Color electrographic apparatus with developing device having separated toner supply and recovery chambers

A color electrophotographic apparatus comprising:

• a photosensitive member;
• an exposing device for forming an electrostatic latent image on said photosensitive member;
• four developing devices which attach toner on said photosensitive member;
• and
• a transfer member for transferring said toner image onto a printing medium;
• wherein said four developing devices include a yellow image developing device, a magenta image developing device, a cyan image developing device, and a black image developing device;
• wherein each of said four image developing devices include:
• a toner storing chamber for storing toner of a nonmagnetic one-component developer;
• a toner carrying member for forming a toner layer;
• a regulating member for regulating an amount of toner attached to said toner carrying member;
• a toner supply chamber having a supply member therein for supplying toner in said toner supply chamber;
• a toner recovery chamber having a rotating member therein;
• and
• a separating member for separating said toner supply chamber from said toner recovery chamber so that said toner supply chamber is disposable above said toner recovery chamber;
• wherein said photosensitive member moves from a downward direction in a gravity direction to an upward direction in a position facing respective ones of said developing devices.