Murata Machinery, Ltd.

Yoshitaka Taruno

Yuji Suzuki

Takahiro Sasai

Hiroki Takashima

Akihiro Morita

Osamu Hirao

Takashi Miyagawa

When printing, an image forming apparatus determines, based on a threshold voltage corresponding to a print speed during printing, whether or not a corona wire of a charger needs to be cleaned. On the basis of whether or not a monitoring voltage corresponding to a current value of a charged bias, which is applied to the corona wire by a charged-bias high-voltage power supply, is equal to or more than a predetermined threshold voltage corresponding to the print speed during printing, the image forming apparatus determines whether or not the corona wire needs to be cleaned.

Growing community of inventors

Kyoto, Japan

Yoshitaka Taruno