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:
Aug. 09, 1988
Filed:
Apr. 01, 1987
Applicant:
Inventor:
Masaaki Utsui, Kanagawa, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
295272 ; 360135 ;
Abstract
A method of making a magnetic recording medium comprises a first step of polishing a surface of a strip-like magnetic recording medium composed of a substrate and a magnetic layer formed on a surface of the substrate by coating a magnetic material onto the surface of the substrate and drying the coated magnetic material, a second step of inspecting the polished surface of the magnetic recording medium for defects, and a third step of punching out the magnetic recording medium, on which the inspection for defects is finished, into a predetermined shape. The first step, the second step and the third step are carried out on the continuous strip-like material.