Canon Kabushiki Kaisha

Fuji Xerox Co., Ltd.

Yuichiro Inaba

Ryuta Murakami

Masaaki Sato

Kenichi Iida

Tadashi Horikawa

Shunsuke Uratani

Akitoshi Toyota

Norihiro Matsumoto

Koji Fujinaka

Tomio Noguchi

Hiroshi Takarada

Tsuyoshi Ogawa

Tetsuji Suzuki

Takao Sameshima

Kenji Matsuzaka

Takeo Kawanami

Toshiyuki Watanabe

Akinori Mitsumata

Yoshihiro Ito

Susumu Nittani

Kazuhiro Doda

Masaru Shimura

Shinji Katagiri

Koji Wada

Satoru Takahashi

Keisuke Ishizumi

Shunsuke Hijikata

Kenji Kanari

Takehiro Hayashi

Hiromi Sakurai

Akira Yoshimura

Shuichi Tetsuno

Shigeru Hoashi

Osamu Sasaoka

Shohei Ishio

Yasuhiro Fukase

Eiichiro Kimizuka

Masaaki Takeuchi

Masatoshi Takiguchi

Fuyuko Koyama

Keisuke Shinoda

Mitsuru Ebihara

Masaki Sudo

An image forming apparatus includes a housing configured to accommodate an image forming unit that forms an image on a recording material, a discharge unit configured to discharge the recording material to the outside of the housing, and a motor disposed inside of the housing and configured to drive the image forming unit. The housing includes a stacking unit on which the recording material discharged by the discharge unit is stacked and a wall surface provided at an end of the stacking unit in a width direction that is perpendicular to a vertical direction and a discharge direction of the discharge unit, and the wall surface extends upward beyond the stacking unit. The motor is disposed at a position that overlaps the wall surface as viewed in the width direction.

Image forming apparatus

An image forming apparatus includes a developer container to and from which a replenishment container is attachable and detachable and which includes an accommodating portion that accommodates developer and a replenishment port, an agitation member, an opening/closing member configured to be movable between a closed position and an open position, a drive source for driving the agitation member, and a control portion configured to control the drive source. The apparatus is configured such that image formation is not possible when the opening/closing member is at the open position, and the agitation member is capable of driving in a case where the opening/closing member is at the open position.

An image forming apparatus includes a developer container having an accommodating portion to accommodate developer, and a replenishment port for replenishing the accommodating portion with developer from an attachable replenishment container. A transfer portion transfers the developer image on an image bearing member onto a recording material, a supporting tray supports the recording material, and a discharge portion discharges the recording material on the supporting surface. The supporting tray has an opening portion opening with the replenishment port being exposed through the supporting surface, wherein an opening/closing member is movable between a closed position where it covers the replenishment port and serves as a part of the supporting surface and an open position where the replenishment port is exposed. Movement of the opening/closing member to the closed position is hindered by the replenishment container in a state it is attached to the developer container.

Image forming apparatus having toner replenishment

A transfer unit transferring a developer image onto a transfer medium includes: (1) an image bearing member on which the developer image is formed; (2) a cleaning member provided to extend in a width direction of the image bearing member to abut thereagainst, and remove developer on the image bearing member; and (3) a seal member that prevents the developer removed by the cleaning member from leaking outside the transfer unit. The seal member opposes a tip portion of the cleaning member. In the transfer unit, a first unit is provided with the image bearing and cleaning members, and a second unit is provided with the seal member and can engage with the first unit. The second unit engages with the first unit so that the seal member abuts against the cleaning and image bearing members.

Transfer unit, image forming apparatus, and method for manufacturing transfer unit, with end seal member abutting against cleaning blade and intermediate transfer belt that abut against each other

An image forming apparatus includes a developer container to and from which a replenishment container is attachable and detachable, the developer container including an accommodating portion, and a supporting portion, wherein the developer container includes a projection portion that is provided at one end portion thereof in the rotation axis direction of the developer bearing member and projects toward the supporting portion more than a center portion of the developer container in a crossing direction crossing the rotation axis direction, the projection portion communicates with the accommodating portion and includes, at a distal end portion thereof, an attachment portion configured such that the replenishment container is attachable thereto in a state of being exposed to the outside of the apparatus, and a replenishment port for replenishing the accommodating portion with developer from the replenishment container is defined in the attachment portion.

