Abstract: A cylinder for an offset printing press comprising a steel core and a heat-conducting layer arranged on the steel core in order to uniformly distribute localized steel core heating. The heat can consist of copper and can be arranged in or underneath a functional layer on the cylinder.

Abstract: A damping unit for a press has means for applying a clamping solution to a printing form and means for setting the quantity of damping solution applied. At least one sensor is provided for registering the quantity of damping solution actually applied to the printing form. By means of a comparison with a predefined quantity of damping solution, the quantity of damping solution on the printing form can be regulated.

Abstract: A web-fed printing press having at least one printing unit for static printing of at least one printing substrate web, preferably of a plurality of printing substrate webs, with a printed image which is invariable for all printed copies, and at least one processing device positioned upstream of the folding apparatus and configured to dynamically process the at least one printing substrate web in a variable manner for at least some printed copies, and a manipulation device positioned to support the at least one processing device, where the at least one processing device is displaceable by the manipulation device in three spatial dimensions within a region of action of the manipulation device such that the at least one processing device is positionable at a freely definable position of the at least one printing substrate web with a freely definable orientation to the at least one printing substrate web.

Abstract: A folding apparatus and method for a web-fed rotary press having a first folding jaw cylinder, a cross cutter by which a first web ribbon comprising a first quantity of printing stock webs is fed to the cross cutter and is cross cuttable into first print products by the cross cutter and a collection cylinder by which the first print products are subsequently cross folded by the collection cylinder and the first folding jaw cylinder. The apparatus also includes an auxiliary cross cutter which cross cuts a second web ribbon comprising a second quantity of printing stock webs into second print products. A transfer device is used to transfer the second print products produced from the second web ribbon to the collection cylinder. As a result, a first print product and a second print product are combined on the collection cylinder and are cross folded together when transferred to the first folding jaw cylinder.

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: The invention relates to a method for operating a printing press, particularly a sheet-fed offset printing press, wherein at least two drives, whose positions can be controlled independently from each other, feed into a continuous gear train of the printing press. A desired torque distribution for the drives feeding into the continuous gear train is determined such that each drive provides a driving torque for the associated sub-unit of driven devices and in part for the sub-unit of driven devices associated with a drive connected downstream of the respective drive, wherein based on said torque distribution for each drive an individual angle target value is determined, which is used to control the position of each drive individually in order to provide an angular difference that is dependent on the torque distribution between the feed sites of the drives.

Abstract: The invention is directed to a method for controlling an inkjet printing device working according to the continuous inkjet principle so that a print image to be printed by the inkjet printing device can be positioned on a substrate. The inkjet printing device supplies ink droplets at a determined droplet generating frequency, and the position of the substrate to be imprinted relative to the inkjet printing device is monitored by means of a sensor, in particular by means of an encoder, in order to generate an actuating signal for the inkjet printing device.

Abstract: A method for printing on a substrate, wherein the substrate is printed upon with a plate-based printing process, i.e., an offset printing process, and with a plateless printing process, i.e., an inkjet printing process, inline with the plate-based printing process. In accordance with the invention, the printing resolution of the plateless printing process is determined depending on a printing speed of the plate-based printing process.

Abstract: An image processing system for use in a sheet-fed offset printing press inspects image data in a variable manner. and provides remediation in the event of a malfunction in order to reduce misprints, thus reducing waste and associated cost inefficiency.

Abstract: A folder superstructure of a web-fed printing press is disclosed. The folder superstructure having several formers positioned side by side, namely at least four formers positioned side by side laterally, where three formers are positioned such that a center former of these three formers is positioned in the center of the machine or in the center of undivided print substrate webs and the two outer formers of these three formers are positioned symmetrically to the center former. Partial webs of the print substrate webs separated by longitudinal cutting can be guided over each of these three formers with and/or without prior turning, and at least one further former is positioned laterally next to these three formers, over which partial webs of print substrate webs separated by longitudinal cutting can be guided exclusively with prior turning.

Abstract: To transfer a coating in image form from a transfer foil to a print sheet, adhesive is applied in the form of the image to said sheet. In a foil transfer module (2), the carrier foil with the coating in image form is then brought into contact with the print sheet using contact pressure, so that the coating adheres to the adhesive pints and an image is produced. To improve the function, simplify the device and increase the flexibility of the method, a transfer cylinder (3) is provided with a covering that has a variable cover thickness (25), in order to adapt the surface speed of the transfer cylinder (3).

Abstract: A former arrangement for processing a substrate web in a reel-fed printing press having at least three formers which are arranged adjacent to each other and transversely to a web running direction of the substrate web and at least five longitudinal slitting devices for the longitudinal slitting of the substrate web in at least two part webs which are arranged offset to each other in the web running direction in front of the at least three formers and transversely to the web running direction, wherein the at least three formers and the longitudinal slitting devices are each separately moveable transversely to the web running direction.

Abstract: A printing unit (1, 2) in a web-fed rotary printing press for imprinting both sides of a printing stock web (7) with process colors cyan and/or magenta and/or yellow and/or black (CMYK), wherein at least one imprinting device (3) is arranged at the printing unit. The inking unit or inking units (9) of the imprinting device (3) is/are outfitted with an ink and/or an additive which are/is different than the process colors and which can be applied to the printing stock web (7).

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 of a printing press, such as a web press constructed as a periodical printing press, having at least one printing couple, wherein the printing couple or each printing couple comprises a form cylinder, a transfer cylinder, an inking unit, and preferably a dampening unit. A drive motor is associated with at least one printing couple, and drives the form cylinder or the transfer cylinder of a respective printing couple. In accordance with the invention, a flywheel mass is associated with at least one drive motor which drives the form cylinder or the transfer cylinder of the respective printing couple, where the flywheel mass is connected to the rotor of the respective drive motor in a torsionally rigid manner.

Abstract: A method for the control of a feed mechanism of a web-fed printing press, i.e., for the control of tensile stress and/or web tension of a printing material web to be taken into the printing unit by the feed mechanism, wherein thereby an actual value is compared with a desired value. According to the discrepancy between the actual value and the desired value, a control device for the tensile stress and/or the web tension produces a correcting variable for the feed mechanism. The actual value of the tensile stress and/or the web tension is determined by calculation based on a model.

Abstract: A method for operating a dampening system of a printing group of a printing machine, especially a web-fed rotary printing press, the dampening system comprising a dampening means dosing device provided with a plurality of dosing units, a dampening system rolling mill drive having at least one dampening system roller, and at least one dampening means application roller. The application of the dampening means is adapted to the width of the material to be printed or to widths of the sides of the material to be printed.

Abstract: A method for starting up a web-fed printing press is disclosed. In an embodiment, the method includes: a) a first start-up sequence is executed while using predetermined preset parameters that are specific to the printing press and/or the print job for the color register adjustment, cut-off compensator control and the ink density control; b) the web-fed printing press is subsequently stopped, where copies printed during the first start-up sequence are evaluated with respect to the color register, the cut-off compensator and the ink density, and where the preset parameters are adjusted as a function of this evaluation while the printing press is stopped; c) following this, a second start-up sequence is executed, where the preset parameters that are adjusted during the standstill are not used for printing until defined printing press speeds are reached and/or exceeded.

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: In order to transfer an image-type coating from a carrier film to a printed sheet, an image-type adhesive is applied to the printed sheet. In a film transfer module (2), the carrier film comprising the image-type coating is rolled over the printed sheet using contact pressure such that the coating adheres to the adhesive sections, thus forming an image. In order to improve the function, simplify the device and increase flexibility, a modular holder for film rolls of the transfer foil (5) is provided, allowing simplified handling.