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US 4,053,863 AGranted
Electrophotographic photoconductive plate and the method of making same
AssigneeVarian Associates, Inc.
InventorGuy A. Marlor
Life of this patent
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AssigneeVarian Associates, Inc.
InventorGuy A. Marlor
Estimating the term…
In an electrophotographic camera, a photon image to be recorded is focused through an optically transparent substrate and transparent electrode onto the back surface of a photoconductive layer. The charge-retentive surface of an electrographic recording paper is disposed adjacent the photoconductive layer and the conductive backing of the paper is connected to an electrode for impressing a charge transfer potential across the photoconductor layer and the charge-retentive layer of the paper. When the potential is impressed across the photoconductor, increased conduction caused in the photoconductor by the photon image to be recorded are establish a charge transfer to the charge-retentive surface of the recording paper to form a charge image of the object to be recorded. The charge image is subsequently developed by applying charged toner particles to the image for developing same. The photoconductive layer comprises a substantially continuous layer of electrically interconnected crystals of active photoconductive material coated and bound together with a lead sealing glass interstitially disposed of the interconnected crystals. The resultant photoconductive layer has improved strength and resistance to abrasion while producing acceptable photographic images. The photoconductive layer is produced by heating a stratum including particles of lead sealing glass together with particles of photoconductive material in the presence of a molten solvent and proportions of one or more activators. The sealing glass comprises between about 9% and about 31% by weight of the matrix.
An electrophotographic plate which is capable of forming a charge image pattern in response to and in correspondence with a photon image comprising:
A method for manufacturing a photoconductive layer for an electrophotographic device comprising the steps of:
A sintered photoconductive device capable of use as an electrophotographic plate when a brief and relatively transient direct current flows within it, said device comprising:
In a photoconductive device capable of use as an electrophotographic plate when a brief and relatively transient direct current flows within it, said device including a sintered photoconductive element having pores, the improvement comprising an inorganic, electrically nonconductive, solid impregnant disposed in and partially filling said pores.
In a photoconductive device capable of use as an electrophotographic plate when a brief and relative transient direct current flows within it, said device including a sintered photoconductive element having pores, the improvement comprising an inorganic, electrically non-conductive, solid impregnant disposed in said pores and comprising less than 40% by weight of the total material of said element including said impregnant.
A method for manufacturing an electrophotographic plate comprising the steps of:
An electrophotographic plate suitable for use in simultaneous charge transfer electrophotography, wherein the application of a d.c. voltage produces a brief and relatively transient flow of electrons within said plate, comprising:
Dependencies are inferred from the claim text.