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:
Apr. 04, 1989
Filed:
Aug. 24, 1987
Toshio Shirai, Kanagawa, JP;
Makoto Ando, Tokyo, JP;
Keisuke Unno, Tokyo, JP;
Toshiharu Kobayashi, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A magnetic tape transfer printing apparatus including a drum mounted for rotation. A master magnetic tape having information recorded thereon is held in contact with a slave magnetic tape on a portion of the circumferential surface of the drum. A magnetic transfer bias field is applied to transfer the information from the master magnetic tape onto the slave magnetic tape. The drum contains a high-permeability magnetic material at least in the circumferential surface. This is effective to decrease the lateral component of the bias magnetic field and increase the vertical component of the bias magnetic field, thereby minimizing the degree of demagnetization of the master magnetic tape during the transfer printing process.