Developing apparatus

Abstract

A developing apparatus has a developer carrying body carrying a developer thereon, and a layer thickness regulating member for regulating the layer thickness of the developer carried on the developer carrying body. The developer carried on the developer carrying body contacting with an image bearing body after the layer thickness thereof has been regulated by the layer thickness regulating member. In the developing apparatus, when the charge amount per 1 g of the developer after the layer thickness has been regulated by the layer thickness regulating member and before the developer contacts with the image bearing body is defined as Q (μC/g) and the electrical resistance per axial length 1 mm of the developer carrying body is defined as R (Ω/mm), R≧0.9×(−7.83×104|Q|+7.05×106) and R≦1.1×(−7.83×104|Q|+7.05×106) are satisfied.

Dependencies are inferred from the claim text.