Image forming apparatus having an opening/closing member that is prevented from closing when a replenishment container is attached to a process unit

A process cartridge includes a frame and a photosensitive drum supported by the frame, with the photosensitive drum being rotatable about an axis thereof. A coupling is operatively connected to the photosensitive drum such that a driving force can be transferred from the coupling to the photosensitive drum. A developing roller is supported by the frame, with the developing roller being rotatable about an axis thereof. A gear is positioned at a side of the process cartridge, with the gear being rotatable about an axis thereof. The gear has a plurality of teeth, with at least some of the teeth being exposed teeth that are uncovered by the frame and exposed to outside of the process cartridge, and with a tip of at least one of the exposed teeth facing the axis of the photosensitive drum. As measured in the axial direction of the photosensitive drum, the teeth of the gear are shorter than the projection of the coupling.

Process cartridge and electrophotographic image forming apparatus

An apparatus includes a developer container to and from which a replenishment container is attachable and detachable and which includes an accommodating portion and a replenishment port, a transfer portion configured to transfer a developer image on an image bearing member onto a recording material, a supporting tray including a supporting surface configured to support the recording material thereon, and a discharge portion configured to discharge the recording material, onto which the developer image has been transferred, on the supporting surface, wherein the supporting surface has an opening portion opening such that the replenishment port is exposed through the supporting surface, and wherein an opening/closing member configured to be movable between a closed position where the opening/closing member covers the replenishment port and serves as a part of the supporting surface and an open position where the replenishment port is exposed is provided.

A belt unit, for use in an image forming apparatus, includes an endless belt that moves in a movement direction, a transfer member, a collecting member, a storage container, and a conveyance member. The conveyance member conveys toner in a conveyance direction, rotates about a rotational axis extending in a rotational axis direction, includes a shaft and a conveyance portion provided on a shaft outer surface, and has a helical shape having a helical axis extending in the rotational axis direction. The conveyance member further includes a protruding portion protruding from the shaft outer surface in a direction crossing the conveyance member rotational axis, which has a shape different from the helical shape, and which is provided on a shaft portion downstream of the conveyance portion in the conveyance direction. The rotational axis direction is a direction crossing both the endless belt movement direction and a transfer member longitudinal direction.

Transfer unit and image forming apparatus

A process cartridge includes a photosensitive drum supported by the frame. A coupling is operatively connected to the photosensitive drum such that a driving force can be transferred from the coupling to the photosensitive drum, and a developing roller is supported by the frame. A first gear is operatively connected to the photosensitive drum and the developing roller such that the driving force can be transmitted from the coupling to the developing roller. A second gear is positioned at a side of the process cartridge, with the second gear having a plurality of teeth, with at least some of the teeth being exposed teeth that are uncovered by the frame and exposed to outside of the process cartridge, and with a tip of at least one of the exposed teeth facing an axis of the photosensitive drum.

A driving-force transmission member includes a coupling portion that includes a driving-force transmission surface and that transmits a driving force to a cartridge coupling, a first helical gear portion that engages with a driven gear of a cartridge to transmit the driving force, and a second helical gear portion that engages with a drive gear to receive the driving force. The portions rotate integrally with each other when the driving-force transmission member rotates about the axis of rotation. The driving-force transmission surface is shaped with a twist in the same direction as the driving-force transmission member. Helical teeth of the first helical gear portion are shaped with a twist in the same direction as the driving-force transmission surface. Helical teeth of the second helical gear portion are shaped with a twist in a direction opposite to the twist direction of the helical teeth of the first helical gear portion.

Electrophotographic image forming apparatus

A process cartridge includes a frame, a photosensitive drum supported by the frame, and a developing roller supported by the frame. A coupling is operatively connected to the photosensitive drum, with the coupling being rotatable about an axis thereof, and with the coupling being positioned (i) at a first end of the photosensitive drum, (ii) coaxial with the photosensitive drum, and (iii) at a side of the process cartridge. A helical gear is positioned at the side of the process cartridge, the helical gear being rotatable about an axis thereof, the helical gear having a plurality of teeth, with at least some of the teeth being exposed teeth that are uncovered by the frame and exposed to outside of the process cartridge. As measured in an axial direction of the photosensitive drum, at least a part of the exposed teeth of the helical gear is positioned farther from the second end of the photosensitive drum than a tip of a projection of the coupling is positioned from the second end of the photosensitive drum.

An image forming apparatus includes an image bearing member, a belt, a development unit having a development member in contact with the image bearing member to develop an electrostatic latent image formed on the image bearing member using toner, and a collection unit having a contacting member in contact with the belt to collect toner remaining on the belt adjacent to the contacting member. If condensation is detected inside the image forming apparatus, the image forming apparatus performs predetermined control to separate the development member from the image bearing member and drive the belt in such a manner that the belt moves at a second surface speed different from a first surface speed while driving the image bearing member in such a manner that the image bearing member rotates at the first surface speed in a state where the image bearing member is in contact with the belt.

Image forming apparatus with condensation control

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Chigasaki, Japan

Yuichiro Inaba