PROCEDURE FOR MAKING THE LAST ROW OF A KNITTED ARTICLE RUN-RESISTANT

Description

MATEC Srl, based in Scandicci (Florence) DESCRIPTION The present invention relates to a process for making the last row of a knitted article run-proof. As is well known, knitted products made with traditional knitting or hosiery machines must be stitched or re-stitched at the end of production to prevent the last row of stitches from unraveling, which would also affect the previous rows. The sewing or linking operation, following the production of knitted products, has a considerable impact on the production costs of such products. In some cases, such as when sewing the toe of socks that are worked starting from the edge or cuff of the leg, this stitching is also necessary to complete the product, but, in many cases, the sewing or linking operations have the sole purpose of making the product run-proof. The main aim of the present invention is to solve the above-mentioned problem by creating a process that makes the last row of a knitted article run-proof, thus avoiding the need to proceed with subsequent sewing or linking operations. Within the scope of this task, an object of the invention is to Br. Ing. Guido Modiano, S. Lara ^odian Vera Mcdia;;o, Dr. Ing. Marno Zanoth; Dr. Ing. Vlncciìzcdi Francia, Carla VenturoJi to devise a process that can be performed, in a simple way, with traditional knitting or hosiery machines. Another aim of the invention is to create a process that allows obtaining an article with the terminal area of ​​the knitting performed in an aesthetically acceptable manner. This task, as well as these and other purposes which will become clearer later, are achieved by a process for making the last row of a knitted product warp-proof, characterised by the fact that, in the execution of the last row of the product, the inter-knit portions, or the portions of yarn or yarns which join two adjacent loops of knitting, are made with an increased length forming additional loops alternating with the loops of the last row of knitting. According to a particularly advantageous aspect of the invention, each of the loops of the last row is therefore preferably knitted with an additional adjacent knitting loop. Further characteristics and advantages of the invention will become clearer from the description of a preferred, but not exclusive, embodiment of the method according to the invention, illustrated, by way of example and not by way of limitation, in the attached drawings, in which: Figure 1 illustrates the terminal portion of a knitted product made with the process according to the invention; Figure 2 illustrates the terminal portion of a knitted article made with the process according to the invention and with a further processing phase to strengthen the run-resistance of the last row. .. „ c ;ara Codiano Dr. Eng. Guido Zanotti. ArrediFrarS. Cario Venturoli Dr. IngAlUCCIrZCU. ria of the artifact; Figures 3 to 6 schematically illustrate a possible execution of the process according to the invention on a knitting or hosiery machine equipped with needles and hooks; Figures 7 and 8 illustrate the terminal portion of a knitted product made according to a variant of the process according to the invention, respectively in an intermediate processing phase and at the end of the processing; Figure 9 illustrates the terminal portion of a knitted product made according to a further variant of the method according to the invention. With particular reference to figures 1 and 2, the method according to the invention substantially consists in making the last knitting row 1 of a manufactured article by performing the intermediate knitting portions, i.e. the portions of thread or threads, used in the making of the last knitting row 1, which join two adjacent knitting loops 2, with an increased length in such a way as to form additional loops 2a which alternate with the loops 2 of the last knitting row 1. This increased length can be obtained, for example, when making a tubular product using a circular knitting or hosiery machine with a needle cylinder and dial, using the hooks placed in the dial which, positioned between the needles of the needle cylinder, create a raised support surface for the interstitch portions, as will be better seen later. Appropriately, the penultimate rank of mesh 3, represented in the Lara Mediano far.n Zanetti, Carlo Venturoli Dr. Eng. Guido Mediano, S Ve Mcrt· Dr. Ing. Dr. Vincenzo di Francia, figure with a solid black line, is made with one or more elastic yarns that are pre-tensioned during feeding to the machine so that, at the end of the processing, the penultimate knitting row 3 tightens the loops 2 and the additional loops 2a of the last row 1, effectively preventing slippage of the yarn or yarns that make up the last row 1 even in the presence of a pull applied to that yarn. A similar effect can be achieved by knitting the penultimate row of stitch 3 with loops that are shorter than the loops of the last row of stitches. This effect is easily achieved by varying the stitch density, in a known manner, using devices normally found on known knitting or hosiery machines. Advantageously, to further increase the run-resistance of the last row 1 of the product, each of the loops 2 of the last row is knitted with an additional adjacent loop 2a, as illustrated in particular in figure 2. In this way, a sort of knotting of the additional bushings 2a with the bushings 2 is obtained which safely excludes any possibility of slipping and therefore of unravelling of the bushings of the last row 1. Figures 3 to 6 illustrate, for purely indicative but not limitative purposes, the operational sequence in carrying out the process according to the invention on a circular knitting or hosiery machine equipped with needles 10 carried by the needle cylinder and hooks 11. Dr. Ing. Guido S. lifa Mediano True Media I. Dr: Eng. N-™ Dr. Ing. Vincenzo di Francia, Carlo Venturoll carried by the plate that faces above the needle cylinder. As illustrated in figure 3, the thread 12 for the creation of the last row 1 is deposited on the tip 11a of the hooks 11 each positioned between two adjacent needles 10. The thread 12 is taken by the needles 10 which form the loops 2 by knocking down the loops of the penultimate row 3, as illustrated in figure 3. At this point the product can be unloaded from the machine by disengaging the needles 10 and the hooks 11 respectively from the bushings 2 and from the additional