Abstract: A flexographic printing machine, especially for flexographic web printing, has at least one printing unit. The printing unit comprises a printing cylinder or an endless printing belt drawn on round a back-up cylinder and a tension roller, an impression cylinder, an engraved roller for transferring the ink to the printing cylinder or to the printing belt, and an ink drier. A paper web runs through all the printing units. Incorporated in each printing unit is a working engraved roller, which can be uncoupled from a drive shaft of the flexographic printing machine during the operation of the latter, and at least one stand-by engraved roller which can be connected automatically in exchange during the set-up time.

Abstract: A flexographic printing machine, especially for flexographic web printing, has at least one printing unit. Such a printing unit comprises an endless printing band drawn on round a back-up cylinder and a tension roller, an impression cylinder, an engraved roller transferring the ink to the printing cylinder or to the printing belt, and an ink drier. A paper web runs through all the printing units.In each printing unit, the bearings of the impression cylinder are fastened rigidly to the machine frame, whereas the bearings of the back-up cylinder and those of the tension roller are arranged displaceably on it, a tension rod keeping a distance (a) between the back-up cylinder and the tension roller constant.