US3323302A - Method for producing yarn - Google Patents
Method for producing yarn Download PDFInfo
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- US3323302A US3323302A US344711A US34471164A US3323302A US 3323302 A US3323302 A US 3323302A US 344711 A US344711 A US 344711A US 34471164 A US34471164 A US 34471164A US 3323302 A US3323302 A US 3323302A
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- spandex
- yarn
- rolls
- staple fibers
- spandex yarn
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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
Definitions
- the present invention relates to improvements in methods of producing elastic or stretch-type core spun yarns, and the invention, in all of its aspects, is particularly well-adapted for use in producing composite stretch yarns wherein a sheath or covering of staple fibers is spun about a strand or core of elastic spandex or its equivalent.
- spandex core spun elastic yarn must have the sheath of staple fibers spun about the spandex while the spandex yarn is in a stretched or elastically-elongated condition, the spandex yarn must be presented to the spinning position in its stretched condition.
- the nature of spandex yarn has heretofore caused this operation to be too difiicult to perform uniformly or satisfactorily.
- Spandex yarn is supplied to the industry on pirns, wherein the spandex yarn is wrapped in multiple layers about a core.
- spandex yarns have sought to treat their products with lubricants and the like to avoid this problem, but their efforts, for the most part, have not been successful.
- the erratic and irregular behavior of spandex yarn has continued to present difiiculties for which spinners have previously had no practical or satisfactory solution.
- tensioning devices of the type which exert friction on the yarn cannot be used, and, because of the quickly changing erratic behavior of the spandex yarn, those tensioning schemes responsive to the tension in the yarn itself also are of little or no use. The result has been that the spandex yarn has reached the spinning site in varying states of tension or elongation, and the finished yarn has accordingly been nonuniform.
- the nonuniform yarn has had lengths thereof wherein the spandex yarn core has been under-tensioned, and other lengths thereof wherein the spandex core yarn has been over-tensioned. Fabrics made of such yarns consequently have appeared to be "ice of a nonuniform texture and have not been commercially acceptable for many uses.
- One of the principal objects of the present invention is to provide a relatively inexpensive method for spinning elastic core spun yarn wherein the aforementioned difiiculties are avoided and overcome, thereby producing a finished core spun elastic yarn that is substantially uniform throughout its length and is useful in the production of knitted and woven fabrics of all kinds, including fabrics for clothing and the like.
- Another object of the present invention is to provide a method for spinning elastic core yarn on a spinning frame having drawing rolls including front rolls, and a spindle having a bobbin thereon, wherein staple fibers of any suitable kind, including cotton, wool, or synthetic staple fibers, are passed through the drawing rolls to the bobbin, and an elastomeric yarn of spandex or the equivalent is fed from a supply thereof to the bite of the front rolls and to the ribbon of staple fibers passing therethrough, the elastomeric yarn being subjected, without substantial sliding friction thereon, to a substantially constant braking force, at a position located between the supply and the front rolls, independently of the tension or speed of travel of the elastomeric yarn, the elastomeric yarn being thereby substantially uniformly elastically elongated and tensioned and being maintained in that state as it passes through the front rolls, and from the front rolls to the bobbin, during the latter of which passage the staple fibers are spun about the elastically and substantially uniformly elongated elastomeric yarn
- Still another object of the present invention is to provide a method of the character just stated, wherein the elastomeric yarn is tensioned and controlled by passing the same across a wheel located adjacent the path of travel of the elastomeric yarn to the front rolls, the wheel being driven by the elastomeric yarn and a substantially constant magnetic drag or braking force is applied to the wheel entirely independently of the degree of tension that may exist in the elastomeric yarn and substantially independently of the speed of the yarn, thereby substantially uniformly elastically elongating the elastomeric yarn before it reaches the site where the staple fibers are spun thereabout.
- Yet another object of the invention is to provide a method and apparatus of the character described above, wherein the elastomeric yarn is fed along a path of substantial length from the supply to the front rolls and wherein any momentary elastic elongations of the elastomeric yarn produced by irregular or erratic release of the elastomeric yarn from the supply, are caused to be distributed substantially throughout the length of the elastomeric yarn in the path, thereby minimizing and rendering substantially inconsequential the degree of momentary elongation in each longitudinal segment of the elastomeric yarn in the path and as the elastomeric yarn reaches the front rolls.
- Additional objects of the invention include providing a method and apparatus having the aforesaid characteristics, wherein the elastomeric yarn is withdrawn from its supply in a manner tending to minimize momentary catching of the yarn; the feeding of the elastomeric yarn and the spinning of the staple fibers thereabout are carried out so as to minimize the twist produced in the elastomeric core yarn; the spinning is carried out in a manner to avoid overheating and adversely affecting the resiliency of the elastomeric yarn as it passes through a spinning traveler; and the spun yarn is treated to reduce its liveliness without adversely affecting the resiliency or stretched condition of the elastomeric core yarn.
