Патент USA US3045721код для вставки
July 24, 1962 E. J. GIBBoNs 3,045,71 l TWO-FLY OR MULTI-PLY NARROW WOVEN FABRICS Filed Sept. 5, 1958 »uwtw@ "w ,È Q, a è `o I o A Í W " In» : @aß/Ä ` : e f2 «M Inventor Edwin J. Gibbons Patent G ” IC@ l, 3,@¿i-5Ãll Patented July 24, 1962 2 of the warp threads of one or more plies with the weft 3,045,711 TWG-PLE( 0R MULTI-PLY NARRGW WOVEN FABRICS Edwin J. Gibbons, 149 Anthony St., of the other plies, as is conventional and well known in the art. Since in the operation of my invention the different shuttles each pass through their respective warp sheds as East Providence 14, RJ. though a single ply fabric were being woven, there is no Filed Sept. 5, 1958, Ser. No. 759,337 necessity of considering the clockwise or counterclock 1 Claim. (Cl. 139-408) wise motion which takes place in the manufacture of The present invention relates generally to the textile ‘ multi-ply fabrics with a single shuttle. A further feature of my invention is the provision of art, and is more particularly concerned with the provision 10 a series of special catch threads at the outer edges of the of an improved multi-ply narrow woven fabric, and a fabric. These special catch threads may be arranged method of manufacturing same. singly or in pairs and are caused to interlace simultaneous It has heretofore been common practice in the manu facture of multi-ply narrow woven fabrics to utilize only ly and alternately with the weft of the upper ply and the one shuttle. For example, in the conventional construc 15 weft of the lower ply, as well as the wefts of any inter mediate plies that may be present, to form a bound edge tion of a simple two-ply fabric, the usual procedure is as follows. One half of the face ends are raised and the for the fabric. Without these special catch threads, the edges of a multi-ply fabric constructed in accordance single shuttle carrying the weft is passed through the shed thus formed. Then all of the face ends and one half with my invention would be rough and unfinished, in that of the back ends are raised and the shuttle is passed back 20 the weft loops at each edge would be loose and discon nected with respect to each other. With these catch through the shed thus formed. On the third pick the face ends that were raised on the first pick are lowered threads, however, the result is a well integrated multi ply fabric that in both appearance and construction has and the other half of the face ends are raised and the essentially the same characteristics as a conventionally shuttle is 'passed through this shed in the same direction as the movement of the ñrst pick. On the fourth pick, 25 woven multi-ply narrow fabric. Other objects, features and advantages of the invention all of the face ends and the alternate back ends lare raised will become apparent as the description thereof proceeds and the shuttle passes back again, thus completing the when considered in connection with the accompanying cycle. The shuttle may pass through this sequence of sheds in either clockwise or countercloekwise direction illustrative drawings. In the drawings which illustrate the best mode presently with respect to the bulk of the warp threads, depending on 30 contemplated by me for carrying out my invention: various factors. As will -be obvious, the resulting fabric would be a hollow tu-be except for the usual incorporation FIG. 1 is a fragmentary edge view, partly in section, of a two-ply fabric constructed in accordance with my in ot" a series of stitching threads or binders that draw to vention, the complete path of the weft threads being shown gether the top and bottom plies, thus forming the finished 35 in perspective for purposes of illustration, and each dif two-ply narrow woven fabric. ferent weft thread being marked so as to more clearly In the heretofore known construction of three-ply fab rics, the picks are inserted by a single shuttle in one-face identify its path; r one-middle-one-back and reverse order; or one-face-one i FIG. 2 is a View similar to FIG. 1 in which a modified middle-one-face, one-back-one-middle-one-back order, or arrangement of catch threads are illustrated; similar interlacing. Four-ply fabrics are constructed simi 40 ï FIG. 3 is a yiew similar to FIGS. 1 and 2 except that larly, and in the case of both three- and four-ply fabrics a three-ply fabric is illustrated; and FIG. 4 isa similar View illustrating a four-ply fabric. the shuttle may operate in either clockwise or counter Referring now to the drawings, and more particularly clockwise order, or a combination of both. to FIG. 1 thereof, there is shown generally at 10‘ a two A primary object of the instant invention is the provi sion of a multi-ply narrow woven fabric, and a method of 45 ply fabric constructed in accordance with my invention. The upper ply 12 comprises warp threads 162- and weft making same, wherein separate shuttles are operated simul thread 16, while the lower ply 18 comprises warp threads taneously, one for each ply. It has been found that by 20 and weft thread 22. As will be clearly seen, the warp simultaneously operating separate shuttles, such as by threads of each ply are alternately raised and lowered the use of a multi-bank cross-shot loom, the speed of to provide paths through which the weft threads pass. manufacture of the fabric is increased in direct proportion it being noted that the two weft -threads are separate and to the number of plies in the fabric, or, in other words, distinct from each other. It will be seen that the por in direct proportion to the number of shuttles employed. tions of the weft threads 16 'and 22 which extend trans Expressed differently, a two-play fabric, manufactured versely across the fabric are in exact vertical alignment by the use of two simultaneously operating shuttles in ac with each other. In the manufacture of this fabric, it cordance with the instant invention, will be produced ap will be understood that separate shuttles (not shown) are proximately twice as fast as a two-ply fabric manufactured employed for wefts 16 `and 22, and said shuttles are simul by the heretofore described conventional method. Like taneously operated in opposite directions. More spe wise, a three-ply fabric, employing three shuttles, one for cilically, as the shuttle carrying weft 16 is moving from each ply and operating simultaneously, will be produced the »face edge of the fabric yto the back edge, the shuttle at least three times as fast as by the customary