Dynamic magnetic information storage or retrieval – Head – Plural gaps
Reexamination Certificate
2007-03-13
2007-03-13
Castro, Angel (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Plural gaps
C360S125020
Reexamination Certificate
active
10981484
ABSTRACT:
A composite magnetic head comprising a DC-erasing head, which is slidably contact with a driving magnetic tape, and which DC-erases a servo band of the magnetic tape in such a manner that the direction of the magnetization of the servo band the servo band is directed towards one direction of the lengthwise direction of the magnetic tape; a servo writing head, which is slidably contact with the magnetic tape, and which writes a servo signal thereon so that the direction of the magnetization of the servo band is directed toward the reverse direction to the direction directed by the DC erasing head; and an AC-erasing head, which is contact with the magnetic tape, and which AC-erases the magnetization of the data band of the magnetic tape is disclosed. The servo writing head and the AC-erasing head are provided at downstream of the driving magnetic tape relative to the DC-erasing head, and the DC-erasing head, the servo writing head and the AC-erasing head are unified with each other.
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Castro Angel
Fuji Photo Film Co. , Ltd.
Sughrue & Mion, PLLC
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