Patent ID: 7747197

Claim:
An electrophotographic image forming apparatus, comprising: a photoreceptor, a corona charger configured to charge the surface of the photoreceptor, an irradiator configured to irradiate the surface of the photoreceptor with imagewise light to form an electrostatic latent image thereon, at least one image developer configured to develop the electrostatic latent image with a developer comprising a toner to form a toner image on the surface of the photoreceptor, and a transferer configured to transfer the toner image onto a transfer material; wherein the photoreceptor comprises: an electroconductive substrate, and a photosensitive layer located overlying the electroconductive substrate, comprising a charge generation material and a charge transport material, wherein the charge transport material has the following formula (1): wherein R1 and R2 independently represent a hydrogen atom, or a group selected from the group consisting of substituted and unsubstituted alkyl groups, substituted and unsubstituted cycloalkyl groups, and substituted and unsubstituted aralkyl groups; and R3, R4, R5, R6, R7, R8, R9, and R10 independently represent a hydrogen atom, a halogen atom, or a group selected from the group consisting of cyano groups, nitro groups, amino groups, a hydroxyl groups, substituted and unsubstituted alkyl groups, substituted and unsubstituted cycloalkyl groups, and substituted and unsubstituted aralkyl groups.