| 摘要 |
PROBLEM TO BE SOLVED: To suppress the occurrence of the deformation and rupture of toner grains, the flocculation of toner and blocking with the toner, and further, the sticking of the toner to the surface of a rotor or a stator, effectively by using a stator consisting of a specific elastic body. SOLUTION: The toner transfer pump 5 is connected to the bottom end of a toner guiding duct 4 and provided with the rotor 24 whose outer periphery is spirally formed and the stator 25 which is arranged/fixed to wrap the rotor 24. The stator 25 is formed like a cylinder having a housing space for the rotor 24 inside and the inner periphery of the stator 25 is formed to a double spiral shape. This inner periphery is contact-engaged with the outer periphery of the rotor 24. The stator 25 consists of the elastic body having a JISA hardness of 60 or below. Thus, when the toner grains pass through between the rotor 24 and the stator 25, a stator part pressurized by the rotor 25 is elastically deformed so that external force exerted on the toner grains is made small. |
