Magnetic disk cartridge and producing method therefor

Details Magnetic disk cartridge and producing method therefor Magnetic disk cartridge and producing method therefor

1987-12-11

1988-08-30

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record medium

In container

G11B 2303

Patent

active

047681233

ABSTRACT:
A magnetic disk cartridge used for memory means for a computer, which comprises a hard case composed of a cover member and a bottom member, and a magnetic disk having a central hole in which a pivot shaft of disk drive means is inserted. An anti-abrasion chip having a polygon shape including a triangle is attached to the inside of the cover member so as to receive the free tip of the pivot shaft of the disk drive means in contact therewith while the magnetic disk is rotated within the hard case. The shape of the anti-abrasion chip is a regular triangle, a right-angled triangle, an isosceles triangle, a square, a rectangle, a trapezoid or the like. A producing method for a magnetic disk cartridge is also disclosed. The anti-abrasion chip having a polygon shape including a triangle is made by cutting an anti-abrasion sheet attached to a base sheet without causing a disuse portion thereof.

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