US2424489A

US2424489A - Thread advancing reel

Info

Publication number: US2424489A
Application number: US602465A
Authority: US
Inventors: Adrian J L Moritz
Original assignee: American Enka Corp
Current assignee: Akzona Inc
Priority date: 1945-06-30
Filing date: 1945-06-30
Publication date: 1947-07-22
Anticipated expiration: 1964-07-22

Description

July 22 1947- A. J. L. MoRrrz THREAD ADvANcING REEL 6 Sheets-Sheet 1 Filed June 30, 1945 i IN V EN TOR.

Adrian lL/Ilaria BY July 22, 1947- A. J. L. MORITZ 2,424,489

THREAD ADVANCING REEL Filed June 50, 1945 6 Sheets-Sheet 2 INVENTOIL' y 'BQMWJHMZ July 22, 1947.

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' r r r r r r r r r r r rr 6 Shee'ts-Shee 3 INVENTOR.

Adrien L /offiz July 22 1947 A. J'. l.. MORITZ THREAD ADVANCING REEL 6 Sheets-Sheet 4 Filed June 30, 1945 IN V EN TOR.

B {Idn'qgv /larz lll I-il lll-MINI Ilm Il* l l A A A l l A A .Q

" Arron/vtr July 22, 1947. A- L L, MORlTZ 2,424,489

THREAD ADVANC ING REEL Filed June so, 1945 e sheets-sheet 5 IN VEN TOR.

drl'anJL/lfonz BY ATTORNEY July 22, 1947- A. J. L. MORI-rz 2,424,489

THREAD ADVANCING REEL Filed June 30. 1945 6 Sheets-Sheet 6 INVENTOR .ldrianJL/Ilon'z guide which was maintained stationary.

Patented July 22, "1947 THREADr ADVANCING REEL Adrian J. L. Moritz, Enka. N. C., aaaignor to American Enka Corporation, Enka, N. C., a

corporation o! Delaware Application June 30, 1945, Serial No. 602,465

The present invention relates to the handling y of strandular materials and more particularly to a method and apparatus for processing freshly spun'synthetic threads such as rayon, nylon, Vinyon. casein and the like.

In one specific application, the invention will be described in connection with the manufacture of viscose rayon as this type of process is more generally used than the other processes.

During recent years the quality of viscose rayon has improved greatly ts a result of technclogicai advances and refinements in the tech- 4nique of handling and aftertreating freshly formed thread. One of the important advances has been the substitution of rotatable threadguiding surfaces Vfor the old type friction thread These rotating surfaces have a distinct advantage over the stationary guide in that theV stretch on the thread can be predetermined and maintained as desired by controlling the peripheral speed of the thread-guiding surface.

At first the thread-guiding surface was provided on a freely rotatable roller or a driven roller commonly called a godet. 'I'hese godets have been, and are being, used commercially in the viscose plants producing rayon according to the discontinuous method wherein the acid thread is initially collected in a centrifugal bucket or on a bobbin prior to aftertreatment.

Another process Iwhich has been more recent- 1y developed commercially is the continuous process which provides for the treatment of the viscose thread prior to its initial collection in package form. In order to properly enect the various processing steps, a suitable thread-storage. thread-advancing device had to be devised. This took several forms but all involving the same principle, namely, the use ofangle-axis rollers. Two rollers. the axes of which were offset and spacedl apart. or a reel having interdigitating elements, were employed. In both of these cases, however, the devices were long enough to support the thread in a multiplicity of helices so that the thread could be given one or more treatments thereon and the helices were caused to move laterally of the devices by the offsetting of the axes, i. e., the helices moved in the direction of the convergence of the axes.

Although there were some drawbacks to the 14 Claims. (Cl. iBS-71.6)

continuous process, the utility thereof was recognized in the trade as the product has, in some respects, more uniform chemical and physical properties.

