US2825118A - Apparatus for bulking yarn - Google Patents

Description

March 1958 D. e. SOUSSLOFF ETAL 2,825,118 A APPARATUS FOR BULKING YARN Filed Jan. 15, 1954 IN V EN TOR.

DIMITRI a. SOUSSLOFFV y EDWARD J. DUGGAN B THEODORE QWHITING ATTORNEY Unted States Patent APPARATUS FOR BULKING YARN Application January 13, 1954, Serial No. 403,818

3 Claims. (Cl. 28-1) The present invention relates to a machine for imparting bulk to a strand of twisted continuous filament yarn, and more particularly pertains to such a machine adapted to form loops in the individual filaments which make up the strand.

It has been discovered that if a twisted strand of continuous filament yarn is passed through an aspirator, and is drawn away from said aspirator at substantially 90 as soon as it emerges therefrom, many of the filaments making up the strandare thrown out from the strand in the form of loops which give bulk thereto and which simulate the appearance of spun yarn. Heretofore, this process of imparting bulk to continuous filament yarn has been diflicult to accomplish due to difiiculty in feeding the yarn to the aspirator at a constant predetermined speed, withdrawing the yarn from the aspirator at a speed that is a predetremined fraction of the speed with.

which it is fed thereinto to allow forthe shortening-of thestrand that takes place as its diameter is' increased,

and the necessity for stretching the bulked yarn a small amount to standardize its diameter and to remove any irregularities therein. Furthermore, prior to the present invention great difficulty has been experienced in starting the bulking operation inasmuch as the feeding, withdrawing and stretching steps must be started simultaneously and in synchronism.

One object of the present invention is to provide a machine for imparting bulk to a strand of twisted continuous yarn. stretching the bulked strand and winding it into a package in one continuous operation.

Another object of the present invention is to provide a machine for imparting bulk to a'twisted strand of continuous filament yarn wherein breakage of the strand being operated upon will cause all of the elements of the machine to stop their operation.

'Another object of the present invention is to provide a machine for imparting bulk to a twisted strand of continuous .filamentyarn wherein all of the elements thereof can be, started simultaneously.

Another object of the present invention is to provide an apparatus for imparting bulk to a twisted. strand of continuous filament yarn wherein all the elements thereof,

can be stopped substantially simultaneously.

Other objects of the present invention will in part be obvious and will in part appear hereinafter.

, The invention accordingly comprises the apparatus possessing the construction, combination of elements and arrangement of parts which are exemplified in the following detailed disclosure, and the scope of the application of which will be indicatedin the claims.

For a fuller understanding of the nature and objects of the invention, reference should be had to the following detailed description taken in connection with the ac-- companying drawing wherein: 1

Fig. l is a front elevation of a section of the machine of the present invention;

Fig. 2 is a side elevation corresponding to Fig. l; and

i Fig. 3 is a detail view of a rotating yarn guide. I

The machine of the present invention is preferably a multiple unit machine. 1 That is to say, it is provided with a plurality of identical yarn processing units along its length on both sides thereof. Inasmuch as all units are identical, only one will be described herein; and

Each unit of the present invention includes three yarn handling stations or positions. Each position includes a positively driven roller which in the first two stations drives a form of idler roll to forward the strand of yarn being operated on, and the third operates a winding spindle to stretch the bulked yarn and wind it in a package. An aspirator for forming loops in the filaments of the strand being operated on is positioned between the first and second rollers and receives the strand of yarn forwarded by the first roller and has the bulked yarn drawn therefrom by the second roller. The winding spindle driven by the third roll and the idler rolls driven by the first two rollers are interconnected in such a fashion that when a stop motion mechanism incorporated with the winding spindle is actuated to disengage the winding spindle from its driving roller, the two idler rolls cooperating with the first two rollers are also disengaged to prevent any further feeding of the yarn. The winding spindle and the vtwo idler rollers are further interconnected for simultaneous movement by a manually operated member whereby all three of them can be placed in contact with their respective driving roll at substantially the same instant to start the bulking operation.

A plurality of spaced apart vertical frame members It are secured to base members 12 and are held together to form a unitary structure by means of longitudinal mem bers 14, 16, 18, 20 and 114. Cross members 24 secured to vertical frame members 10 support a rail -or shelf 26 longitudinally of both sides of the machine adjacent base members 12. Shelf 26 is adapted to carry a plurality of yarn packages P that serve as the supply for strands of yarn Y. Three identical brackets 28, 30 and 32 are carried by vertical frame members 10 and are spacedsubstantially equal distances from each other. Shafts 34, 36 and 38 are rotatably carried by brackets 28, 30 and 32 respectively, and are positively driven by any convenient source of power, not shown. Preferably shaft: 34 rotates at a speed in the order of 35% faster than shaft 36 and in the order of 20% faster than shaft 38. Rollers 40, 42 and 44' are carried for rotation by shafts 34, 36 and 38 respectively.

