Патент USA US2120187код для вставки
June 7, 1938. H. A. RAYNOR 2,120,187 KNITTING MACHINE AND METHOD Original Filed Feb. 14, 1936 s sheets-Sheet 1 #O @d J .lIu\,\dl 52I5 W... m_= l` June 7, l1938. H. A. RAYNOR 2,120,181' KNITTING MACHINE AND METHOD Original Filed Feb. 14, 195 6 3 Sheets-Sheet 2 June 7, 1938. H. A, RAYNOR 2,120,187 ' KNITTING MACHINE AND METHOD origin-a1 Filed Feb. 14, 193e 4 IlLE á s sheets-sheet s _ y l_ 3y Janv/wu I ¿'Zá’; ATTORNEYS _» APatented June 7, 1938 ¿ _. _. 2,120,187 , » «UNITED .STATE-.S `_pAT1-:arf_for1=1CE`ï s , KNITTING _ `Harry Avery -Raynor, Wollaton Park, Nottingham, ngland ’ original application February 14,1936, serial Naf 63,925, -now Patent No.I 2,108,925. Divided amav this >application April -30, 140,020. 1937, « Serial No. In Great Britain February 15, 1935- ' 3 claims'. ¿(01. cfs-9)> This' inventiòn is for a knitting machine and >a. loops thereof through the _pierced weft thread method of machine knitting- and the invention Aand to cast off the latter in knitting. The invention is particularly applicable to _ _ relates to the prodnctionof- that type- of fabric embodying one or more thread bars, other than elastic knitted fabrics, i. e. fabrics including elas tic threads; and in' this connection the aforesaid the stitch 'thread'or threads, extending weft-wise of the fabric, i. e. in the direction of the stitch courses,V and anchored in the _fabric _by stitch Cl Y ' i loops. ' - Y _' _ . » - composite weft bar or each or- selected of same securedin the fabric may embody a plurality of elastic .strands extending alongside each other , Heretofore a knitted fabric of the above type has been proposed embodying> a transversely ex tending strand or plurality thereof locked in the andsuitably bound together, one or more of said elastic strands being vanchored by stitch loops 10’ "of one stitch course and another or others by loops ' _ fabric by loops ofthe fabric extending through of a succeeding course. thestrand or each of same. In this proposed fabric, however, the > transversely -extending - For the purpose of more'fully describing the I nature of this invention reference will now be strand _or each strand through which the' fabric ' made to the accompanying drawings, wherein: loops pass is constituted by a single thread such . - ' Fig. 1 _is a face view of va portion of rib knitted as a wrapped elastic thread individually'intro- _ fabric according to this invention. duced-and locked in-the fabric, and in the pro? -li‘ig. 2 is a section through the fabric. -Fig.- 3 is a face View of ai modified fabric. Fig. '4 is a section of thezfa'bric shown in Fig. 3. 20 duction of the fabric> on a circular knitting maf chine only one strand is fed tothe machine. - Figs. 5 to 14 inclusive- are' detail Views illus- . A characteristic-feature of the fabric-made by . the exercise of the present invention consists in. - trating-successive steps in the production of the \ ' a weft-wise extending bar or >bars each _of which _ fabric shown in Figs. 1 'and~2. embodies a plurality of cores, pillars or 'strands"_ _' Fig, 15 is an _ elevational view of part of a circu extending alongside' each other and -so con _ lar knitting machine for producing the fabric. Fig_._16 is an enlarged detail-view of part of the Y nected 'as to be simultaneously introduced into . the fabric as a composite bar">> or braid> and.> -'machineshown _in Fig. l5 but looking at same. ` anchored» in a fabric by'loops which pass be-.-~ ~from the opposite side. Ytween Ysaid cores', pillars or strands. vBy provid- . - Fig. 17 is afdetail -view showing one method of Y ing a plural core or plural stranded weft bar- in y making a dual stranded weft for incorporating lieu of a single strand weft, it be appreciated in the knitted fabric.' that the production of the fabric is considerably By way of. example, the invention will now Vbe ' facilitated, as any'difficulty experienced inv cans--` Vdescribed as-applicdto a rib knitted fabric, e.v g. I ing a _needle and stitch loop to pierce a single Í‘ a one-and-one _rib having incorporated therein strand, and particularly the 'encircling covering >Weft'wise extending elastic-thread bars I. ' Each 35 of a single elastic or other thread, is. eliminated, it being amatter of comparative ease to pierce a composite weft bar or braid .between -the cores or strands. Additionally, the passag'ejof loops be40 of- the said weftthread barsl may consist of two' _ rubberstrands or threads 2 each wrapped with ' one or 'more layers 3 of cotton or other desired ' .yarn