US2345544A

US2345544A - Yarn winding

Info

Publication number: US2345544A
Application number: US447481A
Authority: US
Inventors: Worthington Hood
Original assignee: EI Du Pont de Nemours and Co
Current assignee: EIDP Inc
Priority date: 1942-06-17
Filing date: 1942-06-17
Publication date: 1944-03-28
Anticipated expiration: 1961-03-28

Description

March 28, 1944.

H. WORTHINGTON YARN WINDING Filed June 17, 1942 6 Sheets-Sheet l INVENTOR Hood Vlqrtlzil g Ion I Q l ATTORNEY I March 28, 1944. I wORTl-NGTQN 2,345,544

YARN WINDING Filed June 17, 1942 6 Sheets-Sheet 2 ATTORNEY March 28, 1944. H ORTHINGTON 2,345,544

YARN WINDING Filed June 1'7, 1942 6 Sheets-Sheet 5 ml'tllilgtoll INVENTORQ ATTQRNEY March 28, 1944.

H. WORTHING TON YARN WINDING Filed June 17, 1942 6 Sheets-Sheet 4 H0 0 d mlfhilklg'toll INVENTOR A RN March 28, 1944. H. WORTHINGTON 2,345,544

YARN WINDING Filed June 17, 1942 6 Sheets-Sheet 5 l3:16 I I 15 Hood Wat-ma ma ATTORNEY' March 28, 1944. H. WORTHINGTCN YARN WINDING Filed June 1'7, 1942 6 Sheets-Sheet 6 9 i 0 law m w 5 m fww m a m m m l t 0 H|ILI W/ r 4 N25. 0 v if H 1 V 4. i U

Patented Mar. 28, 1944 YARN WINDING Hood Worthington, Wilmington, DeL, assignor to E. I. du Pont de Nemours & Company, Wilmington, Del., a, corporation or Delaware Application June 17, 1942, Serial No. 447,481

Claims.

This invention relates to yarn winding and, more particularly, it relates to a new and improved wound yarn package and method and apparatus for obtaining the same. More specifically, the invention relates generally to a yarn package comprising a plurality of yarns wound substantially in side-by-side relationship in a new manner on to a yarn support, and a new and unique method and apparatus for winding the same.

It has been known, heretofore, to wind 2. plurality of yarns in substantial side-by-side relationship on to a yarn support. It has also been known to traverse said plurality of yarns across the full length of the winding surface.

Such previously known methods for winding and traversing a plurality of yarns on to a single yarn support were particularly defective if the yarns were made up of parallel bundles of untwisted filaments. If the plurality of untwisted yarns is laid down on the yarn package in a single bundle, it is diificult to separate the yarns again when they are unwound, since the filaments of the several yarns will entangle with each other. If the yarns are maintained separate from each other as they are wound and traversed from end to end of the yarn package, the extremities, or shoulders, of the package are excessivelysoft.

It is an object of the present invention to pro- .duce a firm-shouldered yarn package comprising a plurality of yarns wound in side-by-side relationship and free from objectionable intertwining of yarn filaments of the respective yarns.

It is another object of the present invention to produce a firm-shouldered yarn package comprising a plurality of yarns wound in side-byside relationship and traversed from end to end of the package, said package-being free from objectionable intertwining of yarn filaments of the respective yarns.

It is another object of this invention to wind a plurality of yarns in side-by-side relationship on to a yarn support from which the wound yarns can be removed wit dation.

The objects of this invention may be accomplished, in general, by simultaneously winding and traversing a plurality of yarns on to a yam support withthe yarns spaced from each other on the central portion of the support and substantially contiguous with each other adjacent to th ends of the support, the relative position of the yarns to each other being the same in both directions of traverse.

a minimum of yarn degra- Other objects of the invention will appear hereinafter.

The details of the invention will be more clearly apparent by reference to the following detailed description when taken in connection with the accompanying illustrations, in which:

Figure 1 is a front elevational view of one construction of apparatus suitable for use in carrying out the present invention.

Figure 2 is an end elevational paratus shown in Figure 1.

Figure 3 is an enlarged front elevational view of a yarn guide constructed in accordance with the details of the invention.

Figure 4 is an end elevational view of the guide shown in Figure 3.

