Abstract: A printing unit of a printing press and a printing roller or an impression cylinder of a printing press is disclosed. The printing roller or the impression cylinder has a first and a second base element (1, 2) and a hollow cylinder (3) made of a fiber-reinforced material.

Abstract: A printing unit of a printing press has at least one printing couple including a form cylinder, a transfer cylinder, an inking couple, and possibly a dampening unit; wherein the circumference of the transfer cylinder is a whole-number multiple of the circumference of the form cylinder; an impression cylinder cooperates with the transfer cylinder of the printing to form a nip, through which a substrate to be printed can be conveyed; and intermeshing drive gears are assigned to the form cylinder and to the transfer cylinder. The inking couple can be driven by the transfer cylinder of the printing couple by way of intermeshing drive gears in such a way that the drive connection between the transfer cylinder and the inking couple of the printing couple is independent of the drive connection between the transfer cylinder and the form cylinder.

Abstract: A printing unit for a roll-fed printing press having at least two printing mechanisms, wherein a first printing mechanism imprints a first side of a web-shaped substrate and a second printing mechanism imprints a second side of the web-shaped substrate opposite to the first side. The first printing mechanism and second printing mechanism each have a form cylinder, a transfer cylinder, an inking unit, and preferably a dampening unit. The transfer cylinders of the first printing mechanism and the second printing mechanism roll on one another while forming a printing gap for the substrate to be imprinted. A main driving motor is associated with the first printing mechanism or the second printing mechanism. A braking motor is associated with the printing mechanism with which the main driving motor is not associated.

Abstract: A sleeve, in particular a rubber-blanket sleeve, for a printing press is disclosed. The sleeve having a construction which has at least two layers, having an inner layer which is configured as a carrier layer and an outer layer which is configured as a covering layer and serves for pressure transfer, the sleeve having a hollow-cylindrical design with a cylindrical inner surface and a cylindrical outer surface. The inner layer which is configured as a carrier layer is convexly or concavely curved on the radially outer side, a layer which adjoins the carrier layer having a curvature on a radially inner side which is complementary to the curvature of the radially outer side of the carrier layer.

Abstract: A driven component, in particular a printing couple or folding unit, of a printing press, having several rotating elements, in particular cylinders or rollers, wherein at least two rotating elements are assigned to intermeshing drive gears, is disclosed. The drive gear of a first rotating element, which meshes with the drive gear of a second rotating element, is assigned a co-rotating gear, which is connected to the drive gear of the first rotating element via at least one spring element or bending element, which extends in the axial direction of the first rotating element. The co-rotating gear can be rotated with respect to the drive gear in such a way in the circumferential direction that a meshing between the two intermeshing drive gears that is affected in principle by backlash can be kept free of backlash.

Abstract: A web press with at least one printing couple, where the at least one printing couple or each printing couple is provided with a form cylinder, a transfer cylinder, an inking couple, and preferably a dampening unit, and a transfer system is assigned to the transfer cylinder, and a printing form system is assigned to the form cylinder. The transfer system assigned to the transfer cylinder of the printing couple or each printing couple is constructed with several parts which are disposed along the axial direction of the transfer cylinder.

Abstract: An automated method is provided for carrying out a production change, which is specific to the printing plate, on a printing press. After a first print job is printed on a printing press, the printing of the first print job is stopped automatically after a predefined print run level has been reached or another termination criterion for the first print job has occurred. Parameters required for printing a second print job which follows the first print job are loaded automatically by the printing press. Before or after the parameters of the second print job are loaded, a printing plate change is automatically carried out on the printing press, thus achieving production readiness for the second print job. The second print job is then either started automatically, or a production readiness signal for the second print job is generated automatically.

Abstract: An automated method is provided for carrying out a production change, which is specific to the printing plate, on a printing press. After a first print job is printed on a printing press, the printing of the first print job is stopped automatically after a predefined print run level has been reached or another termination criterion for the first print job has occurred. Parameters required for printing a second print job which follows the first print job are loaded automatically by the printing press. Before or after the parameters of the second print job are loaded, a printing plate change is automatically carried out on the printing press, thus achieving production readiness for the second print job. The second print job is then either started automatically, or a production readiness signal for the second print job is generated automatically.

Abstract: A web-fed rotary offset press is disclosed. The press is designed for using sleeve technology, it being possible for sleeve-shaped rubber blankets to be pushed onto the rubber-covered cylinders in the axial direction. Finite printing plates are placed onto the plate cylinders in a conventional manner, it being possible to fix the ends of the finite plates in slots of the plate cylinders. Rubber-covered cylinders are used which have a double circumference, while the plate cylinders have a single circumference. As a result, the rigidity of the cylinder system is increased substantially, with the result that a stable web run and in-register printing are possible in wide machines over 1400 mm, without it being necessary for modifications to be performed on the cylinders or the compressibility or thickness of the rubber layers of the sleeves to be changed in the axial direction.

