Canon Kabushiki Kaisha

Cannon Kabushiki Kaisha

Kazuo Shishido

Shinichi Sasaki

Yoshiya Nomura

Toshiyuki Karakama

Isao Ikemoto

Koji Miura

Shigeo Miyabe

Makoto Tanaka

Tadayuki Tsuda

Minoru Sato

Hironobu Isobe

Hiroo Kobayashi

Kazushi Watanabe

Atsushi Numagami

Akira Higeta

Masahiko Yashiro

Hiroyuki Shirai

Kazuhiko Ishiwata

Kanji Yano

Shinya Noda

Yoshikazu Sasago

Kazumi Sekine

Kazunori Kobayashi

Hiroaki Miyake

Yasumi Yoshida

Hiroyoshi Maruyama

Yasushi Sato

Kenji Matsuda

Takeo Shoji

Kouji Miura

Shinichiro Wakahara

Noriaki Koyanagi

Takashi Hibi

Tamotsu Okada

The invention aims to prevent an image deterioration resulting from a fixing belt rising in temperature too much, and prevent heat of the fixing belt from being transmitted to peripheral members around a fixing apparatus such as a photosensitive drum so as not to adversely effect the peripheral members. A fixing apparatushas a fixing rollerand a fixing beltthat heat-fix an image on to a recording material P by a fixing nip W, partition wallstothat surround the fixing beltto thereby suppress the air naturally entering into around the fixing belt, and a cooling unit that cools the fixing beltin a closed spaceformed by the partition wallsto. The cooling unit has a supply ductthrough which a supply fansupplies air to the closed spacefrom below, a cooling fanthat blows the air supplied from the supply ducttoward the fixing belt, and a discharge ductthrough which a discharge fandischarges the air from an upper portion of the closed space

Image heating apparatus including an endless belt and belt cooling mechanism

An image reading apparatus for reading a document has an image sensor unit, which is moved along a platen glass in a sub-scanning direction, mounting an LED, a light guide and a sensor. A white reference panel for use of shading correction is provided on the platen glass on the side thereof opposite the image sensor unit. Light shield plates are provided on the platen glass on the side facing the image sensor unit along both sides of the white reference panel.

Structure for preventing extraneous light from entering image reading apparatus

A both-face automatic original feeding apparatus wherein a plurality of originals having images on their first and second surfaces are successively supplied from an original stacking portion to a predetermined position for reading an original, and each original is reversely rotated through a switch-back path after the first surface of the original passes through the predetermined position, thereby supplying the original to the predetermined position again to direct the second surface of the original to the predetermined position. In such a feeding apparatus, there is provided an introduction path for directing the original supplied from the original stacking portion to the predetermined position; a first discharge path for directing the original to the switch-back path after the original passes through the predetermined position; a surface reverse path for directing the original from the switch-back path to the predetermined position after reversing a first surface and a rear surface of the original; and a controller for controlling the apparatus in such a manner that a preceding original is switched back to convey it in the surface reverse path while a succeeding original is being passed through the predetermined position, and, when a trailing end of the succeeding original leaves the predetermined position, a tip end of the preceding original reaches the predetermined position.

Both-face automatic original feeding apparatus

An image bearing member, process device acting on the image bearing member, a first frame, a second frame lockable and separable with respect to the first frame, a locking body and a locking member lockable to the locking body, provided to separably interlock the first and second frames, and a recessed portion and a projection fittable into the recessed portion which are provided to separably interlock the first and second frames. With above construction it is possible to provide a process cartridge, an image forming system, and a method for assembling a cleaning device, which can be easily assembled and can sufficiently cope a large when the number of re-cycles.

Process cartridge mountable in an image forming system and a method for

A document reading device for applying light to a document placed on platen glass so as to read an image formed on the document. The device is provided with a light-screen. The width of the light-screen can be changed according to the document size in such a way that it is also possible to change the amount of light which can pass through the light-screen from a light source to be applied to the platen glass. With this arrangement, a local temperature increase in the platen glass can be inhibited during sequential document-reading.