Figure 5 is a front elevational view of a modified yarn guide for use in accordance with the invention.

view of the ap- Figure 6 is an end elevational view of Figure 5.

Figure 7 is a front elevational view of a modified form of yarn traversing apparatus for use in the present invention.

Figure 8 is an end elevational view of the apparatus shown in Figure 7.

Figure 9 is a front elevational view or the traversing apparatus shown in Figure 7 as the package approaches completion of wind.

Figure 10 is an end elevational view of the apparatus shown in Figure 9.

Figure 11 is a diagrammatic front elevational view of a modified form of yarn traversing mechanism for'use in winding fouryams.

Figure 12 is an end elevational view of the apparatus shown'in Figure 11.-

Figure 13 is a front, elevational view of still another modified form of yarn winding and traverslng apparatus constructed in accordance with the present invention.

Figures 14, 15 and 16 are enlarged front elevational views of modified forms of yarn guides.

Figure 17 is an end elevational view of still another modified form Of yarn winding and traversing apparatus constructed, in accordance with the present invention.

Figure 18 is a top plan view of the apparatus shown in Figure 17.,

Figure 19 is a front elevational view of the ap-' paratus shown in Figure 17.

Figure 20 is a diagrammatic side elevational view showing a yarn package wound in accordance with the present invention,

Referring to Figures 1 and 2 of the drawings, reference numeral 2| designates two yarns drawn from a synthetic yarn spinning apparatus, or

, other source (not shown) by means of feed roll 23. The yarns 2| are fed to a yarn guide 27 comprising two spaced

yarn guiding elements

25 and 26 and a yarn separating pin 29. The yarns 2| are passed through the guide slot defined by guiding

elements

25 and 26, one yarn being passed,

on each .side of separating pin 29. Yarn guide 2! is oscillated substantially longitudinally of the axis of yarnpackage 33 being formed on yarn support 31. The 'yarn guide 2'5 is oscillated by means of pivoted bar 3!,reciprocating bar 35, and grooved cylinder cam 33 in-a known manner to traverse the yarnbeing wound on the package 39.

As the yarn guide 21 is oscillated, it is tilted at the ends of the traverse stroke. The pin 29 maintains the yarns 2| separated from each other across the space between the guide elements more be noted that the yarns are not caused to cross each other but maintain the same relative position to each other in both directions of traverse.

Figures 3 and 40f the drawings show in greater detail the yarn guide 21. The separating pin 29 is preferably positioned sufficiently above

guidingelements

25 and 26 to bring .the yarns into contiguity with each other when the guide 21 is tilted at the ends of the traverse stroke,

Figures 5 and 6 show a. slightly 'modifled form of traverse guide 21 in which the

yarn guiding elements

25 and 26 as well as the yarn separating member 29 all consist of pins which are spaced from each other.

Referring to Figures '7 to of the drawings, two yarns 2| are passed on opposite sides of separating pin 42 and between spaced

yarn guiding elements

43 and 45. The yarn guiding member, generally designated by 4|, is reciprocated back and forth adjacent yarn support 83 by means of reciprocating traverse bar 44. The yarn guiding member 4| and the guiding

elements

43 and 45 receive a purely reciprocating motion, as is clearly shown in Figure 7, during the first part of the winding operation. As the yarn package increases in size, the yarn guiding

member including elements

43 and 45 is caused to tilt at the ends of the traverse strokes by means of pivoted track 41, cam 53 and cam follower 55. The yarn guiding member 4| is provided with a roller 48 operating in a' groove in track 41. The roller 49 is positioned at the end of a small bell crank lever 5| which in turn is connected to the yarn guiding member 4|. As the yarn package builds up on yarn support 63, the swing arm 59 will move away from the surface drive roller 6|. The cam 53 is positioned on an arm 51, which in turn is connected .to swing arm 59. The cam 53 will, therefore, be drawn under the cam follower 55 causing track 41 to be pivoted about its pivot port from one extreme to the other extreme of the package. As the yarn package increases in size, however, the-yarn guiding member M will tilt inwardly thereby causing the yarns to be laid down in contiguity at the ends of the package, but in spaced relationship to each other in the central portion of the package. In this modification, the ends of the yarn package are also gradually beveled as shown in Figure 9.,

