Canon Kabushiki Kaisha

Yu Izaki

Tomoaki Nakai

Yusaku Iwasawa

Masahiro Suzuki

Shun-ichi Ebihara

Takateru Ohkubo

Takamitsu Soda

An image forming apparatus sets, on an image forming unit, one of a first transfer condition that does not cause an image to be formed on a sheet and a second transfer condition that causes an image to be formed on the sheet. The apparatus generates a first reading result by reading the sheet that has passed through the image forming unit set in the first transfer condition, and generates a second reading result by reading the sheet that has passed through the image forming unit set in the second transfer condition. The apparatus detects toner fogging based on the first reading result and a reading result out of the second reading result, the reading result concerning a non-image region in which no image is formed on a surface of the sheet.

Image forming apparatus that detects toner fogging

When executing a job which is a series operations for forming images on a single or a plurality of transfer materials and outputting the transfer material(s), started by a start instruction, a control device switches a polarity of a voltage applied by a first transfer power source in response to a switching of a polarity of a voltage applied by a charging power source, and switches a voltage applied by a second transfer power source from a first voltage to a second voltage which is larger in absolute value than the first voltage.

Image forming apparatus

An image forming apparatus charges toner on a transfer belt by using a first brush and collects the toner, in which a second brush is provided on the upstream side of the first brush, and the amount of inroad of the second brush into the transfer belt is larger than the amount of inroad of the first brush into the transfer belt.

Growing community of inventors

Suntou-gun, Japan

Yu Izaki