Fastener stringer and slide fastener

Patent metadata

Field	Value
Publication number	US-9289034-B2
Application number	US-201013884311-A
Country	US
Kind code	B2
Filing date	Nov 10, 2010
Priority date	Nov 10, 2010
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

A continuous fastener element in a fastener stringer has a plurality of fine projections disposed on a circumferential surface of a monofilament continuously along a length direction of the monofilament and a plurality of recesses disposed between the projections. A cross-sectional shape of the projection is curved convexly, and a cross-sectional shape of the recess is curved concavely. A curvature of the convex curved surface of the projections is set to be larger than a curvature of the concave curved surface of the recess in a cross-section of the monofilament. At least the projections disposed on the upper and lower leg parts are twisted with respect to an extension direction of the upper and lower leg parts, and a plurality of the projections disposed on the upper leg part or the lower leg part in a twisted state face the same direction.

First claim

The invention claimed is:

1. A fastener stringer for a slide fastener, in which a continuous fastener element molded from a monofilament made from a thermoplastic resin is attached to a tape edge portion of a fastener tape, and the fastener element includes a coupling head, upper and lower leg parts extending in a tape width direction from the coupling head, and a connecting portion that connects one of the upper and lower leg parts to one of the upper and lower leg parts of a fastener element that is adjacent in a length direction of the fastener tape, wherein:
a plurality of fine projections disposed continuously along the length direction of the monofilament and a plurality of recesses disposed between the projections are disposed on a circumferential surface of the monofilament,
a diameter of the monofilament is in a range from 0.35 mm to 2.30 mm, and a number of the projections and recesses disposed on the circumferential surface of the monofilament is in a range from 12 to 72,
a cross-sectional shape of each of the projections is curved convexly, and a cross-sectional shape of each of the recesses is curved concavely,
convex curved surfaces of the projections and concave curved surfaces of the recesses are alternately formed continuously,
a curvature of the convex curved surfaces of the projections is larger than a curvature of the concave curved surfaces of the recesses in a cross-section of the monofilament,
at least the projections disposed on the upper and lower leg parts are twisted with respect to an extension direction of the upper and lower leg parts, and
a plurality of the projections disposed on the upper leg part or the lower leg part in a twisted state face the same direction.

2. The fastener stringer according to claim 1 , wherein a protruding height of the projection is set in a range of 2.5 μm or more and 200 μm or less.

3. The fastener stringer according to claim 1 , wherein:
the fastener element includes a recess disposed between the projections, and
in a cross-sectional view of the monofilament, a diameter of a first imaginary circle that is formed so as to connect bottoms of the recesses has a size that is 80% or more of a diameter of a second imaginary circle that is formed so as to connect apexes of the projections.

4. The fastener stringer according to claim 1 , wherein, in a cross-sectional view of the monofilament, an interval in a circumferential direction between predetermined positions of the projections is set in a range of 24 μm or more and 200 μm or less.

5. The fastener stringer according to claim 3 , wherein, in a cross-sectional view of the monofilament, at least one of the projections is configured such that one curved surface portion disposed to extend from the apex to the recess on one side is asymmetrical with respect to another curved surface portion disposed to extend from the apex to the recess on the other side.

6. A slide fastener wherein it includes a pair of left and right fastener stringers according to claim 1 .

7. The slide fastener according to claim 6 , wherein a twisting direction of the projection with respect to the extension direction of the upper and lower leg parts is different between the left and right fastener stringers.

Assignees

• Yamakita Yoshimichi
• Mori Takashi
• Inomata Tadahiro
• Ykk Corp

Inventors

• Yamakita Yoshimichi
• Mori Takashi
• Inomata Tadahiro

Classifications

• Y10T24/25

  Zipper or required component thereof · CPC title

• B29D5/02

  the fasteners having separate interlocking members · CPC title

• Y10T24/2518

  having coiled or bent continuous wire interlocking surface · CPC title

• A44B19/12 Primary

  Interlocking member in the shape of a continuous helix · CPC title

• A44B19/34 Primary

  Stringer tapes (A44B19/40 takes precedence); Flaps secured to stringers for covering the interlocking members (A44B19/32 takes precedence {; setting slide or glide fastener elements on garments A41H37/06}) · CPC title