Abstract: A method of operating a printing machine including a printing form cylinder and an inking unit for inking the cylinder, the inking unit having at least one inking unit roller rotatably driven at a speed different from the peripheral speed of the printing form cylinder, includes rotatably driving the at least one inking unit roller at the differential speed and at a relative speed that is different from the peripheral speed of the printing form cylinder, in time-dependence upon various operating states of the inking unit; and a printing machine for performing the method.

Abstract: A method for dampening a rotating planographic printing form via an ink applicator roller for indirectly dampening the planographic printing form and via a connecting roller in engagement with the ink applicator roller and engaged by a dampener roller for dampening the planographic printing form, includes, during dampening, rotating the dampener roller at a circumferential speed differing from the circumferential speed of the planographic printing form; a dampening unit for performing the method; and a planographic printing machine including the dampening unit.

Abstract: Method of changing sheet piles on a sheet-fed printing press, which includes introducing a sheet pile rake above a main sheet pile for forming an auxiliary sheet pile, further includes laying at least one rotatably mounted wedge on an upper edge of the main sheet pile so as to form a wedge-shaped space; and device for performing the foregoing method.

Abstract: Chain conveyor of a sheet-fed printing machine for first-form and perfector printing includes guided revolving gripper chains, having a respective lower strand and a respective upper strand, at least a part of the lower strand being disposed in a sheet-conveying region, a sheet-guiding device disposed in the sheet-conveying region below the lower strand for guiding in a sheet-conveying direction a sheet having a downwardly directed printed side, the sheet-guiding device being formed with a guide surface continuously movable in the sheet-conveying direction at a sheet-conveying velocity parallel to the lower strand of the gripper chains, and a device for continuously driving the guide surface.

Abstract: An inking unit for printing machines comprises a plate cylinder and a plurality of plate inking rollers being continuously fed with ink by a plurality of inking rollers; seen in direction of rotation of the plate cylinder, the primary ink flow being supplied to the first group of plate inking rollers, and a secondary ink flow being supplied to a subsequent group of plate inking rollers, and comprising the possibility of improving the adjustment of the inking unit to the respective print job by forming two groups of plate inking rollers.

Abstract: A device for aligning a sheet pile in a sheet feeder of a sheet processing machine feedable with sheets therefrom having a front stop provided for a first lateral face of the sheet pile facing towards the machine includes a horizontal stop rail coordinated with a second lateral face of the sheet pile located on a side of the sheet pile opposite to the first lateral face thereof, the stop rail being formed with a directive surface disposed directly opposite the second lateral face of the sheet pile, an automatic adjusting device for pressing the directive surface against the second lateral face of the sheet pile under action of a directive force, and a positioning device for setting the stop rail at selective levels.