Abstract: A sleeve, in particular a rubber-blanket sleeve, for a printing press is disclosed. The sleeve having a construction which has at least two layers, having an inner layer which is configured as a carrier layer and an outer layer which is configured as a covering layer and serves for pressure transfer, the sleeve having a hollow-cylindrical design with a cylindrical inner surface and a cylindrical outer surface. The inner layer which is configured as a carrier layer is convexly or concavely curved on the radially outer side, a layer which adjoins the carrier layer having a curvature on a radially inner side which is complementary to the curvature of the radially outer side of the carrier layer.

Abstract: A non-flowing protective medium is applied in a finely distributed manner through a metering nozzle by means of blown air to the non-printing regions of at least one roll of an inking unit or damping unit and/or the non-printing regions of at least one transfer cylinder or forme cylinder, forming a thin-layer protective film. Ink is thereby prevented from drying out in non-printing regions of the rolls and cylinders of the printing unit, and the tack is thus kept at a low level, in order to reduce the risk of web breaks.

Abstract: A form cylinder is provided with a circumferential surface which is convexly curved in the axial direction, such that the convex profile, determined by calculation, of the circumferential surface varies in such a way that the diameter of the form cylinder is largest in the axial center and smallest at the lateral edges.

Abstract: A fiber-reinforced plastic base body is first of all provided with a coating of hard rubber or thermoplastic having a dispersed metal or ceramic content of 5% by volume to 80% by volume, and the coating is ground down to provide a smooth surface In a further step a layer of metal and/or ceramic, which has a printing function, is applied to the smooth surface, preferably by thermal spraying.

Abstract: A non-flowing protective medium is applied in a finely distributed manner through a metering nozzle by means of blown air to the non-printing regions of at least one roll of an inking unit or damping unit and/or the non-printing regions of at least one transfer cylinder or forme cylinder, forming a thin-layer protective film. Ink is thereby prevented from drying out in non-printing regions of the rolls and cylinders of the printing unit, and the tack is thus kept at a low level, in order to reduce the risk of web breaks.

Abstract: A forme cylinder is provided with a circumferential surface which is convexly curved in the axial direction, such that the convex profile, determined by calculation, of the circumferential surface varies in such a way that the diameter of the forme cylinder is largest in the axial center and smallest at the lateral edges.

Abstract: A fiber-reinforced plastic base body is first of all provided with a coating of hard rubber or thermoplastic having a dispersed metal or ceramic content of 5% by volume to 80% by volume, and the coating is ground down to provide a smooth surface In a further step a layer of metal and/or ceramic, which has a printing function, is applied to the smooth surface, preferably by thermal spraying.

Abstract: Large throw-off distances of the transfer cylinders in a double printing unit of a rotary printing machine operating on the rubber/rubber principle are achieved by enabling the two transfer cylinders to be set away from each other, and enabling the two form cylinders to be set away from the respective transfer cylinder. The form cylinder and the transfer cylinder of each printing unit have a drive connection via spur gears, the transfer cylinders are not in tooth engagement via their spur gears, and each printing unit has its own electric motor.

Abstract: Disclosed is a film roller in an inking unit of a rotary printing machine. The film roller is equipped with an internal cooling system to eliminate irregularities in the ink transfer to the film roller and to improve print quality.

Abstract: An arrangement for fastening a covering on a cylinder of a printing machine, the arrangement including a cylinder having at least one axially extending cylinder groove which defines a groove wall at an acute angle to an outer surface of the cylinder, and a covering including at least one flexible support plate having a leading flange and a trailing flange that are inserted into the cylinder groove so that the leading flange engages the groove wall and the trailing flange is adjacent the leading flange. A spindle is arranged in the cylinder groove so as to be rotatable between a release position and a clamping position, and a leaf spring is mounted on the spindle so as to press, in the clamping position of the spindle, the trailing flange and the leading flange against the groove wall.

Abstract: The invention relates to a web-fed rotary printing press having a plurality of double printing units in which each of the printing units of the double printing units work together in the blanket--blanket method and each has its own drive. Transfer cylinders of each printing unit are driven independently. To permit a rapid change in production, both upon recto and verso printing, the transfer cylinders of the disconnectable double printing units are separable by eccentric bushings or swingable levers such that a web which passes through the printing press is conducted between them without being printed.