Patent ID: 6810223
Filing Date: 2004-10-26
Classification: G03G

Abstract:
A developing apparatus in an image forming apparatus having a photosensitive drum with a non-image region, on which a latent electrostatic image is not formed, and an image region, on which the latent electrostatic image is formed, the developing apparatus comprising:a retrieving/auxiliary developing roller being in contact with a circumference of the photosensitive drum, retrieving toner remaining on the non-image region of the circumference of the photosensitive drum on which the latent electrostatic image is not formed, and first developing the image region of the latent electrostatic image; a first toner layer control member uniformly re-distributing and electrifying the retrieved toner on a circumference of the retrieving/auxiliary developing roller; a developing roller having a gap with the circumference of the photosensitive drum, secondly developing the firstly developed latent electrostatic image so as to completely visualize the latent electrostatic image; a supply roller supplying new toner to the developing roller; and a second toner layer control member regularly coating the toner supplied by the supply roller throughout the circumference of the developing roller, and regulating the amount of electrification of the new toner coated on the developing roller.