Abstract: A web-fed printing press is disclosed. The press includes at least one printing-plate-based printing unit for statically printing a printing substrate web with a static printing image and at least one processing device, in particular a printing-plate-less printing device for dynamically printing at least one printing substrate web surface of a printing substrate web with a variable printed image in-line. The processing device is assigned a sensor, which automatically measures a statically printed printing substrate web and, depending upon the measurement of the printing substrate web, triggers the processing device to position the processing to be performed with the processing device in the transport direction and/or transverse to the transport direction of the printing substrate web at the desired position on the printing substrate web. The processing device is assigned an operating device to make control commands available to the processing device independent of a printing press control system.

Abstract: A method for printing a substrate web in a rotary printing press is disclosed. The substrate web to be printed is conveyed through a printing form-based printing unit for static printing of the substrate web with a print image that does not vary for the print copies of a printing job, such that at least one static print page is printed in the longitudinal direction of the substrate web per revolution of the form cylinder and several static print pages are printed on the substrate web across the longitudinal direction of the substrate web. In addition to static printing, the statically printed substrate web is printed dynamically with a variable print image in the area of a printing form-free printing device of the rotary printing press such that the print format of the printing form-free printing device extends in at least some sections over at least two statically printed pages.

Abstract: A method for reducing the strikethrough effect in inkjet printing on thin substrates is disclosed. The method includes determining a normal print quality; determining a normal quantity of ink which would be used for inkjet printing of a certain print image on a strikethrough-resistant substrate, based on the normal print quality; determining a minimal print quality for the print image to be printed; determining a maximal value for the strikethrough effect; reducing the normal quantity of ink to a reduced quantity of ink, so that the print image has at least the minimal print quality and the maximal value of the strikethrough effect is not exceeded.

Abstract: A method for printing a printing substrate is disclosed. The printing substrate is printed by a printing-plate-based printing method, in particular by an offset printing method, with a printed image that is the same for printed copies of a print job and therefore with a static printed image as well as, in addition to the printing-plate-based printing method, by a non-printing-plate-based printing method, in particular an inkjet printing method, with a printed image that is variable for the printed copies of the print job and therefore with a dynamic printed image. After the static and dynamic printing of the printing substrate, each printed copy is detected using measuring techniques and recorded at least in sections in such a manner that each printed copy is verifiable with respect to its authenticity.

Abstract: A rotary printing press is disclosed. The press includes at least one plate-free printing unit for printing a substrate web with a static print image for print copies of a print job and at least one plate-free printing unit, in particular an inkjet printing unit for printing the substrate web with a dynamic print image. The/each plate-free printing unit can be shifted from a printing position in which the substrate web can be printed by the same printing unit, into a service position in which no substrate web can be printed by the same printing unit. A device which is assigned to the service position is printable by at least one plate-free printing unit that is shifted into the service position, such that the printing parameters of the same can be verified and adapted to subsequent printing of the substrate web in the printing position.

Abstract: An apparatus and method for printing a printing substrate web in a web-fed printing press is disclosed. The web-fed printing press has at least one printing unit for printing at least one, preferably several, printing substrate webs. The web fed-printing press comprises a web guide device, through which the or each printing substrate web can be transported in such a way that, independent of the web guidance of the or each printing substrate web through the web guide device, at least one printing substrate web can be processed on an upper side and/or on a lower side by at least one processing device that is positioned in the region of the web guide device.

Abstract: The invention relates to a method and devices for cleaning the surfaces of applicator rollers, photoconductor drums, transfer belts, and photoconductor belts using magnetic roller systems. The invention also relates to methods and systems for cleaning magnetic rollers to whose surfaces toner particles adhere. In a first embodiment, a squeegee/scraper is disposed at a distance to the surface of the roller. In another embodiment, a magnetic stator configuration with two spaced apart magnetic elements is used whose poles have substantially the same active direction.

