Canon Kabushiki Kaisha

Cannon Kabushiki Kaisha

Shinichi Sasaki

Isao Ikemoto

Tadayuki Tsuda

Kazushi Watanabe

Shinya Noda

Toshiyuki Karakama

Yoshiya Nomura

Akira Higeta

Kazuyoshi Odagawa

Kazuo Shishido

Hiroyuki Shirai

Akihiro Toma

Kazumi Sekine

Kazunori Kobayashi

Atsushi Numagami

Makoto Tanaka

Shigeo Miyabe

Atsushi Kubota

Yoshikazu Sasago

Masahiko Yashiro

Koji Miura

Kazuhiko Ishiwata

Kanji Yano

Hiroo Kobayashi

Akira Suzuki

Toru Oguma

Shinjiro Toba

Tsutomu Nishiuwatoko

Kouji Hashimoto

Satoshi Kurihara

Takao Nakagawa

Kenshiro Abe

Toshiaki Nagashima

Haruo Uchida

Kazuo Chadani

Yasushi Sato

Hiroomi Matsuzaki

Minoru Sato

Yoshiyuki Batori

Kanji Yokomori

Yasuyuki Ishii

Akira Kuroda

Nobuharu Hoshi

Mitsuru Kurata

Kazumi Umezawa

Fumito Nonaka

Akihiro Nomura

Shinnosuke Taniishi

Katsunori Yokoyama

Tokihide Ebata

Akiyoshi Kimura

Takeo Shoji

Michiro Koike

Hiroaki Miyake

Takeshi Setoriyama

Sohei Tanaka

Takashi Hibi

Norio Hikake

Mototada Toriumi

Sumitoshi Sootome

Ichiro Terada

Kazushi Kitajima

Kiyokazu Namekata

Tsunetoshi Nagata

Ryuji Araki

Kouichi Hiratsuka

Takuji Niizawa

Toshiyuki Karkama

A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The main assembly includes a motor, a gear receiving a driving force from the motor, a hole defined by twisted surfaces substantially coaxial with the gear and having a grounding contact. The cartridge includes an electrophotographic photosensitive drum, and a projection engageable with the twisted surfaces. The projection is provided at a longitudinal end of the drum. When the gear rotates with the hole and projection engaged with each other, a rotational driving force is transmitted from the gear to the drum through engagement between the hole and the projection. The cartridge also includes a grounding contact electrically connected with the drum, for electrically grounding the drum when the cartridge is mounted to the main assembly, and provided on the projection to be electrically connectable with the main assembly grounding contact.

Coupling part, photosensitive drum, process cartridge and electrophotographic image forming apparatus

A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein the main assembly includes a motor, a main assembly side gear for receiving driving force from the motor, a hole defined by twisted surfaces, the hole being substantially coaxial with the gear, and a main assembly side grounding contact provided in the hole, the process cartridge includes an electrophotographic photosensitive drum; process mechanisms actable on the photosensitive drum; and a projection engageable with the twisted surfaces, the projection being provided at a longitudinal end of the photosensitive drum, wherein when the main assembly side gear rotates with the hole and projection engaged with each other, rotational driving force is transmitted from the gear to the photosensitive drum through engagement between the hole and the projection; and a cartridge side grounding contact electrically connected with the electrophotographic photosensitive drum for electrically grounding the electrophotographic photosensitive drum when the process cartridge is mounted to the main assembly of the apparatus, the cartridge side grounding contact being provided on the projection so as to be electrically connectable with the main assembly side grounding contact

A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein the main assembly includes a motor, a main assembly side gear for receiving driving force from the motor, a hole defined by twisted surfaces, the hole being substantially coaxial with the gear, and a main assembly side grounding contact provided in the hole, the process cartridge includes an electrophotographic photosensitive drum; process mechanisms actable on the photosensitive drum; and a projection engageable with the twisted surfaces, the projection being provided at a longitudinal end of the photosensitive drum, wherein when the main assembly side gear rotates with the hole and projection engaged with each other, rotational driving force is transmitted from the gear to the photosensitive drum through engagement between the hole and the projection; and a cartridge side grounding contact electrically connected with the electrophotographic photosensitive drum for electrically grounding the electrophotographic photosensitive drum when the process cartridge is mounted to the main assembly of the apparatus, the cartridge side grounding contact being provided on the projection so as to be electrically connectable with the main assembly side grounding contact.

