US2404218A - Apparatus for drawing - Google Patents

Description

y 6; 1946. A. YCROSSLEY 2,404,218 4 APPARATUS FOR DRAWING Filed Sept. 2, 1943 j 7% mvEN'ro Kala-0a ATTORNEYS Patented July 16, 1946 APPARATUS FOR DRAWING Arthur Crossley, Wauregan, Conn, assignor to Wauregan Mills Incorporated, a corporation of Connecticut Application September 2, 1943, Serial No. 501,016

3 Claims. 1

This invention relates to spinning, more particularly to the spinning of cotton yarn or a strand formed of staple fiber analogous thereto.

In the working of cotton fibers after a sliver has been formed in order to reduce this sliver from a soft thick fleecy form to a hard twisted thread the sliver is subjected to a succession of drafting operations which elongate and simultaneously reduce it in size until in the last stage it reaches the condition of a finished twisted commercial yarn. These successive drafting opera tions whereby the sliver is converted into commercial yarn require, in present mill practice, simple drawing and twisting operations carried out successively on a number of separate machines. At the end of each of these various drafting operations the; strand is wound upon a spool or bobbin and thentransported to the next machine where further drafting operation takes place and so on until the final yarn is produced. As the sliver is reduced in size it is sometimes referred to as roving and in other'stages referred to as yarn. However, in this specification I use the word strand as indicating the sliver, roving, yarn, or thread in any of its various conditions from beginning to end. I

One of the objects ofthis invention is to provide in a singl drafting frame a high draft of the strand. j v v Another object of this inventionis to simplify the various steps in drafting or attenuating strands by eliminating certain packaging operations and the number of machines or separate units which are utilized to accomplish the results. Another object of this invention is to provide in one unit or spinning frame a drafting which has heretofore been accomplished by two or more frames, thus eliminating a packaging operation which occurred between the twoframes bydoing the work in one machine or mechanism.

Another object of this invention is to cause drafting in a plurality of stages with a transfer of the strands from one stage to the other without drafting whereby a control of the strand is provided which will permit of successive operations.

Another object of this invention is to control the strand and fibers thereof between successive operations of a drafting or attenuating character.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully describedand particularly pointed out in the appended claims.

In the accompaying drawing:

Fig. 1 is a sectional view looking endwise or axially of the rolls; h

Fig. 2 is a top plan view illustrating somewhat diagrammatically the. drive and'with the top rolls omitted. Y r 1 In proceeding with this inventionI provide a group of rolls for performing a usual draft of the staple fiber strand and in the sameroll stand I provide asecond group ofrolls for drafting the strand a further amount, which second group may perform a draft which has heretofore been performed upon the strand. The transfer of the strand from the first group to the second group of rolls is without-draft and the delivery of the strand from the first group is such that thestran'd is traveling at substantially the same speed as it is received by the second group. Inthe second group some condensing means such as a. trumpet may be used if desired. Z

With reference to the drawing I0 designates'a supporting deck of the spinning frame upon which rests the pedestal II with the L,-shape bracket I2 upon which additional L-shaped brackets l3 and M are positioned and held in adjustable relation by the bolts l5 and I6. Each of these brackets are provided with bearings for the drafting rolls, these being provided in such a manner that adjustment of the distance between back and front roll centers of the roll groups may be had. A group of rolls designated A comprise'a back feed roll l8, an intermediate feed roll l9, and a delivery feed roll 20, which rest in suitable bearings in the roll stand brackets at intervals spaced along the frame and are driven from one end of the frame; Upper rolls 2|; 22, and 23 are provided with a clearer 24 for picking up fibers which wrap about these upper rolls 2| and 23.

A second group of rolls designated B comprise.

'ing lower feed roll 25, intermediate roll 26 and delivery roll 21 are mounted in suitable bearings on the roll stand brackets at spaced intervals of the spinning frame and are driven by gearing at one end of the frame. These rolls are also arranged in pairs with the upper or top roll 28 for the roll 25, 29 for th intermediate rol1 26 and 30 for the delivery roll 21. A clearer roll 3| is provided for this top roll 30 while a clearer .roll

32 isprovided for the lower delivery roll 21.

Eachjof the top rolls is supported in slotted bearing blocks mounted upon over arms 33 which extend from suitable supports 34 at the rear end of the roll stand and are held in position by set V screw 35. Each of these over arms carries a block 36 which is slotted as at and on opporeater for roll there will be ,a breaker site sides so as to receive the trunnion 39 at the opposite ends of the upper rolls of the pairsof rolls which grip the strand to be attenuated.

