Device for preventing soiling of the trailing end portion of a transfer sheet

Claim 1

In an electrophotographic reproduction device of the transfer-printing type in which an electrostatic latent image is formed on the dielectric surface of an image forming member having a dielectric layer on an electrically conducting material layer, and the dielectric surface of a transfer-printing sheet having a dielectric layer provided on an electrically conducting material layer is brought into intimate contact with the electrostatic latent image bearing surface of the image forming member and then stripped off to effect transfer-printing of the electrostatic latent image on the transfer-printing sheet, the improvement comprising voltage impressing means including a power source for impressing a bias voltage of the same charge as the electrostatic latent image on a portion of the electrically conducting material layer of the transfer-printing sheet, which voltage impressing means is disposed in a position immediately beyond that at which the dielectric layer of the transferprinting sheet is stripped off from the dielectric layer of the image forming member whereby soiling of the trailing end portion of the transfer-printing sheet due to overcharging can be prevented.