A bobbin hanger 46 is secu'red'to longitudinal member 14 to permit winding arbor 48, or the package being wound thereon, to contact roll 44 and to be driven thereby to wind said package. Preferably bobbin hanger 46 includes a journal member 50 secured to longitudinal member 14 and having a shaft 52 rotatably journaled therein. An arm 54 is fixedly secured to one end of shaft 52 for pivotal movement therewith. Winding arbor 48 is rotatably mounted on the forward end of arm 54. A stop-motion mechanism. which may be of any convenient type, as for example such as isdisclosed in United States Patent No. 2,649,253, but which preferably is similar to the stop-motion mechanism disclosed in the application for United States Letters Patent Serial No. 320,065, filed November I2, 1952, by D. G. Soussloff and R. V. Tata, is incorporated in journal member 50. Preferably the stop-motion mechanism includes a depending hook 56 pivotally carried by a rearward extension of arm 54 and movable into and out of engagement with an oscillating finger 58 to pivot arbor 48 upwardly out of engagement with its driving roll 44 when said hook and finger are engaged. Oscillating A yarn :rngaging counter-' is adapted to be engaged by the running "strand "of yarn, in a manner well known in the art, whereby said lever is held against movement but-is urged by its counter-balance 61 to swing upwardly when the running strand of yarn breaks or is exhausted. Upward movementof breakage lever 60 swings depending hook 56 into engagement with oscillating finger 58 to cause arm 54 to be lifted upwardly. Longitudinal members l6 and 18 carry journal members 62 and 64 similar to journal member 50 but with the stop-motion mechanism omitted. Arms 66 and 68, similar to arm 54 are secured to shafts 74) and 72 journalled in said journal members 62 and64. Rolls 74 and 76, generally similar to arbor 48 .butprovided with a rubber yarn engaging, surface arejrotatably secured to the free ends of arms 66 and 68respectively for movement into engagement with rolls "4'2 and40,

The opposite ends of shafts 52, 70 and 72 have-levers 78 fixedly secured thereto so that downwardmovement thereof will lift said arms and upward movement thereof will permit said arms to descend. The free ends of 1evers78 are bifurcated and slidably receive atension rod 80. The uppermost end of rod 80 is connected to "one end of spring 82, the other end ofwhich is; secured to a longitudinal member 84,.and the lowermost endof' tension rod 80 is secured to one end of a flexiblezmember 8621s, for example a metallic cable or tape. -'Flexible member 86-passes around pulleys 88 and90 and hasits other end secured in any convenient manner Ito-afoot operated lever 92 which is pivotally carried 'bylongitudinal member 22. Abutments or stops 98 are rfixedly secured to tension rod 80 adjacent the-upper'surfaces of levers 78. It will be seen, therefore, that depressing lever 92 will pull rod 80 downwardly and will cause abutments 98 to engage levers 78 to simultaneously lift rolls 74 and 76 and arbor 48 from theirrespective"driving rollers. Conversely, releasing holding pressure on lever 92 will permit rod;80 to be drawn upwardlyzby its spring 82 thus lowering rolls 74 and 76 and-arbor 48 into contact with their driving rolls to simultaneously start the operation of the machine, and at the same-time lifting lever ,92. Nuts 94 and 95 are adjustablyca-rried by rod 96 to limit the movement of lever 92.

Arms 54, 66 and 68 are also interconnected by-means of rod 100 which passes through aligned openings formed in cars ,projecting 'fromtherespectiverarms. Anrabu'tmenti102 is fixed :to theru'pper end-of rod 109 -to"be:en gaged by"the upper surface of the ear carried byharmi54. Abutments 104 and 106 are fixed to rod '100:adjacent the lower surfacesofjthe earsatfixed to armsw661and68 respectively. Rod .100 Land :abutments 1182, P 104 and 106 function todisengage rollsl74.and 76ifrom'their driving rolls 42 and '48 .in the event ;of..yarn breakage or exhaustion. When the strand ;of, yarn being treated breaks or is exhausted, breakage rlever 60 is permitted to rise causing the stop-motion mechanism :to liftirarm 54 to disengage the winding package from roller Upward movement of arml54 causes-its ear to lift :rod 100, and the upward move'rnentof said rodeauscs abutments 104 and 106t0flift rolls, 74 and 76. Latch means are preferably provided to hold arms :54; 661and *68hin their elevated positions after they;havc beendi'fted by the operation. of the kno'ck-otfmechanism. Any convenient means can beprovided for releasingdhe'latches, as for.

example, the finger pieces 108.