The lower rolls are driven through gearing as diagrammatically shown in Fig. 2. The main drive shaft 38 drive gear 36 which drives directly their nt delivery roll 21 by a gearjyiflnqesh gear 36; Feed 'roll 2510f 'groupB ing with:

is driveii'from'the main drive shaft 38 through the gears 39 and 40 on the roll shaft 25 while I r the intermediate roll 26 is driven from the gear 4| through the idler 42 meshing with the gear 43 on the shaft of the intermediate roll 26. The

shaft 44 of the feed roll 25 is" extended onrthe opposite end of the machine for "the drive of the" group of rolls l8, l9, and 20. Gear 45 on shaft 44 drives idler 46 on shaft 48 while int lrn e r:

41 drives gear 49 on shaft 50 which provides the. drive for the delivery roll 20 of the roll of group A. The drive is takenfrom this shaft 50 byv means of gears 5| and-521 drive shaft 53-Whi1e from this shaft the feed roll I8 is driven by'means of gears54' and 55 on shaft 56 which-is the shaft extending to the roll IS. The intermediate rolls l9 are driven from the shaft 56 by gear drivinggear 58 on an extension of the roll'lS through intermediate gear 59." This manner of drive will permit of great flexibility through the change gears "whereby a wide variety of drafts may be.

P ded ,l a e e I i The drive r r the 10115 is so constituted that'the surface speed or the roll and-the roll as will be' 'substantially the sam'e'so that there 'is no draft betweenjthe rolls of group A" and the rolls ofjgroup-B; The surface speed may be'slightly so as to'just keep tension on draft iscontemplated. By this the "yarn' but no arrangement a mcety of control of the strand is provided and the fibers are not unduly spread For "example I provide-a draft of about 5 in the'rolls of'group 'A- while I provide adraft of about 20,v in the rolls of-group-B; Thus the total dr aft will-befthe productof these two '5' X 20 "equals 100, This 'draftmay be distributed so draft of from 'l.37-to"1. 5- (4.5

[8 and I9 while the remainder i betweenjjtheroll I i 'o'ffthe 'dra'ftlwill be between rolls I9 and 2a. n1 group B the breaker draft between rolls Hand 26 will be" from I the draft will be'between rolls Zfi and'21.

Suitableweighting'ineans may be provided"for the upper roll-s such a 2| andZSiZB and '30jwhich has not, been cient 'to provide a good hip or gripupo he strand 'Whichis' passing through the apparatus. Preferably the intermediate rolls-2'2 and29 will be self weighted and of such character as to permit of some slip occurring along their surfaces.

1 {The slip "arrangement of the intermediat'e rolls may, be as shown" in my tic-pending application or may be of a usual'charac'ter' atthese' locationsj 1.02 to'1' .5 while'the rem'ainder of also supported on a traverse bar 64 which may cause the yarn to be guided in its travel back and forth along the rolls to distribute the wear thereon. This trumpet arrangement 63 also serves to condense the fibers as they are being drawn in the second group of draft rolls B which may be advantageous in such yarn where the fibers areparticularly unruly and tend to spread. I do not consider, however, that it is essential .that a condenser be used.

After the yarn is delivered from the rolls 21, 3llit is taken up on a bobbin or package 65 being led thereto through a thread guide 66 and traveler .61 moving about a ring 68 which has a traverse motion along the package 65. Twist is placed into the yarn in a desired amount which runs-back substantially to the delivery rolls, binding .in all of the fibers and making a strong strand'yarn, 0r thread for subsequent use.

I claim: Y

1. In a spinning apparatus,a group of three Y rolls of said secondgroup and thedelivery rolls i of the first group and a' second slide adjustable relativevto said means "and the first slide for mounting the intermediate and feed rolls of's aid firstgro P-f e In a spinning apparatus; a plurality of drafting :units positioned in tandem, each comprising"pairs oi front draft roll s, intermediate drafts rolls and feed rolls, a slide for mounting the front lower draft roll of'one' unit and the lower feed and intermediate rolls of the adjacent unit; a secondslide' for mounting the lower intermediateiand feed rolls in the unit of the .s'aidfront lower draft; rollja'iidmeans for mounting "the" lower denvery you or tlie said adjfalcel'it 'unit, said slides being relatively movable for adjustingfth'espacing between the front diaftroll The strand which is t bejdi-aite designated tically'supported on the rear of thedechl fl and led to the feed'rolls 18:21 throughsome guid or trumpet 6|, "carried by a traver ejba 62 strand along the feed rolls.

7 'Invso'me cases a trumpetorgui'de Isms-pro Vided'betwee'n rolls' 25,"28,"and ga 2's, which may which is reciprocated to traverse thejyarrr or I generally 69 extends from'a suitable package verjand'jthe" intermediate draft roll of eithereunit without disturbing the-spacingof the rolls of the adjacentunit. 3;In ai's'pin 'ing units; positioned in "tandem, "each comprisingpairs' of front" draft rolls, intermediate draft rolls and feed rolls, a slide for mounting the;

front lowerdraft roll of one'unit' and the lower feed and intermediate rolls of the adjacent unit, a second'slide supported on'thefirst aidslide for 'mounting'the lower intermediate and feed rollsin the unit of the said front lower draft roll, and means formounting the lower delivery roll 'ofthe said adjacent unit, said slides being relatively movable for-adjusting the spaoing' between the front draft roll and the intermediate draft' roll of-either unit without disturbing the 7 spacing of the rolls ofthe adjacent unit.

. be'j in the'form 'of'a trur'npet or iu ei i e guide ARTHUR CROSSLEY.

'ng apparatus, a plurality of draft

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