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. 16, 1991
Filed:
Apr. 25, 1990
Toshiyuki Suzuki, Yokohama, JP;
Masanori Isshiki, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Abstract
A method for contact magnetic printing of recorded information is disclosed which comprises keeping in intimate mutual contact the magnetic surface of a recorded master magnetic recording medium and the magnetic surface of a blank slave magnetic recording medium which uses hexagonal ferrite magnetic particles as the magnetic material, controlling the temperature of the two-magnetic recording media so as to lower the coercive force of the slave magnetic recording medium relative to that of the master magnetic recording medium, and applying an external magnetic field thereto thereby causing the recorded information to be magnetically printed from the master magnetic recording medium to the slave magnetic recording medium. In accordance with this method, copies of pictures of high quality and sounds of highly desirable high-frequency characteristics can be produced by the contact magnetic printing technique using the slave magnetic recording medium possessing a coercive force equal to or greater than the coercive force of the master magnetic recording medium.