Canon Kabushiki Kaisha

Yuta Isobe

Hiroki Tanaka

Kazuhisa Shida

Makoto Fukatsu

Motonari Ito

Kuniaki Tamagaki

Akihisa Matsukawa

Ryosuke Kanai

Takashi Koyanagi

An image forming apparatus includes a developer carrying member that bears and conveys developer. The developer carrying member has at least a base and a surface layer, with the surface layer having an electron donating portion that mainly donates charge to the developer when the developer and the surface layer make frictional contact to exchange charge and an electron accepting portion that mainly accepts charge from the developer when the developer and the surface layer makes frictional contact to exchange charge. A controller applies an AC voltage to the developer carrying member during a period in which an image forming operation is not performed and the developer carrying member is driven, with the AC voltage being different from that applied during an image forming period, and a rotating speed of the developer carrying member during a non-image forming period is slower than that during an image forming period.

Image forming apparatus having toner charging

Growing community of inventors

Meridian, ID, United States of America

Yuta Isobe