Patent 7485400 was granted and assigned to Xerox on February, 2009 by the United States Patent and Trademark Office.
A developer includes a carrier and a toner, wherein the toner contains toner particles of at least one binder, at least one colorant, and external additives, wherein the developer has a trimmer clogging value in relation to toner triboelectric charge and toner cohesion expressed according to the equation(−0.80+0.039×(% toner cohesion)+0.026×(toner triboelectric charge) (μC/g))of less than or equal to about 3.2.