which is driven from the main friction false-twist device according to FIG. 2;
  • FIG. 8 is a vertical sectional view through another embodiment of an additional or auxiliary false-twist de- Vice which isdriven from the main friction false-twist device according to FIG. 2;
  • FIG. 9 is an elevational view with parts in section of another embodiment of the friction false-twist device employing rotating rings or sleeves;
  • FIG. 10 is a plan view of the false-twist device according to FIG. 9.
  • the friction false-twist device shown in FIG. 1 consists of vertically disposed rotating shafts 4, 5 and 6. Each two of these shafts are embraced by a first group of endless belts I, 2 and 3 and a second group of endless belts 11, 12 and 13. Each shaft is provided with two groups of three rotating grooves 14, 15, 16 and l7, 18, 19. The shape of these grooves is matched to the circular or oval cross-section of the belts.
  • Shaft 5 is driven by whorl 9 andfriction belt 10. Direction of rotation can be changed through reversal of the drive belt 10.
  • the friction false-twist device is connected to the machine frame by means-of a support plate 7.
  • a guide 20 is positioned at the entrance to the device to direct the thread 8 at an angle to the first belt 1.
  • a thread guide opening 20' is provided at the exit end of the false-twist device to direct the thread 8 at an angle from the last belt 13.
  • contact points of the thread with the belts form, in plan view, the comers of a triangle around which the thread travels in a right-hand screw direction, as schematically illustrated in Figure 3.
  • the friction surfaces are formed by circular or crowned circumferential surfaces of rotating disks.
  • This false-twist producer consists of three shafts 24, and 26 which rotate in the frame 7.
  • the shafts 24, 25 and 26 are supported in sleeves 30 by means of ball bearings.
  • Shaft 26 is driven through whorl 9 and drive belt It).
  • the frame of the false-twist producer consists of two parts, 7 and 57. Part 7'is solidly supported on the machine frame by screws 74. Bolts 62 and 63 are axially movable in bores of this stationary frame 7 (FIG. 5). At reduced ends 66 and 67 of these bolts, the frame 57 is fastened by means of nuts 68 and 69.
  • the bolts 62 and 63 are provided at their outer ends with collars 70 and 71 and springs 64, 65 through which theysupport themselves on the frame 7.
  • Bolt 62 further carries at its other end a rotatable
  • the rotating disks or thread engaging friction pulleys are provided in' groups with each group including as many pulleys as the false-twist producer has rotating shafts. Accordingly, the first group consists of pulleys 21, 22'and 23' and the second group consists of pulleys 31, 32 and 33. The pulleys of each group follow each other in the direction of the thread and are equally spaced.
  • the pulleys on each shaft are spaced apart and held cam wheel 59.
  • the cam wheel 59 is rotatably supported between'collar '70 and a ring 72 which is held in position by a screw 73.
  • the cam wheel 59 is provided with a handle 60 and a rotation indicating dial 75 surrounds the cam wheel 59.
  • the outer curved surface of the cam wheel 59 engages a stationary pin 61. Turning of the cam wheel 59 effects a moving to or away of the mov able frame 57 from the stationary frame 7.
  • the false-twist producer according to FIG. 4 may'also be equipped a with an adjusting mechanism of the kind described in against rotation'by sleeve elements 27 so that each pulley may be removed from the shaft.
  • sleeve elements 27 of different lengths are inserted on each shaft.
  • washers 29 and screws 28 are used in the upper end of each shaft.
  • Theshaft spacing and the pulley diameters are so arranged that, as; shown in FIG. 3, the first group'of pulleys 2i, 22, 23 and the second group of pulleys 31, 32, 33 each form the shaded overlapping triangle.
  • FIG. 3 The double lines in FIG. 3 which extend tangentially of the friction disks or pulleys schematically represent the friction belts of. the false-twist device illustrated in FIG. 1 and form a large equilateral triangle. As the thread passes downwardly and engages the surfaces of the belts or friction disks, it follows a right-hand screw-thread line forming an equilateral triangle in plan view, which is shaded in the opposite direction in FIG. 3.
  • FIG. 4 shows a top view of a modified form of friction false-twist device which consists of four rotating shafts 8H, 82, 63 and 84.
  • One or a number of groups of friction disks 85, 86, 87, 86 are mounted on the shafts .and each group consists of four disks corresponding to the number of shafts.
