US3740939A - Multi purpose device for the texturizing of textile threads by false twist - Google Patents

Multi purpose device for the texturizing of textile threads by false twist Download PDF

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Publication number
US3740939A
US3740939A US00187798A US3740939DA US3740939A US 3740939 A US3740939 A US 3740939A US 00187798 A US00187798 A US 00187798A US 3740939D A US3740939D A US 3740939DA US 3740939 A US3740939 A US 3740939A
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United States
Prior art keywords
thread
cylinder
cylinder means
tube
cylinders
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Expired - Lifetime
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US00187798A
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English (en)
Inventor
J Neveux
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Moulinage et Retorderie de Chavanoz SA
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Moulinage et Retorderie de Chavanoz SA
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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 A multi-purpose device for texturing textile threads by [30] Fore'gn Application Data application of false twist comprising a false twist tube Oct. 12, 1970 France 7037046 having a c ogs-pin for engagement with a thread passing therethrough, a pair of rotatable cylinders having [52] US. Cl.
  • the present invention concerns a new multi-purpose device for the texturing of textile threads by false twist.
  • the texturizing of a thread by false twist was done either by means of devices comprising a false twist tube, or spindle, in which the thread passes and which, by rotation, gives the thread a temporary overtwist which is set thermally, or by means of devices which give the thread a temporary over-twist by friction of the thread against a surface, also set thermally.
  • French Pat. 1,284,485 and Italian Pat. 698,343 describe devices for false twist by friction formed of two hollow cylindrical elements, with parallel axes and turning in opposite directions, the thread passing inside these cylinders and rubbing against the edges of the cylinders which are formed of a material with a high coefficient of friction.
  • the device for texturing by false twist comprises at least one tube having a bar (or pin) mounted for turning in tangential contact with two cylinders with parallel axes, turning in the same direction, the turning tube being pressed against the cylinders by magnetic means, and it is characterized in that in one part at least one of the cylinders has a longitudinal conduit which has on the inside at least one element of friction and that, in the other part, elements for the return of the thread are arranged upstream and downstream of the two hollow cylinders.
  • the two cylinders are hollow and comprise friction surfaces at their extremities, of a material with a high coefficient of friction, said surfaces being preferably curved.
  • the elements for the return and guiding of the thread placed up and downstream of each hollow cylinder, allow passing the thread either in the spindle, or tube, which allows to give it a classical false twist, or in at least one of the cylinders provided with friction elements.
  • circular guides are used whose diameter is large and advantageously larger than 8 mm in order not to block the twist given the thread by the friction elements.
  • the guiding means allow numerous combinations in the path of the thread.
  • the false twist device comprises at least two return i more than two return guides placed up and downstream of each of the hollow cylinders so that the thread, during its treatment, passes in both hollow cylinders, the direction of passage of the thread in the second hollow cylinder being either opposite or identical to the direction of passage of the thread in the first cylinder, the thread being placed in contact with all the friction surfaces or only with certain of these surfaces.
  • the position of at least one of the return guides is adjustable and the guides are advantageously off-center with respect to at least one of the longitudinal axes of the hollow cylinders.
  • FIG. I shows schematically an overall view of a texturing loom equipped with a device according to the invention.
  • FIG. 2 shows a schematic view of the device according to the invention.
  • FIG. 3 which is a variant of FIG. 1, shows an example in which the path of the thread is modified and extended after the exit from the heat-setting oven.
  • FIGS. 4, 5 and 6 show various possibilities of execution of the device according to the invention, the twists given by the friction elements being cumulative.
  • FIG. 7 shows an example in which the twist given by the first hollow cylinder is at least partially cancelled by that given in the second hollow cylinder.
  • FIG. 1 is a schematic view of a loom for texturing by false twist
  • a thread 1 stocked on a spool 2 is unwound by a driven thread delivery device 3 and then passes in a heating box 4 before being subjected to the action of a false twist device 5. It is then drawn by a second thread delivery device 6 and finally rewound in the form of a spool 7.
  • FIG. 2 The execution and the operation of a false twist device 5, according to the present invention, are illustrated by FIG. 2.
  • this false twist device consists of a revolving spindle 8 mounted in tangential contact with the two sets of disks 11, 12, I3 and 14 integrally attached to the two cylinders 9 and 10 with parallel axes.
  • the spindle 8 is pressed against disks ll, 12, 13, 14 by magnetic means not represented in the diagram.
  • the driving in rotation of the assembly is done by a belt 15 which drives cylinder 9 tangentially.
  • this diagram does not show the bearings in which the hollow cylinders revolve.
  • Each of the two cylinders 9 and comprises a longitudinal conduit 16 and 17, the friction elements 18, 19 and 20 and 21 being placed at the extremities of the two conduits l6 and 17. Also, return rollers 22, 23, 24, 25, 26, 27 and 28 are placed upstream and downstream of the two hollow cylinders 9 and 10 and allow modifying the path of the thread in the false twist device.
  • the length of the ho]- low cylinders is near 100 mm and the inside diameter of the conduit is 3 mm, a funnel shaped friction element being placed at each extremity of the hollow cylinders.
  • the belt drives in rotation cylinder 9 which communicates its movement of rotation to spindle 8 by means of rollers or disks 13 and 14, the spindle 8 in turn driving cylinder 10 by means of rollers or disks 1 1 and 12. Consequently the two cylinders 9 and 10 turn in the same direction.
  • the thread at the exit from the oven 4 can pass either directly in the false twist spindle 8 before being rewound, the path being represented in long and short dashed lines 1a in the diagram or, by means of return elements 22 and/or 23 and/or 24 and/or 25 and/or 26 and/or 27, the thread can pass inside conduits 16 and 17 of the hollow cylinders, and thus come to rub on the friction surfaces 21 and/or and/or 19 and/or 18, one of the possible paths being represented in dashed lines lb.