A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a drum frame for supporting an electrophotographic photosensitive drum and a developing member for developing an electrostatic latent image formed on the electrophotographic photosensitive member; and a developing frame supporting the developing member. The developing frame is provided at a longitudinal end thereof with a projected portion which is projected in a longitudinal direction of the developing member and which is engaged with a guide member. The projected portion is movable along the guide member toward the drum frame, and wherein the developing frame is swingably connected with the drum frame at the other longitudinal end. The developing member is supported on the developing frame for movement in a direction crossing with the longitudinal direction. The cartridge also includes an elastic member for urging the projected portion along the guide portion toward the drum frame.

Process cartridge and electrophotographic image forming apparatus

A bonding method for bonding molded resin products, includes the step of bonding a first one of the molded resin products and a second one of the molded resin products by injecting resin material through a resin material injection path to a bonding portion therebetween, wherein the resin material injection path is formed in one of or both of the first resin material molded product and the second resin material molded product.

Connecting method of resin material molded product, process cartridge and assembling method of process cartridge

A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, wherein the main assembly includes a motor, a main assembly side gear for receiving driving force from the motor and a hole defined by twisted surfaces, the hole being substantially coaxial with the gear, the process cartridge includes an electrophotographic photosensitive drum; process means actable on the photosensitive drum; and a projection engageable with the twisted surfaces, the projection being provided at a longitudinal end of the photosensitive drum, wherein the projection is non-twisted, and when the main assembly side gear rotates with the hole and projection engaged with each other, rotational driving force is transmitted from the gear to the photosensitive drum through engagement between the hole and the projection.

A toner container usable with an electrophotographic image forming apparatus, for containing toner, the toner container includes a first frame of plastic resin material; a second frame of plastic resin material; a bonding portion where the first and second frames are connected with each other by bonding material; a fitting portion, adjacent the connecting portion, where a projection provided in the second frame is fitted into a pit provided in the first frame.

Toner container, development cartridge, and process cartridge

A developing device includes a developing container for accommodating a developer; a developer carrying member, disposed in an opening of the developing container, for carrying a developer; a developer charging member for being contacted to the developer on the developer carrying member and supplied with a voltage of the same polarity as the developer and not less than a discharge start voltage.

Developing charging member supplied with a voltage of a same polarity as that of a developer and not less than a charge starting voltage and a developing charging roller with internal bearing

An electrophotographic image forming apparatus onto which a process cartridge is detachably mountable, for forming an image on a recording medium, has (a) a mounting member for detachably mounting a process cartridge having an electrophotographic photosensitive member, a charging member for charging the electrophotographic photosensitive member, a cartridge charge bias contact for receiving a charging bias to be impressed on the charging member from the main body of the apparatus when the process cartridge is mounted on the main body of the apparatus, and a cartridge-earth contact for connecting the electrophotographic photosensitive member to ground with the main body of the apparatus when the process cartridge is mounted on the main body of the apparatus, (b) a main-body-charge bias contact to be electrically connected to the cartridge-charge-bias contact when the process cartridge is mounted on the mounting member, (c) a main-body earth contact to be electrically connected to the cartridge-earth contact when the process cartridge is mounted on the mounting member, (d) a detecting member for detecting that the process cartridge is not mounted in a cartridge-mounting position by detecting that at least one of the cartridge-charge-bias contact and the cartridge-earth contact is not electrically connected to a corresponding one of the main-body-charge bias contact and the main-body earth contact and (e) a conveying member for conveying the recording medium.

Electrophotographic image forming apparatus, electrophotographic image forming system, and process cartridge

A developing apparatus includes a cylindrical rotatable developer carrying member for carrying a developer to a developing position. A non-rotary insulating magnet roller, provided in the cylindrical developer carrying member. A electroconductive member provided on the magnet roller, the electroconductive member partly constituting a voltage supplying path for supplying a voltage to the developer carrying member. A sliding contact, provided on inside of the developing sleeve, for establishing electric connection between the electroconductive member, and an inside surface of the developer carrying member in the voltage supplying path.

Electrical contact device for developing roller

Growing community of inventors

Fujisawa, Japan

Shinichi Sasaki