US2092811A

US2092811A - Treatment of yarns

Info

Publication number: US2092811A
Application number: US712110A
Authority: US
Inventors: Moncrieff Robert Wighton; Harrison George Wilson
Original assignee: Celanese Corp
Current assignee: Celanese Corp
Priority date: 1933-03-10
Filing date: 1934-02-20
Publication date: 1937-09-14
Anticipated expiration: 1954-09-14

Description

p 14,-1937- R. w. MONCRIEFF ET AL 2,092,811

TREATMENT OF YARNS Filed Feb. 20, 1934 nllll OBERT w MONCREFF GEURGE W- HARRISON Arrnnuzys rality of packages, whosenumber .however, is

Patented Sept.- 14, 1937 UNITED STATES TREATMENT OF YARNS Robert Wighton Moncrieif and George Wilson Harrison, Spondon, near Derby, England, assignors to Celanese Corporation of America,

a corporation of Delaware Application February 20, 1934, SerialNo.'712,1 In Great Britain March 10, 1933 1 Claim.

This invention relates to the treatment of yarns, and particularly to operations involving the simultaneous treatment of a plurality of yarns, e. g. in the form of a warp or sheet.

Where a plurality of yarns have been disposed in warp form chiefly for convenience in handling and for uniformity of treatment of such yarns, it is generally desirable, after such treatment, to collect the yarns on a plurality of bobbins. The yarns may then be submitted to further treatments in which the warp formation would be less convenient, and may be employed as individual yarns in further textile operations. According to the present invention several yarns, which have been treated simultaneously, are assembled as a narrow ribbon, which is wound on a single package, and is subsequently un-' wound, and divided during unwinding into a number of ends, such ends being rewound separately on a corresponding number of packages. The yarns of the group having been wound together as a ribbon which'is traversed on to a single package, they may be submitted to further treatment on the package as though they were a single yarn. By reason of their ribbon form however, they may be separated subsequently and again dealt with as individual yarns, being, for example, separately twisted, ordoubled together in any desired combination with one another.

Where a verylarge number of yarns have been treated in the 'form of a'warp or sheet, they may be collected in this manner on a plufar less than would be necessary if each yam were. to be wound on a separate bobbin, and the apparatus required is correspondingly smaller and less costly. At thesame time the multiple "end packages ,ofier considerable advantage in enabling any desired number up to the total number of ends on each package to be taken together and separated from the whole package as a single thread.

The importance of winding the several yarns side by side on the take-up bobbin and the dimculty arising from overlapping of one end over another is avoided. Consequently, on unwinding the ends separate readily from each other and re-winding can proceed with little danger of interruption.

Care should be taken in traversing the ribbon on to the take-up package to avoid any'te'ndency to undue piling of the yarn at the ends of the traverse, sincein this way some overlapping of the-several ends inthe ribbon might arise.

The invention is of particular advantage in the collection of yarns after. they have been stretched in warp form e. g.'as described in re- 2 spect of yarns of cellulose acetate or other cellulose derivative in U; S. application S. No.-602,844 filed 2nd April, 1932; In such a case, the yarns may enter the stretching operation having a certain denier, say 150-200 denier, and may be stretched, say to five or six times their original length, the stretched yarns being collected as groups on separate bobbins, each group, or multiple yarn, being of any desired denier, e. g. of a denier approximately to the 1505-200 of the orig! inal yarns. Since, moreover, the twist in the initial yarn has been largely lost on account of .the extension imparted to the yarn, it is almost always necessary to re-twist the stretched yarn, so that the collection of the yarn as multiple-end packages instead of as packages containing singleiends of the yarn can be made to yield as many' yarns of differentfinal denier as could be obtained by combining yarns from single-end packages without, however, involving any further intermediate operation, and, of course, bringing in the advantages as regards winding and reduction of machine size mentioned above. Where two or more ends are taken together from the multiple-end on the package, they may be. doubled together, as explained below, this operation conveniently taking place continuously with unwinding. a

In order to bring the ends into ribbon form the traverse guideis conveniently made in the form of a comb, through the teeth of which the endsare threaded. It is advisable not to have the teeth of the comb too closely spaced, and it is preferred to have a fairly wide spacing, say inch, and to incline the comb in order to bring the ends as close together as is desired in the ribbon. Thus for example the ribbon may be conveniently or inch 'wide in a ribbon con-- taining 5 or 6 ends for simultaneous winding.

