Patent ID: 9110405
Filing Date: 2015-08-18
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: an image bearing member; a charging device which charges the image bearing member to a predetermined potential uniformly; an exposure device which exposes the charged image bearing member to light according to an image signal to form an electrostatic latent image on the image bearing member in accordance with an image; a developing device including a developer carrying member having a bias containing at least a direct current component applied thereto to supply developer to the image bearing member, and developing the electrostatic latent image by supplying the developer from the developer carrying member; an instructing portion which generates an instruction signal for instructing to perform a developer install mode for installing developer in the developing device at a time of non-image formation; and a control portion which adjusts a potential difference between the image bearing member and the developer carrying member in the developer install mode in response to the instruction signal from the instructing portion, wherein, in the developer install mode, the control portion sets an absolute value of a potential on the image bearing member charged by the charging device to a value which is smaller than an absolute value of a potential of the developer carrying member caused by the direct current component of the bias to be applied to the developing device and larger than an absolute value of an image dark section potential on the image bearing member at the time of image formation.