US3334478A - Manufacture of elastic yarns - Google Patents

Manufacture of elastic yarns Download PDF

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Publication number
US3334478A
US3334478A US449439A US44943965A US3334478A US 3334478 A US3334478 A US 3334478A US 449439 A US449439 A US 449439A US 44943965 A US44943965 A US 44943965A US 3334478 A US3334478 A US 3334478A
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United States
Prior art keywords
filament
rolls
elastic
pair
rovings
Prior art date
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Expired - Lifetime
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US449439A
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English (en)
Inventor
Milne Percival Norman
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Chemstrand Ltd
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Chemstrand Ltd
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Filing date
Publication date
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Publication of US3334478A publication Critical patent/US3334478A/en
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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
    • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
    • D02G3/324—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic using a drawing frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/02—Rotary devices, e.g. with helical forwarding surfaces
    • B65H51/04—Rollers, pulleys, capstans, or intermeshing rotary elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/02—Rotary devices, e.g. with helical forwarding surfaces
    • B65H51/04—Rollers, pulleys, capstans, or intermeshing rotary elements
    • B65H51/06—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate singly
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • FIGS. 1 A first figure.
  • a known method of spinning elastic high-bulk textile yarn consists in passing a straight elastic filament through a tensioning device, combining the filament with a nonelastic roving and twisting the filament and the roving on a spinning frame. Whilst undergoing such treatment, the elastic filament is maintained in a stretched condition. When the elastic filament is allowed to contract, the sheath fibres bulge outwardly to provide a high-bulk yarn.
  • a disadvantage of this and other known methods of producing high'bulk elastic yarns is that they lack infinite control of the elastic filament so that non-uniform oflF- winding tensions of the elastic filament and drafting of the non-elastic roving occurs with the result that the composite yarn has imparted thereto irregularities in the elongation and other physical properties of the yarn which is undesirable.
  • a method of spinning an elastic high-bulk yarn comprising the steps of providing an elastic filament wound under tension onto a package, causing said package to rotate at a predetermined speed, unwinding said filament from said package at a predetermined linear speed, feeding said filament onto a positively driven pulley to cause said filament to travel in an undulating path and to restrain it against slippage, advancing said filament under uniform tension through a drafting zone, drafting one or more rovings of inelastic filaments, gathering said elastic filament and said drafted rovings in a final drafting zone and thereafter twisting said rovings about said elastic filament to form a sheath thereto.
  • FIGURE 1 is a diagrammatic representation of an apparatus for carrying out the invention.
  • FIGURE 2 is a part-sectional side view of a pu ley employed in the apparatus diagrammatically illustrated in FIGURE 1.
  • FIGURE 3 is a front elevation of one of the parts from which the pulley illustrated in FIGURE 2 is constructed.
  • FIGURE 4 is a sectional view taken on the line A-A of FIGURE 3, and
  • FIGURE 5 is a front elevation looking in the direction of the arrow B in FIGURE 2.
  • a cylindrical package 1 has wound thereon a continuous elastic filament 2.
  • the package 1 is disposed between a pair of drive rolls 3, suitable brackets (not shown) being provided to hold the package 1 between the drive rolls 3.
  • the drive rolls 3 are adapted to be positively driven through suitable gearing and serve to unwind the elastic filament 2 from the package 1 at a predetermined linear speed.
  • the elastic filament 2 is fed to a V-pulley 4 mounted on a shaft 5, the rotational speed of which can be varied so as to afford a predetermined amount of elongation to the elastic fila- 3,334,478 Patented Aug. 8, 1967.
  • ment 2 as it is fed to the nip of a pair of final draft rolls 6 and 7.
  • the elastic filament 2 is fed from the pulley 4 between the nip of a pair of rolls 8 and 9.
  • Packages 10 and 11 supply rovings of inelastic staple fibres 12 and 13 to a conventional drafting system comprising pairs of rolls 14 and 15, as illustrated, or a series of drafting aprons or a combination of drafting rolls and aprons.
  • the drafted inelastic staple fibre rovings 12 and 13 together with the elastic filament 2 are passed between the final draft rolls 6 and 7 and thence through a guide 16 to a conventional twist means (not shown) whereby the rovings 12 and 13 are wound around the elastic filament 2 to form a sheath.
  • the composite yarn is then wound onto a bobbin 17.
  • Rolls 8 and 9 are driven at a speed which is correlated with the speed of the rolls 6 and 7 to provide the desired amount of elongation of the filament 2 in the span between the rolls 8, 9 and 6, 7.
  • the rotational speed of the pulley 4 is correlated with the rotational speed of the rolls 8 and 9 to provide the desired amount of elongation of the elastic filament 2 in the span between the pulley 4 and the rolls 8 and 9.
  • the pulley 4 in effect provides a pretensioning of the elastic filament 2 to insure that this filament passes between the rolls 8 and 9 at a predetermined constant tension. Without the pulley 4, the elastic filament 2 would pass between the rolls 8 and 9 under a tension which is in part a function of the tension with which the elastic filament is wound onto the bobbin 1.
  • the pulley 4 comprises a pair of dished plates 18 each of which is formed with a plurality of equidistantly spaced radial tongues 19 which are inclined outwardly.
  • the plates 18 each have a central aperture 20 for the reception of a boss 21 whereby the pulley is mounted on the shaft 5.
  • the plates 18 are assembled so that the tongues on one plate interengage the gaps between the tongues on the other plate, the plates being secured in the assembled position through the medium of a shoulder 22 On the boss 21, the outer end 23 of which is punched over so that the plates are held in firm engagement with each other.
  • a hoop 24 is press-fitted onto the outer edge of each plate so as to provide a smooth finish thereto.
  • the periphery of the base of the pulley groove will provide an undulating, e.g. corrugated, surface.
  • the elastic filament When the elastic filament is in engagement with the pulley groove, it will follow an undulating path whereby a restraining action will be exerted on the filament and slippage thereof will be prevented, thus ensuring that the filament is fed uniformly to the final drafting zone and that the composite yarn will be free from irregularities in the elongation of the yarn.
  • the textile fibre from which the sheath is formed can be any natural fibre in staple or continuous filament form, such as cotton, or wool, or any synthetic fibre, such as, for example, nylon, rayon, polyacrylonitrile, or polyethylene terephthalate.
  • the elastic filament constituting the core of the yarn is preferably formed from a long chain synthetic polymer composed of at least percent of a segmented polyurethane of the kind known as Spandex.
  • the present invention enables an elastic filament to be introduced to a drafting zone under predetermined and positively controlled conditions of elongation and modulus so as to produce a uniformand consistent yarn having the desired elastic properties.
  • the controlled conditions can be varied from zero up to the ultImate stretch limit of the elastic filament.
  • a method of spinning an elastic high-bulk yarn comprising the steps of providing an elastic filament wound under tension on a package, causing said package to rotate at a predetermined speed, unwinding said filament from said package at a predetermined linear speed, feeding said filament onto a positively driven pulley to cause said filament to travel in an undulating path and to restrain it against slippage, advancing the filament from the pulley through a pretensioning zone to a final drafting zone, advancing said filament under uniform tension through the final drafting zone, drafting one or more rovings of inelastic filaments, gathering said elastic filament and said drafted rovings in the final drafting zone and thereafter twisting said rovings about said filament to form a sheath thereto.
  • Apparatus for spinning an elastic high-bulk yarn comprising a package wound with elastic filament and adapted to be rotatably driven to unwind said filament therefrom at a predetermined linear speed, 'a rotatably driven V-pulley adapted to receive said filament and to advance it without slippage through a pretensioning zone to the nip of a first pair of draft rollers, at least one package having Wound thereon rovings of inelastic filaments, a drafting system for said inelastic rovings unwound from said package or packages, a second pair of draft rolls for receiving the elastic filament from said first pair of draft rolls, said elastic filament and said rovings being passed together between said second pair of draft rolls, a guide for said drafted elastic filament and rovings and means for twisting said rovings around sa'd elastic filament, the speeds of the pulley and the first and second pairs of draft rolls being correlated with each other in such a manner that the elastic filament is pretensioned between the pulle
  • said pulley comprises a pair of dished plates each formed with a plurality of equidistantly spaced outwardly inclined radial tongues and a central aperture, said plates being so assembled that the tongues on one plate interengage the gaps between the tongues on the other plate, whereby the periphery of the base of the pulley V-groove will have an undulating elastic filament-contacting surface to restrain said filament against slippage;
  • Apparatus according to claim 5 wherein a hoop is located on and secured to the outer edge of each of said plates to provide a smooth finish thereto.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US449439A 1964-04-21 1965-04-20 Manufacture of elastic yarns Expired - Lifetime US3334478A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB16511/64A GB1067027A (en) 1964-04-21 1964-04-21 Improvements in or relating to the manufacture of elastic yarns

