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:
Feb. 05, 1980
Filed:
Nov. 17, 1977
Applicant:
Inventors:
Assignee:
Fuji Photo Film Co., Ltd., Minami-ashigara, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ;
U.S. Cl.
CPC ...
428213 ; 360134 ; 427128 ; 428220 ; 428212 ; 428329 ; 428337 ; 428900 ;
Abstract
In a magnetic recording tape having a total thickness of 4.0 to 14.5 microns, the base thickness to magnetic layer thickness ratio is from 2:3 to 3:2, the base Young's modulus to magnetic layer Young's modulus ratio is from 1:2 to 2:1 and the tensile strength at 0.5% elongation is .sqroot.d/16 Kg or more to the total thickness d (micron).