Canon Kabushiki Kaisha

Makoto Tokudome

Daisuke Baba

Masao Uyama

Norihito Naito

Yuichiro Hirata

Kodai Hayashi

Kuniaki Tamagaki

Takanori Watanabe

Naoki Hayashi

Yoshiyuki Batori

Yu Fukasawa

Ryuta Murakami

Toshiaki Takeuchi

Daisuke Makiguchi

Keisuke Mochizuki

Satoshi Sunahara

Kazuhisa Shida

Takayuki Kanazawa

Shuhei Kawasaki

Yuta Isobe

Shunsuke Mizukoshi

Hideo Kihara

Akihisa Matsukawa

Hiroyoshi Iwayama

Shun Sato

Gosuke Goto

Toshiki Okamura

Motonari Ito

Ryosuke Kanai

An image forming apparatus in which a developer bearing member is disposed below a cleaning member, which cleans a charging member, so as to overlap with the cleaning member when viewed in a vertical direction and includes a base body and an elastic layer covering the base body and having a width in a longitudinal direction of the developer bearing member that accommodates the entire region of the cleaning member in the longitudinal direction. In the longitudinal direction, the cleaning member is disposed at a position where the entire region thereof in the longitudinal direction is accommodated in the width of the elastic layer.

Image forming apparatus, process cartridge, developing cartridge, and drum cartridge

An image forming apparatus includes an image bearing member, a developer bearing member, a fixing unit including a heating member, a rotary member which is heated by the heating member, and a nip area where the rotary member comes into contact with a sheet, and configured to perform fixing by heating a developer image transferred to the sheet and fixing the developer image to the sheet in the nip area, and a control unit configured to execute, while the fixing is not performed, a mode in which the image bearing member is rotated with the developer bearing member being in a separated position and the heating member is controlled such that a temperature of a portion of a surface of the rotary member, after the rotary member passes through the nip area, is maintained higher than the temperature of the portion during the fixing.

Image forming apparatus

An accommodating container includes: an accommodating chamber, provided with an opening, for accommodating a developer; a seal member for unsealably sealing the opening; and a rotatable member rotatably supported inside the accommodating chamber. The seal member includes a sealing portion for sealing the opening, a connecting portion connected with the rotatable member, and at least one hole provided between the sealing portion and the connecting portion. The rotatable member includes a shaft portion and at least one projection extending in a direction of being spaced from the shaft portion. The hole and the projection are provided to establish a non-overlapping positional relationship with respect to a direction along the shaft portion.

Accommodating container, process cartridge and electrophotographic image forming apparatus

A configuration in which an opening is covered with a plurality of partition members is provided, and timings of causing the partition members to move are differentiated, so that torque is reduced.

Developer container, developing device, process cartridge, and image forming apparatus

The disclosed structure includes a belt-shaped conveying member configured to convey developer. The conveying member includes a partitioning portion, which is a partition for developer contained in a casing with respect to a conveying direction in which the developer is conveyed, wherein, when the developer container is new, a first developer amount which is an amount of the developer contained at an upstream side that is upstream of the partitioning portion in the conveying direction, is larger than a second developer amount which is an amount of the developer contained at a downstream side that is downstream of the partitioning portion in the conveying direction.

Developer container, development apparatus, process cartridge, and image forming apparatus

The length of a developer bearing portion of a developing device is longer than the length of a transfer roller in the rotation axis direction of a photosensitive drum. The width of a light irradiation opening of a charge eliminating device is shorter than the length of the transfer roller in the rotation axis direction of the photosensitive drum.

Image forming apparatus that effects removal of residual toner

What is provided is an image forming apparatus in which longitudinal end portions of a developer bearing region or longitudinal end portions of an opening are respectively located outside longitudinal end portions of a transfer bias applicable region.

Developing device, process cartridge, and image forming apparatus

A developing device configured to develop a latent image formed on an image bearing member includes a rotatable developing-agent bearing member configured to bear developing agent, a developing container configured to form a developing-agent storage chamber that stores the developing agent, a developing-agent regulating portion provided in the developing container to regulate an amount of the developing agent born on the developing-agent bearing member, a support portion configured to support the developing-agent bearing member movably relative to the developing-agent regulating portion, and a pressurizing member configured to pressurize the developing-agent bearing member toward the developing-agent regulating portion. A contact portion of the developing-agent regulating portion with the developing-agent bearing member is fixed to the developing container without forming a gap from the developing container on a downstream side in a pressurizing direction of the pressurizing member.

Process cartridge with developing container for an image forming apparatus

Developer container with sealing member having a plurality of holes and rotatable member having a plurality of projections contactable with the sealing member

A process cartridge detachably mountable to an image forming apparatus includes: an image bearing member for forming a latent image; a charging member, press-contacted to the image bearing member at a predetermined urging force, for electrically charging the image bearing member by being supplied with a charging bias; a developing device for developing the latent image by supplying a polymerized toner to the image bearing member; and a cleaning blade for removing the polymerized toner deposited on the image bearing member in contact with the image bearing member. The charging member includes: an electroconductive support; one or more elastic layer formed around the electroconductive support; and projected portions and recessed portions provided on a surface of the charging member. The projected portions are elastically deformable in contact with the image bearing member, leaving electrically dischargeable gaps between the recessed portions of the charging member and the image bearing member.

Process cartridge having projected portions and recessed portions provided on surface of charging member and image forming apparatus thereof

A developer container includes: an accommodating chamber, provided with an opening for permitting discharge of a developer; and developer feeding means. The developer feeding means includes: a rotatable member; a developer feeding member fixed on the rotatable member; a sealing member for opening the opening by the rotation of the rotatable member, wherein one end portion thereof is fixed on the rotatable member and the other end portion thereof is provided so as to seal the opening; and a regulating portion for regulating the sealing member, which is wound about the rotatable member after the opening is opened by the rotation of the rotatable member, so as to expose a feeding surface of the developer feeding member.

Developer container, developing device, process cartridge and image forming apparatus

A developing apparatus includes a developing container for accommodating a developer; a developer carrying member for carrying the developer to a developing zone for developing a latent image; a developer regulator in contact with the developer carrying member to regulate a developer layer thickness on the developer carrying member; a developer feeding member in contact with the developer carrying member to supply the developer to the developer carrying member; an urging member for urging the developer carrying member toward the developer regulator; and a moving mechanism for moving the developer carrying member in a first direction which is a direction in which the urging member urges the developer carrying member and in a second direction crossing with the first direction. The moving mechanism moves the developer carrying member in the second direction to reduce or remove press-contact forces applied by the developer regulator and the developer feeding member.

Moving mechanism for a developing device, process cartridge and image forming apparatus that reduces or removes press-contact forces on a developer carrying member

Small-sized developing device and process cartridge having stable developer regulation

A charging device for electrically charging a photosensitive member includes a charging member for electrically charging the photosensitive member by being supplied with a voltage, and a supporting member for supporting the charging member so as to press-contact to the photosensitive member. The charging member includes an electroconductive support, an elastic base layer supported by the electroconductive support, and an elastic surface layer, provided on a surface of the elastic base layer, being harder than the elastic base layer. The elastic surface layer is provided with projected portions and recessed portions. The projected portions are elastically deformable in contact with the photosensitive member, leaving electrically dischargeable gaps between the recessed portions of the elastic surface layer and the photosensitive member.

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Yokohama, Japan

Makoto Tokudome