초록 ▼

A color electrophotographic apparatus having a photosensitive member, an exposing device for forming an electrostatic latent image on the photosensitive member, four developing devices which attach toner on the photosensitive member and form a toner image and a transfer member for transferring the t

A color electrophotographic apparatus having a photosensitive member, an exposing device for forming an electrostatic latent image on the photosensitive member, four developing devices which attach toner on the photosensitive member and form a toner image and a transfer member for transferring the toner image onto a printing medium. The four developing devices include respectively a developing device for a yellow image, a magenta image, cyan image, and a black image. Each developing device includes a toner storing chamber for storing toner of a nonmagnetic one-component developer, a toner carrying member for forming a toner layer of the toner, a regulating member for regulating an amount of toner attached to the toner carrying member, a toner recovery chamber having an agitating member for agitating recovered toner, and a separating member for separating a toner supply chamber for the toner carrying member from the toner recovery chamber.

대표청구항 ▼

1. 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 form a toner image; and a transfer member for t

1. 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 form a toner image; 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, cyan image developing device, and a black image developing device; and wherein each of said four 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 of said toner; a regulating member for regulating an amount of toner attached to said toner carrying member; a toner recovery chamber having an agitating member for agitating recovered toner; and a separating member for separating a toner supply chamber for said toner carrying member from said toner recovery chamber of toner regulated by said regulating member. 2. A color electrophotographic apparatus according to claim 1, further comprising an intermediate transfer member sequentially forming a toner image on said photosensitive member by said four developing devices, and forming a color image. 3. A color electrophotographic apparatus according to claim 1, wherein said photosensitive member moves from a downward direction in a gravity direction to an upward direction in a position thereof facing said four developing devices. 4. A color electrophotographic apparatus comprising: a photosensitive belt; four developing devices disposed in tiers on one side of said photosensitive belt and storing toner of a nonmagnetic one-component developer; and an intermediate transfer drum disposed on another side of said photosensitive belt; wherein each of said four developing devices comprise a toner supply chamber, a toner carrying member for receiving toner from said toner supply chamber and for forming a toner image on said photosensitive belt, said toner carrying member being moveable from a downward direction in a gravity direction to an upward direction in a position thereof facing said photosensitive belt, and a toner recovery chamber having an agitating member for agitating recovered toner, said toner recovery chamber being separated from said toner supply chamber by a separating member, and respective ones of said four developing devices have a yellow toner, a magenta toner, a cyan toner and a black toner. 5. A color electrophotographic apparatus according to claim 4, wherein said toner recovery chamber is disposed below at least a portion of said toner supply chamber.