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:
Apr. 18, 1995
Filed:
Jan. 21, 1994
Katsumi Ryoke, Kanagawa, JP;
Yutaka Kakuishi, Kanagawa, JP;
Toshiyuki Kitahara, Kanagawa, JP;
Tetsuji Nishida, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A magnetic recording medium comprising a non-magnetic support having thereon a magnetic layer comprising a ferromagnetic powder and a binder resin is disclosed. The magnetic layer contains a first carbon black having a DBP absorption of from 40 to 120 ml/100 g and a second carbon black having a DBP absorption of from 140 to 200 ml/100 g. Both carbon black have an average particle size of from 5 to 35 m.mu.. The medium maintains a high output level and has excellent running stability. Therefore, the dropout due to abrasion caused by an increase in friction coefficient and output reduction due to head clogging, can be avoided.