Patent ID: 8190072

Claim:
A developing device comprising: a container storing a two-component developer including a toner and a carrier, the toner being a non-magnetic toner and the carrier being a non-magnetic carrier; a toner carrying roller carrying the toner in the container and supplying the toner to a predetermined image carrying body by rotation; a restricting member held in press contact with the toner carrying roller; and a restricting nip section formed between the toner carrying roller and the restricting member, the restricting nip section having a width in a circumferential direction of the toner carrying roller that is expressed as L 1 and a distance between a center of the restricting nip section in the circumferential direction and the leading end of the restricting member being expressed as L 2 , the width L 1 and the distance L 2 being set to satisfy 0.5 L 1 =L 2 ; wherein the restricting nip section selects only the toner in the two-component developer to form a uniform toner layer on the toner carrying roller.