Abstract: A printing machine that has a plurality of form cylinders and in which an imaging device images at least two of the form cylinders. The imaging device is arranged in stationary fashion. Laser pulses are deflected onto the form cylinders by light diversion components.

Abstract: A method is described of determining stipulated values for the production of multicolor printed copies, in particular for the production of multicolor printed copies on a printing machine working in half-tone, a reflectance desired value being assigned in the case of an original, in at least one image element having given area coverage of the individual colors to be used in the print, and this at least one reflectance desired value being used during the subsequent printing, in conjunction with a reflectance actual value, in particular for the derivation of adjustment commands for the ink feed so that the subsequently produced print satisfies the best possible color and in particular calorimetric agreement with stipulated values specified during the creation of a printed original.

Abstract: A measurement device is described for the quality control of printed products, having a pair of optical channels that differ in their properties and operate simultaneously. Each optical channel comprises an illumination channel for illuminating a measurement location and a reflection channel that picks up the light reflected from the measurement location. The reflected light is directed to an evaluation unit, which is connected to the reflection channel, that analyzes the reflected radiation spectrally. Polarization filters arranged in one of the pairs of channels provides the difference in the optical properties between the two pairs of channels. The measuring device provides an increased number of obtainable measured values for further processing in a way that requires only a modest increase in the metrological outlay compared to other measuring devices of this type.

Abstract: A computer controlled sheet-fed offset printing machine is described which includes an Interpreter-program for obtaining an image of the signal-state of specified interfaces of the many interfaces that are needed for the operation of the computerized printing press. The Interpreter-program has access to a reserved region of memory for storing and manipulating, if desired, the image of the signal-state. Furthermore, the Interpreter-program has very limited and defined access to the inputs and resources used by the control programs used to operate the computerized printing press. This ensures that the control programs can execute in real-time unaffected by the execution of the Interpreter-program while data is acquired by the Interpreter-program while the computerized printing press is in operation. The Interpreter-program can execute diagnostic routines and provide data for detecting and correcting errors that are otherwise hard to localize in a complex system with complex software.

Abstract: A method is described of determining stipulated values for the production of multicolor printed copies, in particular for the production of multicolor printed copies on a printing machine working in half-tone, a reflectance desired value being assigned in the case of an original, in at least one image element having given area coverage of the individual colors to be used in the print, and this at least one reflectance desired value being used during the subsequent printing, in conjunction with a reflectance actual value, in particular for the derivation of adjustment commands for the ink feed so that the subsequently produced print satisfies the best possible color and in particular calorimetric agreement with stipulated values specified during the creation of a printed original.

Abstract: A measuring system for registering reflectances on printed products, the measuring system having at least one illumination channel for producing a scanning spot at a point on a measurement field on the printed material. The system includes scanning channels for registering the reflectances of the spot from the printed material. The measuring system moves relative to the printed material. Measuring devices supplying ink density and spectral, preferably colorimetric, measured values are combined with one another without additional outlay in terms of construction. The combination of the measuring principles (density and color) are optimally adapted to the task of a measuring strips on the printed material scanned in the longitudinal direction. The measuring system has a densitometer that produces a scanning spot on the printed material, and a spectrophotometer that produces a further scanning spot on the printed material.

Abstract: A method and apparatus is disclosed for setting a distribution of image points on a printing surface having a coating of thermally activated material. For each image point to be set and used as part of an image, a laser heats the image point for a predetermined time period to a limiting or process temperature. The image points are preheated to an intermediate temperature below the limiting or process temperature and above an ambient temperature in order to reduce the energy required to raise the temperature of the thermally activated material at an image point to be set. In one embodiment of the invention, the entire printing surface is preheated to the intermediate temperature. In an alternative embodiment of the invention, only a region of the printing surface is preheated. In this alternative embodiment, the region moves with a writing head that sets the image points.

Abstract: The invention relates to a method and to a corresponding device for detecting spectral reflectance, an illuminating device arranged in a stationary fashion being used to apply to measuring fields moving relative to the measuring system radiation which differs in strength as a function of the relative speed, and the radiation reflected by the measuring fields being further processed after photoelectric conversion to derive measured variables. It is the object of the present invention to develop such a method as well as a corresponding device so that the optical reflectance-measuring system can be optimally adapted to different relative speeds given a prescribed measuring field size.