US3137987A - Method and apparatus for drawtwisting yarn - Google Patents

Method and apparatus for drawtwisting yarn Download PDF

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Publication number
US3137987A
US3137987A US210743A US21074362A US3137987A US 3137987 A US3137987 A US 3137987A US 210743 A US210743 A US 210743A US 21074362 A US21074362 A US 21074362A US 3137987 A US3137987 A US 3137987A
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United States
Prior art keywords
yarn
driven
speed
draw
feed
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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
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US210743A
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English (en)
Inventor
Larry D Potts
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
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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
Priority to NL295427D priority Critical patent/NL295427A/xx
Priority to BE635127D priority patent/BE635127A/xx
Application filed by Monsanto Co filed Critical Monsanto Co
Priority to US210743A priority patent/US3137987A/en
Priority to FR941422A priority patent/FR1371268A/fr
Priority to CH888963A priority patent/CH413210A/fr
Priority to GB28056/63A priority patent/GB1027649A/en
Priority to DE19631435565 priority patent/DE1435565B2/de
Application granted granted Critical
Publication of US3137987A publication Critical patent/US3137987A/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
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/225—Mechanical characteristics of stretching apparatus
    • 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
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • 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
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/28—Driving or stopping arrangements for two or more machine elements possessing different characteristics but in operative association
    • D01H1/30—Driving or stopping arrangements for two or more machine elements possessing different characteristics but in operative association with two or more speeds; with variable-speed arrangements
    • D01H1/305—Speed control of the spindles in response to the displacements of the ring rail

