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. 30, 1999
Filed:
Jan. 21, 1997
Applicant:
Inventors:
Hiro Karube, Tokyo, JP;
Akihiro Osaka, Tokyo, JP;
Assignee:
NEC Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 75 ; 360104 ;
Abstract
In order to avoid appearance of indifferent zone of positioning signals obtained from a burst pattern recorded on a magnetic disk because of erase bands derived on outer border lines of burst tracks, width of a magnetic gap of the reproducing head of the invention is designed to be not narrower than width of a pitch of the burst tracks added with width of the erased band and not wider than two times of said width of a pitch of the burst tracks reduced of said width of the erased band.