Abstract: In a method or system for generation of a toner image layer with a preset layer thickness on a surface of a photoconductor, the two-component mixture of electrically charged toner particles and carrier particles is directed on an auto-surface of a roller adjacent a surface of an applicator element to be inked. At least a portion of the toner particles is transferred onto the surface of the applicator element. An electrical field is generated that exerts at least one force on a portion of the electrically charged toner particles between the roller and the applicator element. A strength of the electrical field is varied to adjust a layer thickness of a layer of the toner particles transferred onto the surface of the applicator element and thus to adjust a thickness of the toner image layer on the photoconductor. A measurement arrangement detects a thickness of at least one region of the toner image layer inked on the surface of the photoconductor as a real value.

Abstract: In a method or system for generation of a toner image layer with a preset layer thickness on a surface of a photoconductor, the two-component mixture of electrically charged toner particles and carrier particles is directed on an auto-surface of a roller adjacent a surface of an applicator element to be inked. At least a portion of the toner particles is transferred onto the surface of the applicator element. An electrical field is generated that exerts at least one force on a portion of the electrically charged toner particles between the roller and the applicator element. A strength of the electrical field is varied to adjust a layer thickness of a layer of the toner particles transferred onto the surface of the applicator element and thus to adjust a thickness of the toner image layer on the photoconductor. A measurement arrangement detects a thickness of at least one region of the toner image layer inked on the surface of the photoconductor as a real value.

Abstract: In a method or system for printing of a recording medium, potential images are generated on a potential image carrier. A developer liquid is used that comprises a transparent photo-polymerizable carrier liquid and charged colorant particles. The developer is transported via an applicator roller to the potential image carrier to form a developer film in a developing zone. The developer film adjacent to the potential image carrier comprises the photo-polymerizable carrier liquid enriched with the colorant particles in regions in which potential images are present on the potential image carrier and said photo-polymerizable liquid substantially depleted of said colorant particles in regions in which no potential images are present. The developer film splits at an end of the developing zone into an image film adhering to the potential image carrier comprising the developed potential image and a film adhering to the applicator roller comprising the photo-polymerizable liquid with residual colorant particles.

Abstract: In a method or system where inking in an electrophotographic printer or copier, a magnetic roller is provided having a rotatable magnetic roller sleeve having a circumferential surface to which a two-component mixture comprising toner particles and ferro-magnetic carrier particles adheres. An applicator element has a circumferential surface to be inked with toner particles and past which the two-component mixture adhering to the circumferential surface of the magnetic roller is guided to produce a toner layer on the applicator element. The magnetic roller has a magnetic rotor which comprises magnetic elements and arranged inside the magnetic roller sleeve. A magnetic rotor and the magnetic roller sleeve are moveable relative to one another.

Abstract: In an electrographic printing device, an image generating system generates an electrical charge image on an image carrier element. The electronic charge image is made visible by a developer station via charged ink particles, the image being subsequently transferred onto a final image medium and fixed thereon. A speed control is provided which: continuously varies speed of the image carrier element from zero up to a limit speed; adapts charge intensity of the image carrier element to its speed; adapts an exposure intensity for exposure according to the image and in a deletion exposure of the image carrier element to its speed; and keeps a supply of toner to the image carrier element constant per area.

Abstract: In a method or device for transport of liquid developer to an image carrier element for electrophoretic digital printing, a developer unit is arranged adjacent to the image carrier element, the developer unit directing a liquid developer having toner particles to the image carrier element, the toner particles crossing over to the image carrier element corresponding to previously-generated potential images. A raster unit is arranged adjacent to the developer unit. The raster unit transports the liquid developer to the developer unit by use of a raster. An electrical voltage is applied between the raster unit and the developer unit in order to exert a targeted field effect on the toner particles in a direction towards the developer unit. A chamber scraper having a dosing scraper is arranged adjacent to the raster unit and having liquid developer having the toner particles which are already charged. From the chamber scraper the raster unit accepts the liquid developer via the dosing scraper.

Abstract: In a method or system where inking in an electrophotographic printer or copier, a magnetic roller is provided having a rotatable magnetic roller sleeve having a circumferential surface to which a two-component mixture comprising toner particles and ferro-magnetic carrier particles adheres. An applicator element has a circumferential surface to be inked with toner particles and past which the two-component mixture adhering to the circumferential surface of the magnetic roller is guided to produce a toner layer on the applicator element. The magnetic roller has a magnetic rotor which comprises magnetic elements and arranged inside the magnetic roller sleeve. A magnetic rotor and the magnetic roller sleeve are moveable relative to one another.

Abstract: In a method and system for modification of at least one property of toner images applied on an image carrier in the electrographic printing and copying device, a toner material is used comprising UV-curable components for a generation of the toner images. The toner images on the image carrier are subjected to an IR exposure with at least one IR component in order to generate a heat recorder for polymerization, and to a UV exposure with UV components.

Abstract: In a method or device for development of potential images previously generated on a potential image carrier, the potential images comprising images to be printed as image locations, in an electrophotographic printing or copying device, an applicator roller directs a liquid developer comprising carrier fluid and toner particles onto the potential image carrier for inking of the image locations of the potential images such that a developer gap provided between the potential image carrier and the applicator rollers is substantially filled. A proportion of the toner particles is mixed with the carrier fluid with a viscosity between 0.1 to 80 mPa*s using a dispersion promoting additive such that the liquid developer has a viscosity between 1-99 mPa*s, so that the toner particles dispersed in the liquid developer in a region of the image locations of the potential images migrate onto. the potential image carrier and no toner particles migrate in regions that are not to be developed.

