US2822661A - Yarn winding - Google Patents

Description

Feb. 11, 195s w. FARRADY Er AL YARN WINDING 2. Sheets-Sheet 1 Filed Ju 1y s, 1953 .im r s TRM n NME. N EFL R V. O O mmc. n mw .A .L fm um WRY Feb; 11`,` 1958 W. FARRADY vEl' YARN WINDING 2 Sheets-Sheet 2 Filed July 5, 1955 FlG2.

K I mvENToRs. f WILLIAM- FARRADY United States Patent O YARN WINDING William Farrady, Eckhart, and Roy W. Coleman, Cumberiand, Md., assignors to Celanese Corporation of America, New York, N. Y., a corporation of Delaware Application .uly 3, 1953, Serial No. 365,813

13 Claims. (Cl. 57-34) This invention relates to the winding of yarn and relates more particularly to a ring spinning device for winding yarn on a bobbin.

in the making of synthetic yarn, such as cellulose acetate yarn, the yarn is generally fed continuously from the point of production to a collecting device, such as a ring spinner, where it is wound onto a bobbin or other yarn package support. When a bobbin is fully Wound it is dotted by the operator and replaced by an empty bobbin. The operator must then thread up the yarn collecting device again and start the winding process by throwing a loop of the yarn onto the empty rapidly rotating bobbin. In many cases the operator does not succeed in throwing on the yarn in the first attempt and must repeat the procedure so that time is lost and yarn is wasted, the waste of yarn being due to the fact that the yarn being fed to the collecting device during the period of time before the throwing on step is successful cannot be Wound on the bobbin. Furthermore, when the yarn is thrown onto the bobbin manually there is often present a relatively long exposed loose length, or tail, of untwisted yarn on the bobbin at the beginning of the winding operation. Since this tail does not become covered until a large number of turns of yarns have been wound on the bobbin, it is frequently soiied by being whirled outwardly, due to the centrifugal force caused by the rotation of the bobbin, into contact with oily or dirty parts of thewinding machinery. The yarn touching the soiled tail on the bobbin may also become contaminated by contact therewith. When a bobbin carrying such soiled portions is used in the production of a textile fabric the soiled portions show up as non-uniform sections in the fabric, which is manifestly undesirable.

it is therefore an object of this invention to provide a novel apparatus for the Winding of yarn which apparatus is free from the aforementioned and' other diiculties and which is especially ecient in operation and economical in construction.

A further object of this invention is the provision of a novel apparatus and process for winding of yarn, by means of which apparatus and process the operation of throwing the yarn on the bobbin may beV effected` in such a manner that the bobbin, or other yarn package support, does not carry a long loose'tail, so that contamination of the yarn is greatly reduced.

Still another object of thisv invention is the provision of a yarn winding apparatus by'means of which a relatively unskilled operator may thread theyarnthrough the apparatus and throw said yarn efliciently onto the yarn package support.

@ne embodiment of this invention may be'const'ructed by modifying a` ring spinner of the usual type, in which there is a vertically moving ring rail, carrying a' ring and a traveler, a stationary spindle rail carrying a vertical rotatable spindle on which a flanged bobbin is adapted to be mounted,a balloon guide mounted above the bobbin at a point on the center line (extended) of said bobbin, and a feed roll for supplying yarn. to the balloon guide.

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The traveler, which is a guide for directing the yarn from the balloon guide onto the bobbin, is loosely mounted on the ring for movement in a circular path around said bobbin. The yarn is distributed in the desired manner along the length of the bobbin by virtue of the reciprocating action of the ring rail and traveler. According to the present invention, this conventional; ring spinner s modified by providing it with a throw-on device mounted below the lower ange of the bobbin, which throw- `on device is adapted to engage the yarn coming from the traveler only during the period of time when no yarn is being wound on the bobbin, i. e. `after a fully wound bobbin has been removed and before the yarn has been thrown onto an empty bobbin. The throw-on device is provided with a yarn guide which is adapted to be moved under the lower flange of the bobbin/to cause the yarn coming from the traveler to engage said lower flange and to begin to wind on the bobbin, and is also provided with movable meansl operatively connected to `said yarn guide for lsevering the yarn when said guide is so moved.