Document reading device with light-shielding member that prevents a

The present invention is characterized by that a first frame for containing developer used with a developing operation, a second frame for supporting a developing means for developing a latent image formed on an image bearing member, and a third frame for supporting the image bearing member are made of the same material.

Process cartridge and image forming apparatus using such a process

A sheet feeding device can perform registration of a sheet with high precision even if the sheet is fed at high speed. The device includes a pair of active registration rollers, disposed at a side upstream from a reading unit in the sheet feeding direction, for correcting skew of the sheet, skew-amount detection sensors, disposed at a side downstream from the pair of active registration rollers in the sheet feeding direction, respective pairs of feeding rollers, disposed at a side upstream from the pairs of active registration rollers in the sheet feeding direction, and sheet detection sensors, disposed at a side upstream from the pairs of feeding rollers in the sheet feeding direction. Each of the pairs of feeding rollers includes a roller having a semispherical cross section at the driving side. When the leading edge of the sheet has been detected by the sheet detection sensors, the semispherical rollers are stopped in a state of not holding the sheet when the sheet is fed to the pair of active registration rollers by rotating the semispherical rollers by a predetermined number of revolutions at the same phase.

Sheet feeding device with control of skew-correction

A process cartridge includes a first frame in which a toner containing unit for containing toner used for a developing operation and a charger unit are mounted, and a second frame which can be engaged by and disengaged from the first frame, and in which an image bearing member, a developing unit and cleaning unit are mounted. With this arrangement, the assembling ability and disassembling ability are improved remarkably, and the process cartridge is suitable for the re-cycling to contribute to the protection of the earth-environment.

Process cartridge and image forming system on which process cartridge is

A cylindrical member such as a developing roller or photosensitive drum has a sleeve, a flange at the end portion of the sleeve, and a space-controlling member provided at the end portion of the sleeve. The flange is press-fitted into the end portion of the sleeve to be bonded to the sleeve. A space-controlling portion of the space-controlling member is located further from the end of the sleeve than the press-fitted portion of the flange.

Electrophotographic apparatus employing cylindrical member having space

The present invention provides a process cartridge mountable to an image forming apparatus. The cartridge includes an image bearing member, a processor for acting on the image bearing member, a driving force receiver provided at one end of the image bearing member, a protection member shiftable between a protection position to protect the image bearing member and a retract position, a first projection provided on the side of a toner containing portion, a guide member protruded in the direction perpendicular to the moving direction of the image bearing member, a second projection protruded in the moving direction of the image bearing member, and a third projection protruded from the protection member.

Process cartridge and image forming apparatus

An image forming apparatus is provided with a cylinder for carrying developing agent, and with a flange fitted into an end portion of the cylinder for supporting the cylinder. A fitting portion of the flange has a diameter larger than an inner diameter of the cylinder. The flange is mounted to the cylinder by press-fitting and has a guide smaller than the inner diameter of the cylinder at an end of the fitting portion for guiding the fitting. A spacer is located at a more central side of the cylinder than the fitting portion of the flange press-fitted into the cylinder.

Image forming apparatus and detachable process cartridge having

Process cartridge, method for assembling process cartridge and image

A process cartridge includes a rotatable rotary member having a plurality of bearing attachment portions to which bearings are attachable. The plurality of bearing attachment portions are provided on the rotary member with different diameters. A method of reusing a rotation member that is supported at one of a plurality of coaxial rotation surfaces having different diameters includes detaching one of a plurality of bearing members that supports the rotation member at the one of the plurality of coaxial rotation surfaces. Another of the plurality of bearing members is then attached at a corresponding other of the plurality of coaxial rotation surfaces that has a different diameter than the one of the plurality of coaxial rotation surfaces.

Process cartridge with rotary member having bearing attachment portions

In order to prevent the eccentricity of a rotary shaft for rotatably supporting an image bearing member used with an image forming apparatus when the image bearing member is rotated, a projection is provided on an outer peripheral surface of the rotary shaft fitted into a fitting hole formed in a casing for securing the rotary shaft.

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Yokohama, Japan

Kazuo Shishido