  • the construction of this form of false-twister is substantially the same as the FIGS. 5 and 6. For this, two of the shafts 83 and 84 are supported on the movable frame 57.
  • the movable frame 57 In operation of the friction false-twist producer according to FIGS. 2 to 6, the movable frame 57 is moved so far from the stationary frame 7, by turning the cam wheel 59, that the thread, extending parallel to the shafts, finds a passage whereby it can be inserted between the disks. Thereafter, the movable frame 57 is again moved close to the stationary frame until an overlap is formed as shown in FIGS. 3 and 4.
  • the size of the overlap is first experimentallydetermined with consideration of the given thread material, the thread denier and othercharacteristics of the thread, the speed of travel of the thread, the number of turns of twist applied to the thread, the most favorable thread tension for the curling ahead of and behind the false-twist producer, as well as consideration of other parameters.
  • the amount of overlap is fine-adjusted by rotating the cam wheel 59.
  • the setting for a particular set of circumstances can then be determined by noting the rotation indicating dial 75.
  • the disks are arranged one behind the other in such a manner, that the thread-in its travel through the false-twist producer according to FIG. 2, touches successively each one disk of the shafts 24, 25, 26 or 25, 26, 24 or 26, 24, 25.
  • the disks are rotated in the opposite direction and arranged in reverse order so that the thread, in passing through a false-twist producer according to FIG. 2, touches in sequence one each disk of shafts 24, 26, 25 or 26, 25, 24 or 25, 24, 26.
  • the thread touches successively each one disk of the shafts 81, 82, 83, M52, 83, 84, 81, etc.
  • the disks are rotated in the 9 opposite direction and arranged in reverse order so that the thread touches successively each one disk of the shafts 84,- 83, 82, 81 or 83, 82, 81, 84, etc.
  • Example 2 In an experimental arrangement according to Example 1, however, with a false-twist producer according to FIG. 2, a nylon thread 70/34 denier, on the basis of process parameters as-applied in Example I, was produced with uniform curling and, dye absorption. In this case, the rotative speed of the shafts with a-disk diameter of 45 millimeters was 2,600 revolutions per minute; The
  • it is constructed exactly as the friction false-twist device according to FIG. 2 and may be supported on frame 7 of the false-twist producer shown in FIG. 2 by means. of a connecting bracket 47, the lower portion of which is shown in dotted'lines in FIG. 2.
  • the supplementary device is provided with a shaft 48 (FIG. 7) supported in a bearing block 51 on the bracket 47.
  • the shaft 48 is driven through belt pulleys 39 and 49 and drive belt from the shaft 25 of the false-twist producer of FIG. 2.
  • the rotating'motion of shaft 48 is transmitted to shafts 44,45 and 46 of the supplementary deviceby means of driving belts 50, 52, 53 and associated belt pulleys.
  • the transmission ratio may be selected such that the component of the disk circumferential speed in the direction of twist corresponds to the theoretical twist to be imparted to the'threa d by the main false-twist device. If now the main false-twist producer of FIG. 2'is adjusted so that it yields the given theoretical rotation, no torque is imparted to the thread through the disks of the supplementary device according to FIG. 7. If, on the other hand, disturbances occur in the falsetwist producer of FIG. 2, for example, through an increase in the slip,- an equalizing torque or twist is provided'to the thread by the disks of the sup-.
  • FIG. 8 A further supplementary device, which has the same purpose as the supplementary device according to FIG. 7, is shown in FIG. 8.
  • the shaft 24 of the falsetwist producer'of FIG. 2 is shown with the last disk 21 arranged thereon. Shaft 24 is extended somewhat and carries at its upper end a belt pulley and a belt 77.
  • circumferential speed of disk 79 maybe adjusted different than that of the remaining disks of the false-twist producer according to FIG. 2.
  • FIGS. 9'and 10 show an arrangement of a false-twist device in which the friction surfaces are formed by the curved innersurfaces of rotating rings or sleeves 91, 92, 93.
  • the device includes a frame provided with support arms '94, 95, 96 and a base plate 97 (FIG. 9).
  • Shaft 100 is rotatably supported in the base plate97 by a bearings 101.
  • Shaft 100 is driven by the whorl 9and drive belt 10.
  • Shaft 100 extends upwardly and concentrically through round openings in thesupport arms 94, and 96.
  • Support sleeves 102 and 103 are arranged concentrically to shaft and :aresupported for swinging movement in the arms 94 and 96 and swing arms 98 and 99 are swingably-attached to the sleeves 102, 103.
