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:
May. 21, 1991
Filed:
Mar. 25, 1988
Yutaka Ogasawara, Yokohama, JP;
Wataru Sakagami, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An information recording method for recording information on one of a plurality of tracks provided in parallel with each other on an information recording medium while performing a tracking servo operation has a characteristic that when an abnormality of the tracking servo operation is generated during the recording of information on a track, information the same as the above-mentioned information is recorded again on a track which is positioned at least two tracks ahead of the one track. An information recording apparatus for performing the above method includes: a recording device for recording information on one of the tracks, a shifting device for shifting the recording device onto another track; a tracking servo device for performing a tracking servo of the recording operation with respect to a track; a detecting device for detecting abnormality of the tracking servo operation; and a control arrangement for causing the shifter to move the recording device to a new track positioned at least two tracks ahead of the one track when the detecting device detects abnormality of the tracking servo operation, whereby information, the same as the information being recorded when the abnormality is generated, is recorded again on the new track.