| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide: a screw capable of improving mixability of two or more kinds of powder in a rotary shaft direction; a developing device provided with the screw; an image forming apparatus including the developing device; and a process cartridge. <P>SOLUTION: The screw has a rotary shaft supported to be rotatable, and a spiral blade protrusively provided spirally on a circumferential surface of the rotary shaft, and conveys the powder in the rotary shaft direction while stirring the powder by the spiral blade with rotation of its own, wherein the spiral blade waves within one pitch of the spiral blade. <P>COPYRIGHT: (C)2011,JPO&INPIT |
