US3445995A - Strand twisting apparatus - Google Patents

Strand twisting apparatus Download PDF

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Publication number
US3445995A
US3445995A US602798A US3445995DA US3445995A US 3445995 A US3445995 A US 3445995A US 602798 A US602798 A US 602798A US 3445995D A US3445995D A US 3445995DA US 3445995 A US3445995 A US 3445995A
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United States
Prior art keywords
fibers
apertures
yarn
strand
chamber
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Expired - Lifetime
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US602798A
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English (en)
Inventor
Charles C Bell
Kurt W Niederer
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Leesona Corp
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Leesona Corp
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Assigned to JOHN BROWN INDUSTRIES LTD., A CORP. OF DE. reassignment JOHN BROWN INDUSTRIES LTD., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: LEESONA CORPORATION; 333 STRAWBERRY FIELD RD., WARWICK, RI. A CORP. OF MA.
Assigned to LEESONA CORPORATION reassignment LEESONA CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE 3-31-81 STATE OF DELAWARE Assignors: JOHN BROWN INDUSTRIES LTD.
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means

Definitions

  • This invention relates generally to strand twisting apparatus and more particularly to a unique aspirating system for manipulating fibrous yarn.
  • roving which is a loose asemblage of subtantially parallel fibers formed into a single strand with very little twist, is drawn through a series of drafting rolls and thereupon mechanically twisted and wound onto a bobbin.
  • the twisting and winding operations are performed simultaneously by means of a traveller which rides around the upper flange of a ring encircling the bobbin. The traveller engages the yarn to hold it clear of the periphery of the bobbin and distributes the yarn along the length of the take-up bobbin as a suitable mechanism operates to reciprocate the ring along substantially the length of the take-up bobbin.
  • Twist is imparted to the roving by the action of the traveller immediately as it issues forth from the last pair of drafting rolls and becomes yarn.
  • the roving is extremely flimsy and lacks any appreciable tensile strength requiring that it be handled carefully and adroitly.
  • the yarn parts downstream of the delivery pair of drafting rolls, thereupon necessitating the threading up of the fibers issuing from the drafting rolls with the yarn on the bobbin.
  • a feature of the present invention is means according to which the drafted but untwisted fibers are engaged or snared at the nip of the delivery pair of drafting rolls for removal from the influence of the spinning frame waste disposal system and conveyance into proximity with the spindle for threading thereon while twisting the fibers into yarn and without disturbing the delicate structure of the strand, thereby obviating the need for highly skilled operators.
  • an aspirator system including a vortex nozzle which is advanced until its suction orifice is in close proximity to the nip of the delivery pair of drafting rolls to attract the strand into the suction orifice.
  • the vortical flow of air within the nozzle imparts to the strand a twist to sufliciently enhance the tensile strength as will permit its manipulation while assuring its continued integrity.
  • the nozzle is thereafter retracted from the drafting rolls preferably at a rate which is substantially the same as the rate of fiber strand delivery from the rolls, drawing the free end of yarn therewith to a position Whereat it can be conveniently engaged by the traveller and threaded to a bare take-up bobbin or joined to the free end of yarn extending from a partially wound take-up bobbin. As the nozzle is retracted, it continuously imparts twist to the strand to produce yarn.
  • the twist imparted by the vortex nozzle can be in the direction in which the yarn is twisted in the normal operation of the machine. Hence, the length of yarn which is pieced-up to the supply from the drafting rolls is of acceptable quality for further processing along with the remainder of the yarn on the take-up bobbin.
  • Another object of the invention is to provide an aspirator operable to withdrawn a fibrous strand from the nip of a pair of opposed rolls.
  • a further object of the invention is to provide a twisting device operable to withdraw a strand of fibers longitudinally therethrough, twisting the fibers as they advance.
  • Yet another object of the invention is the provision of a device having a source of pressurized fluid, a strand receiving passageway extending therethrough and first and second series of apertures, said first and second series of apertures connecting said source to said passageway.
  • Another object of the present invention is to provide an aspirator operable via a suction system for simutaneously twisting and withdrawing fibers issuing from the drafting system of a spinning machine.
