A device for aligning magnetic or magnetizable particles that are contained in a coating medium (06) that is applied to one side of a web-format or sheet-format substrate (02), said device having a magnetic cylinder (33), which is arranged in the transport path of the substrate (02) to be conveyed and which has, in the region of its outer circumference, a plurality of devices (34) that induce a magnetic field, i.e. magnetic devices (34), wherein some or all of the magnetic devices (34) each comprise a magnet (44) that is rotatable by an associated motor (46), wherein the magnetic cylinder (33) is arranged rotatably in frame walls (38;
- 39) of a frame, characterized in that at least one transducer (63) is provided for the contactless transmission of electric energy and/or of control signals from the outside into or onto the rotating magnetic cylinder (33) and comprises a transducer part (64) that is fixed to the frame and a transducer part (66) that is fixed to the cylinder during operation, and in that a bus system (73;
- 74) is provided for the contactless transmission of signals to the transducer part (66) that is fixed to the cylinder.