US3350867A

US3350867A - Process and apparatus for making a novelty yarn

Info

Publication number: US3350867A
Application number: US482221A
Authority: US
Inventors: Elbert F Morrison; Raymond D Joy
Original assignee: Burlington Industries Inc
Current assignee: Burlington Industries Inc
Priority date: 1965-08-24
Filing date: 1965-08-24
Publication date: 1967-11-07
Anticipated expiration: 1984-11-07

Description

NOV. 7, 1967 E, o so ET AL 3,350,867

PROCESS AND APPARATUS FOR MAKING A NOVELTY YARN Filed Aug. 24. 1965 3 Sheets-Sheet 1 INVENTORS Z4 55/67" F/Vomws an F? y/va/va D 1J0 Y ATTORNEYs Nov. 7,1967 MQRRISON ET AL 3,350,867

PROCESS AND APPARATUS FOR MAKING A NOVELTY YARN Filed Aug. 24, 1965 I 5 Sheets-Sheet 2 INVENTORS Z2552 r F/Va/m/sa/v Ffly/vo/va D. Jo Y ATTORNEYfi Nov. 7, 19 67 E MORRISON ET AL 3,350,867

PROCESS AND APPARATUS FOR MAKING A NOVELTY YARN Filed Aug. 24. 1965 5 Sheets-Sheet 5 INVENTORS Z1 ate-fir FT/Vafiw/sa/v 4A%@YM ATTORNEY5 United States Patent 3,359,867 PROCESS AND APPARATUS FGR MAKING A NOVELTY YARN Elbert F. Morrison and Raymond ll). Joy, Clarirsville,

Va, assignors to Burlington Industries, inc, Greenshero, N.C., a corporation of Deiaware Filed Aug. 24, 1965, Ser. No. 482,221

16 Ciairns. (Cl. 57l2) ABSTRACT OF THE DISCLGSURE A method and apparatus for making novelty yarn on a spinning frame by drafting at least one roving of staple fibers and feeding at least one core yarn to and between the front rolls of the drafting frame without influence from the front rolls and then collecting the drafted staple fibers with the core yarn forward of the front rolls and spinning the same together while the advancement of the core yarn is discriminately controlled so as to control the slub-like formations of staple fibers formed as a sheath on the core yarn.

The present invention relates to a method and apparatus for making a decorative or novelty yarn and, more particularly, to a method and apparatus for making a novelty yarn directly on a spinning frame or the like which is continuously drafting staple fibers of a roving while controlling the motion of a core yarn about which the drafted fibers are continuously spun to cause the formation of spun drafted fibers into bunches of fibers entangled around the core yarn in slub-like formations.

Throughout the specification, the novelty effect of the yarn will be referred to broadly as a slub-like formation, but it will be appreciated by those skilled in the art that the term slub-like formation is intended to cover not only slubs, but seeds, flakes, splashing or the like.

Heretofore, many different processes and apparatus have been utilized in an effort to make novelty yarns With slub-like formations therein, the slub-like formations being discriminately spaced and of different or predetermined lengths for varied pattern effects, but such processes and apparatus involved highly complex techniques and equipment including material modifications to the spinning frames or, for that matter, additional equipment to the spinning frames such as a twister mechanism. Some novelty yarns have utilized air jets for obtaining loft (or bulk) to the filament or yarn at discriminate points along the same so as to get a tight-loose ply effect whereas other apparatus and processes involved use of mechanisms changing the speed ratio of the effect yarns to the core yarn in a similar manner as a novelty twister apparatus. In other Words, control of the pattern effect has been attempted by controlling the speed of the staple fibers as they come from the front drafting rolls.

The process or rnehod of the present invention contemplates the producing of novelty yarns by interference of the twisting take-up of the sheath staple fibers by another yarn, namely, a core yarn, whose freedom of movement is controlled. The method of the present invention may be accomplished directly on a conventional spinning frame incorporating the usual roving creel, drafting rolls and/ or feed aprons defining a drafting Zone and spindle and ring and traveler for forming the package of novelty yarn.