- FIGURE 1 is a vertical section taken through a spin- .ng frame, illustrating in side elevation one form of the pparatus of the present invention and upon which the le method may be practiced;
- FIG. 2 is a greatly enlarged fragmentary elevational iew, partially in section, showing a short length of elastic ore spun yarn of the kind which may be produced with 1e use of the present apparatus and method, the short :ngth of yarn being illustrated in its elongated or ten- .oned condition;
- FIG. 3 is an enlarged cross-sectional view of the draw- 1g roll section of the apparatus shown in FIG. 1;
- FIG. 4 is an enlarged schematic fragmentary top plan iew of that portion of the apparatus shown in FIG. 3, 11th most of the upper portions thereof removed to perait illustration of the passage of rovings of staple fibers herethrough when two rovings are used, the view also llustrating the position where the elastomeric core yarn s deposited with respect to the two rovings as the rovngs and the elastomeric yarn reach and pass through the ront rolls of the apparatus; and
- FIG. 5 is an enlarged vertical cross-sectional view taken ubstantially along the line 55 in FIG. 1, illustrating in :ross-section a hysteresis brake assembly employed in he apparatus, a supporting bracket for the assembly being .hown by broken lines.
- FIGS. 1 and 3 The apparatus shown in FIGS. 1 and 3 is a ring-type :pinning unit largely of standard and well-known con- ;truction, but modified to incorporate the novel features 3f the present invention. Only one unit of the spinning frame is shown, it being understood that a plurality of .ike units are arranged in side-by-side relationship in a :omplete spinning frame. In the single unit shown, a spandex yarn 11 or, its equivalent is withdrawn from a pirn or spool 12 thereof which is comprised, in the normal case, of a hollow tube-like core (not shown) about which the spandex or segmented elastomer has been wrapped in layers of convolutions.
- the pirn 12 is mounted in fixed position upon a forwardly-projecting shelf 15 that is mounted, as by a bracket 16, upon the upper end of an upstanding rod 17, the lower end of which is fixedly secured in any suitable manner upon a second shelf 18 that is fixed to a frame member 19 of the spinning frame.
- Spandex refers to a manufactured elastomeric fiber in which the fiber-forming substance is a long chain synthetic elastomer comprised of a segmented polyurethane or its equivalent.
- Spandex of which there are several compositions available, is ideally suited for use in stretch-type knitted or woven goods and fabrics of various kinds, because of its ability to be stretched several times its normal length and thereafter to return substantially to that normal length.
- Spandex is supplied by its manufacturers in wound pirns or spools similar to the pirn 12 shown in FIG.
- the core of the pirn 12 is preferably securely fixed to the shelf 15.
- a bolt 14, having its lower end fixed in the shelf 15, may extend upwardly through the hollow core of the pirn, with the pirn held in fixed position by means of a nut 13 threaded upon the bolt 14 and with the use of a suitable washer 13a bearing upon the upper end of the core of the pirn. Care must, of course, be taken to see that the washer 13a is not of a diameter so large as to overlie the convolutions of spandex on the pirn. If desired, the lower end of the core of the pirn may rest upon a suitable pedestal (not shown) secured to the shelf 15, so as to keep the lower convolutions of the spandex on the pirn out of contact with the shelf.
- the spandex 11 is withdrawn from the pirn 12 in an upward direction and through the eye of a relatively large pigtail 20, of brass or the like, one end of which is securely fixed in any suitable manner upon the upper end of an upstanding bracket 21 mounted upon the shelf 15 adjacent the pirn 12.
- the eye 22 of the pigtail is located directly above the pirn and in alignment with the axis thereof.
- the spandex fiber 11 extends forwardly and somewhat downwardly to a rotary hysteresis brake assembly designated generally by the numeral 23. This hysteresis brake assembly will be described more fully hereinafter.
- the brake assembly is mounted upon a forwardly and upwardly extending bracket 24 secured to the shelf 15, the brake assembly including a rotary wheel 25 about which the spandex fiber 11 is entrained in one complete revolution plus an approximate one-quarter revolution. From the wheel 25 the spandex fiber 11 extends downwardly through the loop of a downwardly and forward extending wire finger 26 (FIG. 3) securely mounted on a bar 27, as by a bolt 28 and a nut 29, the bar 27 being carried on a bracket 30 fixed upon a traversing bar 31.
- the traversing bar 31, as will be later explained, is longitudinally moved slowly back and forth during the spinning operation.
- the spandex fiber 11 is led into the head portion 32 (FIG. 2) of the spinning frame.
