Hitachi, Ltd.

Teruo Tsunoda

Yoshiki Kato

Katsuyoshi Chiba

Heigo Ishihara

Hajime Fukke

Munehisa Mitsuya

Waichi Nagashiro

Reishi Naka

Teruaki Kobayashi

Masaaki Kashiwabuchi

Masaei Kawashima

Mitsushi Endo

Koosuke Tanaka

Nobuyoshi Suenaga

Syozo Ogawa

Miyakichi Kameda

Yoichi Oba

Masa-aki Imamura

Katuji Itikawa

Fumihiko Sawase

A photocatalystic decomposing apparatus comprises absorbent including honeycomb form active carbon and titanium oxide acting as photocatalyst applied to a surface of the active carbon, and a light source for generating ultraviolet rays exciting the photocatalyst. Stink ingredient is absorbed to the active carbon by passing air flow through openings in the honeycomb, and the absorbed stink ingredient is decomposed by exciting the photocatalyst due to application of the ultraviolet rays.

Refrigerating apparatus having a stink removing device

Apparatus for removing stink

A method of coating a magnetic disk wherein while rotating a disk held horizontal at a rotational frequency of 5-700 r.p.m., a magnetic coating composition is sprayed onto the upper and lower surfaces of the disk substantially simultaneously, to form coatings thereon, and the disk is further rotated at a raised rotational frequency, to adjust the thicknesses of the coatings. Further, in case of the rotation for adjusting the thicknesses of the coatings, a shield plate and a bottom plate are respectively disposed over and under the disk, or alternatively, shield plates are disposed over and under the disk, whereby the thicknesses of the coatings on both the surfaces of the disk are made uniform.

Coating method

A composition of magnetic recording media consisting of a ferromagnetic powder such as .gamma.-Fe.sub.2 O.sub.3, a binder and single crystal alumina as a reinforcing agent. Single crystal .alpha.-alumina is preferably used as said single crystal alumina and its amount is preferably from 1 to 20% by weight based on the magnetic powder.

Composition of magnetic recording media

A method of manufacturing a paint composite for magnetic films wherein a mixture consisting of a magnetic powder, a polymer such as polyvinylbutyral, and a solvent is ground under a shear stress of 10-400 kg/cm.sup.2, and the ground mixture has a solvent, an epoxy resin and a phenol resin added thereto and is further ground. When a magnetic disk is produced using a paint which has been obtained by executing the first grinding under a shear stress of 10-400 kg/cm.sup.2 with a kneader or the like, it is endowed with excellent electric characteristics and surface flatness.

Method of manufacturing a paint composite for magnetic films

A process for the preparation of a magnetic recording medium comprising;

Process for the preparation of magnetic recording medium

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Tokyo, Japan

Teruo Tsunoda