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:
May. 04, 2004
Filed:
Aug. 16, 2001
Naoto Murao, Kanagawa, JP;
Makoto Sato, Kanagawa, JP;
Mitsugu Yamagishi, Kanagawa, JP;
Kiyoo Morita, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A tape reel ( ) is so constructed that an upper flange ( ) and a lower flange ( ) are respectively provided at an upper and a lower ends of a cylindrical reel hub ( ) around which a magnetic tape ( ) is wound, and a maximum value of a distance from the upper flange ( ) and the lower flange ( ) to lateral ends of the magnetic tape ( ) is set to be 0.5 mm or more, and less than 1.0 mm. The magnetic tape ( ) includes a nonmagnetic substrate ( ), a magnetic layer ( ) provided on one face of the nonmagnetic substrate and a back layer ( ) provided on the other face of the nonmagnetic substrate, and in a state where the magnetic tape is wound around the tape reel ( ), a distance (U +D ) from the upper flange ( ) and the lower flange ( ) to lateral ends of the back layer ( ) is larger than a distance (U +D ) from the upper flange ( ) and the lower flange ( ) to lateral ends of the nonmagnetic substrate ( ) or lateral ends of the magnetic layer ( ). Further, a magnetic tape cassette is provided with at least one of the above described tape reel ( ) and the magnetic tape ( ). Owing to the above described structure, it is possible to provide the tape reel, the magnetic tape and the magnetic tape cassette in which dropout and output variation are restrained and irregular winding can be prevented.