Patent ID: 6212347
Filing Date: 2001-04-03
Classification: G03G

Abstract:
An imaging apparatus comprisingan imaging member with an electrostatic latent image formed thereon, said imaging member containing a surface capable of supporting marking material;an imaging device for generating the electrostatic latent image on said imaging member wherein the electrostatic latent image includes image areas defined by a first charge voltage and nonimage areas defined by a second charge voltage distinguishable from the first charge voltage;a marking material supply apparatus for depositing marking material on the surface of said imaging member to form a marking material layer thereon adjacent the electrostatic latent image on said imaging member;a charging source for selectively delivering charges to the marking material layer in an imagewise manner responsive to the electrostatic latent image on said imaging member to form a secondary latent image in the marking material layer containing image and nonimage areas corresponding to the electrostatic latent image on said imaging member; anda separator member for selectively separating portions of the marking material layer in accordance with the secondary latent image in the marking material layer to create a developed image corresponding to the electrostatic latent image formed on said imaging member, and wherein said marking material is comprised of developer containing an optional liquid, resin, colorant, and a charge acceptance additive of an aluminum complex of the formulas, or mixtures thereof ##STR17##wherein R.sub.1 is selected from the group consisting of hydrogen and alkyl, and n represents the number of R.sub.1 groups, and wherein said charge acceptance additive captures and retains negative ions or positive ions.