Patent ID: 6162570
Filing Date: 2000-12-19
Classification: G03G

Abstract:
An electrophotographic print method for printing a carrier comprising the steps of:providing a photosensitive layer system having an electrode layer and an insulating cover layer, a single photoconductor layer only, a blocking layer arranged between the photoconductor layer and the electrode layer, and an intermediate layer with deep traps for charge bearers arranged between the photoconductor layer and the covering layer said photoconductor layer lying between said blocking layer and said intermediate layer;bringing the layer system into a homogeneous initial state by impression of an electrical field having a polarity in a first direction;exposing the photoconductor layer according to an image having predetermined image structures through the covering layer or through the electrode layer;impressing a second electrical field with a polarity in an opposed direction on the layer system so that a charge image corresponding to the image structures arises in an interior of the layer system;uniformly exposing the entire photoconductor layer through the covering layer or through the electrode layer so that a potential image corresponding to the image structures arises on a surface of the covering layer;in a developing step, applying charged toner particles to the covering layer which settle according to the potential image to form a toner image;subsequently transferring the toner image to the carrier; andgiven an edition greater than 1, carrying out the developing step and the transfer step in multiple fashion while maintaining the electrical charge image present in the interior of the layer system.