Referring to Figures 11 and 12 of the drawings, four yarns 2| are passed from the feed roll 23 to a yarn guide comprising two spaced upper yam guiding elements 8| and83 and two spaced lower guiding elements 85 and 8! as well as a centrally located yarn separating pin 9|. The yarns passing between the feed 'roll 23 and the yarn guide are passed about a series of fixed pins ll, 73, lb and Ti positioned on a support 19. The yarn 2i passed about fixed pin H is passed over spaced yarn guiding elements 8i and 81. The yarn 2| which is passed about fixed pin 13 is passed about the lefthand side (as viewed in the drawings) of pin 9|. The yarn passing about fixed pin 15 is passed about the righthand side of pin ill and the yarn passing about fixed pin ll passes over spaced yarn guiding elements "13 and 15. In this manner, the four yarm are clearly separated from each other when the yarn guide composed of the guiding elements and separating member is positioned against the central point of the yarn package. The yarn guide is traversed by means of an oscillating or curvilinear motion whereby the guide is tilted in the same manner as above described with reference to Figures 1 and 2. At the ends of the traverse strokes, due to the tilting of the yarn guide, the plurality of yarns are all laid down in close contiguity with each other to form a firm shoulder on the yarn package 33. The yarn package 93 may be rotated by means of a surface drive roll 95. The yarn guide may be given an oscillating or curvilinear motion in any desired manner, for example, by means of apparatus such as shown in Figures land 2 or 7 to 10 of the drawings.

Figure 13 of the drawings illustrates a modification of the invention in which four yarns are wound and traversed on to a package by means of only two fixed pins I0! and I03. Two of the yarns 2| are passed about fixed pin IM. These two yarns are split, one of them passing over spaced yarn guiding pins Hi5 and ll 0 and the other passing on the lefthand side of seppackage H3 may be rotated by means of surface point 50. As clearly shown in Figures 9 and 10,

drive roller. H5. The several yarn guiding pins I05, I01, I09 and H0 are tilted at the ends of their traverse strokes in the manner illustrated 2,845,544 yarn separating pin I25 is positioned between these members. I Figure of the drawings is a modified form of yarn guiding member in which two spaced yarn The yarns may be passed to four members and preferably slightly closer to the pins I35 and I31 than to elements I33 and Figure 16 illustrates another modified form of guide in which elongated yarn guiding elements I45 and I41 are positioned above spaced yarn guiding pins I43 and III, Although this is a somewhat obvious modification of the other elements shown, it is illustrative of the many modifications which can be made in the apparatus of the present invention.

Referring to Figures 17, 18 and 19 of the drawings, two yarns 2| are passed to the yarn package I1I which is rotated by means of surface drive roller I13. A yarn traversing means is interposed between the feed roll 23 and the yarn package I'II. The traversing means comprises two spaced yarn guiding elements I5I and I53 which are fastened to a reciprocating traverse bar I69.

A yarn separating pin I59 is mounted slightly v above the yarn guide elements I5I and I53 to contact only one of the two yarns H. The yarn separating pin is brought into and out of contact with the one yarn 2| to periodically separate the two yarns across the space between the guiding elements I5I and I53. The pin I59 is moved into andout of contact with the one yarn 2| by mounting the same on a bell crank lever I51, one end of which is pivoted to a projecting support I55 and the other end of which is mounted to travel along a cam surface I61. A cam surface following member I55 is mounted on the end of the bell crank lever I51. The yarn separating pin I59 is mounted in the elbow portion of the bell crank lever. The bell crank lever is so pivoted to the support I55 that upon raising of the lever by means of follower pin I65, the separating pin I59 will be moved perpendicularly above the slot defined by yarn separating elements I51 and I53 thus forcing one of the two yarns 2| into contact with the yarn guiding element opposite to the one which it would normally contact. This is clearly shown by dotted lines in Figure 19. The cam following pin I65 is maintained in contact with the cam surface by means of coil spring I53. A bell crank lever is pivoted to the support I55 at IGI.

