Magnetic tape and magnetic tape cartridge

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

Reexamination Certificate

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Reexamination Certificate

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07092199

ABSTRACT:
A magnetic tape which is run at a speed of 4 m/sec. or higher and has recording tracks with a width of 21 μm or less, and which includes a non-magnetic support, at least one magnetic layer formed on one surface of the non-magnetic support, and a backcoat layer formed on the other surface of the non-magnetic support, wherein servo signals for controlling tracking are recorded on the magnetic layer or the backcoat layer, the value of (α/W) X (V/f) is 10 [s−1] or less, and/or the value of (α/W) is 0.1 or less, wherein V [mm/sec.] is the tape-running speed; α [μm] is an amount of a weave with a cycle of f [mm] on one edge of the tape or the other edge thereof, as the reference side, for the running of the tape; and W [μm] is a width of the recording track. The magnetic tape can decrease PES and off-track and thus is excellent in servo tracking performance.

REFERENCES:
patent: 2001/0024741 (2001-09-01), Ochi et al.
patent: 2003/0027018 (2003-02-01), Hayashi et al.
patent: 2105116 (1994-03-01), None
patent: 2335785 (1999-09-01), None
patent: 3-290888 (1991-12-01), None
patent: 9-265625 (1997-10-01), None
patent: 11-154311 (1999-06-01), None
patent: 11-238225 (1999-08-01), None
patent: 11-242814 (1999-09-01), None
patent: 11-250449 (1999-09-01), None
patent: 2000-040217 (2000-02-01), None
patent: 2000-040218 (2000-02-01), None
patent: 2000-155938 (2000-06-01), None
patent: WO-01/04879 (2001-01-01), None

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