US3306023A - Process for forming twisted fibre assemblies - Google Patents

Process for forming twisted fibre assemblies Download PDF

Info

Publication number
US3306023A
US3306023A US3306023DA US3306023A US 3306023 A US3306023 A US 3306023A US 3306023D A US3306023D A US 3306023DA US 3306023 A US3306023 A US 3306023A
Authority
US
United States
Prior art keywords
twist
yarn
strands
zones
fold
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Publication date
Application granted granted Critical
Publication of US3306023A publication Critical patent/US3306023A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
    • D02G3/28—Doubled, plied, or cabled threads
    • D02G3/286—Doubled, plied, or cabled threads with alternatively "S" and "Z" direction of twist, e.g. Self-twist process

Definitions

  • Such an assembly will hereinafter, for the sake of convenience, be called selftwistthread or, where appropriate, more specifically, a self-twist yarn and the individual components will be called strands
  • a self-twist yarn can be produced at much faster rates than conventional plied yarns.
  • simple selftwist yarns have regions of no plying twist which have low abrasion resistance and also constitute zones of weakness in the yarn. The weaving of simple self-twist yarns therefore can lead to yarn breakage problems in the warp.
  • the regions of no twist may cause a periodicity effect in the appearance of a fabric woven from -a simple self-twist yarn, particularly if the fabric is woven in a single colour. The appearance of such a fabric may render it unsuitable for some applications.
  • a weavable self-twist warp yarn can be produced by suitably phasing the twist change-over regions of the individual strands of the yarn as fully described in our above mentioned co-pending applications, but su-ch yarns may still produce fabrics which suier from a periodicity in appearance.
  • a weavable yarn of satisfactory appearance can be obtained 'by plying together two or more self-twist yarns.
  • each individual strand must be relatively iine and this leads to breakage problems when the individual strands are being separately twisted.
  • a process for forming a twisted thread fromtwo strands compri-sing separately twisting the strands so that they each have repeated along their lengths alternating zones of opposite twist separated by twist change-over regions at which there is no twist, converging the strands so that they twist around one another to form a stable thread, and then inserting unidirectional twist into that thread.
  • the strongest yarn is obtained by applying unidirectional twist not to a selftwist yarn which has -been phased so :as to give maximum strength, but instead to the weaker form of self-twist yarn, i.e. a self-twist yarn in which the twist change-over regions of the individual strands are coincident and the twist zones of the individual strands are completely in phase.
  • the unidirectional twist may be inserted until the thread has unidirectional plying twist which, however, varies in intensity along the length of the thread.
  • FIGURE 1 is a diagrammatic representation of a selftwist yarn formed of two intermittently twisted strands with their twist zones of equal length and in phase,
  • FIGURE 2 is a diagrammatic representation of the configuration taken on by the yarn of FIGURE 1 after a certain amount of unidirectional S-twist has been inserted -into it,
  • FIGURE 3 is a diagrammatic representation of the configuration taken on by the yarn when even further S- twist is inserted into it.
