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:
Oct. 16, 1984
Filed:
Mar. 10, 1983
Applicant:
Inventors:
Ryuji Sugita, Hirakata, JP;
Kenji Kanai, Neyagawa, JP;
Seishi Sasaki, Nishinomiya, JP;
Ken Takahashi, Suita, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427129 ; 427130 ; 427131 ; 427132 ; 427251 ; 4272557 ;
Abstract
In making magnetic recording media by vapor-depositing magnetic metal film containing Co-Cr with 70-90 weight % Co as host material on a high polymer substrate, with or without intermediate layer(s) inbetween, making the high polymer substrate run around a cylindrical can, condition is selected such that linear expansion coefficient of the substrate is 1.0.times.10.sup.-5 -2.9.times.10.sup.-5 /.degree.C. and temperature of the can surface is 150.degree.-300.degree. C.; thereby normal or inverse curling of the resultant recording medium is substantially eliminated.