Patent ID: 9348267
Filing Date: 2016-05-24
CPC Classification: G03G

Claim Text:
1. An image forming apparatus comprising: a movable intermediary transfer member; an image forming unit configured to form a toner image on said intermediary transfer member; a transfer member, to which a first transfer voltage and a second transfer voltage can be applied, configured to transfer the toner image from said intermediary transfer member onto a recording material passing through a transfer portion formed between said transfer member and said intermediary transfer member; a cleaning member, to which a first cleaning voltage and a second cleaning voltage can be applied, configured to remove toner on said intermediary transfer member passing through a cleaning portion formed between said cleaning member and said intermediary transfer member; an executing portion capable of executing an operation in a lowering mode, in which the transfer voltage applied to the transfer member is changed from the first transfer voltage to the second transfer voltage lower in absolute value than the first transfer voltage, at a timing when a position of the recording material spaced from an upstream end portion of the recording material by a predetermined distance toward a downstream side with respect to a recording material feeding direction passes through the transfer portion; and a setting portion configured to set a first cleaning voltage and a second cleaning voltage such that an absolute value of the second cleaning voltage is higher than an absolute value of the first cleaning voltage, wherein in a case that the recording material passes through the transfer portion in the lowering mode, the first cleaning voltage is applied to said cleaning member when a region of said intermediary transfer member, which passed through the transfer portion when the first transfer voltage was applied to said transfer member during passing of the recording material through the transfer portion, passes through the cleaning portion, and the second cleaning voltage is applied to said cleaning member when a region of said intermediary transfer member, which passed through the transfer portion when the second transfer voltage was applied to said transfer member during passing of the recording material through the transfer portion, passes through the cleaning portion.