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. 07, 1989
Filed:
Oct. 16, 1987
Applicant:
Inventor:
Takeshi Okauchi, Chigasaki, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 68 ; 360 27 ;
Abstract
A magnetic recording and reproducing apparatus has a function of recording data on a control track of a magnetic tape by varying a duty cycle of a control pulse signal which is recorded on the control track. The apparatus stops a data recording operation when it is detected that a tape speed mode is changed from a standard play mode to an extended play mode or vice versa, so as to minimize dropout of positive polarity pulses of a reproduced control pulse signal after the tape speed mode is changed and also minimize erroneous recording of data.