A tension device 110 having a pair of yarnwguides 111' to upstanding "arm i120 'carried by bracket 80. *Aspirafor. 122' is connected topipe "IIS byuneans Of tab "124 and valve 126. Yarn guiding we [28 his ioned beneath the inletto aspirator and is supported by arm 130 in'turn carried-by arm 120. i

A reciprocating yarn guide 132 is provided for traversa ing the bulked strand of yarn longitudinally of winding arbor 48. Guide 132 is supported and reciprocated by traverse rod 134 which is journaled for longitudinal sliding movement in upstanding arm 136 carried by bracket 32. Traverse rod 134 may be reciprocated by any convenient means as, for example, a cam located adjacent one end of the machine and driven by the source of power which rotatesrolls 40, 42 and 44. A rotatable horizontal yarn guiding bar 138 is also supported by upstanding ar m 1316 slightly above and outside of traverse rod 134. Bar 138 is preferably rotated by suitable gearing, not shown, connected to shaft 38. A rotating yarn guide 140, Fig. 3, of'the type disclosed in U. S. Patent No. 2,63l,787, i ssued March 17, 1953, to R. V. Tata, is secured to rotatable bar 138 at a position slightly outside of the traverse stroke of guide 132, but within the length of a yarn receiving core carried by arbor 48. Rotating guide 140 is a generally disc-like member provided withradially extending fingers 142 that hold a running strand 'of yarn at one side thereof, the right hand side'as viewed in Fig. 1,for a predetermined length of time and .then pass the strand to the other side, to be picked u'pfbyguide 132, by engaging said strand in the space between any two of the fingers'142.

The above described apparatus functions in the following manner. A package of yarn P is positioned on shelf 26 in alignment with rollers 48,42 and 44. Rolls 74 and 76 and winding arbor 54 are lifted until their latchingmechanismengages' to hold them in their raised positions. Strand of-yarn Y is drawn upwardly from package P andis threadedthrough guide 112, tension 110and guide 111. From .guide 111 strand Y passes generally horizontally in a rearwarddirection and is passed around roll 76. -From roll 76 the strand is led upwardly and forwardly to pass beneath guide rod 128 and thence.upwardly through aspirator 122. Valve 126- is preferably opened at this time'so, that air passing through said aspirator will assist zin'threading said strand therethrough. Upon leaving the upper end of aspirator 122 the strand is drawn rearwardlygat approximately 90 to axis of said aspirator and; passes around roll 74. From roll 74 the strand is led upwardly and forwardly to pass around rotatable bar 138. The yarnis positioned on bar 138 on the right hand side, .as viewed in Fig. 1, of rotating yarn guide 140. After leaving rotating bar .138 the strand is led rearwardlyand is secured to arbor 48; At this time,:lever 92 is depressed to draw tension -rod80 downwardly, and the latches holding arms 54, and 68 in their raisedaposition arereleased .by means of latch finger pieces 108 topermitsaid arms to swing downwardly until their levers 78 engage abutments 98. Lever 92 is then raised to lower arms 54, 66:.and 68 to simultane ously engage rolls 74 and .76 with rollers42 and 40 and winding arbor .48 with roller 44. As soon as rods. 74 and 76 and winding arbor 48 contact their respective drivingirollera ya'rn is drawn from package P by roller 76 and fed to'aspirator 122 which sucks the strand in its lowermost end and discharges it from its uppermost end. The strandof yarn Y as it emerges-from aspirator 122is immediately drawn OUtOf' the stream of air by roll 74 and the now-bulked strand-is passed onwardly by that roll'to winding arbor148. Shaft 138 rotates at a relatively -slow -speed so that the initial run of yarn is woundadjacent 'one end of the-package core carried by arbor 48 iri the form of a tail. t The speed of shaft 138 is such that the running strand of yarn is not transferred to traverse guide 132,-until the process practiced by the apparatus is in balance and said running strand arriving at arbor 48' is completelytreated. In other Words, rotating guide causes the initial length of waste or improperly treatedyarn to be wound adjacent the end of the package so that it can be readily removedand thus riot-be incorporated :in any subsequent manufacturing operation.

