US3717959A

US3717959A - Process for producing fancy effect yarns

Info

Publication number: US3717959A
Application number: US00114185A
Authority: US
Inventors: R Chatin
Original assignee: Moulinage et Retorderie de Chavanoz SA
Current assignee: Moulinage et Retorderie de Chavanoz SA
Priority date: 1971-02-10
Filing date: 1971-02-10
Publication date: 1973-02-27
Anticipated expiration: 1990-02-27

Abstract

An improved process and product obtained thereby for the production of fancy effect yarns such as chenille yarns, boucle or loop yarns, flame or flake yarns, etc., which comprises overfeeding at least one effect yarn in relation to at least one core yarn, twisting the effect and core yarns to form an intermediate yarn, twisting the intermediate yarn prior to the blocking of the twist, binding the intermediate yarn with a binding yarn upon the blocking of the twist to form a fancy yarn and taking up the fancy yarn.

Description

[ 1 Feb. 27, 1973 United States Patent [191 Chatin .57/16 Na1pas............,.........................57/12 4/1970 3/1971 3,439,484 4/1969 Nalpas et 3,445,994 5/ 1 969 1 PROCESS FOR PRODUCING FANCY EFFECT YARNS [75] Inventor: Remy Chatin, Chavanoz, France Nalpas et a1.......r......................57/l6 [73] Assignee: Moulinage Et Retorderic Chavanoz, Chavanoz, France Feb. 10, 1971 [21] Appl. No.: 114,185

Primary Examiner-Donald E. Watkins Attorney-Sherman and Shalloway [22] Filed:

[57] ABSTRACT An improved process and product obtained thereby I for the production of fancy effect yarns such as chenille yarns, boucle or loop yarns, flame or flake yarns, etc., which comprises overfeeding at least one effect yarn in relation to at least one core yarn, twist- [58] Field 0fSearch..................57/12,13,14, 16-18, 57/24, 34, 3,51, 156,160

ing the effect and core yarns to form an intermediate yarn, twisting the intermediate yarn prior to the [56] References Cited UNITED STATES PATENTS blocking of the twist, binding the intermediate yarn with a binding yarn upon the blocking of the twist to form a fancy yarn and taking up the fancy yarn.

...57/l60 .............57/16 12/1940 Wa1sh.....,.................................57/16 7 Claims, 5 Drawing Figures 2,309,095 H1943 2,302,543 11/1942 Gift et a1. 2,224,110

snag

PROCESS FOR PRODUCING FANCY EFFECT YARNS CROSS-REFERENCE TO RELATED PATENTS AND APPLICATIONS Cross-reference is made to US. Pat. No. 3,508,389 and the following co-pending U.S. applications: Ser. No. 49,815 filed June 25, I970, nowpending and Ser. No. 99,536 filed Dec. 17, 1970, now abandoned.

BACKGROUND OF THE INVENTION This invention relates to a process for producing fancy yarns such as loop or boucle yarns, flame or flake yarns, chenille yarns, knop yarns, etc., and also for the yarns producedby this process.

Fancy effect yarns are often manufactured by overfeeding one yarn with respect to another, i.e., delivering different yarns at different speeds, followed by twisting these yarns together, or by intermittently yarn. This composite yarn is then bound on a similar device carryinga so-called binding yarn. Also prior art processes attempted to manufacture fancy effect yarns in a single operation by a false twist assembling of two yarns, one of which is overfed with respect to the other and binding these yarns at the moment of the locking of the false twist. In these processes the false twist device is mounted on a rotating guide element or disc mounted at the end of the spindle carrying the binding yarn spool. These guide elements or rigid discs are generally mounted so that they freely rotate. None of the above processes, however, are suitable for the production of certain types of effect yarns, which require a substantial effect-producing twist.

Briefly, it has been found that fancy effect yarns may be produced by overfeeding at least one effect yarn in relation to at least one core yarn, twisting the core and effect yarns to form an intermediate yarn, imparting an additional twist prior to the blocking of the twist, binding the intermediate yarn with a binding yarn at the moment of the blocking of the twist to form a fancy yarn and taking up the fancy yarn.

When used in this specification, downstream" means toward the take up device and upstream means toward the supply of core yarn.

OBJECTS OF THE INVENTION It is a still further object of this invention to provide a process for producing fancy effect yarns by overfeeding at least one effect yarn with respect to at least one core yarn and twisting these yarns to produce a composite yarn, twisting this composite yarn prior to the blocking of the twist, binding the composite yarn at the moment of the blocking of the twist to produce a fancy effect yarn and taking up the fancy effect yarn.

