Disk cartridge having a hub including a stepped portion

Details Disk cartridge having a hub including a stepped portion Disk cartridge having a hub including a stepped portion

1985-07-11

1988-04-19

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

In container

G11B 2303

Patent

active

047394340

ABSTRACT:
A disk cartridge having a hard casing in which a magnetic disk with a hub is rotatably received. A stepped portion is formed at a peripheral edge portion of a contacting surface of the hub which is in contact with a supporter on a driving unit to support rotation of the hub, thereby increasing flatness in the contacting surface.

REFERENCES:
patent: 4445157 (1984-04-01), Takahashi
patent: 4571718 (1986-02-01), Cahill et al.
patent: 4573096 (1986-02-01), Gerfast
Johnson et al., "Cartridge and Cartridge-Actuating Mechanism for a Magnetic Recording Disk", IBM TDB, Mar. 1979, vol. 21, No. 10, pp. 4192-4194.

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