Abstract: Take-off strips are adaptively generated based on the color profile of the image to be printed to smooth ink consumption and present a more constant ink coverage and ink flow. Adaptive take-off strips have complementary color profiles to the image being printed.

Abstract: The invention relates to a filter for fluids, in particular water, having a filter surface and a rotary spray arm contained in said filter, said arm conducting a flushing medium against the filter surface. To achieve an increase in the throughput capacity of the filter and to improve the flushing of the filter surface, the filter is equipped with a fluid-proof drum motor, which drives at least one spray arm.

Abstract: The invention relates to a filter for fluids in conduits, consisting of: a tubular filter housing (1); a filtering basket (9) that is coaxial with the filter housing (1) and that is positioned to rotate; a stationary flushing connection (16) for removing substances that have been retained by the filtering basket (9), said connection covering successive parts of the filtering basket (9) and being connected to means for removing the substances. To achieve a simple construction for the filter, increased operational safety for the drive components and the rotational mounting of the filtering basket (9), in conjunction with reduced production and maintenance costs, a fluid-proof drum motor (3) is coaxial with the filter housing (1) and the filtering basket (9) is fixed to the drum (4) of said motor.

Abstract: Take-off strips are adaptively generated based on the color profile of the image to be printed to smooth ink consumption and present a more constant ink coverage and ink flow. Adaptive take-off strips have complementary color profiles to the image being printed.

Abstract: The invention relates to a filter for fluids, in particular water, having a filter surface and a rotary spray arm contained in said filter, said arm conducting a flushing medium against the filter surface. To achieve an increase in the throughput capacity of the filter and to improve the flushing of the filter surface, the filter is equipped with a fluid-proof drum motor, which drives at least one spray arm.

Abstract: The invention relates to a filter for fluids in conduits, consisting of: a tubular filter housing (1); a filtering basket (9) that is coaxial with the filter housing (1) and that is positioned to rotate; a stationary flushing connection (16) for removing substances that have been retained by the filtering basket (9), said connection covering successive parts of the filtering basket (9) and being connected to means for removing the substances. To achieve a simple construction for the filter, increased operational safety for the drive components and the rotational mounting of the filtering basket (9), in conjunction with reduced production and maintenance costs, a fluid-proof drum motor (3) is coaxial with the filter housing (1) and the filtering basket (9) is fixed to the drum (4) of said motor.

Abstract: An apparatus for the photoelectric measurement of an essentially planar measurement original includes a photoelectric scanner and a positioning arrangement for the two dimensional movement of the scanner over the measurement original positioned on a supporting surface and the positioning at defined measurement locations on the measurement original. The positioning arrangement is constructed as a type of SCARA robot and includes a stationary base, a first and a second movable robot arm and a positioning control. The first robot arm is mounted on the stationary base for rotation by a motor about a first axis of rotation perpendicular to the supporting surface. The second robot arm is mounted at the free end of the first robot arm for rotation by a motor about a second axis of rotation perpendicular to the supporting surface and carries the scanner, and the positioning control is constructed for rotation of the two robot arms according to externally supplied positioning commands.

Abstract: An apparatus for the photoelectric measurement of an essentially planar measurement original includes a photoelectric scanner and a positioning arrangement for the two dimensional movement of the scanner over the measurement original positioned on a supporting surface and the positioning at defined measurement locations on the measurement original. The positioning arrangement is constructed as a type of SCARA robot and includes a stationary base, a first and a second movable robot arm and a positioning control. The first robot arm is mounted on the stationary base for rotation by a motor about a first axis of rotation perpendicular to the supporting surface. The second robot arm is mounted at the free end of the first robot arm for rotation by a motor about a second axis of rotation perpendicular to the supporting surface and carries the scanner, and the positioning control is constructed for rotation of the two robot arms according to externally supplied positioning commands.

Abstract: A process for the reduction of artefacts during the reproduction of an image based on image data and having a plurality of image points, by a specific image reproducing device is disclosed, whereby the image points have appearance properties, the process including the following steps: device characteristics which describe the appearance properties of image points produced by the specific image reproducing device in answer to image data and describe the dependence of the appearance properties on the position assigned to the image data, are provided or input, reproduction image data are input, and the image data corrected based on the device characteristics and depending on the positions assigned to the image data.

Abstract: An apparatus for printing on sheet material is set-up in a modular fashion having physically added modules, particularly having modules stackable one on top of another, each module including a printing mechanism. The apparatus also includes a modular distributor unit that is distributed amongst the modules for distributing the blank sheet material to the available modules and, if required, for bringing together printed sheet material and for sorting the printed sheet material. The modules are designed such that they can be easily stacked one on top of another, so that no cabling or wiring has to be carried out. The connection of the individual modules with each other is made through a bus system having corresponding connection and expansion interfaces, for example in the form of plug-in connections. A central control unit is provided in a base module, which central control unit recognizes the connected expansion modules through the bus system and configures itself.

Abstract: A process for the reduction of artefacts during the reproduction of an image based on image data and having a plurality of image points, by a specific image reproducing device is disclosed, whereby the image points have appearance properties, the process including the following steps: device characteristics which describe the appearance properties of image points produced by the specific image reproducing device in answer to image data and describe the dependence of the appearance properties on the position assigned to the image data, are provided or input, reproduction image data are input, and the image data corrected based on the device characteristics and depending on the positions assigned to the image data.

