Wet type electrophotography apparatus to evenly apply developing solution on a developing roller

Abstract

A wet type electrophotography apparatus including a non-volatile, high-viscosity, high-concentration liquid toner as a developing solution. The wet type electrophotography apparatus includes a photoconductive medium on which an electrostatic latent image is formed, a prewetting device for applying a film of a prewetting solution to the surface of the photoconductive medium, a developing device including a developing roller, and a developing solution applying device for applying a film of the developing solution on the developing roller. The developing roller feeds the developing solution to the photoconductive medium by making contact with the photoconductive medium, and causes toner particles in the developing solution to deposit on an image carrier in accordance with an electrical field formed between the developing roller and the photoconductive medium. The developing solution applying device includes a plurality of interconnecting rotating rollers for transporting the developing solution while spreading and applying it on the surface with the rotating rollers, and applies a film of the developing solution on the surface of the final-stage rotating roller in accordance with an electrical field formed between the final-stage rotating roller and the developing roller by a bias voltage fed to the final-stage rotating roller.