Abstract: A method for registering color deviations on printing materials produced in machines processing printing material, includes using a computer to analyze image data from a prepress stage with regard to coloring in a printed image on the printing materials. During the analysis in the computer, the image data from the prepress stage are organized into image types, the image types are allocated set points and the set points are compared with actual values registered by a color measuring instrument on the printing materials being produced.

Abstract: An apparatus for metering printing ink includes an ink fountain roller, an ink fountain and a mounting for the ink fountain. The mounting permits an adjustment of the ink fountain relative to the ink fountain roller. The mounting has at least one elastic element for generating a holding force. The mounting is configured in such a way that a force flux which results from the holding force deflects the ink fountain roller in such a way that its longitudinal outer contour is adapted to the longitudinal outer contour of the ink fountain. A printing press having the apparatus is also provided.

Abstract: In an apparatus for correcting a position of a sheet which is transported in the grip of grippers on a feed drum of a sheet processing machine, in particular a sheetfed rotary printing press, provision is made for a gripper device of the drum to be mounted in independently rotatable arranged supports and for it to be possible for each support to be driven by a step-up gear mechanism.

Abstract: A method and an apparatus for compensating for inking differences between setpoint color values and actual color values in offset printing presses having at least one inking unit and a control computer. The control computer controls the printing speed of the offset printing press and the temperature control of rollers in the inking unit of the offset printing press. The control computer is set up in such a way that, if an inking difference is detected between the setpoint color values and the actual color values, a combined control operation including a change in the printing speed and the temperature in the inking unit is performed in order to compensate for the inking difference. A printing press having the apparatus is also provided.

Abstract: A method and a device for determining color register and lateral register deviations on printing material during production in multi-color printing presses, include a computing unit which takes into consideration the influence of ghosting effects when measuring the deviations on the printing material. The ghosting effects of at least one preceding and/or one succeeding printed image are recursively taken into consideration in the computing unit, when measuring on the printing material.

Abstract: A sheet punching and embossing machine includes revolving gripper cars with which a gripping margin of a sheet is grasped by grippers disposed on the gripper car so as to move the sheet through the machine, a punching station in which the gripping margin can be separated from the sheet, a delivery station in which the gripping margin can be further separated from the sheet, and an ejection station in which the gripping margin can be ejected from the gripper. The ejection station includes a blower which directs a current of air at the gripping margin.

Abstract: A method of controlling an ink profile in an inking unit of a lithographic offset printing press having printing units with cylinders for transporting printing material or for applying printing ink to the printing material. One of the cylinders is a plate cylinder in the printing unit. An operating speed of the inking unit is reduced in relation to an operating speed of the cylinders for transporting printing material or for applying printing ink to the printing material when the printing press is running and the transport of printing material is switched off. The inking unit continues to operate at a reduced speed and the inking unit is disengaged from the plate cylinder during operation at a reduced speed.

Abstract: A method for controlling an inking unit of a printing press, includes resetting an ink metering element from first to second metered quantities for an intended inking level. The metering element is set to a temporary, third metered ink quantity by a control unit, for a time interval, during a non-steady phase of the inking unit before reaching the intended level. A value of a variable characterizing the inking state of printing material is determined and a plurality of sets of values for the variable are predefined, into which the determined value can be grouped. The temporary metering quantity is carried out: at a first rate and/or during a first time period if the value of the variable lies in a first set of values, and at a second rate and/or in a second time period if the value of the variable lies in a second, different set of values.

Abstract: A method for registering color measured values on printing materials with a color sensor includes registering the color measured values on the printing materials at different angles of observation of the color sensor. The angular dependence of the color measured values registered on the printing materials at different angles of observation is corrected in a computer.

Abstract: A method for color measurement of printing materials produced in printing machines includes a first color measurement instrument in the printing machine measuring the color of printing materials, a second color measurement instrument outside the printing machine measuring the color of printing materials produced in the printing machine and a computer communicating with the instruments, storing nominal color values and regulating color in inking units of printing units with the first instrument based on deviations from the stored nominal color values, determined on the printing materials in the printing machine. Printing materials produced by the printing machine are recorded by the second instrument. The second instrument records deviations from an original based on the color measured values determined on printing materials.

