US3780512A - Process and device for producing fancy ply yarns with high efficiency uptwisters - Google Patents

Process and device for producing fancy ply yarns with high efficiency uptwisters Download PDF

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Publication number
US3780512A
US3780512A US00220820A US3780512DA US3780512A US 3780512 A US3780512 A US 3780512A US 00220820 A US00220820 A US 00220820A US 3780512D A US3780512D A US 3780512DA US 3780512 A US3780512 A US 3780512A
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Prior art keywords
yarn
core
fancy
ply
effect
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US00220820A
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English (en)
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M Ratti
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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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/34—Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns
    • D02G3/343—Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns using hollow spindles
    • 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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/34—Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns

Definitions

  • the present invention pertains to a process and device for producing fancy ply yarns with high efficiency uptwisters having axially bored core spindles, which ing thus avoiding the successive heat fixation treatment (steaming) and also allowing a production rate greater than that of the ring twister under similar conditions.
  • At least two of the yarns making up the ply yarn are twisted in opposite directions and at least one of the yarns making up the ply yarn is subjected during the twisting process to a variable winding-off speed.
  • the device which carries out the above said process is characterized by a plurality of bobbins or axially bored spindles each suited to provide a thread forming the ply yarn and by an optional fixed bobbin providing the core, said bobbins and spindles being arranged one after the other on the same axis and of which at least two revolve in opposite directions and characterized by at least a mechanism to periodically pull and release the yarnthat must be subjected to a variable windingoff speed.
  • FIG. 1 is a schematic view of a ring twister generally used to obtain fancy ply yarns
  • FIG. 2 is a high efficiency uptwister of the normal type with axially bored spindles, which does not allow one to obtain the fancy ply yarn which can be obtained by means of the ring twister shown in FIG. 1;
  • FIG. 3' is a schematic view of a high efficiency uptwister modified according to thepresent invention, which allows one to obtain the desired fancy ply yarn;
  • FIG. 4 shows a fragmentary view of the mechanism which during the twisting process imparts a variable winding-off speed to one ofthe threads making up the ply yarn
  • FIG. 5 is a front view of a portion of the ply yarn obtained by the device of FIG. 3;
  • FIGS. 6a, 6b and 6c show three further possible shapes of fancy ply yarns which can be obtained by the device shown in FIG. 3;
  • FIG. 7 is an alternate arrangement for the device of the present invention.
  • FIGS. 8d and 8e shows two possible shapes of fancy ply yarns which can be obtained by the device of FIG. 7.
  • fancy ply yarn indicates a yarn which consists of one or more threads different from each'other in color, kind of each single thread and length of each of said component threads.
  • FIGS. 6a, 6b and 6c and FIGS. 8d and 8e it can be seen how the shown ply yarn gives a quite different visual impression depending either one or more component threads are helically twined with a different pitch around a yarn acting as a central core, and also because said spiraling'presents here and there a number of windings brought close to each other in order to form a kind of knot or knop.”
  • Fancy ply yarns of this type meet with the favour of the public today and it is therefore important to be able to produce them not only by means of the ring twisters schematically shown in FIG. l, as it is presently common in the art, but also preferably by means of the high process prevents the completed ply yarn from untwist- 2 efficiency uptwisters, shown in FIG. 2, not suitable so far for this type of production.
  • FIG. 1 For a fuller understanding of the differences between the operation of the ring twister and the operation of the high efficiency uptwister reference is made to FIG. 1, in which a fancy ply yarn is obtained as follows: from a fixed tapered bobbin the thread 2, which is one of the components of the fancy ply yarn to be manufactured is drawn off by means of the feed rollers 3 and 4 to be delivered through the guide eye 5 to the revolving ring 6 of a spindle 7. Similarly, from the fixed tapered bobbin 8 the thread 9 pulled along by the rollers 10, 11 is also drawn through the guide eye 5 and delivered to the twisting ring 6 of the revolving spindle 7.
  • the ring 6 moves up and down parallel to arrows l2 distributing the ply yarn allover the surface of the rotating spindle
  • varying the feeding speed of the thread 2 by means of the rollers 3, 4, that is by varying the angular speed of the rollers 3,4 one of the two threads, for example the thread 2, is made to arrive at the ring 6 more slowly or even to stop, while the other thread 9 is delivered to the ring 6 at constant speed.
  • the ply yarn obtained by the ring twister just described presents a serious disadvantage; the two threads 2 and 9 being twined in the same direction around the revolving spindle 7, when the twisting process is completed and the ply yarn is unwound from the spindle, it tends to distort due to the inner elasticity of its components and mainlybecause the two threads, as mentioned, have been twisted in the same direction. A fabric made of said fancy ply yarn would then present waviness with unpleasant visual impression.
  • the thread wound around the spindle 7 is subjected after the twisting operation to a heat fixation operation, so'called steaming," to fix the component threads in their position finally reached.
  • the above mentioned high efficiency uptwister consists of a bobbin or spindle 13 and of a coaxial bobbin or spindle 14.
  • the thread 15 which unwinds from the lower spindle 13 passes through the hollow axis 16 of the upper spindle l4 and goes to the take-up bobbin 17. If the lower spindle 13 is stationary and the upper spindle l4 revolves in a certain direction, the thread 15 does not twist and act as a core around which the thread 18 helically twines coming from the spindle 14'.
  • a mechanism is inserted along the passage of one of the two threads 15 and 18 and specifically, in the illustrated case, along the passage of the thread 15 coming from the lower spindle 13, which mechanism allows to draw off the thread itself at variable speed.
  • Said mechanism consists of three little pulleys 19,20, 21 the first two of which pulleys face each other and are stationary, while the third pulley 21 lies in between and can move back and forth alternately parallel to the arrows 22,23 along the path A-B.
  • FIG. 7 a further improvement is shown: the thread 15 which constitutes the core of the ply yarn is unwound from the lower bobbin 28 which is stationary and around it are twisted in opposite directions the threads 18 and 18' respectively, the first coming from the spindle 13 which revolves in one direction and the second coming from the spindle 14 which revolves in the opposite direction but at the same speed.
  • the device formed by the three pulleys 19, 20, 21 as illustrated in FIG. 7 can also be inserted between the bobbins 13 and 14 thus obtaining other fancy effects for the ply yarn, as illustrated in FIG. 8e.
  • the removal of the defect of distortion from the fancy ply yarn obtained according to this invention is not the only advantage characteristic of this invention.
  • Another important advantage is obtained with respect to the ply yarn produced with ring twisters, such advantage consisting in a production rate which is 4 or 5 times greater.
  • a process for producing fancy yarn comprising twisting a core yarn in one direction, winding an effect yarn about the core yarn in the opposite direction, and varying the speed of travel of the core yarn thereby to vary the spacing of the turns of effect yarn on the core yarn, the direction of twist of the core yarn and the direction of winding of the effect yarn remaining constant.
  • Apparatus for producing fancy yarn comprising means to supply a core yarn, means to twist said core yarn continuously in one direction, means to wind about said core yarn an effect yarn continuously in the opposite direction, and means to vary the speed of travel of the core yarn relative to the winding means for the effect yarn thereby to impart variable spacing to the turns of effect yarn about the core yarn.
  • Apparatus as claimed in claim 3 and means to wind a second effect yarn about said core yarn continuously in the opposite direction from and after the firstmentioned effect yarn.
  • Apparatus as claimed in claim 4 and means to vary the speed of that portion of the core yarn which receives said second effect yarn relative to that portion of the core yarn that receives only the first-mentioned effect yarn thereby to impart to the core yarn three different velocities.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US00220820A 1971-02-10 1972-01-26 Process and device for producing fancy ply yarns with high efficiency uptwisters Expired - Lifetime US3780512A (en)