A preferred embodiment of this invention is shown in the accompanying drawing, wherein: 4

Fig.' 1 is a perspective view of a ring spinning device modified according to the present invention, showing the path of the yarn before the yarn is thrown onto the bobbin,

Figs. 2 and 3 are side views on an enlarged scale as compared with Fig. 1, taken at different angles, ofthe throw-on device of this invention, and l Fig. 4 is a plan view of the throw-on device on. an enlarged'scale' as compared with Fig. 1, showing theltwo extreme positions of the moving parts of said device.

Referring now to the drawings, andv more particularly to Fig. 1, reference numeral 11 designates a ring spinner for winding yarn onto a bobbin 12', which bobbinhas a barrel 13 and a lower Vflange 14. There are a plurality of slots 15 in the edge of the lower ange l14 of the bobbin 12, while the underside of said bobbin is flat, i. e. free' from projections. The bobbin 12 is fremovably mounted on' a' rotatable spindle 164 of conven-r tional construction, which spindle is adapted to be driven at high speed by the conventional belt (not shown). Encircling the bobbinV 12 is a spinning ring 17V setin' a ring holder 18, which holder is in turn mounted von a ring rail 19 adapted to be reciprocated verticallyiby any suitablemechanism (not shown). The ring 1'7 carries a traveler 21 adapted to receive ayarn 22 which is continuously supplied. from any suitable source to the ring spinner 11. Yarn 22 travels in the direction shown by the arrowsin Fig. l from its source, which may be a spinning cabinet (not shown), and passes under ath'read outlet bar 23, over a driven lubricating rolll 24 where a suitable lubricant is applied to said yarn, around a driven feed roll 26, through a back guide 27 mounted, on'l a bar 28, through a balloon guide 29`mounted on another bar 31, and then to the traveler 21'. During the winding operation, the yarn passes from the traveler-,21 directly to the rotating bobbin 12 andV is distributed along the length of the barrel 13 of saidbobbin bythe up-and-down motion of the ring rail 19 and the traveler`21'. However, during the period of time when no yarn is being wound on the bobbin, that is, after a fully wound bobbin has been replaced by an empty bobbin` and before the yarn. has been thrown onto the latter, the yarn is l'ed from the traveler 21 through the interior of the ring 117 and down past the lower flange 14 of the bobbin 12, through a -hook guidev 32, around a rodv guide 33, then upward through the interior of the ring 17 and overa stationary upper guide 34 mounted on'the bar 31', Tand thence to feed roll 26 where it isaccumulated aswaste:

The hook guide 32 and the rod guide 33 constitute elements of a throw-on device 36 comprising a threaded post 37, which post may be supported on any suitable portion of the apparatus, for example on a spindle rail 38. A bent lever 39 is journalled Von said post 37 with i. e lfrom position A, shown in solid lines in Fig. 4, to position B shown ink broken lines. The lever 39 is biased,

in adirection opposite to the direction of the arrow in Fig. 4,.by the action of a coil spring 47, operating in -"torsion, wound around the collar 42 and around the cen- ,ti'al portion 4170i said lever, said spring 47 having one l end looped around a hook 48 on said collar 42 and its l.other end looped around the arm 46. The movement of the lever 39 in response to the action of the spring 47 is limited by the engagement of -a pin 49 projecting 4upward from the central portion 41 of lever 39 (Figs. 2, 3 and 4) with the edge of a groove 51 cut in the collar 42, or, if desired, said movement may be limited by the engagement ofthe arm 44 with the outer edge of one or more washers 52 arranged around a post V53, which post is supported'in xed position, as by means of a set screw S4, on an extension of the collar 43. The lever 39 is so V mounted that when it is in position A the radial distance between the hook guide 32 and the axis 55 of the bobbin 12 is greater than the radius of the lower flange 14 of the bobbin.r However, when the lever 39 is moved to position B the hook guide 32 moves under the ange 14 so that the radial distance between said hook guide and the axis 55 of the bobbin is less than the radius of said flange.