method, Y. while four-ply fabric, employing four shuttles, one for each ply and operating simultaneously, will be produced carrying weft 22 is moving «in vertical »alignment there respective shuttle -carrying its self-contained weft supply, as is well known in the art. The movement of the fell of the fabric away from this point causes a loop to be with from the back edge to the face edge. As will be apparent, when the wefts 16 and 22 reach the edge of at least four times as fast as by the customary method. the fabric, their respective shuttles reverse, it being under In my novel and improved method, each ply is woven 65 stood that each shuttle travels in `a reciprocatory path, separately from its own respective warp and with its own the various shuttles interlacing simultaneously with their respective warps, with adjacent shuttles moving in oppo site directions as the fabric is traversed, but in the same automatically formed in the weft at the selvage edge, and since the shuttles are moving in opposite directions, vertical plane. The separately woven multi-plies are then stitched together by binders or by interlacing some or all placed with respect to the looped endsV of the other weft. it will be' seen that the looped ends of one weft are dis 3,045,711 3 It will be understood, of course, that va plurality of warp threads are present across the fabric, the exact number being determined by the width and quality of the fabric. At the outer edges of the fabric, I utilize special catch threads 30 which interlace simultaneously and alternately with the looped ends of the upper and lower weft-s. If these catch threads were not utilized, the edges of the fabric would not be bound, but rather the looped weft ends would be free »and loose, and the separate plies would not be united. If desired, a stuf‘fer warp 32 may be posi- . tioned between the plies. Also, it will be understood Athat binder warps (not shown) may be utilized to stitch the upper and lower plies together between the outer edges of the fabric, as is conventional and well known in By utilizing a multi-bank cross-shot loom, it is a simple matter to employ separate shuttles for each ply in any of the foregoing multi-ply fabrics, it being understood that each shuttle carries its own self-contained weft sup ply, and it «further being understood that adjacent shuttles move in opposite directions. By the use of this novel and improved technique, a multi-ply fabric may be woven in a greatly reduced time, as compared to the conven tional technique wherein a single shuttle is used for a plurality of plies. In fact, by my process the manufac ture of a multi-ply narrow woven `fabric is expedited in direct proportion to the number of plies present, as com pared to the conventional manufacturing techniques. In addition to the saving in time, I find that by utilizing my the art. ` special catch threads at the edges of the fabric to inter In FIG. 2 a two-ply fabric indicated generally at 34 is lace the weft loops, the end product is as well integrated illustrated, it being noted that the construction of this at its edges as a multi-ply narrow fabric made by the fabric is identical to the fabric 10, above described, with conventional methods heretofore known. the exception of the fact that the catch threads arrange While there is shown «and described herein certain ment is slightly diñerent. More specifically, in the em Specific structure embodying the invention, it will be bodiment of FIG. 2 each catch thread 36 does not inter manifest to those skilled in the art that various modifica lace each lower weft loop with the next adjacent upper tions and rearrangements of the parts may be made weft loop, as was the `case in FIG. 1, but rather each lower without departing from the spirit and scope of the under weft loop is interlaced with an upper weft loop which is lying inventive concept and that the same is not limited next to -the most closely adjacent upper weft loop. 25 to the particular forms herein shown and described ex Referring now to FIG. 3, a three-ply fabric 38 is shown cept insofar as indicated by the scope of the appended having an upper ply 40, a middle ply 42 anda lower ply claim. 44. Each ply is constructed in a manner identical to I claim: that described in connection with fabric 10, 'except that A «multi-ply narrow woven fabric, each ply comprising it will now be understood that the shuttles carrying the 30 warp threads and a weft thread interwoven thereacross, upper and lower wefts move in the same direction, while the weft thread of each ply being separate and independ the middle shuttle moves in a direction opposite thereto. ent from the weft thread of each other ply, each of said Once again catch threads 46 interlace the looped weft weft threads extending from one edge of the fabric to ends at the opposite edges of the fabric, las clearly illus the opposite edge and then back to said one edge through trated. Stuffer warps 48 may be positioned between ad 35 out the fabric so as to form alternate loops at opposite jacent plies, if desired, while the various plies may be edges of ythe fabric, the weft threads of one ply being in vertical alignment with the weft threads of each adjacent binders or by interlacing 4some or all if the warp threads ply, except that the looped ends of a given weft thread of one or more of the plies with the weft of the other are in registry with the intermediate open portion of the 40 adjacent ply, and catch threads at opposite edges of the plies, as is well known in the art. » In FIG. 4a four-ply fabric 50 is shown having an upper fabric interlacing the looped ends of the weft threads to ply 52, an upper middle ply 54, a lower middle ply 56, form the outer edges of the fabric and to connect the and a lower ply 58. Once again separate shuttles are plies to each other at said outer edges. employed for the weft in each ply, it being understood 45 that the shuttles carrying the upper and lower middle References Cited in the ñle of this patent wefts move in the same direction, but in a direction oppo UNITED STATES PATENTS site to the shuttles carrying the upper middle and lower 870,697 Stevenson ___________ __ Nov. 12, 1907 wefts. At the opposite edges of the fabric, catch threads 1,524,398 Kennedy ____________ __ Jan. 20, 1925 di) interlace the weft loops of the four plies, it being noted that in the illustrated arrangement six separate catch stitched together intermediate their edges by suitable warp threads are utilized.