Fuji Xerox Co., Ltd.

Fujifilm Business Innovation Corp.

Atsushi Funada

Ryuji Hattori

Mitsutoshi Hongo

Makoto Kanno

Masanori Kato

Katsumi Yamada

Hirokazu Murase

Yoshihisa Nakao

Shota Igawa

Keisuke Kubo

Kiyohito Horii

Hideki Kuge

Hiroaki Okuma

Junichi Hama

Daisuke Uchimitsu

Yoshitaka Nakajima

Seigo Shinozaki

Tatsuya Tamai

Sadayuki Tsujino

Mizue Sekine

Koichi Sato

Takayuki Yamada

Makoto Hirota

Yoshinori Tanaka

Nobumasa Furuya

Yoshiyuki Takashima

Shinichiro Fujimori

Daisuke Nakai

Hibiki Sasaki

Taiyou Uehara

Keisuke Uchiyama

Motoki Matsushima

A developing device includes: a first transport member and a second transport member that are disposed in a first transport path and a second transport path provided at an upper side and a lower side in a gravitational direction and that transport a developer. The developing device also includes an ejecting path that is provided in the first transport path disposed at the upper side in the gravitational direction and that ejects an excess developer. The developing device includes a reverse helical section that is disposed in front of a support that supports the second transport member. The reverse helical section helically extends in a reverse direction relative to a helical section provided for circulating the developer, the developer being transported to the ejecting path by the reverse helical section.

Developing device and image forming apparatus having a reverse helical section

A developing device includes: a case in which a hollow transporting path is formed; a transporting member configured to transport a developer in the transporting path; a support portion fixed to an end portion of the case by a fastening member to support the transporting member at an end portion of the transporting path; and a cooling unit fixed by being sandwiched between the support portion and the case.

Developing device with transporting member and cooling unit fixed to a case

A developing device includes a first transport member and a second transport member that are respectively disposed in a first transport path and a second transport path arranged in a vertical direction and that transport developer so as to circulate the developer between the first transport path and the second transport path. The developing device includes a developing device body in which the first transport path and the second transport path are formed. The developing device also includes a developer discharging structure that discharges excess developer discharged from the first transport path to outside through the second transport path or through a space between an end portion of the second transport path and the developing device body.

Developing device and image forming apparatus with a developer discharging structure

Provided is a developing device having a first transport member and a second transport member that are disposed in a first transport path and a second transport path provided at an upper side and a lower side in a gravitational direction. The transport members transport a developer so as to cause the developer to circulate between the first transport path and the second transport path. A partition wall that separates the first transport path and the second transport path from each other and has an opening including an open-close member that opens and closes the opening.

Developing device and image forming apparatus having an opening and closing member in a partition between conveying members

A developing device includes a first transport member and a second transport member that are respectively disposed in a first transport path and a second transport path arranged in a vertical direction and that transport developer so as to circulate the developer between the first transport path and the second transport path; a developing member that is disposed to face the first transport path and that receives the developer from the first transport path; and a driving device that operates such that a relative speed ratio between a rotational speed of the developing member and a rotational speed of the second transport member is changeable.

Developing device and image forming apparatus with separately driven elements

A developing device includes a first transport member and a second transport member that are respectively disposed in a first transport path and a second transport path arranged in a vertical direction and that transport developer so as to circulate the developer between the first transport path and the second transport path; a developing member that is disposed to face the first transport path and that receives the developer from the first transport path; and a third transport member that is disposed in a third transport path through which the developer that has not been used by the developing member is collected and transported to the second transport path. A central shaft of the second transport member is disposed farther in a vertically upward direction than is a central shaft of the third transport member.

Developing device having a partition member and image forming apparatus

A developer supply device includes a container body that receives and contains a developer with which a toner cartridge is filled and that has a supply port used for supplying the developer, which is contained in the container body, to a developing device, a sensing member that detects the developer contained in the container body, a first transport member that is rotatably disposed in the container body and that transports the developer at a first transport speed by rotating, and a second transport member that is rotatably disposed in the container body in such a manner as to face the sensing member and that transports the developer at a second transport speed that is higher than the first transport speed by rotating.

