US3303639A - Pneumtic false twister - Google Patents

Pneumtic false twister Download PDF

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Publication number
US3303639A
US3303639A US466159A US46615965A US3303639A US 3303639 A US3303639 A US 3303639A US 466159 A US466159 A US 466159A US 46615965 A US46615965 A US 46615965A US 3303639 A US3303639 A US 3303639A
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US
United States
Prior art keywords
insert
false
twist
yarn
bore
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
US466159A
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English (en)
Inventor
Ernest P Carter
Roger S Otstot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Monsanto Co
Original Assignee
Monsanto Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Monsanto Co filed Critical Monsanto Co
Priority to US466159A priority Critical patent/US3303639A/en
Priority to NL6608414A priority patent/NL6608414A/xx
Priority to GB27269/66A priority patent/GB1146480A/en
Priority to IL25990A priority patent/IL25990A/en
Priority to LU51366D priority patent/LU51366A1/xx
Priority to FR66513A priority patent/FR1526850A/fr
Priority to CH912266A priority patent/CH461697A/fr
Priority to BE683012D priority patent/BE683012A/xx
Application granted granted Critical
Publication of US3303639A publication Critical patent/US3303639A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

Definitions

  • the present invention relates to apparatus for imparting a false twist or coiling action to continuous filaments. More particularly this invention relates to an improved pneumatic false twister.
  • False-twist devices are commonly used in yarn bulking processes, core and sheathcore spinning processes, and production of non-woven structures.
  • the false-twist may be produced by a mechanical or pneumatic type false twister.
  • the pneumatic twisters are preferred over the mechanical twisters in the formation of various networks from continuous filament yarns since the air stream imparts a coiling action to the yarn and forwards it to a collection means where the yarn coils are bonded together to form a non-woven structure.
  • the pneumatic false-twist devices have been composed of air ejectors or aspirators having complicated design features which increase the difficulty of reproducing other units having similar operating performance. Therefore, it is difiicult to reproduce a controlled condition where several of the devices are employed.
  • Another disadvantage with the presently known devices is the high velocities that are required in order to impart a minimum degree of twist to the yarn.
  • Another object of the invention is to provide an improved pneumatic false twisting device having simple design features and controllable operating ei'ficiency.
  • a further object of the invention is to provide a device which forwards yarn under low tension and imparts false twist thereto at a predetermined rate ranging preferentially from a low twist to an ultra-high twist.
  • Still another object of the invention is to provide an improved .pneumatic false twister capable of imparting a high degree of false twist to yarn under a considerable amount of tension.
  • Another object of the invention is to provide an improved pneumatic false-twist device capable of operating at low velocities to achieve low false twist.
  • One embodiment contemplated by the present invention comprises an elongated tubular body member having a hollow insert concentrically disposed in said body member and being characterized by a spiral-helical rib or fin extending around the outer surface of the insert and an inlet passageway through the wall of the body member for introducing a stream of air or other gaseous medium onto the spiral-helical fin which imparts a spiraling motion to the air as it passes over the fin on the insert to further impart a twisting action to yarn passing concurrently through the hollow insert.
  • FIGURE 1 is a side elevation of a preferred embodiment of the invention, partly in cross-section, to show the internal passageways of the device.
  • FIGURE 2 is a crosssectional view of the device shown in FIGURE 1 at 2-2.
  • FIGURE 3 is a cross-sectional view of another preferred embodiment of the invention wherein the air stream enters the body member intermediate the longitudinal axis thereof and is divided to flow in opposite directions.
  • FIGURE 1 there is shown a tubular member 10 which is designed to have a length substantially greater than the inside diameter.
  • the member '10 has a counter-bore at one end to provide an annular shoulder 12 for accommodating an insert 14 disposed concentrically therein and supported by an enlarged disclike portion 16 which is secured against the shoulder 12.