Definitions

  • This invention relates to a method and apparatus for drawtwisting man-made filament yarn, such as nylon yarn or the like. More particularly, this invention relates to an improved method of drawtwisting filament yarn and a drawtwister with control means adapted to reduce the degree and the incidence of ribboning of yarn, threby providing more uniformly wound yarn packages.
  • Drawtwisters are employed in man-made yarn processing to stretch, twist, and package yarn in one continuous operation called drawtwisting.
  • a drawtwister of conventional construction has a series of oppositely disposed drawtwist positions. Each position comprises, in general, an assembly for stretching or attenuating yarn including cooperating draw and feed rolls driven at different peripheral speeds, and a draw pin located in the yarn path between the draw and feed rolls to localize the attenuation of the yarn.
  • Driving means is provided to retate the draw and feed rolls and to rotate a spindle adapted to carry a bobbin upon which the yarn is wound.
  • a ring twister assembly is operatively associated with the spindle and includes a reciprocable ring coaxially surrounding the spindle and a traveler guide mounted slidably on the ring.
  • the ring twister assembly applies twist to the yarn just before it is packaged.
  • Ribboning refers to a yarn winding condition characterized by the individual yarn wraps being repeatedly cries-crossed and overlapped in an infinite number of ribbon patterns forming ridges and grooves of different magnitudes at periodic locations on a package. Ribboning produces undesirable, non-uniformly wound packages, as well as packages which present problems of uneven take-01f tension, sloughing, and trapping of filaments in subsequent processing of yarn.
  • Ribboning may be caused by many factors.
  • a primary factor relates to the angular displacement of the components of the drawtwister resulting from imperfections in the drawtwister construction or by intentional angular displacement of the parts for operational reasons. For example, in normal operation of drawtwisters it is now common practice to tilt the traveler ring of the ring twister assembly slightly in relation to the axis of the spindle to improve package stability and to control tension qualities of the yarn. Tilting the traveler ring, although being a desirable operating procedure, predisposes the package building operation toward more severe ribboning. Another factor relates to the ratio of the speeds of the rotating components.
  • An object of this invention is to provide a method for drawtwisting yarn and an improved drawtwister yielding a more uniformly wound yarn package than that produced by employing conventional drawtwisters.
  • Another object is to provide a drawtwister with control means adapted to reduce the degree and incidence of ribboning encountered in drawtwisting.
  • Another object is to provide an improved drawtwister having variable speed spindle drive means and control means therefor to control the operation speed of the spindle selectively.
  • Another object is to provide a drawtwister adapted to build a yarn package exhibiting even take-off tensions, less sloughing, and less trapping of filaments in subse quent processing of the yarn.
  • the improved yarn drawtwister includes feed and draw roll means driven at different peripheral speeds to stretch man-made continuous filament yarn, such as nylon filament yarn, delivered thereto from a source.
  • a cooperating ring twister assembly including a traveler member mounted to orbit on a ring and a rotatable spindle to collect the stretched yarn, twists the yarn before it is packaged on a bobbin mounted on the rotatable spindle.
  • Controlled variable speed means is provided to control the speed of winding of the yarn on the bobbin carried on the spindle selectably for preventing ribbons from formingv at predetermined diameters thereon.
  • the variable speed means may be of conventional construction such as helical gear, electric clutch, friction type or the like.
  • the improved method comprises advancing continuous filament yarn from a source thereof to draw zone where it is attenuated to increase the molecular orientation thereof. After being stretched, the yarn is forwarded through a yarn twisting area for adding twist thereto. Thereafter, the twisted yarn is taken up in package form. To prevent ribbons from forming while the yarn is collected, the rate of collection of the yarn is cyclically varied.
  • FIGURE 1 is a diagrammatic view showing the improved drawtwister embodying the invention in operation
  • FIGURE 2 is a cross-section view taken along 2-2 of FIGURE 1 illustrating more clearly one variable speed means of the drawtwister with the outer housing being removed for convenience of illustration;
  • FIGURE 3 is a graph showing the diameters at which ribbons may form during packaging of a preselected yarn.
  • FIGURES l and 2 are designated by like reference numerals for convenience reasons.
  • FIGURE 1 of the drawing it will be noted that two drawtwist positions are shown on one side of the improved drawtwister for purposes of simplification. It will be understood that a multiplicity of oppositely arranged positions is the usual organization of a drawtwister. The invention will be described primarily in relation to one drawtwist position only, the others being similar.
  • the components of the drawtwister comprising the invention are suitably mounted on a large framework identified by the reference numeral 1.
  • a spin bobbin 2 packaged with lagged nylon yarn is supported overhead of the framework 1, preferably in a position above a pivotal cot roll 3 and a rotatable feed roll 4.
  • the cot and feed rolls are in peripheral surface engagement.
  • Feed roll 4 is one of a plurality of identical feed rolls positioned in spaced relation on a feed roll shaft 5.
  • a second feed roll shaft 5a is shown in part.
  • the feed roll shafts are arranged to be driven by any suitable driving means. The illustrated arrangement shows the shafts being connected therebetween by gears 6.
