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:
Jul. 17, 1979
Filed:
Feb. 03, 1978
Applicant:
Inventor:
Norio Kokaji, Tokyo, JP;
Assignee:
Iwatsu Electric Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G / ; G11B / ;
U.S. Cl.
CPC ...
346 741 ; 358301 ; 360 41 ;
Abstract
Disclosed is a method wherein, in order to prevent background stains in the conventional NRZ system latent image recording method for Magnetography, the latent image recording is effected in such a manner that, in response to a black color representation signal, the direction of the magnetizing field along a generated magnetizing track is periodically reversed, while in response to a white color representation signal, a saturation magnetizing field of a uniform predetermined polarity is applied to adjacent tracks lying in a white region of the signal.