As an outgrowth of the continuous process lnvolving the use of thread-storage. thread-advancing devices, it was determined that these `same devices could be adopted or substituted for ythe usual godets and thereby effect the necessary stretching of thethread while giving it some of the treatments prior to collection in the bucket .or on the bobbin. Such a process might be termed a semi-continuous"A one.

In. the two-bath process for the production of high tenacity thread for Vuse as reinforcing elements in the manufactuer ot rubber articles such as cord tires and the like, the use of these threadstorage. thread-advancing devices has particular advantages either in lieu ofV godets or in addition thereto. The freshly formed thread is given suillcient` time to reach a slow rate of regeneration on these devices prior to the time it is passed through the second hot bath. This gives the nal product more even properties and a higher fatigue life.

As can be expected during the evolution of an industry, it passes through various constructive stages before it reaches a highly efficient state. Whereas, the continuous process is an excellent system as a whole, the thread-storage, threadadvancing devices are mechanically complicated and therefore are expensive to manufacture, in- A stall, and maintain. Wear and tear on the parts are especially evident in these systems because of the nature oi.' chemicals that have to be used. The operation of the devices and replacement of the parts are dim'cult and accordingly, the desire and need for a simplified thread-storage, threadadvancing device which is at least as efilcient as those presently known, are obvious.

It is therefore the object of the present invention to provide a novel thread-storage, threadadvancing device that can be employed in any type of system where the handling of strandular materials is involved.

The invention further contemplates a process in which thread is advanced through a treating or storage zone in the form of a multiplicity of helices which are guided laterally during their advancement.

Another object oi' this invention is the provision of a cage member which rotates a series o: laterally spaced helices about a single axis and coacts with a complementary means at the periphery of the cage to physically guide the thread in the form of a multiplicity of helices laterally of the cage member.

The invention has, as an additional object, the provision of a continuous spinning system in which one or more thread-storage, thread-advancing devices are employed for processing freshly formed viscose rayon threads prior to their collection in the form of a. package.

Other objects and advantages will be apparent from the following detailed description when considered in connection with the accompanying drawings wherein:

Figure 1 is a longitudinal sectional view through a reel constructed in accordance with this invention;

Figure 2 is an elevational view of one of the spur gears illustrating the interrupted sawtoothed thread formed on the crowns of the gear teeth;

Figure 3 is a transverse sectional view throughl the reel illustrated in Figure 1;

Figure 4 is a fragmentary elevational view of the outer end of the reel shown in Figure 1;

Figure 5,.is a longitudinal sectional view of a vmodified form of reel constructed in accordance with this invention;

- Figure 6 is an elevational view of one of the spur v gears utilized in the modified construction illustra't'ed'in Figure 5 with the bore formed therein being shown in dotted lines;

`Figure 7 is a further modified form ofv reel constructured in accordance with the present invention, the reel being provided with a lateral series of spur gears for permitting a plurality of zones of treatment of strandular material on one reel;

Figure 8 is a diagrammatic view common to each of the forms of reels referred to, illustrating th'e position of the strandular material as it is advanced longitudinally of a reel when the relative motion of the parts thereof is such as to maintain a spacing of th'e convolutions of strandular material the full distance between the threads 'of the gears; and

Figure 9 is a diagrammatic view of a modied form of Figure wherein the bars of the cage member converge and the spur gears are tapered so that the strandular material is permitted to contract thereon.

In referring to th'e drawings in detail, numeral `I8 designates a driving shaft having keyed thereto. for rotation therewith, a circular front plate II of an outer cage designated generally as I2. Plate I I is provided with a central opening I3 for receiving the reduced portion Il of shaft I0. Crown nut I8 is threaded upon portion I4 for retaining the outer cage in position. A tubular shaft I6 is mounted upon shaft I0 for relative rotary motion with respect thereto. Shaft I9 is formed with a flange I1, which' bears against hub I8 of the rear circular plate I9 of cage I2. Circular plates I I and I9 are provided with openings and 2| adjacent the respective peripheries thereof. vBars 22 having ridged outer surfaces 23, extnd between plates II and I9, the front portions of each bar being reduced as at 2l and riveted into place within openings 20. Each of the bars 22 have reduced threaded portions 25, extending through openings 2| .in plate I9, and nuts 23 are threaded thereon. The outer cage I2 Il thus formed as a rigid construction, in which the plates thereof are securely held in spaced position by means of the bars 22. and the driving of shaft I0 will cause the rotation of the cage and relative rotation of the cage with respect to tubular shaft I8 when shaft I6 is maintained stationary or is driven at .a speed different from or in a direction counter to shaft I0. A gear 2l is keyed to shaft I6 for effecting the rotation thereof by a suitable source of power (not shown).

