US Patent 7853171 Developing apparatus and image forming apparatus provided therewith

A developing apparatus is provided with: a developing roller; and a recovering roller that is arranged so as to oppose the developing roller, recovers scattered toner, and stores negatively chargeable toner, wherein the recovering roller has its surface coated with a fluorine resin or a silicone resin, and is provided with a blade that removes the scattered toner, and a difference (A−C) between a work function (A) of the resin and a work function (C) of the blade is greater than or equal to 0.10 eV.