  • the rings 91, 92 and 93 are supported by means of ball bearings in the swingable arm 98, the stationaryarm 95 and the swingable arm 99. They are rotated in the same direction by drive belts 104, 105 and 106 are corresponding belt pulleys 107, 108 and 109 from shaft 100.
  • the swinging arms 98 and 99- are urged outwardly from the support arm 95 by respective springs 114, and spring brackets 112, 113 (FIG. 10).
  • the outward swinging motion of the swing arms 98 and 99 is limited by adjusting screws I16, 117 provided with locknuts 118, 119.
  • the swinging arms 98 and 99 are provided with respective handles 120, 121 whereby the swinging arms may be pressed against the force of the springs 114, 115 so that when the other hand, may also be adjusted such, that the overlapping of the friction disks is different fromthe' overlap of the friction disks of the main false-twist prothey are in an alignedposition, a straight passage for the thread is formed throughout the entire false-twist producer.
  • the thread then is tensioned' and follows a screw-thread line having a triangular cross-section, as shownin FIG. 10.
  • the swing arms 98 and 99 swing outwardly in opposite directions from that shown in FIGS. 9 and 10.
  • thethread passes through each embodiment of the false-twist device in a screw line which is selectable with regard to both the direction of so that the swing direction is ill rotation and the pitch angle.
  • the type of friction surfaces and their size and spacing may be varied to change the embracing angle of the thread around the friction surfaces, the angle by which the thread is running relative to the axis of the friction surfaces, and the overlap of the friction surfaces.
  • a friction false-twist device adapted to produce crimped and curled thread by false-twisting the thread in either S or Z directions, said device including at least one group of at least three endless frictional surfaces of crowned cross-section, means for rotatably supporting the friction surfaces of each group in equally spaced apart position and for rotation in parallel planes substantially perpendicular to the direction of travel of a thread successively engaging said surfaces, and drive means for selectively rotating said frictional surfaces in clockwise and counterclockwise directions, said friction surfaces being supported for different sequential positioning so that the sequential contact points of said frictional surfaces with the thread lie on a screw-thread line preselected according to the direction of rotation of said frictional surfaces.
  • a device according to claim 1 including means for adjustably supporting at least one of said frictional surfaces for movement toward and away from the remaining frictional surfaces.
  • a device according to claim ll wherein said drive.
  • tional surfaces are in the form of endless traveling belts.
  • a device wherein the rotational centers of said three shafts are positioned at the corners of an equilateral triangle and are spaced 65 millimeters apart, said round disks including a plastic frictional outer surface and having a radius of 'millimeters to provide sufiicient overlap that the triangular sides of the path of downward travel of the thread are each 1.8 millimeters long.
  • said frictional surfaces are in the form of groups of four circular bodies of revolution rotating in the same direction, and includingfour shafts each supporting one of said bodies of revolution of each group, means supporting said shafts for rotation with said bodies of rotation in partially overlapped position, and wherein the bodies of rotation of at least three of said shafts are interchangeable in their sequence.
  • a device according to claim 1 wherein said frictional surfaces are in the form of sleeves havingballshaped in'neryarn engaging surfaces.
  • a device according to claim 1 wherein said frictional surfaces are in the form of groups of circular bodies of revolution rotating in the same direction, and wherein certain of said circular bodies of revolution have different radii.
  • a device including an additional group of bodies of revolution in advance of said recited groups of bodies of revolution, said additional groups of bodies of revolution being supported on shafts which are driven from said shafts supporting said recited groups of bodies of revolution.
  • a device including means for driving said additional groups of bodies of revolution at a different speed from said recited groups of bodies of revolution.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US00311886A 1972-03-22 1972-12-04 Friction false-twisting device Expired - Lifetime US3813868A (en)