  • FIG. 1 is an elevational view of the invention
  • FIG. 2 is a view taken along lines 22 of FIG. 1;
  • FIG. 3 is a perspective view illustrated in operation with the drafting system of a spinning frame, certain parts of the nozzle being broken away for clarity;
  • FIG. 4 is a section taken along lines 4-4 of FIG. 2, and
  • FIG. 5 is an elevational view of a modified form of the invention.
  • the aspirator is generally indicated at 10 and is seen to include basically a housing 12, a nozzle cap 14, and an internal tubular element 16.
  • Housing 12 is threaded at one end as indicated by numeral 18 and cap 14 is internally threaded for tight mating engagement therewith.
  • the opposite end of housing 12 is provided with a yarn exhaust opening 20.
  • the nose portion of cap 14 is flattened and flared outwardly as seen in FIG. 2 to provide an elongated strand receiving slot 24 extending substantially the width thereof.
  • a short hole 25 (see FIG. 2) is also formed in the nozzle cap 14 and serves as a continuation of slot 24 extending through wall 26.
  • the tubular element 16 is positioned within a chamber 27 formed in the housing 12 and is supported at one end upon an annular shoulder 28 defining a portion of said chamber which is reduced in diameter from that portion into which said element has been received. Element 16 is prevented from axial movement within chamber 27 by reason of wall 26 of cap 14 such that with cap 14 snugly engaged with housing 12, element 16 is firmly seated on shoulder 28.
  • the periphery of element 16 is reduced in diameter as at 30 to define an annular manifold 32 between said element and the inner wall of housing 12.
  • a suitable fluid inlet duct 34 communicates with manifold 32 and is threadedly received through a port 36 in the sidewall of housing 12 and securely fastened thereto as by a nut 37.
  • a longitudinal strand receiving chamber or bore 38 extending through element 16 is of substantially constant diameter at 40 but flared outwardly at 42 at the exhaust end of the nozzle 10.
  • a first set of apertures 44 pierced through element 16 serve to connect manifold 32 with the longitudinal bore '38 and intersect tangentially with the internal surface of bore 38, the axes of said apertures preferably being in a plane normal to the axis of said bore.
  • Apertures 44 are desirably located proximate to fish tail slot 24.
  • the distance between apertures 44 and the outer terminus of slot 24 should be a distance somewhat less than the length of the individual fibers being twisted, see FIG. 3.
  • the fibers F issuing from the drafting rolls are able to continually twist on each other in successive :fashion so that the roving continues to elongate as an integral yarn strand Y and the individual fibers are not able to separate from each other.
  • a second set of apertures 48 which project inwardly and rearwardly through element 16 also ser ve to connect manifold 32 with the longitudinal bore 38.
  • Apertures 48 intersect with bore 38 a considerable distance downstream from apertures 44, as best seen in FIG. 2.
  • One or more of each of the apertures 44, 48 may be employed in each set thereof, the exact number of each of the apertures 44, 48 being a matter of design preference. However, it is desirable if two or more apertures are employed in a set, that they intersect with the internal surface of said bore at substantially equal angularly spaced intervals thereabout for their maximum efficiency.
  • nozzle is seen operatively positioned in the nip of a delivery pair of drafting rolls 50 and 52 for receiving fibers issuing from the drafting rolls.
  • shape and size nozzle cap 14 are used to good advantage whereby the cap has been flattened to permit its closest possible positioning to the nip of the drafting rolls 50 and 52 in order to pick up the fibers as soon as they issue forth.
  • the fibers are held in an integral bundle.
  • the width of the nozzle cap 14 assures that it will be in the path of the advancing strand without regard to the exact location of the strand as the strand traverses back and forth in a limited zone between the rolls in the known manner.
  • Inlet tube 34 leads to a sounce of fluid under pressure such as compressed air (not shown).
  • fluid under pressure such as compressed air (not shown).
  • a vortical fluid path causing a rotating or spinning condition is created within the bore proximate to fishtail slot 24.
  • the fluid under pressure flowing through apertures 48 sets up a zone of negative pressure in the bore 38 upstream of their intersection with the internal surface thereof.
  • apertures 44 be located as close to fish tail slot 24 to prevent any tendency ofthe strand to disintegrate as it advances beyond the drafting rolls 50 and 52 but before it reaches the influence of said apertures.
  • he strand now possesses sufiicient tensile strength 'to' permit its reasonable manipulation" in the course of further operations as it is discharged through exhaust opening 20.
