Disc recording medium with check insertion hole extending across

Details Disc recording medium with check insertion hole extending across Disc recording medium with check insertion hole extending across

1998-07-29

2000-05-09

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Record medium

In container

360 9905, 369271, G11B 2303

Patent

active

060612150

ABSTRACT:
A signal recording medium capable of being strongly secured to a rotation part such as a disc table even during high-speed rotation includes a floppy disc with a hub at its center portion and a disc substrate having a disc-shaped main portion with a circular opening operating as a mounting portion for the hub. The disc substrate has also a signal recording surface on the disc-shaped main portion. The hub includes an abutment surface abutted against the disc table and rotated in unison with the floppy disc and a facing suction surface spaced apart from a suction magnet mounted on a rim portion of the disc table when the abutment surface is abutted against a hub setting surface of the disc table.

REFERENCES:
patent: 4989107 (1991-01-01), Tsukahara
patent: 5450260 (1995-09-01), Sakaguchi et al.
patent: 5476700 (1995-12-01), Asai et al.
patent: 5761016 (1998-06-01), Watanabe

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