Applications Claiming Priority (1)

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DE2213881A DE2213881C3 (de) 1972-03-22 1972-03-22 Friktions-Falschdrallvorrichtung

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US (1) US3813868A (it)
JP (2) JPS5245815B2 (it)
DE (1) DE2213881C3 (it)
FR (1) FR2176875B1 (it)
GB (1) GB1430473A (it)
IT (1) IT979919B (it)

Cited By (25)

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Publication number Priority date Publication date Assignee Title
US3940914A (en) * 1974-01-04 1976-03-02 Kugelfischer Georg Schafer & Co. False twister
US3973384A (en) * 1974-12-30 1976-08-10 Monsanto Company Friction aggregate
US3973383A (en) * 1974-12-26 1976-08-10 Monsanto Company Friction falsetwist device
US3994123A (en) * 1973-10-10 1976-11-30 Turbo Machine Company Friction twisting head
US4015414A (en) * 1974-06-12 1977-04-05 The Warner & Swasey Textile Machine Company Monitored twist control apparatus and method
DE2932075A1 (de) * 1979-08-08 1981-02-26 Barmag Barmer Maschf Friktionsfalschdraller
DE3331321A1 (de) * 1982-09-10 1984-03-29 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Friktionsfalschdraller
DE3801506A1 (de) * 1987-02-05 1988-08-18 Barmag Barmer Maschf Falschzwirnkraeuselmaschine
USRE34342E (en) * 1987-02-05 1993-08-17 Barmag Ag Yarn false twist crimping machine
US5349808A (en) * 1989-06-14 1994-09-27 Barmag Ag Yarn twisting disc
US5463861A (en) * 1991-12-12 1995-11-07 Barmag Ag Friction false twist unit
US5644908A (en) * 1993-09-04 1997-07-08 Barmag Ag Yarn false twist crimping apparatus
US5794429A (en) * 1995-05-23 1998-08-18 Barmag Ag Yarn friction false twisting apparatus
US20040134182A1 (en) * 2000-03-03 2004-07-15 Howell James M. Partially oriented poly(trimethylene terephthalate) yarn
FR2855190A1 (fr) * 2003-05-19 2004-11-26 Rieter Icbt Dispositif de reglage et de controle de la stabilite de l'equilibre de tension d'un fil synthetique
WO2005031051A1 (de) * 2003-09-20 2005-04-07 Saurer Gmbh & Co. Kg Falschdrallvorrichtung
US20100024376A1 (en) * 2008-08-04 2010-02-04 The Hong Kong Polytechnic University Method and apparatus for manufacturing slalom false twisting on ring yarn
US20120151894A1 (en) * 2008-08-04 2012-06-21 Xiaoming Tao Method And Apparatus For Reducing Residual Torque And Neps In Singles Ring Yarns
CN103215701A (zh) * 2013-04-18 2013-07-24 武汉纺织大学 一种改善涡流复合纺纱成纱结构的方法
US8549830B1 (en) * 2012-03-27 2013-10-08 Hong Kong Polytechnic University Method and apparatus for imparting false twist to yarn before ring spinning
US20150128555A1 (en) * 2011-10-31 2015-05-14 Shanghai Wool & Jute Textile Research Institute Combined frictional false twisting device for ring spinning frame
WO2015177227A1 (de) * 2014-05-21 2015-11-26 Maschinenfabrik Rieter Ag Spinnmaschine mit einer falschdralleinrichtung
USD827682S1 (en) * 2016-12-02 2018-09-04 Carpet Industry Clearinghouse, Inc. False twist block assembly
US20210189606A1 (en) * 2016-12-19 2021-06-24 Lintec Of America, Inc. Nanofiber yarn spinning system
CN109594165B (zh) * 2019-01-29 2023-09-12 常州市郑陆特种纺机专件有限公司 牵伸型凸轮旋转式无捻纱锭子

