Patent ID: 6661987
Filing Date: 2003-12-09
Classification: G03G

Abstract:
An image forming apparatus comprising:an image carrier; a latent image forming unit to form latent images on the image carrier; a black developing unit arranged near the image carrier to supply a black developer to the image carrier; and a revolver type developing unit arranged at a position near the image carrier and differing from the black developing unit, comprising developing rollers of plural color developing units which have different color developers arranged at an equal space of a first distance along the circumference of a revolving body in contact with the image carrier, wherein a developing unit at the last part in the revolving direction of the revolving body and a developing unit at the foremost part in the revolving direction are separated at a second distance longer than the first distance, and anyone of the plural color developing units is arranged opposing to the image carrier and supply a respective color developer; wherein an area from the developing unit at the last part of the revolver type developing device to the foremost developing unit separated by the second distance opposing to the image carrier, a black developer is supplied to the image carrier by the black developing unit.