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:
Mar. 30, 1993
Filed:
Nov. 08, 1989
Nobuyuki Adachi, Kanagawa, JP;
Naoshi Sugiyama, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A method for initializing a magneto-optial disk comprises the steps of positioning at least one magneto-optical disk in a coil, wherein the length of said coil is shorter than the diameter thereof, so that the direction of the thickness of the magneto-optical disk coincides with the axial direction of the coil, and applying a predetermined pulsed current to the coil in order to generate an instantaneous magnetic field. The pulsed current is generated by a device comprising a charging circuit which charges a capacitor, and a discharging circuit, which applies a current to the coil, said current being generated by discharging the capacitor. A lifter supports the magneto-optical disk and conveys the magneto-optical disk in the direction of the thickness thereof in order to position it in the coil.