Abstract: A flexographic printing cylinder (10, 40) includes a cylinder body (20) made of a carbon fiber composite material and carrying a printing pattern on its peripheral surface (34), the printing pattern being formed by a polymer jacket layer (36) that is formed integrally with the cylinder body (20).

Abstract: A method for flexographic multi-color printing, wherein a print medium web is passed continuously through a flexographic printing press having at least two ink units, each ink unit including a printing cylinder, an anilox roller and an ink sup-ply system adapted to supply liquid ink of a specific color to the anilox roller, wherein the inks supplied in the different ink units differ in both, color and mass density, the method including the steps of mounting, in at least one of the ink units, an anilox roller having a larger diameter than the anilox roller of another one of the at least two ink units, and during printing, supplying the ink with the largest mass density to the anilox roller having the larger diameter.

Abstract: Printing machine having at least one impression cylinder (16), characterised in that the impression cylinder (16) has a cylinder body (44) made of a material which, in circumferential direction of the impression cylinder (16) has a linear thermal expansion coefficient of less than 2×10?6 K?1. The material may be a composite material, for example, a material containing carbon fibers, in particular a synthetic resin reinforced with carbon fibers.

Abstract: A method for shifting a doctor blade in its longitudinal direction, the doctor blade being set against a cylinder of a printing machine, wherein the shift movement of the doctor blade is such that, for most of the time of the print operation, the shift velocity of the doctor blade is in a range from 0 to 0.1 m/s, and a printing machine having a doctor blade assembly, including a doctor blade arranged to be set against a cylinder, and a shift mechanism for shifting the doctor blade in its longitudinal direction, such that the shift mechanism is adapted to execute the method.

Abstract: Printing machine with a machine frame (10) and at least two cylinders (16, 20) which cooperate during printing, and which are mounted in a framing (12, 14; 24) formed by the machine frame (10). The framing (12, 14; 24) includes a material which has, at least in a direction transverse to the axes of rotation on the cylinders (16, 20), a linear thermal expansion coefficient that is less than 2×10?6 K?1. The material can be a composite material, particularly a carbon fiber reinforced plastic.

Abstract: A method of manufacturing an anilox roller, in particular for a flexographic printing press, the anilox roller comprising a cylindrical core and a sleeve detachably held on the core and having at its surface an anilox layer with a grid pattern of pits, including the steps of mounting the sleeve on the core, and then forming the anilox layer on the sleeve.

Abstract: Gravure printing cylinder with a block carrier (12) having a metallic gravure layer (24) applied to its peripheral surface, with the block carrier being a self-supporting sleeve (12) made of carbon fiber composite material and supported on disks (14).

Abstract: A gravure printing machine having a device (14, 16) for applying ink onto a printing cylinder (10), including an ink supply system (16); wherein a stripping device (14) adapted to strip-off a layer of air that has been entrained by the printing cylinder (10) is arranged at the periphery of the printing cylinder (10) in relation to the ink supply system (16) in such a manner that the printing cylinder (10) will not come into substantial contact with air in a range between the stripping device (14) and the ink supply system.

Abstract: A method for shifting a doctor blade in its longitudinal direction, the doctor blade being set against a cylinder of a printing machine, wherein the shift movement of the doctor blade is such that, for most of the time of the print operation, the shift velocity of the doctor blade is in a range from 0 to 0.1 m/s, and a printing machine having a doctor blade assembly, including a doctor blade arranged to be set against a cylinder, and a shift mechanism for shifting the doctor blade in its longitudinal direction, such that the shift mechanism is adapted to execute the method.

Abstract: Printing machine with a machine frame (10) and at least two cylinders (16, 20) which cooperate during printing, and which are mounted in a framing (12, 14; 24) formed by the machine frame (10). The framing (12, 14; 24) includes a material which has, at least in a direction transverse to the axes of rotation on the cylinders (16, 20), a linear thermal expansion coefficient that is less than 2×10?6 K-1. The material can be a composite material, particularly a carbon fiber reinforced plastic.

Abstract: Printing machine having at least one impression cylinder (16), characterised in that the impression cylinder (16) has a cylinder body (44) made of a material which, in circumferential direction of the impression cylinder (16) has a linear thermal expansion coefficient of less than 2×10?6 K?1. The material may be a composite material, for example, a material containing carbon fibers, in particular a synthetic resin reinforced with carbon fibers.

Abstract: Multiple-stand photogravure machine with a first (10) and at least an additional printing unit (12a, 12b), each containing an impression roller (32, 52) and a driven print cylinder (34, 54), characterized in that in the at least one additional printing unit (12a, 12b) the impression roller (52) is provided with a regulated drive (56) and is in contact with the printable material (16) such that it can sustain a web velocity of the printable material (16) different from the circumferential speed of the adjoining print cylinder (54).

Abstract: An engraved ink transfer cylinder for a flexographic printing press, wherein the roller body (12) is clamped detachably on a continuous axle (22) and surrounds this axle (22) at a distance.

Abstract: A flexographic printing press with a back-pressure cylinder (10) and at least one inking unit (12, 14, 16), which has an exchangeable printing cylinder (20), which can be placed against the back-pressure cylinder (10), an engraved ink transfer cylinder (24; 38), which can be placed against the printing cylinder and a chamber doctor blade (26), which can be placed against engraved ink transfer cylinder, wherein a washing cylinder (34) is constructed to be inserted in the inking unit (12, 14, 16) instead of the printing cylinder (20) and to apply cleaning liquid to the surface of the back-pressure cylinder (10).

Abstract: A method of exchanging a printing cylinder sleeve in a printing machine, which printing machine comprises a central cylinder and a plurality of ink units adapted to be adjusted against the central cylinder, each ink unit comprising a plate cylinder having a printing cylinder sleeve mounted on a mandrel, and a detachable bearing for supporting the mandrel, the method comprising the following steps, which are performed while the printing machine is running: moving the plate cylinder away from the central cylinder to such an extent that a space formed between the plate cylinder and the central cylinder becomes large enough for gripping the printing cylinder sleeve, detaching the bearing, and withdrawing the printing cylinder sleeve axially from the mandrel.

Abstract: A printing machine with several printing units (10), which are arranged in a row and through which a printing carrier sheet (12) passes and downstream from each of which a drying station is disposed, wherein the drying station (22) in each case is disposed at the periphery of an individual tempering roller (26), which supports the printing carrier sheet (12).

Abstract: A method of manufacturing an anilox roller, in particular for a flexographic printing press, the anilox roller comprising a cylindrical core and a sleeve detachably held on the core and having at its surface an anilox layer with a grid pattern of pits, comprising the steps of

Abstract: A printing cylinder with a cylinder core (10), on which a carbon fiber-containing casing (20) is disposed, wherein the casing (20) is self-supporting and held at a distance from the peripheral surface (18) of the cylinder core (10) by disks (22) disposed at the two ends.

Abstract: A method of exchanging a printing cylinder sleeve in a printing machine,

Abstract: A flexographic printing press with a back-pressure cylinder (10) and at least one inking unit (12, 14, 16), which has an exchangeable printing cylinder (20), which can be placed against the back-pressure cylinder (10), an engraved ink transfer cylinder (24; 38), which can be placed against the printing cylinder and a chamber doctor blade (26), which can be placed against engraved ink transfer cylinder, wherein a washing cylinder (34) is constructed to be inserted in the inking unit (12, 14, 16) instead of the printing cylinder (20) and to apply cleaning liquid to the surface of the back-pressure cylinder (10).