- This head portion includes a frame 33 (FIG. 3) carried by upstanding pedestals 34 which are fixed to a forwardly-projecting frame element 35 carried by or suitably secured to the frame member 19 of the spinning frame.
- the head 32 includes the usual rear drafting rolls 36 and 37 and intermediate rolls 38 and 39, about the latter of which is entrained a pair of rubber aprons 40 or the like which are driven :by the rolls 38 and 39 in the direction of the arrow 41.
- the head 32 also includes the usual front rolls 42 and 43, together with the usual lintremoving rolls 44, 45 and 46.
- each spool of roving being wound upon a spindle 48 which is rotatably mounted in a vertical axial positon and seated in suitable bearings provided in the shelf 18 and the shelf 15.
- a spindle 48 which is rotatably mounted in a vertical axial positon and seated in suitable bearings provided in the shelf 18 and the shelf 15.
- FIG. 1 only one such spool of roving 47 is shown, but it will be appreciated that one, or two or more spools of roving may be employed.
- the staple roving fibers 49 are drawn forwardly and pass through a trumpet-like guide mounted upon the traversing bar 31. As shown in FIG.
- the trumpet-like guide 50 is provided with two bells 51 through which the roving fibers 49 are respectively passed. If only one spool 47 of roving is employed, the trumpet-like guide 50 will, of course, have only one bell 51. Similarly, if three roving spools 47 are used, the trumpet-like guide 50 will have three bells 51. From the trumpet-like guide 50, the roving fibers 49 pass forwardly between the aprons 40 and thence forwardly between the front rollers 42 and 43.
- the various rolls of the head 32, and the aprons 40 are driven in a manner well-known in the art of spinning so as to draw out and lengthen the roving fibers 49 as they pass through the head 32.
- the spandex fiber 11 passes downwardly through the loop of the downwardly and forwardly projecting finger 26, through a guide and into position in the substantially-direct alignment with the longitudinal center line of the roving fibers 49 as they pass into or between the front rolls 42 and 43 of the head 32.
- the spandex fiber 11 is introduced or laid into the single strand of roving 49 substantially directly in alignment with the longitudinal center line of that single strand.
- the spandex fiber 11 is introduced directly between the two as they enter the front rolls 42 and 43. Similarly, when three rovings 49 are employed, the spandex fiber 11 is introduced substantially in alignment with the center line of the middle strand of roving 49.
- the spandex fiber 11 passes through the bite of the front rolls 42 and 43 with the roving fibers, and from the front rolls 42 and 43 the roving 49 and the spandex fiber 11 pass downwardly together in the direction of the arrow 56 (FIG. 1) and extend through a spiral looped eyelet 57 mounted on a bar 58. From the eyelet 57, the spandex fiber, about which is now spun the roving fibers 49, extends downwardly to be Wound upon a bobbin 59.
- the bobbin 59 is mounted in the usual manner upon a spindle 60 which is journaled in a suitable bearing 61 fixed in a frame member 62.
- the spindle is provided with a pulley 63 and is driven by a belt 64 extending from a drive motor or other drive mechanism 65.
- spandex fiber 11 and the rovings 49 pass to the bobbin 50, they extend through a metal clip or traveler 66 which travels around the bobbin on a ring 67 with which it has a sliding interlocking connection.
- the ring 67 is mounted on a rail, in the usual fashion, which is reciprocated upwardly and downwardly by well-known means to distribute the finished yarn over the bobbin in regular fashion as the spinning and winding proceeds.
- the bobbin 59 is rotated at high speed while the front rolls 42 and 43 are rotated at a much slower speed.
- the pirn 12 is preferably placed on the shelf 15 in a position such that the unwinding of the spandex fiber 11 from the pirn takes place in a counterclockwise direction, as viewed from a position looking downwardly toward the upper end of the pirn. It will thus be appreciated that the spandex strand 11, which is normally initially wound on the pirn 12 in an untwisted condition, has a twist introduced into it as the spandex fiber is withdrawn from the stationary pirn.
- the preferable direction of rotation of the bobbin 59 is such that the spinning of the roving fibers 49 about the spandex fiber 11 is in the direction opposite this twist, so that the initial twist introduced into the spandex as it is removed from the pirn 12 is itself removed during the spinning of the yarn that takes place in the yarn between the exit rolls 42 and 43 and the bobbin 59. Because of the removal of this initial twist, and because the spandex fiber 11 is introduced to the roving fibers at substantially the longitudinal center lines of those fibers as they enter between the exit rolls 42 and 43, the sheath 70 is spun uniformly about the spandex fiber 11, and the spandex fiber 11 in the fully-spun yarn has itself insufficient twist to cause objectionable twist liveliness to the finish yarn.
