Recording medium and disc cartridge

G - Physics – 11 – B

Patent

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Details

G11B 23/00 (2006.01) G11B 23/03 (2006.01) G11B 23/033 (2006.01)

Patent

CA 2243786

A signal recording medium capable of being strongly secured to a rotation part such as a disc table even on high-speed rotation. A floppy disc includes a hub at its center portion and a disc substrate having in its disc-shaped main portion a circular opening operating as a mounting portion for the hub and also having a signal recording surface on the disc-shaped main portion. The hub includes an abutment surface abutted against the disc table 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 surfaces is abutted against a hub setting surface of the disc table.

Cette invention concerne un support d'enregistrement de signaux adapté pour un assujettissement ferme à une pièce tournant à haute vitesse telle qu'une platine porte-disque. Un disque souple comprend un moyeu central et un substrat ayant dans sa partie principale en forme de disque une ouverture circulaire servant au montage du moyeu et ayant aussi une surface d'enregistrement de signal. Le moyeu comprend une portée destinée à prendre appui sur la platine porte-disque devant entraîner le disque souple à la même vitesse qu'elle et une surface métallisée espacée par rapport à un aimant monté sur le pourtour de la platine porte-disque lorsque la portée susmentionnée est en appui sur une portée correspondante de la platine porte-disque.

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