  • FIGS. 14 A brief summary of the operation of the embodiment shown in FIGS. 14 will next be presented; Assuming that fibers issuing from drafting rolls 50, 52 have, say, become separated from their usual wind-up cop or bobbin the aspirator of the present invention is presented to the nip between the drafting rolls. This presentation may be achieved manually or by suitable mechanism therefor.
  • the elongated slot 24 of nozzle cap 14 is aligned with the nip pressurized fluid such as compressed air is entering manifold 32 via tube 34.
  • the compressed air flows through apertures 44 setting up vortical air currents within bore 38 and also fiows through apertures 48 discharging air therethrough toward exhaust opening 20.
  • the yarn Y As the yarn Y is formed, i.e., the fibers F are twisted, in the operative zone of apertures 44, the yarn Y flows aft of bore 38 exiting through exhausting opening 20.
  • the twist generated by the vortex with bore 38 runs back to the nip, thereby continually imparting twist to the fibers ⁇ F issuing from the drafting system to produce yarn Y. It will be apparent that the direction of twist imparted to the fibers F will be controlled by the positioning of apertures 44.
  • the movement of aspirator 10 away from drafting rolls 50, 52 is correlated to be equal to the rate at which the fibers iF issue forth, simply to preclude breaking the yarn Y between the drafting system and aspirator, or on the other hand, to prevent developing undersirable length in the yarn Y as it emaates from the exhaust exit 20 while the aspirator is being moved toward the takeup cop or bobbin.
  • FIG. 5 there is illustrated a modified embodiment of the invention.
  • This modification utilizes a central suction source 60 which is connected to the exhaust opening 20 of aspirator 10 through a tube 62 and a suitable fitting 64 secured in the exhaust opening.
  • the aspirator per se is substantially identical to that described earlier in connection with FIGS. 1-4 and in keeping therewith like reference numerals have been applied to identify like parts in both embodiments. It will be observed however that in the instant embodiment the rearwardly projecting apertures are absent.
  • the inlet tube 34' of the embodiment of IFIG. 5 is not connected to a positive pressure source but, rather, is simply an air intake means by which ambient air is drawn through the aspirator.
  • the suction source 60 is operated to draw ambient air through inlet tube 34, the air being pulled through manifold 32, apertures 44 and longitudinal bore 38.
  • the fibers issuing from drafting rolls 50, 52 are drawn through slot 24, through bore 38, and partially into tube 62.
  • the apertures 44 are positioned tangent to bore 38 in exactly the same manner as described for the embodiment of FIGS. 1-4, the air pulled through these apertures set up vortical currents operable to twist the fibers into yarn.
  • the length of at least the majority of the fibers being twisted should exceed the distance between the nip of the drafting system and apertures 44.
  • the aspirator of FIG. 5 may be moved away from a drafting system, desirably at a speed correlated with the rate of issuance of fibers from the drafting system, in the same manner as described with the earlier embodiment once the fibers are engaged therewith.
  • a device for twisting together a plurality of fibers advancing from a supply source to form a continuous yarn strand comprising, a chamber having openings through first and second ends thereof for the reception of said advancing fibers, operative means, guide means controlling said operative means for inducting the fibers into said chamber through said first end, and further means for presenting said operative means tangentially into said chamber to communicate with and thereby twist the fibers into yarn.
  • said operative means includes a vacuum system connected into said chamber through said second end.
  • said operative means includes a source of pressurized fluid
  • said further means includes orifice means disposed tangentially to the interior wall of said chamber for the admittance of said fluid into said chamber.
  • said guide means includes aperture means extending into said chamber in a path inclined toward said second end to deliver said pressurized fluid into said chamber directionally toward the second and end thereof and thereby induce said fibers into said chamber.
  • a device as set forth in claim 5 including a housing surrounding said aperture means and said orifice means, said housing having a clearance portion adjacent said aperture means and orifice means to provide a manifold connected to both of said means, and a connector joined with said manifold for directing said pressurized fluid into said manifold for passage to the aperture means and orifice means.
  • aperture means and orifice means each include a plurality of ports intersecting with said chamber at equally spaced intervals therearound.
  • a device as set forth in claim 5 including a nozzle positioned at the first end of said chamber, said nozzle having an elongated slot at the forward end thereof communicating with said chamber.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US602798A 1966-12-19 1966-12-19 Strand twisting apparatus Expired - Lifetime US3445995A (en)