bushings 2a, obtaining a product of the type illustrated in figure 1. Advantageously, as already mentioned, the bushings 2 can be knitted with the additional bushings 2a to further increase the resistance against de-meshing. This is done, as illustrated in particular in figure 4, by offsetting the plate relative to the needle cylinder in such a way as to bring each hook 11 into correspondence with each needle 10. Preferably, the hooks 11 are equipped with a double body, i.e. made up of two mutually adjacent plates which define between them, in an area of ​​the longitudinal development of the hook 11, a seat 11b which can be passed through by a needle 10. After the offset that brings the hooks 11 into correspondence with the needles 10, the hooks 11 are translated longitudinally in such a way as to bring the seats 11b into alignment with the needles 10 below. At this point, as illustrated in figure 5, the needles 10 are Dr. mg. Guido Vere k'O'· . cario Venturo!I pr.lng. Vincenzo din-ancia, G raised until their tip passes through the seat 11b. Subsequently, the hooks 11 are moved again relative to the needles 10 in such a way as to cause the needles 10 to come out in the direction of the tip 11a of the hooks 11 with consequent hooking, by the tip of the needles, of the additional loops 2a held on the tip 11a of the hooks. The additional loops 2a, once hooked by the tip of the needles 10, are drawn, as illustrated in figure 6, through the loops 2, which are thus knitted with the additional loops 2a. The product is then unloaded from the needles 10. In this way, the product illustrated in figure 2 is obtained. Alternatively, as illustrated in figures 7 and 8, the last row of stitches, indicated in these figures with the reference number 1a, can be made by knitting first loops 22 with a first group of needles alternating with second loops 23 made with a second group of needles, alternating with the needles of the first group of needles, and by making portions of intermediate stitches 22a, between the loops 22, and portions of intermediate stitches 23a, between the loops 23. Also in this case the portions of intermediate stitches 22a and 23a are made with an increased length so as to constitute additional loops. Suitably, the first bushings 22 are then knitted with the first additional bushings 22a, while the second bushings 23 are then knitted with the second additional bushings 23a, obtaining an article as illustrated in figure 8. Figure 7 illustrates how the por „( ara'odian • ,.j Z nights, can be obtained Carlo Venturo» intermediate rows 22a and 23a, having an increased length, placing the thread or threads used to create the last row on the points 11a of the hooks. In this case, the last rank 1a of the manufactured article can be formed, for example, by supplying a thread, at one machine feed, to the needles of the first needle group and then supplying the same thread, at the next revolution of the needle cylinder around its axis, to the second needle group. The interweaving of the loops 22 and 23 with the additional loops 22a and 23a can be performed on a circular knitting or hosiery machine with cylinder and dial, in a manner similar to that described with reference to figures 3 to 6, by staggering the dial of the machine relative to the needle cylinder in such a way as to bring the hooks in correspondence with the needles that take up the additional loops formed by the inter-knit portions 22a and 23a, carrying them through the loops 22 and 23 which are discharged by the needles. In the execution variant illustrated in figure 9, the last knitting row, indicated with the reference number 1b, is made with two threads: a first thread 24, preferably elastic, and a second thread 25. In this case, the additional loops 26a are made only with the second thread 25 and the loops 26 of the last row, formed by the first thread 24 and the second thread 25, are knitted with the additional loops 26 made with the second thread 25. The operating procedure for the execution of this execution variant is similar to that described with reference to figures 3 to 6 with the difference that on the tips 11a of., Lara Mediano Dr. In«. Guido Canotti. Veri Mediano. Or. ·pJoventuroH Or. ina. Vincenzo di Fra.xa only the second thread 25 is supported on the hooks 11. The product obtained with the process according to the invention has an excellent degree of finishing even in correspondence with the last mesh row 1, 1a, 1b which is fully acceptable from an aesthetic point of view. Thanks to the fact that the intermediate stitch portions of the last row have an increased length forming additional loops 2a, 22a, 23a, 26a and to the fact that the stitch loops 2, 22, 23, 26 of the last row are preferably knitted with the additional stitch loops 2a, 22a, 23a, 26a, a high resistance to unravelling is obtained, not only accidentally, but also in the presence of a sufficiently high tension applied to the yarn or yarns that make up this last row of stitches. It should be noted that the process according to the invention has been specifically designed to allow the production of stockings on single-cylinder circular hosiery machines using known processes, starting from the toe of the stocking rather than from the edge or cuff. These operations, with traditional techniques, necessarily leave the last row of stitch formed, corresponding to the upper end of the leg of the stocking, to be subjected to a subsequent sewing or linking operation to prevent it from unravelling. In practice, it has been found that the process according to the invention fully fulfills the intended purpose, since it allows the production of knitted articles with the last row presenting a high resistance against unravelling, thus avoiding the need to have to underS. tara Mediano Br. Inf. Gwdo t-.- Zanniti,VP':^'7^ France. Cario Venturo!. subject the product to subsequent sewing or linking operations with consequent savings in production costs. The process thus conceived is susceptible to numerous modifications and variations, all of which fall within the scope of the inventive concept; furthermore, all the details may be replaced with other technically equivalent elements. In practice, the materials used, provided they are compatible with the specific use, as well as the dimensions, may be any according to the needs and the state of the art. Dr. In<. Guido Modano, S. Vara Mediano Vera Mediana, Dr. Eng. Nemo Zanniti, Dr. Fng. Vincenzo di Francia, Carlo Venturoll

