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:
Feb. 27, 1990
Filed:
Nov. 03, 1987
Mitsuhiro Otokawa, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A rotary head type reproducing apparatus wherein, three rotary heads are arranged to be capable of simultaneously tracing different parts of many parallel tracks formed on a record bearing medium, the parts differing from each other both in the transverse and longitudinal directions of the tracks; among the three heads, a first head is positioned in the middle part of each track in the direction of the width thereof; a first tracking error signal is formed to represent a level difference between pilot signals reproduced by the first head from second and third tracks adjoining both sides of a first track which is being traced by the first head; a second tracking error signal is formed to represent a level difference between pilot signals reproduced from the second and third tracks by second and third heads which are other than the first head; and tracking control is accomplished by using both the first and second tracking error signals.