US3222857A

US3222857A - Method of and device for treating yarns, threads, and the like with a fluid medium during the spinning or twisting operation

Info

Publication number: US3222857A
Application number: US299239A
Authority: US
Inventors: Keyser Johann Jacob
Original assignee: Individual
Current assignee: Individual
Priority date: 1962-08-09
Filing date: 1963-08-01
Publication date: 1965-12-14
Anticipated expiration: 1982-12-14
Also published as: DE1177532B; CH411645A; DE117752C; GB985258A; BE636046A

Description

Dec. 14, 1965 J. J. KEYSER 3,222,857

METHOD OF AND DEVICE FOR TREATING YARNS. THREADS, AND THE LIKE WITH A FLUID MEDIUM DURING THE SPINNING OR TWISTING OPERATION Filed Aug. 1, 1963 2 Sheets-Sheet 1 Dec. 14, 1965 J. J. METEEN 3,222,857

METHOD 0F AND DEVICE FOR TEEATING YARNS. THREADS, AND THE LIKE WITH A FLUID MEDIUM DURING THE SPINNING 0R TWISTING OPERATION Filed Aug. l, 1965 2 Sheets-Sheet 2 United States Patent C) 3,222,857 METHD F AND DEVICE FR TREATING YARNS, THREADS, AND THE LiKE WITH A FLUID MEDIUM DURING THE SPINNlNG 0R TWlSTlNG @PERA'HON Johann Jacob Keyser, Grabenallee 16, Aarau, Switzerland Filed Aug. 1, 1963, Ser. No. 299,239 Claims priority, application Germany, Aug. 9, 1962, K 47,466 12 Claims. (Cl. 57-3.5)

The present invention relates to the treating of yarns, threads, or the like with a liquid or gaseous medium during the spinning or twisting operation.

With heretofore known spinning and twisting operations, the yarns and threads are not subjected to a special treatment. A good yarn -or thread quality is rather obtained by effecting the spinning and twisting process in climatized or airconditioned rooms which assure a certain humidity content of the yarns and threads. It is a well known fact that continuous endeavors aim at accelerating the spinning and twisting operations by the employment of higher speeds and by increasing the speed of rotation of the spindles While simultaneously increasing the cop weights.

Experience has shown that the climatizing of the rooms is insuilicient to maintain the heretofore obtained qualities or even to improve the same.The reason for this is seen in the fact that the increased winding-olf speeds, the increase in the occurring centrifugal forces, the enlargement of the cop diameter, and the enlargement of the balloons foster a drying of the yarns and threads in such a manner that the humidity content decreases too much. This in turn brings about that with the increase in the speeds, also the quantity of lint being formed increases which, due to the fact that the lint also accumulates in the cops, not only worsens the conditi-ons of operation and handling but in addition thereto also decreases the yarn quality. As further drawbacks may be mentioned an increased roughness of the thread, an increase in the friction at the sliding portions and a decrease in the thread elasticity with an increasing danger of thread breakage inherent thereto.

It is known to wet spin and twist by passing the thread through water baths. In this way the thread is fully wetted at low speed, while at increased speed the thread absorbs humidity at the surface only. Moreover in this connection it is for all practical purposes impossible to maintain a certain denite humidity content. In addition thereto, the Wet method merely furnishes the possibility of treating the thread with liquid media whereas a special treatment with gaseous or paste-like media cannot be effected.

There is also known a method according to which a twisting is eiTected within a housing which is designed as balloon restrainer. With this method, steam is blown to the chamber of the housing in order by means of the steam passing therethrough to restrain the balloon in such a way that the thread will not contact the inner wall of the housing. In this connection simultaneously a certain humidication of the yarn surface will occur. At high speed, the yarn or thread passes through the steam permeated chamber for only such a short time that the absorption or absorbing ability is insuflicient during the passage of the yarn or thread through said chamber to assure an absorption of humidity to the necessary extent to Sulliciently humidity the thread. Moreover, the enrichment with humidity cannot be directly controlled but depends exclusively on the extent to which the yarn or thread is able to absorb humidity. Finally, the effect of the steam on the yarn or thread is limited to those sections of the yarn or thread during the spinning or twisting operation which rotate outwardly as balloon so that the centrifugal force acts counter to the absorption of humidity or, expressed differently, centrifuges absorbed humidity.