Therefore, an important object of the present invention is the provision of an improved simplified method or process and apparatus for producing a novelty yarn in which the movement of a core yarn is controlled in such a manner as to produce a novelty effect while staple fibers are continuously wrapping around the core yarn at all times.

Ancillary to the immediately preceding object, it is a further object of the present invention to provide a method and an apparatus for making a novelty yarn which incorporates the use of a conventional spinning frame. The term spinning frame as used throughout the specification is intended to include a roving frame which is similar in construction but provided for producing roving from sliver rather than finished yarn from rovings.

Another object of the present invention is to provide an improved method and apparatus for making a novelty yarn, the method and apparatus controlling a core yarn as staple fibers are spun about the same, the control being such that the programming of many various patterns may be easily accomplished.

A still further object of the present invention is to provide a method and apparatus for producing a novelty yarn, the method and apparatus being similar to that for producing a core spun yarn, however, the control differing in that the front rolls of the core spinning process have little if any effect on the control of the core yarn passing therebetween as they are continuously operated to provide for continuous drafting of roving or sliver.

Still another object of the present invention is to provide a method and apparatus in which the slub-like formations produced on a novelty yarn are made on the yarn after the staple fibers have been fully drafted and then collected and spun with a core yarn.

Another important object of the present invention is to produce a novelty yarn on a conventional spinning frame, the novelty yarn havin a soft, slubby effect rather than a hard, twisted effect resulting from the making of such yarn on a novelty twister mechanism.

These and other objects and advantages of the present invention will appear more fully in the following detailed description, claims and drawings in which:

FIGURE 1 is a schematic side view of the apparatus of the present invention representative of the operation on a typical spinning frame;

FIGURE 2 is a schematic fragmentary front view of the apparatus of FIGURE 1;

FIGURE 3 is a fragmentary view of a modification of the apparatus for FIGURES 1 and 2 and illustrating the use of a binder yarn rather than two core yarns;

FIGURE 4 is a schematic view of the electromagnetic control means for controlling the movement of the core yarn in the apparatus of FIGURES 1-3;

FIGURE 5 is a schematic side view of a further modification of the apparatus of FIGURES l and 2, this modification utilizing a single core yarn and a plurality of rovings for preparing the novelty yarn of the present invention.

FIGURE 6 is a schematic front view of the modified apparatus of FIGURE 5, the view having portions of the spinning frame broken away and illustrating the control for the movement of the core yarn diagrammatically.

Referring now to the two drawings wherein like reference numerals or characters represent like or similar parts, the apparatus of the present invention is best illustrated in FIGURE 1 where there is disclosed a conventional spinning frame generally designated at 10. The spinning frame 10 is provided with a roving creel 12 and the usual pair of

rear drawing rolls

14 and 16 and the usual pair of front drawing rolls 18 and 2%. Opposed draft aprons 22 may be provided intermediate the

rear rolls

14 and 16 and

front rolls

18 and 20. As in a conventional spinning frame, roving R from a package 24 on the creel 12 is fed over a roll guide 26 or the like through a trumpet guide 28 between the

rear rolls

14 and 16. Drafting of staple fibers of roving R occurs in a draft zone Z intermediate the front rolls 18-20 and rear rolls 14-16 as the front rolls are rotated at a faster speed than the rear drawing rolls. Additionally, the spinning frame 10 includes a spindle 30 suitably mounted on its framework and traversing ring 32 which is provided with the usual traveler 34 rotating about the traversing ring as the package P is formed from the staple fibers of the roving R spun about the core yarn C.

The core yarn C is supplied from a suitable supply package CP on a yarn creel to a control mechanism generally designated at 36 and from there downwardly past a grooved guide roll 33. From the guide 38 the core yarn C is fed to the spinning frame 10 at a point just back of the

front rolls

18 and 26 and through the front rolls where it is collected with the drafted staple fibers of the roving R forward of the front rolls and spun as a decorative or novelty yarn N, it then being delivered to and built on the package P.

