Electrostatic printing
AssigneeHP Indigo B.V.
InventorsUri Lidai, Shmuel Borenstain
Life of this patent
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Abstract
A method of electrostatic printing may include forming a latent electrostatic image on a surface and transferring a first volume of a charged toner to the latent electrostatic image on the surface. The method may also include transferring a second volume of a charged toner to the surface, such that a toner image including the first volume of charged toner and the second volume of charged toner is formed on the surface, the second volume of charged toner being disposed on the first volume of charged toner. The method may also include transferring the image to a print substrate.
Claims20
A printing device comprising:
- a photoconductive member having a surface to receive a latent electrostatic image;
- a photocharging unit to form the latent electrostatic image on the surface of the photoconductive member;
- a first toner unit to transfer a first volume of a charged toner to the latent electrostatic image on the surface using a first voltage;
- a second toner unit to transfer a second volume of a charged toner to the latent electrostatic image on the surface using a second voltage that is different from the first voltage;
- wherein the first toner unit and the second toner unit transfer toner to the same latent electrostatic image, the second volume of charged toner being disposed on the first volume of charged toner;
- wherein the first or the second voltage is determined based on a desired opacity of a layer of toner to be deposited.
A printing device comprising:
- a photoconductive member having a surface to receive a latent electrostatic image;
- a photocharging unit to form the latent electrostatic image on the surface of the photoconductive member;
- a first toner unit to transfer a first volume of a charged toner to the latent electrostatic, image on the surface using a first voltage,
- a second toner unit to transfer a second volume of a charged toner to the latent electrostatic image on the surface using a second voltage that is different from the first voltage;
- wherein the first toner unit and the second toner unit transfer toner of a same color.
Dependencies are inferred from the claim text.