Fuji Xerox Co., Ltd.

Manabu Furuki

Tatsuhiro Igarashi

Teppei Yawada

Masashi Ikeda

Masahiro Uchida

Makoto Kamisaki

Jun Sekiya

Yasuhisa Morooka

Naoki Ota

Yuka Ishihara

Mona Tasaki

Emi Takahashi

Koji Fukushima

Yoshihiro Maekawa

Naoki Ohnishi

Jin Kasono

Masato Ono

Hiroshi Takayama

Hiroyuki Miura

Yoshinari Ueno

Koji Funaba

Eiji Funabashi

Kazuo Sueyoshi

An image forming apparatus includes an image holding member, a charging device, an electrostatic charge image forming device, a developing device having a toner, a transfer device, and a fixing device, wherein the fixing device includes a fixing belt, a rotational member, and a heater; the toner contains an amorphous polyester resin as a binder resin; and the toner has a weight average molecular weight Mw and a number average molecular weight Mn, Mw is from 25000 to 60000, and Mw/Mn is from 5 to 10, and has an infrared absorption spectrometry, the ratio of absorbance for a wavelength of 1500 cmto absorbance for a wavelength of 720 cmis 0.6 or less, and the ratio of absorbance for a wavelength of 820 cmto absorbance for a wavelength of 720 cmis 0.4 or less.

Image forming apparatus

An image forming apparatus includes an image forming unit including an image carrier, a developing device that includes a developer containing a toner, and a cleaning device including a blade; and a transfer device. The toner contains toner particles having a volume-average particle size of 3 &#x3bc;m or more and 5 &#x3bc;m or less, a spherical inorganic external additive having a number-average particle size of 80 nm to 200 nm, and an organic component. In the cleaning device, an external additive residue in or near a contact region between the image carrier and the blade contains the organic component and an inorganic component, the area ratio of the organic component to the inorganic component is 3/7 or more and 7/3 or less, and the area ratio of the inorganic component that is spherical to the external additive residue is 30% or more.

An electrostatic charge image developer includes: toner particles; silica particles treated with a silicone oil, which are externally added to the toner particles; and a carrier, wherein a volume average particle diameter of the carrier is equal to or greater than 20 &#x3bc;m and smaller than 30 &#x3bc;m, and a quantity ratio of an elemental silicon derived from a silicone oil and an elemental silicon derived from silica which are present on the surface of the carrier (silicone oil-derived elemental silicon/silica-derived elemental silicon) is in a range of 0.05 to 0.2.

Electrostatic charge image developer, process cartridge, and image forming apparatus

A developing device includes a container that contains a developer containing a toner therein, a supply tank that is provided adjacent to the container and is supplied with the toner at a supply point within the supply tank, a transport member that is rotatably driven within the supply tank to transport the toner to the container, and an annular member, wherein the annular member has an inner diameter larger than a diameter of a rotatably-driven shaft in the transport member, the rotatably-driven shaft extends through the annular member, and the annular member is held in a partial section in a longitudinal direction of the rotatably-driven shaft.

Developing device and image forming apparatus

An image forming device includes an image carrier, a charging device that charges the surface of the image carrier, an electrostatic image forming device that forms an electrostatic image on the surface of the image carrier, a developing device that uses a developer containing toner particles and external additives adhering to the surface of the toner particle to develop the electrostatic image into a toner image, a transfer device that transfers the toner image to a recording medium, a cleaning device having a blade that cleans off residual toner from the image carrier, a suction device that suctions all or part of residual toner excepting the external additives released from the surface of the toner particles, and a fixing device that fixes the toner image to the recording medium.

Image forming device having a suction device

A developing device includes a container chamber that contains developer containing carrier and toner; a supply portion that is adjacent to the container chamber and to which supplying toner or supplying developer, which contains the supplying toner and supplying carrier, is supplied at a supplying position in the supply portion; a transporting member that transports the supplying toner or the supplying developer toward the container chamber in the supply portion; and a guide capable of guiding the developer to the supplying position.

