The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 1999
Filed:
Apr. 17, 1997
Chad R Sandstrom, Stillwater, MN (US);
Imation Corp., Oakdale, MN (US);
Abstract
Hubless optical disc having low radial runout. The optical disc is capable of containing a high capacity of information therein. The optical disc includes a disc substrate having a formatted surface. A mechanism is provided within the disc substrate for mating the optical disc with a drive spindle, wherein the formatted surface is concentrically registered relative to the mechanism within the disc substrate. In one embodiment, the mechanism may comprise an annular groove, annular ridge, or a plurality of holes molded in the disc substrate. The present invention includes optical tooling for forming the hubless optical disc having low radial runout. The present invention further includes an optical disc player drive spindle capable of mating with the high-capacity hubless optical disc.