Abstract: A device for printing objects, such as cups from synthetic material. The objects are received so that they can be contacted by a printing roller, which cooperates with a plurality of printing plates. The printing plates are mounted on printing cylinders and may be supplied with colored ink by a plurality of inking units. The inking units include an ink-duct roller, which is engaged by an ink-duct, as well as a number of further rollers. The ink-duct is slidably supported and biased toward the ink-duct roller and includes a bottom extending to the ink-duct roller and side walls having two rolls which engage the ink-duct roller.