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Publication numberUS3756005 A
Publication typeGrant
Publication dateSep 4, 1973
Filing dateMar 24, 1972
Priority dateMar 24, 1972
Publication numberUS 3756005 A, US 3756005A, US-A-3756005, US3756005 A, US3756005A
InventorsSeguin P
Original AssigneeChavanoz Sa
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Process and apparatus for forming novelty effect yarns
US 3756005 A
Abstract
A process for producing a novelty effect yarn having stable protuberances along the length thereof including feeding core and effect yarns to a friction false twist assembly along spaced, substantially parallel paths, the effect yarn having an irregular undulation and undergoing a sudden change in direction from the spaced path to a junction point with the core yarn, the junction point being spaced upstream from the friction element of the friction false twist assembly and the distance between the junction point and the friction element varying. Apparatus for implementing the above process including a nozzle for projecting a fluid stream to move the effect yarn along a spaced, substantially parallel path relative to the core yarn.
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Description  (OCR text may contain errors)

United States Patent 1 Seguin 1 Sept. 4, 1973 [75] Inventor: Pierre Seguin, Chavanoz, France [73] Assignee: Chavanoz S.A., Chavanoz, France [22] Filed: Mar. 24, 1972 [21] Appl. No.: 237,823

[52] US. Cl. 57/34 R, 28/72.12, 57/34 B, 57/91, 57/157 R, 57/157 F [51] Int. Cl D0lh 7/92, D0lh 13/10, D02g 3/34 [58] Field of Search 57/34 R, 34 B, 5l51.6, 57/77.377.45, 156, 157 R, 157 F, 160, 90, 91,106,140 BY; 28/].3, 1.4, 72.11, 72.12

11/1970 Tanaka et a1. 57/51 X 8/1972 Sequin 57/34 R Pr me m n rfppne d ki Attorney- Leonard W. Sherman. Edwin A. Shalloway et a1.

[57] ABSTRACT A process for producing a novelty effect yarn having stable protuberances along the length thereof including feeding core and effect yarns to a friction false twist assembly along spaced, substantially parallel paths, the effect yarn having an irregular undulation and undergoing a sudden change in direction from the spaced path to a junction point with the core yarn, the junction point being spaced upstream from the friction element of the friction false twist assembly and the distance between the junction point and the friction element varying. Apparatus for implementing the above process including a nozzle for projecting a fluid stream to move the effect yarn along a spaced, substantially parallel path relative to the core yarn.

17 Claims, 4 Drawing Figures PROCESS AND APPARATUS FOR FORMING NOVELTY EFFECT YARNS BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention pertains to effect yarns and, more particularly, to a process and apparatus for forming novelty effect yarns having protuberances thereon, such as flake or flame yarns and the like.

2. Discussion of the Prior Art The manufacture of novelty effect yarns with protuberances has been primarily implemented with the use of spinning apparatus called throwers wherein at least two yarns are assembled, one of which is referred to as a core yarn and is covered by the other which is referred to as an effect yarn. The effect yarn is fed in excess at a faster rate either regularly or irregularly with respect to the feeding of the core yarn in order to achieve the desired effect, which effect is generally stabilized and fixed by the application of a third yarn referred to as a binder. While the above described process provides slubbed yarns with a stable effect, the process has the disadvantage of being complex due to the necessity of utilizing a binder yarn and further can operate only at a low rate in that the throwers are not operable at a speed in excess of 20 meters per minute.

Several solutions to the above described disadvantages have been proposed recently. Thus, in U. S. Pat. No. 3,508,389 a process is proposed wherein a novelty effect yarn is manufactured by false twist assembly of a core yarn and an effect yarn fed in excess with respect to the core yarn, and the effect is stabilized by means of a binder yarn applied during the false twist operation. This process has the disadvantage of being relatively expensive due primarily to the requirement of the use of the binder yarn. In French Pat. No. 2,043,462 a process is proposed wherein a novelty effect yarn is manufactured by false twist assembly by friction of at least two yarns or slivers, at least one of which is fed in excess with respect to the other. While this process permits the production of slubbed novelty yarns at high speeds, the yarns produced thereby have the disadvantage of lacking effect stability.

