Patent Number: 7,822,356

Title: Image forming apparatus

Abstract: The present invention provides an image forming apparatus in which the cleaning performance of a cleaning brush is preserved over time while affording a smaller apparatus main body. During a print job, toner recovered from a charging roller to a cleaning brush is transferred from the cleaning brush to a cleaning auxiliary roller, thereby preventing excessive accumulation of toner in the cleaning brush. During non print job times, toner accumulated in the cleaning brush is transferred to the charging roller directly and via the cleaning auxiliary roller, whereby the cleaning brush becomes clean while preserving its cleaning performance. Also, toner transferred to the charging roller is transferred to a photosensitive unit is recovered into a developing device, which does away with the need for a dedicated recovery toner holding portion for recovering residual toner, thereby reducing the size of the apparatus main body.

Inventors: Sakagawa; Yoshio (Hyogo, JP), Fujita; Tetsumaru (Hyogo, JP), Nagatomo; Yuji (Osaka, JP)

Assignee: Ricoh Company, Ltd.

International Classification: G03G 15/16 (20060101)

Expiration Date: 2018-10-26 0:00:00