Ykk Corporation

Futoshi Kozato

Yusuke Meiwa

Hayato Ishii

Kiyoyuki Okuyama

Naoyuki Himi

Takahiro Fukuyama

Chikako Hiromi

Nanahiko Mio

Massimiliano Di Girolami

Shigeru Tsuchida

Koichi Mikado

Giovanni La Rocca

Hirofumi Tanikoshi

Hironobu Wakasa

Teruo Ozaki

Masataka Kawazoe

Takuro Hayashi

Yozo Okada

Makoto Yoshida

Masamichi Yamagata

Legs of a pair of legs are provided with core-thread-pressing surfaces that slant gradually to approach one another as being away from the stopping surfaces. Each core-thread-pressing surface extends from the stopping surface to the base end of the leg. A thickness of each leg in a thickness direction of the fastener tape gradually increases from the free end toward the base end of the leg in accordance with at least the slanting of the core-thread-pressing surface.

Metallic element and slide fastener

There is provided a stop for a slide fastener. A top plate and a bottom plate are linked with one another at a transversely intermediate position by an integral connecting post. The lower side of the top plate is substantially flat. The bottom plate slopes away from the connecting post to form two leg members provided with a respective end flange pointing towards the top plate, the leg members being adapted to cooperate in use with the top plate to retain fastener tapes therebetween.

Stop for a slide fastener, and a method for the manufacture thereof

A slide fastener is provided. Each of a pair of first and second stringers includes a tape and a row of coupling elements mounted on a longitudinal edge of the tape. Each of the coupling elements comprises a first non-connecting portion at an upper side of the tape and a second connecting portion at a lower side of the tape. The second connecting portion comprises a head portion and a body portion. The head portion is engageable with a head portion of opposing coupling element. The body portion is fixed to the tape.

Slide fastener with flat elements

Provided are a metal double-sided tooth that prevents a flow protruding portion from protruding from the boundary between a coupling concave portion and a body, and a slide fastener using the metal double-sided tooth. The inner side of a coupling concave portion is formed in a substantially bowl shape and a concave portion is formed throughout the boundary between the coupling concave portion and a body and a front side and a rear side of the body. Further, when the metal double-sided tooth is attached to a fastener tape, it is possible to prevent a flow protruding portion generated by caulking a pair of legs from protruding outward from the coupling concave portion or the front side and the rear side of the body until sliding friction is generated in a slider.

Metal double-sided tooth and slide fastener

Chain for slide fastener

Metallic one-side teeth include an upper inclined plane declining toward the side of interlock dent portion provided between the opening edge of the interlock dent portion and the apical edge of an interlock head portion.

Metallic one-side teeth and two-way slide fastener

A metallic slide fastener element in which an exposed portion outside of an element is finished uniformly with a high smoothness and the fixing strength to a fastener tape is intensified, and a method for effectively manufacturing the same element, wherein a metallic flat type wire rod is placed on a die and the flat type wire rod is punched out with a punch so as to produce a slide fastener element, and at this time, a mouth on a punch side of the die or a peripheral edge of the die is chamfered at a radius of 0.01 to 1.0 mm and a clearance between the punch and the die is set to 0 to 30 &#x3bc;m, so that an element, which has a cut surface comprising a shear surface of 80% or more and a fracture surface of less than 20% and is suitable as a slide fastener to be attached to a high quality product, is obtained.

Metallic slide fastener element and method for manufacturing the same

An aluminum alloy with excellent decorativeness, having a composition represented by the general formula AlMgMnCr, wherein b, c, and d are, in mass percentage, 3.0&#x2266;b&#x2266;5.6, 0.05&#x2266;c&#x2266;1.0, 0.05&#x2266;d&#x2266;0.7, c+d&#x3e;0.2, and a is the balance with unavoidable impurity elements possibly being contained, wherein a matrix of the aluminum alloy is a structure substantially composed of an aluminum solid solution, in which no &#x3b2;-phase is present. This alloy has excellent decorativeness and decorativeness as well as superior strength, hardness and other such mechanical properties and is useful as materials for slide fastener constituent members, such as their elements, stops, and sliders, and/or in snap buttons, ordinary buttons, and clasps.

Aluminum alloy with excellent decorativeness

In a upper stopper device for a slide fastener having a cross section of a substantially U shape, which is adapted to be attached continuously to a fastener element row of a stringer capable of being engaged with or separated from each other, an end portion of the upper stopper device opposite to the fastener element row is formed with a widened portion, which abuts against wing plates at a shoulder opening of a slider into which the stringer is inserted so that the slider can stop. Further, a caulking portion is formed in a range between the widened portion and at an end portion side toward the fastener element row. The slider abuts against the widened portion of the upper stopper device attached to the stringer so that it reliably stops.

Growing community of inventors

Toyama, Japan

Futoshi Kozato