  • the insert extends through a major portion of the tubular member 10, but terminates at a point from the end opposite from the support flange 16 for reasons that will be explained later herein.
  • a spiral-helical rib 18 circumscribes the outer surface of insert 14 over the entire length thereof.
  • the apex of the rib or fin 18 generally extends to within close proximity to the inside wall 20 of tubular member 10. It should be apparent however that the distance will be determined by the geometrical configuration of the fin 18 and its overall length, in conjunction with the pre ferred operating conditions to be explained hereafter. Thus, it is to be understood also that the depth, shape, and pitch of the fin 18 may be varied to give a wide range of twisting action whereby control of the twisting action can be attained at a predetermined air flow.
  • a passageway 22 extends throughout the longitudinal centerline of the insert 14 and support flange 16.
  • the diameter of the passageway 22 is generally dimensioned to accommodate a continuous filament of the size normally used for fashioning non-woven structures.
  • Positioned near the end of tubular member 10 which supports insert 14 is an inlet passageway 24 and a connecting conduit 26 for introducing a stream of air or some other gaseous medium into the bore of tubular member 10 from a source, not shown.
  • a filament is threaded through passageway 22.
  • a gaseous medium such as air is introduced at inlet 24 and directed upon rib 18 which channels the medium in a coherent stream along the spiral-helical path to the end of insert 14 where the stream leaves the surface thereof with a spiraling action which contacts the filament and imparts false twist thereto.
  • a suction is created at the yarn inlet 28 and thereby forwards the filament through the device.
  • the amount of false-twist and magnitude of force imposed upon the yarn may be controlled by either regulating the amount of air or changing the surface configuration of the insert 14 and its relationship with the inside wall 20 of tubular member 10. For example, when the spiral-helical fin 18 is in close proximity with the wall 20 an air stream having a low velocity will attain a spiraling motion as the stream advances to the end of insert 14 where the filament is entrained by a coherent stream of air which imposes a low degree of false twist and forwarding action on said filament.
  • FIGURE 3 another embodiment of the invention as shown in FIGURE 3 may be employed wherein a tubular member 30 having hollow insert 32 disposed therein is provided with an inlet 34 at midpoint between the ends thereof.
  • the surface of insert 32 is provided with spiralhelical ribs 36 which are contiguous with the inside wall 38 of tubular member 30.
  • a divider plate 40 is located opposite inlet 34 between insert 32 and inside wall 38 3 for dividing a source of air introduced through inlet 34.
  • the ribs 36 and 37 circumscribe insert 32 in opposite directions to produce false twist on a filament advanced through passageway 42 at each end of tubular member 30 and thus impose an increased amount of twisting action on the yarn.
  • Apparatus for imparting false twist to a continuous strand comprising:
  • Apparatus for imparting false twist to a continuous strand comprising:
  • An improved pneumatic false-twist device comprising:
  • An improved pneumatic false-twist device for imparting predetermined directional forces to a continuous strand, comprising:
  • An improved pneumatic false-twist device for imparting a high degree of false twist to a continuous strand, comprising:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US466159A 1965-06-23 1965-06-23 Pneumtic false twister Expired - Lifetime US3303639A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US466159A US3303639A (en) 1965-06-23 1965-06-23 Pneumtic false twister
NL6608414A NL6608414A (US07816562-20101019-C00012.png) 1965-06-23 1966-06-16
GB27269/66A GB1146480A (en) 1965-06-23 1966-06-17 Pneumatic false twister
IL25990A IL25990A (en) 1965-06-23 1966-06-19 Pneumatic device for simulated weaving
LU51366D LU51366A1 (US07816562-20101019-C00012.png) 1965-06-23 1966-06-20
FR66513A FR1526850A (fr) 1965-06-23 1966-06-22 Appareil de fausse torsion
CH912266A CH461697A (fr) 1965-06-23 1966-06-23 Appareil pour la fausse torsion d'un fil ou d'un filament continu
BE683012D BE683012A (US07816562-20101019-C00012.png) 1965-06-23 1966-06-23

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US466159A US3303639A (en) 1965-06-23 1965-06-23 Pneumtic false twister

Publications (1)

Publication Number Publication Date
US3303639A true US3303639A (en) 1967-02-14

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ID=23850739

Family Applications (1)

Application Number Title Priority Date Filing Date
US466159A Expired - Lifetime US3303639A (en) 1965-06-23 1965-06-23 Pneumtic false twister

Country Status (7)

