Xerox Corporation

Lawrence Morton Marks

William Streifer

Robert N Goren

Hugh Murray

A process of imposing an electrical charge on an electrically insulating surface of a moving web wherein a brush electrode contacts the surface. The brush is made up of extremely soft and flexible fiber filaments comprising carbon mounted on a metallic brace which also serves as an electrical contact to supply the brush with d.c. potential whereby the electrically insulating surface is charged to nearly the potential applied to the brush. In order to improve charge uniformity the brush is oscillated in a direction transverse to the direction of web movement.

Charge process with a carbon fiber brush electrode

Apparatus for optically imaging a halftone pattern on a xerographic photoreceptor to produce color copies of a color original. The apparatus includes a phase screen for providing a predetermined halftone pattern, the screen producing substantially the same pattern at the same spatial frequency over the visible light spectrum.

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Mississauga, Canada

Lawrence Morton Marks