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:
Jan. 13, 2009
Filed:
May. 11, 2007
Toshiyuki Hirose, Kanagawa, JP;
Hideki Nonoyama, Kanagawa, JP;
Osamu Nakamura, Kanagawa, JP;
Akira Itou, Kanagawa, JP;
Yoshinori Saito, Kanagawa, JP;
Toshiyuki Hirose, Kanagawa, JP;
Hideki Nonoyama, Kanagawa, JP;
Osamu Nakamura, Kanagawa, JP;
Akira Itou, Kanagawa, JP;
Yoshinori Saito, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
Disclosed herein is a helical scan type magnetic tape reproduction apparatus, including: a helical scan type reproduction head capable of moving in the track widthwise direction by displacement of said actuator itself; target time decision means for measuring a period of time from a reference point of time with regard to each of a plurality of markers recorded in a dispersed relationship at predetermined positions on the tracks in advance to the marker by a predetermined number of times, averaging the measurement time periods of the markers and storing the average time periods; and tracking control means for measuring actual time periods from the reference time points with regard to the markers and performing updating control of a control voltage to be applied to said actuator for said reproduction head in accordance with time information of the differences between the target time periods and the actual time periods.