Patent ID: 7773915

Claim:
An image forming apparatus comprising: a plurality of rotatable image bearing members; a plurality of colored toner developing units each having a developer bearing member configured to bear toner and carrier, the colored toner developing units being configured to form a toner image on the image bearing member opposite the developer bearing member; and a transparent toner developing unit having a transparent toner developer bearing member configured to bear transparent toner and carrier, the transparent toner developing unit being configured to form a transparent toner image on the image bearing member opposite the transparent toner developer bearing member, wherein a maximum amount of toner formed by the transparent toner developing unit is larger than a maximum amount of toner formed by at least one of the colored toner developing units, and wherein a rotational direction of the developer bearing members of the colored toner developing units is opposite to a rotational direction of the corresponding image bearing members, and a rotational direction of the transparent toner developer bearing member is the same as a rotational direction of the corresponding image bearing member.