US2550086A - Cross winding yarns on their supporting reels - Google Patents

Description

April 24, 1951 M ROUGE CROSS WINDING YARNS ON THEIR SUPPORTING REELS 2 Sheets-Sheet 1 Filed March 19, 1946 /Hllllllllllil l N E N TOR. Marcel RO ATTORNEY April 24, 1951 Filed March 19, 1946 M. ROUGE 2,550,086

cRoss WINDING YARNs 0N THEIR SUPPORTING REELS 2 Sheets-Sheet 2 INVENTOR.

Marcel H0 Leg@ BY jim/ow TTORNEY Patented Apr. 24, 1951 CROSS WINDING YARNS ON THEIR SUPPORTING REELS Marcel Rouge, St. Rambert-Pile Barbe, France, assignor to Societe Rhodiaceta, Paris, France, a corporation of France Application March 19, 1946, Serial No. 655,396 In France March 18, 1941 Section 1, Public Law 690, August 8, 1946 Patent expires March 18, 1961 4 Claims.

This invention relates to improvements in means for cross winding yarns on their supporting reels, the principal object of the invention being to eliminate the use of a reciprocating yarn guide and at the same time to produce windings of even contour and entirely free from the so-called dropped yarns heretofore present in such windings.

Other objects and advantages of the invention will appear as the description proceeds.

One of the well-known methods used for obtaining windings of threads, yarns, etc. is that in which the distribution of the thread or yarn over the spool being formed is obtained vby means of a so-called split drum, that is to say a drum which is provided in its periphery With a slot or groove traced along two portions of a helix of opposite pitch, which cross at two or more points located in one and the same diametrical plane.

The thread or yarn which passes through the slot or engages in the groove before being Wound over the support is thus alternately guided in one direction and the other, from one to the other of the extreme points of intersection, so that it is distributed over the support without requiring the intervention of any mechanical member to which a reciprocating motion is imparted.

This absence of reciprocating members makes it possible to effect the winding at the highest speed which the thread or yarn can withstand Without damage; in general, this speed is much greater than that which the mechanisms with reciprocating motion themselves can withstand. However, this method of guiding the thread or 'yarn has the disadvantage that it produces Windings the edges of which are not of very regular contour or pattern and oten have the defects known under the name of dropped threads or crossed threads.

These defects, which are especially accentuated in case the yarn is ne or sliding (as, for example, silk, rayon, etc. yarns, consisting of laments of great length), are due to the fact that the yarn is not guided at the time it is deposited onto the two ends of the winding. As a matter of fact, When this yarn moves from one end of the Winding to the other, it rests against one of the lips of the slot or groove, while when it is brought back in the opposite direction, it is guided by the opposite lip of this slot or groove. It must therefore cross the width of the slot at the moment it is deposited on each one of the two ends of the winding, while forming a turning point; it is obvious that it is entirely unguided from the 2 moment it leaves one of the lips to the moment it enters into contact with the other lip.

An attempt was made to reduce the space which the yarn must thus travel without being guided, by reducing the width of the slot or groove or by Vmodifying its layout; an attempt was likewise made to give a resting point to the yarn by placing in its path, between the point where it leaves the drum and the point where it winds over the support, a plate on the rectilinear edge of which the yarn is pressed by the tension of the winding; but, none of these methods made it possible entirely to eliminate the defects pointed out above and in particular, it has not yet been possible to utilize the above-described method of guiding in order to obtain cylindrical or conical windings with ne or slippery yarns, such as rayon yarns. l The present invention relates to a method of and means for Winding yarn whereby it is possible, starting with a yarn of any nature whatsoever and without utilizing a reciprocatory yarn guide, to obtain windings the edges of which are noticeably even, which do not show any dropped yarns and which do not cause any diiculty during the subsequent utilization of the yarn. This method is characterized by the fact that by pressing the yarn along a suitable line, there is prevented any sliding of the parts of the yarn which are laid at the ends of the winding at the time when, as a result of the change of lip, the yarn is no longer guided.

In the accompanying drawings, which are merely illustrative and are not intended to be limitative,

Fig. 1 is a sectional View taken through the peripheral slot of a Winding drum adapted for carrying out the present invention;

Fig. 2 is a longitudinal sectional view of the drum, taken approximately on the line 2 2 of Fig. 1, the spool being shown in dotted lines;

Fig. 3 is a plan view of said drum;

Fig. fl is a plan view of one form of tension guide which may be used in association with the drum shown in Figs. l to '3 inclusive;

Fig. 5 is a plan view of a modified form 0I" tension guide; and

Fig. 6 is a diagrammatic view of the upper portion of the winding drum in association with the spool and illustrating the action of the tension guide shown in Fig. 4.

Referring to the drawings the yarn i3 to be wound, coming from a feeding spool of any shape whatsoever (not shown), passes through a tensioning system, then over a guide I, traverses the drum 2, passing into the slot 3, which it 3 enters at d, to leave same at 5, and winds on the receiving spool 6, which isv driven by peripheral Contact with the drum 2, against which it is held by a supporting ,arm l which oscillates about a shaft S.

