Abstract: A printing press includes a printing form cylinder, a blanket cylinder, an impression cylinder, an adjusting device for setting a printing pressure between the blanket cylinder and the impression cylinder, a control device for throwing the pressure of the blanket cylinder on and off relative to the impression cylinder and springs for producing bearer ring pressure between bearer rings of the printing form cylinder and bearer rings of the blanket cylinder. The springs are integrated into coupling links and are connected to at least one of the two devices in such a way that, as a result of the actuation of that device, the springs are also adjusted, in order to keep the bearer ring pressure at least substantially constant.

Abstract: A method for feeding sheets to a printing technology machine improves reliability of feeding sheets and reduces an acceleration time from a base speed to a production speed. The sheets are conveyed onto a feed table in shingled formation by a first drive and are individually and successively conveyed from the feed table to a first processing station of the machine by a second drive. The sheets are conveyed onto the feed table before an acceleration of the second drive to production speed is completed and the first drive is accelerated to the production speed when the processing station has reached the production speed.

Abstract: A device for clamping and tensioning an edge of a printing plate on a plate cylinder of a printing press includes a single actuating shaft for releasing clamping and tensioning forces. The actuating shaft has a control cam for releasing the tensioning forces and a control roller for releasing the clamping forces. A printing unit having the device and a printing press having the printing unit are also provided.

Abstract: A printing press includes a printing form cylinder, a blanket cylinder, an impression cylinder, an adjusting device for setting a printing pressure between the blanket cylinder and the impression cylinder, a control device for throwing the pressure of the blanket cylinder on and off relative to the impression cylinder and springs for producing bearer ring pressure between bearer rings of the printing form cylinder and bearer rings of the blanket cylinder. The springs are integrated into coupling links and are connected to at least one of the two devices in such a way that, as a result of the actuation of that device, the springs are also adjusted, in order to keep the bearer ring pressure at least substantially constant.

Abstract: A printing press includes a form cylinder, a blanket cylinder, an impression cylinder, an adjusting apparatus having at least one first actuating drive for setting a printing pressure between the blanket cylinder and the impression cylinder, and a tracking system for setting a printing pressure between the form cylinder and the blanket cylinder in dependence on the setting of the printing pressure between the blanket cylinder and the impression cylinder. The tracking system has at least one second actuating drive coupled to the at least one first actuating drive in terms of control technology through an electronic control device, in such a way that the form cylinder is adjusted automatically.

Abstract: A method and an apparatus for coupling or uncoupling a cylinder, in particular a plate or blanket cylinder, to or from a gear train of a printing press or for coupling and uncoupling the cylinder to and from an auxiliary drive, for example for service work or during changeover processes, includes firstly accelerating the auxiliary drive to a predefined rotational speed, then coupling the auxiliary drive to the cylinder and then uncoupling the cylinder from the main drive. A sheetfed rotary printing press having the apparatus is also provided.

Abstract: An apparatus for transporting a printing plate to or from a plate cylinder of a printing press includes a first, driven transport roller that is stationarily disposed and a second transport roller that is disposed so as to be movable in the direction of the first transport roller. The second transport roller is mounted so as to be pivotable about a pivot axis disposed perpendicularly to its axis of rotation, preferably by a ball and socket joint or a fork bearing.

Abstract: A device for clamping and tensioning an edge of a printing plate on a plate cylinder of a printing press includes a single actuating shaft for releasing clamping and tensioning forces. The actuating shaft has a control cam for releasing the tensioning forces and a control roller for releasing the clamping forces. A printing unit having the device and a printing press having the printing unit are also provided.

Abstract: A printing press has a printing unit with a cylinder and a cleaning device that is mounted for selective displacement into an operating position for cleaning the cylinder and into a maintenance position away from the cylinder. The operating position is located within the printing unit and the maintenance position, although being located outside the printing unit, is located on the press. While the press runs in printing operation, the cleaning device is kept away from the operating position.

Abstract: A printing press includes a form cylinder, a blanket cylinder, an impression cylinder, an adjusting apparatus having at least one first actuating drive for setting a printing pressure between the blanket cylinder and the impression cylinder, and a tracking system for setting a printing pressure between the form cylinder and the blanket cylinder in dependence on the setting of the printing pressure between the blanket cylinder and the impression cylinder. The tracking system has at least one second actuating drive coupled to the at least one first actuating drive in terms of control technology through an electronic control device, in such a way that the form cylinder is adjusted automatically.

