Patent ID: 7209690
Filing Date: 2007-04-24
Classification: G03G

Abstract:
1. A developing apparatus comprising: a developer carrying member for carrying a developer, the developer carrying member being provided with an elastic layer and adapted to develop, with a developer, an electrostatic image formed on an image bearing member, wherein the developer includes a toner, the toner has a shape factor SF-1 of 100 or more but less than 130, the toner has a storage modulus G′ (140° C.) at 140° C. of 2.0×10 the toner has a temperature, when the toner has a viscosity of 1.0×10 in a surface roughness of the developer carrying member, a center-line mean roughness Ra, a ten-point mean roughness Rz and a mean spacing Sm of irregularities satisfy following relationships (1):