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. 19, 2009
Filed:
Aug. 02, 2005
Motoya Miura, Ibaraki, JP;
Yasuo Inugai, Ibaraki, JP;
Shigeru Yasuda, Ibaraki, JP;
Shihoko Takashima, Ibaraki, JP;
Sadamu Kuse, Ibaraki, JP;
Motoya Miura, Ibaraki, JP;
Yasuo Inugai, Ibaraki, JP;
Shigeru Yasuda, Ibaraki, JP;
Shihoko Takashima, Ibaraki, JP;
Sadamu Kuse, Ibaraki, JP;
Hitachi Maxell, Ltd., Ibaraki-shi, JP;
Abstract
In a single-reel type tape cartridge of a servo tracking system in which signal recording is performed, a tape reel capable of eliminating edge projection during tape winding and achieving high recording density of a magnetic tape and a magnetic tape cartridge for housing the tape reel is provided. The tape reel is provided with a cylindrical hub around which the magnetic tape is wound and a pair of upper and lower flanges. The average value of the thickness of a reference flange that receives the tape edge of the magnetic tape during tape winding is set greater than the average value of the thickness of the opposite flange. The tape receiving surface of the reference flange is formed into an inclined surface, and three or more air escape recess portions are formed on the tape receiving surface. The depth of each air escape recess portion is set not smaller than 0.05 mm and not greater than 0.40 mm. The occupation area of all the air escape recess portions is set to 30% to 80% of the total area of the reference flange. Such tape reel is housed in a magnetic tape cartridge.