Inner

circular plates

28 and 29, provided with central openings, are tted over and keyed to tubular shaft I6, plate 29 being pressed against flange I'I of tubular shaft IB by means of a spacer sleeve 30 against the edge of which plate 28 is pressed by means of a nut 3I threaded upon the end of the tubular shaft I6.

Plates

28 and 29 are formed with a series of

openings

32 and 33. Axles 34 having reduced ends 38 are secured in

correseponding openings

32 and 33 of

plates

28 and 29 and spur gears 39 are mounted for rotation upon said axles. Spacers 31 are provided for maintaining spur gears 36 in the same plane with respect to each other. Axles 34 are so positioned inwardly of bars 22 that the teeth 38 of spur gears 38 when meshed with the bars will extend between the bars to such extent that the saw-toothed screw-thread sections 39 cut on the crowns of th'e teeth will project beyond the circumference of the cage as formed by the bars 22 with the bases of the threads just within the cage circumference.

Thread sections 39 are so cut upon the crowns of the teeth 38 oi' each of the spur gears that they jointly present on each' gear an interrupted screw-thread as illustrated in Figure 2. While other types of screw-threads may be utilized the saw-toothed thread has been found to give very satisfactory results, in that, substantially the entire threaded surface of each gear is made up of faces sloping toward the delivery end of the reel. The dimensions of the saw-toothed screwthread may vary depending on the number and size of the spur gears, e. g., where four spur gears are employed, the saw-toothed screw-thread may vary from n2" to V5 in height and 1/8" to V4" in width.

As will appear from Figure 3, four spur gears 39 may be employed in the nature of planets meshing with the cage I2 as a ring gear. While it has been found that the use of four spur gears is highly satisfactory, the number of spur gears may be varied so long as a sulcient number of spur gears are utilized to effect the desired advancement of the strandular material in helical form longitudinally of the reel.

In the operation of the reel as thus described continuous strandular material, such as freshly spun rayon yarn passed from a coagulating bath, is delivered to a position on the surface of the reel immediately adjacent the rearmost thread convolution as illustrated in Figure 8. As the outer cage I2 is continued to be rotated and tubular shaft I6 with

