Canon Kabushiki Kaisha

Yuhei Takei

Masashige Tamura

Seiichiro Adachi

Shigeo Doi

Takuya Terae

Jun Nakagaki

Kenichi Tamura

A fixing apparatus includes a fixing belt, a steering roller, a pressure rotation member, and a contact-separation mechanism. The contact-separation mechanism moves the pressure rotation member to a position where the pressure rotation member is in a contact state with the fixing belt and a position where the pressure rotation member is in a separated state from the fixing belt. Swing of the steering roller is controlled so that the fixing belt moves to a predetermined position in a fixing belt width direction. A distance between a center position of the fixing belt in tilting the steering roller for a first time after the center position is separated from a center position of a range of movement of the fixing belt and the center position of the range of movement of the fixing belt in the width direction is smaller in the separated state than in the contact state.

Fixing apparatus

The image forming member has a frame member which forms the image forming member, the frame member including: a first support member, the first support member having a first member and a second member which is attached to the first member, a part of the second member being outside of the first member in a longitudinal direction of the first support member, a second plate member being fixed to a first plate member so that a length of the first support member in a longitudinal direction becomes a predetermined length; a second support member which is fastened to the first plate member by welding; and a third support member which is fastened to the second plate member by welding. Thereby, the image forming member can form images with high accuracy.

Image forming apparatus frame

A frame for forming an image forming apparatus for forming an image on a recording material includes a first stay, including a supporting portion for supporting the frame relative to an installation surface, for forming a bottom of the frame; a second stay, including a supporting portion for supporting the frame relative to the installation surface, for forming the bottom of the frame; a post to which the first stay and the second stay are secured; and a positioning portion, provided as a part of the post, for positioning the first stay and the second stay with respect to a horizontal plane direction. The first stay and the second stay are fixed to the post by welding.

Frame for forming image forming apparatus and manufacturing method of the frame

A belt driving apparatus is configured so as to satisfy a relationship &#x3bc;(2T sin(&#x3b8;/2)+f)&#x3c;&#x3bc;(2T sin(&#x3b8;/2)+f), wherein &#x3bc;is a dynamic friction coefficient between the supporting roller and the endless belt, &#x3bc;is a dynamic friction coefficient between the steering roller and the endless belt, &#x3b8;is a winding angle of the endless belt with respect to the supporting roller, &#x3b8;is a winding angle of the endless belt with respect to the steering roller, fis the first external force applied to the supporting roller through the endless belt, fis the second external force applied to the steering roller through the endless, and T is a tension force applied to the endless belt by the tension roller.

Belt driving apparatus and image forming apparatus

Representative configurations of a cleaning apparatus, a process cartridge and an image forming apparatus according to the present invention includes: a cleaning blade which abuts on a photosensitive drum which bears a toner image, and which removes toner which remains on the photosensitive drum; compression springs which are compressed to pressurize the cleaning blade against the photosensitive drum; and spring attaching portions which regulate phases of compression springs such that positions of the compression springs in a circumferential direction are at predetermined phase positions when the compression springs are attached.

Cleaning apparatus, process cartridge, and image forming apparatus

Provided is an image forming apparatus including: an image carrying unit on which a toner image is carried; a transfer unit that transfers a toner image carried by the image carrying unit onto a sheet at a transferring position; a sheet conveyor unit that conveys the sheet having the toner image transferred thereto by the transfer unit; a suction device that sucks the sheet to the sheet conveyor unit; and a controller that stops or reduces a sucking operation of the suction device where the toner image carried by the image carrying unit passes the transferring position without being transferred onto the sheet.

Image forming apparatus with suction unit controller

An image forming apparatus includes a plurality of image bearing members, a plurality of primary transferring devices, an intermediary transfer unit, a secondary transfer portion, a detecting member, an adjusting device, an openable member, a guiding mechanism, and a retracting mechanism.

Image forming apparatus

An image forming apparatus which includes a plurality of image bearing members, a plurality of primary transferring devices, an intermediary transfer unit, a secondary transfer portion, a feeding path, a detecting member, an adjusting device, an openable member, a guiding mechanism, and a retracting mechanism.

An image forming apparatus including an image bearing member that rotates while bearing toner image, a transfer unit including, a transfer member that rotates while contacting to the image bearing member and transfers the toner image on the image bearing member to a recording material, and a toner removing member that rotates while contacting with the transfer member, and collects the toner on the transfer member, a transmission path that transmits drive power for rotating the transfer member and the toner removing member, and a separation/contact unit that rocks the transfer unit and the transmission path integrally around a rotational center of a driving power reception member which is a part of the transmission path and to which the driving power is applied, so that the transfer member is separated from and contacted with the image bearing member.

Residual toner removal apparatus and image forming apparatus

An image forming apparatus is provided with an image bearing member bearing a toner image thereon, a toner image forming device for forming the toner image on the image bearing member, a transferring member for transferring the toner image borne on the image bearing member to a recording medium being moved, a cleaning member for electrostatically removing the toner adhering to the transferring member, and an electric field forming device for forming an electric field between the transferring member and the cleaning member, wherein when the greatest length of the image formable by the toner image forming device in a direction orthogonal to the direction of movement of the recording medium is defined as L, and the length of the transferring member is defined as L, and the length of an area in which the electric field is formed is defined as L, the relation that L&#x3e;L&#x3e;Lis satisfied.

Image forming apparatus featuring a defined relationship among an image length, transforming member length, and length of an electric field area

An image forming apparatus according to the present invention includes an image bearing member, toner image forming device for forming a toner image on the image bearing member, a transferring member for bringing into and out of contact with the image bearing member by rocking operation to electrostatically transfer the toner image on the image bearing member to a transfer material, and a toner removing device for, while the transferring member rocks, electrostatically removing the toner on the transferring member by that a bias is applied.

Disclosed is an image forming apparatus that includes a plurality of developing devices capable of developing an electrostatic latent image on an image bearing member at a developing position, a developing device moving apparatus for holding the plurality of developing devices and selectively moving one of the plurality of developing devices to the developing position, a connecting portion disposed on an apparatus main body side for electrically connecting a developing device located at the developing position to an apparatus main body, and to-be-connected portions disposed to the plurality of developing devices, respectively and coming into contact with the connecting portion, wherein any one of the connecting portion and the to-be-connected portions comprises a rotary member which is rotated by being in contact with the other of them.

Image forming apparatus with electrically conduction rotary member for electrically connecting a plurality of developing devices to a main body of the apparatus

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Abiko, Japan

Yuhei Takei