'In more detail, and referring to FIGURE 2, it will be noted that two separate core yarns C and C are fed from separate sources of supply (one being shown at CP in FIGURE 1) through the control mechanism 36 past peripherally

grooved guide rolls

18 and 20. The core yarn C or C may be monofilament yarn, multifilament yarn with a twist, previously spun yarn from staple fibers or combinations of the above. The upper front drawing roll 18 is provided with a pair of circumferential

peripheral grooves

40 and 42 so that the core yarn C and C when passing through the

front rolls

18 and 20 is not under influence of the rotation of the front rolls. The grooves have a depth and width at least equal to the diameter of the core yarns, but preferably are slightly larger. Thus, the movement of the core yarn C and C may be stopped by the control mechanism 36 at predetermined intervals for a predetermined length of time while the front drawing or

drafting rolls

18 and 26 are continuously drafting staple fibers of the roving R.

As the drafted staple fibers of the roving R emerge from between the

front rolls

18 and 20, they are collected, at a point 44, just forward of the front rolls with the strands of core yarn C and C. Since the traveler 34 is continuously rotating about the traversing ring 32, the collected staple fibers are spun with the core yarn C and C as the novelty yarn is formed and wound onto the package P.

In order to obtain the novelty effect of slub-like formations S on the novelty yarn N, the advancement of the core yarn C and C is selectively controlled by the control mechanism 36 which is best illustrated in FIGURE 4. In more detail, the control mechanism 36 includes

opposed tension discs

46 and 48, the lower tension disc 48 being fixed whereas the upper tension disc 46 is mounted for movement on a shaft 50 which provides a core for the coils 52 of an electromagnet. The coils 52 are in a circuit 54 having switch means 56 thereon, the switch means 56 being preferably a microswitch. A controllable variable speed electric motor 58 continuously rotates a pattern wheel 60 having a plurality of pegs P discriminately positioned about its periphery. The pegs P are arranged to engage and close the switch means 56 for predetermined lengths of time so as to energize the circuit 54, thus, creating a magnetic field about the coil 52, the magnetic field attracting the upper disc 46 toward the lower disc 48 to thereby arrest or stop the core yarn C and C passing there through. By rearranging the position of the pegs P on the pattern wheel 60 or by changing the speed of the motor 58, the pattern effect of the novelty yarn N may be changed within limits. Also, the friction of the

tension discs

46 and 48 on the core yarn C and C may be varied by controlling the spring pressure normally urging the discs apart through suitable adjustment of the control knob 62. While the control mechanism 36 has been illustrated and described as using an electromagnet for controlling the

discs

46 and 48, it will now be appreciated by those skilled in the art that a solenoid could be used.

When it is desired to put a slub-like formation S in the novelty yarn N, the core yarn is stopped or retarded in movement by energizing the circuit which causes the tension discs to be clamped together. This stops the core yarn C and C between its source of supply and the traveler 34 rotating the traversing ring 32. However, rotation of the front drawing rolls 18 and 2% is continued so that the staple fibers of the roving R are continuously drafted and delivered from the front rolls and they build up and entangle in the slub-like formations S on the core yarn C and C. The length of time which the core yarn C and C is stopped determines the length of build up of the staple fibers and various effects can be obtained by changing such length of time or the frequency of application of the

tenion discs

46 and 48. It will be noted that in the particular arrangement disclosed in FIGURES 1, 2 and 4, the staple fibers of the roving R are collected intermediate the merging of the two strands of core yarn C and C and thus, the staple fibers which form the sheath of novelty yarn N are further locked between the strands of core yarn when the strands are spun with the staple fibers.

It will be noted that the staple fibers of the roving R are segregated from the strands of core yarn C and C until the staple fibers have been fully drafted and have passed from the

front rolls

18 and 20 of the spinning frame 10. The purpose of maintaining the staple fibers separated from the core yarn is that the staple fibers must not get into the

grooves

40 and 42 of the upper front roll 18 where they would cause the

front rolls

18 and 20 to have an effect on the core yarn C and C when the core yarn is stopped.