An image forming apparatus includes a charging unit that includes a conductive member which contacts with a surface of an image holding member, and that applies only a DC voltage to the conductive member to charge the surface of the image holding member; and a cleaning unit that has a blade which contacts with the surface of an image holding member and cleans the surface with the blade after a toner image is transferred onto a recording medium, wherein a developer includes toner particles, silica particles treated with a silicone oil, and a carrier, a volume average particle diameter of the carrier is from 20 &#x3bc;m to 35 &#x3bc;m, and a quantity ratio of an elemental silicon derived from a silicone oil and an elemental silicon derived from silica which are present on the surface of the carrier is from 0.05 to 0.2.

Image forming apparatus and image forming method using a toner carrier containing silicon derived from silica and silicone oil

A powder container includes a container chamber that contains powder; a transporting member that transports the powder in the container chamber; an opening that is provided in a wall of the container chamber and through which the powder is discharged out of the container chamber as the transporting member transports the powder; and a closing member that closes a lower portion of the opening and moves vertically relative to the opening in a direction opposite to a direction of vertical movement of the opening due to tilting of the container chamber.

Powder container and image forming apparatus

A cleaning device includes a removal member that removes residual objects from a surface of a target cleaning body by contacting with the surface in a linear manner and rubbing against the surface and forms a piled body which is constructed of a portion of the residual objects at a contact location, and a pressure device that presses the piled body to increase a strength of the piled body.

Cleaning device and image forming apparatus

A cleaning device includes a removal member that forms piled bodies of residual objects at a contact location and removes residual objects from a surface of a target cleaning member by contacting with the surface in a linear manner and rubbing against the surface, and a smoothing member that smooths out the piled bodies by moving along the contact location.

A cleaning device that cleans a residual toner from a cleaning target includes a cleaning blade that blocks the residual toner containing toner particles and an external additive on the cleaning target and scrapes the residual toner from the cleaning target, a measurement unit that measures an amount of the external additive in the residual toner which is blocked by the cleaning blade and remains on the cleaning target, and a control unit that increases an amount of a toner that is supplied to the cleaning target based on a measurement result obtained by the measurement unit.

Cleaning device, and image forming apparatus

Provided is a developing device including an accommodating unit that contains a developer, a transport member that holds the developer on an outer surface and transports the developer outside from the accommodating unit, a layer regulating member that faces the outer surface of the transport member with a gap, extends in a direction intersecting a direction in which the developer is transported, and regulates a layer thickness of the developer, and a removal member that is inserted into the gap, moves along the direction in which the layer regulating member extends, and removes the developer from the gap.

Provided is a cleaning unit including a removing member that contacts with a surface of a cleaning target and removes adherent matters on the surface of the cleaning target, a storage section that stores the adherent matters removed by the removing member, and a supply member that has a blade and rotates the blade in the storage section to supply some of the adherent matters stored in the storage section to the surface of the cleaning target.

Cleaning unit, and image forming apparatus

Provided is a toner transport device including a transport member that transports a developer in one direction, a toner feeding member disposed adjacent to, in a direction crossing the one direction, an end portion of the transport member, and a housing that is provided with a toner receiving port which receives supply of toner in an upper section of the toner feeding member, and accommodates the transport member and the toner feeding member, wherein the toner feeding member includes a rotating shaft, and a flat plate portion that protrudes in a direction away from a shaft member with one side thereof being connected to the shaft member and a front end portion away from the shaft member having a tapered shape, the flat plate portion rotating along with rotation of the shaft member to scrape the toner that moves from the toner receiving port toward the toner feeding member.

Toner transport device, and image forming apparatus

A developing device includes: a container that contains a developer including toner; a partition that forms a plurality of chambers by partitioning an interior space of the container; an agitation mechanism that agitates the developer in the interior space and moves the developer between the plurality of chambers; a transport section that is supplied with the developer from the container, and transports the developer to a surface of an image carrier that carries an electrostatic latent image such that the transported developer is close to or contacts the surface of the image carrier, thereby developing the electrostatic latent image; and a driving mechanism that moves at least the partition.

Growing community of inventors

Kanagawa, Japan

Manabu Furuki