  • FIGURE 4 is a graphic illustration of the manner in which the strength of fa self-twist yarn is increased by the insertion of unidirectional twist into it.
  • FIGURE 1 illustrates diagrammatically a self-twist yarn consisting of two similar alternately opposite-ly twisted strands 5, 6 which -are plied with their twist zones in phase.
  • This type of yarn may be produced by apparatus of a type which is fully described and illustrated in the specification of the above mentioned United States patent and the yarn is identical to the one illustrated in FIGURE lla of that specification. It is lformed by separately twisting strands 5, 6 so that they each haverepeated along their length alternating zones of opposite twist separated .by twist change-over regions at which there is no twist and then converging strands 5, 6 with like twist zones in phase and with the twist change-over regions coincident. Strands 5, 6 then twist around one another to form the stable yarn shown in the ligure.
  • the yarn has alternating zones A and B of opposite plying twist separated by ⁇ short zones C of no plying twist. Throughout zones C there is no twist in either of strands 5, 6, these zones being formed by coinciding twist change-over regions of the strands. Throughout zones A, the individual strands 5, 6 .have Z-twist and the yarn has two-fold or plying S- twist. Throughout zones B, the individual strands 5, 6 have S-twist and the yarn has two-fold Z-twist.
  • unidirectional twist maybe inserted into the yarn of FIGURE 1 until its plying twist is all in the direction of the linserted unidirectional twist.
  • S-twist is added to the yarn. Over zones A in which the individual strands 5, 6 have Z-twist and the yam has two-fold S-twist, the twofold S-twist is reinforced; two-fold S-twist is imparted to the yarn over zones C which originally had no twist; and in zones B, where the individual strands 5, 6 have S- twist and the yarn has two-fold Z-twist, the two-fold twist is removed. A stage is reached at which zones B have no two-fold or plying twist at all.
  • FIGURE 2 The configuration of the yarn at this stage is shown in FIGURE 2.
  • the twofold S-twist of the yarn over zones A has been reinforced, two-fold S-twist has been inserted into the yarn over zones C and the two-fold Z-twist has been removed from the yarn over zone B so that zones B are now large zones which have no two-fold twist at all.
  • strands 5, 6 still have individual S-twist throughout zones B.
  • Zones C are the ones which in the original stable self-twist yarn had no twist at all and constituted weak zones in that y-arn. Because they have now been strengthened by the insertion of twist therein, the strength of the yarn as a whole is greatly increased.
  • FIGURE 4 The increase of strength of the yarn as unidirectional twist is inserted into it is shown graphically in FIGURE 4, in which the yarn strength is shown on axis OY against the inserted unidirection twist on ⁇ the axis OX.
  • the line L shows a typical result.
  • the actual rate of increase of strength will depend on several factors such as the intensity of the twist in the original self-twist yarn and the number of strands in the yarn.
  • a self-tvvist yarn similar to that resulting in curve L but having a greater intensity of self-twist would give the result represented by curve M whereas a selftwist yarn having a smaller intensity of self-twist would give the result shown by curve N.
  • the strength of the yarn is greatly increased by the insertion of the unidirectional twist.
  • a process for forming a twisted thread from at least two strands comprising the steps of:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Description

