Abstract: A liquid toner dispersion provided with marking particles comprising a pigment and a polyester based resin. The dispersion includes a nonpolar organic solvent and a hyperdispersant including a graft copolymer provided with an anchor group including an amine-functionalized polymer onto which at least one stabilizing group is grafted. The stabilizing group includes a hydroxylated fatty acid oligomer. The amine-functionalized polymer has a weight-average molecular weight of less than 1000 g/mol.

Abstract: A liquid toner dispersion provided with marking particles comprising a pigment and a polyester based resin, the dispersion comprising a nonpolar organic carrier liquid and a hyperdispersant comprising a graft copolymer provided with an anchor group comprising an amine-functionalized polymer onto which at least one stabilizing group is grafted, wherein a first stabilizing group and a second stabilizing group are coupled to the anchor group, wherein the first stabilizing group is a polyolefin and the second stabilizing group is hydroxylated fatty acid compound.

Abstract: A digital printing apparatus using liquid toner comprising carrier liquid, a dispersing agent and imaging particles, the apparatus comprising: an imaging member adapted to sustain a pattern of electric charge forming a latent image on its surface; a development member arranged to receive a quantity of liquid toner; and to develop said latent image by transferring a portion of said quantity of liquid toner onto said imaging member in accordance with said pattern; a melting unit arranged downstream of the imaging member and configured to melt imaging particles of a transferred part of the portion of liquid toner, said part being transferred from the imaging member, wherein there is provided a dispersing capacity modification unit downstream of the imaging member, said dispersing capacity modification unit being configured for reducing the dispersing capacity of the dispersing agent in the transferred part of the portion of liquid toner.

Abstract: A method for the reduction of caking of excess liquid developer dispersion that remains present on the surface of a member after transfer of liquid developer dispersion from one member to another member in a digital printing apparatus, comprising the step of adding a dispersing composition to the excess liquid developer dispersion, wherein the dispersing composition comprises a dispersing agent.

Abstract: Image processing system for generating control signals for printing means, from source image data from an image source, comprising a raster image processing and layout module configured to convert said source image data into a first lane bitmap element and a second lane bitmap element; a streaming processor arranged to receive said first lane bitmap element and said second lane bitmap element, and position signals comprising position data for said first and/or said second lane image in the printed image; said streaming processor being configured to generate control signals for the printing means based on said first lane bitmap element, said second lane bitmap element, and said position signals in order to be able to adjust the position of said first lane image and/or the position of the second lane image in the printed image.

Abstract: This invention is related to a liquid developer dispersion for use in a digital printing apparatus comprising a non volatile carrier liquid, a marking particle and a dispersing compounds, wherein the marking particle in the liquid developer dispersion is stabilized during storage and wherein at fusing two phases are formed. The invention is also related to the use of the developer in a digital printing apparatus and to a method for preparing the liquid developer dispersion.

Abstract: A digital printing apparatus comprising a developing roller (102) and an image carrying roller (101); the developing roller (102) being arranged to transfer liquid toner (107) onto the image carrying roller (101) in accordance with a charge pattern; an upstream charger (111) upstream of an area (108) of rotational contact between the developing roller (102) and the image carrying roller (101); a downstream discharger (112, 122, 132) downstream of the area (108); a sensor (200) downstream of the area (108) to detect a property representative of the charge of a liquid toner residue; and a controller (210) to receive sensor data from the sensor (200) and to provide a control signal to control the downstream discharger.

Abstract: A method for the reduction of caking of excess liquid developer dispersion that remains present on the surface of a member after transfer of liquid developer dispersion from one member to another member in a digital printing apparatus, comprising the step of adding a dispersing composition to the excess liquid developer dispersion, wherein the dispersing composition comprises a dispersing agent.

Abstract: A digital printing apparatus comprising a developing roller (102) and an image carrying roller (101); the developing roller (102) being arranged to transfer liquid toner (107) onto the image carrying roller (101) in accordance with a charge pattern; an upstream charger (111) upstream of an area (108) of rotational contact between the developing roller (102) and the image carrying roller (101); a downstream discharger (112, 122, 132) downstream of the area (108); a sensor (200) downstream of the area (108) to detect a property representative of the charge of a liquid toner residue; and a controller (210) to receive sensor data from the sensor (200) and to provide a control signal to control the downstream discharger.