The lack of the possibility that the yarn or thread during the spinning or twisting operation absorbs humidity or other treating media to a satisfactory extent has the additional drawback that during the contact with the thread guiding means, such as thread guide eyelet, runner, balloon restrainer, thread storing disc an-d hollow shaft of double-twisting spindles, an increased friction occurs which aids in the formation of lint. Furthermore, a roughening of the yarn or thread occurs which might even lead to a breakage of the thread or yarn. The lack of smoothness of the yarn or thread also brings about that considerable power is required for moving the parts moved by the yarn or thread, which increased power has, of course, to be furnished bythe machine. It is thus obvious that an elimination of the above mentioned drawbacks would reduce the necessary energy to -be employed.

It is, therefore, an object of the present invention to provide a method of and device for humidifying yarns, threads or the like, which will overcome the above mentioned drawbacks.

It is a further object of this invention to provide a method of and device for humidifying yarns or threads in such a way that the humidication can be precisely controlled while the surface of the thread or yarn will be smoothed, its sliding ability will be increased and a drying out in view of a high speed during the spinning or twisting operation will be counteracted.

It is still another object of this invention to provide a method of and device for humdifying yarns and threads, which will make it possible to vary the intensity of the humidifying effect upon the yarns or threads, especially in the twisting zone.

Still another object of this invention consists in a method of and device for humidifying threads and yarns which will make possible a uniform treatment thereof on all spindles.

Still another object of this invention consists in a method of and device for humidifying threads and yarns which will greatly decrease the formation of lint while improving the working conditions.

These and other objects and advantages of the invention will appear more clearly from the following specification in connection with the accompanying drawings, in which:

FIG. 1 illustrates an arrangement according to the invention in connection with a spinning or twisting spindle having a vertically adjustable hollow shank with a blow nozzle inserted into the upper end thereof.

FIG. 2 shows a modied arrangement according to the invention having a spinning or twisting spindle of a different design with a thread guiding member thereabove which is designed in a trough-shaped manner.

FIG. 3 shows a double-twisting spindle with a device for introducing treating media into the twisting point of the thread within the spindle.

A device according to the present invention for treating yarns, threads, or the like with a liquid, semiliquid, or gaseous medium, such as water, steam, wetting means, or the like, during the spinning or twisting operation in spinning or twisting machines as the spindles rotate about a nonrotatable and if desired vertically adjustable shank and` is characterized primarily tin that the shank is hollow over its entire length and that the treating medium is adapted to be blown through the shank into the twisting zone, preferably directly into the twisting point of the yarn or thread. Such an arrangement makes possible the treatment of the thread or yarn to the specically desired extent inasmuch as the quantity of the treating medium can be precisely controlled during the spinning or twisting operation. Moreover, the treating medium may be so introduced into the yarn or thread that it acts not only upon the surface thereof but penetrates into the interior without having to rely on the absorbability of the material.

Due to the fact that the yarn, thread or the like is treated in the twisting zone, preferably directly in the twisting point, i.e., due to the fact that the thread or yarn is exclusively in its twisting point subjected to the treatment by a liquid or gaseous medium, such as steam, wetting media, and the like, this medium is so to speak twisted into the core of the yarn or thread, which means that it penetrates the interior of the yarn from where the treating medium can distribute itself to the outside over the cross section of the yarn or thread. In contrast to the heretofore known pure surface treatment, the centrifugal force aids in a uniform distribution of the medium over the thread. This method according to the invention will assure that in spite of a high speed of the thread or yarn, the treating medium will be retained in the thread or yarn and will not be centrifuged oft" as is the case with a pure surface treatment.

Referring now to the drawings in detail and FG. l thereof in particular, the arrangement shown therein illustrates a spindle rail 1 through which extends a whorl sleeve 7 having its lower end provided with a thread 8 and connected to said spindle rail by means of a washer 10 and a n-ut 9 and a further washer 11 and supporting

rings

12 and 13. Sleeve 7 forms the inner race ring of ball bearings 14 .and 15. The whorl proper 18 is held between the

outer race rings

16 and 17 of said

ball bearings

14 and 15 respectively. Seals in the form of

discs

19 and 20 seal the said ball bearings toward the outside. Mounted on and in axial arrangement with the outer race ring 17 is a bobbin sleeve receiving body 21 for receiving the lower end of the bobbin sleeve 2. The bobbin sleeve 2 is held on the bobbin sleeve receiving body 21 by means of a spring 22 and ball 23. The upper end of sleeve 2 rests against a cylindrical outer race ring 24 of a ball bearing 25 the inner race ring 26 of which is connected to a hollow shaft Z7 which latter extends downwardly through the whorl sleeve 7 and leads into a T- shaped fitting 28. Fitting 28 communicates with a feeding line 29 for a treating medium or the like. By raising or lowering the feeding line 29, the free length of shank 27 which extends beyond the whorl and the bobbin sleeve receiving body 21 may be varied .in conformity with the length of the respective bobbin sleeve 2.