Referring now to FIGURE 3, there is disclosed a modification of the apparatus of FIGURES 1 and 2 and in this modification it will be noted that only a single strand of core yarn C passes through the upper and

lower tension discs

46 and 48 of control unit 36. However, a strand of yarn B, functioning as a binder yarn, is continuously delivered from a supply package (not shown) directly to one of the guide rolls 38 and from there between the

front rolls

18 and 20 of spinning frame 10 where it is collected at 44 with the core yarn C and the staple fibers S. The yarn produced by the arrangement in FIGURE 3 differs slightly from that produced by the arrangement of FIGURES 1 and 2 in that the binder yarn B is continuously fed through the

front rolls

18 and 20 along with the staple fibers of the roving R when the core yarn C is stopped. Consequently, the binder yarn B functions to further tightly hold the staple fibers when they are spun as a sheath along the entire length of the novelty yarn N.

Referring now to FIGURES 5 and 6 there is disclosed a further modification of apparatus for the present invention. The spinning frame 10' is provided with the usual rear rolls 14' and 16 and front drawing rolls 18 and 20 with an intermediate drafting apron 22. In this particular environment of the invention, the upper front roll 18 is provided with a single circumferential peripheral groove 40 as only one strand of core yarn C is utilized whereas the staple fibers of two rovings R and R are spun with the core yarn C to make the novelty yarn N onthe package P. i

As will be noted in FIGURE 5, the rovings R and R are fed through a trumpet guide 28 to the rear rolls 14' and 16' and from there through the drafting apron 22 to and between the front rolls 18 and 20'. It is also important in the environment disclosed in FIGURES 5 and 6 to maintain the staple fibers of the rovings R and R separated from each other and from the core yarn C until the staple fibers and the core yarn C emerge from the front drafting rolls 18 and 20' and are collected at the point 44' just forward of the front rolls.

This is accomplished by utilizing a roving guide pin 23 just forward of the infeed side of the drafting apron 22'. The reason for maintaining the rovings R and R separated from each other and from the core yarn C is substantially the same as previously described in that the staple fibers must not get into the groove 40 of the front roll 18 where it would cause interference of the feed of core yarn through the front roll or would cause the front rolls to have an effect on the core yarn when the core yarn is stopped, slowed down or the like. In other Words, the core yarn must be able to move relative to the rotating front rolls 18' and 20 at all times and, thus, there should be as little friction between the core yarn C and the front rolls as possible. The groove 40 in the front roll 18', just as the

grooves

40 and 42 in the roll 18, are preferably slightly larger than the diameter of the core yarn used so as to allow freedom of movement of the core yarn with respect to the front rolls.

A control mechanism 36" for the apparatus of FIG- URES 5 and 6 differs somewhat from that described above with respect to FIGURES 14 in that the control mechanism includes means for reversing the direction of movementof the core yarn C through the front rolls 18' and 20 for a predetermined increment. In more detail, the control mechanism 36' includes a controllable variable speed electric motor 58' which rotates a pattern Wheel 60 having a plurality of pegs P discriminately positioned about its periphery. Thepegs P are arranged to engage and close a switch means 56 in a circuit 54 so as to energize a solenoid 70.

Solenoid 70 is provided with a core 72 which is pinned at its end as indicated at 76 to the end of a shaft or rod 74 extending along the length of the spinning frame 10. The shaft 74, which is suitably mounted in the frame structure of the spinning frame by bearing brackets 75, carries a plurality of floating collars 78 thereon which are slidable relative thereto as well as check collars 80 (one shown in FIGURE 6) fixedly attached to the shaft 74 by set screws 82or the like. Tension discs 46' and 48 abut against one of the check collars 80 and one of the floating collars 78 and thus when the solenoid 70 is energized to move its core 72 to the right of FIGURE 6,- the check collar 80 carried by the shaft 74 also moves to the right and causes the

tension discs

46 and 48 to clamp the coreyarn C passing therebetween.