In U. S. Patent application Ser. No. 188,776 filed Oct. 13, 1971, by applicant and entitled Effect Yarn And Process For Forming The Same, it is proposed to produce a novelty effect yarn characterized in at least one length having alternated helicoidal curls or crimps by a process wherein at least two yarns are false twist friction assembled with one of the yarns fed in excess with respect to the other yarn. The process is particularly characterized in that the two yarns are passed over a friction element and the point ofjunction of the yarns freely oscillates between two positions upstream of the friction element. While such process is extremely advantageous and represents an improvement over the prior art, such process does not yield novelty effect yarns having substantially stable protuberances since the two yarns can be separated after treatment.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a process and apparatus for forming novelty effect yarns having stable protuberances along their length at high speeds without the use of a binder yarn.

The present invention is generally characterized in a process for producing a novelty effect yarn having stable protuberances along the length thereof including feeding a core yarn to a friction false twist assembly along a first path, feeding at least one effect yarn to the friction false twist assembly under low tension at a rate in excess of the feeding rate of the core yarn along a second path in spaced substantially parallel relation to the first path, joining the core and effect yarns at a junction point upstream of the friction element of the friction false twist assembly such that the effect yarn undergoes a sudden change in direction from the second path to the junction point, and varying the distance between the junction point and the friction element of the friction false twist assembly. The present invention is further generally characterized in apparatus for implementing the above described process including a yarn supply device for maintaining the spaced substantially parallel relation between the core and effect yarns in the supply zone.

Another object of the present invention is that, in a friction false twist assembly process for forming a novelty effect yarn, an effect yarn is supplied in excess with respect to a core yarn and under very low tension, preferably less than 5 g.

A further object of the present invention is to supply a core yarn and an effect yarn to a friction false twist assembly in substantially the same direction but separate or spaced from each other, the effect yarn undergoing a sudden change of direction just prior to the junction point with the core yarn, the point of junction of the core and effect yarns being spaced from the friction element of the friction false twist assembly by an arbitrarily varying distance.

The present invention has another object in that core and effect yarns are joined prior to delivery to a friction false twist assembly and contact the friction element surfaces of such assembly over a substantial portion of the periphery thereof, the friction element surface being, preferably, toroidal, and the portion or are thereof contacting the joined yarns is between 30 and 120, advantageously close to 90.

It is an additional object of the present invention to maintain the tension of a core yarn supplied to a friction false twist assembly generally between 20 and g for yarns between 78 and 235 dtex, the tension varying with the tites of the core'yam, and to maintain the tension of one or more effect yarns fed in excess with respect to the core yarn at substantially zero, from a practical standpoint generally between 1 and 2.5g and, preferably, less than 5g.

An additional object of the present invention is to supply core and effect yarns to a friction false twist assembly through a supply zone with the yarns separated or spaced from each other during a length of movement dependent upon the nature of the yarns but not less than 5cm. Further, the distance between the point of junction of the core and effect yarns and the friction element of the friction false twist assembly is main tained not less than about 1cm with this distance constantly varying between the 1cm minimum and a maximum of 20cm during operation due to the shifting of the point of junction of the yarns, the frequency of the shifting junction point being random.

The present invention has a further object in that core and effect yarns are spaced upstream of their point of junction prior to application of a firction false twist assembly, the core yarn moving in a straight line and the effect yarn moving with irregular undulation in a general direction that is substantially parallel to the direction of movement of the core yarn but preferably having a tendecny or direction to slightly move away from the core yarn. The separation between the core and effect yarns where they are moving side-by-side is less than 1cm and preferably on the order of 0.5cm, the angle formed by the directions of the two yarns being preferably less than 30.

Another object of the present invention is to provide apparatus for maintaining the spacing of the core and effect yarns with respect to each other and for controlling the change of direction of the effect yarn prior to joining with the core yarn without utilizing mechanically moving elements, and preferably by utilizing fluid flow, particularly air moving parallel to the core yarn and in the same direction and preferably tends to separate slightly the direction of the effect yarn with respect to the direction of the core yarn.

Yet a further object of the present invention is to provide apparatus for manufacturing a novelty effect yarn having protuberances including means for deilvering an effect yarn and a core yarn to a false twist assembly with the effect yarn spaced from the core yarn over a portion of the supply path such that the core and effect yarns both move in substantially the same or parallel directions toward the false twist assembly.

