| 摘要 |
<p>IMAGING PROCESS A layer of a suspension of electrically photosensitive particles in an insulating carrier liquid is coated onto a transparent, conductive electrode. A second electrode in roller configuration is caused to traverse the free surface of the suspension while an electrical field is imposed across the suspension between the two electrodes. The imaging suspension is illuminated imagewise ahead of the nip formed by the roller electrode which causes the illuminated electrically photosensitive particles to be drawn into the nip while the particles in dark areas are squeezed off the transparent, conductive electrode. On completion of roller traverse a reversal image is found adhering to both electrodes. By reversal image is meant that electrically photosensitive particles deposit on the electrodes in light struck areas. The process may also be used to increase the efficiency of electrophoretic deposition for conventional photoelectrophoresis For this purpose uniform illulmination is used ahead of the nip during the deposition step causing a majority of the particles to be drawn into the nip thus increasing the final density of images formed by photoelectrophoresis.</p> |
