POWDER TRANSPORT SCREW, DEVELOPMENT DEVICE, PROCESS UNIT AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a toner transport screw maintaining a smooth and stable transport function.;SOLUTION: There is provided the toner transport screw having a helical blade 34 arranged on the outer circumference of a rotating shaft 33. The helical blade 34 has at least one spiral direction reversal part D formed by connecting the respective ends of a first blade part 36 and a second blade part 37, the directions of spiral of the first blade part and the second blade part being in opposite directions. A passage 35, which allows the toner to pass through the blades 34 in the circumferential direction of the rotating shaft 33, is formed in the spiral direction reversal part D.;COPYRIGHT: (C)2009,JPO&INPIT