PRocEss FOR FoRMING TWISTED FIBRE AssEMBLIEs D..E. HENSHAW ETAL 2' Sheets-Sheet l Feb. 28, 1967 Filed Feb.
Fel 28, 1957 D. E. HENsHAw ETAI. 3,306,023
PROCESS FOR FORMING TWISTED FIBRE ASSEMBLIES `Filed Feb. 9, 1966 2 Sheets-Sheet 2 United States Patent Otlce 3,306,023 Patented Feb. 28, 1967 orate p Filed Feb. 9, 1966, Ser. No. 526,128 Claims priority, application Australia, Feb. 9, 1965, 54,921/65 5 Claims. (Cl. 57-156) This invention relates to the formation of twisted fibre assemblies and is applicable particularly but not exclusivel1y to the preparation of yarn from staple iibres, for example wool libres.
The specification of our United States Patent No. 2,225,533. discloses the preparation of a yarn by converging a strand which has been twisted so that it has repeated along its length alternating zones of opposite twist with another strand and allowing it to twist around that other strand. Both of the strands, or all of them if there be more than two, may be intermittently twisted and converged with the regions of twist in the strands suitably phased so that, when the strands commence to untwist, they twist around each other and this plying of the strands restrains the twist in each individual strand to result in self-stabilized plied assembly. Such an assembly will hereinafter, for the sake of convenience, be called selftwistthread or, where appropriate, more specifically, a self-twist yarn and the individual components will be called strands A self-twist yarn can be produced at much faster rates than conventional plied yarns. However, simple selftwist yarns have regions of no plying twist which have low abrasion resistance and also constitute zones of weakness in the yarn. The weaving of simple self-twist yarns therefore can lead to yarn breakage problems in the warp. Furthermore the regions of no twist may cause a periodicity effect in the appearance of a fabric woven from -a simple self-twist yarn, particularly if the fabric is woven in a single colour. The appearance of such a fabric may render it unsuitable for some applications.
A weavable self-twist warp yarn can be produced by suitably phasing the twist change-over regions of the individual strands of the yarn as fully described in our above mentioned co-pending applications, but su-ch yarns may still produce fabrics which suier from a periodicity in appearance.
A weavable yarn of satisfactory appearance can be obtained 'by plying together two or more self-twist yarns. However, because of the increased number of strands in a yarn of given size, each individual strand must be relatively iine and this leads to breakage problems when the individual strands are being separately twisted.
It is an object of this invention to provide a process for the production of yarn which can be readily Woven. It is a further object to provide such a -process where-by there may be produced, if desired, a yarn which can be used to produce a single colour fabric of relatively even appearance.
According to the invention there is provided a process for forming a twisted thread fromtwo strands, compri-sing separately twisting the strands so that they each have repeated along their lengths alternating zones of opposite twist separated by twist change-over regions at which there is no twist, converging the strands so that they twist around one another to form a stable thread, and then inserting unidirectional twist into that thread.
Contrary to what might be excepted, the strongest yarn is obtained by applying unidirectional twist not to a selftwist yarn which has -been phased so :as to give maximum strength, but instead to the weaker form of self-twist yarn, i.e. a self-twist yarn in which the twist change-over regions of the individual strands are coincident and the twist zones of the individual strands are completely in phase.
The unidirectional twist may be inserted until the thread has unidirectional plying twist which, however, varies in intensity along the length of the thread.
In order that the invention may be more fully explained; the preparation of a two strand thread by a process according to the invention will now be descri'bed with reference to the accompanying drawings in which:
FIGURE 1 is a diagrammatic representation of a selftwist yarn formed of two intermittently twisted strands with their twist zones of equal length and in phase,
FIGURE 2 is a diagrammatic representation of the configuration taken on by the yarn of FIGURE 1 after a certain amount of unidirectional S-twist has been inserted -into it,
FIGURE 3 is a diagrammatic representation of the configuration taken on by the yarn when even further S- twist is inserted into it, and
FIGURE 4 is a graphic illustration of the manner in which the strength of fa self-twist yarn is increased by the insertion of unidirectional twist into it.
FIGURE 1 illustrates diagrammatically a self-twist yarn consisting of two similar alternately opposite-ly twisted strands 5, 6 which -are plied with their twist zones in phase. This type of yarn may be produced by apparatus of a type which is fully described and illustrated in the specification of the above mentioned United States patent and the yarn is identical to the one illustrated in FIGURE lla of that specification. It is lformed by separately twisting strands 5, 6 so that they each haverepeated along their length alternating zones of opposite twist separated .by twist change-over regions at which there is no twist and then converging strands 5, 6 with like twist zones in phase and with the twist change-over regions coincident. Strands 5, 6 then twist around one another to form the stable yarn shown in the ligure. The yarn has alternating zones A and B of opposite plying twist separated by `short zones C of no plying twist. Throughout zones C there is no twist in either of strands 5, 6, these zones being formed by coinciding twist change-over regions of the strands. Throughout zones A, the individual strands 5, 6 .have Z-twist and the yarn has two-fold or plying S- twist. Throughout zones B, the individual strands 5, 6 have S-twist and the yarn has two-fold Z-twist.
