Fuji Xerox Co., Ltd.

Yasutomo Ishii

Toshiaki Suzuki

Takashi Fuchiwaki

Kiyohito Horii

Mitsuo Yamamoto

Hiroaki Okuma

Ryo Fukuno

Katsuya Takenouchi

Yuki Nagamori

Shinichi Kuramoto

Nobukazu Takahashi

Fumio Furusawa

Yasuyuki Kobayashi

Ryuji Hattori

Yasutaka Naito

Shinji Okuyama

Shigehiko Haseba

Satoshi Matsuzaka

Akihisa Maruyama

Hitoshi Funato

Ryota Tomishi

Daisuke Uchimitsu

Kazunori Numao

Junichiro Sameshima

Kazuhiko Miyazato

Keitaro Sonoguchi

Minoru Ueki

Yoko Shimomura

Makoto Kanno

Kiyotoshi Kaneyama

Hideaki Ozawa

Junichi Ichikawa

Keisuke Kubo

Jin Iwasaki

Yu Tsuda

Kuniaki Tanaka

Shunichiro Shishikura

Mikio Yamaguchi

Tatsuya Soga

Daisuke Nakai

Kenjo Nagata

Yoshitaka Kuroda

Shigemi Murata

Yasuo Takayama

Ryuji Katsuno

Yuki Sekura

Ryota Kubo

Koya Tanaka

Yutaka Kanai

Masanori Kobayashi

Shintaro Hattori

Yuji Sakoda

Yuji Terai

Akio Arai

Yoshinobu Kariya

Yoichi Kaname

A powder material storage container includes: a cylindrical body member that extends in one direction and includes a storage chamber for storing powder material; a transport member that transports the powder material to an end of the storage chamber; a cylindrical end member that is attached to the body member, extends in the one direction and includes a passage chamber through which the powder material is passed, and a discharge outlet through which the powder material is discharged; a pillar member that is disposed in the passage chamber, extending in the one direction, and rotates in a circumferential direction of the passage chamber along the wall surface, and transports the powder material adhering to the wall surface to the discharge outlet; and a beam member that is laid across the discharge outlet and extends from an upstream side to a downstream side of a rotation direction of the pillar member.

Powder material storage container and image forming apparatus

A developing device includes a container that contains a developer including a carrier and a toner; a transport member that is rotatably disposed in the container and that agitates and transports the developer in a rotation-axis direction thereof; a discharge outlet that has an opening in a side wall of the container facing in a direction perpendicular to the rotation-axis direction, the discharge outlet allowing the developer to be discharged to an outside of the container when a height of a surface of the developer becomes greater than a height of a lower surface of the discharge outlet; and a magnetic member that is disposed at a position that is above the lower surface of the discharge outlet and that overlaps the lower surface in an up-down direction, the magnetic member attracting a part of the developer that is lifted up by the transport member.

Developing device and image forming apparatus

Provided is an image forming apparatus including an image holding member that has an outer circumferential surface in which a radius length from a center in the image holding member varies to be the longest N times and the shortest N times during one rotation of the image holding member wherein N is an integer of 2 or more, and that holds a latent image while being rotated, a developing member that develops the latent image of the image holding member with a developer, a rotation unit that rotates the developing member by a number of an integer multiple of the N during the one rotation of the image holding member, and an output unit that outputs a developer image of the image holding member to a recording medium.

Image forming apparatus capable of reducing image banding

An image forming apparatus includes an image holding body, a developing device, a transfer device, a collection device, a container, and a transport member. The image holding body includes a surface on which a latent image is formed. The developing device develops the latent image into a visual image with developer. The transfer device transfers the visual image onto a transfer medium. The collection device collects the developer remaining on the surface of the image holding body after the visual image has been transferred. The container contains new developer supplied to the developing device. The image forming apparatus has a channel that has a first sub-channel and a second sub-channel. The developer flows into the first sub-channel from one of the collection device and the container and the second sub-channel from the other of the collection device and the container.

Image forming apparatus for transporting collected toner and new toner with reduced clogging

Provided is a developing device including a storage container that stores a developer, a rotating body that supplies the developer to an image holding member in a supply region by being rotated with holding the developer, an inflow portion that is provided with an inflow port placed on a downstream side of the supply region in a rotation direction of the rotating body, and flows air into the storage container, and an outflow portion that is provided with an outflow port and emits air in the storage container from the outflow port, wherein the outflow port and the inflow port are placed to be adjacent to each other.

Developing device

A developing device includes a developer carrier that has a cylindrical shape and that rotates while carrying developer to supply the developer to an image carrier on which an electrostatic latent image is formed, a container that contains the developer carrier, and a discharge-path forming member that is provided along an outer peripheral surface of the developer carrier, that covers a top portion of a path along which the outer peripheral surface moves, the top portion being located at an uppermost position of the path, and that forms a discharge path, through which air is discharged from inside of the container to outside of the container, between the discharge-path forming member and an inner wall surface of the container, the discharge path having an outlet located closer to the developer carrier than the top portion.

