Liquid electrophotographic developing apparatus using electrodes to charge toner particles

A liquid electrophotographic developing apparatus, comprising:

• a plurality of developing units, each having electrodes formed within an elongated opening, each of the plurality of developing units being disposed adjacent to a moving image-bearing surface which provides liquid developer through an electric field generated by the respective electrodes of the developing unit onto the image-bearing surface of a photoreceptor which passes adjacent to the plurality of developing units in succession, for converting an electrostatic latent image into a toner image;
• each of the plurality of developing units containing a liquid developer of a different color;
• and
• a plurality of air transport members, provided around the elongated opening of each of the developing units, the air transport members containing air flow therein having a predetermined air pressure to transport unused liquid developer away from the image-bearing surface while permitting toner particles in the liquid developer electromagnetically attracted to the image-bearing surface to be retained by the image-bearing surface.