US2345538A - Yarn winding - Google Patents

Description

E. V. LEWIS YARN WINDING March z3, 1944.

Filed June 17, 1942 2 Sheets-Sheet l ATTORNEY March 28, 1944.

E. v. LEWIS YARN WINDING 2 sheets-sheet 2 Filed June 17, 1942 Everett Vernon lears :NvENToR L 'ATTORNEY Patented 28, A1944 YARN WINDING. Y

Everett Vernon Lewis, Wilmington, Del., assignor to E. I. du Pont de Nemours & Company, Wilmington, Del., a. corporation of Delaware Application Junek 17, 1942. Serial No. 447,462 Claims. (Cl. 242-42) This invention relates to yarn winding and, more particularly, it relates to an improved apparatus for winding and traversing two yarns on to a yarn support to form a satisfactory yarn package from which the yarns may be unwound without substantial degradation.

It has been known, heretofore, to wind a 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 defective, particularly if the yarns were made up of parallel bundles of untwlsted filaments. If the plurality of untwisted yarns is laid clown on the yarn package in a single bundle, it is diiiicult 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 o1' the yarn package, the extremities, or shoulders, of the package are excessively soft.

The present invention represents an improvement over the apparatus disclosed in the copending application of Hood Worthington, Serial No. 447,481, filed of even date herewith.

Itis an object of the present invention to produce 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 Aproduce a firm-shouldered yarn package comprising a plurality of yarns wound in side-by-side relationship and traversed from end to end of the package, said package being free from objectlonabile 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 with a minimum of yarn degradation.

The objects of this invention may be accomplished, in general, by providing traversing yarn guiding means in combination with yarn diverging means which are so positioned relative to each other that the yarns upon being traversed and wound on to a yarn support will be spaced from each other on the central portion of the yarn support and substantially contiguous with each other adjacent the ends of the support, the

relative position of the yarns to each other being the same in both directions of traverse.

Other dbjects 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 form of apparatus constructed in accordance with the invention.

Figure 2 is an end elevational view of the apparatus shown in Figure 1.

Figures 3 and 4 are enlarged detail views of the yarn guiding means and yarn diverging means respectively.

Figures 5 and 6 are front elevational views of modified forms of apparatus constructed in accordance with the invention.

Referring to Figures l to 4 of the drawings, reference numeral Il designates two yarns forwarded from any desired source, such as spinning machine, not shown, by means of yarn forwarding roller I3. One of the two yarns is passed about a fixed diverging pin I5 and the other about xed diverging pin II. The two pins are fixedly mounted on a stationary support I4. The two yarns are then |brought together through the opening defined by spaced yarn guiding elements I9 and 2| of the yarn guide 20. The yarn guide 20 is fixed on a reciprocating yarn traversing bar 23 arranged to traverse the yarn back and forth adjacent the yarn support 25. The yarn support 25 is rotated by means of surface drive roller 29 to form thereon the wound yarn package 2l. The fixed diverging pins I5 and Il function to maintain the yarns II separated from each other within the opening between spaced yarn guiding elements I9 and 2| when the yarn guide 20 is positioned adjacent the central portion of the yarn package. The pins I5 and I1 are positioned, relative to the package being wound and the yarn guide, to bring the yarns into substantial contiguity with eachother as they approach the end of the wound yarn package. In order to function in this manner, the pins I5 and I'I must be located between the yarn forwarding roller I3 and the yarn guide 20, and they must furthermore be positioned within parallel planes extending from the ends of the yarn package and perpendicularly to the axis of the yarn package. These two planes are generally designated by the lines A and B in Figure 1.

It is furthermore desirable that the pins l5 and I1 be positioned outside of lines C and D drawn side ofthe angularly disposed lines C and D is not essential to the 'operativeness of the device but is highly desirable to substantially' prevent an objectionable vibration of the yarns due to their being moved into and out of contact with the yarn diverting Pins. Diiiiculty is sometimes experienced in initiatingthe winding of the plurality of yarns on a rotating bobbin. 'I'he bo'bbin or bobbin support may withayarnadheringmens asshowninll'lgure 1. This adhering means may comprise a ilxed abrasive or an adhesivo positioned on the edge of the bobbin or bobbin support.

Referring to Figure 5 of the drawings, four yarns- Il are forwarded by means o f yarn forwarding roller i3 and each `of these yarns is passedabout one of the four yarn diverging pins 3|, 33, 33, and 31, yarn dlverg'ing pins 3l and 33 being positioned on the righthand side of the center line of the yarn package and pins 35 and 31 being positioned on the lefthand side of the center line of the yarn package In other respects, this modified form of the invention is identical to that shown in Figures 1 and 2 of the drawings.

By means of the apparatus shown in Figure 5,

. the four yarns Il will be alternately placed into therefore, be providedI astuce iibers. continuous iilaments or of a single iilaineht often referred to as a mono-fil.