Abstract: A remission sensor is provided in an inkjet printing apparatus for various measurement tasks, which sensor is constructed for densiometric and colorimetric measurement tasks and has a high local resolution. In a first application, the borders of the picture carrier are detected and the printing of pixels of the digital image located outside the borders prevented. This permits the manufacture of borderless pictures without the wasting of printing ink. In a second application, the sensor is used for the photoelectric scanning or measurement of co-printed print head test patterns. The functional condition of the print head(s) can be determined by analysis of the measurement data obtained with suitable algorithms, and corresponding measures can be initiated. In this way the production of waste can be prevented. In a further application, the sensor is also used for the measurement of co-printed color test patterns.

Abstract: A displacement machine for compressible media has at least two shafts with rotors which are designed as helical profile bodies. During rotation, the profiles intermesh like gears and run free of contact relative to one another. The lead of the helical profile bodies decreases from the inlet end to the outlet end and have a double-start design, with the leads at the inlet end and outlet end of the helical profile bodies being constant, and the intermediate lead decreasing continuously from the larger lead at the inlet end to the smaller lead at the outlet end.

Abstract: The present invention relates to a photo finishing system for printing images on a sheet material comprising: an image data source for providing image data; and an ink-jet printer for printing an image on the sheet material in accordance with the image data.

Abstract: The rotary piston machine with an axial direction of delivery from the top downwards, in particular of screw spindle-type construction, with cooling ducts (12) for the motors (8), bearings (7) and sensors (9), through which ducts a cooling fluid flows, and with a cooling device for the pump space (3) is characterized in that the casing (2) of the pump space (3) has a closed annular space (15) which is partially filled with a liquid, which is cooled by the cooling fluid via heat exchanger surfaces (18).

Abstract: An image-recording drum apparatus includes a rotatably driven clamping drum (100), means (160) for the fastening of a recording medium (M) on the mantle (110) of the clamping drum and a recording unit (200) which is stationary relative to the direction of rotation of the clamping drum and records on the recording medium (M) fastened onto the mantle of the rotating clamping drum (100) image information fed thereto in the form of electrical signals. Mounting means (120) are provided in the interior of the clamping drum (100) for supporting a supply of recording medium (M) wound up into a roll (130). The clamping drum (100) has a slit (140) in its mantle (110) through which the recording medium (M) can be guided from the interior of the clamping drum (100) to its mantle (110) and fastened thereon.

Abstract: To improve the control of the inking process in an offset printing machine, color measuring fields provided on printed sheets are evaluated not as heretofore densitometrically but colorimetrically by means of spectral measurements. Spectral reflections are used to match colors, or color coordinates are calculated from them and compared with corresponding set reflections or set color coordinates. The color deviations obtained in this manner are used to control the inking process. For the stabilization of printing runs the spectral reflections are converted into filter color densities and the inking process is controlled on the basis of these color densities in a conventional manner. The control of the inking process using color deviations and control using color density may be superposed upon each other.The process makes it possible to adapt color impressions in delicate locations of importance for the image in the print to the corresponding locations of the proof.

Abstract: A loop buffer having an input and an output deflector roll and a loop roll flexibly mounted between them in a basically vertical position, with its height relative to the deflector rolls determining the loop length of the strip material to be transported. The loop roll is gravity tensioned via a relatively weak spring by a ballast body guided with free movement in a basically vertically direction. The loop roll also includes two or three parallel coaxial loop wheels of slightly different diameter, adapted to the thickness profile of the strip material, transverse to the longitudinal direction. By selecting a relatively weak spring, the loop roll can follow small but quick changes in the transport speed very easily and quickly, with the acceleration forces caused by tile low inert mass of the moving parts remaining very low.

Abstract: To improve the control of the inking process in an offset printing machine, color measuring fields provided on printed sheets are evaluated not as heretofore densitometrically but colorimetrically by means of spectral measurements. Spectral reflections are used to match colors, or color coordinates are calculated from them and compared with corresponding set reflections or set color coordinates. The color deviations obtained in this manner are used to control the inking process. For the stabilization of printing runs the spectral reflections are converted into filter color densities and the inking process is controlled on the basis of these color densities in a conventional manner. The control of the inking process using color deviations and control using color denisty may be superposed upon each other. The process makes it possible to adapt color impressions in delicate locations of importance for the image in the print to the corresponding locations of the proof.

Abstract: A three-color offset printing machine produces, during the printing of sheets, color measuring strips with several color measuring fields. A gray half-tone field produced by the overprinting of three colors serves as the reference field. The color location of the reference field is compared in a color deviation computer with the color location of a correlated desired reference field. From the color deviation, a layer thickness variation computer calculates a layer thickness variation control vector by means of a sensitivity matrix calculated on the basis of a linear model by a matrix computer. The matrix computer evaluates a series of secondary fields comprising three single color half-tone fields, three single color full-tone fields, three two-color full-tone fields, and a three-color full-tone field.