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Publication number Priority date Publication date Assignee Title
JPS5128235B2 (it) * 1972-05-29 1976-08-18
JPS50131426A (it) * 1974-04-03 1975-10-17
DE2443238B2 (de) * 1974-09-10 1980-03-20 Fag Kugelfischer Georg Schaefer & Co, 8720 Schweinfurt Reibrotor zum Friktionsfalsehdrallen von synthetischen Fäden
JPS5285546A (en) * 1976-01-01 1977-07-15 Teijin Ltd Friction false twisting apparatus
DE3324243A1 (de) * 1982-07-09 1984-02-16 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Falschzwirnkraeuselmaschine und verfahren zur ueberbrueckung kurzzeitiger spannun gsausfaelle an textilmaschinen
DE102013108094A1 (de) * 2013-07-29 2015-01-29 Maschinenfabrik Rieter Ag Spinnmaschine und Falschdralleinrichtung
DE102022004597A1 (de) 2022-12-08 2024-06-13 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum Falschdrallen eines synthetischen Fadens

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GB854780A (en) * 1957-06-11 1960-11-23 Scragg & Sons Improvements in and relating to apparatus for twisting yarn
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GB854780A (en) * 1957-06-11 1960-11-23 Scragg & Sons Improvements in and relating to apparatus for twisting yarn
US2923121A (en) * 1957-06-21 1960-02-02 Hobourn Aero Components Ltd Apparatus for imparting twists to yarns
GB892791A (en) * 1959-08-01 1962-03-28 Scragg & Sons Improvements in apparatus for false-twisting yarns
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Cited By (35)

