Patent ID: 6542710
Filing Date: 2003-04-01
Classification: G03G

Abstract:
A developing apparatus comprising:a developer carrying body for carrying a developer to a developing position, said developer carrying body developing an electrostatic image on an image bearing body with the developer in the developing position; a regulating member for regulating a thickness of a layer of the developer carried by said developer carrying body; and a developer charging member, which is disposed so as to contact said developer carrying body at a downstream side of said regulating member and at an upstream side of the developing position in a developer carrying direction of said developer carrying body, for charging the developer carried by said developer carrying body, a voltage being applied to said developer charging member; wherein a period when a developing action is not conducted by said developer carrying body includes a first period that a first electric field is formed in a direction in which a normally-charged developer moves from said developer carrying body to said developer charging member, and a second period that, after the first period, a second electric field is formed in a direction in which the normally-charged developer moves from said developer charging member to said developer carrying body.