plates

28 and 29 and axles 34 are either maintained stationary or rotated relative to cage I2, the tendency to wind the continuous thread upon itself on the bars 22 of the cage is prevented by the lateral guiding of the strandular material, i. e., longitudinally of the reel toward the end plate II. If, as shown in Figure 3, the cage is rotated in a clockwise direction each tooth of a given spur gear meshing within the space Ibetween succeeding bars will present a section of saw-toothed thread sloping toward the front plate II and as each following thread section moves outwardly from between thread sections on the teeth of the bars the sloping surface of its teeth will engage the strandular material and gently move it toward the delivery end of the reel. Since the each spur gear forms an interrupted screw-thread around the gear, each succeeding tooth of the gear will present a thread section slightly advanced beyond the section which effected the movement of the preceding portion of strandular material. Each of the spur gears as shown are formed with twelve teeth and therefore when the relative positions of advancement between the portions of the strandular material first engaged by the gear and the portions engaged by the twelfth tooth will be one screw-thread apart. The movement of each portion of the strandular material by the screw-thread section is from the position where it is engaged by the sloping thread surface to a position immediately overlying the -base of the thread. The particular spur gear 36 underlying the point of feed of the thread to the reel will depend upon whether the tubular shaft` I6 is being held stationary, rotated at a different speed but in the same direction of the cage, or whether it is being rotated in a counter direction. However, since the gears are arranged with the interrupted thread thereon one-fourth turn in advance of the thread on the next succeeding gear in' the sequence the apexes of the screwthread that the projection of the thread sections of the following gear between the bars will cause the engagement of the thread Iby the teeth at a point near the apex thereof. Therefore as the thread sections move outwardly the strandular material is again moved longitudinally of the reel a distance equal to that between the point of its engagement with the slope of the thread and a point immediately above the base of the slope. As the rotary movement of the reel is continuous and the strandular material is advanced by the projection of the respective thread sections of the gears from between the bars 22, it will be apparent that a complete revolution of the reel will result in the movement of the strandular material from the position where it initially engaged the reel and that this longitudinal displacement of the strandular material will result in the maintenance oi' ahelix of the material on the reel by the continuous feed thereof to an end of the the opposite end of the helix. For any given pitch of the saw-toothed thread, the space between each convolution is controlled and determined by the relative speeds of the cage and spur gears. l. e., as the difference in relative speeds increases, the spacing increases. The strandular material delivered from the reel may be directed to a point of collection or it may be subjected to treatment any one of the well known treating devices. 'I'his is particularly important when the reels are being utilized in the production of viscose rayon.

Figures and 6 illustrate a reel which operates on the same principle as the reel shown in Figures 1-4, inclusive. However, the drive shaft 40 of this modified form is reduced at 4i and receives a hub 42 of a single disc 43 to which a series of spur gears 44 are attached by a stub axle 45 the end of which is screwed into disc 43 as indicated at 46. Disc 43 is keyed to the shaft and secured into position by a crown nut 41. A sleeve 48 is mounted on each axle for properly spacing the end thereof to accommodate the respective spur gears 44 and spacers 49 are of the succeeding gear will be so locatedl the stub axles.

employed to properly align the spur gears on In the modification shown in Figure 5 a tubu- .lar shaft 50 is mounted for rotation upon shaft 'ings E4 adjacent the periphery thereof. A series helix during continuous delivery of the same from-` upon a similar reel or reels, or upon of spaced bars 55 are anchored within the openings 54 and are secured therein by nuts 54. In case there is a tendency for the yarn leaving the reel to become entangled in the spur gears 44, particularly duringv the threading-up stage, bars 55 may be extended and bent toward the center of the reel to act as guards. As an alternative, a circular disc-like shield may be fastened at its periphery to the outer ends of bars 55. Each of the spur gears 44 is identical in formation with the spur gearsA 36 described in connection with Figures l-A, inclusive, except for the counterbore 51 at the outer end of the center bore thereof which enlargement is adapted to receive the head 58 of the stub axle 45.

The modified form of reel illustrated in Figure 5 operates in the same manner as the reel illustrated in`Figures 1-4, inclusive, with the exception that the outer member carrying the bars 55 is driven by the tubular shaft while the inner member carrying the spur gears 44 is driven by the circular shaft. It is clear, therefore, that in order for the reels of the two forms to operate identically the shafts 40 and 50 of the form shown in Figure-5 are driven in a direction opposite to the correthree separate helices longitudinally along the i cage 6I so that various treatments of the strandular material may be effected on ythe same reel. In this modified form front and rear discs 62 and 63 are mounted in spaced relation upon tubu-v lar shaft 60 and they have secured therein axlesl-v 64 upon which are mounted for free rotation spur gears 65. The spur gears are maintained in proper alignment by means of spacers 66. Spur gears 65are identical in construction with spur gears 36 in the form illustrated in Figures 1-4, inclusive. The operation of the reel illustrated in Figure 'l is the same as the operation of the reel of Figures v1-4, inclusive, with the exception' that a godet (not shown) may be utilized to transfer the strandular material as it is discharged at the end of the first helix to the point of feed of the strandular material to the second helix and another godet (not shown) may be utilized to effect the transfer of the strandular material from the end of the second helix to the point of feed of the third helix. The number of helices employed may be varied and the reel shown in the modification of Figure 7 maybe utilized in conjunction with the reels shown in the other forms when additional treatments of the strandular material are to be effected.

