Abstract: A method for printing an image on a substrate by image-wise depositing, toner particles on the substrate, is disclosed, comprising: image-wise depositing dry toner particles on the substrate forming a first band-like portion of the image, conditioning the first band-like portion while keeping the substrate at a temperature equal to or lower than 100° C. and further image-wise depositing toner particles on the substrate so as to form at least one other band-like portion of such image, the at least one other band-like portion of the image being adjacent to the first band-like portion. Preferably the method is used for printing substrates with an area equal to or larger than 0.25 m2.

Abstract: A method and device for printing a reproduction of an image by using toner particles, in which digital image data of at least two density separations of the image is obtained for forming at least two sub-images. The image data of a first sub-image of the sub-images is provided to a printing station containing toner particles with a particular chromaticity and a particular optical density. Then, the first toner particles are applied in an image-wise manner on an image receiving member for forming a first toner image in correspondence with the image data. Thereafter, on the same printing station and using second toner particles having a chromaticity substantially equal to the particular chromaticity and an optical density substantially equal to the particular optical density, the image data is again provided and the toner particles are again applied for bringing at least one second toner image, corresponding to a second sub-image, on the image receiving member in register with the first toner image.

Abstract: A white toner composition comprising 100 parts by weight of a toner resin containing at least 50 parts by weight of a polyester resin and between 65 and 180 parts by weight of rutile type TiO.sub.2, 10 g/m.sup.2 of said non-magnetic toner particles deposited on a transparent foil giving an opacity (hiding power) of at least 60%.

Abstract: A method for achieving a pre-selected gloss in an electrographic image printing system, by choosing the appropriate combination of fusing speed and fusing temperature.As a result of the above, the homogeneity in gloss and color of one image and the homogeneity of different images, compared to each other, can be improved significantly.

Abstract: Dry toner particles with a resinous matrix containing a mixture of a polymer (LPC) with low softening point and tg.delta.>3, modified by a modifier (D) selected from the group consisting of long chain aliphatic compounds with a reactive end group and having between 20 and 250 carbon atoms and a polysiloxane, said modifier and said polymer being present in a molar ratio LPC/D between 0.8 and 1.25 and a non-linear polymer with a softening point T.sub.sB such that 110.degree. C. .ltoreq.T.sub.sB .ltoreq.135.degree. C. The toner particles further contain a wax chosen from waxes having a melting point near to the softening point of the branched polymer B.

Abstract: Dry toner particles comprising an amorphous complex macromolecular compound that contains in its macromolecular structure,(i) a polyester backbone (A) having a Tg of at least 45.degree. C. and(ii) at least one polymer chain (B) being attached to the backbone, either terminally and/or in a side-chain, the polymer chain (B) being derived from a polymer selected from the group consisting of polyolefines and polyolefines containing alkoxy groups which on itself has an average molecular weight by number (M.sub.avg) so that 1900.ltoreq.M.sub.avg <4000, a melting point between 50.degree. C. and 150.degree. C. and a melting range of at most 15.degree. C.

Abstract: A fusing station (25) of an electrographic apparatus fixes in a single pass a duplex resinous powder color image (8, 18) to a support material in sheet-form (9) as the sheet is moved over a predetermined path (7). The station comprises two heated fixing rollers (1, 11), rotating in contact with each other, driving means to rotate the fixing rollers, pressing means for applying a meshing force between the fixing rollers, heating sources (4, 14) which have substantially identical characteristics. Both fixing rollers comprise a heat conducting core (3, 13) and a resilient covering (2, 12) which by the pressure between both rollers forms a heating nip. A symmetrical fixing operation on both sides of the sheet is provided. Hereto, the fixing rollers have a substantially identical construction, are positioned symmetrically to the path of the sheet and rotate synchronously to the advancement of the sheet.

Abstract: A fusing station of an electrographic apparatus fixes in a single pass a duplex resinous powder color image to a support material as the support material is moved over a predetermined path through the fusing station. The fusing station employs a symmetrical fixing operation on both sides of the support material. The fusing station applies hot air to both sides of the support material in substantially equal flows. The hot air is heated by heating sources with substantially identical operational characteristics such that the flows of hot air are heated to substantially equal temperatures on both sides of the support material.

Abstract: An amorphous complex macromolecular compound is provided hat comprises in its macromolecular structure,(i) an amorphous polycondensation backbone, the corresponding backbone polymer having a Tg of at least 45.degree. C. and(ii) at least one polymer chain attached to the backbone, either terminally and/or in a side-chain, this polymer chain being derived from a polymer which on itself has an average molecular weight by number (M.sub.avg) so that 400.ltoreq.M.sub.avg .ltoreq.4000, a melting point between 50.degree. C. and 150.degree. C. and a melting range of at most 15.degree. C.There are also provided methods for the production of the amorphous complex macromolecular compound.Further are provided toner particles and toner receiving substrates comprising the amorphous complex macromolecular compound mentioned above.

Abstract: A heat and pressure fusing device (10) for fixing toner images to a receptor support, the device having a fixing (12) and a pressure (13) roller rotating in contact with each other, wherein the fixing roller has a diameter larger than 70 mm.