- the yarn is preferably subjected to a controlled moistening operation for the purpose of reducing the liveliness of the yarn caused, not by the spandex fiber 11 itself, but by the spun fibers of the sheath 70 about the spandex.
- This moistening operation is preferably carried out in a hermeticallysealed cabinet or container.
- the yarn is removed from the bobbins 59 and Wound on other cores which are placed within the cabinet or chamber, and the interior of the cabinet is subjected to a vacuum-producing apparatus which produces a vacuum within the chamber or cabinet of about 28 inches of mercury.
- This vacuum condition is maintained in the cabinet for about seconds to remove most of the air from the yarn, whereupon steam is introduced into the interior of the cabinet from a steam line at about 20* ounds gauge pressure,
- suffi-cient steam is injected into the cabinet to raise the temperature therein to a preferred temperature less than 160 F. and preferably approximately F.
- This preferred temperature is maintained for a period of about four minutes, whereupon the steam is cut off and a vacuum of about 10 inches of mercury is drawn in the cabinet for approximately 30 seconds.
- the introduction of the steam into the cabinet introduces that and moisture to the finished yarn, thereby reducing and minimizing the liveliness of the finished yarn caused by the sheath 70 thereof, and the final vacuum applied to the interior of the cabinet serves to remove any excess moisture from the finished yarn.
- the maintenance of the temperature at 150 F. during this yarn treatment does not adversely affect the spandex fiber 11 in the yarn and does not substantially reduce its resilience. It will, of course, be appreciated that the temperatures referred to above be varied to suit the particular material of materials being employed in the sheath 70. It is important, however, that the temperature, in any event, be less than 212 F., inasmuch as loss of resiliency of the spandex will be experienced if that temperature is reached or exceeded for any appreciable length of time.
- the hysteresis brake assembly 23 which is shown in cross-section in FIG. 5 of the drawings, includes a horizontally-disposed through-bolt 75 that is threaded or secured in any suitable fashion to the upstanding bracket 24.
- a generally-circular backing member 76 provided with a hub 77 is threaded onto the bolt 75 adjacent the Wheel 25, the backing member being provided with an annular lip 78 which slightly overhangs the wheel 25 to provide a recess within which the wheel turns.
- the wheel 25 is preferably formed of nylon or any other suitable plastic material and is provided about its periphery with diverging flanges 79 and 80 which form a generally- V-shaped peripheral groove for receiving the strand of spandex fiber 11.
- the inner surface of the V- shaped groove may be in the form of alternating interlaced fingers or raised surfaces which serve to prevent the spandex fiber from slipping with respect to the wheel 25.
- the center portion of the wheel 25 is provided with a ball-bearing assembly 81, the inner race .of which is fixed to the through-bolt 75.
- the outer race of the bearing assembly is secured within an iron or steel hysteresis ring 82, and the outer periphery of that ring is fixed to the central disk portion 25a of the wheel. It will thus be understood that the Wheel 25 with the hysteresis ring 82 is adapted to turn as a unit about the axis of the throughbolt 75 on the ball-bearing assembly 81.
- a barrel member 85 of plastic or other nonmagnetic material is axially threaded upon the through-bolt 75.
- the inner end of the barrel is provided with a recess 86, and the opposite or outer end of the barrel is preferably provided with a recess 87.
- a pair of substantially-cylindrical Alnico permanent magnets 88 and 89 are fixedly mounted in the body of the barrel 85 between the recesses 86 and 87, with the inner ends of the Alnico magnets extending slightly into the recess 86 and to a position directly opposite and adjacent the hysteresis ring 82.
- the outermost ends of the Alnico magnets may be secured to a brass or other nonmagnetic plate 90 seated within the recess 87, and the plate 90 may be secured to the barrel 85 within the recess by means of a pair of screws 91, the head of only one of the screws being seen in FIG. 5.
- the central portion of the plate 90 has a plastic stop-nut 92 fixed thereon which is threaded upon the through-bolt 75 and provides the means by which. the barrel 85 is threaded upon the bolt 75.
- a cap 95 may be threaded upon the end of the through-bolt 75 within the recess 87 and held in fixed position by means of a cap-nut 96 also threaded upon the through-bolt.
- a stop pin 97 Fixed upon the inner surface of the cap 95 may be a stop pin 97 in position to engage a similar stop pin (not shown) fixed upon the plate 89. In this fashion the barrel 85, if desired, may be limited in its adjustable rotary movement to slightly less than one full revolution.
- a substantiallyconstant braking or tensioning force is applied by the wheel 25 upon the spandex strand II as that strand passes from the wheel 25 downwardly through the loop of the wire finger 26 and into the front rolls 42 and 43 of the spinning head 32, Without regard to the speed of the strand and independently of the tension in the strand as it reaches the wheel 25.
