Abstract: Included is an emulsion aggregation toner formulation having at least one latex and a combination of at least two waxes, wherein one wax is a synthetic wax, and another wax is a natural wax, and further including a developer containing a carrier and the just-described toner.

Abstract: A toner that includes at least one polyester resin wherein the amount of free polyvalent acid monomer in the polyester resin is less than 4 mg/gram, and wherein the percentage of the at least one polyester resin with a MW less than 1500 is less than about 10%.

Abstract: Included is an emulsion aggregation toner formulation having at least one latex and a combination of at least two waxes, wherein one wax is a synthetic wax, and another wax is a natural wax, and further including a developer containing a carrier and the just-described toner.

Abstract: Disclosed herein are emulsion aggregation toner particles having less than about 15 atomic percent oxygen in relation to a total atomic percent of 100 for all elements on the surface thereof. Such toner particles exhibit lower marks on print defects.

Abstract: A toner that includes at least one polyester resin wherein the amount of free polyvalent acid monomer in the polyester resin is less than 4 mg/gram, and wherein the percentage of the at least one polyester resin with a Mw less than 1500 is less than about 10%.

Abstract: A toner composition having toner particles comprising a gel latex, a high Tg latex, a wax, and a colorant. The gel latex is present in an amount of from about 3 weight percent to about 30 weight percent of the toner composition, the high Tg latex is present in an amount of from about 50 weight percent to about 95 weight percent of the toner composition, the wax is present in an amount of from about 2 weight percent to about 40 weight percent of the toner composition, and the colorant is present in an amount of from about 1 weight percent to about 25 weight percent of the toner composition.

Abstract: Disclosed herein are emulsion aggregation toner particles having less than about 15 atomic percent oxygen in relation to a total atomic percent of 100 for all elements on the surface thereof. Such toner particles exhibit lower marks on print defects.

Abstract: Magnetic toner compositions, conductive developer compositions, and methods for producing images in a hybrid jumping development system, more specifically, in a magnetic ink character recognition system, are disclosed. The developer compositions contain coated magnetic toner particles and coated carrier particles. The toner compositions include a resin, colorant, wax, magnetic component, and surface additives of coated silica, titania, and zinc stearate.

Abstract: A black toner of toner particles including at least one binder, at least one black colorant, and a package of external additives is described, wherein the at least one binder includes a styrene acrylate binder and wherein the external additives include each of a first silica having an average particle size of from about 35 to about 45 nm, a second silica having an average particle size of from about 135 to about 160 nm, and a titania having an average particle size of from about 35 to about 45 nm. Also described is a developer that includes the black toner and carrier particles comprising a core of ferrite coated with a coating comprising a polymethyl methacrylate polymer and fluoro-copolymer, carbon black and melamine beads. The black toner and developer are preferably used in a semiconductive magnetic brush development system.

Abstract: An apparatus comprised of a charging component, a development component, a transport component, a photoconductive component, and a fusing component, and wherein the development component contains a toner comprising at least one binder in an optional amount of from about 85 to about 99 percent by weight, at least one colorant in an optional amount of from about 0.5 to about 15 percent by weight, and calcium stearate in an optional amount of from about 0.05 to about 2 percent by weight and wherein following triboelectric contact with carrier particles, the toner has a charge Q measured in femtocoulombs per particle diameter D measured in microns (Q/D) of from about ?0.1 to about ?1 fC/?m with a variation during development of from about 0 to about 0.25 fC/?m and wherein the distribution is substantially unimodal and possesses a peak width of from about 0.1 fC/?m to about 0.

Abstract: A toner comprised of resin, colorant and calcium stearate.

Abstract: A toner for particular use in devices utilizing hybrid scavengeless development includes toner particles of at least one binder, at least one colorant, and optionally one or more additives, the toner exhibiting a charge per particle diameter (Q/D) of from −0.1 to −1.0 fC/&mgr;m with a variation during development of from 0 to 0.25 fC/&mgr;m and the distribution is substantially unimodal and possesses a peak width of less than 0.5 fC/&mgr;m, and the toner has a triboelectric charge of from −25 to −70 &mgr;C/g with a variation during development of from 0 to 15 &mgr;C/g following triboelectric contact with carrier particles. Use of a toner with such properties in a hybrid scavengeless development apparatus enables images to be achieved with properties similar to that achieved in offset lithography.

