Patent ID: 7769325

Claim:
An image forming apparatus comprising: a developing roller for holding liquid developer; a developing roller cleaning blade adapted to be brought into contact with the developing roller and scrape off the liquid developer held by the developing roller; a reservoir base section for receiving the liquid developer scraped off by the developing roller cleaning blade, the reservoir base section having a recess of a substantial U-shape with an opened top side formed thereon, an arc angle of the recess being not less than 180°; a conveying base section that is continuous with the reservoir base section and has a conveying port formed thereon; a conveying member arranged in the reservoir base section and the conveying base section to convey the liquid developer from the recess to the conveying port by rotating around an axis thereof; and a hollow path continuous with the conveying port, and containing the conveying member in an inside thereof and guiding the liquid developer being conveyed by the conveying member, wherein when a radius of an outer periphery of the conveying member is r 1 and a radius of the conveying port is r 2 , while a radius of curvature of the recess is r 3 , they show a relationship of r 1 <r 2 <r 3 .