While the invention is obviously of particular utility in the winding of a plurality of yarns withuntwisted filament bundles. it may be used with equal facility in the winding of yarns containing more or less twist. In constructing. the apparatus above described, it is desired that the yarn diverging pins and the yarn traversing and guidverging pins must be positioned within parallel contact witheach' other and in spaced relationship to each other on to the wound yarn package 21. It will be readily apparent that when the yarn guide 20 moves to the right all but the yarn Il passing about pin 3l will be in contact with the yarn guiding element, 2| as soon as yarn guide 2li passes the point which is perpendicularly below diverging pin 33. As the guide Il continues to the end of its traverse stroke in the righthand direction, as viewed in the drawings, all four yarns will be brought into contact with yarn guiding element 2|. When traversing Vin the opposite direction all but the yarn il passing about pin 31 will contact yarn guiding element I! when the guide 2li passes a point perpendicularly in line with pin I5. Here again, all four yarns will be in contact with yarn guiding element I9 when the guide 20 moves to its extreme lefthand position.

By this modifled form of the invention, all four yarns can be removed from the yarn package without noticeable degradation.

Figure 6 of the drawings illustrates a slightly modified form of apparatus in which the yarn diverging pins 4| and ll are not in parallel alignment with the axis of the yarn package. 'I'he device functions in the same manner as above described with reference to Figures 1 and 2 of the drawings. 'I'his figure of the drawings illustrates the manner in which the details of the specific structure illustrated may be readily changed within the spirit of the invention. The apparatus of the present invention is suitable for use in the winding of a plurality of yarns in substantial side-byside arrangement on to a single yarn support to form a single yarn package. 'I'he yarns may be passed to the winding apparatus from any desired source, for example,

yarn spinning apparatus, separate yarn packages or the like. The yarns may, `of course, be composed of any desired material, for example, they may be composed of natural iibers, nylon, viscose rayon. cellulose derivative rayon or any other yarns produced from ilbers or iilaments. The yarns may be composed of a bundle of spun planes drawn from the ends of the yarn package perpendicularly to the packageaxis. Preferably, the yarn diverging pins are positioned a'considerable distance above the yarn package to avoid sharp bends in the yarn. The pins may, for example, be positioned from 6 to 30 inches above the yarn package. The opening between the spaced yarn guiding elements is preferably not too wide; otherwise the yarn passing from one yarn guiding element to the other yarn guiding element asA the yarn guide traverses may cause a sudden angular variation of the winding char- 'acteristics An opening of from 1A@ to V4 inch between the spaced yarn guiding elements is preferred. Preferably, the yarn diverging pins i5 and I1 are positioned at least one inch below the yarn forwarding roller to permit ready stringing up of the apparatus with the yarns.

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

The apparatus of the present invention is exceedingly simple in structure and may be operated for long periods of time without objectionable maintenance problems. 'I'he yarn package produced in accordance with the apparatus of this invention may be unwound in any desired manner without yarn filament degradation. By means of the apparatus of this invention, the yarns are not caused to cross each other but are maintained in the same relative position to each other in both directions of traverse. The yarns may be unwound from the package either by pulling the same from the side of the package or by pulling both yarns from one end of the package.

Since it is obvious that many changes and modifications can 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 appended claims.

I claim:

1. A yarn winding apparatus for simultaneously winding a plurality of yarns on arotating yarn support, a yarn guide comprising two spaced `ously winding a plurality of yarns on a rotating yarn support, a yarn guide comprising two spaced yarn guiding elements, means for traversing said yarn guide back and forth adjacent said yarn support, means for simultaneously forwarding said plurality of yarns the space between said two yarn guiding elements, and yarn diverging pins positioned on opposite sides of the center line of the yarn package and between said yarn guide and said yarn forwarding means.

3. A yarn winding apparatus for simultaneously winding a plurality of yarns on a rotating yarn support, a yarn guide comprising two spaced yarn guiding elements, means for traversing said yarn guide back and forth adjacent said yarn support, means for simultaneously forwarding said plurality of yarns to the space between said two yarn guiding elements, and yarn diverging pins positioned on opposite sides of a plane drawn perpendicularly to the axis of the package at the center thereof and between said yarn guide and said yarn forwarding means, said pins positioned within parallel planes extending from the ends of the yarn package perpendicularly to the axis of the yarn package.

4. A yarn winding apparatus for simultaneously Winding a plurality of yarns on a rotating yarn support, a yarn guide comprising two spaced yarn guiding elements, means for traversing said yam guide back and forth adjacent said yarn support, means for simultaneously forwarding said plurality of yarns to the space between said two yarn guiding elements, and yarn diverging pins positioned on opposite sides of a plane drawn perpendicularly to the axis of the yarn package at the center thereof and between said yarn guide and said yarn forwarding means. said pins positioned in a plane winch is substantially parallel to the axis of the yarn package and within parallel planes extending from the ends of the yarn package perpendicularly to the axis of the yarn package.

5. A yam winding apparatus for simultaneously winding a plurality of yarns on a rotating yarn support, a yarn guide comprising two spaced yarn guiding elements, means for traversing said yarn guide back and forth adjacent said yarn support, means for simultaneously forwarding said plurality of yarns to the space between said two yarn guiding elements, and yarn diverging pins positioned on opposite sides of a plane drawn perpendicularly to the axis of the yarn package at the center thereof and between said yarn guide and said yarn forwarding means, said pins positioned within parallel planes extending from the end of the yarn package perpendicularly to the axis of the yarn package, and positioned outside of a triangle formed between the ends of the yarn package and the point at which the yarns leave the yarn forwarding means.

EVEREI'I VERNON LEWIS.

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