Magnetic disc cartridge with spindle abutment plate

Details Magnetic disc cartridge with spindle abutment plate Magnetic disc cartridge with spindle abutment plate

1988-12-02

1989-08-08

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

In container

360 9701, G11B 2302

Patent

active

048558575

ABSTRACT:
A drive spindle abutment plate 14 centrally mounted on the inner wall of a protective envelope enclosing a floppy disc is formed by a surface layer 15 of macromolecular polyethylene or the like and an interposed base layer 16 of relatively hard material such as polyethylene terephthalate. Indentation by the end of the spindle during use is thus minimized to preserve the necessary gap between the envelope and the disc core 6, thereby preventing the core from scratching against the envelope and disturbing the disc rotation.

REFERENCES:
patent: 4149207 (1979-04-01), Porter et al.
patent: 4529645 (1985-07-01), Berg et al.
patent: 4544977 (1985-10-01), Ozawa et al.
patent: 4609964 (1986-09-01), Sobel
patent: 4647506 (1987-03-01), Colon et al.
patent: 4672488 (1987-06-01), Wright

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