in the well-known manner, and the two provides a more secure and positive anchorage of wrapped -rubber strands -2 _being _connected or 40 bound together alongside each other so as to con the >weft in the fabric. ' stitute a narrow braid, the covered elastic strands tween the cores or 'strands of a vcompositevweft ' - ' ' constituting .longitudinal pillars in said braid. chinehaving hooked needles, means for feeding _ '_This braided weft l is so incorporated inthe rib The present invention provides a'lç-nitting ma. 45 knitting thread thereto, means for operating said needles to knit loops of said thread, means _for feeding a >weft thread to the needles,`means"for locating said weft thread below' the points of the needle hooks, means for causing said pointsI to _' pierce said weft thread', means for clearing said _ pierced weft thread over the bends of the hooks of Y the needles that pierce it onto the stems of said » needles, -and means for operating said weft-trans '55 fixing needles to take knitting thread and to draw fabric that one of the covered elastic strands or 45 pillars-2 .extends between and is gripped between the front stitch loops l and rear stitch _loops 5 of one stitch course, while the other covered elastic strand or pillar of the same braided weft ex-‘tends between and is gripped between the front 50 and rear stitch loops 4 and 5 of the next succeed ing stitch course; the stitch ’loops at oneside of 'the fabric, _that is to -say either the front loops 4 vor rear loops 5 passing through thebra'ided weft l between the said elastic strands or pillars 2 so 2,120,187 2 as positively to anchor Athe weft from displace ment in the fabric. y _ The above-described fabric can be produced on any suitable type of rib knitting machine, and Ul by way of example the production will now be described of a fabric according to Figs. 1 and 2 on a circular rib knitting machine, reference be ing made to Figs. 5 to 14 of the drawings. For convenience of description the operation of a 10 single cylinder needle 6 and its co-operating dial 15 20 25 30 courses, the cylinder needle stitch loops being drawn through the braid between the strands thereof so as positively to lock the braid in posi tion. _ y « By feeding the dual strand braid at alternate Cl courses, that is to say by causing the needles to pierce said braid at alternate courses, an elastic _ strand is incorporated in each successive course of stitches as before described. If desired, how ever, the stitch courses embodying the braided l() weft may alternate with other courses devoid of.v weft. The weft I when incorporating elastic threads may be fed to the needles under suitable needle 1 is referred to. Let it first be assumed that the cylinder needle 6 and the dial needle 1 have been retracted to the knock-over position with the last made stitch loops 8 and 5 carried ' tension and means are provided for guiding the Í in their hooks (Fig. 5); the cylinder needle 6 is weft to the needles so as to ensure said needles now projected to a tucking height with the stitch piercing the weft between the elastic strands thereof. loop 8 over the latch, the dial needle 1 being re In Figs. 15 and 16 is illustrated a part of a cir tained retracted (Fig. 6). The cylinder needle 6 during the lowering thereof is now brought cular knitting machine . showing more clearly round into engagement with a toothed or tricked how the dual stranded braid is fed to the cylin 20 rotatably mounted wheel or disc III which is der needles. The braid I is drawn from a suit able rotatably mounted supply I8 and passed ' formed at its periphery with a horizontal chan nel I2 through which the dual stranded elastic through a guide I9 and between the circumferen braid I is fed, said braid being fed horizontally tial faces of a pair of truncated conical feeding beneath the hook Il of the cylinderneedle 6 in rollers 20 resiliently pressed together by a spring 25. such a manner that the tip or point of the hook is 2I or other suitable means. The speed at which the braid I is fed to the machine can be ad caused during the continued downward move ment or retraction of the Vneedle to pierce the ljusted as required by moving said braid upwards or downwards between the rollers 20 so as to co braid between the two elastic strands or pillars 2 thereof (Fig. '7).