Canon Kabushiki Kaisha

Sharp Nec Display Solutions, Ltd.

Satoshi Kurihara

Teruhiko Sasaki

Minoru Sato

Tsutomu Nishiuwatoko

Toru Koizumi

Shinichi Sasaki

Yoshiyuki Batori

Kazuyoshi Odagawa

Masanari Morioka

Atsushi Numagami

Toshiyuki Karakama

Isao Ikemoto

Hideki Hayashi

Shinya Noda

Yoshiya Nomura

Naoki Matsumaru

Kazumi Sekine

Katsunori Yokoyama

Hiroo Kobayashi

Akira Suzuki

Yasuo Fujiwara

Takao Nakagawa

Kunimasa Kasai

A light guide includes: a light guide main body that guides light input from an incident surface to an exit surface; and an attachment member that is connected to the light guide main body and includes an attachment portion that is to be fixed to another member, and the area of a connection surface between the attachment member and the light guide main body is smaller than the cross-sectional area of the attachment portion.

Light guide, light guide unit, manufacturing method of light guide unit, and electronic device

A toner seal member which is maintainable in contact with a rotating member to seal a toner. The toner seal member has a non-woven fabric sheet on a support layer formed of an elastic member, and the non-woven fabric sheet has a fiber diameter of from 2 &#x3bc;m to 10 &#x3bc;m. This toner seal member can prevent fine toner from leaking via a photosensitive drum surface and can also prevent coarse powder toner from adhering to the photosensitive drum surface, and has sufficient toner sealing properties without damaging the functions of the photosensitive drum and image-forming performance.

Toner seal member, and process cartridge

A process cartridge is detachably mountable to a main assembly of an electrophotographic. The cartridge includes a photosensitive drum; a process device; and a first contact portion provided on a bottom surface of a cartridge frame provided at one longitudinal. The first contact portion is guided by a first assembly side guide when the cartridge is mounted. The cartridge also includes a cartridge coupling disposed above the first portion, the coupling being engageable with an assembly side coupling to receive a rotational force from the assembly; and a second contact portion disposed behind the first portion with respect to the mounting direction. The second portion limits rotation of the cartridge. The cartridge also includes; a positioning portion projected outwardly and provided at the other longitudinal end of the drum, the positioning portion being guided by a second assembly side guide, and being positioned to a second assembly side receiving portion.

PROCESS CARTRIDGE, MOUNTABLE TO AN IMAGE FORMING APPARATUS, HAVING FIRST CONTACT PORTION TO BE GUIDED BY A GUIDE WHEN MOUNTED AND SECOND CONTACT PORTION TO LIMIT CARTRIDGE ROTATION OR MOVEMENT WHEN MOUNTED, AND IMAGE FORMING APPARATUS MOUNTING SUCH A PROCESS CARTRIDGE

Image forming apparatus

A cylindrical electrophotographic photosensitive drum of an electrophotographic image forming apparatus includes plural holes penetrating a metallic hollow cylindrical base body in a radial direction near its end portion, where the end portion of the base body and the holes are filled with resin, and a flange is formed by outset molding so as to integrate the base body and the flange.

Electrophotographic photosensitive drum, process cartridge, and electrophotographic image forming apparatus

A toner-guiding sheet for guiding toner removed from an image carrying member. The sheet includes a free end portion for contacting a surface of the image carrying member, and a fixed portion, fixable on a fixing member, for fixing the toner-guiding sheet in a state in which the free end portion contacts the surface of the image carrying member. The toner-guiding sheet includes a film having a creep-deformation resisting property such that, when the film, fixed on the fixing member so that a distance &bgr; from a central portion in a longitudinal direction of the fixed portion of the sheet to a central portion in a longitudinal direction of the free end portion of the sheet is substantially 3.86 mm, is brought in contact with a surface of a contact member under conditions such that a distance &agr; from the central portion in the longitudinal direction of the fixed portion of the sheet to a central portion in the longitudinal direction of a contact portion of the free end portion on the surface of the contact member is substantially 1.86 mm, an amount of penetration &dgr; of the central portion in the longitudinal direction of the contact portion of the sheet with respect to the contact member is substantially 2.0 mm, and an amount of charge &xgr; of the central portion in the longitudinal direction of the contact portion of the sheet with respect to the contact member is substantially 0.74 mm, a change in the amount of penetration &dgr; when leaving the toner-guiding sheet in an environment of a temperature of substantially 45&deg; C./a humidity of substantially 60% RH for substantially 30 days is equal to or less than substantially 0.43 mm.