The present invention has an additional object in the provision of a novelty effect yarn having irregular protuberances of the flake yarn type or like, wherein such novelty effect yarn is composed of at least two yarns, one forming the core and the other the effect and being characterized in that between protuberances the effect yarn is slightly twisted and tangled about the core yarn.

Some of the advantages of the present invention over the prior art are that novelty effect yarns may be produced having stable protuberances without sacrificing high speed.

Other objects and advantages of the present invention will become apparent from the following description of the preferred embodiment taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagrammatic illustration of apparatus for forming novelty effect yarns according to the present invention.

FIG. 2 is an enlarged partial diagrammatic view of the twisting, delivery and supply zones of the apparatus of FIG. 1.

FIG. 3 is a longitudinal section of the yarn supply device of the apparatus of FIG. 1.

FIG. 4 is a section taken along line 4-4 of FIG. 3.

DESCRIPTION OF THE PREFERRED EMBODIMENT Apparatus for forming novelty effect yarns in accordance with the present invention is illustrated in FIG. I and includes a friction false twist spindle assembly carrying a friction ring 12 in a twisting zone at one end thereof and a friction ring 14 in an untwisting zone at the opposite end thereof. As is known, the friction false twist spindle assembly 10 is rotated, for instance by means of a belt 16 and has a central passage through which the yarn passes between friction ring 12, which defines a twisting point for a plurality of yarns, and friction ring 14, which defines an untwisting point for the yarns.

A core yarn 18 is supplied from a bobbin 20 through a pigtail guide 22 to a rotary or friction tensioning device 24; and, after passing around the tensioning device 24, the core yarn 18 is supplied through a guide 26 to be delivered through delivery and supply zones to friction ring 12 in a substantially straight path. An effect yarn 28 is supplied from a bobbin 30 through a pigtail guide 32 to a delivery device 34 composed of a pair of rollers having their rotational speed regulated to control the rate of delivery of the effect yarn 28. From the delivery device 24 the effect yarn 28 is supplied to a yarn supply device 36 which has fluid, such as air under high pressure, supplied to an inlet 38 thereof. Yarn supply device 36 has an outlet 40 spaced from guide 26, and the effect yarn 28 is delivered from the outlet 40 through delivery and supply zones to the friction element 12. The effect yarn 28 travels over a varying supply zone distance I. in a direction substantially parallel to the path of travel of the core yarn 18 and suddenly changes direction at 41 to join core yarn 18 at a junction point J which is spaced from the friction ring 12 by a varying delivery zone distance L The core and effect yarns are twisted at friction ring 12, moved through a central passage in the friction false twist assembly 10 and untwisted as they exit from friction ring 14 to be moved past guide elements such as rollers 42 and 44 prior to being wound on a spool 46 rotated by a driving roller 48 as a novelty effect yarn with stable protuberances along its length.

The yarn supply device 36 is illustrated in FIG. 3 and includes a generally cylindrical nozzle 49 having a small diameter bore 50 receiving air from inlet 38 and communicating with a coaxial bore 52 having a larger diameter than the diameter of bore 50. The effect yarn 28 enters the nozzle 36 at the junction of bores 50 and 52 through an aperture 54 such that the expansion of the compressed air flowing through bore 50 aids in the movement of the effect yarn. As the effect yarn exists from outlet 40 along with the air, the effect yarn is held away from the core yarn over the supply zone length L, such that the effect yarn experiences a sudden change of direction at 41 when it joins the core yarn at junction J and experiences undulating, irregular movement in the supply zone. The fore 50 preferably has a diameter of between 0.5 and 1.5 mm, and the diameter of bore 52 is preferably at least twice that of bore 50. The length of each of bores 50 and 52 is preferably between 1 and 5 cm, and the air pressure required, which may be adjustable by anywell known device, may be maintained low and need not exceed 2 kilograms per centimeter square, the air flowing through nozzle 49 having a substantially laminar pattern.

