Imaging apparatuses and processes thereof containing a marking material with a charge acceptance additive of an aluminum complex

An imaging process comprising

• generating an electrostatic latent image on an imaging member with a surface capable of supporting toner particles, wherein the electrostatic latent image includes image areas encompassed by a first charge voltage and nonimage areas encompassed by a second charge voltage distinguishable from the first charge voltage;
• depositing toner particles on the surface of said imaging member to form a toner layer thereon adjacent the image and nonimage areas of the electrostatic latent image wherein said toner particles are generated from a liquid developer;
• selectively delivering charges to the toner layer in an imagewise manner responsive to the electrostatic latent image on said imaging member for forming a secondary latent image in the toner layer with image and nonimage areas corresponding to the electrostatic latent image on said imaging member;
• and
• selectively separating portions of the toner layer from the imaging member in accordance with the secondary latent image in the toner layer for creating a developed image corresponding to the electrostatic latent image formed on the imaging member, and wherein said toner particles are comprised of a resin, colorant, and a charge acceptance component comprised of an aluminum complex of the formulas, or mixtures thereof
• wherein R1 is selected from the group consisting of hydrogen and alkyl, and n represents a number, wherein said charge acceptance additive captures and retains negative ions or positive ions, and further wherein said charge acceptance additive functions to increase the Q/M of said developer, and wherein Q=fCV wherein C is the capacitance of the toner layer, V is the measured surface voltage, and f is a proportionality constant which is dependent upon the distribution of captured charge in the toner layer, and wherein M is the total mass of the toner solids.

An image development apparatus comprising

• means for depositing a layer of marking particles on an imaging member;
• means for creating an electrical discharge in a vicinity of the layer of marking particles on the imaging member to selectively charge the layer of marking particles in response to the electrostatic latent image on the imaging member to thereby create a second electrostatic latent image in the layer of marking particles;
• and
• means for selectively separating portions of the layer of marking particles in accordance with the second latent image for creating a developed image corresponding to the electrostatic latent image formed on the imaging member, and wherein the marking material is comprised of a liquid developer containing a liquid vehicle, thermoplastic resin, colorant, and a charge acceptance agent comprised of an aluminum complex represented by the following formulas, or mixtures thereof
• wherein R1 is selected from the group consisting of hydrogen and alkyl, and n represents a number, and wherein said charge acceptance additive captures and retains negative ions or positive ions, and further wherein said charge acceptance additive functions to increase the Q/M of said liquid developer, and wherein Q=fCV wherein C is the capacitance of the toner layer, V is the measured surface voltage, and f is a proportionality constant which is dependent upon the distribution of captured charge in the toner layer, and wherein M is the total mass of the toner solids.

An imaging apparatus consisting essentially of

• an 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;
• and
• a 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 a liquid, resin, colorant, and a charge acceptance additive of an aluminum complex of the formulas, or mixtures thereof
• wherein R1 is selected from the group consisting of hydrogen and alkyl, and n represents the number of R1 groups, and wherein said charge acceptance additive captures and retains charged ions generated from a corona charging source, and further wherein said charge acceptance additive functions to increase the Q/M of said developer, and wherein Q=fCV wherein C is the capacitance of the toner layer, V is the measured surface voltage, and f is a proportionality constant which is dependent upon the distribution of captured charge in the toner layer, and wherein M is the total mass of the toner solids.

An imaging process consisting essentially of

• generating an electrostatic latent image on an imaging member with a surface capable of supporting toner particles, wherein the electrostatic latent image includes image areas encompassed by a first charge voltage and nonimage areas encompassed by a second charge voltage distinguishable from the first charge voltage;
• depositing toner particles on the surface of said imaging member to form a toner layer thereon adjacent the image and nonimage areas of the electrostatic latent image;
• selectively delivering charges to the toner layer in an imagewise manner responsive to the electrostatic latent image on said imaging member for forming a secondary latent image in the toner layer with image and nonimage areas corresponding to the electrostatic latent image on said imaging member;
• and
• selectively separating portions of the toner layer from the imaging member in accordance with the secondary latent image in the toner layer for creating a developed image corresponding to the electrostatic latent image formed on the imaging member, and wherein said toner particles are comprised of a developer comprised of a resin, colorant, and a charge acceptance component comprised of an aluminum complex of the formulas, or mixtures thereof
• wherein R1 is selected from the group consisting of hydrogen and alkyl, and n represents a number, and wherein said charge acceptance additive captures and retains ions, and further wherein said charge acceptance additive functions to increase the Q/M of both said developer, and wherein Q=fCV, wherein C is the capacitance of the toner layer, V is the measured surface voltage, and f is a proportionality constant which is dependent upon the distribution of captured charge in the toner layer, and wherein M is the total mass of the toner solids, and wherein said toner particles are free of a charge director.