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:
Feb. 28, 1989
Filed:
Oct. 08, 1987
Applicant:
Inventor:
Friedrich R Hertrich, Boulder, CO (US);
Assignee:
Digital Equipment Corporation, Maynard, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360122 ; 360121 ;
Abstract
A self-cleaning head assembly characterized by one or more raised head islands with convex top surfaces and sloped sides, and designed to be used with a recording medium, such as a magnetic tape, which wraps each island. The machined radius of curvature of the top surface of the head island is not less than half the natural curvature of the tape, and the running radius of the head is approximately equal to the natural curvature of the medium. A steep angle of approach between tape and head provides cleaning action, while the small top surface reduces errors due to lift-off and provides superior magnetic contact.