Patent ID: 8877412

Claim:
An image forming apparatus, which comprises at least: an electrophotographic photoreceptor having at least a conductive support, an undercoat layer provided on the conductive support, containing metal oxide particles and an electron accepting compound having an anthraquinone structure with an amount of the electron accepting compound being from 2 parts by weight to 4 parts by weight with respect to 100 parts by weight of the metal oxide particles, and having a volume resistivity, as measured by an AC impedance method, in a range of 4.5×10 8 Ωm to 9.0×10 8 Ωm, and a photosensitive layer provided on the undercoat layer; a charging device that charges a surface of the electrophotographic photoreceptor in a contact charging mode, in which only DC voltage is applied; an electrostatic latent image forming device that exposes the surface of the charged electrophotographic photoreceptor to form an electrostatic latent image; a developing device that develops the electrostatic latent image by a developer to form a toner image; and a transfer device that directly transfers the toner image from the electrophotographic photoreceptor to a transfer medium; and which does not comprise an erasing device for erasing the surface of the electrophotographic photoreceptor after the toner image is transferred onto the transfer medium by the transfer device and before the surface of the electrophotographic photoreceptor is charged by the charging device.