  • FIG. 3 shows an example in which the path of the thread is modified after the exit from the setting oven which allows, during high speed treatments, to obtain a better cooling, a better distribution of the twist, and consequently a thread having uniform properties along its entire length.
  • FIGS. 4, 5, 6 and 7 show various possibilities of paths for the thread. On these figures only the friction surfaces 18, 19, 20, and 21 and the return elements have been shown schematically.
  • FIG. 4 shows a path with contact of the thread 1 on two friction elements 20, 21 placed at both extremities of tube 9, the twist given by surface 20 being of the same direction as that given by surface 21.
  • FIG. 5 shows a path with contact of the thread on three friction surfaces, the twist given by surface 18 being of the same direction as those given by surfaces 20 and 21.
  • FIG. 6 shows a path with contact of the thread on four friction surfaces, the twists given by surfaces 18, 19, 20 and 21 being of like direction.
  • FIG. 7 shows a path with contact of the thread on three friction surfaces 21, 20 and 18, the twists given by surfaces 20, 21 being of opposite direction with respect to that given by surface 18.
  • the defice of the present invention allows treating a thread in many different ways which allow obtaining threads having different aspects and EXAMPLE I
  • a thread of polyhexamethylene adipamide 22 dtex/3 strands is subjected to the action of two friction surfaces 21 and 20, the path of the thread being determined by the guiding elements 22 and 23.
  • the conditions of treatment are as follows:
  • the thread obtained is puffed and has an elasticity of 250 percent.
  • EXAMPLE 2 The previous example is repeated, but with the thread following the path illustrated by FIG. 5, the thread being in contact with the three friction elements 18, 20 and 21, and the path of the thread being determined by guiding elements 22, 25 and 28.
  • the thread obtained has an elasticity of 321 percent.
  • EXAMPLE 3 In this example, illustrated by FIG. 7, a thread of polyhexamethylene adipamide 22 dtex/7 strands is subjected to the action of the three friction surfaces 21, 20 and 18.
  • the conditions of treatment are as follows:
  • the twist communicated by surface 18 is opposite in direction to that communicated by surfaces 20 and 21 and the thread has an elasticity of 256 percent, reduced with respect to example 2, in which the three friction surfaces give the thread twists of like direction.
  • a device for false twist texturing thread of thermoplastic material comprising at least one false twist tube having a cross-pin, a pair of rotatable cylinder means having spaced parallel central axes, magnetic means mounting said false twist tube for rotation in tangential contact with said pair of cylinder means, at least one of said cylinder means having a central longitudinal conduit for the passage of a thread, friction means positioned in said longitudinal conduit for peripheral en gagement of a thread passing therethrough to impart twist thereto, and thread guide means positioned upstream and downstream of said cylinder means for directing thread in a selected path to and from said false twist tube and said rotatable cylinder means.
  • each of said pair of cylinder means has a conduit for the passage of thread therethrough, and said friction means comprises friction surfaces positioned at extremities of each of said conduits for engaging the thread.
  • said thread guide means comprise at least two thread return guides, one of said thread return guides positioned upstream and at least one other of said return guides positioned downstream of the cylinder means.
  • each of said thread return guides is off-center with respect to at least one of the axes of the thread conduits of said cylinder means.
  • Apparatus for false twisting a running yarn strand comprising a pair of rotatable cylinder means, at least one of said cylinder means having an axially positioned thread passageway therethrough and friction means positioned in said passageway for engaging a strand passing therethrough to impart twist thereto during rotation of said cylinder means, spindle means including a tube having a cross-pin therein for engaging a strand passing through said tube to twist the strand during rotation of said tube, means rotatably mounting said spindle means in peripheral engagement with said cylinder means whereby rotation of said cylinder means imparts rotation to said spindle means, and strand guide means positioned adjacent said cylinder means and spindle means for directing a strand in selected paths through said cylinder means and/or spindle means.
  • said cylinder means includes a pair of hollow cylinders positioned with their central axes in parallel spaced relation, and means extending radially outwardly from the surface of each of said cylinders and engaging said spindle means to supportably position it for rotation therewith, the central axis of said tube of said spindle means being generally parallel to the central axes of said cylinders, and means for driving one of said cylinders to impart rotation to said tube and other cylinder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
US00187798A 1970-10-12 1971-10-08 Multi purpose device for the texturizing of textile threads by false twist Expired - Lifetime US3740939A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7037046A FR2109364A5 (enExample) 1970-10-12 1970-10-12

Publications (1)

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US3740939A true US3740939A (en) 1973-06-26

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ID=9062707

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Application Number Title Priority Date Filing Date
US00187798A Expired - Lifetime US3740939A (en) 1970-10-12 1971-10-08 Multi purpose device for the texturizing of textile threads by false twist

Country Status (8)

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US (1) US3740939A (enExample)
BE (1) BE773377A (enExample)
CA (1) CA941697A (enExample)
DE (1) DE2150541A1 (enExample)
FR (1) FR2109364A5 (enExample)
GB (1) GB1325966A (enExample)
LU (1) LU64043A1 (enExample)
NL (1) NL7113866A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879927A (en) * 1973-03-20 1975-04-29 Bayer Ag False twisting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3879927A (en) * 1973-03-20 1975-04-29 Bayer Ag False twisting device

Also Published As

Publication number Publication date
NL7113866A (enExample) 1972-04-14
CA941697A (en) 1974-02-12
DE2150541A1 (de) 1972-04-13
GB1325966A (en) 1973-08-08
BE773377A (fr) 1972-01-17
LU64043A1 (enExample) 1972-04-12
FR2109364A5 (enExample) 1972-05-26

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