Method of reusing a developing device used in an image-forming device

摘要

A method of reusing a developing device that can be detachably mounted in a body of an image-forming device includes: preparing a used developing device that includes a developer-carrying member (27) that carries a developer thereon, and a gear mechanism having a plurality of gears (59a) that transfer a driving force inputted from the image-forming device to the developer-carrying member; and in order to counter an increasing torque whether from less fluid developer or wear; replacing at least one gear in the gear mechanism with at least one replacement gear (81) that has stronger gear teeth than the at least one original gear, or replacing with a new bearing (90) at least one of the bearings that support a gear shaft (91), or interposing a sliding cylinder between the opposite surfaces of a gear and the periphery of its supporting shaft.