rl`he Yguide member 33 comprises a cylindrical rod 56 Vhavingan enlarged head 57 and, adjacent to said head, .a circumferential groove 59 adapted to receive the yarn. The head 57 is provided with a cut-out portion 6) to `allow free movement of the yarn passing to the groove 59. The rod 56 is iixed to a block 61 (Fig. 4) mounted for rotation at the top of a support 62, which support is held in a xed position on the threaded post 37 in any suitable manner such as by means of a fitting 63 and a slet screw 64. The rod 56 carries slidably mounted thereon a -sleeve 66. The forward portion of this sleeve 66 is tapered at 67 to form a relatively sharp edge 68 which is adapted to engage the yarn adjacent to the groove S9 Ywhen said sleeve is moved forward along rod 56 into contact with the head 57. In order to connect the sleeve 66 to the manually movable varm 46 of the lever 39, there is provided a bell crank 69 journalled, between the washers 52 and a cap 71, on the cylindrical post 53. One leg 72 of the bell crank 69 is provided with a strap 73 encircling the sleeve 66, the strap 73 being attached to said sleeve in any suitable manner, for example by means of 'screws 74 passing vthrough slots 76 (Fig. 2) in said strap, which screws 74 are threaded into the sleeve 66. The bell crank 69 is biased in a direction opposite to that of the arrows shown in Fig. 4, i. e. towards its position C, shown in solid lines,-by a spring 77 operating under tension. One end of the spring 77 engages the hook 48 of the stationary collar 42 on post 37 while the other end of said spring passes through a hole in a leg 78 of the bell crank 69. Thus, due to the action of the spring 77 the leg 78 is urged into Contact with the manually operable arm 46 of lever 39 and the sleeve 66 is urged to a position away from the head 57. Manual movement of Iarm 46 to its position B causes the sleeve 66 to move into contact with the head S7 and at the same time causes a slight movement of the rod 56 about the support 62.

When it is desired to throw the yarn 22 onto the rotating bobbin 12, the arm 46 is moved. manually to its position B, thereby moving the guide 32 towards the axis of the bobbin 12 and causing the yarn coming from the traveler 21 to said guide to engage the outer edge of the lower flange 14 of said bobbin. The yarn is caught in one of the slots 15 in said ange and begins to wind around the barrel 13 of the bobbin 12. At the same time, the manual movement of the arm 46 to its position B causes the sleeve 66 to move along the rod 56 until its forward edge 68 engages the yarn that is being drawn over the outer guide 33 by the action of the roll 26. Accordingly the yarn is held between the edge 68 and the head 57 and is broken, at the point of holding, by the pull of the roll 26. Thereafter the arm 46 is released and the parts return to their original positions due to the action of the springs 47 and 77.

After a full bobbin 12 has been removed from the ring spinner the yarn is threaded through the apparatus in the following manner: The yarn 22 is passed from the feed roll 26 to the back guide 27, to the balloon guide 29, to the upper guide 34, and back to the feed roll 26.

lThen the yarn passing from the balloon guide 29 to the upper guide 34 is drawn down manually through the interior of the ring 17 in the form of a loop, is engaged in the traveler 21 and then slipped over the guides 32 and 33 of the throw-on device 36. This operation may be carried out after an empty bobbin 12 has been placed in the ring yspinner 11. Although it is essential that the bobbin be rotating when the yarn is being thrown onto the bobbin by the manual movementof the arm 46, it is desirable to keep the bobbin stationary, by means of thc brake of the ring spinner 11, during the operation of threading the yarn through the apparatus, in order to decrease the possibility that the fingers of the operator might be pinched between the ring rail 19 and the flanges of the bobbin 12.

When the apparatus of the present invention is employed,` the operation of throwing the yarn onto the bob- -bin may be carried out in an eicient and accurate manner by a relatively unskilled operator, there is very little waste of yarn caused by unsuccessful attempts at throwing the yarn onto the bobbin, and the tail of yarn on the bobbin is quite short and does not tend to whip about into contact with dirty or lubricated portions of the apparatus.