Abstract: A book binding machine includes a collating machine, a perfect binder and a transfer device disposed between the collating machine and the perfect binder. The collating machine and the perfect binder are actuated by a common control device. In each case, one transport segment is assigned to a respective book block clamp by the control device. The control device also has a program which, if a defective or missing book block clamp is detected, actuates the collating machine in such a way that no book block is collated for that book block clamp. A method for operating a book binding machine is also provided.

Abstract: A method and an apparatus for feeding printing plates to a plate cylinder of a printing press, load the printing plate in the vicinity of its front edge with a curvature which extends convexly with regard to the plate cylinder axis.

Abstract: A method for producing a pseudo-stochastic master surface for producing a cover or jacket of a cylinder for contacting printing material, includes providing the master surface with a pseudo-stochastic distribution of microsurfaces. The master surface is produced on the basis of a digital master in a jacket preliminary stage and serves for a preferably galvanic production of a microstructured cover, in which structure elevations correlate with the microsurfaces. The pseudo-stochastic distribution helps to avoid disruptive discernible effects, for example the moiré effect and helps to construct the microstructuring in a targeted manner. A master surface, a method for producing a cylinder cover, a cylinder cover, a machine for processing printing material, a method for producing printed products and a method for microstamping printed products, are also provided.

Abstract: A method and computer program product for controlling application of ink in a printing press include predefining a setpoint color value in a device-independent color space. An ink metering element is activated with an ink application value, producing an ink layer thickness, on printing material, associated with the setpoint color value. An actual color value from the ink layer thickness on the printing material is determined, measured or colorimetrically measured in the device-independent color space. Activation with a changed ink application value based on deviation of the actual color value from the setpoint color value, produces an ink layer thickness differing from the produced ink layer thickness. A necessary ink layer thickness change is calculated based on changes in the color values in the device-independent color space upon a change in the ink layer thickness at the point of the actual color value, to determine the changed ink application value.

Abstract: A folded box gluing machine for making folded boxes from blanks includes several processing stations and a conveying mechanism for delivering the blanks through the individual processing stations. The machine also includes an embossing mechanism that includes embossing dies for embossing a script for the blind in the blanks and that is preferably arranged between two processing stations.

Abstract: A method and an apparatus for automatically feeding printing plates to a rotary printing press include conveying devices spaced apart from each other transversely to a conveying direction for feeding the printing plate to a clamping device having register pins. One of the conveying devices is lifted briefly off the printing plate in the event of a lack of in-register contact while the other conveying device remains in contact with the printing plate and thus ensures a forward drive of the printing plate, while the lifting of one conveying device promotes stress relief in the printing plate. A sheetfed rotary printing press having the apparatus, is also provided.

Abstract: A sheet processing machine for the processing of sheets of paper, cardboard, and the like, includes at least one processing station, one delivery unit, one sheet transport system including circulating gripper carts, which are driven by individually actuated linear drives, a machine control system and braking devices located in the entry zone of processing stations. The back edge of the respective sheet at its stop position in the delivery unit and/or the at least one processing station lies directly above the back edge of the delivery stack and/or the back edge of a tool or die of the processing station.

Abstract: A method and an apparatus for handling printing plates which are fed to at least two process stations, include at least one receiving deck on which the printing plates are provided and fed to the different process stations by pivoting the receiving deck. The receiving decks are pivoted first of all about a first rotational axis and likewise about a second rotational axis which is different than the first, in order to ensure favorable receiving angles between the receiving deck and the individual process stations in each case for the printing plate transfer. A printing plate exposer having an apparatus for handling printing plates, is also provided.

Abstract: An apparatus for clamping and releasing a drive wheel on a shaft, includes a spring device which encloses the shaft annularly to provide a direct clamping connection with the shaft. The spring device is connected to the drive wheel which can be a chain sprocket or a gearwheel. A sheet-processing machine and a sheet-fed rotary printing press, are also provided.

Abstract: A register control mark for the detection of positional deviations between at least two color separations printed over one another on a printing material in multicolor printing. The control mark has a pattern with parallel lines of a first color separation and, printed in parallel over the pattern, at least two parallel lines of a second color separation.