In the various forms of reels heretofore disclosed, the bars of the outer cage members define a cylinder and thespur gears are also of a cylindrical configuration. Such constructions effect no stretching or let-off on the reels per se, although any desirable stretching or contraction may be accomplished between the reels by driving in Figure I is similar 5. l

Figures 1 4, l

the reels at different peripheral speeds or by introducing godets therebetween.

The invention further comprehends modifying the reels by mounting the bars of the cage members so that they converge and if the degree of convergence makes it necessary, then the spur gears can be tapered to a, corresponding extent. Depending on the direction of the convergence, i. e., whether the bars diverge or converge from R the adit to the exit end of the reel, the yarn will be stretched or permitted to contract.

A reel of the type shown in Figure 9 has parvand tubular shaft H is mounted on shaft 69 for relative rotation therewith. A gear 12 is keyed to tubular shaft 1I for effecting rotation thereof.

` Y which in turn drives spur gears 13.

As stated above, the present invention has particular utility in the treatment of synthetic yarns, such as viscose in the wet state, although the principle here involved may be adapted to the processing ofdry yarns. It is to be understood that various modifications may be made withoutl departing from the spirit of the invention, as the scope thereof is to be limited only to the extent of the appended claims.

What is claimed is:

1. A device adapted for use in the handling of strandular material, comprising a rotatably mounted outery cage for supporting helically arranged strandular material, a second member provided with at least one rotatably mounted spur gear arranged within the outer cage, said spur gear having sections of saw-tooth screwthreads on thecrowns of the teeth to thereby form an interrupted screw-thread, the teeth of the spur gear being of a. height to protrude through the outerY cage member when fully meshed therewith.

2. Athread-storage, thread-advancing device comprising a cage member consisting of a series of fixed bars spaced in a circular manner, a. shaft mounted concentrically of said member adapted to rotate the same, at least one spur gear having a screw-thread on the periphery thereof and mounted within the area defined by the cage member on a shaft parallel to the axis of the cage member, the teeth of said gear meshing with the bars of the cage member upon relative rotation therewith, said teeth extending beyond the periphery defined by the bars whereby convolutions of yarn are advanced progressively laterally by means of the screw-thread.

3. A thread-storage, thread-advancing device comprising a cage member consisting of' two disc members at each end thereof connected by a series of bars spaced around the periphery of the disc members a shaft mounted concentrically of said cage member adapted to rotate the same, at least one spur gear having a screw-thread on the periphery of the teeth and mounted within the area defined by the cage member 0n a shaft parallel to the axis of the cage member, the teeth of said gear meshing with the bars of the cage 8 member upon relative rotation therewith, said teeth extending beyond the periphery denned by the bars whereby convolutions of yarn are advanced progressively laterally by means of the screw-thread.

4. A thread-storage, thread-advancing device comprising a rotatably mounted outer cage member consisting of a series of fixed bars spaced in a circular manner, a second member provided with several rotatably mounted spur gears arranged within the outer cage, said spur gears having saw-tooth screw-threads on the crowns of the teeth to thereby form an interrupted screwthread, the teeth of said spur gears meshing with the bars of the cage member upon relative rotation therewith, said teeth extending beyond the periphery dened by the bars whereby convolutions of yarn are advanced progressively laterally of the cage member by means of the screw-thread.

5. A thread-storage, thread-advancing device comprising a rotatably mounted outer cage member formed of a disc having a plurality of circularly arranged, spaced bars anchored around the periphery thereof, a second member provided with several rotatably mounted spur gears arranged within the outer cage, said spur gears having saw-tooth screw-threads on the crowns of the teeth to thereby form an interrupted screwthread, the teeth of said spur gears meshing with the bars of the cage member upon relative rotation therewith, said teeth extending beyond the periphery defined by the bars whereby convolutions of yarn are advanced progressively laterally of the cage member by means of the screw-thread.

