Patent ID: 7742723
Filing Date: 2010-06-22
Classification: G03G

Abstract:
1. A developing device comprising a development roller for developing a latent image, the development roller having an elastic outer layer, a supplying roller that supplies liquid developer to the development roller, and a development roller cleaning blade which is in contact with the development roller to clean the surface of the development roller, the development roller having a toner charger, wherein where θ is an angle of a contact face of the development roller cleaning blade relative to a perpendicular line perpendicular to a generating line of the development roller at a contact point where the tip end of the development roller cleaning blade is pressed against and in contact with the development roller, and a is an angle of a rising contour of a deformed portion of the elastic outer layer which is deformed by the pressure of the development roller cleaning blade against the development roller relative to the perpendicular line, the hardness of the development roller and the attitude of the development roller cleaning blade are set to achieve a relation a>θ.