Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2007-01-30
2007-01-30
Sniezek, Andrew L. (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
Reexamination Certificate
active
11129400
ABSTRACT:
In a recording/reproducing method of a magnetic tape in a tracking servo system, a recording density of each data track is increased while inhibiting occurrence of a recording/reproducing error caused by a size change of a magnetic tape in the width direction. Data tracks are each set to have a smaller track width stepwise as closer to servo tracks (41T-1to41T-5etc.) in the width direction of a magnetic tape1. With such a setting, the width of the data tracks (A1-41T-1to A1-41T-5etc.) closest to the servo tracks (41T-1to41T-5) can be minimized, thereby enabling a significant increase in number of the data tracks. Further, even when the size of the magnetic tape1changes in the width direction due to a change in external environment such as a temperature or moisture, to lead to large displacement of the data tracks (A8-41T-1to A8-41T-5) distant from the servo tracks (41T-1to41T-5), the data head (A8) can be readily aligned to face the data tracks (A8-41T-1to A8-41T-5) in the reproduction by an increased portion of the width size of the data tracks (A8-41T-1to A8-41T-5), and it is thereby possible to ensure reading of data signals from the data tracks (A8-41T-1to A8-41T-5) so as to improve reproduction accuracy.
REFERENCES:
patent: 6222698 (2001-04-01), Barndt et al.
patent: 2005/0117246 (2005-06-01), Sueki et al.
patent: 2002-157722 (2002-05-01), None
patent: 2003-173508 (2003-06-01), None
Doi Tsugihiro
Inoue Tetsutaro
Kawarai Seigi
Kuse Sadamu
Mitsuhashi Hiroyuki
Hitachi Maxell Ltd.
Sniezek Andrew L.
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