Abstract: A method for the printing of a print fabric is disclosed. Output data, more preferably an output matrix of a print image to be printed with an inkjet printing device is converted to target data, more preferably a target matrix, for controlling the inkjet printing device in real time dependent on a current printing speed, a current drop frequency of the inkjet printing head of the inkjet printing device, and a current inclination angle of the nozzle row of the inkjet printing head relative to the transport direction of the print fabric prior to transmitting the data to the inkjet printing device.

Abstract: To make it possible for a printing press that operates by the offset printing principle to add additional information, including variable information and information that repeatedly changes during a printing run, to any desired place within the printed product, an add-on unit in the form of an inkjet printing system is provided. The unit includes an inkjet printhead mounted on a crosshead is positioned transversely to the direction of web transport in an operating position relative to a web of paper within the printing press in a printing unit or at least in the vicinity of a printing unit.

Abstract: An ink fountain roller has a metal core and a plasma coating that is applied by plasma immersion ion implantation. The coating has a total surface energy of 35 mN/m or less, and a polar component of less than 7 mN/m. The coating is applied in a vacuum chamber by generating a metal plasma over the core, wherein the metal has a valence of +4 or +6 and is preferably at least one of titanium, molybdenum, and zirconium. Positive ions in the plasma are accelerated toward the core by applying negative high voltage pulses (5-15 kV) with very short pulse rise times (<1 ?sec) to the plasma, thereby causing positive ions in the plasma to be implanted in the core. An intermediate layer of metal or ceramic may be applied to the core prior to applying the plasma coating.

Abstract: A method for operating an inkjet printing device with at least one inkjet printhead having a row of nozzles through which ink can be directed onto the substrate to be printed, which is guided over a cylinder or over a curved guide element. The inkjet printhead or each inkjet printhead is oriented transversely to the transport direction of the substrate, so that the nozzles in the row of the inkjet printhead or of each inkjet printhead are different distances away from the substrate to be printed. To print the substrate, the nozzles in the nozzle row of the inkjet printhead or of each inkjet printhead are actuated in such a way that that the differences in the nozzle to substrate travel time caused by the different distances between the nozzles in each row and the substrate to be printed are equalized or compensated.

Abstract: An inkjet printing apparatus includes an array of inkjet print heads, wherein each print head has at least one ink port for receiving ink, at least one nozzle for directing ink onto a substrate to be printed, and at least one control terminal for receiving a supply voltage and/or control signals. A print head mounting element positions the print heads in a defined orientation relative to each other. An electrical supply unit extending over the array is connected to the control terminals of all of the print heads, and can supply a supply voltage and/or print head specific control signals to all of the print heads in common. A mechanical supply unit extending over the array is connected to the ink ports of all of the print heads, and can supply ink to all of the print heads in common.

Abstract: In a device for transporting toner in an electrophotographic printing or copying device, a rotatable cylinder has a cylinder sheath. The cylinder such includes a metallic layer having a surface with a roughness search that at least one of peaks and columns are provided along with recesses. The recesses of the surface are filled with plastic. Also, the cylinder sheath may include a layer of a porous ceramic material having a roughness.

Abstract: In a device for transporting toner in an electrophotographic printing or copying device, a rotatable cylinder has a cylinder sheath. The cylinder sheath comprises a metallic layer having a surface with a roughness search that at least one of peaks and columns are provided along with recesses. The recesses of the surface are filled with plastic. Also, the cylinder sheath may comprise a layer of a porous ceramic material having a roughness.

Abstract: The invention relates to a method and devices for cleaning the surfaces of applicator rollers, photoconductor drums, transfer belts, and photoconductor belts using magnetic roller systems. The invention also relates to methods and systems for cleaning magnetic rollers to whose surfaces toner particles adhere. In a first embodiment, a squeegee/scraper is disposed at a distance to the surface of the roller. In another embodiment, a magnetic stator configuration with two spaced apart magnetic elements is used whose poles have substantially the same active direction.