O'lf- 29, 1946. R. J. DE LAu'rHAuwEl-a , 2,410,020 MANUFACTURE OF WORSTED ROVING Filed March 15, 1944 ENTO Page Jofel@ £15afg/w51: R' BY ' MM, ATTORNEY. ~ l Patented Oct. 29, 1946 2,410,020 ' ~ :UNITED STATES Plrriz‘lvrv 2,410,020 - f ì îomer: \ l - VMA1vUFAC'rURE 0F WoRsTED RovING l Rene J. de‘Lathauwer, Hawthorne, N. J, l Application March 15, 1944, serial No. 526,580N 1 ' 2 claims. (ci. 19-130) « In the treatment of wool fibers to produce a or less cross-sectionally round and condensed _the fibers aremade subject to drawings in a suc cession of drawing machines, usually seven or more. In the first several machines, as the ñrst three or four, a gill-bed, and in the remaining state. Following the condensing the sliver,>or what as it now exists is known as a roving in this particular art, is formed into a wound mass, ason a suitably rotated roll or core, and thus "bal1ed” machines, a porcupine roll, is employed between the feed or retaining .rolls and the delivery or drawing rolls, each such expedient being active, while made toadvance at a speed between those 10 -of the corresponding Vfeed and delivery rolls, to 2 to each other, thus developing the` sliver to more usliver in condition for spinning into worsted yarn in preparation to undergo again these steps in the next succeeding drawing operation or, the last drawing being completed, to pass to the spin ning operation. ` „ The object‘of the present invention is -to pro duce a sliver product, or roving, in condition ,for effect what I herein term a slip-draft combing, or -to hold back those fibers that are not actually spinning into worsted yarn .which shall be sub y_nipped by the delivery rolls and that would other wise, as an incident merely of friction existing 15 stantially as completely and evenly or uniformly drafted'as by the conventional procedure but to between them and the ñbers actually so nipped, do so in a way to reduce the equipment necessary be advanced by and with the latter ñbers, thus to and obtain a considerable saving in power, time defeat the purpose of the drawing operation or and labor.` , ‘ o `the eiïecting of as uniform lengthwise dispersion To this end, instead of passing the material of all the fibers as possible. Incidentally, as is through the` seven or more stages indicated in well known to workers in this art, the sliver can order finally to produce a roving suitable for spin withstand andrequiresI a more strenuous slip ning into worsted yarn, I proceed as follows: Each ,draft combing in the early part of the whole of at least two slivers is subjected, while being treatment than in the later part thereof where it approaches or actually attains a quite frail con 25 continuously advanced, ñrst to simultaneous drawing and slip-draft combing and thereafter dition, wherefore well known expedients are used, to drawing and slip-draft combing of which vthe that is, gill-beds, with their closely related and former combing is more strenuous than the latter numerous pins or gills, are used in the early part _and meanwhile the intake speed of the second `,of the whole treatment and porcupine rolls, with drawing is preserved substantially equal to the ,more widely spaced and less numerous pins or output speed of the ñrst drawing, whereupon the quills,` are used in the later part; and these two thus-treated sliver is condensed and packaged; expedie'nts diiïer in other respects affecting the thereupon the thus-treated slivers are combined disposition of their pins. In respect to any one to form a doubled sliver and such doubled sliver `of the several drawings the conditions are as fol is subjected to the same treatment as each sliver lows: At least two separately formed slivers, each has undergone inclusive of at least the condensing a more 0r less initially cross-sectionally round or thereof, thus to produce a roving in condition, at other Vthan flat strand, doubled (that is, lying `least as to draft and condensation, to pass to the side by side and in close contact with each other), spinning operation, though usually following such pass between the feed rolls and the delivery rolls, Y being meanwhile subjected to the slip-draft 40 -condensing and Vduring the advance of the dou bled sliver it will also be packaged. Whetheiuor combing action of the gill-bed or the vporcupine ,not the `ñrst-named slivers are simultaneously -roll, as the case may be, whereby they come to treated is of course immaterial. Further, each of exist blended and merged into what is a unit or such ñrst-named slivers will in practice usually, >single sliver considerably greater in length than either, and of `less weight per unit of length than 45 itself, comprise two or more sliver-components, as I herein term them. Preferably »in each stage the