Patent ID: 7003248

Claim:
A liquid developing device comprising: at least one developer carrier which carries a highly viscous and highly concentrated liquid developer consisting of a carrier liquid and toner dispersed therein; and an applying member which applies said liquid developer to said developer carrier, said liquid developing device for developing a latent image formed on a latent image carrier by said liquid developer carried on said developer carrier, further comprising: at least one sweep roller formed of an elastic body for removing excess developer on said latent image carrier after development, located downstream said developer carrier in a direction in which the surface of said latent image carrier moves; a nip forming unit which forms a nip between said sweep roller and said latent image carrier; a sweep voltage applying unit which applies a sweep voltage to said sweep roller; a rotation driving unit which drives to rotate said sweep roller; a contact/separation unit which brings said sweep roller into contact with and separates said roller from said latent image carrier; and a cleaning unit which cleans said sweep roller, wherein an elastic constant of a material for said cleaning unit is within a range from 100 MPa to 5000 MPa.