US2113242A - Method of producing nonravel knitted fabric - Google Patents

Description

A ril 5, 1938.

INVENTOR: Osicar Sax/m1",

April 5, 1938.

0 72a?" Stine]; I EYS. 5

METHDD F PRODUCING NONRAVEL KNKT- TED FRIC Oskar Sauer, Philadelphia, Pa.

Application March 1, 1936, Serial No. 66,984

2 Claims. (Cl. 6696) This invention relates to non-ravel knitted the production of my improved fabric on a flat fabrics, as well as to methods of producing such knitting machine of the Cotton t e. fabrics. Figs. IIIXIII are fragmentar3 cross sectional My invention is directed in part toward the views of such a machine illustrating various 5 provision of a knitted fabric having the charac-' steps in the knitting cycle by which'my fabric is 5 teristics of plain knitted fabrics as regards produced. smoothness, appearance and elasticity, but which As delineated diagrammatically in Fig. I, my will resist running in the event that the yarn is improved non-ravel knitted fabric comprises ruptured at any point therein; and which is courses C each having normal loops N in spaced moreover susceptible of production in sheer wales W W whereof the shanks are embraced l0 weights for hosiery and the like. by anchorage loops A of an adjacent course C Another object of my invention is to provide and anchorage loops A in intervening wales W, a simple method whereby a non-ravel fabric W embracing the shanks of normal loops N of having the above characteristics can be readily said respectively adjacent courses C In the ilproduced, particularly on fiat knitting machines lustrated instance, it will be observed that the 15 of the Cotton type with lace bar attachments, courses C and C are contiguous and consistently such as are ordinarily used in the production of alternate throughout the fabric, and that the full fashioned hosiery and the like. normal loops N 'of the courses C and the an- I am aware that non-ravel fabrics have been chorage loops A of the courses C lie in alternate produced heretofore on knitting machines of the wales W W while the normal loops N of the type referred to by lateral transfer of predetercourses C and the anchorage-loops A of the 20 mined loops-between wales, but this not only recourses C lie in intermediate alternate wales sulted in distortion of the fabrics, but detracted W W. The fabric thus consists of repeats of greatly from their elasticity, so that they were the courses C and C in regular succession vA not altogether satisfactory for stockings and the fabric of the described construction will obviously 25 like. The above'mentioned drawbacks are ab-. resist running by virtue of the binding action of sent in my improved fabric, wherein as hereinthe anchorage loops A it upon the normal loops after more fully explained, the shanks of normal N N in alternate courses and wales. In other loops in one course of the knitting occupy alterwords, a run originating in one course cannot nate wales of the fabric and are embraced by spread to adjacent courses since such adjacent i anchorage loops of the first mentioned course. The fabric is moreover smooth, of single thickanchorage loops of an adjacent course in intercourses are formed from different lengths of the mediate wales; and wherein the shanks of norya.m,and furthermore since alternating courses mal loops of another course occupying the inter- I are interengaged only by the anchorage loops mediate wales of the fabric are embraced by with the shanks of normal loops of other courses. I

5 Also, as hereinafter more fully disclosed, my ne'ss as distinguished from rib fabric, undistorted,

improved fabric is producible by forming the ancomparable in elasticity with plain fabric, and chorage loops in alternate wales during the knitmoreover susceptible of production in sheer ting of one course and releasing them over held weights for hosiery and the like.

40 normal loops of a previouslyfo'rmed course in One way in which the fabric can be readily 0' the same wales, while concurrently forming norproduced on. a flat knitting machine is shown in mal "loops inintermediate wales of the fabric; Figs. III to XIII, the machine having special then during knitting of a second course, forming needles- Ill, Illa with centrally-kinked barbs or anchorage loops in the intermediate wales and beards ll, special knock-overs l2 with loop-dereleasing them over held normal loops of the taining notches l3, and a lace bar having half 45 first mentioned course while forming normal loops as many presser points 15 as there are needles, of said second course in the alternate wales of with said points spaced by an interval double the fabric; and by continuously repeating this that of the needle spacing as shown in Fig. 11. cycle. As shown for example in Fig. IV, the closing of In the drawings, Fig. I is a diagrammatic the beard H of a needle l0 willresult in the 50' view showing the texture of my improved non-, formation of two vertically-spaced eyes for a ravel knitted fabric. purpose which will be readily understood from Fig. II is a diagrammatic perspective view' further description. The sinkers indicated at I6 showing an arrangement of spring beard neein Figs. IIIX[II are arranged to slide as usual dies and cooperating presser points suitable to. in transverse grooves of a sinker head I! which '55 provides the ledge I8 for closing the needle beards II in the well known manner.

