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. 12, 2003
Filed:
Oct. 12, 2001
Hiroyuki Kiso, Miyagi, JP;
Sony Corporation, , JP;
Abstract
In an inner surface of a lower flange of the magnetic tape reel, 6 concave portions each shaped in nearly as isosceles triangle are made formed at even angle intervals of 60 degrees with their circumferential cross-section area being larger as approaching to a hub. When a magnetic tape is wound on the hub, air which exists between a tape-winding surface of the hub or the tape already wound and the tape to be wound further is guided to the concave portions, and an amount of wound-in air becomes less in the inner side and large in the outer periphery. Consequently, a pressure of winding the tape tight at the outer periphery does not reach the inner side, so that winding irregularities or deformation of the tape do not occur.