For best results, the throwing-on operation should be carried out when the ring and traveler are at or near the lowest point in their reciprocating vertical motion. At this point the traveler is just above the lower ange of the bobbin and the length of yarn between the traveler and the rod guide is at a minimum so that the tail," i. e. the portion of the yarn between the first Wrap of yarnv around the bobbin and the broken end of the yarn. will be of minimum length. It is, of course, desirable to have the rod guide located as close as possible to the hook guide to insure that there is no long piece of yarn between said guides. The throwing-on operation may be made more nearly automatic by providing means, operatively connected to the ring rail, for actuating the lever when the ring rail is at or near its lowest position. For

example, ,the ring rail may be provided with a downwardly projecting cam surface for engaging and moving the lever.

While the apparatus of this invention has been described in'connection with the Winding of a single bobbin it is to be understood that in accordance with the usual practice in theV art a numberl of bobbins may be wound simultaneously at separate positions of the same winding machine with each ring rail carrying a number of rings and travelers and each spindle rail supporting a number of spindles and bobbins.

It is to be understood that the foregoing detailed description is given merely by way of illustration and that many variations may be made therein Without departing fQm the spirit of our invention.

Having described our invention, what wedesire t'o secure by Letters Patent is:

1. In a Idevice for winding yarn on a yarn package support, an axially movable yarn guide for directing yar-n around said support, a second movable guide for receiving yarn coming from said first mentioned guide, said second guide being spaced radially from said support and being movable relative to the axis of said support to cause the yarn coming from saidv first guide to begin to wind on said support, and movable means operatively connected tol said second guide :for severing the yarn when said second guide is moved toward' said axis.

2. ln a device for winding yarn on a yarn package support, an axially movable yarn guide yfor directing yarn around said support, a second movable yarn lguide for receiving yarn coming from said first mentioned guide, said second guide being spaced radially from said support, being spaced away from the ends of said support in the direction of the axis of said support, and being movable relative to the ax1s of said support to cause the yarn coming from said tir-st guide to begin to wind on said support, a third guide adjacent to said second guide for receiving yarn from said second guide, and movable means operatively connected to said second guide for severing the yarn on said thind guide when said second guide is moved toward said axis.

3. In a device for winding yarn on a yarn package support, an axially movable yarn guide for directing yarn around said support, a second movable guide for receiving yarn coming from said first mentioned guide, said second guide being spaced radially from said support and being movable relative to the axis of said support to cause the yarn coming from said first guide to begin to wind on said support, movable means operatively connected to said second guide for severing the yarn when said second guide is moved toward said axis, and :spring means for urging said second guide in a direction away from said axis and for urging said movable means away from said yarn.

4. In a ring spinning apparatus for winding yarn on a vertical bobbin, a traveler, a movable guide for receiving yarn coming from said traveler, said guide being below the bobbin and being movable relative to the axis of said bobbin to cause the yarn coming from the traveler to begin to wind on said bobbin, and movable means operatively connected to said guide for severing the yarn when said guide is moved toward said axis.

5. In a ring spinning apparatus for winding yarn on a vertical bobbin, a traveler, a movable guide for receiving yarn coming from said traveler, said guide being below the bobbin and being movable relative to the axis of said bobbin to cause the yarn coming from the traveler to begin to wind on said bobbin, another guide adjacent to said movable guide for receiving yarn from said movable guide, and movable means operatively connected to said movable guide for engaging and severing the yarn on said other guide when said movable guide is moved toward said axis.

6. Ina ring spinning apparatus for winding yarn on a vertical bobbin having an upper flange and a lower ange, a traveler, a movable guide for receiving yarn coming from said traveler, said guide being below the bobbin and being movable relative to the axis ot' said bobbin to cause the yarn coming from the trave-ler to engage the lower flange of said bobbin and to begin to wind on said bobbin, and movable means operatively connected to said guide for severing the yarn when said guide is moved V6 guide, movable means operatively connectedv to` said movable guide for engaging and severing the yarn on said other guide when said movable guide is moved t'oward said axis, and'spring means for urging said movable guide in a direction away from the axis' of said bobbin and for urging said movable means away from said yarn.