Driving roll 40 rotates faster than either roll 42 and 44 and roll 44 rotates faster than roll 42. The difierence in speed between roll 40 and roll 42 determines the amount of bulking that is imparted to the strand being treated. The slower roll 42 runs relative to roll 49, the larger will be the loops formed by aspirator 122 and the greater their frequency. Roll 44 causes Winding arbor 48 to wind the yarn at a speed faster than it is advanced by roll 74. Therefore, the winding operation stretches the textured yarn a certain amount to standardize its diameter and to remove any irregularities that might occur in the yarn as it passes through aspirator 122. The final diameter or denier of the yarn being treated is determined and controlled by the speed of roller 44 relative to the speed of roll 40.

In the event strand of yarn Y breaks anywhere between package P and winding arbor 48, breakage lever 60 will be permitted to rise to initiate the action of the stopmotion mechanism associated with arm 54. The stopmotion will then lift said arm 54, and arm 54 acting through rod 100 and abutments 102, 104 and 106 will lift arms 66 and 68. Therefore, should the strand of yarn break between rollers 40 and 42 or between rollers 42 and 44 the feeding of the yarn will be effectively stopped.

Since certain changes may be made in the above apparatus without departing from the scope of the invention herein involved, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

What is claimed is:

1. In an apparatus for imparting bulk to a strand of yarn wherein means are provided for inserting loops into the individual filaments making up a running strand of yarn, the combination comprising a driving roller for rotating a winding package to wind the bulked strand of yarn, means supporting said package for movement towards and away from said roller, a pair of spaced driving rollers, a pair of yarn engaging rolls, means supporting said rolls for movement towards and away from said last mentioned driving rollers, one of said yarn engaging rolls being positioned to feed said strand to said loop inserting means at a speed greater than the speed at which it is wound on said package and the other being positioned to draw it therefrom and feed it to said winding package at a speed less than the speed at which it is wound on said package, stop-motion means associated with said package supporting means to move the winding package out of contact with its driving roller upon breakage of said strand, and means interconnecting said package supporting means and said roll supporting means whereby movement of said package supporting means by said stop motion moves said yarn engaging rolls out of contact with their driving rollers.

2. In an apparatus for imparting bulk to a strand of yarn wherein means are provided for inserting loops into the individual filaments making up a running strand of yarn, the combination comprising a driving roller for rotating a winding package to wind the bulked strand of yarn, means supporting said package for movement towards and away from said roller, a pair of spaced driving rollers, a pair of yarn engaging rolls, means supporting said rolls for movement towards and away from said last mentioned driving rollers, one of said yarn engaging rolls being positioned to feed said strand to said loop inserting means at a speed greater than the speed at which it is wound on said package and the other being positioned to draw it therefrom and feed it to said'winding package at a speed less than the speed at which it is wound on said package, and manually operable means interconnecting said package supporting means and said roll supporting means to permit said supporting means to be moved together to engage the winding package and said rolls with their respective driving rollers substantially simultaneously.

3. In an apparatus for imparting bulk to a strand of yarn wherein means are provided for inserting loops into the individual filaments making up a running strand of yarn, the combination comprising a driving roller for ro= tating a winding package to Wind the bulked strand of yarn, means supporting said package for movement towards and away from said roller, a pair of spaced driving rollers, a pair of yarn engaging rolls, means supporting said rolls for movement towards and away from said last mentioned driving rollers, one of said yarn engaging rolls being positioned to feed said strand to said loop inserting means at a speed greater than the speed at which it is wound on said package and the other being positioned to draw it therefrom and feed it to said winding package at a speed less than the speed at which it is wound on said package, stop-motion means associated with said package supporting means to move the Winding package out of contact With its driving roller upon breakage of said strand, means interconnecting said package supporting means and said roll supporting means whereby movement of said package supporting means by said stop-motion moves said yarn engaging rolls out of contact with their driving rollers, and manually operable means interconmeeting said package supporting means and said roll supporting means to permit said supporting means to be moved together to engage the winding package and said rolls with their respective rollers substantially simult-aneously.

References Cited in the file of this patent UNITED STATES PATENTS 1,845,565 Simonson et a1. Feb. 16, 1932 2,212,691 Kershaw Aug. 27, 1940 2,379,824 Mummery July 3, 1945 2,421,555 Fraser June 3, 1947 2,783,609 Breen Mar. 5, 1957 FOREIGN PATENTS 816,215 Germany July 8, 1949

Images