A TRANSPARENCY COPYING MACHINE
Original Publication Date: 1977-Aug-31
Included in the Prior Art Database: 2004-Mar-30
Xerox Disclosure Journal
The optical system of an electrophotographic printing machine comprises a screen 22 positioned prior to or subsequent to the path of the light image. Light source 20 projects light rays through screen 22 forming a light image of a screen pattern which irradiates the charged portion of photoconductive sur-face 12 to record a screen pattern thereon. The screen pat-tern moves in the direction of arrow 14 so as to enable the combined light image of composition frame 38 and transparency 24, to be projected in superimposed registration therewith. The resultant electrostatic latent image formed on photocon-ductive surface 12 is modulated.