combined weight, of its component slivers, Y(to wit, in which each of the first-named slivers fhaving become more or less'flattened in the proc is treated, and in which the doubled sliver is ess. Following each gill-drawing operation such treated) blending of the ñbers by transversely >s_liver is next subjected to a false-twisting oper compacting them is eifected. , By following this ation eiîectedïby a back-and-forth rotated fun nel, and following each porcupine-roll drawing _operation the sliver is next subjected to a rolling operation effected by a pair of endless aprons which are advanced with the sliver and also re uciprocated transversely thereof and oppositely 50 procedure thenurnber of drawings is reduced to four each, instead of seven ormore, and the con densings and packagings or ballings are reduced "to two each. insteadof sevenor more, with a con sequent considerable economy in equipment, 1a ,bor, V'time and power.` ` 2,410,020 In the annexed drawing, both views appearing being diagrammatic, Fig. 1 is a side elevation of the improved sys tem; and Fig. 2 a plan of the lower elements shown in Fig. 1, with the slivers appearing in broken out line. At I-Ia, are the feed rolls and at 2-2a-2b are the delivery rolls for the ñrstdrawing >opera tion of the first stage. So as to exert pressure on 10 the slivers roll I rests as usual on roll Ia and roll 2 on the pair of rolls Zar-2b. Between the feed rolls and the delivery rolls is any usual type y ' of gill-bed 3 used in wool drawing. Each of the „ rolls Ia and 2a--2b is the positively driven rollof its group, roll I being driven from roll Ia andv roll 2 from roll 2a-2b by traction. Aft of the delivery rolls are fixed chutes or tunnels :c each of which narrows and so compacts 4 in any event each of the four masses of fibers here shown exists as what I shall hereinafter, in this description and in the appended claims, term a “sliven” Such sliver, attenuated by the gills and thereupon reduced in width by funnel .'v, and with its fibers more or less blended, is de livered by the delivery rolls 2--2a-2b to the feed rolls 4-4a of the second drawing means, to wit, in neutral state in transit from rolls 2-2a--2b to rolls 4-4a insofar as draft or lack of draft is concerned because the rolls 2-2a-2b and A-lia rotate at the same peripheral speed. The sliver, here by the porcupine roll attenuated, ‘ and again reduced in width by funnel y, and with its fibers still more blended, is then subjected to the rolling and hence condensing action of - the aprons and ñnally is balled at I2-l3, for this latter purpose being delivered, as usual, via a spout I4 to the balling means with a neighbor the ñber mass presented to it transversely, they 20 ing _roving that has been produced in the same discharging close to the nips of the feed rolls next way' ‘This as completes itself. ' the first stage as ‘ ity will ` pref to`be referred t0. , ` At 4-4a are the feed rolls and at E--Sa-Eb are the» delivery rolls for the second drawing op eration of the first stage. So asv tc exert pres sure on the slivers roll‘d rests on roll 4a and roll erably be> practiced in performance of my inven tion. To complete the treatment to produce a roving in the state required for spinning the product, or thus treated sliver, of the first stage is made to undergo again the same operations as in said ñrst stage, that is to say, when combined with a sliver that has been treated in the same -roll 6 resting on roll 6a so as to exert pressure on the slivers but being as usual in offset relation 30 way and so as to form therewith what I `term in the appended claims a “doubled sliver.” 'thereto in the direction of> advance of the sliver. 5" on the pair of rolls 5a--_5b. Between these feed rollsI and delivery rolls is the pair of rolls 6-6a, Between rolls Iì--Ba and the delivery rolls is the porcupine roll 1. Rolls 4a, 5a and 5b, roll 6a and Of course, according to my treatment, aswell as in the case of the conventional treatment hereinbefore set forth, the more strenuous pri rnary slip-draft combing action, as by the gills, is necessary andpossible because of the greater >onA which they respectively rest. stability and cruder character of the slivers, and Aft of delivery rolls 5-5a-5b are fixed chutes the less strenuous secondary slip-draft combing or funnels y which narrow the sliver transversely, action, as by the porcupine roll, is necessary and discharging lclose to condensing means thus: 'I‘heV condensing means consists of a lower pair 40 possible because of the then reduced stability and more refined character of the slivers. But my of: rolls 8, embraced by an endless apron 9, and invention involves` providing for two successive three upperv rolls I0, embraced by an endless the porcupine