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:
Aug. 19, 2003
Filed:
Apr. 18, 2002
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A 2 reel type data storage magnetic tape cassette ( ) is provided with reels ( ) around which a magnetic recording medium ( ) is wound. The magnetic recording medium ( ) includes a support, a non-magnetic layer comprising a non-magnetic powder and a binder on one surface of the support, a magnetic layer comprising a ferromagnetic metal powder and a binder on top of the non-magnetic layer, and a back layer comprising a carbon black powder and a binder on the other side of the support. The magnetic tape cassette ( ) is further provided with a rotating guide roller ( ) made of a resin within the cassette ( ). The rotating guide roller ( ) has a ten-point average roughness Rz of 3.0 to 4.5 &mgr;m and is in contact with the surface of the magnetic layer having a center plane average roughness SRa of 2.0 to 3.5 nm.