6. A device adapted for use in the handling of freshly formed rayon yarn comprising, a member for supporting yarn in helical form about the periphery thereof, said member having a series of annularly arranged longitudinally extending spaced narrow bars stationary with respect to one another, means for rotatably supporting the member, and means within the member mounted to project outwardly between the spaced bars when the member is rotated, said means being provided with a plurality of faces sloping in the same direction, whereby yarn supported on the member will be contacted by the faces and will be moved transversely as the faces move outwardly from between the bars.

7. A device adapted for use in the handling of freshly formed rayon yarn comprising, an outer member formed with a circular plate to which longitudinally spaced bars are attached in annular formation adjacent the periphery thereof, means for rotatably supporting said outer member, a spur gear rotatably mounted within the outer member with the teeth thereof meshing between the spaced bars, the teeth on. the gear having transverse saw tooth thread sections, said thread sections on the gear teeth when fully meshed between respective pairs of bars extending beyond the outer surfaces of the bars, whereby movement of the outer member relative to the gear will cause yarn encircling the outer member to move longitudinally thereof.

8. A thread-storage, thread-advancing device comprising a rotatably mounted outer cage member formed of a disc having a plurality of circularly arranged, spaced bars anchored around the periphery thereof, a second. member provided with rotatably mounted spur gears arranged within the outer cage, a shaft mountedl concentric to the cage member for supporting the second member and rotating the same relative to the cage, a tubular shaft mounted on said shaft for tooth screw-threads on the crowns of the teeth to thereby form an interrupted screw-thread, the teeth `of said spur gears meshing with the' bars of the cage member upon relative rotationther'ewith, said teeth extending beyond the periphery delined by the bars whereby convolutions of vyarn are advanced progressively laterally of the cage member by means ofthe screw-thread.

9. A conical thread-storage, thread-advancing device comprising a rotatably mounted outer cage member consisting of a series of fixed bars spaced in a circular manner, said bars converging toward io of freshly formed rayon yarns comprising, a drive shaft, a tubular shaft mounted thereon. an

' outer member formed with aicircular plate proone end to define a conical cage, a second member provided with several rotatably mounted tapered spur gears arranged within the outer cage, said sp'ur gears having saw-tooth, screw threads on the crowns of the teeth to thereby form an interrupted screw-thread on the spur gears tapering in the samedirection as the convergence of the bars, said teeth extending beyond the periphery defined by the bars whereby convolutions of yarn are advanced progressively laterally of the cage member by means of the screw-thread and depending on the lateral direction of the yarn,`the length of theyarn is altered.

10. A device for use in the handling of freshly formed rayon yarns comprising, a drive shaft, a tubular shaft mounted thereon, an outer membei' formed with a plate keyed to one of the shafts, a plurality of circularly arranged spaced bars having their ends anchored in the plate, a second member arranged within the outer member and keyed for rotation with the other shaft, said second member being formed with a disc having a stub axle extending therefrom, and a thread advancing gear mounted on the axle, said gear having teeth meshing with the spaced bars of the outer member, the teeth on the gear having transverse saw tooth' thread sections, said sections of threads on each of the gear teeth when fully meshed between respective pairs of bars extending beyond the outer surfaces thereof, whereby relative rotation of the drive shaft and the tubular shaft will cause yarn encircling the outer member to move longitudinally thereof.

