Gravure printing units for printing onto substrates by a gravure printing method

A gravure printing unit for printing onto substrate in a gravure printing method, the gravure printing unit comprising:

• a forme cylinder, which forme cylinder has, on a circumference of the forme cylinder, image-forming forme cylinder recesses;
• an inking unit for inking the image-forming forme cylinder recesses, the inking unit including a gravure inking cylinder, which gravure inking cylinder has, in a region of an outer cylindrical surface, gravure inking cylinder recesses that correspond to individual ones of the image-forming forme cylinder recesses;
• an inking device, by the use of which inking device the gravure inking cylinder recesses can be inked at an application point located on a circumference of the gravure inking cylinder, the inking device including an ink supply chamber;
• a second, relief inking cylinder, which cooperates with the gravure inking cylinder and which has, in a region of an outer cylindrical surface, ones of second, relief inking cylinder elevations, which ones of the second, relief inking cylinder elevations correspond to individual ones of the image-forming forme cylinder recesses on the circumference of the forme cylinder, and to the gravure inking cylinder recesses and raised areas, which ones of the raised areas correspond to areas of the image-forming forme cylinder recesses on the circumference of the forme cylinder;
• a retaining device on the inking device, the retaining device being located on at least a downstream side of the application point, in an operating direction of rotation of the gravure inking cylinder that comprises the gravure inking cylinder recesses, the retaining device being configured as a doctor blade, which doctor blade is located on a downstream side, in an operating direction of rotation of the gravure inking cylinder, of the ink supply chamber, which doctor blade, in an operating position of the inking device, is in physical contact with the outer cylindrical surface of the gravure inking cylinder, and by the use of the doctor blade, printing ink one of lying on, and previously applied to non-engraved regions of the outer cylindrical surface of the gravure inking cylinder at the application point, and before contact of the gravure inking cylinder with the second, relief inking cylinder can be removed;
• an inking unit frame, the inking unit frame having a first inking unit frame section including first inking unit frame section side parts, the gravure inking cylinder, the inking device for the gravure inking cylinder and the ink retaining device being connected to the first inking unit frame section side parts of the first inking unit frame section;
• one of a printing unit frame and a second inking unit frame section of the inking unit frame, the first inking unit frame section being movably mounted with respect to one of the printing unit frame and the second inking unit frame section and being positioned by a first positioning drive, the inking device being mounted, coupled to the gravure inking cylinder in the first inking unit frame section wherein, when the gravure inking cylinder is moved radially, by movement of the first inking unit frame section with respect to the one of the printing unit frame and the second inking unit frame section, the inking device is moved along with the gravure inking cylinder and whereby a radial relative position between the gravure inking cylinder and the retaining device is maintained;
• and at least one of
• wherein the gravure inking cylinder, and the first inking unit frame section side parts of the first inking unit frame section that supports the inking device are arranged, on both sides on bearing rings, which bearing rings are supported eccentrically in one of the printing unit frame or the second inking unit frame section, and
• wherein the first inking unit frame section side parts carrying the gravure inking cylinder are mounted for linear movement with respect to one of the printing unit frame or the second inking unit frame section, and
• wherein joint movement of the first inking unit frame section side parts can be brought about by the first positioning drive embodied as one of an electric motor or a pressurized medium-actuated piston/cylinder system, and
• wherein an adjustable stop, that limits movement in a throwing-on direction of the first inking unit frame section is provided.