Between the exit 5 of the drum and the point 9 (Fig. 5) Where the yarn Winds onto the spool 5, it intersects a guide ID in the :form of va plate, which is disposed between the drum, as near as possible to both.

As a result of the tension which it is necesu sary to impart to the yarn, so that the winding may hold, the yarn is constantly pressed against the edge l l (Fig. 4) of the 'pl-ate :L8 which ittraverses from one end to the other, rst .in .one d.-

rection, and then in the other, as a result of the Y rotation of the drum 2 in the direction lof the arrow F (Fig. 1). As a matter of fact, as a result of the angle formed by the yarn when passing over the plate I9, .the tensions T (Fig. 6) whichare exerted onbothsides of .the yarn'member in contact with the edge `l l of .the plate 1.0, onm a resultant P which maintains said yarn member pressed against the edge l .l.

At :each end, :the .plate '1:0 is provided with a .0

'.hevelor -.cham-fer l2 (Fig. .4) on which the yarn engages when the drum :2 is in the position shown` in Fig. 4 vor in the .symmetrical position. At that time, .the yarn traverses the `drum obliquely so .that 'the .direction .of the force P forms a. cer..- ,tain .angle with the edge Il lof the plate. If there were no bevel .or chamer, this incline .of :the force P would facilitate the sliding of the yarn but, if the incline .of the bevel or chamfer is suitably selected, the yarn, after it has arrived at the end .of .the winding, will not be able to slide .and will thus iberheld in this position luntil the .other lip `of :the groove .or slot seizes it, to bring it .back to the other end of the winding.

ESimilar results be obtained by replacing the plate i6 by a roller i4 (Fig. 5) the central :portion of which is cylindrical and the opposite ends conical; these conical ends .act in the same manner as the bevels or :cham-fers I 2 of the plate :Hl in Fig. `4.

It is .clearly understood that the driving of the spool is not necessarily accomplished by contact with the yarn-guiding drum and that this driving may be effected by a roller similar to the roller sho-,Wn in Fig.' 5, which makes it possible -easily to effect a jumbling up of the designs. I

VWhen a Split drum is used, it has been found possible also to avoid slipping and to obtain coils in perfect form by supplementing the tension guide above described with two guides xed inside the (drum as closely as possible to its linterior surface and placed in such a manner that the portions thereof which yare visible through the `slot are a few millimeters from the poi-nts at which said slot suddenly changes its direction and back of those pointsrwit'h respect to the :iirention of rotation of the drum.

jigs-1'2 and 3 illustrate a simple form of such guides, it being understood that this form and the meines @f fastening such guides inside the spool and the drum may be varied from that shown herein and scope of and the interior guides are represented by rods i4 and i5, each xed in one of the radial arms constituting the ends of the drum. That is to say, the rod Ill is fixed .one lof the radial arms I8 of the drum part I-i while the rod I5 is secured in one of the radial arms I9 of the drum lpart il, the latter arm not being visible in Fig. las it is located in front of the section line. The

arms, i3, i9 and the position of the rods thereon have been chosen so that, as hereinbefore stated, the `parts of the rods that are visible through the slot are disposed a few millimeters from the point at which the slot abruptly changes direction .and :behind this point with relation to the direction of rotation of the drum. The shaft on which 4,the is mounted is designated 26 and is provided-with a bearing sleeve 2 l.

Having thus described my invention, what I claim is:

1. A device for producing cross windings of yarn, vcomprising a .rotatable drum, .la rotatable bobbin .disposed adjacent to :said drum for re.- :ceiving yarn therefrom, means carried :by said drum for .directing the yarn in spiral layers al :ternately .directed toward opposite ends -of kthe bobbin, and V.pressure-exerting means, disposed between the ydrum and bobb'in and in contact with the yarn along a predetermined line between the point vwhere said yarn leaves the drum and the point where it engages the bobbin, said pressure-exerting means having a rectilinear yarncontact surface tapered yat opposite end portions thereof thereby to engage -t-he yarn at difieren ang-les at opposite ends of the bobbin.

2. A device for producing cross windings 1of yarn as set forth in claim 1, said pressure-exerting means vcomprising a plate having a rectilinear edge tapered toward the opposite ends thereof, the tapered portions being in position to contact with the yarn at opposite ends of the bobbi-n.

3. A device for producing cross windings of yarn as setforth Vin claim l, said 4pressure-exerting means comprising a cylindrical roller having frusto-conical portions at its opposite ends.

4. A device for producing Cross windings of Ayarn as set forth in claim 1, said pressure-exert'- ing means comprising -a cylindrical roller having fruStO-concal portions at its opposite ends,

.said roller being in Contact with the bobbin and serving as the driving means therefor.

' MARCEL ROUGE.

AREFBEREBZCESS CITED `The following references are of record in the file of this'patent:

UNITED STATES PATENTS Number Name Date 1,161,284 Belz Nov. 23, 1.915 '1,994,403 Reiners 'et al. Mar., 12, 1935 2,156,472 Dersen May 2, 1939 2,244,290 Dilch'ert June 3, 1941 2,249,147 Kuppers July V15, 1941 2,365,434 Rei-ners et al. Dec. 19, 1944 FOREIGN PATENTS Number Country Date 874,078 France Apr. 20, 13942

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