Abstract: An electrostatic method for producing a master image for decorating ceramic, enamel or glass objects comprising the steps of:providing a temporary support having a surface with release properties,image-wise depositing charged toner particles, having a volume average particle size d.sub.v50t, such that 5 .mu.m<d.sub.v50t <15 .mu.m and including particles of a ceramic pigment, CP, having a volumetric particle size distribution such that 90% of the particles have a diameter lower than 2/3 times d.sub.v50t andproviding particles of glazing material, having a volumetric particle size distribution such that 90% of the particles have a diameter lower than d.sub.v50t, in the master image. Preferably the glazing material is formed in the master image by image-wise depositing toner particles comprising both a ceramic pigment and glazing material.

Abstract: A printer, with printing width (PW) of at least 30 cm printing a toner image on a large substrate, having a width (WS) and a length (LS), including a latent image bearing member having a width (WLI) equal to or larger than the printing width and at least two means for delivering toner are arranged in a staggered configuration around the latent image bearing member and each having a width (WTD) smaller than the width (WLI) of the latent image bearing member.Preferably the latent image bearing member is a photoconductive member.A printer with a shuttle having a swath width of at least 30 cm is also disclosed.

Abstract: A toner image, comprising a plurality of fused different types of toner particles on a substrate is provided wherein on top of the image, optionally comprising a clear finish layer, a plasticizer is present in an amount between 0.1 and 10 g/m.sup.2. At least one of the different types of toner particles contains a toner resin with at least one reactive group A and the plasticizer carries at least one reactive group B and when the plasticizer is applied to the toner image, the reactive group A reacts with reactive group B and forms a chemical bond between the toner image and the plasticizer. A method and an apparatus for providing such a toner image, resistant to cracking are also provided.

Abstract: Toner particles comprising a toner resin are provided, characterised in that the toner resin comprises a radiation curable resin having a Tg.gtoreq.35.degree. C. The radiation curable resin is preferably a UV-curable resin and is a member selected from the group consisting of unsaturated polyester/polyurethaneacrylate mixture and unsaturated polyester/polyurethane-vinylether mixture. A method and an apparatus for forming radiation cured toner images are also provided.

Abstract: A method for coating carrier particles for use in electrostatic developers is provided comprising the steps of:bringing the carrier particles to be coated in a vessel equipped with means for agitating the carrier particles, so that the carrier articles occupy less than 85% by volume of the vessel, and the agitation of the carrier particles is described by a Froude number between 0.2 and 20,adding a solution containing between 6 and 60% by weight with respect to the total volume of the solution of chemical compounds for coating the carrier particles in a solvent with a boiling point of A.degree. C. to the vessel at such a rate that, at any time, the solvent is present in an amount lower than 1.25 10.sup.-4 ml per cm.sup.2 of surface of the carrier particles to be coated,keeping the carrier particles in the vessel at a temperature of at most (A+10).degree. C., andcontinuously evacuating the solvent.

Abstract: A method for forming images is provided, comprising the steps of:i) providing a substrate comprising reactive group RGB,ii) providing toner particles comprising reactive group RGA,iii) image-wise depositing the toner particles on the substrate andiv) reacting the reactive group RGA with the reactive group RGB so as to harden the toner particles.The reactive group RGA and the reactive group RGB are a member selected from the group consisting of epoxy groups, aldehyde groups, hydroxyl groups, carboxyl groups, mercapto groups, amino groups and amide groups and are chosen such as to form a reaction pair.

Abstract: An image receptor sheet or web material carrying a layer with a polymeric binder on a support wherein the polymeric binder is at least 50% by weight of a polysiloxane modified resin and comprises polymeric moieties derived from polyesters or addition polymers with an acid value or hydroxy value between 2 and 50 mg KOH/g of polymer and the polysiloxane moieties are derived from epoxy-terminated polysiloxanes.

Abstract: A toner image, comprising a plurality of fused different types of toner particles on a substrate is provided wherein on top of the image, optionally comprising a clear finish layer, an abhesive compound is present in an amount between 3.0 and 300 mg/m.sup.2 and wherein the abhesive compound has a viscosity, at 25.degree. between 50 and 50,000 mPas. A method and an apparatus for providing such a toner image, resistant to scratching are also provided.

Abstract: Toner particles are provided, having an average volume diameter d.sub.vt and comprising a binder resin with melting point TSM.sub.t, and comprising polymeric beads incorporated in the bulk of the toner particles, characterized in that the polymeric beads have i) a melting point TSM.sub.p in .degree.C., such that TSM.sub.p .gtoreq.TSM.sub.t +10.degree. C. and ii) an average volume diameter d.sub.vp such that 0.20.ltoreq.d.sub.vp /d.sub.vt .ltoreq.0.75.

Abstract: An apparatus for security printing of a document on a substrate, having a first and second side, comprising:i) means for feeding variable data in a predetermined digital format to printing stations,ii) at least two printing stations, for image-wise depositing, in accordance to the predetermined format of the variable data, toner particles on the substrate,iii) means for fusing the toner particles to the substrate, to form a fused toner image, characterized in thata) the apparatus comprises means for introducing security features in the document andb) the means for fusing the toner particles to the substrate comprise means for heating and melting the toner particles such that between the melting toner particles and the substrate a contact angle of at most 90.degree. is formed and leave at most 25 mg/m.sup.2 of an external releasing agent on the fused toner image.