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:
Nov. 12, 1992
Koh Kamada, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A magnetic recording medium comprising a non-magnetic support having on at least one side thereof at least one magnetic layer, in which the magnetic layer comprises a binder having dispersed therein a ferromagnetic powder and the non-magnetic support has a coarse projection density of not more than 400 per 500 mm.sup.2, a surface roughness (Ra) of from 0.02 to 0.07 .mu.m (cut-off value: 0.25 mm), and a thermal shrinkage of not more than 1.0% when preserved at 100.degree. C. for 4 hours. The magnetic recording medium has satisfactory sensitivity and frequency characteristics, freedom from output variation in the high-frequency region, and excellent running properties at ordinarily temperature and ordinary humidity with a reduced rate of running stop.