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:
May. 07, 1991
Filed:
Dec. 21, 1989
Applicant:
Inventors:
Rick C Price, Fremont, CA (US);
Atef H Eltoukhy, Saratoga, CA (US);
Yassin Mehmandoust, Berkeley, CA (US);
Assignee:
HMT Technology Corporation, Fremont, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B24B / ;
U.S. Cl.
CPC ...
51140 ; 51141 ; 5114 / ;
Abstract
Method and apparatus for treating the surface of a magnetic disc to remove surface asperities and loosely bound material. The disc is alternatively treated by contact with a pair of moving belt-like tapes, a pair of flying heads, and second contact with the belt-like tape, with the disc carried at a fixed position for rotation in a vertical plane throughout, but rotated at a higher speed during the intermediate flying waffling step. The first and/or second tape-treatment steps can be used to apply a lubricant film to the disc surface.