In conformity with a further development of the present invention, the upper end of the hollow shank 27 has arranged therein a blow or spray nozzle 3). The mouth of said nozzle may in conformity with a further development of the invention be directed into the center of a thread guiding member associated with the spindle. Such thread guiding member is shown in FIG. 1 in the form of a thread guiding eyelet 31 which by means of a supporting arm 32 is tiltable upwardly and downwardly about a substantially horizontal tube 33 extending alongside the machine.

During the spinning operation, the twisting point of the yarn or thread 6 is located within the thread guiding eyelet 31. `It is toward this point that the blow nozzle 30 is directed so that the liquid or gaseous medium intended for the treatment of the thread or yarn will precisely hit into the twisting point. In this way, the intensity of the impact may be varied by axially displacing shank 27 more or less in conformity with the length of the bobbin. The axial displaceability of shank 27 thus serves not only to adapt the arrangement to the length of sleeve 2 but also to vary the distance of the blow nozzle 30 from the twisting point of the thread or yarn V6.

From the above it will thus 'be evident that due to the fact that the twisting point of the yarn or thread is for all practical purposes located in the plane of the thread guiding member, for instance the thread eyelet 31, and since the nozzle opening at the end of the hollow shank 27 extends directly along` the extension of the central axis of the thread guide 31, the treating medium is blown by the nozzle directly into the twisting point. The sprayed medium can without difficulties be varied and metered, for instance by a simple valve in the feeding line, so that the quantity of the treating medium can be adjusted to a precise desired value in conformity with the requirement of the respective material being spun or twisted. If the charge or material being treated is particularly dry, the quantity of the sprayed treating medium, for instance steam, is increased whereas if the charge is humid from the very start, a relatively small quantity of treating medium, for instance steam, is necessary in order to assure the desired humidity of the yarn or thread. Similar remarks apply, of course, also when other liquid or gaseous treating media are used.

While according to the arrangement of FIG. l the distance between the nozzle 3i) and the twisting point may be varied by vertically adjusting the shank 27, it is, of course, also possible to make the blow nozzle adjustable within the hollow shank 27, so that only the blow nozzle will have to be vertically adjusted without the necessity of vertically adjusting the shank 27.

Referring now to the arrangement of FIG. 2, also this arrangement comprises a spinning or twisting spindle with a hollow holding shank 34 which is connected to the spindle rail 1. In a manner similar to that described in connection with FIG. l, shank 34 has its lower end connected to a T-shaped fittting 28 communicating with a feeding line 29 for the treating medium. By interposing shock absorbing rings 35, a threaded sleeve 36 is inserted through a bore in the spindle rail 1 and is connected thereto by means of a nut 37 and washer 38. The threaded sleeve 36 surrounds with play the hollow spindle shank 34. Sleeve 36 has its upper end provided with outwardly extending ange means 36a to which is connected a hollow conical body 39 which may support a spindle brake or the like, e.g., of the type disclosed in my copending application S.N. 217,789, tiled August 20, 1962, now U.S. Patent No. 3,137,118. Mounted 0n body 39 and supporting the spindle shank 34 is a ball bearing 40 the outer race ring of which has mounted thereon a whorl 41 resting on ball bearing 40 by means of its shoulder 42. Whorl 41 has an upwardly directed extension 43 for receiving a hollow conical spindle body 44 the upper end of which rests on a ball bearing 45 which is Xedly connected at the upper end of the hollow spindle shank 34. The upper end of spindle body 44 is closed by a closure member 46 provided with a central bore through which extends a blow nozzle 47 inserted into the upper end of the hollow shank 34. The blow nozzle 47 may be more or less moved out of the hollow shank 34 and may have its outer peripheral portion which is in sliding engagement with shank 34 provided with springurged ball means for engaging corresponding grooves in shank 34 so that the blow nozzle 47 will be held in its respective adjusted position. Above the spindle there is provided a thread guiding member which in conformity with FIG. 2 is designed as a trough-shaped body 48 opening in the direction toward the blow nozzle 47. Trough-shaped body 4S has a centrally located aperture 49 through which the yarn or thread 6 passes. As will be evident from FIG. 2, the treating or spraying medium or the like is sprayed primarily against the opening 49 so that a portion of the medium will be sprayed into the trough-shaped portion in which it will be distributed in a concentrated manner whereby the yarn or thread will be subjected to an additional treatment in the chamber below the twisting point. The thread guiding member is adjustably supported in the same manner as described for the thread guiding member of FIG. l.