  • Shaft 5 is connected to a main drive shaft 7 by a belt 8 operatively mounted within pulleys.
  • Themain shaft 7 is powered by a motor 9.
  • a strand of nylon continuous filament yarn 10 extends generally downwardly through a pigtail guide 11 and then engages a snub guide 12. From snub guide 12., yarn 10 extendsinto engagement with a slow-moving traverse guide 13, and then through the nip between the cot and feed rolls.
  • Feed roll 4 which is normally driven at a predetermined constant speed by shaft 5, forwards yarn 10 generally downwardly to a draw pin 14.
  • the yarn is wound engagingly around the draw pin 14 one or more turns and is then advanced to and wrapped several turns around a driven draw roll 15 and around a separator roll 16.
  • Roll 16 is positioned adjacent to draw roll 15.
  • Draw roll 15 is mounted on one end of a rotatable shaft 17 having another draw roll (not shown) mounted at its opposite end.
  • Shaft 17 is connected to a shaft 18 by gears 19.
  • Shaft 18 is also connected to the main shaft 7 by gears 20.
  • the number of draw rolls on a drawtwister normally corresponds to the number of feed rolls on the corresponding side thereof.
  • the draw roll 15 is driven at a relatively higher speed than is feed roll 4 in accordance with a predetermined draw ratio so as to stretch the yarn, the point of stretch being localized at the draw pin 14.
  • the feed and draw rolls are driven by motor 9. It should be understood that the driving arrangement for the feed and draw rolls has been somewhat simplified for purposes of clarity.
  • yarn 10 travels to and is collected on a bobbin 26 supported on a rotatable spindle 27.
  • Spindle 27 is connected by a tape or belt 28 to a drum 29 mounted axially on a driven shaft 30.
  • tape 28 normally drives four spindles; and a plurality of drums 29 are normally carried on driven shaft 30.
  • Driven shaft 30 and main shaft 7 are normally of the same diameter and are axially aligned in spaced end to end arrangement.
  • a variable speed cou pling 31 is interposed between and connects the main shaft 7 to the driven shaft 30 to impart variable speeds to the driven shaft 30.
  • a control device 32 is connected to the variable speed coupling 31 and permits selection of operating speeds.
  • Coupling 31 normally enclosed in a housing may be of known variable speed design.
  • the illustrated coupling is of the electric clutch type and comprises a main shaft 7 and driven shaft 30.
  • a jack-shaft 34 is suitably journaled in spaced and parallel relation to the main and driven shafts.
  • a pair of pulleys 35 and 36 are fixedly mounted on the jackshaft 34, each at a respective end thereof.
  • a pulley 37 is fixedly mounted on the end of main shaft 7 and is connected to pulley 35 on one end of jackshaft 34 by a belt 38.
  • An overrunning clutch 39 which may be of any conventional design and which has a pulley 40 connected therewith, is coaxially mounted on and positively connected to the driven shaft 30.
  • Pulley 40 is connected by a belt 41 to pulley 36 on the other end of jackshaft 34.
  • An adapter member 42 is fixedly connected to pulley 37 on main shaft 7 and is mounted coaxially about the end of the main and driven shafts.
  • Adapter member 42 carries an annular, axially slidable clutch armature 43.
  • a driven rotor 44 is fixedly mounted on the driven shaft 30 and is normally selectably energized through a field and coil 45 concentrically surrounding the driven shaft 30.
  • the coil 45 is connected to control device 32 by leads 46 and the control device 32 is connected to a source of electrical power.
  • Control device 32 is provided with an energizing switch 47 movable to a normal speed position at which it is shown and to a reduced or increased speed position. In the normal speed position shaft 30 is driven directly through the electric clutch. While in the reduced speed position, shaft 30 is driven through the system of pulleys and belts. The amount of reduction or increase in spindle speed is controlled by proper selection of pulley sizes.
  • the denier of yarn before and after being drawn should be predetermined; and the operating speeds must be determined or given. Calculations are made to determine the diameters at which the most severe ribbons, or the ribbons to be considered in programming the control device 32, will be formed on a bobbin while yarn is being collected thereon.
  • Ribbons are known to be associated with the speed with which yarn is collected on a bobbin at various package diameters as related to the traveler speed.
  • a system for classifying the infinite ribboning patterns is provided. According to this identification system, ribbons are classified by degree of severity beginning with a primary ribbon.
  • a primary ribbon according to the outlined system, is a ribbon of the most severe and undesirable type.
  • a primary ribbon is formed by a repeating winding pattern wherein each wrap circumscribes one or more sinusoidal curves and each successive wrap corresponds to the succeeding wrap so that a generally parallel wind pattern is established within a localized zone on the bobbin.
  • a secondary ribbon is then defined as a type of wind pattern where every alternate wrap applied on the bobbin is parallel, thus wraps 1, 3, etc., are parallel and wraps 2, 4, etc. are parallel to each other.
  • a tertiary wrap is defined as a wind pattern having a repeating incidence every third wrap, a quantanary ribbon having repeating incidence every fourth wrap, and ad infinitum. As the type of ribbon increases numerically higher, the less severe is the ribbon. It should be noted that each class may further be divided into orders according to the fractional part or Whole number of sine curves involved in one wrap of yarn on the bobbin.
  • a ribbon graph shows the diameters on a bobbin at which primary and secondary ribbons will be formed in the processing of a monofilament yarn having a denier of 35, if the drawtwister spindle speed is 6000 r.p.m. and the yarn is being delivered to the traveler at 500 yards/ minute.
