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:
Mar. 12, 2002
Filed:
Jan. 21, 2000
John Patrick Hagen, Rochester, MN (US);
Daniel A. Neseth, Byron, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A device and associated method useful for determining whether a disk has a chipped edge. The preferred device includes a laser that radiates a laser beam to the disk in the vicinity of its edge. The preferred device also includes a radiation detector for detecting electromagnetic radiation from the laser after the radiation has been transmitted, reflected, retracted or scattered by the disk. A chip in the vicinity of the edge of the disk will direct the electromagnetic radiation differently than an intact disk edge. Therefore, the radiation detector can utilize changes in the detected electromagnetic radiation in order to determine whether the edge of the disk is intact or whether it has a defect, such as an edge chip.