DEVELOPING DEVICE, PROCESSING CARTRIDGE, AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a developing device for reducing temporal deterioration of a developer by optimizing stress applied on the developer, and to provide a process cartridge and an image forming apparatus.

SOLUTION: When dynamic torque of the developing device 23 while the developer G is stored is W1(kgf cm), dynamic torque W0(kgf cm) of the developing device 23 while the developer G is not stored and a mass of toner T in the developer G stored in the developing device 23 is M(g), a condition of 4×10-2<(W1-W0)/M<15×10-2is satisfied.

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