Cartridge type recording medium and disk-shaped recording...

Dynamic optical information storage or retrieval – Dynamic mechanism optical subsystem – Optical storage medium support

Reexamination Certificate

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Reexamination Certificate

active

07073186

ABSTRACT:
The object of the present invention is to provide a technology which has high compatibility and can provide users with conveniences. A new system recording medium100has a center hole112formed on a recording disk110and a center hole121formed on a center hub120,so that the recording medium100can respond to both an old system driving unit having a centering member coupling with the center hole112and a new system driving unit300having a second centering member313coupling with the center hole121.Moreover, the old system recording medium is a recording medium providing a recording disk having a center hole incorporated in a cartridge having a center hub, and has a structure where the center hole is coupled both with a first centering member312of the new system driving unit300and with the centering member of the old system driving unit.

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