It will be noted that the yarn separating pin I59 functions to separate the twoyarns 2| in only one direction of traverse of the traverse bar. In the apparatus shown, the yarns are separated only when the traverse bar moves the yarn guiding and separating elements in the lefthand direction as viewed in the drawings. In this form of apparatus, the yarn guiding elements may be reciprocated in a linear movement as shown,

Referring to Figure of the drawings, reference characters a and b designate the convolutions of the two yarns which are simultaneously wound on to a yarn package 39 by the method generally illustrated in Figures 1 and 2 of the drawings. The yarns a and b as shown in the drawings, represent the last wound layer of yarn and clearly show how the two yarns will be spaced from each other on all portions of the yarn package except that portion adjacent the ends of the yarn package where they are substantially contiguous with each other.

traversing mechanism for The method and apparatus of the present invention is suitable for use in the winding of a plurality of yarns on to a single yarn support.

the winding apparatus from any desired source, for example, yarn spinning apparatus, separate yarn packages or the like. The yarns, of course, may be composed of natural fibers, nylon, viscose; cellulose derivatives, or any other fiberor filament-forming materials. While the invention is obviously of particular utility in the winding of a plurality of yarns with untwisted filament bundles, it will .be understood that it can be used with equal facility in the winding of or less twist.

A number of modifications of a winding .and use in accordance with the present invention have been illustrated. 0bviously, many further modified forms of traversing mechanism can be used within the nature and spirit of the invention. It is only necessary that the mechanism operate to wind the yarns in separated relationship along the central portion of the yarn package'and in substantial contiguity with each other adjacent the ends of the yarn package. It is not necessary, of course, that the yarns be laid in close contact with each other at the ends of the package. It is sufiicient if the yarns are close enough to each other at theends of the yarn package so as to wind a yarn package with desirably firm shoulders,

In constructing the apparatus illustrated above, it is desired'that the separating pin as Well as the spaced yarn guiding elements be smooth and of suificiently hard material to prevent abrasion and give long wearing characteristics to the apparatus. The dimensions'of the yarn separating pin and the space between the yarn guiding elements are not critical except that the space between the guiding elements and the distance of yarns containing more the yarn separating pin above the guiding ele-.

ments must be such that upon traverse of the yarn guide; the yarns will be brought into materially closer contact with each other adjacent to the ends of the yarn package than at the central portion of the yarn package. For example, the yarn separating pin may be of the order of /2 inch in length and ie inch in diameter. Preferably, the diameter of th yarn separating pin is less than four times the width of the slot defined by the spaced yarn guiding elements. The yarn separating pin may be positioned between inch and 1 inch above the yarn guiding elements.

The yarn separating pin may be attached directly to the yarn guidingelements; however, the invention is not so limited. It is only necessary that the yarn separating pin move along with the yarn guiding elements to effectively maintain the separation of the yarns-as they are wound on the central portion of the package. As shown in Figures 17, '18 and 19, the yarn separating pin may be movable relative to the yarn guiding elements to be placed into and out of contact with one of the yarns so as to the yarns being. wound.

In many of the modifications illustrated and described, the plurality of yarns are gradually moved from their separated positions adjacent the central portion of the package to their position in substantial contiguity to each other at the ends of the package. Such a gradual, or progressive, movement of the yarns towards each other is not essential in accordance with the present invention. The yarns may be maintained separated from each other to an equal extent effect a separation of throughout the major portion of the traverse stroke but brought into contact with each other rapidly adjacent the-ends of strokes in the manner shown in Figures 17, 18 and 19.

It is, however, essential in accordance with the present invention that the plurality oi yarns be maintained in the same relative position to each other in both directions of traverse, i. e., a given yarn will always be in the lead when the yarns are traversed in the righthand direction and another given yarn will always be in the lead when the yarns are traversed in the lefthand direction. This will prevent crossing of the yarns adjacent the package ends. Such crossing of the yarns ad- I jacent the package ends is objectionable when the yarns are to be unwound from the package by drawing the same from one end thereof.

In accordance with the present invention, it is possible to wind a plurality of yarns consisting of one ormore filaments in side-by-side relationship on to a yarn support to form a highly desirable package having firm shoulders, and from which the yarns may be readily unwound without objectionable degradation of the yarns or filaments.

The apparatus of the present invention is com paratively simple and may be operated for lon periods of time with high machine efliciency. The yarn package produced in accordance with the present invention may be unwound in any desired manner without degradation of the yarn filaments; The yarn may be wound from the side of the package with the package rotated by.

means of a surface, center, or rim drive means such as is well known in the art, or the yarn may be merely pulled from the side of the package with the package free to rotate on a spindle by the pull of the yarn. drawn from one end of the package with the package maintained substantially stationary.

