Abstract: A driving device for a print head including printing mechanism actuated at predetermined times for marking characters on a data carrier carried by a print roll, comprising motion converting mechanism comprising a housing including an interior continuous gear path, said housing being coupled to said print head; said gear path comprising a pair of opposing straight path portions substantially parallel to the axis of said print roll; said straight path portions being joined, at each end thereof, by respective curved path portions; rotatable pinion mechanism in continual engagement with said gear path; said pinion mechanism being coupled to the shaft of a motor driving mechanism; said straight path portions being mutually separated by a distance greater than the outside diameter of said pinion mechanism and said curved path portions being mutually separated by a distance substantially greater than the distance separating said straight path portions; rotary motion of said pinion mechanism being converted to recipr

Abstract: A matrix print head comprising a plurality of electromagnets each having an associated armature; a plurality of elongated print elements having ends adapted for printing markings on a data carrier; each of said print elements being associated with an armature; each of said print elements including a straight-line portion substantially perpendicular to said data carrier; said print element straight line portions being parallel to each other and being disposed in the same plane each of said print elements including an armature-engaging portion for resiliently maintaining its associated armature against its associated electromagnet, each of said print element armature-engaging portions permitting its associated armature to pivot about a first surface of its associated electromagnet whenever said electromagnet is energized, whereby the associated print element is thereby moved in a direction parallel to the straight-line portion thereof to thereby permit a marking on said data carrier to be printed.