roll 1 arev positively driven, rolls 4, 5' and 6 being driven by traction from the rolls drawing operations respectively accompaniedV by apron I I, the lower apron having its upper stretch slip-draft combings of which the one appertaln' lhorizontal and the upper rolls being of such ing to the first drawing is more strenuous than relative diameters and so arranged that the up that appertaining to the second drawing and in per apron coacts with the lower apron to roll further rotating the feed rolls for the second such >and thus condense the slivers passed between operation at the same peripheral speed as that I them when the aprons are subjected to recipro of the delivery rolls of the first, or,` inother` cation transversely of the slivers and reversely 50 words, entering the slivers to the second drawing toeach other in the well known manner. at an input speed which is equal to the output To thev right or aft of the condensing means speed of the first drawing. If. that is done,` thus is the balling means comprising a lower roll I2 aIîording one stage in the whole treatment,~ and and a roll I3 resting thereon and on which the such is then repeated, thus to afford the second -winding orA balling is effected.` Roll I2 is posi 55 stage, there need be only four drawings, with tively driven. ’ driven in the same direction, or here so that the their four slip-draftcombings, two condensings and two ballings, and, as practice has shown, -slivers. are advanced to the right. Roll 2a is driven at a faster speed than roll that produced by the conventional procedure. ‘ fRoilsv Ia, 2a, 2b, 4a, 6a, 1, 5a, 8 and I2-are all the >resulting product is as> goed in quality as The condensing and packaging are herein -In so as to effect the first drawing, and rolls 60 shown and described as effected after .the man .5a-_5b are driven at a faster speed than roll 4a ner of what` is known` as the “French” method se as to effect the second drawing. And of course of treating, wool fibers in preparation for spin rolls 8 and I2 are driven at at least a speed not less -than that imparted to the slivers as delivered by' thesecond drawing means, thus to perform _theirintended functions of condensing and _ball ing. ‘ ning; but it is to be understood that my inven tion is not correspondingly limited, inasmuch as those steps could obviously be performed- in ac cordance with what is known as the “Bradford” . method of‘treating wool übers in preparation for But feed roll- 4a of the second drawing means is spinning, to wit, by resort to fliers and bobbins driven yat the same peripheral speed as the de 70 by, which the slivers would be more or less twisted livery rolls 2a-2b of the first drawing means. and in that state. wound on bobbins or spools. In Fig. 2 four pairs of sliver-components, as Having thus fully described my invention, what a-a in each pair, are shown by way of example. I claim is: v ' Y _« , Those of each pair exist side by side and in con l. The method `of drawingA wool ñbers.- to pro. tact with each other, as usual, on entering the first drawing means and in that sense doubled; duce ’a roving in condition for spinning ' into 2,410,020 worsted yarn which consists in subjecting each of at least two slivers comprising such fibers, and while continuously advancing such sliver, first to simultaneous drawing and slip-draft combing such as by gilling and thereafter to simultaneous drawing and slip-draft combing such as by the use of porcupine rolls of which the former combing is more strenuous than the latter and meanwhile maintaining the intake speed of the second drawing substantially equal to the output speed of the first drawing, there upon condensing and packaging the thus-treated sliver, and thereafter Combining said thus-treated slivers to form a doubled sliver and subjecting former combing is more strenuous than the lat ter and meanwhile maintaining the input speed of the second drawing substantially equal to the output speed of the first drawing of such doubled sliver, and ñnally condensing the thus-treated doubled sliver.' 2. The method set forth in claim 1 character ized by coinpacting transversely the iibers of the first-named sliver between the two first-named drawings and slip-draft combings and also be tween tne latter drawing and slip-draft combing and condensing of such sliver, and compacting transversely the ñbers of said doubled sliver be tween the two drawings and slip-draft combings such doubled sliver, while continuously advancing 15 hereof and also between the latter drawing and the same, first to simultaneous drawing and slip draft combing and thereafter to simultaneous drawing and slip-draft combing of which the slip-draft combing and condensing of such dou bled sliver. RENE J. DE LATHAUWER’.