Ykk Corporation

Director-general of Agency of Industrial Science and Technology

Masayuki Kobayashi

Tadashi Yamaguchi

Hideki Takeda

Etsuji Sugita

Hideo Fukui

Hironori Arakawa

Kazuhiro Sayama

Toshio Arai

Takeshi Taniguchi

Hidenobu Nagahama

Kiyomi Okabe

Hitoshi Kusama

Nobuyuki Nakada

In the production of a hollow cast article having a slit, the release of a hollow cast product from a mold is carried out while opening the hollow cast product. In one embodiment, a core provided with recessed parts (or projected parts) formed in a slit forming part (or an outer peripheral part) is used and the drawing out of the core from the hollow cast product is carried out while opening the hollow cast product by means of the recessed parts (or projected parts) mentioned above. By such a method, a hollow cast article having a slit and projected parts (or recessed parts) formed in a slit part or/and an inner peripheral part thereof is obtained. In the case of the use of a core having a slit forming part of a taper-shaped ridge of which width gradually decreasing from a large width at one end to a small width at the other end, the core is drawn out from the hollow cast product in the direction to the other end of small width to open the hollow cast product by means of the slit forming part of the taper-shaped ridge.

Hollow cast article with slit, method and apparatus for production thereof

A conversion adapter to be used for connecting opposed optical connector ferrules having different diameters is formed of an amorphous alloy possessing at least a glass transition region, preferably a glass transition region of not less than 30 K in temperature width. Particularly, the amorphous alloy of M &mdash;M system or M &mdash;M &mdash;La system (M : Zr and/or Hf, M : Ni, Cu, Fe, Co, Mn, Nb, Ti, V, Cr, Zn, Al, and/or Ga, La: rare earth element) possesses a wide range of &Dgr;Tx and thus can be advantageously used as a material for the conversion adapter. Such a conversion adapter can be manufactured with high mass-productivity by a mold casting method or molding method.

Conversion adapter for ferrules having different diameters and method for production thereof

A catalyst for methanol synthesis and reforming which is constituted of copper, zinc, and aluminum oxides and has a structure comprising copper or copper oxide particles covered with a film of aluminum oxide and zinc oxide. The copper or copper oxide particles preferably have a particle size of 1 to 100 nm. The film of aluminum oxide and zinc oxide preferably has a thickness of 0.1 to 100 nm. The proportions of the copper, zinc, and aluminum elements are 68.0 to 86.0% by weight, 4.5 to 21.0% by weight, and 2.0 to 20.0% by weight, respectively. The foregoing highly active catalyst comprising copper, zinc, and aluminum oxides can be obtained not by a costly special technique but by the coprecipitation method, which is the most common process for catalyst production, without using any additive element.

Catalyst for methanol synthesis and reforming

Disclosed is an aluminum building material which comprises a substrate made of aluminum or an aluminum alloy, an anodic oxide film formed on the surface of the substrate, and a thin film containing a photocatalytically active semiconductor and deposited on the anodic oxide film. The film containing the photocatalytically active semiconductor embraces both a film formed solely of the semiconductor mentioned above and a film having fine particles of the semiconductor incorporated in or deposited on a suitable carrier such as, for example, a coating film. A fixture unit is also provided which comprises a frame member made of the aluminum building material mentioned above, a panel member having the surface thereof coated with a film containing a photocatalytically active semiconductor, and a watertight and airtight member containing fine particles of a photocatalytically active semiconductor.

Antibacterial, antifungal aluminum building materials and fixtures using

Growing community of inventors

Miyagi, Japan

Masayuki Kobayashi