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:
Jan. 18, 1994
Filed:
Aug. 27, 1992
Applicant:
Inventors:
Ryota Uchiyama, Narita, JP;
Hiroyuki Endo, Saku, JP;
Isamu Kuribayashi, Saku, JP;
Shin-ichi Tezuka, Ichikawa, JP;
Tsuneo Kuwahara, Saku, JP;
Hideki Hirata, Kitasaku, JP;
Setsuko Shibuya, Saku, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428 64 ; 428 65 ; 428327 ; 428421 ; 428422 ; 4286 / ; 4286 / ; 4286 / ; 369283 ;
Abstract
A protective coating made of resin, preferably a radiation curable resin containing fluoroplastic fine particles having a low surface energy is provided in the form of the uppermost layer facing a magnetic head, thereby improving the frictional properties and durability of a magneto-optical disc that is used with a magnetic field modulation system in which the magnetic head comes in constant contact therewith.