Abstract: The invention relates to a printing machine with hybrid printing technology for printing on a continuous material web.

Abstract: To regulate the gloss on a print material, and avoid excess release oil, the properties of the fusing medium are measured, and the gloss on the print material is determined on the basis of the measured properties of the fusing medium.

Abstract: Controlling a sensor mechanism for a printing machine, in which the sensor mechanism in a printing machine detects, in an initial operational mode, at least one mark and the detection of the mark initiates a second operational mode in which the optical density and the color of the mark are detected by the sensor mechanism.

Abstract: Determining the position of a sheet pile (1, 12) having faces (2) and edges (3) is achieved by at least one defined illumination zone (5, 5′, 5″) produced on the sheet pile (1, 12) by diverging beams (4), and at least two boundaries (6, 6′, 6″, 6′″, 6″″, 6′″″) of at least one illumination zone (5, 5′, 5″) are detected and used to determine the position of the sheet pile (1, 12). A device is correspondingly configured with at least one illumination system (9, 9′) and at least one receiver (7, 7′). A positioning system (10) is additionally fitted with a controller (11) in order to bring the sheet pile (1, 12) from the determined actual position (20) into its desired position (21).

Abstract: Applying a toner print to a substrate, in particular to a substrate (3). At least one print (7) is applied to the substrate. Then, the amount of toner applied to the substrate is measured by a measuring device (21). Finally, the difference between the actual amount of toner and a desired amount of toner in the print (7) applied to the substrate is determined, the printing process being influenced on the basis of the deviation in such a way that the difference in the amounts of toner is reduced or at least remains the same during subsequent prints.

Abstract: A method and device for detecting the position of a transparent conveyor belt including directing light beams (2) onto the region of an edge (3) of the conveyor belt, detecting a jump in intensity of the light beam (2, 2′) as a consequence of the partial insertion of the conveyor belt into the beam path (2) and evaluating the detected jump in intensity in order to determine the position of the conveyor belt, wherein the light beams (2) are linear polarized light and the beam path (2) is directed at an angle or irradiation (&agr;) between 40° and 80° of the light (2) onto the bounding surface (7) in such a way that a high degree of reflection is achieved and reflected light and non-reflected light is detected.

Abstract: A device for separating or singling sheets, which have been piled up to form a stack, in a feeder of a sheet-processing machine, having a transport element with a guide edge, includes a device for matching the shape of the guide edge to the contour of the topmost sheet at a front side of the stack, as viewed in a sheet transport direction.

Abstract: A method is proposed for applying a toner print to a printable surface, in particular to a substrate (3), preferably paper or board, or to a transport surface for a substrate (3), as are a printing machine (1) and a measuring device (21) for implementing the method. Firstly, at least one print (7) is applied to the printable surface. Then, the amount of toner applied to the printable surface is measured by means of a measuring device (21). Finally, the difference between the actual amount of toner and a desired amount of toner in the print (7) applied to the printable surface is determined, the printing process being influenced on the basis of the deviation in such a way that the difference in the amounts of toner is reduced or at least remains the same during subsequent prints.

Abstract: A device for separating or singling sheets, which have been piled up to form a stack, in a feeder of a sheet-processing machine, having a transport element with a guide edge, includes a device for matching the shape of the guide edge to the contour of the topmost sheet at a front side of the stack, as viewed in a sheet transport direction.

Abstract: A method of controlling a level of printing ink in an ink fountain, including, by the use of an ink metering device, topping off printing ink along an ink fountain roller that dips into the printing ink; by a level sensor, determining signals relating to the actual level along the ink fountain roller, feeding the signals relating to the actual level to a control device; in the control device, comparing the signals fed thereto with signals relating to a desired level; forming actuating signals from the derived comparative signals, for an actuating element in the ink metering device, so that printing ink is topped off along the ink fountain roller in accordance with ink acceptance from the ink fountain; from a container with a limited supply of printing ink, dispensing the printing ink for topping off and, if necessary or desirable, renewing the supply of ink in accordance with ink demand, which further includes, for each measurement location of the level sensor, determining the change in the actual level per u