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. 09, 1989
Filed:
Oct. 21, 1987
Applicant:
Inventors:
Kiyomi Ejiri, Odawara, JP;
Shigeo Komine, Odawara, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428141 ; 427131 ; 428336 ; 428694 ; 428900 ;
Abstract
A magnetic recording disk comprising a nonmagnetic support and magnetic recording layers provided on both surfaces of said support, said magnetic recording layers comprising a ferromagnetic metal powder dispersed in a binder, which is characterized in that: said disk has a thickness in the range of 20-60 .mu.m and a flexural stiffness in the range of 2.0-200 g.multidot.mm; and each of said magnetic recording layers has a center line average height of not more than 0.03 .mu.m.