Abstract An electrophotographic apparatus for transferring electrostatic latent images comprising a photosensitive drum consisting of a layer of photosensitive material on a conductive body; an insulating roller normally disposed in contact with said photosensitive drum for the purpose of transferring an electrostatic latent image formed on said layer of photosensitive material to an interposable electrostatic transfer paper consisting of a conductive paper support with an image receiving dielectric layer thereon; at least one set of paper feed rollers disposed in front of and one set disposed to the rear of said insulating roller (the rollers disposed on the side of said dielectric layer consisting of an insulating material while the rollers disposed on the side of said paper support consist of a conductive material) for feeding the electrostatic transfer paper in between said insulating roller and photosensitive drum; and a low-voltage DC power source having one terminal with the same polarity as that of the electric charge to be impressed on the photosensitive layer by corona discharge, and electrically connected with said conductive body of the photosensitive drum, while the other terminal has the opposite polarity and is electrically connected with said conductive feed rollers, said conductive feed rollers being grounded through the chassis of the apparatus and said photosensitive drum being insulated relative to the chassis of the apparatus.
Inventors
👤 J Kurokawa
👤 T Watanabe
👤 T Asami
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-29 17:53
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
223 words
An electrostatic latent image transferring apparatus for use in electrophotography, comprising: a photosensitive drum consisting of a photosensitive layer and a conductive body; an insulating roller disposed in contact with said photosensitive layer for transferring an electrostatic latent image formed by corona discharge and illumination on said photosensitive layer to an interposable electrostatic transfer paper consisting of a conductive paper support with an image receiving dielectric layer thereon; at least one set of paper feed rollers disposed in front of and one set disposed to the rear of said insulating roller, the feed rollers disposed on the side of said dielectric layer having an insulating surface and at least one of the feed rollers disposed on the side of said paper support having a conductive surface, for feeding the electrostatic transfer paper in between said insulating rollers and said photosensitive drum; and a lowvoltage DC power source having one terminal with the same polarity as that of the electric charge of the corona discharge applied to the photosensitive layer and electrically connected with said conductive body of the photosensitive drum and the other terminal having an opposite polarity and electrically connected with the surface of said conductive feed roller, said conductive feed rollers being grounded through the chassis of the apparatus and said photosensitive drum being insulated relative to the chassis of apparatus.
Claim 2
Dependent Claim
223 words
An electrostatic latent image transferring apparatus for use in electrophotography, comprising: a photosensitive drum consisting of a photosensitive layer and a conductive body; an insulating roller disposed in contact with said photosensitive layer for transferring an electrostatic latent image formed by corona discharge and illumination on said photosensitive layer to an interposable electrostatic transfer paper consisting of a conductive paper support with an image receiving dielectric layer thereon; at least one set of paper feed rollers disposed in front of and one set disposed to the rear of said insulating roller, the feed rollers disposed on the side of said dielectric layer having an insulating surface and at least one of the feed rollers disposed on the side of said paper support having a conductive surface, for feeding the electrostatic transfer paper in between said insulating rollers and said photosensitive drum; and a lowvoltage DC power source having one terminal with the same polarity as that of the electric charge of the corona discharge applied to the photosensitive layer and electrically connected with said conductive body of the photosensitive drum and the other terminal having an opposite polarity and electrically connected with the surface of said conductive feed roller, said conductive feed rollers being grounded through the chassis of the apparatus and said photosensitive drum being insulated relative to the chassis of apparatus.
Claim 3
Dependent Claim
18 words
A transferring apparatus according to claim 1, wherein said photosensitive layer of the photosensitive drum consists of selenium.
Claim 4
Dependent Claim
18 words
A transferring apparatus according to claim 1, wherein said photosensitive layer of the photosensitive drum consists of poly-N-vinylcarbozole.
Claim 5
Dependent Claim
22 words
A transferring apparatus according to claim 1, wherein the voltage of said low-voltage DC power source is in the range of 100-500V.
Claim 6
Dependent Claim
22 words
A transferring apparatus according to claim 1, wherein both of said feed rollers on the side of said paper support are conductive.
Claim 7
Dependent Claim
17 words
A transferring apparatus according to claim 1, wherein the surfaces of said insulating feed rollers comprise rubber.