- the barrel 85 is preferably adjusted on the through-bolt 75 so as to cause the hysteresis ring 82 and thus the wheeel 25 to apply to the spandex strand 11 sufficient braking force as to cause the strand, after it passes from the wheel, to be elongated on the order of about 250 to 300 percent of its normal relaxed length.
- this braking force is preferably about 10 grams and the barrel 85 is rotatably adjusted to cause the brake assembly to provide approximately that amount of braking force.
- the braking force may, of course, be adjusted, by adjustment of the barrel 85, to provide such elongation of the spandex fiber 11 as may be desired,
- the braking force selected causes the spandex fiber 11 to be substantially uniformly tensioned and stretched as it is fed downwardly through the loop of the wire finger 26 and into position between the bite of the front rolls 42 and 43. It is important that substantially this same amount of tension be maintained in the spandex fiber as it passes from the front rolls 42 and 43 to the bobbin 59 and while the roving fibers are being spun about the spandex fiber, and this maintenance of the tension is achieved, by technique well-known in the spinning art, by adjusting the rotative speed of the spindle 60 with respect to the rotative speed of the front rolls 42 and 43 and by utilizing a traveler 66 of the proper weight.
- any momentary elastic elongations of the spandex fiber 11 produced by irregular or erratic release of the spandex from the pirn 12, are distributed substantially throughout the length of the spandex yarn 11 in that path, thereby minimizing and rendering substantially inconsequential the degree of momentary elongation in each longitudinal segment of the spandex in the path as the spandex fiber reaches and enters the bite between the front rolls 42 and 43.
- the path length should be at least 30 inches, and the optimum path length, for easy handling and high. degree of control, exclusive of that portion of the spandex fiber wrapped around the wheel 25, has been found to be from 40 to 50 inches. Somewhat longer path lengths may be used, provided the spandex fiber .11 ahead of the brake assembly 23 is properly supported without substantial friction, so as to prevent the weight of the spandex and friction from causing uncontrolled substantial elastic elongation of the fiber.
- the vertical distance from the top of the pirn 12 to the eye 22 of the pig-tail 20 should be at least two times the outside diameter of the pirn when the latter is full.
- the elastic spun yarn produced with the use of the present apparatus and in accordance with the present method may be of any size and weight desired, and the spandex fiber 11 employed therein may likewise be of any weight or size desired and may be either multifilament or monofilament.
- the staple fibers 49 employed in the manufacture of the yarn may be either natural fibers such as cotton or wool or may be any of the great number of suitable synthetic fibers, such as rayon, nylon, polyacrylonitrile staple, or polyethylene terephthalate staple, and the like, or appropriate blends of any of the foregoing.
- the yarn within practical limits, may also have any degree of elasticity desired, depending upon the size and nature of the spandex fibers employed and depending upon the amount of elastic elongation of those fibers produced by the selected adjustment of the hysteresis brake as described above.
- the method of producing an elastic spandex coreyarn on a yarn manufacturing frame having rolls including front rolls, and a spindle having a bobbin thereon comprising the steps of: passing a ribbon of staple fibers through said front rolls and thence to said bobbin, withdrawing a substantially untensioned spandex elastomeric yarn from a supply thereof and feeding said spandex yarn to said front rolls and to said ribbon of staple fibers .passing through said front rolls, applying a substantially constant braking force to said spandex yarn ahead of said front rolls independently of the tension produced in said spandex yarn and independently of the speed of travel thereof and thereby producing and maintaining a substantially uniform state of elastic elongation in said spandex yarn as said spandex yarn reaches said front rolls, and driving said rolls and said bobbin to draw said staple fibers and to wrap said staple fibers about said spandex yarn as said staple fibers and said spandex yarn pass from said front rolls to said bobbin.
