FI57530C - BAERARBAND FOER BLIXTLAOS - Google Patents

Description

ItlfwVI rDi ADVERTISEMENT _ „P _ Λ [B] (11) UTLÄGGN I NGSSKRIFT 5 75 30 0 (45) Patent ey Jr; :: ·: Ill '10 00 1000 ^ (51) Kv.ik.3 / int.ci .3 A 44 B 19/00 ENGLISH —EN N LAN D (21) PwenttliMkemu * - PituntmBkning 221 + 3/72 (22) H * k «fnitptlvl - Aiweknlngtdig 13-08.72 (23) AlkupJUvi - Giltigliuttdag 15-08- 72 (41) Made public - Blhrlt offentllg 19.02-73

Patent and Registration Board (44) Nihaviksip ^ is j. kuL | uik.i «.n p * m. -

Patent · och registrerttyrelsen An * Ökan utlagd och utUkrlftm publkerad 30 * 05.80 (32) (33) (31) Privilege requested —Begird prlorltet l8.08-71 18.08.71, 18.08.71 Japan-Japan (JP) 1 + 6- 627 ^ 6, 1 + 6-627 ^ 7, ^ 6-627 ^ 8 (71) Yoshida Kogyo Kab + ishiki Kaisha, No. 1, Kanda Izumi-cho, Chiyoda-ku,

Tokyo, Japan i -Japan (JP) (72) Tadahiro Yoshida, Fujisawa-shi, Kanagawa-ken, Japan-Japan (jP) (7 * 0 Ruska & Co (5 * 0 Support.strap for zippers - Bärarband för blixtlas This the invention relates to a zipper, and in particular to zippers having two opposite support strips warp-knitted and having rows of interlocking closure members attached to the other longitudinal edge of each support strip.

There are many significant disadvantages in attaching zippers of the type described above to garments and the like. Thus, they have insufficient mechanical strength and poorer dimensional depth compared to zippers with woven support straps. Many attempts have been made to eliminate said drawbacks, for example by using different knitting yarns or by fitting warp yarns inside the knit between the rows of knits. However, none of these attempts have been successful. The use of two or three different yarns has not solved the problem that the support strip stretches in both the longitudinal and transverse directions and that the position of the closure members relative to the support strips is unstable. By arranging the warp yarns between the rows of loops, it has not been possible to avoid the disadvantage that the grooves between the adjacent rows of loops are limited in width and are not wide enough for more than one or two warp yarns. In this case, it is difficult to orient 2,57530 and stably align the sewing needle with such narrow grooves and prevent the sewing stitches from moving transversely between the rows of loops, with the result that the closure members move out of their correct position.

The support strip according to the invention is mainly characterized in that a row of sewing stitches for fixing the closure members to the second longitudinal edge of the support strip passes through a filled groove closest to the longitudinal edge.

The first object of the present invention is to eliminate the above-mentioned drawbacks and to provide a zipper with a sliding slide with two warp-knitted support strips having mechanical strength and dimensional stability comparable to woven fabrics, in particular at the longitudinal edge of the support strip to which the closure members are attached. Thanks to such a structure, it is achieved that the closure members remain in the correct position relative to the support straps when opening and closing the zipper.

Another object of the invention is to provide an improved knitted zipper with a sliding slide with two warp-knitted support strips, whereby the sewing needle can run correctly along the grooves between the rows of loops to secure the closure members in the correct position with respect to the support straps. , which achieves a very good stability of the zipper closure members relative to the support straps.

The invention will become more apparent from the following detailed description and the accompanying drawings, which illustrate some preferred embodiments of the invention and in which Figure 1 shows an enlarged plan view of a part of a zipper according to the present invention, Figure 2 shows the same section, Figure 3 shows a zipper according to another embodiment , Figure 4 shows a section of the zipper of Figure 3, Figure 5 shows a top view and in the same way as Figure 1 of a zipper according to a third embodiment of the invention, and Figure 3 57530 shows a section of the zipper of Figure 5.

The zipper according to the invention comprises two opposing, warp-knitted support straps, rows of fastening members therein and interlocking fastening members. Further, the zipper comprises rows of loops formed by warp loops and weft yarns in each support strip, between which there are grooves having a width greater than the width of said rows of loops. In this case, the reinforcing warp yarns are adapted to fill said gaps between the rows of loops so that the sewing stitches attach the closure members to the support strips and pass through these grooves at the longitudinal edges.

Figures 1 and 2 show a zipper according to a first embodiment of the invention, with two opposing support straps T, Τ '. A row of interlocking closure members E is mounted on each support strip. More specifically, the support strips T ja Τ 'are a warp knit consisting essentially of rows of loops W consisting of warp loops and weft yarns 10. Between these rows of loops there are longitudinal grooves 11. It is important that the width y is greater than the width y 'of the rows of loops at least at the inner longitudinal edges of the support strips T, Τ' to which the closure members E are attached. These grooves 11 have a plurality of warp yarns 12 which cover the bottoms of the grooves and at the same time substantially fill the gaps as shown in Figure 1. Such an arrangement provides reinforcement, in particular at the inner edge of each support strip defined by the first row of loops and the second row of loops W2. Without the presence of these warp yarns 12, the edge portions would be mechanically weak. As shown, the interlocking closure members E are attached to the inner edge of the support strip T by sewing stitches S running between the branches Ea of the closure members E and the innermost groove 11, through the stiffening core 13 and through the innermost groove and extending the entire length of the support strip T. Specifically, the groove 11 is wider than the adjacent rows of loops and W2. This advantageously ensures that the sewing needle (not shown) remains and is guided in the longitudinal groove 11 without the needle getting into the row of loops or W2. In this way, the closure members E are fixed in the correct position on the support strip T. It is also advantageous that the warp threads 12, which are close to each other in the groove 11, hold the sewing stitches S firmly in place. This provides the correct position and position of the closure members E, so that the slide 30 shown in Fig. * 1 can be moved back and forth without the transverse forces tending to pull the zipper halves apart.

Although the above-mentioned embodiment provides good dimensional stability of the support strips T, especially in the warp direction, which is very important, the second embodiment shown in Figures 3 and 4 more reliably guarantees the dimensional stability of the support strip in both the warp and weft directions. The zipper shown in Figs. The reinforced edge 15 has more warp yarns and 12 and weft yarns 10a than the other part 16 of the support strip T, whereby at least said edge 15 of the support strip T retains its dimensional stability in both longitudinal and transverse directions. due to the high stress caused by the slider 30 or due to transverse forces tending to pull the zipper halves apart.

The embodiment of the zipper of the present invention shown in Figures 5 and 6 is intended to provide an even stronger, reinforced longitudinal edge 20 with a plurality of reinforcing warp yarns 12a that are thicker than the thickness of the warp yarns 12 of the other portions 16 of the support strip. In this structure, the reinforced edge 20 of the support strip T has a groove 11 almost at the level of the first and second row of loops W1, W2, forming a structure resembling a woven fabric so that the mechanical strength and dimensional depth of this structure is comparable to the woven fabric. In this case, the closure members E fastened as described above are securely held in place on the thickened reinforced edge 20, without moving due to the high stress caused by the slider 30. To further stabilize the position of the closure members E, the inner groove 11 in the reinforced edge 20 is wider than the other grooves of the support strip T, as in the second embodiment described above.

Of course, the invention is not limited to the application examples presented above, but can vary considerably within the scope of the claims.