US3791122A - False twist process and apparatus - Google Patents

False twist process and apparatus Download PDF

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Publication number
US3791122A
US3791122A US00234777A US3791122DA US3791122A US 3791122 A US3791122 A US 3791122A US 00234777 A US00234777 A US 00234777A US 3791122D A US3791122D A US 3791122DA US 3791122 A US3791122 A US 3791122A
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United States
Prior art keywords
rollers
twist
pair
tubes
friction
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Expired - Lifetime
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US00234777A
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English (en)
Inventor
J Raschle
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Heberlein and Co AG
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Heberlein and Co 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

Definitions

  • ABSTRACT Yarn to be texturized by false twist is passed axially and sequentially through tubes, the input and output angles of the yarn in respect of the tube axes totaling between 300 and 600.
  • twist tubes contain pins, edges or the like, which are so-arranged that they force the yarn passing through the twist tube to rotate with the latter. It is furthermore known to support the twist in tangential contact with axially parallel rollers and to press the same against the latter by means of magnets, the drive being effected by means of one of the rollers. Using this system, revolution speeds of the twist tubes of several hundred thousand revolutions per minute can be obtained. Illustrative references to apparatus of this type may be found in U. S. Pat. No. 3,475,895 and No. 3,518,824.
  • twist imparter which consists of a socket with widened end portions and with a smooth convex inner surface of a material with a high coefficient of friction, such as rubber.
  • a twist imparter which consists of a socket with widened end portions and with a smooth convex inner surface of a material with a high coefficient of friction, such as rubber.
  • the use of this, as well as other rubber-like materials with a high coefficient of friction involves the disadvantages that, while false-twisting synthetic yarns, they are subject to excessive wear so that the convex inner surface must be frequently renewed, causing many costly interruptions in machine operation.
  • the process of the present invention consists in passing the yarn, in sequence, through at least two friction twist tubes, which is done under input and output angles, the sum of which is between 300 and 600.
  • the yarn may be passed through the friction twist tubes in the same or in opposite directions, the twist tubes rotating in the same or in opposite senses.
  • FIGS. 1 and 3 are elevational views illustrating pairs of rollers and twist tubes arranged according to the present invention
  • FIGS. 7 and 8 illustrate a friction twist tube with magnetic fixation in top view and in lateral elevation, respectively.
  • FIGS. 1 and 2 contemplate an arrangement involving four rollers in two pairs, only three of which 1, l and 2 are shown.
  • the axes of each pair of rollers are parallel and are arranged one behind the other.
  • the rollers l and 2 are fixed on a drive shaft 3 on which a further roller 4 is arranged over which a drive belt 5 is passed.
  • the two rollers 1 and 2 (the latter not shown, is behind roller 2 in FIG. 1) are fixed on another drive shaft 3.
  • a friction twist tube 6 is supported, and this tube is pressed against the rollers by means of a permanent magnet (not shown).
  • a friction twist tube 7 is supported and is similarly pressed against the rollers 2, 2' by meana of a permanent magnet (not shown).
  • the yarn 8 is fed to one end of the friction twist tube 6 under an input angle of approximately passes through the twist tube and leaves it under an output angle of approximately 90. Thereafter, the yarn 8 is fed to one end of the friction twist tube 7 again under an input angle of approximately 90 and leaves the same at the other end under an output angle of approximately 90.
  • the sum of the input and output angles thus amounts to approximately 360. Since yarn 8 is passed through both friction tubes 6 and 7 axially and in the same direction, the numbers of twists imparted in the same are, therefore, added to each other.
  • FIGS. 3 and 4 differs from that of FIGS. 1 and 2 only in that friction twist tubes 7, 7' are supported in boththroats of rollers 2, 2'.
  • the yarn 8 is fed to and through the tubes 6 and 7 in the manner described in respect of FIGS. 1 and 2, and after having left the friction twist tube 7, is fed to the friction twist tube 7' under an input angle of approximately 90, passes through the same axially in a direction opposite to the direction by which it is passed through friction twist tubes 6 and 7 and leaves tube 7' under an output angle of approximately 90;
  • a false-twist is thus imparted to the yarn, which is opposite to the false-twist produced by the twist tubes 6 and 7.
  • the sum of the input and output angles thus amounts to approximately 540.
  • This particular form of the apparatus of the invention may be used, for example, for imparting to the yarn, after usual texturing by false-twist, a further false-twist treatment in opposite direction without heat-setting in order to prevent the formation of crinkles when the yarn is pulled offa bobbin overhead before introduction into a processing machine.
  • rollers l0, l0 and 11, 11' are arranged in axial parallelism.
  • On the drive shafts l2, 13 of the rollers 10, 11, are fixed further rollers 14, 15 over which the belt 16 runs, as shown in FIG. 6, and drives the shafts l2, 13 with equal speeds in opposite directions.
  • the rollers 10, 11' are fixed on the shafts l2, l3.
  • FIGS. 7 and 8 for example, the pressing of a friction twist tube 20 against rollers 21, 22 by means of a permanent horseshoe magnet 23 is shown,
  • the U plane of the magnet 23 is vertical, and at the ends of its legs are provided horizontal pole shoes 24, 24.
  • the friction twist tube 20, which may be of non-magnet material, bears an enlarged central portion 25 of magnetic material which may, for example, consist of a pack of adjacent discs of low loss sheet iron.
  • a process for imparting false-twist to textile yarns in which the yarn is passed through at least two rotating friction twist tubes each supported on a pair of rotating rollers, the pair of rollers having parallel axes of rotation, said twist tubes being so arranged that the sum total of the input anglesand output angles between the directions of travel of the yarn and the rotational axes of the twist tubes amounts to between 300 and 600.
  • Apparatus for producing false-twist in textile yarns comprising at least two friction twist tubes, at least two pairs of rollers rotatable about their axes and supported to form cuneate throats therebetween, means pressing said twist tubes in the throats between said rollers, and means for driving at least one of said rollers of each pair.
  • Apparatus for producing false-twist in textile yarns comprising two friction twist tubes, two pairs of rollers rotatable about their axes and supported to form cuneate throats therebetween and magnetic means pressing each friction twist tube in the throats between the rollers of one of said pair of rollers, said pair of rollers being arranged one behind the other and the rollers of each pair of rollers situated opposite one another being fixed on the same shaft one of which is provided with a roller over which a drive belt is passed.
  • Apparatus for producing false-twist in textile yarns comprising three friction twist tubes, two pairs of rollers rotatable about their axes and supported to form cuneate throats therebetween and magnetic means pressing two of the friction tubes in the throats of one of said pair of rollers and the third friction twist tube in one throat of the second pair of rollers both pair of rollers being arranged one behind the other and the rollers of each pair of rollers situated opposite one another being fixed on the same shaft one of which is provided with a roller over which a drive belt is passed.
  • Apparatus for producing false-twist in textile yarns comprising two friction twist tubes two pair of rollers rotatable about their axes and supported to form cuneate throats therebetween and magnetic means pressing each friction twist tube in the throat between the rollers of one of said pair of rollers said pair of rollers being arranged in axial parallelism and each of the shafts of one of the rollers of each pair of said rollers being provided with a further roller over which a drive belt is passed driving said further rollers with equal speeds in opposite directions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Looms (AREA)
US00234777A 1971-03-18 1972-03-15 False twist process and apparatus Expired - Lifetime US3791122A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH403171A CH529238A (de) 1971-03-18 1971-03-18 Falschdrahtzwirnmaschine mit Friktionsdrallgebern