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US3994123A (en) * 1973-10-10 1976-11-30 Turbo Machine Company Friction twisting head
US3940914A (en) * 1974-01-04 1976-03-02 Kugelfischer Georg Schafer & Co. False twister
US4015414A (en) * 1974-06-12 1977-04-05 The Warner & Swasey Textile Machine Company Monitored twist control apparatus and method
US3973383A (en) * 1974-12-26 1976-08-10 Monsanto Company Friction falsetwist device
US3973384A (en) * 1974-12-30 1976-08-10 Monsanto Company Friction aggregate
DE2932075A1 (de) * 1979-08-08 1981-02-26 Barmag Barmer Maschf Friktionsfalschdraller
DE3331321A1 (de) * 1982-09-10 1984-03-29 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Friktionsfalschdraller
US4809494A (en) * 1987-02-05 1989-03-07 Barmag Ag Yarn false twist crimping machine
DE3801506A1 (de) * 1987-02-05 1988-08-18 Barmag Barmer Maschf Falschzwirnkraeuselmaschine
USRE34342E (en) * 1987-02-05 1993-08-17 Barmag Ag Yarn false twist crimping machine
US5349808A (en) * 1989-06-14 1994-09-27 Barmag Ag Yarn twisting disc
US5463861A (en) * 1991-12-12 1995-11-07 Barmag Ag Friction false twist unit
US5644908A (en) * 1993-09-04 1997-07-08 Barmag Ag Yarn false twist crimping apparatus
US5794429A (en) * 1995-05-23 1998-08-18 Barmag Ag Yarn friction false twisting apparatus
US20040134182A1 (en) * 2000-03-03 2004-07-15 Howell James M. Partially oriented poly(trimethylene terephthalate) yarn
US6998079B2 (en) 2000-03-03 2006-02-14 E. I. Du Pont De Nemours And Company Process of making partially oriented poly(trimethylene terephthalate) yarn
WO2004104280A2 (fr) * 2003-05-19 2004-12-02 Rieter Textile Machinery France Dispositif de reglage et de controle de la stabilite de l’equilibre de tension d’un fil synthetique
WO2004104280A3 (fr) * 2003-05-19 2005-05-19 Rieter Textile Machinery Fr Dispositif de reglage et de controle de la stabilite de l’equilibre de tension d’un fil synthetique
FR2855190A1 (fr) * 2003-05-19 2004-11-26 Rieter Icbt Dispositif de reglage et de controle de la stabilite de l'equilibre de tension d'un fil synthetique
WO2005031051A1 (de) * 2003-09-20 2005-04-07 Saurer Gmbh & Co. Kg Falschdrallvorrichtung
US8544252B2 (en) * 2008-08-04 2013-10-01 The Hong Kong Polytechnic University Method and apparatus for reducing residual torque and neps in singles ring yarns
US20100024376A1 (en) * 2008-08-04 2010-02-04 The Hong Kong Polytechnic University Method and apparatus for manufacturing slalom false twisting on ring yarn
WO2010015185A1 (en) * 2008-08-04 2010-02-11 The Hong Kong Polytechnic University Method and apparatus for manufacturing slalom false twisting on ring yarn
US20120151894A1 (en) * 2008-08-04 2012-06-21 Xiaoming Tao Method And Apparatus For Reducing Residual Torque And Neps In Singles Ring Yarns
US9347152B2 (en) * 2011-10-31 2016-05-24 Shanghai Wool & Jute Textile Research Institute Combined frictional false twisting device for ring spinning frame
US20150128555A1 (en) * 2011-10-31 2015-05-14 Shanghai Wool & Jute Textile Research Institute Combined frictional false twisting device for ring spinning frame
US8549830B1 (en) * 2012-03-27 2013-10-08 Hong Kong Polytechnic University Method and apparatus for imparting false twist to yarn before ring spinning
CN103215701B (zh) * 2013-04-18 2015-07-22 武汉纺织大学 一种改善涡流复合纺纱成纱结构的方法
CN103215701A (zh) * 2013-04-18 2013-07-24 武汉纺织大学 一种改善涡流复合纺纱成纱结构的方法
WO2015177227A1 (de) * 2014-05-21 2015-11-26 Maschinenfabrik Rieter Ag Spinnmaschine mit einer falschdralleinrichtung
CN106460253A (zh) * 2014-05-21 2017-02-22 里特机械公司 具有假捻设备的纺纱机
USD827682S1 (en) * 2016-12-02 2018-09-04 Carpet Industry Clearinghouse, Inc. False twist block assembly
US20210189606A1 (en) * 2016-12-19 2021-06-24 Lintec Of America, Inc. Nanofiber yarn spinning system
US11913142B2 (en) * 2016-12-19 2024-02-27 Lintec Of America, Inc. Nanofiber yarn spinning system
CN109594165B (zh) * 2019-01-29 2023-09-12 常州市郑陆特种纺机专件有限公司 牵伸型凸轮旋转式无捻纱锭子

Also Published As

Publication number Publication date
JPS4913457A (it) 1974-02-05
DE2213881A1 (de) 1973-10-25
IT979919B (it) 1974-09-30
GB1430473A (en) 1976-03-31
DE2213881B2 (de) 1978-03-30
JPS528158A (en) 1977-01-21
FR2176875A1 (it) 1973-11-02
DE2213881C3 (de) 1978-11-30
JPS5245815B2 (it) 1977-11-18
JPS5247057B2 (it) 1977-11-30
FR2176875B1 (it) 1977-09-02

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