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IT2040471 1971-02-10

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US3780512A true US3780512A (en) 1973-12-25

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US (1) US3780512A (cg-RX-API-DMAC7.html)
CH (1) CH539701A (cg-RX-API-DMAC7.html)
DE (1) DE2203515A1 (cg-RX-API-DMAC7.html)
FR (1) FR2124550B1 (cg-RX-API-DMAC7.html)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030154706A1 (en) * 2000-07-06 2003-08-21 Rudolf Meier Method for creating markings on a planar textile body
CN113699632A (zh) * 2021-10-12 2021-11-26 浙江依瑞羊绒制品有限公司 一种丝绒复合纱线及其加工工艺

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2502195A1 (fr) * 1981-03-23 1982-09-24 Mayor Sa Procede de fabrication d'un fil flamme continu et dispositif pour sa mise en oeuvre
FR2575195B1 (fr) * 1984-12-21 1988-03-18 Lancon Pierre Installation pour la fabrication de fils fantaisie

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030154706A1 (en) * 2000-07-06 2003-08-21 Rudolf Meier Method for creating markings on a planar textile body
JP2004502054A (ja) * 2000-07-06 2004-01-22 ツエルヴエーゲル・ルーヴア・アクチエンゲゼルシヤフト 繊維扁平形成物上にマークを形成する方法
US6973769B2 (en) * 2000-07-06 2005-12-13 Uster Technologies Ag Method for creating markings on a planar textile body
CN113699632A (zh) * 2021-10-12 2021-11-26 浙江依瑞羊绒制品有限公司 一种丝绒复合纱线及其加工工艺

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Publication number Publication date
FR2124550B1 (cg-RX-API-DMAC7.html) 1974-12-13
FR2124550A1 (cg-RX-API-DMAC7.html) 1972-09-22
DE2203515A1 (de) 1972-08-24
CH539701A (it) 1973-07-31

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