| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device capable of sufficiently removing the toner filming of a development roller with of simple configuration. SOLUTION: In copying machine 1 provided with a developing device 9 to develop an electrostatic latent image of a photoreceptor drum 3 by toner and a control part 30 to control drive of the developing device 9, in which the developing device 9 is provided with the development roller 21 arranged oppositely to the photoreptor drum 3 and to supply the toner to the photoreceptor drum 3 and a supply roller 19 to form a magnetic brush 22 of a two-component developer T prepared by mixing the toner with a carrier by a built-in magnet 20, and the toner is supplied to the development roller 21 by coming the magnetic brush 22 of the supply roller 19 into contact with the development roller 21, the control part 30 reduces the number of revolution of the supply roller 19 per unit time in comparison with the case of development in the case of non- development. |
