Patent ID: 8131191

Claim:
An image forming apparatus, comprising: an image carrying member configured to carry an electrostatic latent image; a developer container configured to contain a developer including a toner and a carrier for charging the toner; a toner carrying member configured to convey a toner to a development region, in which the toner carrying member faces the image carrying member, to develop the electrostatic latent image on the image carrying member; a first developer carrying member configured to carry the developer supplied from the developer container and is disposed facing the toner carrying member to supply the toner included in the developer to the toner carrying member; a first bias voltage source configured to apply to the first developer carrying member a first bias voltage by which a toner is supplied from the first developer carrying member to the toner carrying member; a second developer carrying member configured to carry a developer, and is disposed facing the first developer carrying member and facing the toner carrying member in a region which is upstream, in a direction in which the toner carrying member conveys a toner, from the first developer carrying member so as to collect the toner on the toner carrying member and be supplied with the developer on the first developer carrying member; and a second bias voltage source configured to apply to the second developer carrying member a second bias voltage by which the toner on the toner carrying member is collected onto the second developer carrying member, wherein one of the first developer carrying member and the second developer carrying member is provided with a resistive layer on a surface thereof, and the first bias voltage and the second bias voltage cause a current between the first developer carrying member and the second developer carrying member, through a developer existing between the two developer carrying members, the current between which two developer carrying members is not more than half a current which would flow if the resistive layer did not exist.