Claims

CLAIMS 1. Process for making the last row of a knitted article run-proof, characterised in that, in the execution of the last row of the article, the inter-knit portions, i.e. the portions of yarn or yarns that join two adjacent loops of knitting, are made with an increased length forming additional loops alternating with the loops of the last row of knitting.

2. Method, according to claim 1, characterised in that each of the loops of said last row is knitted with an additional adjacent mesh loop.

3. Method, according to claim 1, characterised in that the penultimate row of stitches is made with loops having a length shorter than the length of the loops of said last row of stitches.

4. Process, according to claim 1, characterised in that the penultimate knitting row is made with one or more pre-tensioned elastic yarns.

5. Method, according to one or more of the preceding claims, characterized in that said last row of knitting is made by forming first loops by means of a first group of needles alternating with second loops formed with a second group of needles, alternating with the needles of said first group of needles, and in that said first loops are knitted with first additional loops, constituting the portions of inter-knitting connecting said first loops to each other, while said second loops are knitted with second additional loops constituting the portions of inter-knitting connecting said second loops to each other.

6. Method, according to one or more of the preceding claims, characterised in that said last row is made with two threads: a first thread and a second thread, and said additional loops are made only with said second thread and in that the loops of said last row, formed by said first and said second thread, are knitted with said additional loops made with said second thread.

7. Method, according to one or more of the preceding claims, characterised in that said first thread is constituted by an elastic thread.

8. Knitted product, characterised by the fact that, in the last knitted row of the product, the intermediate stitch portions, i.e. the portions of yarn or yarns that join two adjacent loops of stitch, have an increased length and form additional loops alternating with the loops of the last knitted row.

9. Knitted article, according to claim 8, characterised in that each of the loops of said last row is knitted with an additional contiguous loop.

11. Knitted article according to one or more of the preceding claims, characterised in that the penultimate row of stitches has loops having a length shorter than the length of the loops of said last row of stitches.

12. Knitted article according to one or more of the preceding claims, characterized in that the penultimate row of stitches is made of one or more pre-tensioned elastic yarns. Dear Venturo!! 13. Knitted article according to one or more of the preceding claims, characterised in that said last row of stitches is made with first loops knitted by a first group of needles alternating with second loops formed with a second group of needles, alternating with the needles of said first group of needles, and in that said first loops are knitted with first additional loops, constituting the intermediate knit portions connecting said first loops to each other, while said second loops are knitted with second additional loops constituting the intermediate knit portions connecting said second loops to each other.

14. Product according to one or more of the preceding claims, characterised by the fact that said last row is made with two threads: a first thread and a second thread, by the fact that said additional loops are made only with said second thread and by the fact that the loops of said last row, formed by said first and said second thread, are knitted with said additional loops made with said second thread.

15. Product according to one or more of the preceding claims, characterised in that said first thread is made of an elastic thread.

16. Process for making the last row of a knitted article warp-proof and article obtained with the process, characterised by the fact that they include one or more of the characteristics described and / or illustrated. É»r. Ina. Guido Mediano, S. Lara Modlano Vera Modlano. Dr. Ing. Nemo Zanotti, Lr. Ing. Vincenzo di Francia, Carlo Venturoll (Onober essi) MODÌANO & ASSOCIATI Srl 40126 Bologna - Via Irnerio, ig / g UFFICIO wroVINCftlflRDUSTM* COMMERCIO E ZpIGl / NATO JiL