A developing device includes a developer carrier that has a cylindrical shape and that rotates while holding developer to supply the developer to an image carrier on which an electrostatic latent image is formed; a container that contains the developer carrier; a discharge-path forming member that forms a discharge path along which air is discharged out of the container from inside the container; and a magnetic member that generates a magnetic field that acts on the developer in the discharge path and causes the developer to stay in the discharge path.

An image forming apparatus includes an image carrying member, a developer carrying member facing the image carrying member in a horizontal direction and configured to carry a developer containing magnetic particles and to rotate in a circumferential direction thereof, a transport pole provided inside the developer carrying member and above a center of rotation of the developer carrying member and allowing the developer carrying member to transport the developer, and a developer regulating member facing the developer carrying member at a position between the transport pole and the image carrying member in a direction of rotation of the developer carrying member and configured to regulate a thickness of the developer on the developer carrying member. The developer accumulates at a position where an amount of bending in the developer carrying member in a vertical direction becomes larger than or equal to that in the horizontal direction.

Image forming apparatus

A charge roll includes a roll member that contacts an image carrier and rotates, the roll member including a conductive material that charges the surface of the image carrier, and the roll member having particles on the outer circumferential surface of the roll member to have a surface roughness within a predetermined range.

Charge roll, process cartridge, image forming apparatus, charging method, and cleaning method of charge roll

An electrostatic latent image holder unit includes: first and second electrostatic latent image holders that have first and second functional layers, respectively, the first functional layer being different from the second functional layer in component ratio, and holds an electrostatic latent image on a surface thereof; a contact type charging unit that is in contact with the first electrostatic latent image holder to charge a surface of the first electrostatic latent image holders at a predetermined electric potential level; a non-contact type charging unit that are spaced from the second electrostatic latent image holder, and charge a surface of the second electrostatic latent image holder at a predetermined electric potential level; an exposure unit that exposes the first and second electrostatic latent image holders to form an electrostatic latent image; and a development unit that develops the first and second electrostatic latent image with toner to form a toner image.

Electrostatic latent image holder unit and image forming apparatus using the same

An image forming apparatus includes an image bearing member, a charging roll that charges the image bearing member by rotating in contact with the image bearing member, and a cleaning member that removes materials adhered to the surface of the charging roll by contacting the surface of the charging roll. The cleaning member includes a foam body having an average cell diameter of 0.18 mm to 1.0 mm, and a ten point height of irregularities (Rz: JIS B0601-1982) of the charging roll is 1 &#x3bc;m to 17 &#x3bc;m.

Image forming apparatus and cleaning method therefor

An image forming apparatus includes a member to be cleaned, and a cleaning member, formed by foam material having plural foam cells, that cleans the member to be cleaned by contacting the member to be cleaned and rubbing against the member to be cleaned. In any one of the plural foam cells in a surface of the cleaning member, a maximum length A in a rubbing direction and a maximum length B in a direction orthogonal to the rubbing direction satisfy the relationship of A&#x3c;B.

Cleaning device and image forming apparatus

The present invention is a charging device that electrically charges an object that is charged while being moved in a predetermined direction and an image forming device having such a charging device. The charging device has: a charging member that electrically charges the charged object; a power source that supplies electric power to the charging member in order to electrically charge the charged object; a contact member arranged downstream relative to the charging member as viewed in the moving direction of the charged object and adapted to contact the charged object directly or by way of a predetermined intermediary medium; an ammeter that gauges an electric current caused to flow through the contact member due to an electric charge on the charged object electrically charged by the charging member; and a power source control section that controls the power source based on the electric current gauged by the ammeter.

Charging device and image forming apparatus

In order to solve the problem, there is provided a charging device having: a roll-like charging member disposed in contact with a surface of a member to be charged and for charging the surface of the member to be charged; wherein: the charging member includes a conductive substrate, and at least an elastic layer and a surface layer applied sequentially onto a surface of the conductive substrate; and opposite end portions of the surface layer axially project beyond opposite end portions of the elastic layer respectively, while the opposite end portions of the surface layer are made to cover the elastic layer and made open.

Charging device and image forming apparatus using the same

An image formation apparatus for document production of reproduction which includes a plurality of paper feed trays T,-T,placed in overlapped relation at multiple stages from top to bottom wherein the length of the top-stage paper feed tray T,in the paper feed direction is formed shorter than the length of each of the paper feed trays T,-T,at lower stages in the paper feed direction, an image support,an intermediate transfer body B, and a secondary transfer device,placed in a tray upward paper feed side space Sa above the paper feed tray T,a fuser T placed in a top-stage tray side space Sb,on the side of the top-stage paper feed tray T,and an upward side space Sb,above the space Sb,and a developing unit D placed in the upward side space Sb

Compact image formation system having a plurality of paper trays

Growing community of inventors

Kanagawa, Japan

Yasutomo Ishii