| 摘要 |
<P>PROBLEM TO BE SOLVED: To surely prevent toner from beimg unevenness while reducing component cost and assembling cost. <P>SOLUTION: The developing device is provided with a developing roller 40 disposed in parallel with a photoreceptor drum 171, a screw feeder 30 disposed in parallel with the roller 40 so as to supply the toner to the peripheral surface of the roller 40, and a toner sensor 89 detecting the one-sidedness of the toner inside a developing housing 60 to which the toner is supplied, and the screw feeder 30 is equipped with an inside screw feeder 31 integrally rotating around a feeder shaft 311 and an outside screw feeder 32 parallel with the screw feeder 31 and rotating in an opposite direction to the screw feeder 31. The developing device is provided with a controller 80 performing control that the rotating directions of the screw feeders 31 and 32 may be respectively reversed based on the result of the detection by the sensor 89 when the sensor 89 detects the one-sidedness of the toner. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
