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:
Apr. 03, 2007
Filed:
Mar. 30, 2004
Stephen J. Rothermel, Roseville, MN (US);
Richard E. Jewett, Minneapolis, MN (US);
Stephen J. Rothermel, Roseville, MN (US);
Richard E. Jewett, Minneapolis, MN (US);
Imation Corp., Oakdale, MN (US);
Abstract
The invention is directed to a servo writing apparatus having accurate alignment of write gaps of servo write heads. In particular, the write gaps substantially align in a servo channel corresponding to a servo band of a magnetic data storage tape. The servo band is fully magnetized (a.k.a. DC erased) in one direction by a direct current (DC) magnetic field across the write gap of one of the servo write heads. Time-based servo markings magnetized in a second direction are recorded on the fully magnetized servo band by a pulsed magnetic field across the write gaps of the other servo write head. The servo write heads may be mounted in a mounting structure within the servo writing apparatus. Maintaining a large mounting structure width to servo write head separation distance ratio improves write gap alignment accuracy, which assures full servo signal strength across the servo band without magnetizing adjacent data bands.