US 7,520,032 B2Granted

Linear slide fastener

AssigneeYKK Corporation

InventorsYoshihiro Kousaka, Sotoji Yonishi, Takumi Arai

Life of this patent

Estimating the term…

Loading patent…

Abstract

The invention provides a linear slide fastener wherein a concave portion accommodating a fixing thread for fixing a fastener tape is provided on a top face of an upper leg portion of a coil-like/zigzag-like linear fastener element, when dimensions from a bottom face of a lower leg portion to a top face of the upper leg portion on a coupling head side, at the concave portion and on an inverted portion side are assumed to be H1, H2 and H3, a setting condition of H1>H3>H2 is satisfied and when dimensions from a bottom face of the upper leg portion to a top face of the lower leg portion within a gap portion on the coupling head side, at a convex portion and on the inverted portion side are assumed to be H4, H5 and H6 respectively, a setting condition of H4>H6>H5 is satisfied.

Claims5

Dependent claims

A linear slide fastener in which a linear fastener element fixed to a side edge of a fastener tape with a fixing thread, wherein a concave portion for accommodating the fixing thread is formed on a top face of an upper leg portion of the linear fastener element, and when heights from a bottom face of a lower leg portion up to the top face of the upper leg portion on a side of a coupling head, at the concave portion and on a side of an inverted portion are assumed to be H1, H2 and H3 respectively, a condition of H1>H3>H2 is provided,

a convex portion projecting toward a top face of the lower leg portion is formed on a bottom face of the upper leg portion,
when heights from the bottom face of the upper leg portion to the top face of the lower leg portion on the side of the coupling head and at the convex portion are assumed to be H4 and H5 respectively, a condition of H4>H5 is provided, and
wherein a width from an end of the concave portion on the side of the coupling head to a deepest portion of the concave portion formed on the top face of the upper leg portion is smaller than a width from an end of the concave portion on the side of the inverted portion to the deepest portion of the concave portion,
wherein a core thread is inserted through the convex portion and the side of the inverted portion in a gap portion formed between the upper leg portion and the lower leg portion of the linear fastener element, and
wherein a gradient of slope from an end of the concave portion on the side of coupling head to the deepest portion of the concave portion formed on the top face of the upper leg portion is sharper than a gradient of slope from an end of the of the concave portion on the side of the inverted portion to the deepest portion of the concave portion.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/373,741Filed 10 Mar 2006
Priority: JP 2005-07145014 Mar 2005
Published: US 2006/0200950 A114 Sep 2006
Granted: 21 Apr 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

A44B 19/406
Connection of separate, or one-piece, interlocking members to stringer tapes; Reinforcing such connections, e.g. by stitching: connection of…
A44B 19/12
With a one-piece interlocking member on each stringer tape: interlocking member in the shape of a continuous helix
Y10T 24/2523
Having coiled or bent continuous wire interlocking surface: with core encircled by coils or bends
Y10T 24/2525
Having coiled or bent continuous wire interlocking surface: with mounting portion having structural formations complementary to stitching