Canon Kabushiki Kaisha

Masanobu Kanoto

Yutaka Kikuchi

Kazuhide Kudo

Masayoshi Fukatsu

Takashi Kuwata

Yasuyoshi Hayakawa

Yoshinori Sugiura

Hiroki Yamaguchi

Kazushige Sakurai

Masao Amano

Eiichiro Kimizuka

Hitoshi Fujino

Makoto Nishigaki

Yuji Takahashi

Atsushi Sano

Yasuo Suzuki

Daisuke Yamamoto

Shigeru Ueda

Hiroo Ichihashi

Hideshi Kawaguchi

Jun Saito

Masao Ando

Kiyoharu Yoshioka

Toshio Yoshimoto

Tadashi Yagi

Shin Komori

Ichiro Ohsawa

Yoshifumi Endo

Hideki Sato

A sheet discharge device includes a discharge roller, a first roller configured to form a first nip portion by contacting the discharge roller, a second roller configured to form a second nip portion by contacting the discharge roller on a downstream side of the first roller in a rotation direction of the discharge roller, an urging unit configured to urge the first roller and the second roller toward the discharge roller, and an adjustment unit configured to adjust a ratio of a pressure of the second nip portion to a pressure of the first nip portion in a state in which the first roller and the second roller are kept in contact with the discharge roller by the urging unit, wherein a sheet is conveyed while being simultaneously held by the first nip portion and the second nip portion.

Sheet discharge device

To provide a rotating shaft with which flexibility of forming a bend is increased, and the strength is increased while reducing the amount of material. A V-shaped rotating shaft formed by bending sheet metal. An angle formed on an inner side of a bent portion is less than 90&#xb0;.

Rotating shaft, roller, sheet conveyance device, and image forming apparatus

The sheet conveyance apparatus includes first and second rollers, the second roller coming into contact with the first roller and thereby forming a nip portion, the second rotation axis being inclined with respect to the first rotation axis, wherein the second roller includes a first outer circumferential portion having a first outside diameter, a second outer circumferential portion arranged on one side of the first outer circumferential portion in an axial direction of the second rotation axis and having a second outside diameter larger than the first outside diameter, and a third outer circumferential portion arranged on the other side of the first outer circumferential portion, and wherein an outer circumferential surface of the first roller contacts with at least the first, second and third outer circumferential portions of the second roller, to form the nip portion.

Sheet conveyance apparatus and image forming apparatus

An image processing apparatus ejects the sheet to witch image processing unit perform to an ejection tray or a staple stacker by a pair of ejection rollers and the like. A sheet path for guiding the sheet to the ejection rollers is opened and closed in conjunction with slide movement of the ejection tray when the ejection tray is attached to a main body of the apparatus, and the sheet path is opened and closed in conjunction with the slide movement of a staple stacker when the staple stacker is attached to the main body of the apparatus.

Image processing apparatus

A process cartridge detachable mountable to a main assembly of an electrophotographic image forming apparatus includes an electrophotographic photosensitive drum; a developing roller for developing an electrostatic latent image formed on the photosensitive drum with developer; a transferring roller for causing transfer of the developer image from the photosensitive drum to a recording material; a cleaner, contacted to the photosensitive drum, for removing a developer remaining on the photosensitive drum; a developer accommodating portion for accommodating developer removed from the photosensitive drum by the cleaner; and a memory including a storing portion for storing predetermined information and a communicator for effecting wireless communication of the predetermined information stored in the storing portion with a main assembly side communicator provided in the main assembly of the electrophotographic image forming apparatus. The storing portion is disposed inside the developer accommodating portion and the storing portion is disposed on the same side of the process cartridge as the photosensitive drum with respect to tangent lines passing a contact point between the photosensitive drum and the developing roller or transfer roller.

Process cartridge having storage device which communicates with image forming apparatus

A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an electrophotographic photosensitive drum; a charger, contacted to the electrophotographic photosensitive drum along a length of the electrophotographic photosensitive drum, for electrically charging the electrophotographic photosensitive drum by application of a bias voltage to the charging means; a cleaner, contacted to the electrophotographic photosensitive drum, for removing a developer remaining on the electrophotographic photosensitive drum; a holder for holding the cleaning means along the length of the electrophotographic photosensitive drum; and a memory including a storing portion for storing predetermined information and a communicator for effecting wireless communication of the predetermined information stored in the storing portion with a main assembly side communicator provided in a main assembly of the electrophotographic image forming apparatus; wherein the memory is disposed in a region blinded by the holder as seen in a direction crossing with a longitudinal direction of the electrophotographic photosensitive drum from a given contact point between the electrophotographic photosensitive drum and the charger.

