Highlight color printing
AssigneeXerox Corporation
InventorMichael J. Langdon
Life of this patent
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Abstract
An electrophotographic printing machine in which indicia are printed on a sheet in at least two different colors. An electrostatic latent image is recorded on a photoconductive member and developed with a liquid developer material of one color. The latent image is neutralized and ions projected onto the photoconductive member in an image wise pattern to record another latent image. This latent image is developed with a liquid developer of another color. Both liquid images are transferred substantially simultaneously to a sheet to print indicia in two colors thereon.
Claims17
An electrophotographic printing machine in which indicia are printed on a sheet in at least two different colors, including:
- a photoconductive member;
- means for recording a first electrostatic latent image on said photoconductive member;
- first means for developing the first electrostatic latent image with a liquid developer material of a first color to form a first color liquid image on said photoconductive member;
- means for substantially neutralizing the first electrostatic latent image recorded on said photoconductive member after said first developing means develops the first electrostatic latent image;
- means for projecting ions in an image wise pattern onto said photoconductive member to record a second electrostatic latent image thereon;
- means for developing the second electrostatic latent image with a liquid developer material of a second color to form a second color liquid image on said photoconductive member with the second color liquid image being a different color than the first color liquid image;
- and
- means for transferring substantially simultaneously the first color liquid image and the second color liquid image from said photoconductive member to the sheet to print indicia in two colors thereon.
A method of printing indicia on a sheet in at least two different colors, including the steps of:
- recording a first electrostatic latent image on a photoconductive member;
- developing the first electrostatic latent image with a liquid developer material of a first color to form a first color liquid image on the photoconductive member;
- neutralizing the first electrostatic latent recorded on the photoconductive member after the first color liquid image has been developed thereon;
- projecting ions in an image wise pattern onto the photoconductive member to record a second electrostatic latent image thereon;
- developing the second electrostatic latent image with a liquid developer material of a second color to form a second color liquid image on the photoconductive member with the second color liquid image being of a different color than the first color liquid image;
- and
- transferring substantially simultaneously the first color liquid image and the second color liquid image from the photoconductive member to the sheet to print indicia in two colors thereon.
Dependencies are inferred from the claim text.