Dynamic magnetic information storage or retrieval – Recording or reproducing plural information signals on the... – Head gap azimuth multiplex
Reexamination Certificate
2004-01-05
2008-09-02
Nguyen, Hoa T. (Department: 2627)
Dynamic magnetic information storage or retrieval
Recording or reproducing plural information signals on the...
Head gap azimuth multiplex
C360S064000, C360S076000, C360S077120, C360S130230, C360S121000
Reexamination Certificate
active
07420758
ABSTRACT:
Disclosed is a head system including a plurality of recording heads for azimuth recording. The system includes a first recording head having a plurality of magnetic gaps having a first azimuth angle, and a second recording head having a plurality of magnetic gaps having a second azimuth angle different from the first azimuth angle. After first magnetization patterns are formed on a recording medium by the first recording head, second magnetization patterns are formed by overwriting side edge portions in the formation direction of the first magnetization patterns by the second recording head. This makes it possible to prevent the worsening of the accuracy of the magnetization pattern width due to a relative height stagger (offset) between the heads, to thereby enhance the accuracy of the magnetization pattern width, and to achieve high-density recording.
REFERENCES:
patent: 4539615 (1985-09-01), Arai et al.
patent: 4901178 (1990-02-01), Kobayashi et al.
patent: 5023731 (1991-06-01), Morisaki
patent: 5089918 (1992-02-01), Hirayama et al.
patent: 5153980 (1992-10-01), Kira
patent: 5349478 (1994-09-01), Sato et al.
patent: 5459617 (1995-10-01), Yanagihara
patent: 5745318 (1998-04-01), Kubota et al.
patent: 5912780 (1999-06-01), Yamada et al.
patent: 5963388 (1999-10-01), Yoshida et al.
patent: 5973874 (1999-10-01), Panish et al.
patent: 5978165 (1999-11-01), Magnusson
patent: 5995315 (1999-11-01), Fasen
patent: 6014291 (2000-01-01), Watanabe et al.
patent: 6031673 (2000-02-01), Fasen et al.
patent: 6055358 (2000-04-01), Traxlmayr
patent: 6078459 (2000-06-01), Nonoyama
patent: 6104291 (2000-08-01), Beauvillier et al.
patent: 6172857 (2001-01-01), Inaguma et al.
patent: 6236538 (2001-05-01), Yamada et al.
patent: 6246830 (2001-06-01), Traxlmayr
patent: 6473273 (2002-10-01), Kikuiri
patent: 6496329 (2002-12-01), Hungerford et al.
patent: 6650496 (2003-11-01), Nozieres et al.
patent: 6922298 (2005-07-01), Ozue
patent: 7106535 (2006-09-01), Magnusson
patent: 2002/0080519 (2002-06-01), Hughes et al.
patent: 9-245394 (1997-09-01), None
Hashimoto Ichiro
Hida Hiroaki
Inoue Yasutoshi
Makise Tetsuro
Wakita Toshiaki
Kananen Ronald P.
Mercedes Dismery
Nguyen Hoa T.
Rader & Fishman & Grauer, PLLC
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