摘要:
A method of producing an image on a final image receptor from image data in a multiple pass electrophotographic system is provided. The method comprises the steps of applying transfer assist material to an intermediate transfer member and providing at least one development unit comprising a photoreceptive element and charged toner particles. During each complete processing cycle of an intermediate transfer member, a toned image is created and transferred to the intermediate transfer member by application of a bias. In multiple processing cycles of the intermediate transfer member, the transfer assist material and the at least one toned image thereby form a composite image layer on the intermediate transfer member. The method further comprises contacting the composite image layer with a final image receptor while applying a bias that is sufficiently strong to transfer at least a portion of the composite image layer to the final image receptor.
摘要:
A liquid ink for developing electrophotography images comprises: a) a carrier liquid having a Kauri-Butanol number less than 30; b) a pigment having at least one acid group or at least one acid group; c) optionally a grafted co-polymer comprising a (co)polymeric steric stabilizer covalently bonded to a thermoplastic (co)polymeric core that is insoluble in the carrier liquid, wherein the grafted co-polymer is derived from at least a polymerizable organic compound; d) a dispersant having, respectively, at least an amine group or at least one acid group to form an acid-base pigment-dispersant system or a base-acid pigment-dispersant system, wherein the mole ratio of the amine group to the acid group is between 0.3 and 1.5 in the base-acid pigment-dispersant system and the mole ratio of the acid group to the base group in the acid-base pigment dispersant system is between 0.3 and 1.5; and d) a positive charge director with the acid-base pigment-charge dispersant system and a negative charge director with the base-acid pigment charge-dispersant system.
摘要:
The invention provides liquid toner compositions in which the polymeric binder is chemically grown in the form of copolymeric binder particles dispersed in a liquid carrier. The polymeric binder includes one amphipathic copolymer comprising one or more S material portions and one or more D material portions, wherein the amphipathic copolymer comprises a polysiloxane moiety having molecular weight of at least about 500. Methods of making the liquid toner compositions are also provided.
摘要:
Dry electrographic toner particles are provided that comprise at least one visual enhancement additive encapsulated within an amphipathic copolymer. The amphipathic copolymer comprises one or more S portions and one or more D portions. Methods of making and methods of using these toner particles are also provided.
摘要:
Negatively charged coated toner particles are provided that comprise a polymeric binder particle and a coating material. The coating material comprises at least one visual enhancement additive coated on the outside surface of the polymeric binder particle. Electrographic toner compositions comprising these particles, and methods of making these particles particularly by magnetically assisted impact coating processes are also provided.
摘要:
Positively charged coated toner particles are provided that comprise a polymeric binder particle and a coating material. The coating material comprises at least one visual enhancement additive coated on the outside surface of the polymeric binder particle. Electrographic toner compositions comprising these particles, and methods of making these particles particularly by magnetically assisted impact coating processes are also provided.
摘要:
An apparatus for assisting in the removal or waste or excess ink and a method for disposal of ink from electrophotographic printers comprises providing electrophotographic ink from a source, combining the ink with an absorbable material in a container to form a solid within the container, and closing the container so that the container with the solid inside may be disposed of without ink flowing from the container.
摘要:
An apparatus for assisting in the removal or waste or excess ink and a method for disposal of ink from electrophotographic printers comprises providing electrophotographic ink from a source, combining the ink with an absorbable material in a container to form a solid within the container, and closing the container so that the container with the solid inside may be disposed of without ink flowing from the container.
摘要:
Methods of preparing a liquid electrographic toner composition are provided, wherein a polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions is first prepared in a hydrocarbon reaction solvent, wherein the hydrocarbon reaction solvent comprises less than about 10% aromatic components by weight and has a Kauri-Butanol number less than about 30 mL. Toner particles are then formulated in the hydrocarbon reaction solvent and dried. The dried toner particles are then redispersed in a carrier liquid that is different from the reaction solvent, wherein the carrier liquid comprises less than about 10% aromatic components by weight and has a Kauri-Butanol number less than about 30 mL, to form a redispersed liquid electrographic toner composition. Preferred carrier liquids are silicone oils. Products and kits are also provided.
摘要:
The invention provides liquid electrographic toner compositions comprising a liquid carrier having toner particles and at least one soluble polymer dispersed in the liquid carrier. The liquid carrier has a Kauri-Butanol number less than about 30 mL. The toner particles comprise polymeric binder comprising at least one amphipathic copolymer comprising one or more S material portions and one or more D material portions. The soluble polymer is present in an amount of from about 1% to about 10% by weight based on toner particle weight. The absolute difference in Hildebrand solubility parameters between the soluble polymer and the liquid carrier is less than about 3.0 MPa1/2. In one aspect of the invention, the soluble polymer that is incorporated in the toner composition has no more than about 30% weight ratio chemical constitution variance from the chemical constitution of the S material portion of the amphipathic copolymer. In another aspect of the invention, the soluble polymer that is incorporated in the toner composition has no acidic functionality having a pKa greater than 8, and has no basic functionality having a pKa of its conjugate acid that is greater than 8. Methods of making these compositions are also provided.