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Abstract

A method and apparatus for producing high quality liquid toner images in an electrostatic printing machine. The method using the apparatus includes (a) forming in a first stage, an initial developed toner image on a photoreceptor using toner image forming assemblies including a charging device; and exposure device; a development unit;; and (b) refining in a second stage, the initial developed toner image using a contact electrostatic printing (CEP) assembly including a bias source and a conductive CEP roll for biasing and applying compressive and tensile forces to the initial developed toner image to enable easy separation of image areas from background areas of the initial developed toner image, and for separating and removing unwanted toner solids from the background areas, thereby producing a high quality final toner image having sharp image area edges and highly clean background areas.

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First Claim