The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 1983
Filed:
Oct. 13, 1981
Joseph Y Chu, Norwalk, CT (US);
Xerox Corporation, Stamford, CT (US);
Abstract
This invention is directed to a layered organic photoresponsive device, and a method of highlight color imaging, the device being comprised of (1) a supporting substrate, (2) a layer of material capable of injecting holes into a layer on its surface, this layer being comprised of a material selected from the group consisting of carbon dispersed in a polymer, and graphite dispersed in a polymer, (3) a hole transport layer in operative contact with the layer of hole injecting material, which transport layer comprises a combination of a highly insulating organic resin having dispersed therein small molecules of an electrically active material, the combination of which is substantially nonabsorbing to visible light but allows injection of photogenerated holes from a photogenerating layer in contact with the hole transport layer, and electrically induced holes from the layer of injecting material, (4) a red sensitive charge carrier photogenerating layer sensitive to wavelengths ranging from about the visible range to about 620 millimicrons, said layer being transparent to light of wavelengths of greater than 620 millimicrons, (5) a top layer of a photoconductive material sensitive only to relatively short wavelengths ranging from about the visible range to about 620 millimicrons, said layer being transparent to light of wavelengths of greater than 620 millimicrons. Highlight imaging is accomplished by subjecting the above device to negative charges, followed by subjecting the device to positive charges, imagewise exposing the member, and developing with a colored developer composition comprised of positively charged toner components and negatively charged toner components, and carrier particles.