- As the braid I is drawn by the act with the varying diameters of said rollers, 30 and this may be accomplished by imparting rota needle hook I I out of the channel I2 in the mem ber III said braid is brought into a position with -tion to a screw-threaded rod 22 on which is the two strands 2 thereof located vertically one mounted an arm 23 retained from rotation and , above the other (Fig. 8), and the needle 6 then carrying the guide I9, the rotation of the screw 22 traversing said guide arm 23 up or down as passes beneath the periphery of a horizontal ro tary disc or the like I3 which'acts on the dual ` stranded braid l to press one of the strands thereof over to the back of the needle hook and bring the pressed over strand of said braid above 40 the loop 8 (Fig. 9). 'I‘he cylinder needle 6 and dial needle 1 are now simultaneously projected to a thread feeding position, and in doing so the stitch loop 8 on the cylinder needle together with the dual stranded braid l is cleared below the cylinder needle latch, and the_ stitch loop 9 on the dial needle is also cleared behind the dial needle latch, and a new thread I4 is fed to both required. The braid I after passing between the feed rollers 20 enters a flat channel 24 of a fixed guide member 25, which channel 24 brings the braid into position with the two strands 2 there of horizontally disposed, and from this channel 40 2l the braid is guided into the horizontal channel I2 at the periphery of the aforesaid rotatably mounted toothed or tricked wheel ID, and the rotation ofsaid whee1 may be effected by the needles coacting with the teeth or tricks there of. This toothed and channelled wheel I0 serves to feed the dual stranded braid I_ beneath the hooks oi’ the descending needles and positively needles. The cylinder needle 6 is now retracted and hold said braid in the_ correct posi to the knock-over position and in so doing a loop - locate tion for ensuring that the points of -the needle 50 50' I5 formed from the thread Il is drawn through hooks successively pierce the braid midway in its the old loop 8 and through the braid I midway in its width between the elastic strands 2, said width, i. e. between the strands 2; saidbraid braid I being thereby knocked over with the old being held up against the needle by which it is loop 8 (Fig. 11). Following this the old loop pierced. As the needles leave the teeth or tricks 55 9 is knocked over from the dial needle 1 and a new loop I6 is drawn thereby from the thread I4 (Fig. 12). The two needles 6, 1 are now simul taneously projected to clear the last formed loops I5 and I6 and receive further thread I1 (Fig. 13), and said needles are operated in the customary manner to form further- stitches from the last in the wheel I0 the braid I assumes a position on 55 the hooks with the strands 2 thereof one over the other one inside and the other outside the hooks. After piercing the braid and while the cylinder needles are retracted, the part of the dual strand ed braid outside the needle hooks is pushed over to the back of the needles by passing beneath the horizontal disc I3, which disc also functions to fed thread (Fig. 14). IBy> the above-described‘operation it will be bring the strands 2 of the braid I side by side. From this position the machine' operates in the seen that one of the strands 2 of the dual strand 65 ed braid I becomes embraced between stitch manner previously described to draw thread loops loops produced on the cylinder and dial needles, between the strands of the braid and fasten the en_ 4 that is to _say between the front and rear stitch latter in the fabric. The particular construction of the fabric em loops of the fabric, and the second strand of the , - braid is so located as to become embraced be 70 tween the cylinder and dial stitches produced at the next succeeding course; it being under stood that at said second course the dual strand ed. braid is not fed to the needles. Thus it will be appreciated that the two strands 2 _of the braided weft I arel embraced in succeeding stitch bodying the plural stranded weft bars I may be varied without departing from the scope of the 70 present invention. For instance fancy effectsv may be obtained by introducing at intervals dif ferent types of stitches and/or different-kinds of stitch thread, and as an example a modified form of- rib fabric is illustrated in Figs. 3 and 4 75 3 2,120,187 10 15 20 25 30 40 wherein, as lcompared with the fabric shown in -.1. A method of producing fabric on a rib knit Figs. 1 and 2, an additional thread course 2B is introduced at predetermined intervals and tuck stitches 21 are formed in alternate needle wales at said additional courses, said tuck stitches pref ting machine comprising the following