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:
Jun. 13, 1995
Filed:
Jun. 24, 1994
Eizo Tsunoda, Nagano, JP;
Kaoru Kawasaki, Nagano, JP;
Akihiko Seki, Nagano, JP;
Kazuyuki Shimazaki, Nagano, JP;
TDK Corporation, Tokyo, JP;
Abstract
A mixture containing a magnetic powder, a binder, and an organic solvent is kneaded by passing it through a twin-shaft continuous kneader while the shearing force applied to the mixture is varied by changing the set angle of paddles used. The temperature of the mixture is controlled to be higher than Tg and lower than the boiling point of the organic solvent when it passes through the maximum shearing force zone, and to be lower than the temperature of the mixture upon its passage through the maximum shearing force zone, preferably lower than Tg when it passes through zones other than the maximum shearing force zone. There is obtained a magnetic recording medium which has improved dispersion of magnetic powder and excellent electromagnetic properties as well as a low coefficient of friction and improved transport stability.