Electrophotographic color proofing element and method for using the same
US4600669A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1985 |
| Grant date | Jul 15, 1986 |
| Priority date | — |
| Expiry date | Sep 6, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G13/01
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophotographic proofing element is described comprising a photoconductive layer on an electrically conducting substrate, capable of transmitting actinic radiation to which the photoconductive layer is responsive, and a dielectric support, releasably adhered to the substrate, comprising the photoconductive layer or an overcoat thereof forming a surface of the element capable of holding an applied electrostatic charge. To use the element, the surface of the dielectric support is charged, and the photoconductive layer is imagewise-exposed to actinic radiation, thereby forming a developable electrostatic image on the dielectric surface. The electrostatic image, in turn, is developed with toner to form a first color image. A composite color image is formed on the element by repeating the sequence one or more times with imagewise exposure of the photoconductive layer to actinic radiation transmitted through the transparent support, and developing over each preceding image with a different color toner. The composite toner image is transferred with the dielectric support to a receiving element to form a color copy such as a three-color filter array or a color proof closely simulati…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.