Abstract: A method of forming an image without cleaning on the basis of repeated electrophotographic process cycles. Each process cycle includes charging a surface of a photosensitive drum to a predetermined polarity, and irradiating the charged surface of the photosensitive drum with light which carries image information, thereby forming a latent image corresponding to the image information. The latent image is visualized by using a dry developer material, and the visualized image is transferred from the surface of the photosensitive drum onto a transfer medium. The developer material contains a transfer accelerator (hydrophobic silica or light-transmitting fine powder) for improving efficiency for transfer of the visualized image onto the transfer medium.

Abstract: The present invention relates to a cleaning apparatus for use in a photocopying apparatus. The cleaning device comprises a grounded conductive fur brush for removing residual toners on a photosensitive drum and a conductive retrieval roll for retrieving the toners caught in the fur brush, a predetermined bias voltage being applied to conductive retrieval roll. The cleaning device further includes a scraping means for scraping the toner transferred to said conductive retrieval roll.

Abstract: The cleaning device includes a conductive fur brush for removing toner remaining on an image carrier, and a conductive retrieval roller for collecting the toner caught by the conductive fur brush. A bias voltage of a polarity reverse to the charged polarity of the toner and the absolute value of which is smaller than 200 V is applied to the conductive fur brush, and a bias voltage of the same polarity as that of the bias voltage applied to the conductive fur brush and the absolute value of which is larger by 200 to 500 V than that of the conductive fur brush is applied to the conductive collective roller.