Preferably, the core yarn guide 26 is integrally formed with nozzle 49 such that the yarn supply device controls the delivery of the core and effect yarns relative to each other; and, as illustrated in FIGS. 3 and 4, the guide 26 is advantageously secured to the nozzle 49 by means of a bolt 56 mounted on the guide 26 and extending through a slot 58 in a bracket 60, which is fixed to nozzle 49, to engage a nut 62 such that the nozzle and guide can be rotatably adjusted relative to each other whereby the effect yarn can be provided with an initial direction slightly away from the path of the core yarn and such that the spacing between the core and effect yarns over the supply zone portion L, can be adjusted. The specific structure of yarn supply device 36, as described above, is for exemplary purposes only, and

it will be appreciated that nozzle 49 can have any desirable configuration. for instance with a bore therethrough having a uniform diameter over its entire length and for the effect yarns being delivered to the nozzle at the same orifice as the air. The design feature of the yarn supply device that is of primary importance is that the air flow substantially parallel to the path of travel of the core yarn; that is, the axis of the nozzle should be maintained substantially parallel or only slightly divergent with respect to the core yarn.

The forming of the novelty effect yarn in accordance with the present invention will be better understood with reference to FIG. 2 which is an enlarged view of the delivery and supply zones and friction ring 12 of the friction false twist assembly of F IG. 1. The effect yarn 28 is overfed or fed in excess with respect to the core yarn l8, and the flow of air from nozzle 49 indicated by arrows 64 holds the effect yarn in spaced position from the core yarn through the supply zone L As the force of the flow of air is dissipated, the effect yarn -28 undergoes a substantial 90 change in direction at 41 to join with the core yarn 18 at junction point J spaced a distance L; from a friction ring 12 corresponding to the delivery zone. Since the effect yarn 28 is held freely by the air stream exiting from nozzle 49, the junction point J of the core and effect yarns will be unstable due to the variances between the force of the air stream and the force created by the twist imposed by rotation of the friction ring 12. Accordingly, the junction point J of the core and effect yarns will shift periodically to vary the lengths L and L of the delivery and supply zones thereby permitting the effect yarn 28 to form loops around the core yarn 18 of varying sizes and configurations. The loops, as clearly shown in FIG. 2, roll and twist both with respect to each other and on the core yarn as the core and effect yarns pass over friction ring 12 thereby forming irregular protuberances stably fixed 0n the core yarn.

At the point 41 where the effect yarn 28 undergoes a sudden change of direction to join the core yam 18, the effect yarn 28 tends to diverge slightly from the direction or path of travel of core yarn 18 as indicated at 66. Furthermore, for some applications it is desirable to orient the air flow 64 to move the effect yarn 28 in a direction slightly diverging from the direction of the core yarn 18, such orientation of the air flow being easily affected by loosening nut 62 and slightly turnlng nozzle 49 and guide 26 relative to each other. Of course, it will be appreciated that either nozzle 49 or guide 26 may be maintained stationary with the other being rotatable and slidable relative thereto.

The supply zone length L, is advantageously maintained greater than cm. and the minimum length L, for the delivery zone should be maintained at 1cm. with L varying between the minimum of- 1cm. and a maximum of 20cm. as the junction point J shifts.

The angle of the sudden change of direction at 41 through which the effect yarn passes is between 60 and 100 and, accordingly, it will be appreciated that the expression sudden change in direction with reference to the effect yarn is meant to encompass this range. It has been stated above that the core and effect yarns are moved through the supply zone in substantially the same direction or in substantially parallel paths, however, it should be understood that the paths or directions of the core and effect yarns preferably tend to diverge slightly from each other; the angle between the core and effect yarns being less than and. preferably, less than 30.

The process and product of the present invention will now be described in connection with the following example, which example is presented for purposes of illustration only; and the present invention is in no way to be deemed as limited thereto.

EXAMPLE A novelty effect yarn is produced utilizing the apparatus of FIG. 1 with the delivery device for the effect yarn being a compressed air nozzle whose characteristics are as follows:

length of bore 50: 2 cm diameter of bore 50: l.5cm

length of bore 52: 2cm

diameter of bore 52: 2.5 mm

For the core yarn, there is used a polyhexamethylene adipamide yarn, 233 dtex, 34 strands, 20 Z twists per meter.

For the effect yarn, there is used a polyhexamethylene adipamide yarn, 33 dtex, 28 strands, 20 Z twists per meter.