Abstract: In a method or system for printing of a recording medium, potential images are generated on a potential image carrier. A developer liquid is used that comprises a transparent photo-polymerizable carrier liquid and charged colorant particles. The developer is transported via an applicator roller to the potential image carrier to form a developer film in a developing zone. The developer film adjacent to the potential image carrier comprises the photo-polymerizable carrier liquid enriched with the colorant particles in regions in which potential images are present on the potential image carrier and said photo-polymerizable liquid substantially depleted of said colorant particles in regions in which no potential images are present. The developer film splits at an end of the developing zone into an image film adhering to the potential image carrier comprising the developed potential image and a film adhering to the applicator roller comprising the photo-polymerizable liquid with residual colorant particles.

Abstract: In a method or device for transport of liquid developer to an image carrier element for electrophoretic digital printing, a developer unit is arranged adjacent to the image carrier element, the developer unit directing a liquid developer comprising toner particles to the image carrier element, the toner particles crossing over to the image carrier element corresponding to previously-generated potential images. A raster unit is arranged adjacent to the developer unit. The raster unit transports the liquid developer to the developer unit by use of a raster. An electrical voltage is applied between the raster unit and the developer unit in order to exert a targeted field effect on the toner particles in a direction towards the developer unit. A chamber scraper comprising a dosing scraper is arranged adjacent to the raster unit and having liquid developer comprising said toner particles which are already charged. From the chamber scraper the raster unit accepts the liquid developer via the dosing scraper.

Abstract: The invention relates to a method according to which print data determine the image elements of a printing format to be printed on a substrate. According to the inventive method, the surface tension of a printing liquid (30, 34) is influenced depending on the printing date that pertains to the respective image element.

Abstract: In an electrographic printing device, an image generating system generates an electrical charge image on an image carrier element. The electronic charge image is made visible by a developer station via charged ink particles, the image being subsequently transferred onto a final image medium and fixed thereon. A speed control is provided which: continuously varies speed of the image carrier element from zero up to a limit speed; adapts charge intensity of the image carrier element to its speed; adapts an exposure intensity for exposure according to the image and in a deletion exposure of the image carrier element to its speed; and keeps a supply of toner to the image carrier element constant per area.

Abstract: In a modularly-designed printing device for high-speed printing, a printing system is provided comprising a combination of a plurality of printing groups operated independent of one another. A printing substrate guidance group is provided that is common to the printing groups and which transports a printing substrate through the printing system. The printing groups each comprise a printing unit for printing of the printing substrate, a printing group activation unit for control of printing operation of the printing unit, and an image data unit for preparation of the image data to be printed. The printing substrate guidance group comprises a printing substrate guidance unit for transport of the printing substrate through the printing system and an activation unit for control of the operation of the printing substrate guidance unit.

Abstract: In a device and method for electrographic printing or copying, a latent image carrier is provided having a potential pattern corresponding to an image pattern. An applicator pattern is provided that carries a liquid layer of ink spaced from a surface of the latent image carrier by an air gap. A surface of the applicator element is provided with a structure with which detachment of droplets from the liquid layer is facilitated, the structure having a plurality of first areas having an increased electrical conductivity, a plurality of second areas that differ from a remaining surface based on a portion of surface energy, and a plurality of third areas formed as microscopic elevations. A force field is applied in the air gap to act on the liquid layer. By overcoming the air gap, droplets are transferred from the liquid layer on the surface of the latent image carrier by overcoming the air gap for inking a latent image to create an inked image.

Abstract: The invention relates to a method for operating an electrophotographic printing device (10). A multilevel character generator (22) is used in said printing device (10). Correction parameters (K1, K2, K3) are determined for light coding values (1, 2 and 3) such that a high-quality printed image can he obtained also in the instance of modified printing conditions.

Abstract: A device for cleaning an image carrier of residuals of an ink image, in which for inking the latent image on a latent image carrier, droplets are transferred from a liquid layer onto the surface of the latent image carrier by overcoming an air gap. The cleaning device is arranged at the circumference of the image carrier and removing the residual ink remaining after transfer of the image inked with a liquid ink is removed from the surface of the image carrier.

Abstract: A method for operating a printer or copier in which at least one optical or mechanical attribute of the printed image support to be printed is detected using a sensor (steps 102, 104, 110). At least one printing parameter is given according to the sensor output signals (steps 106, 108, 112). The printed image support is then printed while using the printing parameters detected in such a manner.

Abstract: There is described an applicator element for providing a layer of a liquid ink, in particular for inking a latent image carrier of a device for electrographic printing or copying, the surface of the applicator element having a structure with a plurality of areas at which the detachment of droplets from the liquid layer is facilitated.

Abstract: A printer includes modular printing units held in receptacles, such as by a snap action retainer to permit easy removal and replacement. The printer units each include a photoconductor on which is produced a toner image and multiple printer units are provided in the printer. The photoconductor may either transfer the toner image of each printer unit to the final image carrier, or may transfer the toner image to an intermediate carrier which transfers the toner to the final image carrier. A transfer apparatus effects the transfer of the toner image from the photoconductor to final image carrier, or to the intermediate image carrier depending on the embodiment. The printer units may provide layered toner of different colors on a single side of the final image carrier and may provide two sided printing of the final image carrier. A single toner fixing unit is provided to fix the toner to the final image carrier.