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. 10, 2004
Filed:
Sep. 12, 2001
Masashi Aoki, Kanagawa-ken, JP;
Fuji Photo Film Co., Ltd., Kanagawa-Ken, JP;
Abstract
A method of manufacturing a magnetic recording medium having a disc-shaped flexible slave medium accommodated in a case, onto which servo signals are effectively recorded by a magnetic transfer method with high quality. The method includes a slitting step for cutting an original sheet into discrete webs; a punching step for obtaining a disc-shaped slave medium; a thermo step for removing distortion; a burnishing step for smoothing a surface of the slave medium; a center core attachment step; a magnetic transfer step for performing a magnetic transfer while a master medium is allowed to be brought into close contact with one of the web and the slave medium; an assembly step for incorporating slave medium into the case; a cleaning step for cleaning a surface of the slave medium; a verifying step for checking the servo signals; and a packing step.