DEVELOPING APPARATUS, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS AND DEVELOPMENT METHOD

摘要

PROBLEM TO BE SOLVED: To suppress mechanical deterioration in a developer/toner and to form a high-quality image even with the lapse of time.

SOLUTION: The developing apparatus (4) is equipped with a developer supply roller (412) which is present extending in parallel with a developer carrying roller (402) and rubs the developer carrying roller to supply a developer, and is provided with a developer conveying member (40) to convey the developer from a developer reserving space (43) to the developer supply roller. The developer conveying member is equipped with: a uniaxial eccentric screw pumping means having a male screw rotor (41) to move the developer along the axial direction by revolving and a female screw stator (42) disposed to enclose the rotor, having an rotary eccentric space for the rotor and brought into contact with the rotor to engage; and an air supply means to allow the developer moved by the screw pumping means to flow in a diffused state.

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