Xerox Corporation

Paul J Cressman

Richard V LaDonna

P Keith Watson

William W Limburg

Louis A Pilato

An improved photoelectrophoretic imaging method is disclosed wherein a blocking layer is provided with a coating which interacts, in the dark, with the pigment particles of the imaging suspension so as to provide a uniformly charged imaging suspension upon exposure of the suspension to an electric field. The coating material occupies at least a substantially equal position in the Dark Charge Injection Series as any pigment in the imaging suspension. Subsequent or simultaneous electromagnetic radiation to which at least some of the particles are sensitive then results in the formation of optically positive and negative images.

Photoelectrophoresis with dark charge injecting element

An improved photoelectrophoretic imaging method is disclosed wherein the imaging suspension is brought into contact under a first electrical field with a blocking layer having a coating which interacts, in the dark, with the pigment particles of the imaging suspension so as to provide a uniformly charged imaging suspension. The imaging suspension is then exposed to appropriate electromagnetic radiation while under a second electrical field. A second blocking layer, free of said coating is employed to produce positive and negative images.

Photoelectrophoretic imaging process employing dark charge injecting

A liquid to solid addition polymerization imaging method comprises providing between two electrodes, one of which is in imagewise configuration, a polymerizable composition comprising unsaturated vinyl containing compounds; and, in the absence of chemical initiators, catalysts and electrolytes, applying an imagewise configured electrical field across the composition to polymerize the composition.

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Fairport, NY, United States of America

Paul J Cressman