Abstract: A method of forming a toner having controlled properties for use in a developer composition finding particular use in a hybrid scavengeless development scheme includes feeding at least one binder and at least one colorant into a mixing device at a feed ratio, upon exit of the mixture from the mixing device, monitoring one or more properties of the mixture with at least one monitoring device, wherein if the monitoring indicates that the one or more properties being monitored is out of specification, removing the monitored mixture from the method and adjusting the feed ratio by adjusting the feeding of the at least one binder or of the at least one colorant, thereby retaining in-specification mixture in the method. The in-specification toner is ground, optionally together with a portion of one or more external additives, classified, and mixed with one or more external additives to obtain the toner having controlled properties.

Abstract: Detection of the presence and amount of an external surface additive such as silica upon the surface of a toner is accomplished by treating the external surface additive with a fluorescent material and exposing the toner to ultraviolet light. This permits accurate quality control over the amount of the external surface additive required for the toner. The toner thus includes a binder resin and a colorant, and at least one external surface additive upon the surface of the toner, wherein the at least one external surface additive contains a fluorescent material. The fluorescent material may be a fluorescein dye.

Abstract: A replenisher material of toner particles and carrier particles, wherein a replenisher ratio of the toner particles to the carrier particles in the replenisher is determined as a function of at least one property of the developer and at least one operational property of an apparatus for developing an electrostatic latent image recorded on an image receiving member, and wherein the apparatus includes a housing defining a chamber having a supply of developer comprised of toner particles and carrier particles therein, a donor member spaced from the image receiving member and adapted to transport toner particles of the developer from the chamber to a development zone adjacent the image receiving member, at least one wire positioned in the development zone between the image receiving member and the donor member, a voltage supply for electrically biasing the at least one wire during a developing operation with a current to detach toner particles from the donor member, forming a cloud of toner particles in the devel

Abstract: A developer of a mixture of carrier particles and toner particles containing at least one binder, at least one colorant, and optionally one or more additives, has a triboelectric value of from 35 to 60 &mgr;C/g, a charge distribution (Q/D) of from −0.5 to −1.0 fC/&mgr;m and the distribution is substantially unimodal and possesses a peak width of less than 0.5 fC/&mgr;m, preferably less than 0.3 fC/&mgr;m, and a conductivity of the developer ranges from 1×10−11 to 10×10−15 mho/cm as measured at 30 V. The carrier particles of the developer preferably have an average particle diameter of 65 to 90 microns and a size distribution wherein 2.0% or less of a total number of carrier particles have a size less than 38 micrometers. The ratio of carrier volume median diameter to toner volume median diameter is about 10:1. The developer finds particular use in devices utilizing hybrid scavengeless development.

Abstract: A process including: blending carrier particles in a fluidized bed jet mill and continuously separating fine particles formed therein from the resulting blended carrier particles.

Abstract: A toner comprised of resin, colorant and a surface additive mixture comprised of two coated silicas, and a coated metal oxide.

Abstract: A process comprising:(a) reactive melt mixing of a base resin with a chemical initiator and crosslinking of said base resin to enable a highly crosslinked precursor resin, said highly crosslinked precursor resin being substantially free of sol, and comprising uncrosslinked portions and crosslinked portions, said crosslinked portions comprised of high density crosslinked microgel particles; and(b) accomplishing dilution by melt mixing said highly crosslinked precursor resin of (a) with a base resin to form a partially crosslinked toner resin, said toner resin being substantially free of sol, and comprising linear uncrosslinked portions and crosslinked portions, said crosslinked portions comprised essentially of high density crosslinked microgel particles, wherein said microgel particles are present in an amount of from about 1 to about 45 percent by weight of said toner resin.

Abstract: A process comprising:(a) reactive melt mixing of a base resin with a chemical initiator and crosslinking of said base resin to enable a highly crosslinked precursor resin, said highly crosslinked precursor resin being substantially free of sol, and comprising uncrosslinked portions and crosslinked portions, said crosslinked portions comprised of high density crosslinked microgel particles; and(b) accomplishing dilution by melt mixing said highly crosslinked precursor resin of (a) with a base resin to form a partially crosslinked toner resin, said toner resin being substantially free of sol, and comprising linear uncrosslinked portions and crosslinked portions, said crosslinked portions comprised essentially of high density crosslinked microgel particles, wherein said microgel particles are present in an amount of from about 1 to about 45 percent by weight of said toner resin.