Textiles: weaving – Fabrics – Special shape
Reexamination Certificate
2000-03-22
2002-07-16
Falik, Andy (Department: 3765)
Textiles: weaving
Fabrics
Special shape
C024S392000
Reexamination Certificate
active
06418975
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a woven slide fastener stringer bound on a fastener tape by weaving a continuous element row of synthetic resin monofilament into the fastener tape woven at the same time, along one longitudinal edge thereof.
2. Description of the Related Art
According to a well known woven slide fastener stringer of this kind, as disclosed in, for example, Japanese Patent Publication No. 2-17162, element rows constituted of a plurality of coil-like parallel coupling element portions of synthetic resin monofilament are bound on a fastener tape woven at the same time along one longitudinal edge of the same tape with binding warp yarns and foundation weft yarns.
Each of the coupling element portions comprises a coupling head protruded outward from the longitudinal edge of the fastener tape, upper and lower leg portions extending in parallel inward of the same tape, and a connecting portion for connecting upper and lower leg portions of adjacent coupling element portions. In the slide fastener stringer disclosed in the same publication, foundation weft yarns composed of two-folded yarns by double picks are disposed below the aforementioned lower leg portion of each coupling element portion. That is, every time the weft yarn is inserted, a single coupling element portion is woven in with the same weft yarn.
As shown in
FIG. 3
(representation of the coupling head of the coupling element portion is omitted as required to facilitate illustration in the figure), the Publication discloses that the coupling element portion E is supported by 12 binding warp yarns W
1
to W
12
in total. On the connecting portion side of the coupling element portion E, eight warp yarns W
5
to W
12
are guided by repeating a unit of high-high-medium-low in succession in plan view of the fastener tape. On the coupling head side, four warp yarns W
1
to W
4
are guided by repeating the order of high-medium-low-medium. Here, “high” means that the warp yarn supports the upper and lower leg portions L from above, “medium” means that the warp yarn is disposed between the lower leg portion and a foundation weft yarn w, and “low” means that warp yarn support the foundation weft yarn w and the upper and lower leg portions L from below. Meanwhile, in
FIG. 3
, representation of the coupling head of the coupling element portion is omitted as requried to facilitate illustration.
Such a weaving structure not only stabilizes a pitch between adjacent coupling element portions but also intensifies the density of the warp yarns constituting a warp yarn pocket without providing a particularly high tension. As a result, the pitch between the coupling element portions is stabilized so that an excellent plasticity and flexibility of the fastener tape can be secured. Thus, the slide fastener can be sewn to an attachment material such as clothes or a bag at a high speed.
However, with respect to the slide fastener stringer disclosed in the above publication, particularly to a manner of mingling of the binding warp yarns with respect to the foundation weft yarn for fixing the parallel coupling element portions, each of the fixing warp yarns is guided by repeating the unit of high-high-medium-low or the unit of high-medium-low-medium as described above. Thus, in either case with respect to the foundation weft yarn w, as shown in
FIG. 3
, the binding warp yarn runs over three weft yarns w composed of two-folder yarns and then runs below the weft yarn w of next position, and this sequence is repeated.
Usually, upon manufacturing a finally finished slide fastener, with the coupling element row bound on a longitudinal edge of each of two slide fastener stringers engaging each other, a desired number of the coupling element portions are cut out at an interval corresponding to the length of a slide fastener in the longitudinal direction thereof so as to form a so-called space portion to complete the fastener chain. When the coupling element portion is cut out, the coupling head is cut out by cutting a border between the coupling head and the upper and lower leg portions, and after that, the upper and lower leg portions of each coupling element portion is pulled out from a warp yarn pocket. Therefore, when the space portion is formed, the binding warp yarn supporting each coupling element portion from above or below floats, i.e., moves easily in the upward and downward directions, in a region in which the space portion is formed.
On the other hand, since a process for attaching top and bottom end stops, a process for installing the slider and the like are provided after the formation of the space portion for manufacturing the slide fastener, if the binding warp yarn floats too largely, i.e., moves easily too far in the upward direction or the downward direction, due to the formation of the space portion, the binding warp yarns hinder subsequent processes, thereby causing various troubles. Further, the fastener chain is cut at the center of the space portion in the longitudinal direction so as to produce a final slide fastener. The binding warp yarn floating in the space portion as describe above leaves the fastener tape while an end thereof is fixed, because it is little supported by the foundation weft yarn. As a result, the commercial value of the produced slide fastener is lowered or additional work is needed for treating that trouble.
In the slide fastener stringer disclosed in the foregoing publication, the binding warp yarn runs over three weft yarns composed of two-folded yarns with respect to the foundation weft yarn and then is guided below the weft yarns of a next position. As a result, the binding warp yarn floats over a length corresponding to the three coupling element portions, and therefore, in a process after the space portion is formed, the binding warp yarn may be caught or cut out, or an end portion of the coupling element portion adjacent to an end portion of the space portion may slip out of the fastener tape. These troubles cause faulty products.
SUMMARY OF THE INVENTION
Accordingly, the present invention has been achieved to solve the above-described problems, and therefore, an object of the invention is to provide a woven slide fastener stringer, wherein a pitch between adjacent coupling element portions is stabilized and the warp yarns constituting a warp yarn pocket are woven in a high density so that excellent plasticity and flexibility are secured, attachment thereof to a material can be carried out by sewing at high speed and floating of binding warp yarns can be suppressed after a space portion is formed.
The above object is achieved effectively by the present invention.
According to the invention, there is provided a slide fastener stringer in which a plurality of coupling element portions continuously formed from synthetic resin monofilament are woven in a fastener tape comprising plural foundation weft yarns and warp yarns in succession along a side edge thereof, at the same time when the fastener tape is woven, with plural element binding warp yarns in parallel to each other. The coupling element portion comprises a coupling head protruded outward from a side edge of the fastener tape, upper and lower leg portion extending inward of the tape from both ends of the coupling head and a connecting portion for connecting each end of the upper and lower leg portion with upper and lower leg portions of adjacent coupling element portions. Among the plural element binding warp yarns running in parallel, at least two element binding warp yarns disposed on a side toward the coupling head run over an upper face of the upper and lower leg portions of each of the coupling element portions disposed in parallel along a longitudinal direction of the tape and then run under a foundation weft yarn running in parallel to a coupling element portion of a next position and the coupling element portion, each of the element binding warp yarns being woven in this repeating unit.
With such a structure, even when a desired number of the coupling element port
Falik Andy
Finnegan Henderson Farabow Garrett & Dunner LLP
YKK Corporation
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