| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus in which degradation of a developer contained in a developing device is suppressed even when printing at a low printing rate is continuously performed. <P>SOLUTION: An image forming apparatus 1 comprises a developing device 2 that forms a toner image on a photoreceptor 11, is supplied with a developer including a carrier and discharges the developer in an amount in accordance with an amount of the supplied developer; and control means 160 that calculates an average printing rate per a prescribed number of printed sheets for controlling an amount of the developer to be supplied to the developing device 2 in accordance with the average printing rate. The control means 160 calculates the amount of the developer corresponding to a printing rate on the basis of the average printing rate, and controls the amount of the developer so that the developer in an amount corresponding to a printing rate may be supplied to the developing device 2 when the average printing rate exceeds a prescribed value and that the developer in an amount beyond the printing rate may be supplied to the developing device 2 when the average printing rate is the prescribed value or lower. <P>COPYRIGHT: (C)2012,JPO&INPIT |