sequen tial operations, namely:-- producing knitted erably occurring in the wales produced by the set to 4a tucking height, simultaneously feeding al needles 'I. If the additional course 26 with tuck ` below the hooks of said projected needles a plu stitches 21 is knitted immediately after intro rality of weft threads or strands connected to ducing and anchoring each plural stranded weft gether side by side to form a composite bar, re bar I, and the tuck stitches are made in the stitch tracting said needles to cause the hooks thereof 10 wales appearing at the back of the fabric, i. e. to pierce the plural stranded weft at a position on the dial needles, the effect produced is to between said strands, pressing said plural shorten or tighten-up‘the cylinder needle stitches stranded weft over the needle hooks so as to bring which are drawn through the weft braid I at the one or more strands on one side and the remain front of the fabric, >thereby bunching-up y the ing strand or strands on the opposite side of the fabric over the anchored weft braids I and form needles, projecting needles of both sets to clear ing outstanding ribs or lines running weft-wise the old loops thereon and feeding stitch thread of the fabric as at 28 in Fig. 4. The thread in thereto, retracting the needles of both sets to troduced for making the additional stitch courses clear the old loops thereon and feeding stitch 2i with tuck stitches may be different from that thread thereto, retracting the needles of both used in making the remainder of the fabric. sets to produce a new course of stitches and in so For example, the main fabric may be made of doing to cast oif the plural stranded weft bar cotton or wool and the additional courses 26 of and draw stitch loops therethrough and subse artificial silk thereby producing projecting vlines quently operating the needles of both sets to pro of artificial silk on the fabric face. duce a further stitch course. . 25 The braided weft I embodying the elastic 2. A circular knitting machine embodying in strands 2 may be produced on any suitable braid combination a needle carrier with needles mount ing machine. For example, a machine may be ed to reciprocate therein, stitch thread feeding employed wherein a plurality of spindles (e. g. means, means for feeding under tension and at six) traverse an endless track of double-loop an adjustable speed a composite weft composed or ñgure eight formation, a rubber strand be of a plurality of elastic or other cores connected ing fedv within each loop of the track. In Fig. together side by side, a rotary wheel or disc hav 17 is shown a small portion of dual stranded ing peripheral teeth or tricks adapted vto be en braid illustrating how same may be constructed. gaged by the needles and also having a peripheral 'I‘he two strands 2 are each spirally wrapped with channel functioning to guide the plural stranded cotton or like covering threads 29, and the strands weft beneath the needle hooks, said channel co so wrapped are bound together side by side by operating with needles coacting with said wheel binding threads 30 which pass alternately over teeth or tricks to hold the composite weft up one covered strand and beneath the other strands against said needles and locate said weft so that in the manner of a double-loop or figure eight, the points of the needle hooks pierce said weft the said binding threads intersecting each other between the strands thereof, and means for press between the two strands so as to space or divide said strands suñlciently for enabling a needle to pierce the braid between same. Where the cov 45 ered or wrapped strands 2 are of rubber the spi ral twist of the covering 29 of one strand is ad vantageously opposite to that of the other strand, as shown in Fig. 17, so that the finished braid is maintained flat. 50 stitches on two sets of needles which draw loops in opposite directions, projecting needles’ of one This application is a division of application Serial No. 63,925, ñled February 14, 1936, which eventuated into Patent 2,108,925. I claim: ing one or more of the strands of the weft so pierced over on to the back of the needles and maintain the remaining strand or strands on the front thereof. 3. A circular knitting machine according to claim 2 wherein said machine embodies two sets of needles functioning to draw stitch loops in opposite directions to produce rib fabric and wherein the composite weft is fed. to one set of 50 needles, e. g. the cylinder needles, only. _ HARRY AVERY RAYNOR.