Patent ID: 9158230
Filing Date: 2015-10-13
Classification: G03G

Abstract:
1. A developing device comprising: a developer tank containing a developer; a developing roller disposed in the developer tank in such a way as to be opposed to a photoconductive drum, the developing roller retaining the developer on its outer periphery and supplying a toner included in the developer to a surface of the photoconductive drum; and a cylindrical layer thickness-regulating member fixedly supported by the developer tank in such a way as to be opposed to the outer periphery of the developing roller and to be spaced at a predetermined gap from the outer periphery and regulating a layer thickness of the developer in the form of a layer retained on the outer periphery of the developing roller, wherein the layer thickness-regulating member comprises: a body part provided along an axis line of the developing roller and regulating the layer thickness; a first supporting part having a diameter smaller than that of the body part and provided at one end of the body part to project from the body part and parallel to the body part so as to support the body part at the one end; and a second supporting part having a diameter smaller than or the same as that of the body part and provided at the other end of the body part to project from the body part and parallel to the body part so as to support the body part at the other end, wherein the first supporting part of the layer thickness-regulating member is provided such that a central axis of the first supporting part is configured to be eccentric to a central axis of the body part at a predetermined eccentricity ratio and that the body part tentatively supported by the first supporting part and the second supporting part is appropriately rotated and adjusted by a person to obtain the predetermined gap before the layer thickness-regulating member is fixedly supported by the developer tank.