Yoshida Kogyo K.k.

Fuji Electric Co., Ltd.

Ykk Corporation

Akira Hasegawa

Hiroshi Yoshida

Kiyoshi Takeshima

Koichi Tanikawa

Tadahiro Takamatsu

Shunji Miyamoto

Masaaki Akanuma

Tetsuo Matsunaga

A slide fastener comprising a pair of stranger tapes, each including an elongated tape body including a plurality of warp threads and a beaded longitudinal edge portion provided on one longitudinal edge of the elongated tape body, the beaded marginal portion including a tube formed integrally with the elongated tape body and a plurality of filler threads inserted through the tube in such a way not to be intertwined with each other, the filler threads being identical in denier with the warp thread; and two rows of coupling elements extruded from plastics and each mounted on the respective beaded edge, each element comprising a coupling head and a pair of clamping legs extending rearward from the coupling head, each row of coupling elements being connected with two connecting rods embedded in the legs, each element clamp-mounted on the beaded edge with the legs sewn to the beaded edge by sewn stitches.

Stringer tape and slide fastener incorporating the same

In drying a beltlike article such as a slide fastener tape by high-frequency induction heating, the tape is wound on the outer circumferential surface of a rotary drum heated from inside while rotating. An induction heating coil is mounted on the outer circumferential surface of a stationary drum, as an inner drum, with a gap with the inner circumferential surface of the rotary drum. The rotary drum is supported at one end by a rotary shaft via an adiabatic material. The stationary inner drum is made of a metal plate having a high heat conductivity for facilitating heat radiation of the heating coil, while the rotary drum is made of a cladding plate including iron and copper plates in combination.

Method and apparatus for drying beltlike article, and induction heater

An electrolytic processing system performs a continuous electrolytic process to discrete conductors such as metal coupling elements of a slide fastener chain or conductive objects having a large electrical resistance. In the electrolytic processing system, an object is electrolytically processed while it is guided between intermediate rollers and arc electrodes.

Electrolytic processing system

In a method for continuously manufacturing slide fastener coupling elements, a molded strip of coupling element blanks is folded by a first folder unit about its longitudinal axis while still hot into a U-shaped cross-section to provide a folded strip of coupling element blanks each having a width larger than a predetermined width of each of the coupling elements as ultimately shaped. After having been heated by a hot-air blower, the hot folded strip of blanks is shaped by a second folder unit into slide fastener coupling elements of a finalized shape and dimensions through a plurality of bending stages in which the widths of the coupling element blanks are constricted stepwise by the second folder unit as the folded strip of blanks is fed therethrough.

Method for continuously manufacturing slide fastener coupling elements

Slide fastener chain

A slide fastener stringer has a continuous strip of spaced thermoplastic molded coupling elements interconnected by a pair of embedded connector threads and attached to a stringer tape along a longitudinal edge thereof, each of the connector threads being covered, at its portions between adjacent coupling elements, with a thermoplastic coating integral with the coupling elements.

Slide fastener stringer

A slide fastener stringer having a continuous zigzag-shaped thermoplastic molded coupling element strip. The strip includes a succession of spaced coupling elements, each having a pair of first and second legs extending from a head in a common direction, and a plurality of first and second solid connecting portions alternately disposed at opposite sides of the strip and extending one between each adjacent pair of the coupling elements. Each first connecting portion and each second connecting portion extend between an adjacent pair of the first legs and between an adjacent pair of the second legs, respectively. The connecting portions are thin or more slender than the legs. A pair of connector threads extends transversely of the coupling elements through the full length of the strip and they are embedded in the first and second legs, respectively, of each coupling element, each connector thread being disposed close to and extending along a respective one of such two series of the first and second connecting portions.

Slide fastener stringer having continuous thermo-plastic molded coupling

A slide fastener stringer having a continuous thermoplastic molded coupling element strip attached to a longitudinal edge of a tape. The strip includes a row of spaced coupling elements interconnected by a pair of series of first and second thermoplastic molded connecting portions. Each first connecting portion extends between first legs of two adjacent coupling elements and each second connecting portion extends between second legs of two adjacent coupling elements. A pair of connector threads extends parallel to the first and second connecting portions, respectively, along the full length of the strip and is embedded in the first and second legs, respectively, of each coupling element.

The invention provides a novel method for non-electrolytically forming a protective film on the surface of a shaped article made of aluminum or an aluminum-based alloy having high durability in respect of corrosion resistance and light resistance. The method is particularly suitable for the surface treatment of aluminum-made fastener elements of a slide fastener chain fastened to the fastener tape along the periphery thereof. The inventive method comprises the steps of cleaning the surface of the aluminum article, e.g. by degreasing and rinsing with water, chemical conversion treatment of the article in a treatment solution to form a conversion film on the surface, removal of the treatment solution from the surface of the article as completely as possible and heating the article at a temperature in the range from 90.degree. to 150.degree. C., preferably, for 3 to 9 minutes to increase the stability and to strengthen the adhesion of the conversion coating film on the surface of the article.

Method for forming protective surface film on aluminum shaped articles

A separable slide fastener which includes a pair of stringers, a pair of pin members each secured at one end portion of one stringer, and a retainer for separably closing said pin members to each other is disclosed. The retainer may be a slidable one wherein the retainer can slide over both stringers and receive both pin members therein or a fixed one which includes a box having an opening for receiving the other pin member therein fixed to one of the pin members. The pin members are modified fastener elements formed by cutting the coupling heads off from some of the fastener elements positioned at one end portion of each stringer.

Growing community of inventors

Kurobe, Japan

Akira Hasegawa