Still further objects and advantages of the process and apparatus of this invention will become more ap parent from the following more detailed description of the attached drawing in which:

FIG. 1 is a diagrammatic illustration of one embodiment of this invention wherein the yarn moves from top to bottom and wherein the lower spindle has a twist blocking member attached at the lower or downstream end;

FIG. 2 is an enlarged diagrammatic illustration of the twist blocking device as shown in FIG. 1;

FIG. 3 is a diagrammatic illustration of a second embodiment of this invention wherein the twist blocking device is placed at the upstream or upper end of the lower spindle;

FIG. 4 shows a further embodiment similar to that in FIG. 3 butin which the twist blocking device is a rigid disc with integral jamming or blocking means;

FIG. 5 is a further embodiment of this invention wherein the direction of the yarn is reversed and wherein the arrangement of the effect and binding spindles and spools is reversed.

As shown in FIG. 1, a core yarn I is supplied to needle 3 from a supply of core yarn 2. On needle 3 which is supported by supporting element 4 the core yarn l and the effect yarn 5 are twisted together. Effect yarn 5 is supplied from the supply of effect yarn 6 which is mounted on first tubular spindle 7.. First tubular spindle 7 is rotatably driven by belt 8 and pulley 9 which is attached to first tubular spindle 7. Core yarn l and effect yarn 5 are wound on needle 3 into an intermediate yarn 10, which then passes through first tubular spindle 7 0 and into a second tubular spindle 11, which carries a spool 12 of binding yarn 13. The intermediate yarn' l0 and the binding yarn 13 are assembled into fancy effect yarn 15 in a twist blocking element 14, which is attached to the lower extremity of second tubular spindle 11 by means of support element 16. The fancy effect yarn 15 is then taken up by any conventional means (not shown).

Both first tubular spindle 7 and. second tubular spindle 11 as shown in FIG. 1 are rotating at speeds of from 500 to 10,000 turns per minute. Second tubular spindle 11 may rotate in the same or in the opposite direction from that of first tubular spindle 7' which causes the initial effect taking twist on needle 3 thus forming intermediate yarn 10. As stated above the direction of the rotation of second tubular spindle l1 depends upon the desired effect. If a tighter effect or fancy yarn is desired, second tubular spindle 11 rotates in the same direction as first tubular spindle 7 causing the initial effect on needle 3. If a looser or a bulkier but less dense fancy effect yarn is desired, second tubular spindle 11 rotates in the direction opposite the effect causing twist of first tubular spindle 7. The twist blocking element 14 located at the lower extremity of second tubular spindle ll locks the resulting twist while simultaneously binding the twisted effect intermediate yarn with binding yarn 13 to produce the fancy effect yarn 15.

An enlarged diagrammatic view of twist blocking element 14 is shown in FIG. 2 and comprises two freely rotating

wheels

17 and 17 in a staggered or zig-zag arrangement of freely rotating wheels 17v and 17' cause intermediate yarn 10 and binding yarn 13 to follow a tortuous or sinuous path and lock the resulting twist while simultaneously binding the effect in intermediate yarn 10 to produce fancy effect yarn 15. Although it is a not necessary to the process of this invention, it is preferred to guide the intermediate yarn 10 and the binding yarn 13 so that they are substantially parallel at the moment of the blocking of the twist and the corresponding binding of the intermediate yarn to form the fancy effect yarn 15.

FIG. 3 shows a modification of second tubular spindle 1] suitable for use in the process of this invention. Intermediate yarn 10 which is formed in the same manner as shown in FIG. 1 is delivered to twist blocking element 20, which is substantially the same as twist blocking element 14 shown in FIG. 2 which is mounted in tubular support 19 attached to the upper portion of second tubular spindle 11. A tubular guide element 21 is attached to tubular support 19 so that intermediate yarn l and binding yarn 13 are guided substantially parallel so that there is a sufficient length of binding yarn to allow an adequate distribution of the additional twist. Again as in FIG. 1 second tubular spindle 11 may rotate either in the same direction or in the direction opposite to the direction of rotation of first tubular spindle 7 as shown in FIG. 1 depending upon the desired type of effect to be produced.

Referring to FIG. 4 which shows a further modification of the twist blocking means associated with second tubular spindle 11, an intermediate yarn is delivered from first tubular spindle 7, as shown in FIG. 1 to a twist blocking means 22 along with binding yarn 13. The twist blocking means 22 comprises a rigid disc 23 with eyelets 24 disposed-at the periphery of disc 23 and twist blocking element 25. Twist blocking element 25 is substantially similar to the twist blocking element as shown in FIG. 2. Binding yarn 13 is delivered through eyelets 24 into twist blocking element 25 along with intermediate yarn 10. The blocking element 25 of twist blocking means 22 imparts an additional twist to intermediate yarn 10 prior to the blocking and binding of the twist, thereby either tightening the effect already formed on intermediate yarn 10 thereby forming a denser and tighter fancy effect yarn or by loosening the effect formed on intermediate yarn 10 thereby forming a fancy yarn 15, which is less dense and consequently bulkier.