Publications (1)

Publication Number Publication Date
US3791122A true US3791122A (en) 1974-02-12

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ID=4268507

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Application Number Title Priority Date Filing Date
US00234777A Expired - Lifetime US3791122A (en) 1971-03-18 1972-03-15 False twist process and apparatus

Country Status (5)

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US (1) US3791122A (tr)
CH (1) CH529238A (tr)
DE (1) DE2211573A1 (tr)
FR (1) FR2129584A5 (tr)
GB (1) GB1375606A (tr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943693A (en) * 1973-10-01 1976-03-16 Heberlein Maschinenfabrik Ag. Apparatus for false-twist texturing of textile yarns
US3969883A (en) * 1973-10-19 1976-07-20 Chavanoz S.A. Spindle for false twist by friction

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3313096A (en) * 1963-04-19 1967-04-11 Societex Devices for driving bodies revolving at high speeds, and in particular false twist spindles in crimping machines
US3348370A (en) * 1959-02-25 1967-10-24 Gassner Hans Drive arrangement for false twisting devices
US3451206A (en) * 1967-01-26 1969-06-24 Alexander W P Mackintosh Machines for imparting twist to yarns
US3530659A (en) * 1968-01-23 1970-09-29 Scragg & Sons Textile apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348370A (en) * 1959-02-25 1967-10-24 Gassner Hans Drive arrangement for false twisting devices
US3313096A (en) * 1963-04-19 1967-04-11 Societex Devices for driving bodies revolving at high speeds, and in particular false twist spindles in crimping machines
US3451206A (en) * 1967-01-26 1969-06-24 Alexander W P Mackintosh Machines for imparting twist to yarns
US3530659A (en) * 1968-01-23 1970-09-29 Scragg & Sons Textile apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943693A (en) * 1973-10-01 1976-03-16 Heberlein Maschinenfabrik Ag. Apparatus for false-twist texturing of textile yarns
US3969883A (en) * 1973-10-19 1976-07-20 Chavanoz S.A. Spindle for false twist by friction

Also Published As

Publication number Publication date
DE2211573A1 (de) 1972-09-21
CH529238A (de) 1972-10-15
FR2129584A5 (tr) 1972-10-27
GB1375606A (tr) 1974-11-27

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