Operating conditions are as follows:

tension of core yarn 70 g tension of effect yarn l 2 g winding speed 195' m/min excess feed as determined by Length of effect yarn/ Length of core yarn X speed of rotation of the friction false twist assembly spindle 15,000 rpm direction of rotation of the pin S air pressure 2kg/crn minimal distance L, between the junction point 1 of the core and effect yarns and the friction element surface 5 cm minimal distance L, between the junction point J of the core and effect yarns and the nozzle 10 cm distance between nozzle and friction element 25cm spacing between the core yarn and the effect yarn at the outlet of the nozzle 0.5 cm

path of the core and effect yarns substantially parallel at the nozzle outlet.

The yarn produced had the form of a novelty effect yarn with protuberances formed by the effect yarn firmly bound to the core yarn, the effect yarn between two protuberances being tangled and twisted about the core yarn.

From the above it will be appreciated that in accordance with the present invention a novelty effect yarn may be manufactured'at extremely high speeds without requiring a binder yarn to stabilize protuberances along its length in that the core and effect yarns are moved along spaced paths prior to their point of junction, the core yarn moving in a straight line and the effect yarn moving with an irregular undulation in a general direction substantially parallel to that of the core yarn. Advantageously, the general direction or path of travel of the effect yarn slightly diverges or has a tendency to move away from the direction of the core yarn. The spacing or separation between the core and effect yarns where they exit from the yarn supply device 36 is normally less than 1cm and preferably on the order of 0.5cm.

The apparatus according to the present invention maintains the spacing between the core and effect yarns in the supply zone and permits the sudden change of direction of the effect yarn prior to joining with the core yarn without requiring mechanical elements or otherwise contacting the yarns by establishing the undulating path for the effect yarn by means of a fluid stream, preferably air, moving parallel to the core yarns and in the same direction, preferably slightly diverging from the direction of the core yarn.

The combination core and effect yarns should contact a major portion of the surface of the friction element as previously explained; and, consequently, the angle formed by the longitudinal axis of rotation of the friction false twist assembly spindle and the longitudinal axis of the yarn supply device should be maintained between 60 and 100, preferably about 90. While the longitudinal axis of rotation of the friction false twist assembly spindle has been illustrated as being vertical, such spindle may be disposed with its longitudinal axis horizontal in which case the yarn supply device will have its longitudinal axis disposed vertically with the fluid flow therethrough being preferably from top to bottom.

The novelty effect yarn produced by the apparatus and process of the present invention may be varied by adjusting the pressure of fluid supplied to the yarn supply device in that since the pressure required for adequate fluid flow is small, the adjustment thereof permits the increasing or decreasing of the length L, of the supply area during which the core and effect yarns are spaced from each other.

Inasmuch as the present invention is subject to many variations, modifications and changes in detail, it is intended that all matter described above or shown in the accompanying drawings by interpreted as illustrative and not in a limiting sense.

What is claimed is: g

l. A process for producing a novelty effect yarn having stable protuberances along the length thereof comprising the steps of feeding a core yarn to a friction false twist assembly through a supply zone along a first path;

feeding at least one effect yarn to the friction false twist assembly under low tension at a rate in excess of the feed rate of the core yarn through the supply zone along a second path in spaced, substantially parallel relation to the first path;

joining the core and effect yarns at a junction point upstream of the friction element of the friction false twist assembly such that the effect yarn undergoes a sudden change in direction from the second path to the junction point; and

varying the distance between the junction point and the friction element of the friction false twist assembly.

2. The process as recited in claim 1 wherein said effect yarn feeding step includes feeding the effect yarn at a tension less than 5g. and at a rate greater than 150 percent in excess of the feeding rate of the core yarn.

3. The process as recited in claim 1 wherein the first and second paths diverge slightly before the sudden change in direction of the effect yarn.

4; The process as recited in claim 3 wherein the first and second paths in the supply zone are spaced by a distance on the order of 0.5cm;

5. The process as recited in claim 1 wherein the sudden change of direction of the effect yarn is through an angle from 60 to 120.

6. The process as recited in claim I wherein the core and effect yarns are spaced in the supply zone along a distance of at least 10cm. and the distance between the junction point and the friction element of the friction false twist assembly is maintained greater than 1cm.

7. The process as recited in claim I wherein said core yarn feeding step includes moving the core yarn along the first path in a straight line and said effect yarn feeding step includes moving the effect yarn along the second path with irregular undulations.

8. The process as recited in claim 7 wherein said effect yarn feeding step includes carrying the effect yarn along the second path with a fluid stream.