It will be noted that the end of the shaft 74 is provided.

with an enlarged collar 84 and a spring interposed between the collar 84 and the left hand bearing bracket 75 normally urges the shaft 74 toward the left of FIGURE 6. Any number of floating collars 78 and check collars 89 are provided along the entire length of the spinning frame depending upon the number of pairs of tension discs 46 and 48' spaced therealong for feeding core yarn to the take-up creel. The check collars 80 may be suitably adjusted lengthwise of the shaft 74 so as to provide a fine thread adjustment necessary to apply equal tension on the various units down the entire length of the machine.

A microswitch 86 provided in a circuit 88 is adapted to be closed by means of a switch actuator 90 carried on the core 72 of the solenoid 70. Thus, when the solenoid 70 is energized to retract'its core 72 to the right of FIG- URE 6, the core yarn is first clamped by the tension-discs.

46' and 48' and then the switch actuator engages the microswitch 86 to close the same and energize the circuit 88. This circuit includes a second solenoid 92 which has a core 94 operatively connected by a pivot link 95 to an arm 96 extending radially from a collar 98 rotatably mounted on the shaft 74. Extending in an opposite direction from the collar 98 is a second arm 100 which is connected at its outer end to a spring 102,. the other end of the spring being suitably connected to the frame structure of the spinning frame 10. Arm 6 at its outer end is provided with a rod 164 extending parallel to the shaft 74- along the length of the spinning frame.

When the core yarn C is stopped by the clamping action of the tension discs 46 and 43' due to energizing of the solenoid 70, the switch actuator 99 will then close the switch 86 to energize the circuit for the solenoid 92. Once the solenoid 92 is energized, its core 94 is moved inwardly of the same as shown in FIGURE 5 carrying with it the arm 96 and its rod 1% against the tension of spring 102. The rod 1% which bears against the core yarn C moves from the full line position of FIGURE 5 to the broken line position and since the core yarn has been clamped between tension discs 46' and 48', the core yarn is pulled backwardly from the package P through the traveler 34 and package P and through the drawing rolls 18' and 20 and about the guide roll 38'. This action will give further length to the siub-like formation S formed on the novelty yarn N. A control of the length of the novel effect S is up to one inch by use of the arrangement just previously described and the effect is somewhat of a splash effect.

Examples One type of novelty yarn made according to the pres ent invention which has a soft effect rather than the undesirable hard twisted etfects of a novelty yarn done on a novelty twister is identified as Lot 317-110. This yarn had 1/28s count, the two cores both being 70 denier dacron filament natural. The roving used for the effect was a wool dacron roving and the novelty yarn made therefrom by one process on a spinning frame had 15 TS.

Another yarn identified as Lot 317-6 also had 1/28s count, both of the cores being made from 70 denier nylon black filament. The roving used for the effect was a 70s wool black roving and the novelty yarn made therefrom had 15 TS, the entire operation being accom-.

plished on the spinning frame.

A third yarn identified by Lot 365 utilized a 1/30 s count of l/s 20 T.Z. wool-dacron black yarn. The roving which was drafted and spun as sheath fibers about the same was s black wool roving and a binder yarn which was a 40 denier nylon black filament was also used. The novelty yarn was completed in one operation on a spinning frame and had 15 T1.

A fourthyarn was made in two operations which included the application of a binder yarn after the core yarn and the staple fibers had been spun on a spinning frame. In this case the binder yarn, rather than being applied directly to the spinning frame as described above, was applied to the yarn finished on the spinning frame by use of the conventional twister apparatus. This yarn is identified as Lot 364 and had a count of s, the core being denier dacron filament. T he effect was obtained by using a rayon roving of 3 denier having staple fibers of approximately 3 inches in length. The core and the effect roving were spun on the spinning frame as described above and the resulting product had 16 T1. The

binder yarn, which was 40 denier dacron filament was then spun with this yarn on a conventional twister and the resulting product had 16 TS.

A fifth yarn, which was also accomplished by the two-operation process is identified as Lot 31722. This yarn was made with 130 s count of 70 denier dacron natural filament. The effect roving was a 3 denier rayon roving having approximately 3 inch in length staple fibers. The core and effect roving were spun and the resulting product had a T.Z. Binder yarn was subsequently applied and the binder was a 40 denier dacron natural filament. The second operation of applying the binder was done by the conventional twister and the final resulting product had 15 TS.