In accordance with this invention unidirectional twist maybe inserted into the yarn of FIGURE 1 until its plying twist is all in the direction of the linserted unidirectional twist. For example, consider that S-twist is added to the yarn. Over zones A in which the individual strands 5, 6 have Z-twist and the yam has two-fold S-twist, the twofold S-twist is reinforced; two-fold S-twist is imparted to the yarn over zones C which originally had no twist; and in zones B, where the individual strands 5, 6 have S- twist and the yarn has two-fold Z-twist, the two-fold twist is removed. A stage is reached at which zones B have no two-fold or plying twist at all. The configuration of the yarn at this stage is shown in FIGURE 2. The twofold S-twist of the yarn over zones A has been reinforced, two-fold S-twist has been inserted into the yarn over zones C and the two-fold Z-twist has been removed from the yarn over zone B so that zones B are now large zones which have no two-fold twist at all. However, strands 5, 6 still have individual S-twist throughout zones B.
If the insertion of the two-fold S-twist is now continued the two-fold S-twist in zones A and C is further reinforced and throughout zones B the strands 5, 6 are plied with two-fold S-twist. The Iinal yarn is shown in FIG- URE 3. It has alternating zones A and B of relatively high intensity two-fold S-twist and relatively low intensity two-fold S-twist which are separated by short zones C of medium intensity two-fold S-twist. Zones C are the ones which in the original stable self-twist yarn had no twist at all and constituted weak zones in that y-arn. Because they have now been strengthened by the insertion of twist therein, the strength of the yarn as a whole is greatly increased. In fact the strength of the yarn increases as soon as the insertion of unidirectional twist is begun. Although in the initial stages of the insertion of the unidirectional twist, zones B are weakened by the removal of two-fold twist, the strands in these Zones have individual twist and the yarn in these zones is therefore stronger than the yarn over Zones C.
The increase of strength of the yarn as unidirectional twist is inserted into it is shown graphically in FIGURE 4, in which the yarn strength is shown on axis OY against the inserted unidirection twist on `the axis OX. In this figure, the line L shows a typical result. However the actual rate of increase of strength will depend on several factors such as the intensity of the twist in the original self-twist yarn and the number of strands in the yarn. For example, a self-tvvist yarn similar to that resulting in curve L but having a greater intensity of self-twist would give the result represented by curve M whereas a selftwist yarn having a smaller intensity of self-twist would give the result shown by curve N. In all cases, however, the strength of the yarn is greatly increased by the insertion of the unidirectional twist.
It has been found that single colour fabrics woven from simple self-twist yarn may show, under unfavourable lighting conditions, visible patterning effects which are unsightly. The reason for this is not fully understood 'but it is thought that the reilective properties of a yarn surface may vary according to whether or not the yarn has two-fold S-twist or two-fold Z-twist. In the case of yarn having unidirectional twist of varying intensity, this objectionable patterning does not occur, or at least does not occur to an extent sufcient to be visible to the naked eye. A fabric woven from a yarn of this type therefore has an even appearance.
It will be appreciated that similar results could be achieved by applying unidirectional two-fold Z-twist to the self-twist yarn rather than S-twist. Furthermoreby stopping the insertion of the unidirectional twist into the yarn at such -a stage that the yarn has alternating Zones of oppositely directed two-fold twist or when alternate zones have no twist at all, it is possible to produce special effects in the resultant fabric. Moreover the self-twist yarn need not be a two strand yarn but could comprise three or more strands. It is, therefore, to be understood that -the invention is in no way limited to the production of a two strand yarn 4as described in detail above 'but includes all modications and adaptations which fall within its spirit and scope.
We claim:
1. A process for forming a twisted thread from at least two strands, comprising the steps of:
(a) separately twisting the strands so that they each have repeated along their lengths alternating Zones of opposite twist separated by twist change-over regions at which there is no twist,
(b) converging the strands so that they twist around one another to form a stable thread, and
(c) inserting unidirectional twist into said sta'ble thread.
2. A process as claimed in claim 1, wherein the strands are converged with like twist zones in phase :and with the twist change-over regions coincident when forming said stable thread.
3. A process `as claimed in claim 1, in which said unidirectional twist is inserted into the stable thread until that thread has unidirectional plying twist which varies in intensity along the length ofthe thread.
4. A process as claimed in claim 2, in which said unidirectional twist is inserted into the stable thread until that thread has unidirectional plying twist which varies in intensity along the length of the thread.
5. A process as claimed in claim 1, in which at least one of the strands is produced from staple fibre.
References Cited by the Examiner UNITED STATES PATENTS 2,203,721 6/1940 Dngley et al. 57-157 2,807,130 9/1957 Trapido et al. 57-77.3 2,936,569 5/1960 Mull 57-140 2,957,302 10/1960 Lenk et al. 5777.3 2,990,671 7/1961V Bunting et al 57-77.3 X 3,041,814 7/ 1962 Held 57--34 3,162,995 12/1964 Corner et al 57-157 3,225,533 12/1965 Henshaw 57-156 X References Cited by the Applicant UNITED STATES PATENTS 3,120,733 2/1964 Breen.
FRANK J. COHEN, Primary Examiner.
D. E. WATKINS, Assistant Examiner.

