Hitachi, Ltd.

Hitachi Plant Engineering Construction Co., Ltd.

Mitsushi Endo

Yoshiki Kato

Katsuyoshi Chiba

Teruo Tsunoda

Heigo Ishihara

Tomio Suzuki

Yoichi Oba

Hajime Fukke

Munehisa Mitsuya

Waichi Nagashiro

Teruaki Kobayashi

Hidenao Kawai

Tatsuo Yoshitomi

Masa-aki Imamura

Yoichi Nakagawa

Shuichi Kaizyo

Yoshiteru Nagatani

Katuji Itikawa

Kozo Takahashi

Noriyuki Hayakawa

Fumihiko Sawase

Teruyoshi Sahara

Toshiaki Taniguchi

Teruo Takizawa

Kazuo Yamagami

The present invention relates to an air-conditioning and an environmental control device for manufacturing plants of integrated circuits, chemicals and foods, hospitals, etc. where clean air is required. In this environmental control device, controlled air blows out from one side and is absorbed into the other side of the room. The blowing surface and the absorbing surface are divided on the basis of the predetermined module. Ventilating units are formed in a suitable size to conform to the module. Because of the construction, the controlling system of temperature or cleanliness of the air in the environmental control room can be rearranged to an optional one by replacing or changing positions of the ventilating units. Even if a controlling system is rearranged to an optional one, the room should be divided into a supply chamber, a mixing chamber, an environmental control chamber and a return chamber from one side to the opposite side of the room, so that air conditioned can flow as required. Conditioned air enters the supply chamber, and air from the supply chamber and air from the return chamber are mixed in the mixing chamber. The mixed air passes through the ventilating units contained in the mixing chamber to be supplied into the environmental control chamber. The ventilating units have a fan and a high efficiency particulate air (HEPA) filter.

Rearrangeable partial environmental control device

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 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

Growing community of inventors

Hadano, Japan

Mitsushi Endo