Highlight color printing machine

Claim 1

An electrophotographic printing machine adapted to print indicia on a document, including: a moving photoconductive member; means for recording at least two electrostatic latent images on said photoconductive member with one of the latent images being a charged area and the other of the latent images being a discharged area with the charged area latent image being positioned on said photoconductive member before the discharged area latent image in the direction of movement of said photoconductive member; means for developing the charged area latent image with first marking particles and the discharged area latent image with second marking particles having different properties than the first marking particles with the charged area latent image being developed before the discharged area latent image in the direction of movement of said photoconductive member, said developing means includes magnetic means for developing the charged area latent image with the first marking particles, and non-magnetic means for developing the discharged area latent image with the second marking particles, said recording means records the discharged area latent image after said developing means develops the charged area latent image with the first marking particles, said recording means includes means for charging at least a portion of said photoconductive member, means for exposing the charged portion of said photoconductive member to record the charged area latent image thereon, means for recharging said photoconductive member after the charged area latent image is developed; and means for exposing the recharged portion of said photoconductive member to record the discharged area image thereon; means for transferring the first and second marking particles from said photoconductive member to the document; and means for substantially permanently fusing the first and second marking particles to the document to form the indicia on the document.