Photoelectrophoretic web imaging apparatus

Details Photoelectrophoretic web imaging apparatus Photoelectrophoretic web imaging apparatus

G - Physics

03

G

96/8

G03G 15/00 (2006.01) G03G 17/04 (2006.01)

Patent

CA 1073724

PHOTOELECTROPHORETIC WEB IMAGING APPARATUS ABSTRACT OF THE DISCLOSURE A photoelectrophoretic imaging machine for producing, in a preferred embodiment, full color copies from opaque originals or, alternatively, copies from transparencies. In a preferred embodiment, the formation of photoelectro- phoretic images occurs between two thin injecting and blocking webs at least one of which is partially transparent and the image formed is transferred to a paper web. The injecting and blocking webs may be disposable, thus, cleaning systems are not required. The in- jecting web is provided with a conductive surface and is driven in a path to the inking station where a layer of photoelectrophoretic ink is applied to the conductive web surface. The inked injecting web is driven in a path passing in close proximity to a deposition scorotron at the precharge station and into contact with the blocking web to form the ink-web sandwich at the imaging roller in the imaging zone. The conductive surface of the injecting web is grounded and a high voltage is applied to the imaging roller sub- jecting the sandwich to a high electric field at the same time as the scanning optical image is focussed on the nip or interface between the injecting and blocking webs, and development takes place. The photoelectrophoretic image is carried by the injecting web to the transfer zone, into contact with the paper web at the transfer roller where the image is transferred to the paper web giving the final copy.

249732

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