摘要:
An improved process for the development and fixing of electrostatic latent images which comprises (1) generating an electrostatic latent image on a photoconductive imaging member, (2) developing this image with a toner composition comprised of toner resin particles, pigment particles, and a wax component of a molecular weight of from about 500 to about 20,000, (3) transferring the developed image to a suitable substrate, and subsequently (4) fusing the transferred image with a compliant oil fuser roll, wherein the amount of fuser oil consumed is from about one microliter to about three microliters per page of developed image.
摘要:
Disclosed are improved positively charged electrostatic toner compositions comprised of a polyblend mixture of a crosslinked copolymer composition, and a second polymer, pigment particles, a wax component of a molecular weight of from 500 to about 20,000, and a charge enhancing additive. These compositions are particularly useful in imaging systems wherein release oils, such as silicone, are not required.
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:
A negatively charged developer composition comprised of a toner composition with an average particle diameter of from about 4 to about 9 microns containing a mixture of styrene butadiene copolymers, and styrene methacrylate copolymers; pigment particles selected from the group consisting of cyan, magenta, yellow, red, blue, green, brown, and mixtures thereof; first external additive particles of colloidal silica; second external additive particles of fatty acid metal salts; and carrier particles comprised of a ferrite core with a polymeric coating thereover, which coating has dispersed therein conductive particles.
摘要:
This invention is directed to an improved process for developing electrostatic latent images comprising (1) providing a development zone situated between an imaging member and a transporting member, comprised of a stationary shell containing rotating magnets therein, (2) transporting synthetic developer composition into the development zone by causing rotation of the magnets in the stationary shell, (3) effecting movement of the imaging member in a direction opposite to the direction of movement of the rotating magnets, wherein the developer composition is desirably agitated in the development zone by magnetic means, and wherein developer particles are available immediately adjacent the imaging member; the developer particles comprised of toner resin particles and carrier particles comprised of resin particles and magnetite; with the distance between the imaging member and stationary shell being from about 0.1 millimeter to about 1.5 millimeters.
摘要:
Disclosed is a process for forming two-color images which comprises charging an imaging member, creating on the member a latent image comprising areas of high, medium, and low potential, developing the low areas of potential with a developer comprising a specific colored toner and a specific carrier as described herein, subsequently developing the high areas of potential with a developer comprising a specific black toner and a specific carrier as described herein, transferring the developed two-color image to a substrate, and permanently affixing the image to the substrate.
摘要:
This invention is generally directed to an improved positively charged dry electrostatic toner composition comprised of resin particles, pigment particles, a low molecular weight waxy material having a molecular weight of from 500 to about 20,000, and from about 0.5 percent to about 10 percent by weight of a charge enhancing additive selected from the group consisting of alkyl pyridinium halides, organic sulfonate compositions and organic sulfate compositions, of the following formulas: ##STR1## wherein R is a hydrocarbon group containing about 8 to about 22 carbon atoms, and A is an anion, and ##STR2## wherein R.sub.1 is an alkyl group containing from about 12 carbon atoms to about 22 carbon atoms, R.sub.2 and R.sub.3 are independently selected from alkyl groups containing from about 1 carbon atom to about 5 carbon atoms, R.sub.4 is an alkylene group containing from about 1 carbon atom to about 5 carbon atoms, R.sub.5 is a tolyl group or an alkyl group containing from about 1 carbon atom to about 3 carbon atoms, and n is the number 3 or 4.
摘要:
An improved infrared sensitive flash fusible colored toner composition comprised of (1) resin particles, (2) pigment particles selected from the group consisting of cyan, magenta, yellow, blue, red and green, and (3) additives selected from the group consisting of vanadyl phthalocyanines, naphthalocyanines, and the quaternary ammonium salts selected from the group consisting of 1,1',3,3,3',3 hexylmethyl-4,4',5,5'-dibenzo-2,2'-indotricarbocyanine perchlorate, 5,5'-dichloro-11-diphenylamine-3,3'-diethyl-10,12-ethylenethiatricarbocyanine perchlorate, 1,1',3,3,3',3'-hexamethylindotricarbocyanine perchlorate, and 3,3'-di(3-acetoxypropyl)-11-diphenylamine-10,12-ethylene-5,6,5',6'-dibenzothiatricarbocyanine perchlorate.
摘要:
Disclosed is an improved positively charged dry electrostatic colored toner composition comprised of first resin particles; crosslinked second resin particles; colored pigment particles excluding black; and selected from the group consisting of cyan, magenta, yellow, blue, red, and brown; a low molecular weight wax; and a charge enhancing additive selected from the group consisting of alkyl pyridinium halides, organic sulfonate compositions and organic sulfate compositions of the following formulas: ##STR1## wherein R is a hydrocarbon group containing from about 8 to about 22 carbon atoms, and A is an anion; ##STR2## wherein R.sub.1 is an alkyl group of from about 12 carbon atoms to about 22 carbon atoms, R.sub.2 and R.sub.3 are independently selected from alkyl groups containing from about 1 carbon atom to about 5 carbon atoms, R.sub.4 is an alkylene group of from about 1 carbon atom to about 5 carbon atoms, R.sub.5 is a tolyl group or an alkyl group of from about 1 carbon atom to about 3 carbon atoms, and n is the number 3 or 4; and distearyl dimethyl ammonium methyl sulfate, behenyl trimethyl ammonium methyl sulfate, and distearyl methyl ethyl ammonium ethyl sulfate.
摘要:
This invention is directed to improved developer compositions comprised of resin particles, pigment particles, and carrier particles, the improvement residing in the resin particles which are comprised of an uncrosslinked polymer incorporated into a polymer network highly crosslinked in the presence of the uncrosslinked polymer, the uncrosslinked polymer being of a different chemical composition than the crosslinked polymer, thereby resulting in the formation of a sponge-like structure; which developer compositions are useful in electrostatographic imaging systems, including those devices employing cold pressure fixing apparatus.