Abstract: A printing press has a printing unit with a cylinder and a cleaning device that is mounted for selective displacement into an operating position for cleaning the cylinder and into a maintenance position away from the cylinder. The operating position is located within the printing unit and the maintenance position, although being located outside the printing unit, is located on the press. While the press runs in printing operation, the cleaning device is kept away from the operating position.

Abstract: A rotary lead-through assembly supplies an operating fluid to a rotor of a machine for processing printing material. An operating cylinder includes an expansion chamber and a piston having a piston outlet opening. The piston is mounted so as to be displaceable towards the rotor for coupling a rotor inlet opening and the piston outlet opening with one another. A pressure generator is connected both to the expansion chamber and to the rotor, when the openings are coupled with one another. A threshold value valve is disposed between the expansion chamber and the piston outlet opening. The valve is automatically openable when a given threshold value of an excess pressure of the operating fluid is exceeded. A machine for processing printing material is also provided.

Abstract: A cladding of a printing machine in a region of a side wall of a printing unit of the printing machine includes a housing fastened to the side wall, the housing having an upper housing wall, two lateral housing walls and a housing cover connected to the lateral housing walls so as to be displaceable between a lower position covering the side wall and a position raised to a defined height.

Abstract: A printing machine provided with a rectilinear guide and a cleaning device having a handle for moving the cleaning device along the rectilinear guide includes at least one joint by which the handle is attached to the cleaning device in a manner that the handle is movable relative to the cleaning device.

Abstract: A device for automatically changing printing plates is provided in a printing machine having a plate cylinder to which a printing plate is to be fed and on which the printing plate is to be fixed detachably. The device includes a transport system for conveying the printing plate while permitting axial compensating movements thereof. The transport system has at least one driven transport roller and an air cushion for holding the conveyed printing plate in contact with the transport roller. The plate-holding air cushion is formed between a counterpressure element, on one side, and the printing plate, on the other side.

Abstract: A rotary lead-through assembly supplies an operating fluid to a rotor of a machine for processing printing material. An operating cylinder includes an expansion chamber and a piston having a piston outlet opening. The piston is mounted so as to be displaceable towards the rotor for coupling a rotor inlet opening and the piston outlet opening with one another. A pressure generator is connected both to the expansion chamber and to the rotor, when the openings are coupled with one another. A threshold value valve is disposed between the expansion chamber and the piston outlet opening. The valve is automatically openable when a given threshold value of an excess pressure of the operating fluid is exceeded. A machine for processing printing material is also provided.

Abstract: A printing-plate changer assembly for making-ready and feeding printing plates to a plate cylinder of a printing unit, the assembly including a printing-plate changer located upline of the printing unit, in a position for feeding the printing plates, and being articulatedly connected to the printing unit by at least two four-bar linkages so that it is pivotable upwardly into a swung-away position for servicing work, includes at least one element articulatedly connected with the printing unit and with the printing-plate changer so that it holds the printing-plate changer in both the feeding and the swung-away positions and assists the pivoting movement.

Abstract: A device for automatically changing printing plates is provided in a printing machine having a plate cylinder to which a printing plate is to be fed and on which the printing plate is to be fixed detachably. The device includes a transport system for conveying the printing plate while permitting axial compensating movements thereof. The transport system has at least one driven transport roller and an air cushion for holding the conveyed printing plate in contact with the transport roller. The plate-holding air cushion is formed between a counterpressure element, on one side, and the printing plate, on the other side.

Abstract: A device for clamping the trailing edge of a printing plate in a plate cylinder of a rotary printing machine includes a torsion bar disposed in a cylinder gap formed in the plate cylinder and extending in axial direction thereof, clamping elements affixed to the torsion bar and cooperating with holding elements for clamping the printing plate, and actuators provided on both sides of the plate cylinder for stretching the printing plate in axial direction. The torsion bar is of bipartite construction, and the actuators, respectively, are mounted so as to be displaceable axially independently of one another.

Abstract: A clamping device for locking-up printing forms on a printing-form cylinder of a printing machine, having a plurality of clamping elements disposed so as to be adjustable in axial direction, with an adjusting device for respectively expanding and buckling a clamped printing-form edge, comprising a shaft whereon the clamping elements, with spring elements interposed, are axially displaceably mounted, and adjusting elements disposed on respective outer ends of the shaft for subjecting the clamping elements to forces acting in the axial direction.