- the method of producing an elastic spandex coreyarn on a yarn manufacturing frame having rolls including front rolls, and a spindle having a bobbin thereon comprising the steps of: passing a ribbon of staple fibers through said front rolls and thence to said bobbin, withdrawing a substantially untensioned spandex elastomeric yarn from a supply thereof and feeding said spandex yarn to said front rolls and to said ribbon of staple fibers passing through said front rolls, providing a wheel and passing said spandex yarn about said wheel to drive the same as said spandex yarn passes from said supply to said front rolls, applying a substantially constant braking force to said wheel independently of the tenison of said spandex yarn and independently of the speed of rotation of said wheel and thereby stretching said spandex yarn and producing and maintaining a substantially uniform state of elastic elongation in said spandex yarn as said elastorneric yarn reaches said front rolls, driving said rolls and said bobbin to draw said staple fibers and to wrap said staple fibers about said spandex yarn
- the method of producing an elastic spandex coreyar-n on a yarn manufacturing frame having rolls including front rolls, and a spindle having a bobbin thereon comprising the steps of: passing a ribbon of staple fibers through said front rolls and thence to said bobbin, withdrawing a substantially untensioned spandex elastomeric yarn from a supply thereof and feeding said spandex yarn to said front rolls and to said ribbon of staple fibers passing through said front rolls, providing a wheel and passing said spandex yarn about said wheel to drive the same as said spandex yarn passes from said supply to said front rolls, applying a substantially constant magnetic drag to said wheel and thereby stretching said spandex yarn and producing and maintaining a substantially uniform state of elastic elongation in said spandex yarn as said spandex yarn reaches said front rolls, driving said rolls and said bobbin to draw said staple fibers and to wrap said staple fibers about said spandex yarn as said staple fibers and said spandex yarn pass from said front roll to said bobbin, and maintaining said state
- the method of producing an elastic spandex core yarn on a yarn manufacturing frame having rolls including front rolls, and a spindle having a bobbin thereon comprising the steps of: passing a ribbon of staple fibers through said front rolls and thence to said bobbin, withdrawing a substantial-1y untensioned spandex elastomeric yarn from a supply thereof and feeding said spandex yarn along a path of substantial length to said front rolls and to said ribbon of staple fibers passing through said front rolls and causing any momentary elastic elongations of said spandex yarn produced by irregular release of said spandex yarn from said supply to be distributed substantially throughout the length of said spandex yarn in said path, thereby to minimize and render substantially inconsequential the degree of any said momentary elongations in each longitudinal segment of said spandex yarn in said path, providing a wheel adjacent said path and passing said spandex yarn about said Wheel to drive the same as said spandex yarn passes along said path from said supply to said front rolls, applying a substantially constant magnetic drag to said wheel
- the method of producing an elastic spandex coreyarn on a yarn manufacturing frame having rolls including front rolls, and a spindle having a bobbin thereon comprising the steps of: passing a ribbon of staple fibers through said front rolls and thence to said bobbin, withdrawing substantially untensioned spandex elastomeric yarn from a supply thereof and feeding said spandex yarn along a path at least thirty inches in length to said front rolls and to said ribbon of staple fibers passing through said front rolls and causing momentary elastic elongations of said spandex yarn produced by irregular release of said spandex yarn from said supply to be distributed substantially throughout the length of said spandex yarn in said path, thereby to minimize and render substantially inconsequential the degree of any said momentary elongations in each longitudinal segment of said spandex yarn in said path, providing a wheel adjacent said path and passing said spandex yarn about said wheel to drive the same as said spandex yarn passes along said path from said supply to said front rolls, applying a substantially constant magnetic drag to said wheel
- the method of producing an elastic spandex core spun yarn on a spinning frame having drawing rolls including front rolls, a spindle having a bobbin thereon, and a ring and traveler comprising the steps of: passing a ribbon of staple fibers through said drawing rolls and through said traveler to said bobbin, feeding a spandex yarn from a supply thereof to said front rolls and to said ribbon of staple fibers passing through said front rolls, applying a substantially constant braking force to said spandex yarn ahead of said front rolls independently of the tension of said spandex yarn and independently of the speed of travel thereof and thereby producing and maintaining a substantially uniform state of elastic elongation of said spandex yarn as said spandex yarn reaches said front rolls, driving said rolls and said bobbin to draw said staple fibers and to spin said staple fibers about said spandex as said staple fibers and said spandex yarn pass from said front rolls and through said traveler to said bobbin, and controlling the speed of said front rolls and said bobbin to maintain the heat of friction below 200 F.