Abstract: Disclosed is an image application unit for use with liquid toner, suitable for transferring an image to a drum rotating around a vertical axis or a printing substrate guided by such a drum. The image application unit includes: a liquid toner dosing assembly; an imaging member sustaining a pattern of electric charge forming a latent image on its surface, and arranged to transfer it after development to said drum or said substrate; and a development member arranged to receive liquid toner from the dosing assembly, and to develop the latent image by transferring a portion of the liquid toner onto the imaging member in accordance with the pattern. The liquid toner dosing assembly is adapted for vertical use and the development member and the imaging member are configured for rotation around vertical axes.

Abstract: This invention is related to a liquid developer dispersion for use in a digital printing apparatus comprising a non volatile carrier liquid, a marking particle and a dispersing compounds, wherein the marking particle in the liquid developer dispersion is stabilized during storage and wherein at fusing two phases are formed. The invention is also related to the use of the developer in a digital printing apparatus and to a method for preparing the liquid developer dispersion.

Abstract: Disclosed is a method for producing series of cut-out forms from a continuous web. The method includes: receiving a plurality of print jobs, each one of the print jobs defining an image, a cut-out contour, and a desired number of copies; generating a set of printing patterns including images from print jobs, which may be combined to obtain the desired numbers of copies of the print jobs; making the printing patterns available to a printer in a combination to obtain the desired copies of the print jobs; generating a set of cut-out patterns including cut-out contours from print jobs, which may be combined to match the combined printing patterns; making the cut-out patterns available to a cutting device; and instructing the cutting device about the sequence in which the cut-out patterns must be applied to cut cut-out forms according to the cut-out contours.

Abstract: A method for illuminating printing plates in which the light from a light source is imaged on a two-dimensional light modulator having a plurality of rows of light-modulated cells, and the light is modulated thereby, whereupon the light modulator is imaged on light-sensitive material via an imaging beam path, wherein the light-sensitive material is moved relative to the light modulator substantially perpendicularly to the direction of the rows of light-modulated cells at a relative speed and wherein the data pattern to be imaged on the light-sensitive material is displayed beginning in the first row of the light modulator in each row consecutively during an exposure time (T, T?) and then moved to the subsequent row of the light modulator. In order to improve the method, the image of the data pattern is held substantially stationary relative to the light-sensitive material during the exposure time (T, T?).

Abstract: The invention relates to a device for exposing light-sensitive materials, with an electronic picture memory (2) for storing a master image, with an exposure unit which comprises a light source (22), an electronically activatable light modulator (21) for representing a part picture (24) of the master image (2), and imaging optics (23) for the projection of the part picture (24) onto the light sensitive material (10), with a drive device consisting of motors (9) and of a motor control (12), for moving the exposure unit (8) parallel to the surface of the light-sensitive material (10), with a scroll means (7) for scrolling a picture strip (25, 26) of the master image through the light modulator (21), and with a control device (1) for synchronizing the drive device (9, 12) with the scroll means (7).

Abstract: An electrostatographic printing machine has a liquid toner supply chain incorporating at least a toner supply device (10), a metering roller (21) and a development member (31) and an image carrying member (41). An electrostatic charging device (33) acts onto the development member to impress an electrostatic charge onto the development member and to induce a voltage thereon with respect to a machine electrical common earth potential. The toner supply roller, the metering roller and the developer member are each electrically connected to the machine electrical common earth potential (37) via a respective voltage regulating or controlling means (25, 27, 35) to regulate or control induced voltages on each of the toner supply roller, the metering roller and the developer member.

Abstract: The present invention provides dry toner particles comprising at least a radiation curable resin, and a colouring agent, wherein the circularity of the toner particles is between 0.95 and 0.99 and a charge control agent in a concentration between 0.025% and 1.0% by weight is present preferably as an external additive. The toners of this invention are useful for printing any substrate and for use in any form of printing or marking device.

Abstract: In order to improve a method for producing a structure of polymerisation picture points (9) in a light-sensitive layer (2) of printing plates (3), in particular flexo-printing plates, as an image of picture data composed from a matrix (17) of picture points, by way of structured exposure with a light source, to the extent that an improved tonal range of the print picture is achieved and simultaneously that the manufacturing time is reduced, it is suggested for each polymerisation picture point (9) to be produced by an individual exposure sequence (6, 8, 11) which on the one hand is selected in dependence on the surface density of the polymerisation picture points (9) to be set at the location (A, B, C, D) of the polymerisation picture point (9) and one the other hand in dependence on the picture data.