Claims (1)

1. A PROCESS FOR FORMING A TWISTED THREAD FROM AT LEAST TWO STRANDS, COMPRISING THE STEPS OF: (A) SEPARATELY TWISTING THE STRANDS SO THAT THEY EACH HAVE REPEATED ALONG THEIR LENGTHS ALTERNATING ZONES OF OPPOSITE TWIST SEPARATED BY TWIST CHANGE-OVER REGIONS AT WHICH THERE IS NO TWIST, (B) CONVERGING THE STRANDS SO THAT THEY TWIST AROUND ONE ANOTHER TO FORM A STABLE THREAD, AND (C) INSERTING UNIDIRECTIONAL TWIST INTO SAID STABLE THREAD.
US3306023D Process for forming twisted fibre assemblies Expired - Lifetime US3306023A (en)

Publications (1)

Publication Number Publication Date
US3306023A true US3306023A (en) 1967-02-28

Family

ID=3459012

Family Applications (1)

Application Number Title Priority Date Filing Date
US3306023D Expired - Lifetime US3306023A (en) Process for forming twisted fibre assemblies

Country Status (1)

Country Link
US (1) US3306023A (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3434275A (en) * 1967-04-26 1969-03-25 Stanley Backer Alternate twist yarns and method of forming same
US3509709A (en) * 1967-06-06 1970-05-05 Nippon Rayon Kk Pneumatically bundled yarn
US3537251A (en) * 1967-06-06 1970-11-03 Nippon Rayon Kk Production of mechanically bundled yarns
US3693341A (en) * 1970-04-17 1972-09-26 Hercules Inc Yarn treatment process
US3695019A (en) * 1969-06-17 1972-10-03 James Lappage Method and apparatus for forming yarn
US3999361A (en) * 1974-04-19 1976-12-28 Commonwealth Scientific And Industrial Research Organization Method of and apparatus for forming a multi-ply yarn
US4068459A (en) * 1975-07-22 1978-01-17 Pavel Mikhailovich Movshovich Method of twist-plying a fibrous product
US4162607A (en) * 1977-07-01 1979-07-31 Akzona Incorporated Entangled yarns
US4215642A (en) * 1977-10-25 1980-08-05 Wwg Industries Inc. Variable twist self-twist yarn
US4381426A (en) * 1981-03-23 1983-04-26 Allied Corporation Low crosstalk ribbon cable
US4413469A (en) * 1981-03-23 1983-11-08 Allied Corporation Method of making low crosstalk ribbon cable
WO2012059560A1 (en) 2010-11-03 2012-05-10 Gilbos Nv Process and apparatus for making alternate s/z twist plied braid or joined alternate s/z twist plied yarns
WO2017081536A1 (en) 2015-11-10 2017-05-18 Gilbos N.V. Improved jet and method
WO2017081544A1 (en) 2015-11-10 2017-05-18 Gilbos N.V. Tension compensator
US20200157710A1 (en) * 2018-11-20 2020-05-21 Amrapur Overseas, Inc. Yarn manufacturing
US20200157708A1 (en) * 2018-11-20 2020-05-21 Amrapur Overseas, Inc. Yarn manufacturing
US20210348308A1 (en) * 2020-05-07 2021-11-11 Universal Fibers, Inc. Heathered helix yarns

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2203721A (en) * 1938-07-15 1940-06-11 Celanese Corp Crepe yarn and the manufacture thereof
US2807130A (en) * 1955-11-14 1957-09-24 Kahn & Feldman Inc Apparatus for crimping strands
US2936569A (en) * 1958-04-21 1960-05-17 Sellers Mfg Company Inc Composite stretch yarn and fabric and processes of producing same
US2957302A (en) * 1958-07-05 1960-10-25 Barmag Barmer Maschf Twisting apparatus
US2990671A (en) * 1958-08-01 1961-07-04 Du Pont Multiple vortex pneumatic twister and method of producing alternate twist yarn
US3041814A (en) * 1960-07-07 1962-07-03 Heberlein Patent Corp Apparatus for producing crimped yarn
US3120733A (en) * 1962-07-06 1964-02-11 Du Pont Process of uniting a plurality of yarns into a network structure and the resulting unitary yarn structures
US3162995A (en) * 1961-09-11 1964-12-29 Deering Milliken Res Corp Method of processing monofilament yarn
US3225533A (en) * 1961-10-19 1965-12-28 Commw Scient Ind Res Org Apparatus and process for forming yarns and other twisted assemblies

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2203721A (en) * 1938-07-15 1940-06-11 Celanese Corp Crepe yarn and the manufacture thereof
US2807130A (en) * 1955-11-14 1957-09-24 Kahn & Feldman Inc Apparatus for crimping strands
US2936569A (en) * 1958-04-21 1960-05-17 Sellers Mfg Company Inc Composite stretch yarn and fabric and processes of producing same
US2957302A (en) * 1958-07-05 1960-10-25 Barmag Barmer Maschf Twisting apparatus
US2990671A (en) * 1958-08-01 1961-07-04 Du Pont Multiple vortex pneumatic twister and method of producing alternate twist yarn
US3041814A (en) * 1960-07-07 1962-07-03 Heberlein Patent Corp Apparatus for producing crimped yarn
US3162995A (en) * 1961-09-11 1964-12-29 Deering Milliken Res Corp Method of processing monofilament yarn
US3225533A (en) * 1961-10-19 1965-12-28 Commw Scient Ind Res Org Apparatus and process for forming yarns and other twisted assemblies
US3120733A (en) * 1962-07-06 1964-02-11 Du Pont Process of uniting a plurality of yarns into a network structure and the resulting unitary yarn structures