The method and apparatus heretofore described and illustrated in the drawings fully and effectively accomplish the advantages of the present invention. It will be realized, however, that the foregoing specific embodiments have been shown and described only for the purpose of illustrating the principles of this invention and are subject to some changes without departing from such principles.

Therefore, the terminology used in this specification is for the purpose of description and not limitation, the spirit and scope of the invention being described in the claims.

What is claimed is:

1. The method of making a novelty yarn on a spinning frame having a roving creel, drawing rolls, a spindle and a ring and travelers; comprising the steps of: introducing at least one roving of staple fibers to rear rolls of the drawing rolls and continuously drafting the same between the rear rolls and front rolls; feeding at least one core yarn from a supply to and between the front rolls without influence from the front rolls; then collecting the drafted staple fibers with the core yarn just forward of the front rolls and spinning the same together while winding them on the spindle; selectively stopping the advancement of the core yarn through the front rolls, while the staple fibers of the roving are being continuously drafted by the front rolls, to cause the staple fibers to collect and entangle in slub-like formations on the core yarn; and selectively reversing the direction of movement of the core yarn through the front rolls for a predetermined increment after the advance of the core yarn has been stopped to further control slub-like formations on the core yarn.

2. The method as claimed in claim 1 including maintaining the staple fibers of the roving separate from the core yarn as the staple fibers are passing through the front rolls.

3. The method as claimed in claim 1 including anchoring the staple fibers to the core yarn by twisting a binder yarn about the spun core yarn and staple fibers.

4. The method as claimed in claim 1 including feeding at least two core yarns in spaced relationship to each other to and between the front rolls with the staple fibers of the roving being fed through the front rolls intermediate the two core yarns, the two core yarns being collected and spun with the staple fibers anchored therebetween at a position just forward of the front rolls.

5. The method as claimed in claim 4 including twisting a binder yarn about the spun core yarns and staple fibers.

6. The method as claimed in claim 1 including introducing two rovings of staple fiber to and between the drafting rolls in spaced relationship to each other and with the core yarn passing through the front rolls intermediate the drafted staple fibers of the two rovings, the drafted staple fibers and the core yarn then being collected and spun.

7. The method as claimed in claim 6 including twisting a binder yarn about the spun core yarn and staple fibers.

8. The method of making a novelty yarn on a spinning frame having a roving creel, drawing rolls, a spindle and a ring and traveler; comprising the steps of: introducing at least one roving of staple fibers to rear rolls of the drawing rolls and continuously feeding and drafting the same between the rear rolls and front rolls; feeding at least one core yarn from a supply to and between the front rolls without influence from the front rolls and in spaced relationship to the staple fibers passing through the front rolls; collecting the drafted staple fibers with the core yarn just forward of the front rolls and spinning the same together and winding them on the spindle; selectively clamping and releasing the core yarn between the front rolls and the supply so that the core yarn is at least slightly stretched between the spindle and the front rolls during clamping and stopped in the area where the staple fibers are collected with the core yarn so that the staple fibers bunch and entangle into slub-like formations on the core yarn; and further stretching the core yarn while the same is clamped so that a predetermined increment of the core yarn reverses its direction of movement through the front rolls to thereby lengthen the build-up area of the slub-like formations on the core yarn.

9. The method as claimed in claim 8 including programming the length of time the core yarn is clamped so as to produce a desired pattern effect of build up of slub-like formations on the core yarn.

1%. Apparatus for producing a novelty yarn having bunches of slub-like formations of staple fibers on a core yarn comprising in combination: a spinning frame having a roving creel, a pair of rear and a pair of front drawing rolls for continuously drafting staple fibers of a roving, a spindle, and a ring and traveler; means for feeding a core yarn from a supply package behind the front rolls and through the same to the spindle; means for selectively stopping the feed of the core yarn intermediate the front rolls and the supply package and while staple fibers of the roving are being continuously drafted between rear and front rolls of the spinning frame; and means operable after said last-mentioned means selectively stops the feed of core yarn for engaging the core yarn and pulling a predetermined length in a reverse direction through the front rolls.