Referring to FIG. 5 which shows a further modification of the process of the present invention wherein the core yarn 31 travels in an upward direction, i.e., from the bottom of the page to the top of the page. In this embodiment, core yarn 1 is delivered from a supply of core yarn (not shown) into jacketed spindle 34, on which is a bobbin 33 of effect yarn 32. Core yarn 31 and effect yarn 32, which is ovcrfed with respect to core yarn 31, are wound on needle 35 to form intermediate yarn 36, which passes upwardly into second tubular spindle 37. Bobbin 38 of binding yarn 39 is located on second tubular spindle 37 and integral with second tubular spindle 37 is twist blocking means 40. Twist blocking means 40 comprises blocking element 41 which is substantially similar to the twist blocking element illustrated in FIG. 2, and a rigid disc 44 with at least one aperture or eyelet 42 located at the periphery of rigid disc 44. The binding yarn 39 passes through aperture 42 and into twist blocking element 41. Intermediate yarn 36 is bound with binding yarn 39 in twist element 41 at the moment of the blocking of thetwist thereby producing fancy effect yarn 43 which is delivered to a take up device (not shown). As in the previous embodiments, jacketed tubular spindle 34 and tubular spindle 37 are both rotating at from 500 to 10,000 turns per minute. Depending upon the effect desired tubular spindle 37 is rotating in the same direction as jacketed spindle 34 or in the opposite direction.

Although several twist blocking elements have been disclosed with reference to the process of this invention, other twist blocking devices may be utilized such as a device similar to that shown in FIG. 2 wherein the freely rotating wheels 17 and 17' are replaced by grooved stationary wheels or by smooth solid bars. Although twist blocking elements 22 (FIG. 4) and 40 (FIG. 5) preferably comprise a rigid disc 44 with apertures located along the .periphery of this disc, a more or less flexible guide element as shown in U.S. Pat. No.

3,508,389 may also be used.

The core, effect and binding yarns may be any yarn used for producing fancy yarns such as those composed of natural fibers, synthetic fibers, mineral fibers, etc. The yarns may also be formed from slubbings or rovings and ribbons or slivers of material taken directly from the drawing frame.

The process and product of the present invention will be more specifically illustrated by the following illustrav tive examples which are not to be considered as limiting in any way.

EXAMPLE 1 Using the device shown in FIG. 1, a core yarn composed of two-ply, 78 dtex/17 filaments, polyhexamethylene adipamide is combined with an effect yarn which is a two-ply yarn of textured cellulose acetate, 220 dtex/36 filaments, which is overfed to produce an overfeed ratio of percent. The overfeed ratio is defined by the following formula:

Overfeed ratio Real length of lfccl. yarn in the composite van 7 [00 length oi the composite yztrn The first tubular spindle rotates at 5,000 turns per minute and produces an intermediate yarn with a Z- twist of 1,000 turns per meter. This intermediate yarn is delivered into the second tubular spindle along with a binding yarn which is a multi-filament polyhexamethylene adipamide, 78 dtex/l7 filaments, so that the intermediate yarn and the binding yarn are substantially parallel. The second tubular spindle rotates at 3,000 turns per minute in a direction opposite to the direction of rotation of the first tubular spindle and produces a finished fancy yarn with an S-twist binding twist of 630 turns per meter. The fancy yarn obtained is an extremely bulky chenille type yarn.

EXAMPLE 2 Utilizing the same yarns as core, effect and binding yarns respectively and also the same spindles rotation speeds, a fancy effect yarn utilizing the device shown in FIG. 3 is produced. A fancy yarn with a bulky chenille type appearance is produced using this process.

EXAMPLE 3 Using the device shown in FIG. 1 a core yarn of twoply polyhexamethylene adipamide, 167 dtex/46 filaments, is combined with an effect yarn of one end flake or flame cotton Nm 12 and viscose yarn, 335 dtex/60 filaments, with a Z-twist of 50 turns per meter to produce an intermediate yarn with an S-twist of 790 turns per meter. The effect yarn has an overfeed ratio of 408 percent and the first tubular spindle rotates at 2,000 turns per minute. The intermediate yarn is then delivered to the second tubular spindle which rotates at 1,500 turns per minute in a direction opposite the first tubular spindle. A binding yarn of multi-filament polyhexamethylene adipamide, 167 dtex/46 filaments, is fed into the second tubular spindle so that the intermediate yarn and the binding yarn are substantially parallel. A fancy effect yarn with a binding twist of 540 turns per meter in the Z-twistdirection is obtainedand this yarn is a flame or flake chenille type yarn.

EXAMPLE 4 Utilizing the same yarns as used in FIG. 3 and also the same speed of rotation of the two spindles a fancy effect yarn is produced using the device shown in FIG. 3. A yarn with similar properties to that produced in Example 3 is obtained.