  • the diameters at which ribboning occurs are calculated by obtaining a continuous reading of the ratios of the r.p.m. of the traveler to the number of winds/minute of the yarn on the bobbin at all times while the yarn is being packaged. From the definitions given of a primary and secondary ribbon, one can readily compute the points or diameters at which these ribbons will occur.
  • ratio is a whole number factor as 2: 1, 3:1, etc., it may be concluded that a primary ribbon will be formed because a similar parallel wrap will be repeated for each wind of yarn on the bobbin.
  • the primary and secondary ribbons can be circumvented or by-passed.
  • a speed yielding ribbon forming areas at package diameters intermediate the ribbons formed at the normal speed is preferably selected.
  • the alternate speed selected is 5500 r.p.m.
  • the primary and secondary ribbons will be formed at points marked P and S. Having made these preliminary calculations the improved drawtwister can be operated to reduce the incidence of ribboning in the following manner.
  • the yarn 10 is drawn by the differential speeds of the feed and draw rolls and is collected on bobbin 26 after being twisted by the action of the traveler member 22.
  • the energizing switch 47 on the control device 32 is moved to the normal speed position, as shown in the drawing, so as to energize the rotor 44 for attracting the clutch armature 43, thereby establishing a direct drive through the main shaft 7.
  • the overrunning clutch 39 will overrun and spindle 27 will be driven at a speed corresponding to the speeds of the main and driven shafts which in this case are equal.
  • the improved drawtwister provides yarn packages which are more uniformly wound than packages containing conventional drawtwisted yarn.
  • the appearances of the packages are also improved. By reducing the number of severe ribbons on a package, sloughing, uneven takeoff tensions, and trapping of yarn are minimized in subsequent processing of the yarn.
  • a drawtwister provided with a source of yarn supply comprising in combination:
  • drive means including a main shaft for operatively driving said draw rolls, said feed and cot rolls, and said reciprocating rings, and including a driven shaft axially aligned in spaced relation with said main shaft for operatively driving said spindles;
  • variable speed means adapted to connect and disconnect said main and said driven shafts to selectively control the ratio of the speed of said plurality of spindles in relation to the speed of travel of said traveler members therearound to prevent formation of ribbons in the yarn normally being packaged on said bobbins.
  • a drawtwister provided with a source of yarn supply comprising in combination:
  • drive means including a main shaft for operatively driving said draw rolls, said feed and cot rolls, and said reciprocable rings, and including a driven shaft axially aligned in spaced relation with said main shaft for operatively driving said spindles;
  • control means connected to a source of electrical energy and to said coil member
  • control means being adapted to permit selective energizing of said rotor for attracting said clutch armature and permitting said driven shaft to be directly driven through said main shaft while said overrunning clutch overruns so as to drive said spindles at one speed, and adapted to cut off said source of energy to said rotor for disengagement of said clutch armature therefrom permitting said driven shaft to be driven by said main shaft through said jackshaft so as to drive said spindles at a different speed for selectively controlling the rates of speed of said spindles in relation to the speed of travel of said traveler members about said spindles to circumvent ribbon forming ranges on the yarn package normally being formed on said bobbins.
  • a drawtwister provided with a source of yarn supply comprising in combination:
  • control means connected to said two speed reduction gear clutch and being selectively positionable to a normal speed position for driving said plurality of spindle means at a normal speed and positionable to a reduced speed position for driving said plurality of spindle means at a reduced speed for circumventing primary and secondary ribbons normally encountered in packaging the yarn on said bobbins.
  • a drawtwister provided with a source of yarn supply comprising in combination:
  • control means connected to said electric clutch and to a source of electrical energy for operatively programming different speeds of rotation to said plurality of spindle means to prevent formation of ribbons in the yarn being wound on said bobbins.
  • a drawtwister provided with a source of yarn supply comprising in combination:
  • variable speed ribbon breaker means interposed in and driven by said main driven shaft
  • control means connected to said variable speed ribbon breaker means for selectively controlling the speed of said rotatable spindle means so as to prevent ribboning of the yarn being collected on said bobbin.
  • variable speed ribbon breaker means is a variable speed clutch.
  • a yarn drawtwisting process for forming a yarn package free of ribbons in preselected primary and secondary ribbon zones therein comprising the steps of:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US210743A 1962-07-18 1962-07-18 Method and apparatus for drawtwisting yarn Expired - Lifetime US3137987A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL295427D NL295427A (en(2012)) 1962-07-18
BE635127D BE635127A (en(2012)) 1962-07-18
US210743A US3137987A (en) 1962-07-18 1962-07-18 Method and apparatus for drawtwisting yarn
FR941422A FR1371268A (fr) 1962-07-18 1963-07-15 Procédé et dispositif pour filer des filaments
CH888963A CH413210A (fr) 1962-07-18 1963-07-16 Procédé de filage d'un fil synthétique et appareil pour sa mise en oeuvre
GB28056/63A GB1027649A (en) 1962-07-18 1963-07-16 Ring drawtwisting yarn
DE19631435565 DE1435565B2 (de) 1962-07-18 1963-07-18 Verfahren zum streckzwirnen sowie streckzwirnmaschine