Toner-guiding sheet, cleaning apparatus, process cartridge, and image forming apparatus

A developing apparatus for developing a latent image formed on an electrophotographic photosensitive member includes a development member for conveying developer to the electrophotographic photosensitive member to develop the latent image formed on the electrophotographic photosensitive member; a developer storing portion for storing the developer used by the development member to develop the latent image; a developer supplying opening for supplying the developer stored in the developer storing portion, to the development member; and a developer remainder amount reporting member disposed within the developer storing portion, away from the internal surface of the developer storing portion, for reporting the developer remainder amount within the developing apparatus on the basis of the electrostatic capacity between the developer remainder amount reporting member and the development member.

Developing apparatus and process cartridge

A cleaning apparatus includes a cleaning blade urged against an electrophotographic photosensitive member, and a cleaning frame to which the electrophotographic photosensitive member and a cleaning blade holding member and a dip sheet are attached, and wherein an area having a small gap is formed between an inner wall of the cleaning frame and the other end of the cleaning blade holding member opposite to one end to which the cleaning blade is attached.

Cleaning apparatus and process cartridge having such cleaning apparatus

The present invention facilitates the work for filling developer into a developer containing portion. An end member, used for a process cartridge, has a detachable handle member, which connects with one end in a longitudinal direction of a sealing member, for being held when the sealing member is unsealed, and is mounted on one end in a longitudinal direction of the developer containing portion to cover a developer filling port.

End member and process cartridge

A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus including an electrophotographic photosensitive member; a developing member for developing a latent image formed on the photosensitive member; a toner accommodating portion for accommodating toner to be used for development of the latent image by the developing member; a toner stirring member for stirring the toner accommodated in the toner accommodating portion; a driving force transmission member for transmitting rotational driving force to the toner stirring member to rotate the stirring member; wherein the driving force transmission member is penetrated through an opening provided in the toner accommodating portion; a locking member, provided inside of the toner accommodating portion to prevent the driving force transmission member from dropping out of the toner accommodating portion through the opening; a driving member for driving the driving force transmission member, wherein the driving member is provided outside of the toner accommodating portion; wherein the driving force is transmitted from the driving member to the driving force transmission member such that driving force transmission member receives thrust force toward the toner accommodating portion through a projection having an inclined surface extending in a direction crossing with a rotational direction of the driving member and an engaging portion engaging with the inclined surface of the projection.

Process cartridge and electrophotographic image forming apparatus

A process cartridge remanufacturing method for a process cartridge detachably mountable to a main assembly of an image forming apparatus includes the steps of providing a new photosensitive drum; providing a new toner-development frame including a new toner frame having a toner containing portion for containing toner, a new development frame having a roller mounting portion for mounting a developing roller for supplying toner to the photosensitive drum, wherein the toner frame and the development frame are welded with a new removable toner seal therebetween for preventing the toner in the toner containing portion from leaking out; preparing a drum frame to be reused having a drum mounting portion for mounting the photosensitive drum; supplying toner into the toner containing portion; mounting the developing roller to the new development frame; mounting the photosensitive drum to the drum frame to be reused; and rotatably engaging the new toner-development frame and the drum frame to be reused.

Process cartridge remanufacturing method and process cartridge

A charging apparatus includes a rotatable charging member, contactable to a member to be charged, for charging the member to be charged, the rotatable charging member is provided with a rotation shaft; an electroconductive elastic member for urging the rotatable charging member to the member to be charged, wherein the rotatable charging member is capable of being supplied with a voltage through the elastic member; wherein a part of the elastic member and a peripheral surface of the rotation shaft are contacted to electrically connect the elastic member with the rotation shaft.

Charging device and process cartridge

A method for reconditioning a development roller includes a roller portion for conveying developer, and a plastic flange portion connected to one end of the roller portion to transmit a driving force; wherein after the flange portion and roller portion are separated, a part of the roller portion, which is deformed is removed, and a flange portion, which is longer in the axial direction of the roller portion than the separated flange portion, is joined with said separated and shortened roller portion.

Reconditioning method for developing roller

A frame for a developing device for a process cartridge detachably mountable to a main assembly of an image forming apparatus, includes a developing frame having a mounting portion for mounting a developing roller for developing a latent image formed on an electrophotographic photosensitive member, the developing frame having a projection on a side opposed from a side provided with the mounting portion; a toner frame having a toner container portion for containing a toner usable for developing operation of the developing roller, the toner frame having an opening for supplying toner to the developing roller and a recess adjacent a longitudinal end of the opening; wherein the projection and recess are engageable with each other to couple the developing frame and the toner frame.

Growing community of inventors

Toride, Japan

Satoshi Kurihara