- the method of producing an elastic spandex coreyarn on a spinning frame having drawing rolls including front rolls, and a spindle having a bobbin thereon comprising the steps of: passing a ribbon of staple fibers through said drawing rolls and thence to said bobbin, withdrawing a spandex elastomeric yarn in a substantially untensioned condition from a stationary spool thereof in a direction generally axially of the spool and thereby twisting said spandex yarn in a first direction, feeding said spandex yarn from said supply thereof to said front rolls and to said ribbon of staple fibers passing through said front rolls, applying a substantially constant braking force to said spandex yarn ahead of said front rolls independently of the tension of said spandex yarn and independently of the speed of travel thereof and thereby producing and maintaining a substantially uniform state of elastic elongation in said spandex yarn as said spandex yarn reaches said front rolls, driving said rolls and said bobbin to spin said staple fibers about said spandex yarn in a direction opposite said first direction
- the method of producing an elastic spandex coreyarn on a yarn manufacturing frame having a pair of rolls, a spindle having a bobbin thereon, and a ring and traveler comprising the steps of: passing -a ribbon of staple fibers through said rolls and through said traveler to said bobbin, Withdrawing a substantially untensioned spandex yarn from a supply thereof and feeding said spandex yarn to said rolls and to said ribbon of staple fibers passing through said rolls, applying a substantially constant braking force to said spandex yarn ahead of said rolls independently of the tension of said spandex yarn and independently of the speed of travel thereof and thereby producing and maintaining a substantially uniform state of elastic elongation of said spandex yarn as said spandex yarn reaches said rolls, driving said rolls and said bobbin to Wrap said staple fibers about said spandex yarn as said staple fibers and said spandex yarn pass from said rolls and through said traveler to said bobbin, and controlling the speed of said rolls and said bobbin to maintain the heat of friction
- the method of producing an elastic spandex core spun yarn on a yarn manufacturing frame having a pair of driven rolls, a spindle having a bobbin thereon, and a ring and traveler comprising the steps of: passing a ribbon of staple fibers through said driven rolls and through said traveler to said bobbin, withdrawing a spandex yarn from a stationary spool thereof in a direction generally axially of the spool and thereby twisting said spandex yarn in a first direction, directing said withdrawn spandex yarn from said supply along a path of substantial length to said driven rolls and causing momentary elastic elongations of said spandex yarn produced by irregular release of said spandex yarn from said spool to be distributed substantially throughout the length of said spandex yarn in said path, thereby to minimize and render substantially inconsequential the degree of any said momentary elongations in each longitudinal segment of said spandex yarn in said path, providing a wheel adjacent said path -and passing said spandex yarn around at least a portion of
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- 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)
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE659749D BE659749A (it) | 1964-02-13 | ||
US344711A US3323302A (en) | 1964-02-13 | 1964-02-13 | Method for producing yarn |
GB16976/64A GB1068388A (en) | 1964-02-13 | 1964-04-23 | Method and apparatus for producing stretch yarn |
SE5331/64A SE309001B (it) | 1964-02-13 | 1964-04-29 | |
ES0299296A ES299296A1 (es) | 1964-02-13 | 1964-04-29 | Un metodo de producir un hilo con nucleo clasico |
NL6404830A NL6404830A (it) | 1964-02-13 | 1964-05-01 | |
ES0302682A ES302682A1 (es) | 1964-02-13 | 1964-07-31 | UN APARATO PARA PRODUCIR UN HILO CON NUCLEO ELáSTICO |
CH191665A CH445348A (de) | 1964-02-13 | 1965-02-12 | Verfahren und Vorrichtung zum Herstellen eines Garnes, das eine elastomere Seele enthält |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US344711A US3323302A (en) | 1964-02-13 | 1964-02-13 | Method for producing yarn |
Publications (1)
Publication Number | Publication Date |
---|---|
US3323302A true US3323302A (en) | 1967-06-06 |
Family
ID=23351675
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US344711A Expired - Lifetime US3323302A (en) | 1964-02-13 | 1964-02-13 | Method for producing yarn |
Country Status (7)
Country | Link |
---|---|
US (1) | US3323302A (it) |
BE (1) | BE659749A (it) |
CH (1) | CH445348A (it) |
ES (2) | ES299296A1 (it) |
GB (1) | GB1068388A (it) |
NL (1) | NL6404830A (it) |
SE (1) | SE309001B (it) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3385044A (en) * | 1966-08-09 | 1968-05-28 | Maremont Corp | Textile strand-spinning apparatus |
