Multi-purpose silk-screen printing unit for turntable machines for the multi-colour silk-screen printing of containers with curved surfaces

摘要

A multi-purpose silk-screen printing unit for the multi-colour decoration of containers (4) having at least one cylindrical portion (40) and at least one coaxial frusto-conical portion (41), and being rotatably supported by a circumferential series of angularly equidistant radial mandrels (100) of a silk-screen printing machine of turntable type, this latter provided with stationary printing stations to which said containers are presented by said mandrels which at that moment are stationary, comprises at least one first screen (18) arranged to slide tangentially to the circumferential path followed by the mandrels and to apply a decoration (180) to said at least one cylindrical portion (40) of the container (4), and at least one second screen (21) arranged to slide parallel to said at least one first screen and to apply a decoration (210) to said at least one frusto-conical portion (41) of the container simultaneously with the application of the relative decoration by said at least one first screen, the travel strokes of which govern the travel strokes of said at least one second screen.