By way of example the invention will now be described in greater detail with reference to the accompanying drawing in which:--

Figures 1, 2 and 3 are a front elevation, a side elevation and a plan view respectively of winding mechanism suitable for carrying out the invention, and

Figures 4 and 5 are illustrations of two methods of unwinding a package which has been wound in the manner according to the invention.

With reference to Figures 1-3, six separate threads 6 are led from a stretching apparatus or other suitable source of supply to a bobbin 1 The threads may be unwound fromgthe package and twisted separately or doubled together in any desired manner. Thus, in Figure 4 a package 2l is shown on which are wound four threads 22 in the form of a ribbon 23. The ribbon 23 is drawn from the package and the four threads 22 of which it consists, are separated bypassing them through a guide comb 24 having five teeth 25. The threads 22 are then led separately to four thread guides 26, round feed rollers 21, and thenceto the balloon guides 28 of four separate ring spinning devices 29 which are driven in pairs which is rotated by means of a driving drum 8" by means of belts 38. By these means the four (Figure 2) contacting with the yarn on the surface ofthe package so as to give constant speed yarn take-up. The form of apparatus described in U. S. application S. No. 705,864 filed 9th January, 1934, may be adopted in the driving of the drum 8, so as to enable the yarns to be wound 20 under controlled tension, and to allow any slack '25 on a reciprocating traverse bar occurring in starting to be readily taken up.

. On their way to the package I, the threads 6 pass between the teeth 9 of a comb or reed, indicated generally at H], the comb I being mounted ll traverses the threads on to the package I. The comb ID in this instance comprises seven teeth 9 which are held between two rods of stainless metal I 2, the upper ends of the teeth being 30 covered by a bent sheet' metal cover l3. The

rods 12 provide a smooth surface in contact with which the threads 6 may pass without damage. The teeth 9 may themselves be of similar material. v

The comb or reed I8 collects the threads 6 together in the form of a fiat ribbon .14, the comb l0 being setat an angle to the ribbon I 4 so that while the teeth 9 are not spaced unduly closely together, the ribbon I4 is a narrow one.

The comb l8 is-carried upon a rod l held in a bracket l6 by means of a butterfly nut I! which may be slackened to permit the angle of the comb to the ribbon M to be adjusted. The bracket which threads are separately twisted and wound on the packages 3|.

In Figure 5 a package 32 is shown on which a ribbon 33 consisting of six threads is wound. The threads may, for example, be of 25-30 denier each, having been produced by stretching yarns initially of 125-150 denier to five times their length. The threads are passed through a separating comb 34 and then conducted as two assemblies 35 of three threads each through guides 36, round feed'rollers 31 and thence to the balloon guides 38 of two ring spinning devices 39. The feed rollers 31 rotate all at the same speed, so thatthe ribbon 33 is uniformly drawn from the bobbin 32. By means of the device 31 the three threads of each assembly 35 are doubled together into a single thread and collected on the packages 40. Similarly, the ribbon 33 might have been split into three assemblies of two threads each, or into two assemblies, one of four threads and one of two, or with any other desired combination.

What we claim and desire Patent is:

An apparatus for the winding of a group of yarns concomitantly with their simultaneous treatment on to a single package while they are to secure by Letters in the form of a ribbon, said apparatus compris-' ing a package support, means for rotating said support about its axis, a comb for guiding the yarns in the form of a narrow ribbon to said package support, said comb being disposed at an angle to theaxis of the package support so as to produce a ribbon which is narrower than the width of the comb, and means for traversing said comb in a direction parallel to the axis of the package a support,

ROBERT WIGH'ION MONCRIEFF. GEORGE WILSON HARRISON.