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:
Jul. 22, 1986
Filed:
Jan. 13, 1984
Applicant:
Inventors:
Shunji Saito, Numazu, JP;
Tetsuro Ichitani, Mishima, JP;
Assignee:
Tokyo Electric Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360 69 ; 360 70 ; 360 75 ; 360 78 ;
Abstract
A magnetic disk drive apparatus writes data in a magnetic disk by use of first and second magnetic heads. The track position on the magnetic disk where the first or second magnetic head exists is detected, and a delay time corresponding to the detected track position is set into a timer circuit. In the write-in mode, a CPU starts the operation of a read/write head section of the selected one of the first and, second magnetic heads and thereafter, when a delay time which is set into the timer circuit has passed, the CPU starts the operation of an erase head section of the selected one of the first and second magnetic heads.