Apparatus for erasing information recorded on an information recording medium by applying light and a magnetic field over a plurality of recording tracks
AssigneeKabushiki Kaisha Toshiba
InventorKoji Kaburagi
Life of this patent
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Abstract
An information recording medium processing apparatus including a light radiating device that uniformly radiates a light beam on a plurality of recording tracks of an information recording medium and a magnetic field applying unit that applies a magnetic field to a region of the information recording medium irradiated with the light beam, thereby simultaneously erasing information recorded in the plurality of recording tracks.
Claims4
A processing apparatus for erasing information recorded on an information recording medium having a plurality of recording tracks on which the information is recorded by applying light and a magnetic field, comprising:
- magnetic field applying means for applying the magnetic field to said plurality of recording tracks of said information recording medium, the magnetic field applying means including a substantially U-shaped member having two extending portions between which the information recording medium is positioned;
- and
- light radiating means for radiating the light on at least two tracks of said plurality of recording tracks having the magnetic field applied thereon by said magnetic field applying means, the light radiating means being positioned between the two extending portions of the magnetic field applying means and radiating the light on said at least two tracks simultaneously.
Dependencies are inferred from the claim text.