Fuji Xerox Co., Ltd.

Masahiro Uchida

Teppei Yawada

Manabu Furuki

Tatsuhiro Igarashi

Masashi Ikeda

Katsuyuki Kitajima

Takafumi Koide

Masataka Kuribayashi

Yusuke Fukuda

Toyofumi Inoue

Koji Funaba

Hiroyoshi Okuno

Koutarou Yoshihara

Makoto Kamisaki

Kana Yoshida

Satomi Hara

Hiroe Okuyama

Etsuo Tominaga

Chiaki Suzuki

Tetsu Torigoe

Yoshifumi Iida

Hiroshi Nakazawa

Shinpei Takagi

Mona Tasaki

Takahisa Fujii

Atsuhiko Eguchi

Tomohiro Takeda

Satoshi Yoshida

Satoshi Inoue

Hirokazu Hamano

Sakon Takahashi

Masahiro Takagi

Fusako Kiyono

Seiichi Takagi

Shinichi Kuramoto

Yutaka Sugizaki

Michio Take

Taichi Yamada

Yasuhiro Oya

Shota Oshima

Haruhide Ishida

Mutsumi Kikuchi

Rieko Kataoka

Jun Sekiya

Jun Igarashi

Hiroyuki Fukuda

Yoshinari Ueno

Yusaku Shibuya

Eiji Iwasaki

Toyohumi Inoue

Kouzou Ota

An image forming apparatus includes an image holding member, a charging device that charges a surface of the image holding member, an electrostatic charge image forming device that forms an electrostatic charge image on the charged surface of the image holding member, a developing device that has an electrostatic charge image developer containing an electrostatic charge image developing toner and that develops the electrostatic charge image to form a toner image on the surface of the image holding member, and a transfer device that transfers the toner image onto a recording medium, wherein the transfer device includes a belt member and a transfer member, the belt member has an outer surface that contacts the image holding member, and the belt member is winding around the image holding member and the transfer member; and the toner has a binder resin containing an amorphous polyester resin.

Image forming apparatus

An image forming apparatus includes an image holding member, a charging unit; an electrostatic image forming unit, a development unit, a transfer unit; a fixing unit, and a cleaning unit. A toner for electrostatic image development contains a binder resin containing an amorphous resin and a crystalline resin, and paraffin wax. The toner has a volume-average particle diameter of 6 &#x3bc;m to 9 &#x3bc;m, a shape factor SF1 of 140 or more, and a toluene insoluble content within a range of 25% to 40%. The melting temperature of the paraffin wax is 60&#xb0; C. or more and 80&#xb0; C. or less. The absolute value of difference between the melting temperature of the crystalline resin and the melting temperature of the paraffin is 10&#xb0; C. or less.

An image forming apparatus includes a transfer unit which includes a belt member having an outer peripheral surface which contacts an image holding member, and a transfer member, and the belt member is wound around both of the image holding member and the transfer member, wherein a toner to be used includes a binder resin containing an amorphous resin and a crystalline resin and has specific physical properties described in the specification, and paraffin wax having a melting temperature of 60&#xb0; C. to 80&#xb0; C., and an absolute value of a difference between the melting temperature of the crystalline resin and the melting temperature of the paraffin wax is 10&#xb0; C. or less.

An image forming apparatus includes an image holding member, a charging unit, an electrostatic charge image forming unit, a developing unit, a transfer unit, a fixing unit including a fixing belt, a pressurizing rotator that forms a nip by pressurizing an outer peripheral surface of the fixing belt, a sliding member that slides on an inner peripheral surface of the fixing belt in the nip, and a pressing member that presses the fixing belt in the direction of the pressurizing rotator, wherein a toner to be used includes a binder resin containing an amorphous resin and a crystalline resin and has specific physical properties described in the specification, and paraffin wax having a melting temperature of 60&#xb0; C. to 80&#xb0; C., and an absolute value of a difference between the melting temperature of the crystalline resin and the melting temperature of the paraffin wax is 10&#xb0; C. or less.

An image forming apparatus includes a fixing unit including a fixing belt, a pressurizing rotator that forms a nip portion between the fixing belt and the pressurizing rotator by pressurizing an outer peripheral surface of the fixing belt, a first heating rotator that is provided so as to contact an inner peripheral surface of the fixing belt in the nip portion and heats the fixing belt, and a second heating unit that heats the fixing belt separately from the first heating rotator, wherein a toner to be used has physical properties described in the specification and includes an amorphous resin, a crystalline resin, and paraffin wax having a melting temperature of 60&#xb0; C. to 80&#xb0; C., and an absolute value of a difference in a melting temperature between the crystalline resin and the paraffin wax is 10&#xb0; C. or less.

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.

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.

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.

A developing unit includes: a developing roller; a first conveying member provided in a first container, having a first shaft and a spiral blade, that agitates and conveys developer; a second conveying member provided in a second container connected to the first container via a hole, having a second shaft and a spiral blade, that agitates and conveys the developer; and a supplying member having a third shaft and a paddle blade, that supplies the developer conveyed by the first or the second conveying member to a developing roller, wherein: at least one of the first and second shafts includes a first portion that faces the hole and a second portion that does not face the hole; and a diameter of the at least one of the first and second shafts in at least a part of the first portion is smaller than a diameter in the second portion.

Developing unit 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.

An image formation method which remarkably extends developer life while providing size reduction and high speed coloring. Also, a replenishing toner and a method of producing the same, and a toner cartridge. In the image formation method, conducting image formation by an image formation apparatus having a plurality of xerography units, the developer apparatus of at least one xerography unit has a developer recovering mechanism appropriately replenishing a replenishing toner composed of a toner and a carrier into the developer apparatus and recovering an excess portion of a developer from the equipment. The above-mentioned replenishing toner has a carrier content in the range of 5 to 40% by weight, the above-mentioned carrier is a carrier coated with a resin having a specific composition, and/or the above-mentioned toner is in a specific shape. The replenishing toner may be produced using the above-mentioned recovered developer.

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Kanagawa, Japan

Masahiro Uchida