Browse Prior Art Database

Original Publication Date: 1979-Aug-31
Included in the Prior Art Database: 2004-Apr-02

Publishing Venue

Xerox Disclosure Journal


This disclosure relates to a novel copying process that combines features of lithography, thermography and xerography. Photoreceptor drum cleaning is unnecessary because there Is 100 percent transfer of the ink similar to a lithographic process. However, the need to make a master (as In lithography) is circumvented by the use of xerographic imaging by exposing a selenium photoreceptor to a suitable image. Development of the Image occurs by a liquid development technIque simIlar to that dIsclosed by R. W. Gundlach In U.S. Patent No. 3,084,043. Thermography is used to change the viscosity of a lithographIc Ink to that resembling a liquid developer suitable for polar liquid development. Selective ink transfer in development is achieved by reducing ink cohesion force by means of the application of heat to the ink film during development to lower than the electrostatic force of the image.