G - Physics – 11 – B
Patent
G - Physics
11
B
352/24.32
G11B 23/00 (2006.01) G11B 17/028 (2006.01)
Patent
CA 1310409
FLEXIBLE MAGNETIC DISC APPARATUS ABSTRACT OF THE DISCLOSURE In a flexible magnetic disc apparatus having a disc drive unit including a spindle with a cylindrical peripheral surface terminating at an upper margin thereof and a seating surface provided on the disc drive unit in a plane normal to the central rotary axis of the cylindrical peripheral surface, and a record disc including a flexible magnetic disc member, a reinforcing core member secured to the disc member at the center thereof and having an aperture for receiving the spindle and a reference surface engageable with the seating surface to limit the extension of the spindle through the aperture, spindle positioning projections extending into the aperture for engagement with the spindle therein and a resilient member extending into the aperture for pressing the spindle therein against the positioning projections; the top edges of the spindle positioning projections are located in respect to the reference surface so that, when the record disc is mounted on the disc drive unit with the reference surface engaging the seating surface, the cylindrical peripheral surface of the spindle always extends above the top edges of the positioning projections, not withstanding the standard dimensional tolerances, for ensuring that the positioning projections will accurately center the flexible magnetic disc member relative to the rotary axis.
523831
Nemoto Tsuneo
Sasaki Kazuo
Gowling Lafleur Henderson Llp
Sony Corporation
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