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:
Oct. 06, 1992
Filed:
Dec. 11, 1990
Applicant:
Inventor:
Masahiro Makino, Miyagi, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360132 ; 242199 ;
Abstract
A tape cassette arranged such that coarse surface areas are formed on guide surfaces used to guide a magnetic tape along the external surface of the front side wall portion formed inside of a cassette lid and that the coarse surface areas are gradually reduced toward the seam 19 of upper and lower parts. Thus, when the upper and lower parts are molded, the upper and lower parts can be removed from the metal molds with ease. Also, electrification can be prevented from occurring in the magnetic tape or in the upper and lower parts when the magnetic tape is transported along the guide surfaces.