Sheet discharge rotary body for use in image forming apparatus

An image forming apparatus includes a main assembly including an image forming station, a conveying unit for conveying a recording material on which the image forming station forms an image, the conveying unit including a recording material inlet, recording material feeding device and a recording material discharging outlet, and being supported on the main assembly for movement toward and away from the main assembly. The image forming station is at least partly disposed adjacent the conveying unit and is exposed when the conveying unit is moved away from the main assembly. When mounted to the main assembly, the convening unit constitutes a passage for conveying the recording material substantially in a vertical direction through the image forming station, and the conveying unit is separable, substantially along the conveying passage, from the main assembly.

Image forming apparatus with improved jam clearance operation

An image forming apparatus includes a main assembly and a detachable process cartridge mountable to the main assembly. The main assembly has a rotatable image transfer roller for transferring a toner image onto a recording sheet and the process cartridge has a rotatable photosensitive member, a device to form an image on that photosensitive member, a driving force receiving unit provided in the photosensitive member for receiving a driving force from the main assembly so as to rotate the photosensitive member and a driving force outputting unit provided in the photosensitive member for outputting the driving force back to the main assembly to rotate the image transfer roller in the main assembly.

Image forming apparatus with detachable process cartridge

This invention relates to a resupplying apparatus detachably attached to an image forming apparatus body which comprise a resupplying passage connecting a sheet material passage on a downstream side of an image forming means in the image forming apparatus body with another sheet material passage on an upstream side of the image forming means. Also, the resupplying apparatus comprises switchback conveying means placed in the resupplying passage for reversing the conveyance direction of the sheet material upon reception of the sheet material from a conveyer in the image forming apparatus body, said switchback conveying means at least partially assembled in the image forming apparatus body; and resupplying means for returning the sheet material to the upstream side of the image forming means through the resupplying passage.

Resupplying apparatus and image forming apparatus

A process cartridge is detachably mountable on an image forming apparatus and has as its components a frame, a photosensitive member inside the frame, a charging device, a developer for supplying developer to the photosensitive member and a cleaning device for removing residual matter from the photosensitive member. When the process cartridge is mounted to the main assembly a light path extending substantially horizontally is formed for permitting external light corresponding to image information to reach the photosensitive member. The light path is formed between the developer container and the residual matter container.

Image forming apparatus with detachably mounted cartridge and image

An image forming apparatus includes a main assembly including an image forming station, a conveying unit for conveying a recording material on which the image forming station forms an image, the conveying unit including a recording material inlet, recording material feeding device and a recording material discharging outlet, and being supported on the main assembly for movement toward and away from the main assembly. The image forming station is at least partly disposed adjacent the conveying unit and is exposed when the conveying unit is moved away from the main assembly. When mounted to the main assembly, the conveying unit constitutes a passage for conveying the recording material substantially in a vertical direction through the image forming station, and the conveying unit is separable, substantially along the conveying passage, from the main assembly.

A scanning optical device focuses a laser beam emitted by a laser oscillator by a first lens, scans it by a deflector to direct it onto a medium to be scanned, by a second lens, deflects a portion of the light transmitted through the second lens by a stationary mirror, directs it to a photo-sensor by a third lens and uses an output of the photo-sensor to trigger a horizontal synchronous signal. At least two of the first lens, the second lens and the third lens are integrally formed.

Scanning optical device

A laser beam printer having a deflector for deflecting a laser beam modulated in accordance with information to be recorded and a photosensitive member which is scanned by the deflected laser beam. A frame is provided to position both the deflector and the photosensitive member, the frame having a positioning portion for positioning the photosensitive member. The frame is mounted on a printer base, the frame being supported on the base at three points wherein one of the three points is located adjacent the deflector and the other two points are disposed adjacent the positioning portion of the photosensitive member.

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Tokyo, Japan

Masanobu Kanoto