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. 23, 1994
Filed:
May. 22, 1992
Applicant:
Inventors:
Ryosuke Isobe, Hino, JP;
Takahiro Mori, Hino, JP;
Assignee:
Konica Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428141 ; 428212 ; 428217 ; 428218 ; 428328 ; 4286 / ; 4286 / ; 4286 / ; 428900 ;
Abstract
A magnetic recording medium is disclosed. The medium has a Vickers hardness of said magnetic layer being within a range from 40 to 170, an amount of plastic deformation of said magnetic layer being in a range of 0.3-0.9 .mu.m, and satisfies the relation of (A+200 B).gtoreq.180 wherein A is the value of said Vickers hardness and B is plastic deformation. The magnetic recording medium of the invention provides no contamination of calender rolls caused in the course of manufacturing thereof, and has running stability which is not affected by environmental conditions and which reduces clogging on a magnetic head.