Country Link
US (1) US3303639A (US07816562-20101019-C00012.png)
BE (1) BE683012A (US07816562-20101019-C00012.png)
CH (1) CH461697A (US07816562-20101019-C00012.png)
GB (1) GB1146480A (US07816562-20101019-C00012.png)
IL (1) IL25990A (US07816562-20101019-C00012.png)
LU (1) LU51366A1 (US07816562-20101019-C00012.png)
NL (1) NL6608414A (US07816562-20101019-C00012.png)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3424359A (en) * 1967-07-17 1969-01-28 Leesona Corp Yarn handling apparatus
US3445995A (en) * 1966-12-19 1969-05-27 Leesona Corp Strand twisting apparatus
US3451207A (en) * 1965-10-27 1969-06-24 Wool Ind Res Assoc Device for handling an end of yarn or roving
US3702055A (en) * 1968-08-14 1972-11-07 Mitsubishi Rayon Co Method for manufacturing false twisted threads from thermoplastic resin tapes
US3742692A (en) * 1971-06-01 1973-07-03 Leesona Corp Apparatus and method for false twisting yarn
US5775079A (en) * 1997-04-21 1998-07-07 American Linc Corporation Apparatus for imparting virtual twist to strand material and method of imparting same

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2773282A (en) * 1950-01-17 1956-12-11 Backer Stanley Method of and apparatus for spinning yarns
US2783609A (en) * 1951-12-14 1957-03-05 Du Pont Bulky continuous filament yarn
FR1137609A (fr) * 1954-10-12 1957-05-31 Perfectionnements apportés aux dispositifs pour réaliser un étirage poussé de mèches à filer composées de fibres textiles cardées ou peignées, par l'application d'une fausse torsion
GB787285A (en) * 1955-07-21 1957-12-04 Scragg & Sons Improvements in or relating to spinners for textile machines
US2924000A (en) * 1960-02-09 Bulking yarn
US2990671A (en) * 1958-08-01 1961-07-04 Du Pont Multiple vortex pneumatic twister and method of producing alternate twist yarn
US3022566A (en) * 1958-02-11 1962-02-27 Du Pont False twisted yarn beam
US3204396A (en) * 1961-08-21 1965-09-07 Us Rubber Co Method for texturing thermoplastic yarn and apparatus
US3217482A (en) * 1963-08-30 1965-11-16 Monsanto Co Apparatus for texturizing yarn

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924000A (en) * 1960-02-09 Bulking yarn
US2773282A (en) * 1950-01-17 1956-12-11 Backer Stanley Method of and apparatus for spinning yarns
US2783609A (en) * 1951-12-14 1957-03-05 Du Pont Bulky continuous filament yarn
FR1137609A (fr) * 1954-10-12 1957-05-31 Perfectionnements apportés aux dispositifs pour réaliser un étirage poussé de mèches à filer composées de fibres textiles cardées ou peignées, par l'application d'une fausse torsion
GB787285A (en) * 1955-07-21 1957-12-04 Scragg & Sons Improvements in or relating to spinners for textile machines
US3022566A (en) * 1958-02-11 1962-02-27 Du Pont False twisted yarn beam
US2990671A (en) * 1958-08-01 1961-07-04 Du Pont Multiple vortex pneumatic twister and method of producing alternate twist yarn
US3204396A (en) * 1961-08-21 1965-09-07 Us Rubber Co Method for texturing thermoplastic yarn and apparatus
US3217482A (en) * 1963-08-30 1965-11-16 Monsanto Co Apparatus for texturizing yarn

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451207A (en) * 1965-10-27 1969-06-24 Wool Ind Res Assoc Device for handling an end of yarn or roving
US3445995A (en) * 1966-12-19 1969-05-27 Leesona Corp Strand twisting apparatus
US3424359A (en) * 1967-07-17 1969-01-28 Leesona Corp Yarn handling apparatus
US3702055A (en) * 1968-08-14 1972-11-07 Mitsubishi Rayon Co Method for manufacturing false twisted threads from thermoplastic resin tapes
US3742692A (en) * 1971-06-01 1973-07-03 Leesona Corp Apparatus and method for false twisting yarn
US5775079A (en) * 1997-04-21 1998-07-07 American Linc Corporation Apparatus for imparting virtual twist to strand material and method of imparting same

Also Published As

Publication number Publication date
GB1146480A (en) 1969-03-26
CH461697A (fr) 1968-08-31
IL25990A (en) 1970-02-19
LU51366A1 (US07816562-20101019-C00012.png) 1966-12-20
NL6608414A (US07816562-20101019-C00012.png) 1966-12-27
BE683012A (US07816562-20101019-C00012.png) 1966-12-23

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