An assembly for magnetically recording a precise-encoded message on a document having a magnetic recording track (An Assembly for Magnetically Writing a Precision-Encoded Message on a Document Bearing on a Magnetic Writing Track)

摘要

The assembly of the present invention can be applied to the case where the document 1 includes not only the recording track but also a pre-coded synchronization track in which the recording signal can be synchronized.;Thus, the present assembly includes a magnetic recording head E in which a recording winding is inserted and a magnetic read head Lh in which the pre-coded track is read and a read winding is inserted. Furthermore, the present assembly includes an auxiliary magnetic head (Ta) in which an electric wire is inserted, and the head has a pre-encoded synchronization track symmetrically disposed with respect to the recording head (E) with respect to the shaft (5) And the coils of the auxiliary head Ta receive the same current passing through the windings as they each ensure that the synchronization head Lh produces a magnetic field of equal magnitude in the opposite direction in the air gap 13 .