Patent ID: 7043181
Filing Date: 2006-05-09
Classification: G03G

Abstract:
1. An image formation method that develops an electrostatic latent image on a photoreceptor by means of a thin toner layer, which is formed on surface of a developer roller via toner of a magnetic roller and magnetic brush of carrier particles, so as to form an image, said image formation method comprising the steps of: providing the developer roller that is made of aluminum and has an aluminum oxide film of at least 5 μm in thickness formed on surface thereof; setting a gap between the developer roller and a drum of the photoreceptor in a range of 150 to 300 μm; applying a DC voltage superposed with an AC voltage to said developer roller; regulating a frequency of AC voltage in a non-development state to be higher than that in a development state; and selectively making charged toner fly onto the electrostatic latent image for development.