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Application Number Priority Date Filing Date Title
US210743A US3137987A (en) 1962-07-18 1962-07-18 Method and apparatus for drawtwisting yarn

Publications (1)

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US3137987A true US3137987A (en) 1964-06-23

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US210743A Expired - Lifetime US3137987A (en) 1962-07-18 1962-07-18 Method and apparatus for drawtwisting yarn

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US (1) US3137987A (en(2012))
BE (1) BE635127A (en(2012))
CH (1) CH413210A (en(2012))
DE (1) DE1435565B2 (en(2012))
GB (1) GB1027649A (en(2012))
NL (1) NL295427A (en(2012))

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3358433A (en) * 1965-10-01 1967-12-19 Ici Ltd Collection of synthetic polymeric yarns or filaments
US3377793A (en) * 1965-01-04 1968-04-16 Tmm Research Ltd Ring spinning and twisting machine and process
US3443373A (en) * 1966-11-21 1969-05-13 Jefferson Mills Inc Variable speed spinning frame
US3451208A (en) * 1966-08-04 1969-06-24 Ici Ltd Collection of yarns by over-end winding
US3451209A (en) * 1966-09-01 1969-06-24 Ici Ltd Over-end winding of yarn
US3452534A (en) * 1966-09-01 1969-07-01 Ici Ltd Over-end winding of yarn
US3452533A (en) * 1966-09-01 1969-07-01 Ici Ltd Over-end winding of yarn
US3477221A (en) * 1966-04-14 1969-11-11 Glanzstoff Ag Process for improving the uniformity of the modulus of elasticity in a draw twist wound thread cop
US3488938A (en) * 1964-04-04 1970-01-13 British Nylon Spinners Ltd Method and apparatus for winding yarn
US3521441A (en) * 1967-06-05 1970-07-21 Rieter Ag Maschf Process and apparatus for reducing yarn waste in draw-twisters
US3886721A (en) * 1967-01-17 1975-06-03 Ici Ltd Method for over-end winding of yarns
US4504021A (en) * 1982-03-20 1985-03-12 Barmag Barmer Maschinenfabrik Ag Ribbon free wound yarn package and method and apparatus for producing the same
US4504024A (en) * 1982-05-11 1985-03-12 Barmag Barmer Maschinenfabrik Ag Method and apparatus for producing ribbon free wound yarn package
US5620797A (en) * 1995-09-05 1997-04-15 Mallonee; William C. Polypropylene and polyester conjugate carpet face yarn
WO2006125464A1 (de) * 2005-05-21 2006-11-30 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum führen und fördern mehrerer fäden
CN109825907A (zh) * 2019-03-13 2019-05-31 巢湖雅戈尔色纺科技有限公司 交变牵伸四通道纺纱装置及变支变比变捻纱线的纺制方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1129453A (en) * 1965-02-02 1968-10-09 Ici Fibres Ltd Yarn packages
DE3210244A1 (de) * 1982-03-20 1983-09-22 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Verfahren zur spiegelstoerung beim aufwickeln eines fadens in wilder wicklung
US8970873B2 (en) 2010-09-17 2015-03-03 Printeron Inc. System and method for managing printer resources on an internal network

