Gravure printing units for printing onto substrate, printing press with such a gravure printing unit, ink transfer forme and method for setting up an inking unit cylinder comprised by a gravure printing unit

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

• a forme cylinder, which forme cylinder comprises, on an outer circumference of the forme cylinder an image-forming pattern of forme cylinder recesses;
• an inking unit usable for inking the image-forming pattern of forme cylinder recesses provided on the forme cylinder, said inking unit comprising a first inking unit cylinder, which first inking unit cylinder comprises a first inking unit cylinder body which one of is a can be mounted rotabably in the inking unit, which first inking unit cylinder comprises first inking unit cylinder recesses in a region of an outer cylindrical surface of the first inking unit cylinder and which first inking unit cylinder recesses correspond to the forme cylinder recesses on the forme cylinder;
• a second inking unit cylinder in the inking unit, and wherein the first inking unit cylinder forms a nip point downstream, in a direction of ink transport through the inking unit, with the second inking unit cylinder, which second inking unit cylinder comprises, on a circumference of the second inking unit cylinder, ones of ink-transferring elevations and raised areas;
• a circumferentially closed ink transfer forme sleeve on the outer circumferential surface of the first inking unit cylinder, and which carries the recesses on the first inking unit cylinder on an outwardly facing surface of the ink transfer forme sleeve on the outer circumference of the first inking unit cylinder in the form of the circumferentially closed ink transfer forme sleeve, wherein the ink transfer forme sleeve one of is and can be detachably arranged on the outwardly facing surface of the first inking unit cylinder, which first inking unit cylinder is temperature controllable;
• wherein the ink transfer forme sleeve includes a cover layer that has the first inking unit cylinder recesses on its outwardly facing surface and one of wherein a substrate layer one of directly and indirectly supports the cover layer, and wherein the cover layer having the first inking cylinder recesses is a ceramic layer;
• and
• wherein a material that forms the ceramic cover layer one of has a Vickers hardness VH of at least 800 HV 10 and a maximum porosity of 5%, and an elasticity according to Young of between 30 and 70 GPa, and a Poisson number of 0.20 to 0.30 Poisson, and a fracture toughness of 4.0 to 5.0 MPa*m1/2, and a tear resistance of at least 40 MPa and has a maximum thickness of 350 μm.

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

• a forme cylinder, which forme cylinder comprises, on an outer circumference of the forme cylinder an image-forming pattern of forme cylinder recesses;
• an inking unit usable for inking the image-forming pattern of forme cylinder recesses provided on the forme cylinder, said inking unit comprising a first inking unit cylinder, which first inking unit cylinder comprises a first inking unit cylinder body which one of is an can be mounted rotabably in the inking unit, which first inking unit cylinder comprises first inking unit cylinder recesses in a region of an outer cylindrical surface of the first inking unit cylinder and which first inking unit cylinder recesses correspond to the forme cylinder recesses on the forme cylinder;
• a second inking unit cylinder in the inking unit, and wherein the first inking unit cylinder forms a nip point downstream, in a direction of ink transport through the inking unit, with the second inking unit cylinder, which second inking unit cylinder comprises, on a circumference of the second inking unit cylinder, ones of ink-transferring elevations and raised areas;
• a circumferentially closed ink transfer forme sleeve on the outer circumferential surface of the first inking unit cylinder, and which carries the recesses on the first inking unit cylinder on an outwardly facing surface of the ink transfer forme sleeve on the outer circumference of the first inking unit cylinder in the form of the circumferentially closed ink transfer forme sleeve, wherein the ink transfer forme sleeve one of is and can be detachably arranged on the outwardly facing surface of the first inking unit cylinder, which first inking unit cylinder is temperature controllable;
• wherein the ink transfer forme sleeve includes a cover layer that has the first inking unit cylinder recesses on its outwardly facing surface and wherein a substrate layer one of directly and indirectly supports the cover layer, and wherein the cover layer having the first inking cylinder recesses is a ceramic layer;
• and
• one of wherein the substrate layer is made of a carbon fiber material and wherein the material of which the substrate layer is made has one of a modulus of elasticity in the circumferential direction of less than 65 GPa and a layer thickness of less than 5 mm.

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

• a forme cylinder, which forme cylinder comprises, on an outer circumference of the forme cylinder an image-forming pattern of forme cylinder recesses;
• an inking unit usable for inking the image-forming pattern of forme cylinder recesses provided on the forme cylinder, said inking unit comprising a first inking unit cylinder, which first inking unit cylinder comprises a first inking unit cylinder body which one of is an can be mounted rotabably in the inking unit, which first inking unit cylinder comprises first inking unit cylinder recesses in a region of an outer cylindrical surface of the first inking unit cylinder and which first inking unit cylinder recesses correspond to the forme cylinder recesses on the forme cylinder;
• a second inking unit cylinder in the inking unit, and wherein the first inking unit cylinder forms a nip point downstream, in a direction of ink transport through the inking unit, with the second inking unit cylinder, which second inking unit cylinder comprises, on a circumference of the second inking unit cylinder, ones of ink-transferring elevations and raised areas;
• a circumferentially closed ink transfer forme sleeve on the outer circumferential surface of the first inking unit cylinder, and which carries the recesses on the first inking unit cylinder on an outwardly facing surface of the ink transfer forme sleeve on the outer circumference of the first inking unit cylinder in the form of the circumferentially closed ink transfer forme sleeve, wherein the ink transfer forme sleeve one of is and can be detachably arranged on the outwardly facing surface of the first inking unit cylinder, which first inking unit cylinder is temperature controllable;
• wherein the ink transfer forme sleeve includes a cover layer that has the first inking unit cylinder recesses on its outwardly facing surface and wherein a substrate layer one of directly and indirectly supports the cover layer, and wherein the cover layer having the first inking cylinder recesses is a ceramic layer;
• and
• wherein the ink transfer forme sleeve comprises, between the cover layer that has the first inking unit cylinder recesses and the substrate layer, a metallic intermediate layer, which is one of made of aluminum and has a layer thickness of 0.10 to 0.35 mm.