11. The apparatus as claimed in claim 10 in which one of said front rolls includes a peripheral groove for receiving the core yarn passing therethrough whereby the core yarn is substantially without frictional influence by the front rolls when said selective stopping means stops the core yarn.

12. The apparatus as claimed in claim 10 in which said means for selectively stopping the core yarn includes a pair of tension discs through which the core yarn passes and electromagnetic means selectively operable for causing said tension discs to move toward one another for clamping said core yarn.

13. The apparatus as claimed in claim 12 including a random timer for selectively energizing said electromagnetic means.

14. The apparatus as claimed in claim 10 including means for keeping drafted staple fibers of the roving separated from the core yarn until after the fibers and core yarn pass through the front rolls.

15. The method of making a novelty yarn on a spinning frame having a roving creel, drawing rolls, a spindle and a ring and traveler; comprising the steps of: introducing at least one roving of staple fibers to rear rolls of the drawing rolls and continuously drafting the same between the rear rolls and front rolls; feeding at least one core yarn from a supply to and between the front rolls without influence from the front rolls; continuously feeding a binder yarn through the front rolls in spaced relationship to the core yarn with the drafted staple fibers being passed through the front rolls intermediate the binder yarn and the core yarn; then collecting the drafted staple fibers with the core yarn and binder yarn just forward of the front rolls and simultaneously spinning the same together while winding them on the spindle; and selectively stopping the advancement of the core yarn through the front rolls, while the staple fibers of the roving are being continuously drafted by the front rolls, to cause the staple fibers to collect and entangle in slub-like formations on the core yarn.

16. Apparatus for producing a novelty yarn having bunches of slub-like formations of staple fibers on a core yarn comprising in combination: a spinning frame having a roving creel, a pair of rear and a pair of front drawing rolls for continuously drafting staple fibers of a roving, a spindle, and a ring and traveler; means for feeding a core yarn from a supply package behind the front rolls and through the same to the spindle; means for selectively stopping the core yarn and including a pair of tension disks through which the core yarn passes, electromagnetic means selectively operable for causing said tension disks to move toward one another for clamping said core yarn, and a random timer for selectively energizing said electromagnetic means; and means operable upon energizing of said electromagnetic means for engaging the core yarn and pulling a predetermined length in a reverse direction through the front rolls.

References Cited UNITED STATES PATENTS 2,309,095 1/1943 Bry 57160 2,953,893 9/1960 Smith et a1. 57-36 2,990,673 7/1961 Adkins.

3,053,040 9/1962 Livingston 57144 X 10 FRANK J. COHEN, Primary Examiner.

W. S. BURDEN, Examiner.

Claims

10. APPARATUS FOR PRODUCING A NOVELTY YARN HAVING BUNCHES OF SLUB-LIKE FORMATIONS OF STAPLE FIBERS ON A CORE YARN COMPRISING IN COMBINATION: A SPINNING FRAME HAVING A ROVING CREEL, A PAIR OF REAR AND A PAIR OF FRONT DRAWING ROLS FOR CONTINUOUSLY DRAFTING STAPLE FIBERS OF A ROVING A SPINDLE, AND A RING AND TRAVELER; MEANS FOR FEEDING A CORE YARN FROM A SUPPLY PACKAGE BEHIND THE FRONT ROLLS AND THROUGH THE SAME TO THE SPINDLE; MEANS FOR SELECTIVELY STOPPING THE FEED OF THE CORE YARN INTERMEDIATE THE FRONT ROLLS AND THE SUPPLY PACKAGE AND WHILE STAPLE FIBERS OF THE ROVING ARE BEING CONTINUOUSLY DRAFTED BETWEEN REAR AND FRONT ROLLS OF THE SPINNING FRAME; AND MEANS OPERABLE AFTER SAID LAST-MENTIONED MEANS SELECTIVELY STOPS THE FEED OF CORE YARN FOR ENGAGING THE CORE YARN AND PULLING A PREDETERMINED LENGTH IN A REVERSE DIRECTION THROUGH THE FRONT ROLLS.