The modification illustrated in FIG. 3 comprises a double-twisting spindle. More specifically, by means of shock absorbing sleeves 35, the hollow shank 50 is connected to the spindle rail 1. The lower end of shank 50 has connected thereto a T-shaped fitting 28 connecting a feeding line 29 for the treating medium with the interior of shank 50. The upper end of hollow shank 50 has mounted therein a blow nozzle 51 the nozzle opening of which extends in axial direction of shank 50. Journalled on 4hollow shank 50 by means of the two antifriction bearings 52 is a whorl 53 having its upper end provided with a radially extending ange 54. Mounted on said ange 54 is a thread storage disc 55 provided with radially directed passages 56 for thread 6. Disc 55 carries a radially extending overflow dish 57. The central portion of disc 55 has a hub 5S having arranged therein two antifriction bearings 59 journalling the thread guiding member 60 in form of a tube. This tube is similar to hollow shank 50 at a standstill during the twisting oph eration because a multi-pole magnet 61 surrounding shank 50 cooperates with a similar magnet 62 mounted on the thread guiding member 60. In this way, the magnets 61 and 62 prevent the thread guiding member 60 from rotating with the thread storage dish 55.

By means of a cylindrical body 65, the upper end of the tubular thread guiding member 60 carries the hub 63 of the bobbin dish 64. Dish 64 forms the carrier for the can 66 in which bobbin 3 rests on the bobbin sleeve 2. The lower end of bobbin sleeve 2 rests on dish 64 while its lower inner wall portion engages on one hand a follower ring 69 on hub 63 of dish 64 and on the other hand its upper end rests on the cylindrical body 65. A bearing body 70 is freely rotatable about the stationary tubular thread guide member 60 and is supported by cylindical body 65 which similar to the thread guiding member 60 stands still. The bearing body 70 carries a thread runner 71. By means of thread runner 71, yarn 6 is withdrawn from bobbin 2 and from the top is passed downwardly through the thread guiding tube 60 whereupon the thread 6 is by means of disk SS passed radially outwardly through a passage 56 and then passed in customary manner outside can 66 in upward direction. The twisting operation of yarn 6 is effected primarily at the exit of the yarn 6 from tube 60, which means at the spot where the yarn enters the thread storage disk 55. It is against this twisting point that the nozzle opening of blow nozzle 51 is directed so that the treating medium which passes through conduit 29 communicating with blow nozzle 51 impacts upon the yarn in the twisting point whereby primarily the core of the yarn is acted upon so that the latter will be subjected to an intensive treatment.

As will be evident from the above, the yarn 6 being unwound from bobbin 3 is treated in the same manner as described in connection with FIGS. l and 2 and the treating medium can likewise by a corresponding valve in the feeding line be precisely controlled and metered out. The media are blown or sprayed `out axially through the blow nozzle 51 and exert an intensive effect directly onto the twisting point. In addition thereto, in conformity with the arrangement of FIG. 3, a certain humidifying action is exerted upon the yarn with the tube 6@ and within the thread storage disk 55 so that not only the core of the yarn absorbs the medium but also other sections thereof will absorb the humidifying medium whereby the treating medium will be fully uniformly distributed over the cross-section of the yarn, and the humidifying medium will uniformly distribute itself primarily from the core in cross-sectional direction over the cross section of the thread.

As will be evident from the above, the method and devices according to the present invention furnish the possibility of precisely metering out the sprayed medium or the like and directing the same into the twisting point of the yarn or thread while the latter will absorb the humidifying medium to the desired extent. In this way a certain desired concentration of the humidifying medium will be assured, and the desired quality of the yarn or thread will be obtained which in turn makes possible a proper spinning and twisting operation. The method and 6 device according to the present invention also assure not only an improvement in the thread or yarn but also considerably reduce the formation of lint thereby facilitating the working conditions.

While various liquid and gaseous or paste-like treat ing media for yarn and thread may be employed in connection with the present invention, the treating media mainly used for treating yarn or thread in conection with the present invention are water, wetting agents, anti- Statics, lm forming substances, especially synthetic materials, emulsied minerals, emulsified esters, wax, steam, chlorine, fluorine and hydrogen compounds, if desired under specific consideration of the pH value.