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Application Number Priority Date Filing Date Title
US60279866A 1966-12-19 1966-12-19

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US3445995A true US3445995A (en) 1969-05-27

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Application Number Title Priority Date Filing Date
US602798A Expired - Lifetime US3445995A (en) 1966-12-19 1966-12-19 Strand twisting apparatus

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US (1) US3445995A (de)
CH (1) CH514003A (de)
DE (1) DE1685892A1 (de)
FR (1) FR1561196A (de)
GB (1) GB1209152A (de)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3577721A (en) * 1969-02-12 1971-05-04 Phillips Fibers Corp Yarn string-up device
US3577720A (en) * 1968-12-18 1971-05-04 Natan Albertovich Zax Device for twisting yarn
US3593511A (en) * 1969-02-18 1971-07-20 Electrospin Corp Twisting head for textile machine
US3650103A (en) * 1969-11-10 1972-03-21 Uniroyal Inc Process and apparatus for texturizing yarn
US3699759A (en) * 1967-03-23 1972-10-24 Michel Serge Maxime Lefebvre Apparatus for converting textile threads
US3732684A (en) * 1971-02-23 1973-05-15 Du Pont Product and process
US3750922A (en) * 1971-12-30 1973-08-07 Celanese Corp Aspirator
US3782617A (en) * 1971-06-18 1974-01-01 Luwa Ag Apparatus for withdrawing rapidly moving yarn material
US4107911A (en) * 1976-06-18 1978-08-22 Murata Kikai Kabushiki Kaisha Pneumatic spinning apparatus
US4141121A (en) * 1976-12-13 1979-02-27 Glen Raven Mills, Inc. Apparatus for producing fluid jet teased yarns from short/medium staple multifiber spun yarns
US4476672A (en) * 1981-12-15 1984-10-16 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Air nozzle for fasciated yarn spinning
US4631912A (en) * 1985-05-09 1986-12-30 Burlington Industries, Inc. Initial threading for vacuum spinning
US5119623A (en) * 1989-08-24 1992-06-09 Fritz And Hans Stahlecker False-twisting nozzle for pneumatic false-twist spinning

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2552000A1 (de) * 1975-11-20 1977-06-02 Konrad Goetzfried Gegenlaeufiges spinnverfahren und vorrichtung
DE3034909C2 (de) * 1980-04-16 1985-01-24 Ivanovskij tekstil'nyj institut imeni M.V. Frunze, Ivanovo Vorrichtung zum maschinellen Rückführen und Andrehen eines gebrochenen Garns auf Spinnmaschinen
BG33370A1 (en) * 1981-07-22 1983-02-15 Dimitrov Method and apparatus for obtaining of nontwisted yarns from connected by sticking separate fibers
US4457130A (en) * 1981-10-13 1984-07-03 Murata Kikai Kabushiki Kaisha Air spinning nozzle unit
JPS58115125A (ja) * 1981-12-29 1983-07-08 Toyoda Autom Loom Works Ltd 結束紡績用仮撚ノズル
DE102007040218A1 (de) * 2007-08-25 2009-02-26 Oerlikon Textile Gmbh & Co. Kg Spinnvorrichtung
CH709756A1 (de) * 2014-06-13 2015-12-15 Rieter Ag Maschf Spinndüse für eine Luftspinnmaschine sowie Luftspinnmaschine mit einer entsprechenden Spinndüse.
GB2529894A (en) * 2014-09-08 2016-03-09 Univ Tallinn Technology Device and method for preparing a continuous nanofibrous yarn

