Hitachi, Ltd.

Topre Corporation

Mikio Takada

Hiroyuki Suzuki

Akira Kato

Masaki Ohura

Kousaku Wakatsuki

Teruyoshi Higashiya

Yoshihiko Miyake

Toshinori Kazama

Shyuichi Kojima

Keigo Iechika

A square pipe manufacturing method includes: a first processing step of forming a first intermediate formed productby bending both widthwise end portions of a rectangular metal plate; a second processing step of forming a second intermediate formed productby bending both widthwise sides of a bottom surfaceof the first intermediate formed product; a third processing step of obtaining a third intermediate formed productby curving the side wall surfacesto be convex outward in the width direction by pressing the flange partstoward the bottom wall surfaceand then pressing the curved side wall surfacesinward in the width direction; and a fourth processing step of crush-deforming cornersof the third intermediate formed product

Square pipe, frame structure, square pipe manufacturing method, and square pipe manufacturing apparatus

A disk-type recording medium having a circular substrate on which a recording layer is formed does not include any through hole formed in the center of rotation. Since no through hole is formed, it is possible to improve the reliability of the medium with regard to its strength, and to reduce the thickness of the substrate. Further, it is possible to render the thickness of the recording coating uniform.

Disk-type recording medium and storage apparatus

Protruding portions are formed on outflow ends of slider rails on a floating magnetic head slider. This floating magnetic head slider is of rails type. Each of the protruding portion extends farther to the outside as it approaches the outflow end. Or the external sides of the rails on the magnetic head slider are so arranged that angles formed thereat diverge from the side of the inflow end to the side of the outflow end, and a pressure adjusting aperture is formed on the outflow side of each of the rails. Because of the above arrangement, it is possible to provide a magnetic head unit in which particles, such as dust, adhering to the disk surface are effectively removed, and in which floating stability is not impaired. Removing the particles on the disk surface is not limited by seeking directions even while the magnetic disk unit is in operation.

Rail-type floating magnetic head slider

Growing community of inventors

Kanagawa, Japan

Mikio Takada