8. In a ring spinning apparatus for winding yarn on a vertical bobbin, a traveler, a movable guide for receiving yarn coming from said traveler, said guide being below the bobbin and being movable relative to the axis of said bobbin to cause the yarn coming ffrom the traveler to begin to wind on said bobbin, a rod having a groove, adjacent to said movable guide, for receiving yarn from said movable guide, and means slidably mounted on said rod and operatively connected to vsaid movable" guide for engaging and severing the yarn passing through said groove when said movable guide is moved toward said axis.

9. In a ring spinning apparatus for winding yarn on a vertical bobbin, atraveler, a movable guide for receiving yarn coming from said traveler, said guide being below the bobbin and being movable relative to the axis of said bobbin to cause the yarn coming from the traveler to begin to wind on said bobbin, a rod having a groove, adjacent to said movable guide, for receiving yarn from said movable guide, means slidably mounted on said rod and operatively connected to said movable giude for engaging and severing the yarn passing through said groove when said movable guide is moved toward said axis, and spring means for urging said movable Imeans in a direction away from the said yarn.

l0. In a ring spinning apparatus for winding yarn on a vertical bobbin having an upper ange and a lower llange, a traveler, a guide for receiving yarn coming from said traveler mounted below said bobbin, a pivoted lever carrying said guide at one end thereof, said guide being movable, on movement of said lever, relative to the axis of the bobbin to cause the yarn coming from the traveler to engage the lower ange of said bobbin and to begin to wind on said bobbin, a rod having a groove, adjacent to said guide, for receiving yarn from said guide, a sleeve slidably mounted on said rod and adapted on movement toward said groove to engage and sever the yarn passing through said groove, a bell crank connecting said sleeve and said lever so that said sleeve is moved toward said groove when the guide is moved in a `direction toward said axis, and spring means for urging said lever in a direction to move said guide away from said axis and for urging said sleeve in a direction away from said yarn.

1l. In a ring spinning apparatus for Winding yarn on a vertical bobbin having an upper ange and a lower lange, a traveler, a guide for receiving yarn coming from said traveler mounted below said bobbin, a pivoted lever carrying said guide at one end thereof, said guide being movable, on movement of said lever, relative to the axis of the bobbin to cause the yarn coming from the traveler to engage the lower ange of said bobbin and to begin to wind on said bobbin, a rod having an enlarged head adjacent to said guide and having a groove, adjacent said head, for receiving the yarn from said guide, a roll for drawing said yarn from said traveler through said guide and said groove, a sleeve slidably mounted on said rod and having a forward edge adapted, on movement of said sleeve toward said groove to engage and hold the yarn passing through said groove, a bell crank connecting said sleeve and said lever so that said sleeve is moved toward said groove when the said guide is moved in a direction toward said axis, and spring means for urging said lever in a direction to move said guide away from said axis and for urging said sleeve in a direction away from said yarn.

12. In a ring spinning apparatus for winding yarn on a bobbin, said apparatus comprising a yarn guide mounted at the axis of the bobbin, a driven feed roll for deliverjing yarn to said guide, and a traveler forreceiving yarn a bobbin, said apparatus comprising a yarn guide mounted at the axis of the bobbin, a driven feed roll for delivering yarn to said guide, and a traveler for receiving yarn from said guide, a lower guide mounted below said bobbin for receiving yarn from said traveler, an upper guide mounted adjacent to said feed roll for receiving yarn from said lower guide and for delivering the same to said feed roll, said lower guide being movable relative to the axis of said bobbin to cause the yarn coming from the traveler to begin to Wind onsaid bobbin, and movable means operatively connectedv to said lower guide for 'severing the' yarn when said lower guide is moved toward said axis.

References Cited in the 51e of this patent UNITED STATES PATENTS 880,014 Cumnock Feb. 25, 1908 2,261,239 Elvin et al. Nov. 4, 1941 2,582,696 Haythornthwaite Jan. 1S, 1952 2,661,589 Haythornthwaite Dec. 8, 1953 FOREIGN PATENTS 3,370 Great Britian 1875 293,371 Great Britain July 4, 1928

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