It is, of course, to be understood that the present invention is, by no means, limited to the particular method and devices described herein but also comprises any modifications within the scope of the appended claims.

What I claim is:

1. In combination in a spinning and twisting machine having a twisting zone, passage means for passing a thread or yarn therethrough and also having means for imparting a twist upon said thread during movement through said zone: a spindle rail, supporting means stationarily supported by said spindle rail, su-bstan-tially vertical tubular means extending nonrotatably through said supporting means and having one end connectable to a source of fluid for treating thread and yarn, whorl means rotatably surrounding said tubular means and including means for exchangeably receiving bobbin means, and nozzle means connected to the other end of said tubular means and directed toward said passage means to direct a stream of fluid to said thread as it passes through said passage means and said twisting zone during twisting of said thread so that said uid impinges on said thread and penetrates its fibers simultaneously with said twisting, said nozzle confining said stream to said thread in said twisting zone.

2. An arrangement according to claim 1, in which said nozzle means is axially adjustable in axial direction of and relative to said conduit means.

3. In combination in a spinning and twisting machine: a spindle rail, a tubular supporting member fixedly connected to said spindle rail, conduit means extending nonrotatably t-hrough said tubular supporting member and axially displaceable relative thereto, said conduit means having one end adapted to -be connected with a source of luid for treating threads and yarns, a nozzle connected to the other lend of said conduit means, a whorl rotatably mounted on said tubular supporting member for rotation thereabout, a bobbin receiving member supported by said whorl, auxiliary supporting means spaced from said bobbin receiving member in axial direction of said conduit means and rotatably surrounding the upper end thereof for additionally supporting a bobbin on said bobbin receiving member, spinning ring and traveller means surrounding said conduit means in spaced relation thereto, and thread guiding means axially spaced from said nozzle, and forming with said spinning ring and traveller means a thread twisting zone, said thread guiding means having an opening coaxial with said nozzle to receive a thread passing through sai-d zone during travel of the thread to a bobbin on said bobbin supporting member, said nozzle directing said fluid to said thread as it passes through said opening and in said twisting zone, so that said fluid impinges on said thread and penetrates its fibers simultaneously with said twisting, said nozzle conning said stream to said thread in said twisting zone.

4. In combination in a spinning and twisting machine: a spindle rail, a tubular supporting member xedly connected to said spindle rail, conduit means extending nonrotatably through said tubular supporting member, said conduit means having one end adapted to be connected with a source of uid for treating threads and yarns, a nozzle connected to the other end of said conduit means, a whorl rotatably mounted on said tubular supporting member for rotation thereabout, a bobbin receiving member supported by said whorl, auxiliary supporting means spaced from said bobbin receiving member in axial direction of said conduit means and rotatably surrounding the upper end thereof for additionally supporting a bobbin on said bobbin receiving member, spinning ring and traveller means surrounding said conduit means in spaced relation thereto, and thread guiding means axially spaced from said nozzle, and forming with said spinning ring and traveller means a thread twisting zone, said thread guiding means having an opening coaxial with said nozzle to receive a thread passing through said zone during travel of the thread to a bobbin on said bobbin supporting member, said nozzle directing said fiuid to said thread as it passes through said opening and in said twisting zone, so that said fluid impinges on said thread and penetratesl its fibers simultaneously with said twisting, said nozzle confining said stream to said thread in said twisting zone.

5. An arrangement according to claim 4, in which said conduit means is axially displaceable wtih regard to said tubular `supporting member.

6. In combination in a spinning and twisting machine: a spindle rail, a tubular supporting member fixedly connected to said spindle rail, conduit means extending through said tubular supporting member and nonrotatably relative thereto, said conduit means having one end adapted to be connected with a source of fluid for treating threads and yarns, a nozzle connected to the other end of said conduit means, a whorl rotatably mounted on said tubular supporting member for rotation thereabout, a bobbin receiving member supported by said whorl, auxiliary supporting means spaced from said bobbin receiving mem-ber in axial direction of said conduit means and rotatably surrounding the upper end thereof for additionally supporting a bobbin on said bobbin receiving member, spinning ring and traveller means surrounding said conduit means in spaced relationship thereto, and thread guiding means of trough-shaped contour opening toward said nozzle and provided with a thread passage coaxial -with said nozzle and within the injection range of said nozzle, said thread guiding means being arranged above said nozzle and forming with said spinning ring and traveller means a twisting zone, said nozzle directing fluid to said thread as it passes through said passage during twisting of said thread in said twisting zone, so that said fluid impinges on said thread and penetrates its fibers simultaneously with said twisting, said nozzle confining said stream to said thread in `said twisting zone.

