Fuji Xerox Co., Ltd.

Naoto Yoshino

Yukio Hayashi

Takashi Kawabata

Shuji Iseki

Tatsuya Soga

Masaaki Takahashi

Norio Hokari

Nobuyoshi Komatsu

Keiji Yamamoto

Naoto Nishi

Masao Ohkubo

Yoko Miyamoto

Masaaki Tokunaga

Koichi Sato

Takashi Abe

Takeshi Okoshi

Fumio Furusawa

Masakazu Shirai

Osamu Handa

Hiroyuki Koide

Makoto Katayama

Hiroyasu Ishizuka

Minoru Niwa

An image forming apparatus includes: an image carrier; an intermediate transfer unit including an intermediate transfer body onto which an image on the image carrier is transferred, and plural rotation members around which the intermediate transfer body is wound, each rotation member rotating around a rotation axis, the intermediate transfer unit detachably attached, in the rotation axis direction, to an apparatus main body; a secondary transfer unit that makes contact with and separates from the intermediate transfer body, the secondary transfer unit provided at an opposite side of the rotation members across the intermediate transfer body; a positioning unit that, when the intermediate transfer unit is attached to the apparatus main body, positions the intermediate transfer unit in the secondary transfer unit side at least at two points differently located in the rotation axis direction; and a securing unit that secures the intermediate transfer unit to the apparatus main body.

Image forming apparatus

A feeding apparatus includes: an insulative feeding apparatus main body; plural first feeder lines; and a second feeder line, the feeding apparatus main body having: a first support member that supports the plural first feeder lines; and a second support member that supports the second feeder line, the first support member having: a wall surface part having a wall surface; and at least one projection projected from the wall surface in a direction crossing the wall surface, the plural first feeder lines being provided in space formed between the first support member and the second support member, and mutually partitioned from each other with the at least one projection, and the second feeder line being provided on a side of a surface of the second support member opposite to a surface on a side opposite to the plural first feeder lines.

Feeding apparatus and image forming apparatus

An image forming apparatus includes: an image holding body that is rotatable, and holds a first toner image and a second toner image; an image forming unit that forms the first toner image and the second toner image on the image holding body; a transfer unit that transfers the first toner image onto a transfer medium; a cleaning unit that has a cleaning member for freely coming into contact with and separating from the image holding body, and that brings the cleaning member into contact with the image holding body so as to clean a residual toner remaining on a surface of the image holding body; and a cleaning control unit that controls forming the second toner image for cleaning the cleaning member, opposing between the cleaning member and the second toner image, and cleaning of the second toner image by the cleaning member that is in a contact state with the image holding body.

Image forming apparatus including a separable cleaning member and image forming method including controlling a seperable cleaning member

An image forming apparatus has a case, an image carrier, an endless belt and a contact member, provided in the case. The image carrier supports an image. The endless belt contacts the image carrier and it is detachably attached to the image carrier. The contact member contacts the endless belt and moves with the endless belt when the endless belt is detached from the image carrier. Moreover, the contact member is pulled out from the case by separating from the endless belt, where the endless belt contacts the image carrier and the endless belt removes it from the image carrier.

Image forming apparatus with simplified removal of components

An intermediate transfer type image forming apparatus is provided, in which a secondary transfer unit includes a secondary transfer member having a contact transfer member disposed in contact with at least the surface of an intermediate transfer medium, a bias applying unit for applying a transfer bias to transfer a toner image on the intermediate transfer medium through the secondary transfer member to a transfer medium and an inverse transfer bias having the opposite polarity to the transfer bias, and a bias switching unit for switching the applied bias of the bias applying unit so that the transfer bias is applied to an image transfer area on the intermediate transfer medium and the inverse transfer bias is applied to an image non-transfer area on the intermediate transfer medium. The apparatus is also equipped with a disturbing member for disturbing (scraping out, sweeping off or the like) toner adhering to the contact transfer member.

Image forming apparatus using intermediate transfer medium

A tandem type image forming apparatus having plural image forming bodies and an intermediate transfer belt is provided, in which the intermediate transfer belt can be spaced from the image carrying bodies without causing any damage on the intermediate transfer belt. A retracting unit is provided which retracts a belt module along with a secondary transfer module such that a belt-shaped intermediate transfer belt is spaced from all of image carrying bodies.

Tandem type image forming apparatus

An apparatus and techniques for reducing the electrostatic sticking of a transfer member to the image carrying body of an image forming apparatus. The visible image on the image carrying body is formed by charged participles. A collective transfer unit collectively transfers the visible image from the image carrying body to a transfer member. A transfer member judging unit judges whether a transfer member exists downstream of and in the vicinity of a transfer position of the collective transfer unit. A pre-stop processing unit for preventing, if the transfer member presence judging unit judges that a transfer monitor exists when the stopping unit stops the device, the transfer member from electrostatically sticking to the image carrying body.

Image sticking reducing method and apparatus

There is provided an image forming apparatus capable of finely cleaning a transfer roll at all times by regulating the relation between a mechanical adhesion force of toner to the surface of the transfer roll and a mechanical adhesion force of toner to the surface of an image carrier with which the transfer roll comes in press contact. At the time of cleaning the transfer roll, both the electrostatic adhesion force and the mechanical adhesion force of charged colorant to the surface of the belt-like image carrier are set larger than the electrostatic adhesion force and the mechanical adhesion force of charged colorant to the surface of the transfer roll.

Image forming apparatus with cleaning bias feature

The image forming apparatus is capable of preventing contamination of the rear surface of paper while minimizing the deterioration of the surface of the transfer roll. The image forming apparatus has an intermediate transfer belt for carrying a toner image visualized by a toner, a transfer roll pressed against the intermediate transfer belt, and a cleaning brush that is rotatable in contact with the transfer roll. This transfer roll acts to transfer the toner image carried on the belt to paper. The cleaning brush makes contact with the transfer roll to stir the toner adhering to the transfer roll.

Image forming apparatus having a toner diffuser

In an image forming apparatus adapted to transfer a toner image formed on a photosensitive drum to an intermediate transfer belt, and thereafter to a sheet, the position of one end portion of a backup roll around which the intermediate transfer belt is passed is set regulatable, this end portion being fixed after the position thereof has been regulated. The position of one end portion of a driving roll, cleaning blades or photosensitive drum may be set regulatable. This arrangement enables the skew of an image formed on a sheet to be reduced.

Image forming apparatus capable of reducing the skew of an image formed

There is described an image forming apparatus, wherein a visible image retained on an intermediate transfer belt is collectively transferred to recording material by means of a collective transfer device including a transfer roller and a back-up roller. The recording material that has passed through a transfer nipping region is guided by means of a recording material guide member. In such an image forming apparatus, the intermediate transfer belt is set at an angle of 50.degree. or less relative to the reference line passing through the exit of the transfer nipping region between the transfer roller and the back-up roller among normals orthogonal to a line passing through the center shafts of the transfer roller and the back-up roller, in the area downstream from the transfer nipping region, and the recording material guide member is provided downward at an angle of 5.degree. to 20.degree. relative to the reference line L.

When an operator manually rotates flanges for holding roll paper, flange placement rollers rotate accordingly. Paper is supplied from the roll paper, and rotational force of one of the flange placement rollers is transmitted to a drive roller by a gear mechanism. Once the tip portion of the paper is held between the drive roller and an idler roller, the paper is semi-automatically fed to a set position by rotation of the drive roller. A torque limiter is provided in the gear mechanism to prevent an undesirably large load from being exerted on the paper.

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Ebina, Japan

Naoto Yoshino