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3434275A (en) * 1967-04-26 1969-03-25 Stanley Backer Alternate twist yarns and method of forming same
US3509709A (en) * 1967-06-06 1970-05-05 Nippon Rayon Kk Pneumatically bundled yarn
US3537251A (en) * 1967-06-06 1970-11-03 Nippon Rayon Kk Production of mechanically bundled yarns
US3695019A (en) * 1969-06-17 1972-10-03 James Lappage Method and apparatus for forming yarn
US3693341A (en) * 1970-04-17 1972-09-26 Hercules Inc Yarn treatment process
US3999361A (en) * 1974-04-19 1976-12-28 Commonwealth Scientific And Industrial Research Organization Method of and apparatus for forming a multi-ply yarn
US4068459A (en) * 1975-07-22 1978-01-17 Pavel Mikhailovich Movshovich Method of twist-plying a fibrous product
US4162607A (en) * 1977-07-01 1979-07-31 Akzona Incorporated Entangled yarns
US4215642A (en) * 1977-10-25 1980-08-05 Wwg Industries Inc. Variable twist self-twist yarn
US4413469A (en) * 1981-03-23 1983-11-08 Allied Corporation Method of making low crosstalk ribbon cable
US4381426A (en) * 1981-03-23 1983-04-26 Allied Corporation Low crosstalk ribbon cable
WO2012059560A1 (en) 2010-11-03 2012-05-10 Gilbos Nv Process and apparatus for making alternate s/z twist plied braid or joined alternate s/z twist plied yarns
US20130205741A1 (en) * 2010-11-03 2013-08-15 Gilbos N.V. Process and apparatus for making alternate s/z twist plied braid or joined alternate s/z twist plied yarns
WO2017081536A1 (en) 2015-11-10 2017-05-18 Gilbos N.V. Improved jet and method
WO2017081544A1 (en) 2015-11-10 2017-05-18 Gilbos N.V. Tension compensator
US10895024B2 (en) 2015-11-10 2021-01-19 Gilbos N.V. Tension compensator
US11053612B2 (en) 2015-11-10 2021-07-06 Gilbos N.V. Jet and method
US20200157710A1 (en) * 2018-11-20 2020-05-21 Amrapur Overseas, Inc. Yarn manufacturing
US20200157708A1 (en) * 2018-11-20 2020-05-21 Amrapur Overseas, Inc. Yarn manufacturing
US10995430B2 (en) * 2018-11-20 2021-05-04 Amrapur Overseas, Inc. Yarn manufacturing
US20210348308A1 (en) * 2020-05-07 2021-11-11 Universal Fibers, Inc. Heathered helix yarns

Similar Documents

Publication Publication Date Title
US3306023A (en) Process for forming twisted fibre assemblies
US3443370A (en) Twisted thread assemblies
US3468120A (en) Method of producing alternate twist yarn
US3357076A (en) Yarn and fabrics having stretch properties
US2244832A (en) Production of textile threads
US2134022A (en) Production of composite yarns
EP0123479B1 (en) Synthetic yarn and yarn-like structures and a method and apparatus for their production
US3234725A (en) Process for making elastic yarn
US3932986A (en) Method for manufacturing a textured synthetic multifilament yarn having alternately grouped S and Z twists
EP0169570A2 (en) Process for the manufacture of reinforced false twist yarns
JPS5911704B2 (en) Method for manufacturing bundled yarn
US3488939A (en) Twisted thread assemblies
US3069838A (en) Method of manufacturing a highly elastic yarn ply
US2909028A (en) Dual torque yarn and method of making same
US2846840A (en) Superpolyamidic threads and manufacture thereof
US2846839A (en) Snag resistant bulky multi-ply superpolymidic yarn
US3284996A (en) Method of producing crimped yarn
US2821835A (en) Carpet yarn and method of making same
US2057577A (en) Elastic thread
US3025661A (en) Coiled textile strand and method of producing same
US4420927A (en) Process for the manufacture of a fancy yarn
US3835639A (en) Method of making novelty yarn
US2064801A (en) Elastic yarn and method of making the same
US3863683A (en) Tire cord for pneumatic tires and pneumatic tires containing the same
JPS60199947A (en) Production of special bulky yarn