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3079745A (en) * 1960-08-23 1963-03-05 Du Pont Fluid twiste apparatus for twisting yarn
US3094374A (en) * 1961-07-11 1963-06-18 Du Pont Dry spinning process for preparing coalesced spandex filaments
US3204396A (en) * 1961-08-21 1965-09-07 Us Rubber Co Method for texturing thermoplastic yarn and apparatus
US3206922A (en) * 1961-06-19 1965-09-21 Teikokn Jinzo Kenshi Kabushiki Nozzle for producing crimped yarn by the twisting method
US3303639A (en) * 1965-06-23 1967-02-14 Monsanto Co Pneumtic false twister
US3340684A (en) * 1965-12-07 1967-09-12 Uniroyal Inc Yarn texturing apparatus and fluid diffuser therefor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3079745A (en) * 1960-08-23 1963-03-05 Du Pont Fluid twiste apparatus for twisting yarn
US3206922A (en) * 1961-06-19 1965-09-21 Teikokn Jinzo Kenshi Kabushiki Nozzle for producing crimped yarn by the twisting method
US3094374A (en) * 1961-07-11 1963-06-18 Du Pont Dry spinning process for preparing coalesced spandex filaments
US3204396A (en) * 1961-08-21 1965-09-07 Us Rubber Co Method for texturing thermoplastic yarn and apparatus
US3303639A (en) * 1965-06-23 1967-02-14 Monsanto Co Pneumtic false twister
US3340684A (en) * 1965-12-07 1967-09-12 Uniroyal Inc Yarn texturing apparatus and fluid diffuser therefor

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699759A (en) * 1967-03-23 1972-10-24 Michel Serge Maxime Lefebvre Apparatus for converting textile threads
US3577720A (en) * 1968-12-18 1971-05-04 Natan Albertovich Zax Device for twisting yarn
US3577721A (en) * 1969-02-12 1971-05-04 Phillips Fibers Corp Yarn string-up device
US3593511A (en) * 1969-02-18 1971-07-20 Electrospin Corp Twisting head for textile machine
US3650103A (en) * 1969-11-10 1972-03-21 Uniroyal Inc Process and apparatus for texturizing yarn
US3732684A (en) * 1971-02-23 1973-05-15 Du Pont Product and process
US3782617A (en) * 1971-06-18 1974-01-01 Luwa Ag Apparatus for withdrawing rapidly moving yarn material
US3750922A (en) * 1971-12-30 1973-08-07 Celanese Corp Aspirator
US4107911A (en) * 1976-06-18 1978-08-22 Murata Kikai Kabushiki Kaisha Pneumatic spinning apparatus
US4141121A (en) * 1976-12-13 1979-02-27 Glen Raven Mills, Inc. Apparatus for producing fluid jet teased yarns from short/medium staple multifiber spun yarns
US4476672A (en) * 1981-12-15 1984-10-16 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Air nozzle for fasciated yarn spinning
US4631912A (en) * 1985-05-09 1986-12-30 Burlington Industries, Inc. Initial threading for vacuum spinning
US5119623A (en) * 1989-08-24 1992-06-09 Fritz And Hans Stahlecker False-twisting nozzle for pneumatic false-twist spinning

Also Published As

Publication number Publication date
FR1561196A (de) 1969-03-28
DE1685892A1 (de) 1971-10-21
GB1209152A (en) 1970-10-21
CH514003A (de) 1971-10-15

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Owner name: JOHN BROWN INDUSTRIES LTD.; 100 WEST TENTH ST., WI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LEESONA CORPORATION; 333 STRAWBERRY FIELD RD., WARWICK, RI. A CORP. OF MA.;REEL/FRAME:003936/0206

Effective date: 19810501

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Owner name: LEESONA CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:JOHN BROWN INDUSTRIES LTD.;REEL/FRAME:003936/0238

Effective date: 19810331