In Fig. III, the needle I0 and the cooperating point I5 are fully elevated and the sinker I6 fully retracted while the yarn Y is being laid for a course 0*. In Fig. IV, the sinker I6 is advanced, the needle I6 descending with its beard I I closed by the point I5, and with a new loop A engaged in the lower eye of said needle and beingdrawn down through a previously formed normal loop N of a course C in a wale W said loop N being supported at this time by a shorter nib of the knock-over I2. In Fig. V, the sinker I6 is retracted, the needle I0 and the point I5 lowered, with the newly-drawn anchorage loop A at the level of the notch I3 of said knock-over. In Fig.

, VI, the knock-over I2 and the sinker I6 have point I5 penetrating the loop A.

been advanced to hold down the loops A andN while the needle I0 and the point I5 are rising,

the loop A being detained in the notch I3 of said knock over, and the loop N being detained by the sinker. In Fig. VII, the needle III and the point I5 are again descending, with the loop N engaged in the lower eye of said needle while the needle beard II is closed over said loop, and with the In Fig. VIII,

' theneedle I0 is fully lowered with the point I5 separated laterally therefrom, and with the loop N in the upper eye of said needle, knock-over I2 being at this time retracted, but the sinker I6 being still in advanced position. In Fig. IX, the point I5 is rising alone and about to release the loop A for casting of the same over the top of the needle III, said needle, the knock-over I2, and the sinker I6 remaining substantially in the same positions whichthey occupied in Fig. VIII. In Fig. X the point I5 is still rising after having cast the loop A, and the needle III about to fol low with the loop N engaged in its upper eye. While the above events are transpiring in the formation and release of anchorage loops A of a course C in the wales W of the fabric, each of the needles Illa draws a single normal loop N in a. wale W in the manner shown in Figs; XI, XII and IHII. In Fig. XI, the needle Illa is fully elevated to take the yarn Y, the knock-over I2 being advanced and the sinker I6 retracted as in Fig. III. In Fig. XII the needle I M is descending with the new loop N of the yarn Y within its upper eye, its beard being held closed in the usual way through contact with the presser ledge I8. In Fig. XIII, the needle I Ila is shown lowered after havingcast the old loop and is holding a nowcompleted new normal loop N.

After the knitting of a course C in the manner just explained, the point bar of the machine is shifted laterally to the position shown in dot and dash lines in Fig. III so that in the formation of a contiguous course C the points I5 will cooperate with the intermediate needles IIIa precisely as they cooperated with the needles I 0 in the formation and casting of anchorage loops A in the wales W while the needles III at the same time form normal loops N of such course C in the wales W At the completion of the course C the point bar is shifted laterally back to its original position in readiness for the knitting of another course C. This completes a knitting cycle which is continuously repeated throughout the knitting of the fabric.

Any suitable means may be employed for actuating the'needles, the presser points, knock-overs normal loops respectively at the different levels while the needles are being elevated to clear the beards of the alternate needles above the corresponding previously formed normal loops at the higher level; then'again depressing the needles and incidentally closing the'beards of the alternate needles over the previously formed loops on them to draw said loops down through the anchorage loops at the lower level and permitting casting of the latter loops over said alternate needles; then elevating the needles to take new thread; then forming from newly laid thread normal fabric loops on said alternate needles while anchorage loops are formed on the other needles in the same manner as aforesaid.

2. The method of producing non-rave] fabric on a fiat knitting machine having needles with medially kinked spring beards which upon being closed provide vertically spaced eyes, cooperating sinkers, cooperating knock-overs with lateral loop detaining notches between the fabric supporting ledges and over-reaching nibs, a stationary beard .pressing ledge, and a bar with a beard presser point at every other. needle, by successive repetitions of a cycle which comprises forming loops around the shanks of the needles by advance of the sinkers upon newly laid thread; then depressing the needles so that the ends of the beards of alternate needles pass over the new loops and closing the beards of such needles by means of the presser points so that the newly engaged loops on them are confined to the lower eyes of said needles while being drawn through previously formed normal loops detained by the points on the nibs of the knock-overs and down to the level of the notches in the latter; then advancing the knock-overs for detainment within their notches 0fthe newly formed loops on the alternate needles and at the same time advancing the sinkers over the previously formed'loops; then elevating the needles sufiiciently for clearance by the ends of the beards of the alternate needles of the previously formed loops; then again depressing the needles andclosing the beards of the alternate needles over the previously formed loops by means I the normal loops on the alternate needles; then elevating the needles to take new thread and shifting the presser bar to bring its points over the intervening needles in readiness to cooperate with them; then forming from the newly laid J thread normal fabric loopson the aforesaid alternate needles in the usual way incident to which the beards of said alternate needles are closed by contact with the stationary presser ledge, while anchorage loops are formed on' the remaining needles in the same manner-as aforesaid.

' OSKAR SAUER.

Images