Hardened center pin contract area on magnetic disk cartridge

Details Hardened center pin contract area on magnetic disk cartridge Hardened center pin contract area on magnetic disk cartridge

1990-02-16

1991-10-01

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record medium

In container

360 9701, G11B 2303

Patent

active

050539051

ABSTRACT:
A magnetic disk cartridge is of the type in which a magnetic disk is rotatably disposed within a jacket. A hardened layer of an ultraviolet ray hardening resin is formed on an inner surface of the jacket which is contacted with a tip of a center pin of a magnetic disk driving apparatus passing through an opening portion of the magnetic disk. The hardness of the hardened layer is 1.times.10.sup.10 dyn/cm.sup.2 to 1.times.10.sup.5 dyn/cm.sup.2.

REFERENCES:
patent: 4812937 (1989-03-01), Nemoto et al.
patent: 4855857 (1989-08-01), Ono et al.

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