Image forming apparatus and developer supply device with first and second transport members configured to transport developer at different speeds

A powder container includes a storing chamber that stores powder, a discharge path extending through a wall of the storing chamber and from which the powder is discharged, an inner wall that forms an inner surface of the wall and has an opening communicating with the discharge path, an outer wall that forms an outer surface of the wall and has an opening communicating with the discharge path, and an opening-and-closing member provided between the inner wall and the outer wall and that opens and closes the discharge path while moving along the inner wall and the outer wall.

Powder container, developing unit, and image forming apparatus

A developing device includes a rotary member delivering a developer to a latent image on an image carrier while rotating, a supply member disposed in a supply path and including a supply shaft and a helical or substantially helical supply blade, the supply member supplying the developer to the rotary member while rotating, a stirring member disposed in a stirring path, which extends alongside the supply path, and including a stirring shaft and a helical or substantially helical stirring blade, the stirring member stirring and circulating the developer between the supply and stirring paths while rotating, and an ejection path connected to an upstream portion of the supply path in a transport direction of the developer to eject the developer to the outside. The stirring blade's outer diameter is 1.1 or about 1.1 times or more and 1.5 or about 1.5 times or less the supply blade's outer diameter.

Developing device and image forming apparatus

A container for powder detachably mountable to an image forming apparatus body includes a discharge channel and a wall member. The discharge channel has an upper end. Powder is discharged through the discharge channel. The wall member is disposed such that a gap is formed between the wall member and the upper end of the discharge channel. A transport part that transports the powder toward the discharge channel is provided in the container.

Image forming apparatus and container having wall member to cover discharge channel

An image forming apparatus is provided with an image holder that holds an electrostatic latent image, a developing unit that develops the electrostatic latent image of the image holder, a biasing unit that biases the developing unit toward the image holder; and a holding member that holds the biasing unit and is disposed so that a part which is opposite to a biasing direction of the biasing unit is in contact with an image forming apparatus main body directly or via another member.

Image forming apparatus and method

A developer transport device includes a cylinder member including first and second cylinders in which a transport path, through which a developer is transported, is formed, a transport member disposed in the transport path so as to transport the developer by rotating, a to-be-fastened member that is formed on one of the first and second cylinders and that has a first surface formed in a downstream end portion thereof in a direction in which the second cylinder is fastened to the first cylinder and a second surface extending in the direction, and a fastening member that is formed on another one of the first and second cylinders and is to be fastened to the to-be-fastened member, the fastening member having first and a second fastening surfaces that respectively face the first and second surfaces when the fastening member is fastened to the to-be-fastened member.

Developer transport device and image forming apparatus

Provided is an image forming apparatus including plural developing devices that are provided side by side in a direction that is defined by an image forming apparatus main body and respectively form insertion sections into or from which housings including photoreceptors are inserted or withdrawn in a longitudinal direction on one side in a direction in which the plural developing devices are arranged, an exit mechanism that is provided in the developing device, is disposed on an inlet side of the insertion section, and exits a developer on an inside of the developing device, and guide sections of at least two portions that are provided in at least one of the developing devices adjacent to the housing and guide the housing before a surface of the photoreceptor faces the exit mechanism in an insertion direction of the housing when the housing is inserted or withdrawn.

Image forming apparatus and installation or removal of housing including photoreceptors

An image forming apparatus includes a developing device that has a supply port through which developer is supplied, the developing device developing an image with developer; a developer supply device to which the developing device is removably attached, the developer supply device having a discharge port to be connected to the supply port when the developing device is attached to the developer supply device, the developer supply device supplying the developer to the developing device through the discharge port; a seal member that seals between the supply port and the discharge port; and a guide portion that guides attachment of the developing device to the developer supply device or removal of the developing device from the developer supply device so as not to rub the seal member.

Image forming apparatus

A developing device includes a container; a cylindrical first developer-transporting member rotatably supported by the container and whose rotation axis is substantially parallel with a rotation axis of a subjected-to-development member; a first magnet disposed inside the first developer-transporting member and secured to the container; a swinging member supported so as to be capable of swinging relative to the container around the rotation axis of the first developer-transporting member; a cylindrical second developer-transporting member at least one end portion of which is rotatably supported by the swinging member, the second developer-transporting member being adjacent to the first developer-transporting member and rotating in the circumferential direction to transport the developer to the subjected-to-development member; and a second magnet disposed inside the second developer-transporting member and secured to the swinging member.

Growing community of inventors

Kanagawa, Japan

Atsushi Funada