Canon Kabushiki Kaisha

Fumitaka Aoki

Tetsuo Saito

Kenji Nagata

Hirokazu Ikenoue

Yasushi Sato

Toshihiko Yamanaka

Masahiro Goto

Akihiko Takeuchi

Shunji Nakamura

Hideo Nanataki

Hiroshi Sasame

Kazuo Kishino

Koichi Tanigawa

Hideyuki Yano

Yasumasa Ohtsuka

Hiroto Hasegawa

Atsushi Hosoi

Junji Araya

Akira Hayakawa

Takayasu Yuminamochi

Norio Hashimoto

Yohji Tomoyuki

Kouichi Okuda

An image forming apparatus includes a lower structural body, an upper structural body turnable around a turning shaft between a closed position in which the upper structural body is closed with respect to the lower structural body and an opened position in which the upper structural body is opened upward with respect to the lower structural body, and a developing device which develops, with a developing agent, an electrostatic image formed on a photosensitive drum. The developing device is disposed inside the upper structural body and includes a developing roller rotatable around a rotating axis to bear and transport the developing agent to a developing position and a developing-agent container containing the developing agent. An axial direction of the rotating axis of the developing roller intersects with an axial direction of the turning shaft of the upper structural body. An angle by which the upper structural body is turned from the closed position to the opened position is not more than an angle of repose of the developing agent.

Image forming apparatus

An elastic roller includes a conductive base; an elastic layer on the conductive base; a surface parting layer on the elastic layer, the surface parting layer having a surface resistance of not less than 10.sup.10 ohm; wherein the elastic layer has a volume resistivity of not more than 10.sup.7 ohm.cm.

Elastic roller and fixing apparatus using same

A charging device includes a charging member contactable to a member to be charged. A bias source includes an AC source and a DC source and is effective to apply a bias voltage to the charging member. The bias voltage is provided by a superposing a constant current controlled AC voltage and a constant voltage controlled DC voltage. When a DC voltage is applied between the charging member and the member to be charged, the following equation is satisfied.

Charging device and image forming apparatus

An image fixing apparatus for fixing a toner image on a recording material includes a pair of rotatable members for forming a nip through which the recording material is passed; and bias voltage applying source for applying a bias voltage to at least one of the rotatable members, wherein the bias voltage is automatically changed in accordance with change of an ambient condition.

Image forming apparatus supplied with controllable bias voltage

An image forming apparatus has a device for forming an unfixed image on a support member, a heat fixing device for fixing the unfixed image by applying heat, and a blower for supplying a blast of air to the heat fixing device. The blast area to the heat fixing device by the blower differs depending on the size of the support member.

Fixing device having blower for supplying a blast of air

Growing community of inventors

Tokyo, Japan

Fumitaka Aoki