Abstract: A method of manufacturing a mark on a packaging material, the method comprising the following steps: Providing the packaging material, which comprises at least one pre-printed element at a pre-defined position; Removing the pre-printed element in pre-defined sections in a marking station, so that the removed sections reflect a negative of the mark to be manufactured; Detecting a reference geometry of the pre-printed element and a reference geometry of the manufactured negative of the mark; Determining a geometric relationship of the detected reference geometries; Evaluating, if the determined geometric relationship matches a pre-defined geometric relationship; and if it matches, manufacturing subsequent marks under removal of the pre-printed element in the same pre-defined sections; or if it does not match, manufacturing subsequent marks under adjustment of the pre-definition of the sections, wherein the pre-printed element is removed.

Abstract: A method of manufacturing a mark on a packaging material, the method comprising the following steps: Providing the packaging material, which comprises at least one pre-printed element at a pre-defined position; Removing the pre-printed element in pre-defined sections in a marking station, so that the removed sections reflect a negative of the mark to be manufactured; Detecting a reference geometry of the pre-printed element and a reference geometry of the manufactured negative of the mark; Determining a geometric relationship of the detected reference geometries; Evaluating, if the determined geometric relationship matches a pre-defined geometric relationship; and if it matches, manufacturing subsequent marks under removal of the pre-printed element in the same pre-defined sections; or if it does not match, manufacturing subsequent marks under adjustment of the pre-definition of the sections, wherein the pre-printed element is removed.

Abstract: The disclosure relates to an apparatus for flexographic printing of a web of packaging material. The apparatus has an anilox roll which is rotary in an ink pan or chamber for picking up and transferring printing ink to an impression cylinder which is rotary adjacent the anilox roll and forms, together with a counter pressure cylinder rotary adjacent the impression cylinder, a nip through which the web is led for receiving printing ink from the impression cylinder. In order to prevent printing ink from drying and adhering to the anilox roll, the apparatus displays a spray- or shower device through which a cleaning fluid for the printing ink is applied on the circumferential surface of the anilox roll.