Patent ID: 9417566
Filing Date: 2016-08-16
CPC Classification: G03G

Claim Text:
1. An image forming apparatus comprising: a movable intermediary transfer member; first to third toner image forming units arranged in the listed order along a moving direction of said intermediary transfer member from an upstream side toward a downstream side with respect to the moving direction and configured to sequentially form different color toner images on said intermediary transfer member, said first toner image forming unit for forming a first toner image and including a first photosensitive member and a first exposure member configured to form an electrostatic latent image by exposing said first photosensitive member to light with a predetermined exposure amount, said second toner image forming unit for forming a second toner image and including a second photosensitive member and a second exposure member configured to form an electrostatic latent image by exposing said second photosensitive member to light with a predetermined exposure amount, and said third toner image forming unit for forming a third toner image and including a third photosensitive member, a charging member configured to be supplied with a voltage having only a DC component to charge said third photosensitive member in a charge portion, a transfer member configured to form a transfer portion between said third photosensitive member and said transfer member with said intermediary transfer member therebetween; a voltage source configured to apply a voltage to said transfer member to form in the transfer portion an electric field for transferring the third toner image formed on said third photosensitive member onto said intermediary transfer member while passing the first toner image and the second toner image; an execution portion configured to execute an image forming operation for forming an image on a recording material by transferring altogether the toner images sequentially formed on said intermediary transfer member by said first to third toner image forming units; an input portion configured to input an image adjustment setting, the image adjustment setting including a first setting and a second setting; and a control portion configured to set, when the first setting is inputted, a transferring current to a first current and the exposure amounts of said first and second exposure members so as to provide a first maximum toner deposition amount during the execution of the image forming operation by said execution portion, and said control portion being configured to set, when the second setting is inputted, the transferring current to a second current which is greater than the first current and the exposure amounts of said first and second exposure members so as to provide a second maximum toner deposition amount which is smaller than the first maximum toner deposition amount during the execution of the image forming operation by said execution portion.