7. An arrangement according to claim 4, in which said thread guiding means is adjustable relative to said conduit means.

S. In combination in a spinning and twisting machine: a spindle rail, a stationary conduit supported by said spindle rail and having one end arranged for connection with a source of iiuid for treating thread and yarn, a nozzle connected to the other end of said conduit means, a hollow tubular thread guiding member arranged in substantially axial alignment with said conduit and having one end within spraying distance of said nozzle, hollow whorl means rotatably surrounding said stationary conduit and having hub means surrounding a portion of said tubular thread guiding member and rotatable thereabout while supporting said tubular member, means for holding said tubular member stationary with regard to said conduit means, said hollow whorl means confining a chamber surrounding said nozzle and provided with peripheral passage means for receiving and passing a thread or yarn therethrough, supporting means carried 'by said tubular member for supporting a cop receiving can, rotatable thread guiding means supported by the upper end of said tubular member, and dish-shaped means .supported by said whorl means and extending radially outxwardly therefrom.

9. The method of fluid treatment of yarn during twisting which comprises twisting said yarn during lineal movement through a twisting zone of a spinning and twisting machine, and directing a stream of treating fluid under pressure at the yarn as it enters said twisting zone during twisting of the yarn so that said uid impinges on said yarn and penetrates the bers simultaneously with said twisting, said stream being confined to said yarn in said twisting zone.

10. The method of increasing the humidity of yarn during twisting which comprises twisting the yarn during linear movement through a twisting zone of a spinning and twisting machine having a pasage at the point where said yarn enters said zone, and directing a stream of humidifying fiuid under pressure at the yarn as it passes through said passage during twisting of the yarn so that said fluid impinges on said yarn and penetrates the fibers simultaneously with said twisting, said stream being confined to said yarn in said twisting zone.

11. In combination in a spinning and twisting machine having a twisting zone, passage means for a thread passing through said zone and a means for imparting a twist to said thread during movement through said zone: stationary conduit means connected to a source of treating fiuid and nozzle means connected to said conduit means and arranged adjacent said twisting zone at said passage means for directing a lstream of treating fluid to said thread as it passes through said passage means during twisting of said thread so that said fluid impinges on said thread and penetrates its fibers simultaneously with said twisting, said nozzle confining said stream to said thread in said twisting zone.

12. In combination in a spinning and twisting machine having a twisting zone, thread guiding means for a thread passing through said zone and a means 4for imparting a twist to said thread during movement through said zone: stationary conduit means connected to a source of humidifying uid and nozzle means connected to said conduit means and arranged adjacent said twisting zone at said thread guiding means for directing a stream` of humidifying fluid to said thread as it passes through said thread guiding means during twisting of said thread so that said fluid impinges on said thread and penetrates its fibers simultaneously with said twisting, said nozzle means being positioned with its longitudinal axis passing through said thread guiding means and confining said stream to said thread in said twisting zone.

References Cited by the Examiner UNITED STATES PATENTS 1,560,575 11/1925 Hohmann 57-35 2,089,778 8/1937 Whitehead 57-35 2,123,235 7/1938 Dreyfus 57-35 2,671,304 3/1954 Rowedder 57-35 X 2,715,308 8/1955 Soussloff et al 57-58.65 2,803,939 8/1957 Steele 57-58.65

FOREIGN PATENTS 598,468 6/1934 Germany.

225,559 4/ 1925 Great Britain.

665,594 1/1952 Great Britain.

MERVIN STEIN, Primary Examiner.

Claims

9. THE METHOD OF FLUID TREATMENT OF YARN DURING TWISTING WHICH COMPRISES TWISTING SAID YARN DURING LINEAL MOVEMENT THROUGH A TWISTING ZONE OF A SPINNING AND TWISTING MACHINE, AND DIRECTING A STREAM OF TREATING FLUID UNDER PRESSURE AT THE YARN AS IT ENTERS SAID TWISTING ZONE DURING TWISTING OF THE YARN SO THAT SAID FLUID IMPINGES ON SAID YARN AND PENETRATES THE FIBERS SIMULTANEOUSLY WITH SAID TWISTING, SAID STREAM BEING CONFINED TO SAID YARN IN SAID TWISTING ZONE.