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AssigneeYKK Corporation
InventorsToshio Aoki, Kunio Miyazaki, Manami Oono
Estimating the term…
In a Y bar for forming coupling elements, an opening angle of a pair of right and left leg parts is narrower than that of the ordinary ones. Plural bent portions, which are bent inward, are formed successively in an extending direction of the leg parts in a range from a crotch part toward pawl parts at front ends of the leg parts. The gap between the pawl parts are narrowed gradually from proximal ends to front ends thereof. Bulging portions are provided on outer side surfaces of the crotch part. Thus, the stabilization of the posture of a metallic coupling element, which is obtained by cutting the Y bar, at the time of mounting, strength of the coupling element and stabilization of the mounting posture of the coupling element to the fastener tape can be improved.
A metal wire rod for forming slide fastener coupling elements, having a substantially Y-shaped section, which has a head part and a pair of leg parts extending from the head part through a crotch part, wherein three or more bent portions, which are bent inward, are formed successively in an extending direction of the leg parts on an inner face from the crotch part to a pawl part at a front end of each of leg parts.
A metal wire rod for forming slide fastener coupling elements, having a substantially Y-shaped section, which has a head part, a pair of leg parts extending from the head part through a crotch part, and pawl parts projected inward from front ends of the leg parts, wherein a gap between inner faces of the pawl parts narrows gradually from proximal end portions of the pawl parts toward front end portions thereof.
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Details: connection of separate, or one-piece, interlocking members to stringer tapes; Reinforcing such connections, e.g. by stitching
Stringers arranged edge-to-edge when fastened , e.g. abutting stringers: with substantially rectangular members having interlocking projections…
Zipper or required component thereof: interlocking surface constructed from plural elements in series
Having mounting portion with specific shape or structure: including embracing jaws
Term end not estimated
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1. Field of the Invention
The present invention relates to a metal wire rod for forming coupling elements, which is usually called a Y bar and is applied to a slide fastener, and a metallic coupling element obtained by slicing the same wire rod.
2. Prior Art
FIG. 1 is a perspective view showing partially a configuration of a typical embodiment of a metal wire rod for forming coupling elements of a slide fastener according to the present invention.
FIG. 2 is a plan view showing a section of the metal wire rod and an external shape of a coupling element obtained from the same wire rod.
FIG. 3 is a partial sectional view showing a mounting state of the coupling element of the present invention on a fastener tape, which is obtained from the metal wire rod.
Hereinafter, typical embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a perspective view of part of the metal wire rod for forming a coupling element of a slide fastener, as taken from its leg side, showing the first embodiment of the present invention. FIG. 2 is a sectional view of the same wire rod as well as a plan view showing an external shape of a coupling element obtained by cutting the same wire rod.
FIGS. 1 and 2 show a metallic wire rod 10, which is a material for forming coupling elements. Usually, the wire rod 10 is not formed by extrusion or drawing, but instead it is formed by multi-stage rolling on a peripheral face of the wire rod having a circular section so as to be deformed into a wire having such a sectional shape as shown in FIG. 1. Like the conventional one, the metal wire rod 10 for forming coupling elements according to this embodiment comprises a head part 11 to be a coupling head 21 after cutting, a pair of right and left leg parts 13 extended from the head part 11 through a crotch part 12 such that they are opened outward, and pawl parts 14 projected inward from each of the leg parts such that they intersect the respective leg parts 13.