The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2007
Filed:
Jan. 20, 2003
Wataru Okawa, Miyagi, JP;
Minoru Yamaga, Miyagi, JP;
Katsunori Maeshima, Miyagi, JP;
Noriyuki Hirai, Miyagi, JP;
Satoshi Sato, Miyagi, JP;
Wataru Okawa, Miyagi, JP;
Minoru Yamaga, Miyagi, JP;
Katsunori Maeshima, Miyagi, JP;
Noriyuki Hirai, Miyagi, JP;
Satoshi Sato, Miyagi, JP;
Sony Corporation, Tokyo, JP;
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 () is formed from a conductive material, and one end portion of a magnetic tape () connected to a reel hub (B) has a surface resistivity [Ω/sq] in the order of 10or less. In the magnetic tape () having a multilayer structure which comprises a magnetic layer (), a nonmagnetic conductor layer (), a plastic film (), and a back coat layer () from the magnetic surface (M) side, even when the surface resistivity of the magnetic layer () exceeds 10Ω/sq, the magnetic layer () is removed and the exposed nonmagnetic conductor layer () is connected to the reel hub (A), thus lowering the resistance of the magnetic tape while maintaining optimum electromagnetic conversion properties.