Druckvorrichtung

A multicolor printing machine for printing on frustoconical or cylindrical articles has a turret carrying article-supporting mandrels which are indexed alternately at printing stations and drying stations. The mandrels are rotated in synchronism with printing cylinders at the printing stations by two bevel gears rotatable in unison about the rotational axis of the turret, the mandrels and cylinders being rotatable about axes substantially radial to the turret axis and the distance between the bevel gears being adjustable to accommodate different sizes of mandrels and printing cylinders. Each printing cylinder is located in position on its drive shaft by axial and radial abutments adjustable to correct any misalignment. During printing the inking mechanism is driven by the printing cylinders, but when the machine is stopped the inking mechanism is separated from the cylinders and driven independently to prevent drying of the ink on the inking rollers. During printing each article is held onto the mandrel by vacuum. After printing is completed, the vacuum is released, the article is nudged by a roller during rotation of the turret to loosen its grip on the mandrel, and the article blown off by compressed air.