11. A cantilever device adapted for use in the handling of freshly formed rayon yarns, cornprising a drive shaft, a tubular shaft mounted thereon, an outer member formed with a circular plate provided with an aperture to nt over one of the shafts, means for securing the plate in fixed position relative to said shaft, a plurality of circularly arranged spaced bars having their ends anchored in the plate, a second member arranged within the outer'member and keyed for rotation with the other shaft, said second member being formed with a disc having axles extending therefrom at points adjacent its periphery and a thread advancing member mounted on each of the axles, each of said members being formed with teeth meshing with the spaced bars of the outer member, the teeth on each member having transverse saw tooth thread sections sloping in the direction of the unsupported end of the device, and complementing one another to form an interrupted screw thread, said sections of threads on each of the teeth when fully meshed between respective pairs of bars extending beyond the outer surfaces thereof, whereby relative rotation of the drive shaft and tubular shaft will cause yarn encircling the outer member to move longitudinally thereof.

l2. A device adapted for use in the handling vided with an aperture to fit over one of the shafts. means for securing the plate in fixed position relativeto said shaft, a plurality of circularly arranged spaced bars having their ends anchored in the plate, a second member arranged within the outer. member and keyed for rotation with the other shaft, said second member being formed with a disc having apertures adjacent its periphery, axles secured within the openings in the discs, and a spur gear mounted on each of the axles, each being formed with teeth meshing with the spaced bars of the cuter member, the teeth on each gear having transverse saw-tooth thread sections which complement one another to form an interrupted screwthread, said spaced bars each having a ridged outer surface and the sections of threads on each of the teeth when fully meshed between respective pairs of bars extending beyond the ridged surfaces thereof, whereby relative rotation of the drive shaft and the tubular shaft will cause yarn encircling the outer'member to move longitudinally thereof.

13. A thread-storage, thread-advancing reel adapted for use in the handling of freshly formed rayon yarns comprising, a drive shaft having an end portion of reduced diameter, a tubular shaft mounted thereon, an outer cage member formed with a circular front plate provided with an ap-v erture to fit over the reduced portion of the drive shaft, means for securing the front plate in fixed position upon the shaft, a rear plate spaced from the front plate and having a bearing surface encircling the tubular shaft, a plurality of circularly arranged spaced bars having their respective ends anchored in the front plate, said bars being provided with reduced portions extending through apertures in the rear plate, means for securing the bars within the apertures in the rear plate, a second member arranged within the outer cage and keyed for rotation with the tubular shaft, said second member being formed of front and rear discs each having apertures arranged adjacent its respective circumference, axles provided with -reduced end portions positioned within the openings in said discs, and a thread-advancing member mounted on each of the last mentioned shafts, said members being formed with teeth meshing with the spaced bars of the outer cage, the teeth on each member having transverse saw-tooth thread sections sloping in thev direction of the front plate and complementing one another to form an interrupted screw-thread, said spaced bars of the outer cage each having a ridged outer surface, and the sections of threads on each of the teeth when fully meshed between the respective pairs of bars extending beyond the ridged surfaces thereof, whereby relative rotation of the drive shaft and the tubular shaft will cause yarn circling the outer cage to move longitudinally thereof.

14, A device adapted for use in the handling of freshly formed rayon yarn comprising, a member for supporting yarn in helical form about the periphery thereof formed with a series of annularly arranged longitudinally extending spaced bars having yarn contacting surfaces, means for rotatably supporting the member, and means within the member mounted to project outwardly between the spaced bars when the member is rotated. said means being provided with a plurality ot yarn contact faces sloping in the same direction, whereby yarn supported on the member will be contacted by the faces and will be moved transversely as the faces move outwardly from between the bars. said contact faces having a. total yarn engaging area at least equivalent to the yarn contacting surfaces oi' the bars.

ADRIAN J. L. MORITZ.

REFERENCES CITED The following references are of record in the le of this patent:

. Number UNITED STATES PATENTS Name Date Torrence et al. July 14, 1942 Furness Mar. 31, 1942 Helm July 11, 1939 Tprrence et al Sept. 2, 1941 Kuebusch June 17, 1941 Willheim Aug. 28, 1928 Lovett June 11, 1940 Ewing June 23, 1942 Furness June 12, 1945 Pollak Sept. 18, 1945 Alden Mar. 1, 1932 Modighani Feb. 13, 1945