Chargeless image forming apparatus including toner removal from photoreceptor

An image forming apparatus for forming an image from developer including toner provided with a charge, the image forming apparatus comprising:

• (a) a photoreceptor;
• (b) exposure means for imagewise exposing an inner surface of said photoreceptor during rotation thereof;
• (c) a first developing roller to which a direct current voltage having a polarity the same as that of the toner charge is applied, the first developing roller carrying a developer layer thereon, wherein the first developing roller carries the developer layer into contact with an outer surface of said photoreceptor which has been subjected to the imagewise exposure so that the toner is adhered to a non-exposed portion and an exposed portion of the photoreceptor to form a toner layer on the outer surface of said photoreceptor;
• and
• (d) a second developing roller to which a direct current voltage having a polarity reverse to that of said first developing roller is applied, the second developing roller carrying a developer layer thereon, wherein the second developing roller carries the developer layer into contact with the outer surface of said photoreceptor where the toner layer has been formed so that the toner adhered to the non-exposed portion is removed from the photoreceptor and the toner adhered to the exposed portion remains on the photoreceptor to form the toner image;
• wherein an alternating current voltage superimposed on the direct current voltage is applied to one of the first developing roller and the second developing roller.