FI59197C - DRAGKEDJA - Google Patents

Description

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Ma lj u; UTLÄGGNINGSSKRIFT 1 “'(45) Patent meddelat (5Ί) KY.ik.Wci.3 A 44 B 19/34 SUOMI-FINLAND <*) Patent haktmut - Patentanaökninf 2307/72 (22) HakemltpilYl - Anaöknlnpdaf 18.0 8.72' * (23) ) AlkupUv »—Glltl * h # t» daj 18.08.72 (41) Tullut julkls «lul —Bllvit offantilg 21 02 73

Patent · 1 · Register-held .... .........

_ \. (Λ4) Date of NlhOvIkalpanon | a kuLLJutkalaun. -

Patent * och ragietaratyraltan Amdkan utisgd och utUkrKten pubikand 31.03.81 (32) (33) (31) Privilege requested — Begird prtortm 20.08.71 Japan i-Japan (JP) 1 * 6-75197 (71) Yoshida Kogyo Kabushiki Kaisha, No . 1, Kanda Izumi-cho, Chiyoda-ku,

Tokyo, Japan-Japan (JP) (72) Kiichi Yoshikawa, 0saka-fu, Japan-Japan (jP). (7 * 0 Leitzinger Oy (5l *) Zipper - Dragkedja

The invention relates to a zipper comprising two opposite fastening straps, rows of coupling elements fastened to the opposite edges of these straps, members which protectively cover most of the outer surface of each coupling member in a row, and stitches securing the cover members together with a row of coupling members.

In practice, it is common to use cover members that protect the plastic coupling elements from deforming or otherwise being damaged when the zipper is ironed or washed. One known way is to use jewelry stitches so that they cover most of the connecting element. Another common practice is to line a narrow, elongate and flat seam strip over the coating surfaces of the coupling elements and sew it together with the elements to the stiffening strip. Since such a cover strip has a uniform thickness along its entire width, it tends to form an uneven surface with an outline when sewn onto the zipper strip. In other words, those parts of the cover strip which come into contact with the sewing threads become grooved under the effect of the sewing pressure, while the opposite, longitudinal side edges of the cover strip are inverted or curved upwards. These curved edge portions of the cover strip 2 59197 come into contact with the inner walls of the skate and make this movement heavy and rigid. When the zipper is repeatedly opened and closed by means of a slider in such a sticking arrangement, the cover strip deteriorates on its surface and is damaged when forcibly contacted with the slider. Sometimes stitch stitches even break.

It is an object of the present invention to provide a zipper having cover members for protecting the zipper from mechanical deformation of their coupling elements when ironed or washed so that the above-mentioned disadvantages do not occur.

To achieve this object, the zipper according to the invention is characterized in that the cover member consists of a strip of warp knit fabric with alternating embossing and grooves of the warp stitches and weft yarns arranged transversely to connect the embossing, and that the stitching stitches are arranged in the grooves.

The advantage of this solution is based on the fact that the stitches for attaching the cover strip and the coupling members to the zipper fastening strip are located in the grooves of the cover strip without affecting the embossing grooves, the upper surfaces of which remain free and flat, avoiding friction and tack between the inner surface and the cover strip. In addition to making the zipper easier and lighter to use, damage to the fastening seams is avoided, which prolongs the life of the zipper.

In the following, the invention will be described in more detail with reference to the accompanying drawings, in which FIG. 1 is a cross-sectional view of a zipper according to the invention, in which its two rows of coupling elements in opposite fastening strips are connected to each other by means of a slider.

Figures 2, 3 and 4 are cross-sectional views showing the cover strips used according to the invention, respectively.

Figures 5-8 show the cover strips according to the invention in schematic plan views.

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The drawings, and in particular Figure 1 thereof, show a zipper 10 comprising a pair of opposite fastening straps 11 and rows of coupling elements E mounted thereon, which can be connected together by means of a slider 12. The coupling elements E are formed from a continuous plastic fibers in a meandering shape such that they can be installed in accordance with each attachment strip 11 of the inner longitudinal side of the two täisreunan 13 of Figure 1. According to the invention, elongate cover members are provided to cover most of the outer surface of the element E in order to protect them. The cover members comprise a narrow ribbon fabric 15 having a warp structure and substantially comprising embossed yarns 16 formed by warp yarns and weft yarns 17 arranged transversely to meander the embossed beverages 16. A typical example of this warp ribbon ribbon structure 15 is shown in Figure 5 with a knitted or elastic provided. sutures 18 connected between adjacent beverages 16. Grooves 19 are formed between adjacent beverages 16 with a sparse tissue structure.

According to the invention, these grooves 19 are used to receive sewing threads S from a sewing needle (not shown) which is precisely guided in the grooves 19.

In the numerous embodiments shown, the cover strips 15 are provided with two grooves 19 delimited by relatively wide edge fluxes 16a and a relatively narrow middle beverage 16b. The edge drinks 16a formed from the longitudinal weft of the strip 15 are formed of thicker yarns than other yarns of the structure or of double yarns so that the weft 20 is reinforced, which weft would otherwise be thin and weak because it has one loop less weft yarn 17 than the middle part of the ribbon 15.

According to Fig. 1, the cover strip 15 is arranged symmetrically to each of the two upper and lower backs Ea, each helical element E and fastened together with it to the fastening strip 11 by sewing stitches S fitted in the grooves 19 of the strip 15 without sewing pressure from element E, but they remain flat and smooth with the plane of element E. In this way, when the sewing threads S are embedded in the grooves 19, they are not subjected to wear due to abrasion, which would otherwise occur due to the frictional contact of the slider 12.

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In the embodiment of Fig. 2, the cover strip 15 of Fig. 7 is used, which has the same structure as the strip of Fig. 5, except that the additional weft yarn 17 'is arranged to connect the two strips 15 of Fig. 5 in pairs in their respective inner grooves 20a. This arrangement advantageously facilitates the simultaneous placement of two similar strips 15 on the upper and lower backs Ea of the elements E with their connecting ends Eb extending outwards through the loops of the connecting weft yarn 17 '.

In the embodiment shown in Fig. 3, a coupling element E in the form of a helical spring is shown, which is mounted on and along the inner longitudinal edge of the fastening strip 11. This ribbon 11 has a warp knitting structure similar to the ribbon 15 shown in Fig. 5 and is provided with alternating beverages, i.e. protrusions and grooves, for the purpose described above. Reference numeral 21 denotes a reinforcing inner member arranged through the helices of the elements in the manner normally used in this type of element.

In the embodiment of Figure 4, it is essential to use a cover strip 15 comprising two identical pieces bent backwards so that the strip 15 has a series of protrusions 16 and grooves 19 on the upper surface to receive sewing threads S and another set of similar protrusions and grooves symmetrically on the lower surface. The helical element E is provided in its lower back part Ea with alternating protrusions 22 and grooves 23 which closely fit the corresponding grooves 19 and protrusions 16 in the lower surface of the strip 15. This arrangement gives a greater retention of the strip 15 relative to the element E when sewn to the fastening strip 11.

Figure 8 shows a wide warp knitting fabric 24 comprising a plurality of strips 15 connected alternately by water-soluble plastic hooks 25, the arrangement being such that the fabric 24 can be immediately separated into private cover strips 15 when immersed in water.

It is to be understood that various other embodiments and variations of the invention are possible within the scope of the appended claims. For example, the knitted loops 18 in the strip 15 of Figure 5 may be replaced by warp yarns 26 interposed between the protrusions 16 as shown in Figure 6.