Publications (1)

Publication Number Publication Date
US3334478A true US3334478A (en) 1967-08-08

Family

ID=10078648

Family Applications (1)

Application Number Title Priority Date Filing Date
US449439A Expired - Lifetime US3334478A (en) 1964-04-21 1965-04-20 Manufacture of elastic yarns

Country Status (8)

Country Link
US (1) US3334478A (de)
BE (1) BE662836A (de)
CH (1) CH436061A (de)
DE (1) DE1510569A1 (de)
GB (1) GB1067027A (de)
IL (1) IL23333A (de)
LU (1) LU48431A1 (de)
NL (1) NL6504728A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772869A (en) * 1970-02-27 1973-11-20 Zinser Textilmaschinen Gmbh Twist stopping device
US3921382A (en) * 1970-05-18 1975-11-25 Toray Industries Method of making a covered elastic yarn
US4614081A (en) * 1984-10-11 1986-09-30 Youngnam Textile Co., Ltd. Method for manufacturing a cotton yarn
US20160024692A1 (en) * 2013-09-09 2016-01-28 Central Fabrics Limited Core spun elastic composite yarn and woven fabric thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2074199A (en) * 1936-10-09 1937-03-16 Howard P Arnold Feed wheel
US2210884A (en) * 1939-02-11 1940-08-13 Us Rubber Co Method of making elastic yarn
US3243950A (en) * 1963-11-27 1966-04-05 Monsanto Co Method of making elastic core yarns

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2074199A (en) * 1936-10-09 1937-03-16 Howard P Arnold Feed wheel
US2210884A (en) * 1939-02-11 1940-08-13 Us Rubber Co Method of making elastic yarn
US3243950A (en) * 1963-11-27 1966-04-05 Monsanto Co Method of making elastic core yarns

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772869A (en) * 1970-02-27 1973-11-20 Zinser Textilmaschinen Gmbh Twist stopping device
US3921382A (en) * 1970-05-18 1975-11-25 Toray Industries Method of making a covered elastic yarn
US4614081A (en) * 1984-10-11 1986-09-30 Youngnam Textile Co., Ltd. Method for manufacturing a cotton yarn
US20160024692A1 (en) * 2013-09-09 2016-01-28 Central Fabrics Limited Core spun elastic composite yarn and woven fabric thereof

Also Published As

Publication number Publication date
CH436061A (fr) 1967-05-15
BE662836A (de)
LU48431A1 (de) 1965-10-20
NL6504728A (de) 1965-10-22
GB1067027A (en) 1967-04-26
IL23333A (en) 1968-12-26
DE1510569A1 (de) 1970-07-23

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