Dynamic magnetic information storage or retrieval – Head – Head accessory
Reexamination Certificate
2007-11-13
2007-11-13
Young, Wayne (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Head accessory
C360S090000
Reexamination Certificate
active
10502608
ABSTRACT:
A magnetic tape cartridge and A magnetic tape cartridge recording/reproducing apparatus, which can prevent a magnetic tape from being charged to avoid damage of a magnetic head while lowering the resistance of the magnetic tape and maintaining optimum electromagnetic conversion properties. A tape reel (7) is formed from a conductive material, and one end portion of a magnetic tape (6) connected to a reel hub (7B) has a surface resistivity [Ω/sq] in the order of 107or less. In the magnetic tape (6) having a multilayer structure which comprises a magnetic layer (23), a nonmagnetic conductor layer (22), a plastic film (21), and a back coat layer (24) from the magnetic surface (6M) side, even when the surface resistivity of the magnetic layer (23) exceeds 107Ω/sq, the magnetic layer (23) is removed and the exposed nonmagnetic conductor layer (22) is connected to the reel hub (7A), thus lowering the resistance of the magnetic tape while maintaining optimum electromagnetic conversion properties.
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Hirai Noriyuki
Maeshima Katsunori
Okawa Wataru
Sato Satoshi
Yamaga Minoru
Frommer William S.
Frommer & Lawrence & Haug LLP
Levy Paul A.
Nguyen Linh T.
Sony Corporation
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