DEVICE AND METHOD FOR MAGNETICALLY TRANSFERRING INDICIA TO A COATING COMPOSITION APPLIED TO A SUBSTRATE

摘要

There is described a device (10) and method for magnetically transferring indicia to a coating composition (P), such as an ink or varnish, applied to at least a part of the surface of a substrate (S), the coating composition (P) comprising at least one type of magnetic or magnetizable particles. The device (10) comprises a body (20) subjected to a magnetic field generated by appropriate electromagnetic means, which body (20) carries determined indicia in the form of engravings (21 a, 21 b, 21 c; 211, 212) on a surface of the body (20), which engravings (21 a, 21 b, 21 c; 211, 212) influence orientation of field lines of the magnetic field. The body (20) comprises at least one layer (21 ) of material of high magnetic permeability in which the engravings (21 a, 21 b, 21 c; 211, 212) are formed. In unengraved regions of the layer (21 ) of material of high magnetic permeability, the field lines of the magnetic field extend substantially parallel to the surface of the body (20) inside said layer (21 ) of material of high magnetic permeability.