摘要:
A liquid ink development (LID) reproduction machine for producing a stabilized liquid toner image having clean-background areas. The reproduction machine includes a movable image bearing member having a photoconductive surface, and latent image forming devices for forming a latent image on the photoconductive surface such that the latent image has image areas and background areas. The reproduction machine also includes a development apparatus containing liquid toner developer material for developing the latent image. The liquid toner developer material includes a carrier liquid having a relatively low conductivity for preventing shorting of image conditioning electric fields through a layer of the liquid toner developer material forming the image. The liquid toner developer material also includes charged toner particles dispersed within the carrier liquid and having a relatively high charge level per toner particle for making the toner particles more sensitive to a low voltage image conditioning electric field. More importantly, the reproduction machine includes an image stabilization roller having a relatively low voltage biasing field for image conditioning so as to achieve effective image stabilization as well as clean developed image background areas.
摘要:
An intermediate transfer member achieves substantially 100% toner transfer by containing a fluorocarbon elastomer containing less than 60 mole % vulnerable sites in the fluorocarbon chain. A high resolution image can be produced in an image developing system containing such a fluorocarbon elastomer. The fluorocarbon elastomer reduces the charge exchange between toner particles and the intermediate transfer member, and also reduces charge exchange between charge directors in liquid developers and the intermediate transfer member.
摘要:
Disclosed is a process for forming images which comprises (a) generating an electrostatic latent image; (b) contacting the latent image with a developer comprising a colorant and a substantial amount of a vehicle with a melting point of at least about 25° C., said developer having a melting point of at least about 25° C., said contact occurring while the developer is maintained at a temperature at or above its melting point, said developer having a viscosity of no more than about 500 centipoise and a resistivity of no less than about 108 ohm-cm at the temperature maintained while the developer is in contact with the latent image; and (c) cooling the developed image to a temperature below its melting point subsequent to development. Specific processes disclosed include electrophoretic development processes, polarizable liquid development processes, and photoelectrophoretic development processes. Optionally, the developed image is transferred to a substrate subsequent to development.
摘要:
A liquid developer comprised of thermoplastic resin particles, and a charge director comprised of an ammonium AB diblock copolymer of the formula ##STR1## wherein X.sup.- is a conjugate base or anion of a strong acid, R is hydrogen or alkyl, R' is alkyl, R" is an alkyl group containing from about 6 to about 20 carbon atoms, and y and x represent the number average degree of polymerization (DP) wherein the ratio of y to x is in the range of from about 10 to 2 to about 100 to 20.
摘要:
Disclosed is a process for forming images which comprises (a) generating an electrostatic latent image; (b) contacting the latent image with a developer comprising a colorant and a substantial amount of a vehicle with a melting point of at least about 25.degree. C., said developer having a melting point of at least about 25.degree. C., said contact occurring while the developer is maintained at a temperature at or above its melting point, said developer having a viscosity of no more than about 500 centipoise and a resistivity of no less than about 10.sup.8 ohm-cm at the temperature maintained while the developer is in contact with the latent image; and (c) cooling the developed image to a temperature below its melting point subsequent to development. Specific processes disclosed include electrophoretic development processes, polarizable liquid development processes, and photoelectrophoretic development processes. Optionally, the developed image is transferred to a substrate subsequent to development.
摘要:
A solid or phase change inkjet ink incorporating a polar acidic wax is described. The use of polar waxes as an ink additive improves the polarity of the ink and adhesion of the ink to paper. A method for applying the solid or phase change ink incorporating an acidic polar wax additive to form an image is also described.
摘要:
A modular printing device has been developed that may be configured with different numbers of ink colors and ink types and with a different cross-process direction print resolution for each ink color and ink type. The modular printing device configurable to print with multiple combinations of ink colors and ink types at different print resolutions includes a plurality of printhead arrays, each printhead array being configured to eject ink onto an image receiving surface at a first print resolution in a cross-process direction, a plurality of ink supplies, each ink supply being configured to store ink and to provide ink to one printhead array in the plurality of printhead arrays, and a controller configured to operate the plurality of printhead arrays at one of at least two combinations of ink colors and ink types, each combination identifying an ink color or an ink type to be ejected by each printhead array and the controller operating the printhead arrays ejecting a same ink color or a same ink type at a print resolution in the cross-process direction corresponding to the number of printhead arrays ejecting the same ink color or the same ink type.
摘要:
A liquid ink imaging member having a top outer imaging surface is provided for receiving image forming ink droplets from a printhead. The liquid ink imaging member includes (a) a substrate member; (b) at least one elastomeric layer formed over the substrate member and including the top outer imaging surface; and (c) a surface texture formed into the top outer imaging surface and comprising asperities spaced apart at most from about one-half to about one pixel spot size for providing contact angle hysteresis to pin image forming ink droplets received thereon, thereby preventing ink droplet drawback, and resulting in quality images.
摘要:
An image data adjustment system is described which adjusts image data to be printed based upon the level of contaminants detected in the toner reservoirs. The system detects the level of contamination of a toner to be printed and adjusts the image data so that a compensating toner is also printed with the desired toner so that an intended print color is achieved despite contaminants in the toner.
摘要:
A liquid developer comprised of a liquid, thermoplastic resin particles, a nonpolar liquid soluble charge director comprised of at least one oxygen containing group with from 1 to 5 oxygen atoms covalently bound to a quaternized ammonium nitrogen in an AB diblock copolymer or an ABA triblock copolymer wherein the A block is polar and is an ammonium containing polymer, and the B block is nonpolar and is a nonpolar fluid soluble polymer, and wherein the A blocks possess a number average molecular weight range of from about 200 to about 10,000 and the B blocks possess a number average molecular weight range of from about 2,000 to 50,000 and the ratio of weight average molecular weight M.sub.w to number average molecular weight M.sub.n is 1 to 5.