Abstract: An electrophotographic copying apparatus is disclosed, including a first rotating cylindrical electrode positioned above the lowest point of rotation of the photoconductive surface and closely adjacent that surface. This first electrode is suitably biased to form a brush of toner which, as the brush rotates with the direction of the travel of the image, develops the image. A second rotating cylindrical electrode is positioned at the low point of travel of the latent image surface; the brush formed on the surface of this electrode as the electrode rotates against the direction of travel of the image, develops the trailing edges of the image. A biased electrode plate extends from the upper electrode to a point near to the lowest electrode. As toner material is supplied to the first rotating electrode, it is carried over the surface of this electrode and flows down through the development path defined by the electrode plate and the rotating drum surface to develop the latent image.