Magnetic disk assembly having a hub with a circular recess exten

Details Magnetic disk assembly having a hub with a circular recess exten Magnetic disk assembly having a hub with a circular recess exten

1994-04-28

1995-01-17

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Record medium

In container

360135, G11B 23033, G11B 582

Patent

active

053830784

ABSTRACT:
A magnetic disk comprises a flexible disk-shaped magnetic sheet with a magnetic layer formed on a substrate film and having an aperture in the center of the disk; a center hub made of metal sheet and having a flange on its outer peripheral part, fabricated by inserting the center hub into the aperture of the magnetic disk-sheet, whereby the flange and an inner peripheral part of the magnetic sheet are bonded together, and wherein a circular recess with a cross-sectional shape, such as step or tapered-shape is provided in the outer peripheral part of the center-hub flange.

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patent: 4920441 (1990-04-01), Kimura et al.
patent: 4958249 (1990-09-01), Kadokura et al.
patent: 5090010 (1992-02-01), Takahashi

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