Patent ID: 9098020
Filing Date: 2015-08-04
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a rotatable intermediary transfer member configured to carry a toner image; an image forming station configured to form a toner image on said intermediary transfer member; a rotatable transfer roller urged toward said intermediary transfer member to form a transfer portion; a feeding member configured to feed a recording material to the transfer portion; a voltage source configured to transfer the toner image from said intermediary transfer member onto the recording material fed from said feeding member by applying a transferring current to said transfer portion; a cleaning blade, provided downstream of said transfer portion and upstream of said image forming station with respect to a rotational moving direction of said intermediary transfer member, said cleaning blade configured to remove toner deposited on said intermediary transfer member; an executing portion configured to execute, when said intermediary transfer member and said transfer roller are rotating and the recording material is not present in said transfer portion, an operation in a cleaning mode for removing the toner deposited on said transfer roller to said intermediary transfer member, in which a cleaning current is applied to said transfer portion in a direction opposite to that of the transferring current; and a controller configured to set the cleaning current, wherein upon the execution of the operation in the cleaning mode when a cumulative number of recording materials fed to said transfer portion by said feeding member from a previous execution of the operation in the cleaning mode is a first number or a second number which is smaller than the first number, the controller sets the cleaning current as a first cleaning current if the cumulative number is the first number, and sets the cleaning current as a second cleaning current if the cumulative number is the second number, and wherein the first cleaning current is lower than the second cleaning current.