Nonerasable Magnetic Encoding
Original Publication Date: 1978-Aug-01
Included in the Prior Art Database: 2005-Feb-21
A magnetic tape can be provided that is encoded during processing, resulting in a magnetic media that cannot be erased. A ferromagnetic material (gamma ferric oxide, for example) is applied to a substrate in the form of discretely spaced bars or lines. The resultant bar pattern is then permanently sealed in place with the application of an overlay. After passing a magnet over the tape surface, the tape can be read in the same manner as conventional magnetic tapes.