摘要:
Disclosed is an improved toner composition comprised of a colorant and a copolycarbonate resin, which toner has an intrinsic viscosity of from about 0.10 to about 0.6 dl/gr. (deciliters per gram) a melt flow temperature (T.sub.f) of from about 70.degree. C. to about 125.degree. C., a flash fusing energy of from about 3 J/in..sup.2 to about 8 J/in..sup.2, (Joules per inch squared), and a glass transition temperature of from about 50.degree. C. to about 65.degree. C.
摘要:
A process for the preparation of stable developer compositions, which comprises treating coated carrier particles with metal salts, or metal salts of fatty acids, and thereafter admixing these particles with a colored toner composition containing metal salts or metal salts of fatty acids, and comprised of resin particles and colored pigment particles, and wherein the salts are present in an amount of from about 0.01 to about 1 percent by weight.
摘要:
Disclosed is a process for generating consistent high quality images comprised of (1) providing a xerographic imaging or printing apparatus; (2) adding thereto a stable two component developer composition comprised of toner composition with an average particle diameter of from about 6 to about 10 microns with resin particles, first pigment particles, second magnetite pigment particles, which are present in a greater amount than the first pigment particles, and blended flow additive particles; and carrier particles consisting of a ferrite core, or a steel core, and a coating thereover selected from the group consisting of terpolymers of styrene, methacrylate, and triethoxysilane; and polymethacrylate, which coating has incorporated therein conductive particles; (3) forming electrostatic latent images or magnetic images in the apparatus; and (4) developing the images formed.
摘要:
Disclosed is an improved, simple, economical process for generating documents, such as personal checks, suitable for magnetic image character recognition, which process comprises generating such documents with conventional xerographic methods in a high speed electronic laser printing device, and wherein there is selected as the developer composition a magnetic toner containing from about 20 percent by weight to about 70 percent by weight of magnetite particles, and from about 30 percent by weight to about 80 percent by weight of toner resin particles of styrene copolymers, such as a styrene butadiene copolymer, a styrene n-butylmethacrylate copolymer, or polyesters, and wherein the carrier particles are comprised of ferrite cores, coated with various polymeric resinous compositions. There can also be included in the developer composition various additives such as collodial silica particles, and charge enhancing additives, and further conductive carbon black or insulating carbon black particles can be incorporated into the carrier polymeric resinous coating.
摘要:
A process for generating consistent high quality colored images for extended periods consisting essentially of (1) providing a xerographic imaging or printing apparatus; (2) adding thereto a stable two-component developer composition comprised of first polymer particles, second polymer particles, and blended flow additive particles and carrier particles; (3) forming electrostatic latent images in the apparatus; and (4) developing the images formed wherein the developer composition retains its triboelectric properties of from about 20 to about 40 microcoulombs per gram for over 500,000 imaging cycles, subject to the provision that the second polymer particles are of a different composition than the first polymer particles.
摘要:
An electrophotographic printing machine in which a magnetic toner image is transferred to a copy sheet from a photoconductive member and fused thereto. The toner image fused to the copy sheet is magnetized and the intensity of the magnetic field generated by the toner image detected to provide a continuous indication of the quality of the toner image fused to the copy sheet.
摘要:
A process for obtaining smudge resistant images and for preventing the deposition of unwanted toner particles in an imaging apparatus which comprises(a) providing a xerographic imaging apparatus,(b) adding an improved two component contamination free developer composition to said apparatus, which composition consists essentially of from about 50 percent to about 80 percent by weight of a resin comprised of the polymeric esterification product of a dicarboxylic acid and a diol comprising a diphenol of the following formula ##STR1## wherein R is selected from substituted and unsubstituted alkylene radicals having from about 2 to about 12 carbon atoms, alkylidene radicals having from 1 to 12 carbon atoms and cycloalkylidene radicals having from 3 to 12 carbon atoms; R' and R" are selected from substituted and unsubstituted alkylene radicals having from 2 to 12 carbon atoms, alkylene arylene radicals having from 8 to 12 carbon atoms and arylene radicals; X and X'; are selected from hydrogen or any alkyl radical having from 1 to 4 carbon atoms; and each n is a number of from 0 (zero) to 4, about 20 percent to about 50 percent by weight of magnetite and a carrier material consisting of a steel core coated with a polymethyl methacrylate resin or a polyvinylidene fluoride resin,(c) forming electrostatic latent images in the imaging apparatus, and(d) developing the images formed.
摘要:
This invention relates to a conductive single component magnetic dry toner comprised of resins selected from polystyrene allyl alcohol copolymers, and epoxy resins, a magnetic material such as magnetite, and a conductive carbon black which is adhered and/or embedded on the surface of the copolymer or epoxy resin-magnetic material mixture. Such toner compositions, which have excellent conductivity, superior flow properties and low melt fusing temperatures, 95.degree. C.-130.degree. C., are useful for causing the development of images in commercial printers and recorders such as the Versatec printers.
摘要:
An improved conductive single component magnetic dry toner composition for use in developing images in electronic printing systems of a conductivity of from 10.sup.-6 to 10.sup.-8 (ohms/cm).sup.-1, and a fusing temperature of from about 95 degrees Centigrade to about 130 degrees Centigrade, and comprised of a magnetic material present in an amount of from about 40 percent by weight to about 80 percent by weight, and from about 20 percent by weight to about 60 percent by weight of a polyester resin, comprised of the polymeric esterification product of a dicarboxylic acid and a diol comprising a diphenol of the formula: ##STR1## wherein R is selected from substituted and unsubstituted alkylene radicals containing from about 2 to about 12 carbon atoms, alkylidene radicals containing from 1 to about 12 carbon atoms, and cycloclkylidene radicals containing from about 3 to about 12 carbon atoms; R' and R" are selected from substituted and unsubstituted alkylene radicals containing from about 2 to about 12 carbon atoms, alkylene arylene radicals containing from about 8 to about 12 carbon atoms and arylene radicals; X and X' are selected from hydrogen or alkyl radicals containing from 1 to about 4 carbon atoms; and each n is a number of from 0 (zero) to 4, a conductive carbon black present in an amount of from about 0.5 percent to about 4 percent, which carbon black is adhered to or embedded in the surface of the polyester magnetic mixture.