EXAMPLE 5 Utilizing the same yarns as used in FIG. 4 and also the same speed of rotation of the two spindles a fancy effect yarn is produced using the device shown in FIG. 4. A yarn with similar properties to that produced in Example 3 is obtained.

EXAMPLE 6 Utilizing the same yarns as used in FIG. 5 and also the same speed of rotation of the two spindles a fancy effect yarn is produced using the device shown in FIG. 5. A yarn with similar properties to that produced in Example 3 is obtained.

EXAMPLE 7 Using the device shown in FIG. 1 a two-ply Z-twisted parallel ply wool yarn, each ply being Nm 40 and a similar effect yarn are assembled into an intermediate yarn with an S-twist of 840 turns permeter. The effect yarn has an overfeed ratio of 474 percent and the first tubular spindle rotates at 3,000 turns per minute. The intermediate yarn and a binding yarn which is a one end wool Nm 40, S-twisted yarn is fed into the second tubular spindle which rotates at 2,000 turns per minute in a direction opposite the direction of rotation of the first tubular spindle and produces a binding twist in the Z-twist direction of 530 turns per meter. The fancy effect yarn, which is produced utilizing these materials and these rotational speeds, is a very light but bulky in appearance, regularly spaced chenille type yarn. Also utilizing the devices shown in FIGS. 3, 4 or 5 and the same starting materials and rotating speeds, similar yarns may be produced.

EXAMPLE 8 Using the device shown in FIG. 4, a core yarn of a two-ply yarn of polyhexamethylene adipamide, 78 dtex/l 7 filaments, and an effect yarn of two-ply parallel combined textured cellulose acetate yarn, 220 dtex/36 filaments, are assembled into an intermediate yarn with a Z-twist of 1,000 turns per meter. The intermediate yarn has an overfeed ratio of percent and the first tubular spindle rotates at 5,000 turns per minute. The intermediate yarn is then combined with a binding yarn of multifilament polyhexamethylene. adipamide, 79 dtex/l7 filaments, in the second tubular spindle which rotates at 3,000 turns per minute in a direction opposite that of the first tubular spindle and produces a fancy effect yarn having an S-twist of 630 turns per meter. A chenille type yarn with regularly spaced loops is produced.

EXAMPLE 9 Using the same materials for the core, binding and effect yarns and also the same operating conditions a fancy effect yarn is produced using the device illustrated in FIG. 5. Using this device a yarn substantially similar to that produced in Example 8 is obtained.

As is readily apparent the process of the present invention may be adopted to a large number of uses and may be used to obtain many effects which have advantage of a specific appearance regular or intermittent and also the use of the additional twist gives the resulting yarns amore of a chenille like appearance while conventional processes produce fancy effect yarns with a loosely or loop type appearance. This process may also be carried out on ordinary doubling-winding frames and with different assemblies adapted for continuous or intermittent distribution of the effect and core yarns.

While the process and product of the present invention have been illustrated with respect to the foregoing specific examples the process and product of this invention is to be limited only by the following claims and any and all equivalents thereof.

What I claim is:

1. In a process for the manufacture of fancy yarns which comprises:

overfeeding at least one effect yarn in relation to at least one core yarn,

imparting a first twist to the effect and core yarns to form an intermediate yarn,

blocking the twist,

binding the intermediate yarn with a binding yarn at the moment of the blocking of the twist to form a fancy yarn, and

taking up the fancy yarn, the improvement which comprises imparting a second twist to the intermediate yarn prior to the blocking of the twist.

2. The process of claim I wherein the binding yarn is brought substantially parallel to the intermediate yarn at the moment of the blocking of the twist.

3. The process of claim 1 wherein the direction of the second twist is opposite the direction of the first twist.

second twist is the same as the direction of the first twist.

7. The process of claim 1 wherein there is one core yarn.

Claims

1. In a process for the manufacture of fancy yarns which comprises: overfeeding at least one effect yarn in relation to at least one core yarn, imparting a first twist to the effect and core yarns to form an intermediate yarn, blocking the twist, binding the intermediate yarn with a binding yarn at the moment of the blocking of the twist to form a fancy yarn, and taking up the fancy yarn, the improvement which comprises imparting a second twist to the intermediate yarn prior to the blocking of the twist.

2. The process of claim 1 wherein the binding yarn is brought substantially parallel to the intermediate yarn at the moment of the blocking of the twist.

4. The process of claim 1 wherein the direction of the second twist is the same as the direction of the first twist.

5. The process of claim 2 wherein the direction of the second twist is opposite the direction of the first twist.

6. The process of claim 2 wherein the direction of the second twist is the same as the direction of the first twist.

7. The process of claim 1 wherein there is one core yarn.