Patent ID: 6416916
Filing Date: 2002-07-09
Classification: G03G

Abstract:
A developer comprising toner particles and carrier particles, wherein the developer has and maintains a flow rate of at least about 2 cm3/min and the toner particles comprise at least one binder, at least one colorant, and an external additive package comprised of zinc stearate and at least one of silicon dioxide or titanium dioxide, wherein the zinc stearate is present in an amount of from greater than 0 to no more than about 0.1 percent by weight of the toner, wherein further the toner particles have a size distribution such that no more than about 8% of a total number of particles have a size less than about 5 microns and no more than about 1% of a total volume of toner particles have a size greater than about 16 microns, and the carrier particles are substantially free of copper and zinc and are coated with a coating comprising a polyvinylidenefluoride polymer or copolymer and a polymethyl methacrylate polymer or copolymer.