9. The process as recited in claim 8 wherein the fluid stream is directed in parallel with the first path of the core yarn through the supply zone.

10. The process as recited in claim 8 wherein the fluid flow is directed at a slight angle away from the core yarn.

11. Apparatus for forming a novelty effect yarn having stable protuberances along the length thereof comprising a friction false twist assembly carrying a friction element;

core yarn delivery means for supplying a core yarn at a first rate to said friction element of said friction false twist assembly;

effect yarn delivery means for supplying at least one effect yarn at a second rate greater than said first rate to said friction element of said friction false twist assembly; and

yarn supply means disposed between said effect and core yarn delivery means and said friction element of said friction false twist assembly for moving said effect and core yarns along substantially parallel, spaced paths through a supply zone to a parallel, spaced paths through a supply zone to a junction point for the core and effect yarns spaced from said friction element of said friction false twist assembly.

12. The apparatus as recited in claim 1 1 wherein said yarn supply means includes nozzle means directing a fluid stream along the path for said effect yarn to main tain said effect yarn spaced from said core yarn in the supply zone.

13. The apparatus as recited in claim 12 wherein said nozzle means has a bore extending therethrough and air is forced through said bore.

14. The apparatus as recited in claim 13 wherein said nozzle means has an aperture therein to receive said effect yarn and an outlet through which said fluid stream and said effect yam are directed.

15. The apparatus as recited in claim 14 wherein said yarn supply means includes a guide for said core yarn connected with said nozzle means.

16. The apparatus as recited in claim 15 wherein said yarn supply means includes adjustable support means interconnecting said nozzle means and said guide for varying the spacing and rotational orientation therebetween.

17. The apparatus as recited in claim 1 1 wherein said friction false twist assembly has a longitudinal axis of rotation and said yarn supply means has a longitudinal axis disposed at an angle between 60 and relative to said longitudinal axis of rotation of said friction false twist assembly.

i I II i UNITED 'STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No- 3 756 ,005 Dated September 4, 1973 Invent Pierre Seguin It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 8, line 36: delete "parallel,"

Column 8, line 37: delete "spaced paths through a supply zone toll Signed and sealed this 18th day of December 1973.

(SEAL) Attest:

EDWARD M. FLECTHER, JR. RENE D. TEGTMEYER Attesting Officer Acting Commissioner of Patents ".1. vb-T330 (10-50;

qscuM -u; Goals-Poe n us. coygm uzu r rngrinuc OFFICE was (tr-365d): -1 x UNITED STATES PATENT OFFICYE CERTIFICATE OF CORRECTION Patent No. 3,756,005 Dated September 4, 1.973

Inventor Pierre Seguin It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

In the heading, insert:

-- Claims priority, application France,

filed March'25, 1971, No. 71/ 10849 Signed and sealed this 19th day of March 1974.

(SEAL) Attest:

EDWARD M.PLETCHER,JR. C. MARSHALL DANN Attesting Officer Commissioner of Patents

Patent Citations
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3914930 *Aug 9, 1973Oct 28, 1975Ici LtdMethod of manufacturing variable knop yarn
US3928958 *Oct 29, 1974Dec 30, 1975Asahi Chemical IndMethod for producing spun yarn-like bulked yarns
US4069656 *Jun 30, 1975Jan 24, 1978Toyo Boseki Kabushiki KaishaComposite spun yarn and process for producing the same
US4223520 *Dec 20, 1977Sep 23, 1980Poinsett Machine Works, Inc.Method and apparatus for bulking yarn
US4311000 *Aug 29, 1979Jan 19, 1982Burlington Industries, Inc.Novelty yarn production
US4453297 *Jul 29, 1981Jun 12, 1984Burlington Industries, Inc.Novelty yarn production
USRE31808 *Feb 4, 1983Jan 22, 1985Burlington Industries, Inc.Novelty yarn production
EP0057015A2 *Jan 26, 1982Aug 4, 1982Institut Po Obleklo I TextilMethod and device for the manufacturing of an effect yarn
Classifications
U.S. Classification57/6, 28/252, 57/91, 57/350, 57/207
International ClassificationD02G3/34
Cooperative ClassificationD02G3/34, D02G3/343
European ClassificationD02G3/34B, D02G3/34