Since it is obvious that many changes and modificationscan be made in the above-described details without departing from the nature and spirit of the invention, it is to be understood that the invention is not to be limited to the details described herein except as set forth in the said yarns to each other being the same in both directions of traverse.

2. The method of simultaneously winding a plurality of yarns on to a yarn support which comprises traversing said yarns back and forth.

while winding the same onto said yarn support, maintaining said yarns spaced a given distance from each other on the central portion of said support and more closely spaced from each other adjacent to the ends of said support, the relative position of saidyarns to each other being the same in both directions of traverse.

3. The method of simultaneously winding a plurality of yarns on to a yarn support which comprises traversing said yarns back and forth while Winding the same on to said yarn support, maintaining said yarns spaced a given distance from each other on' the central portion ofsaid support and progressively more closely spaced irom each other adjacent to the ends of said support, the relative position of said yarns to eachother being the sam'ein both directions of traverse.

4. A wound yarn package containing a plurality oi yarns wound in side by-side relationship on a yarn support, said plurality of yarns being spaced from each other on. the central portion of said package and substantially contiguous with each other at the ends of said package, the relative position of said yarns toeach other being the same throughout the package.

5. A would yarn package containing a pinrality oi yarns wound in sirle-by-side relationship on a yarn support, said plurality or yarns being spaced a given distance from each other on the central portion of said package and more closely spaced from each other at the ends of said package, the relative position of said yarns to each other being the same throughout the package.

6. A yarn winding apparatus for simultaneous- 1y winding a plurality oi yarns on to a rotating yarn support, a yarn traversing mechanism,

' spaced yarn guiding elements on said traversing Furthermore, the yarns may be.

mechanism for guiding said plurality of yarns on to said yarn support, yarn separating means cooperatively positioned, relative to said guiding elements, to separate said yarns from each other across the space between said spaced guiding elements when the latter are positioned adjacent to the central portion of said support and to place said yarns substantially in contact with each other when said elements are adjacent to the ends of said support.

7. A yarn winding apparatus for simultaneously winding a plurality of yarns on to a rotating yarn support, a yarn traversing mechanism, spaced yarn guiding elements on said traversing mechanism for guiding said plurality of yarns on to said yam support, yarn separating means, movable, relative to said guiding elements, to separate said yarns from each other across the space betweensaid spaced guiding elements when the latter are positioned adjacent to the central portion of said support and to place said yarns substantially in contact with each other when said elements are adjacent to the ends of said support.

8. A yam winding apparatus for simultaneously winding a plurality of yarns on to a rotating yarn support, a yarn traversing mechanism,

spaced yarn guiding elements on said traversing mechanism for guiding said plurality of yarns on to said yarn support, cam controlled yarn separating means movable, relative to said guiding elements, to separate said yarns from each other across the space between said spaced guiding elements when the latter are positioned adjacent to the central portion of said support, and to place said yarns substantially in contact with each other when said elements are adjacent to the ends of said support. s

9. A yarn winding apparatus for simultaneously winding a plurality of yarns on to a rotating yarn support, a yarn traversing mechanism, spaced yarn guiding elements on said traversing mechanism for guiding said plurality of yarns on to said yarn support, yarnseparating means fixed relative to said guiding elements and cooperating with the latter to separate said yarns from each other across the space between said,

spaced guiding elements when the latter are positioned adjacent to the central portion of said support, and to place said yarns substantially in contact with each other when said elements are adjacent to the ends of said support.

10. A yarn winding apparatus for simultaneously winding a plurality of yarns on to a rotating yarn support, a yarn traversing mechanism, spaced yam guiding elements on said traversing mechanism for guiding said plurality of yarns on to said yarn support, said yarn traversing mechanism adapted to oscillate said spaced yarn guiding elements substantially longitudinally of the axis of said yarn support, a yarn separating means fixed relative to said guiding elements and in i0 alignment with the space between said guiding elements, atleast one of said yarns passing on one side of said separating means and at least another of said yarns passing on the other side of said separating means, said separating means positioned a sufllcient distance above said yarn guiding elements to cause said yarns to be laid down, adjacent the ends of the package, in substantial contiguity with each other as a result of the oscillation of said elements.

HOOD WORTHINGTON.