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1796391A (en) * 1930-04-10 1931-03-17 Davis & Furber General drive for spinning frames
US2785527A (en) * 1952-04-01 1957-03-19 Darcy E Lewellen Control for spinning frame
US3009308A (en) * 1960-03-10 1961-11-21 Chemstrand Corp Drawtwisting machinery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1796391A (en) * 1930-04-10 1931-03-17 Davis & Furber General drive for spinning frames
US2785527A (en) * 1952-04-01 1957-03-19 Darcy E Lewellen Control for spinning frame
US3009308A (en) * 1960-03-10 1961-11-21 Chemstrand Corp Drawtwisting machinery

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3488938A (en) * 1964-04-04 1970-01-13 British Nylon Spinners Ltd Method and apparatus for winding yarn
US3377793A (en) * 1965-01-04 1968-04-16 Tmm Research Ltd Ring spinning and twisting machine and process
US3358433A (en) * 1965-10-01 1967-12-19 Ici Ltd Collection of synthetic polymeric yarns or filaments
US3477221A (en) * 1966-04-14 1969-11-11 Glanzstoff Ag Process for improving the uniformity of the modulus of elasticity in a draw twist wound thread cop
US3451208A (en) * 1966-08-04 1969-06-24 Ici Ltd Collection of yarns by over-end winding
US3451209A (en) * 1966-09-01 1969-06-24 Ici Ltd Over-end winding of yarn
US3452533A (en) * 1966-09-01 1969-07-01 Ici Ltd Over-end winding of yarn
US3452534A (en) * 1966-09-01 1969-07-01 Ici Ltd Over-end winding of yarn
US3443373A (en) * 1966-11-21 1969-05-13 Jefferson Mills Inc Variable speed spinning frame
US3886721A (en) * 1967-01-17 1975-06-03 Ici Ltd Method for over-end winding of yarns
US3521441A (en) * 1967-06-05 1970-07-21 Rieter Ag Maschf Process and apparatus for reducing yarn waste in draw-twisters
US4504021A (en) * 1982-03-20 1985-03-12 Barmag Barmer Maschinenfabrik Ag Ribbon free wound yarn package and method and apparatus for producing the same
US4504024A (en) * 1982-05-11 1985-03-12 Barmag Barmer Maschinenfabrik Ag Method and apparatus for producing ribbon free wound yarn package
US5620797A (en) * 1995-09-05 1997-04-15 Mallonee; William C. Polypropylene and polyester conjugate carpet face yarn
WO2006125464A1 (de) * 2005-05-21 2006-11-30 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum führen und fördern mehrerer fäden
CN109825907A (zh) * 2019-03-13 2019-05-31 巢湖雅戈尔色纺科技有限公司 交变牵伸四通道纺纱装置及变支变比变捻纱线的纺制方法
CN109825907B (zh) * 2019-03-13 2023-09-19 安徽新雅新材料有限公司 交变牵伸四通道纺纱装置及变支变比变捻纱线的纺制方法

Also Published As

Publication number Publication date
NL295427A (en(2012))
GB1027649A (en) 1966-04-27
CH413210A (fr) 1966-05-15
DE1435565A1 (de) 1969-07-10
BE635127A (en(2012))
DE1435565B2 (de) 1971-09-09

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