US3489368A (en) * | 1967-10-17 | 1970-01-13 | Barber Colman Co | Tension regulator for stretch core thread |
US3848785A (en) * | 1973-05-14 | 1974-11-19 | J Bott | Ski rack for motor vehicles |
US5701729A (en) * | 1995-06-06 | 1997-12-30 | Dixie Yarns, Inc. | System for forming elastomeric core/staple fiber wrap yarn using a spinning machine |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3316266A1 (de) * | 1983-05-04 | 1984-11-08 | Bayer Ag, 5090 Leverkusen | Elastisches flachgewebe und seine herstellung |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2036778A (en) * | 1934-07-26 | 1936-04-07 | Adolph E Schenck | Hiding core thread in yarn |
US2076271A (en) * | 1935-09-12 | 1937-04-06 | Harris Textile Machinery Corp | Covered elastic thread |
US2210884A (en) * | 1939-02-11 | 1940-08-13 | Us Rubber Co | Method of making elastic yarn |
US2293748A (en) * | 1941-10-29 | 1942-08-25 | William J Johnson | Magnetic brake |
US2519882A (en) * | 1948-04-30 | 1950-08-22 | Gen Electric | Constant torque device |
US2724065A (en) * | 1951-03-30 | 1955-11-15 | Erwin J Saxl | Magnetic drag for control of yarn tension |
US2768796A (en) * | 1954-08-12 | 1956-10-30 | Levine Paul | Magnetic thread-tensioners |
US2895286A (en) * | 1958-06-12 | 1959-07-21 | Richard A O'connell | Preparation of bulky textiles |
US3022565A (en) * | 1958-09-04 | 1962-02-27 | Chemstrand Corp | Method of texturing yarns |
GB908112A (en) * | 1959-02-20 | 1962-10-17 | Klinger Mfg Co Ltd | Improvements in or relating to yarn controlling devices |
US3092953A (en) * | 1960-08-01 | 1963-06-11 | Bear Brand Hosiery Co | Method and apparatus for forming yarn |
US3115745A (en) * | 1962-06-13 | 1963-12-31 | Chadbourn Gotham Inc | Method of drawing, covering and stabilizing synthetic elastomeric yarn |
-
0
- BE BE659749D patent/BE659749A/xx unknown
-
1964
- 1964-02-13 US US344711A patent/US3323302A/en not_active Expired - Lifetime
- 1964-04-23 GB GB16976/64A patent/GB1068388A/en not_active Expired
- 1964-04-29 SE SE5331/64A patent/SE309001B/xx unknown
- 1964-04-29 ES ES0299296A patent/ES299296A1/es not_active Expired
- 1964-05-01 NL NL6404830A patent/NL6404830A/xx unknown
- 1964-07-31 ES ES0302682A patent/ES302682A1/es not_active Expired
-
1965
- 1965-02-12 CH CH191665A patent/CH445348A/de unknown
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2036778A (en) * | 1934-07-26 | 1936-04-07 | Adolph E Schenck | Hiding core thread in yarn |
US2076271A (en) * | 1935-09-12 | 1937-04-06 | Harris Textile Machinery Corp | Covered elastic thread |
US2210884A (en) * | 1939-02-11 | 1940-08-13 | Us Rubber Co | Method of making elastic yarn |
US2293748A (en) * | 1941-10-29 | 1942-08-25 | William J Johnson | Magnetic brake |
US2519882A (en) * | 1948-04-30 | 1950-08-22 | Gen Electric | Constant torque device |
US2724065A (en) * | 1951-03-30 | 1955-11-15 | Erwin J Saxl | Magnetic drag for control of yarn tension |
US2768796A (en) * | 1954-08-12 | 1956-10-30 | Levine Paul | Magnetic thread-tensioners |
US2895286A (en) * | 1958-06-12 | 1959-07-21 | Richard A O'connell | Preparation of bulky textiles |
US3022565A (en) * | 1958-09-04 | 1962-02-27 | Chemstrand Corp | Method of texturing yarns |
GB908112A (en) * | 1959-02-20 | 1962-10-17 | Klinger Mfg Co Ltd | Improvements in or relating to yarn controlling devices |
US3092953A (en) * | 1960-08-01 | 1963-06-11 | Bear Brand Hosiery Co | Method and apparatus for forming yarn |
US3115745A (en) * | 1962-06-13 | 1963-12-31 | Chadbourn Gotham Inc | Method of drawing, covering and stabilizing synthetic elastomeric yarn |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3385044A (en) * | 1966-08-09 | 1968-05-28 | Maremont Corp | Textile strand-spinning apparatus |
US3489368A (en) * | 1967-10-17 | 1970-01-13 | Barber Colman Co | Tension regulator for stretch core thread |
US3848785A (en) * | 1973-05-14 | 1974-11-19 | J Bott | Ski rack for motor vehicles |
US5701729A (en) * | 1995-06-06 | 1997-12-30 | Dixie Yarns, Inc. | System for forming elastomeric core/staple fiber wrap yarn using a spinning machine |
Also Published As
Publication number | Publication date |
---|---|
CH445348A (de) | 1967-10-15 |
ES302682A1 (es) | 1965-01-01 |
ES299296A1 (es) | 1964-12-01 |
NL6404830A (it) | 1965-08-16 |
GB1068388A (en) | 1967-05-10 |
BE659749A (it) | |
SE309001B (it) | 1969-03-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PARAMOUNT SOUTHERN CO. Free format text: CHANGE OF NAME;ASSIGNOR:PARAMOUNT TEXTILE MACHINERY CO.;REEL/FRAME:003848/0886 Effective date: 19801119 Owner name: PARAMOUNT TEXTILE MACHINERY COMPANY, A CORP. OF NC Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PARAMOUNT SOUTHERN CO.;REEL/FRAME:003848/0889 Effective date: 19801125 Owner name: PARAMOUNT SOUTHERN CO., VIRGINIA Free format text: CHANGE OF NAME;ASSIGNOR:PARAMOUNT TEXTILE MACHINERY CO.;REEL/FRAME:003848/0886 Effective date: 19801119 |