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. 25, 2003
Filed:
May. 10, 2002
Applicant:
Inventors:
Akio Momoi, Tokyo, JP;
Motohiko Shima, Saku, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 2/3107 ;
U.S. Cl.
CPC ...
G11B 2/3107 ;
Abstract
There is provided a tape cartridge which is capable of reliably preventing dropout of a magnetic tape without lowering durability. A tape cartridge includes a cartridge body formed by a pair of cartridge halves, one of the cartridge halves being formed with an insertion hole permitting insertion of a driving shaft of a record/playback apparatus, and a tape reel formed by a hollow cylindrical hub and a pair of flanges, the tape reel being accommodated within the cartridge body, with a tape wound around the hub. A center line average height Ra of a surface of the hub is defined to be not smaller than 0.005 &mgr;m and not larger than 0.04 &mgr;m.