Color image forming apparatus

A color image forming apparatus comprising:

• (a) an image forming body having a first surface and a second surface provided on a rear side of said first surface;
• (b) a plurality of chargers each for charging said first surface of said image forming body;
• (c) a plurality of image exposure means each for imagewise exposing said image forming body from said second surface to thereby form an electrostatic latent image on said first surface;
• (d) a plurality of developing means for developing each of the latent images formed on said first surface so that a plurality of different colored toner images are registered on said first surface, said plurality of developing means having a first, a second, a third and a fourth developing units in order along an outer circumference of said first surface of said image forming body, each of said first, second, third and fourth developing units having a developing sleeve for carrying each different colored developer thereon,
• wherein two each of said plurality of developing means are located on both sides with respect to a vertical line which passes through a center of said image forming body,
• and wherein said first, second, third and fourth developing units are located so that the following conditions are satisfied:
• .theta.1 and .theta.4 are from 0.degree. to 20.degree.,
• .theta.2 and .theta.3 are from 45.degree. to 75.degree.,
• where .theta.1 represents an angle between a horizontal line which passes the center of said image forming body and a line connecting the center of said image forming body with a center of said developing sleeve of said first developing unit;
• .theta.2 represents an angle between the horizontal line and a line connecting the center of said image forming body with a center of said developing sleeve of said second developing unit;
• .theta.3 represents an angle between the horizontal line and a line connecting the center of said image forming body with a center of said developing sleeve of said third developing unit;
• and .theta.4 represents an angle between the horizontal line and a line connecting the center of said image forming body with a center of said developing sleeve of said fourth developing unit;
• (e) a transferring means for transferring said plurality of toner images registered on said first surface of said image forming body onto a recording media at one time;
• and
• (f) a cleaning means for cleaning a residual toner on said first surface of said image forming body.