Magnetic recording medium and the method of manufacturing...

Coating processes – Magnetic base or coating

Reexamination Certificate

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C427S130000, C428S835000

Reexamination Certificate

active

10830968

ABSTRACT:
A magnetic recording medium and a manufacturing method for making it are disclosed. The method facilitates preventing the lubricant deposited on the end face of the magnetic recording medium from migrating onto the major surfaces thereof. The lubricant deposited on an end face of a magnetic disk, which may migrate onto the major surfaces of the magnetic disk, is wiped off by the rotating magnetic disk with the lubricant deposited thereon, by spraying a solvent onto a wiping tape while feeding the wiping tape, and by pressing the wet wiping tape containing the solvent to the end face of the magnetic disk with a pad while the feeding of the wiping tape is discontinued. Alternatively, the lubricant deposited on the end face of a magnetic disk is solidified to deprive the lubricant of its fluidity by rotating the magnetic disk with the lubricant deposited thereon while irradiating it with ultraviolet radiation from a UV lamp through a slit opened in a shield on the lamp to the end face of the magnetic disk.

REFERENCES:
patent: 4823578 (1989-04-01), Coe et al.
patent: 2002/0043332 (2002-04-01), Itai et al.
patent: 57-94930 (1982-06-01), None
patent: 02-044519 (1990-02-01), None
patent: 5-151568 (1993-06-01), None
patent: 7-58545 (1995-03-01), None
patent: 8-321039 (1996-12-01), None
patent: 40-166328 (1998-06-01), None
patent: 2003-6849 (2003-01-01), None
patent: 2004-326880 (2004-11-01), None
English equivalent abstract for JP 40-166328, EAST.
Related co-pending U.S. Appl. No. 11/466,285; Kazuhiro Kusakawa et al.; “Magnetic Recording Medium and Method of Manufacturing The Same”; filed Aug. 22, 2006; Spec. pp. 1-15; Figs. 1-12.
Relevant portion of Austrian Search Report of corresponding patent application No. 200401907-1 with filing date of Apr. 6, 2004.

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