Fuji Xerox Co., Ltd.

Fujifilm Business Innovation Corp.

Kabushiki Kaisha Ono Sokki

Yoshitaka Nakajima

Shinichi Kuramoto

Shigeru Inaba

Norihiro Tamazawa

Shota Oba

Tomoyuki Yoshii

Yoshifumi Ozaki

Ryota Tomishi

Masanori Kato

Takashi Ochi

Shigemi Murata

Makoto Hirota

Toshihiro Kanematsu

Katsumi Yamada

Makoto Kanno

Atsushi Funada

Mitsutoshi Hongo

Ayumi Noguchi

Yoshihisa Nakao

Akihisa Maruyama

Junichi Uchiyama

Daisuke Uchimitsu

Kenta Urayama

Shota Igawa

Sadayuki Tsujino

Shinji Okuyama

Fumiyuki Honda

Osamu Maehara

Shiho Matsuda

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 powder transport apparatus includes a housing and first and second transport members. The housing includes first and second transport paths that are separated by a partition wall extending in one direction. The first and second transport paths are connected by first and second connection ports. The first and second connection ports are separated in the one direction with the partition wall interposed therebetween. The first transport member is provided in the first transport path. The first transport member transports powder. The second transport member is provided in the second transport path. The second transport member transports the powder. A transport force of the second transport member at a portion of the second transport member where the second transport member faces the first connection port is smaller than a transport force of the second transport member at a portion where the second transport member faces the partition wall.

Powder transport apparatus

A powder transport apparatus includes a first transport path disposed in the first transport path, a second transport path connected to the first transport path through a first connection port and a junction port, a third transport path connected to the second transport path through a second connection port, a second transport member that is disposed in the second transport path and includes a first shaft provided with a first spiral blade that transports powder toward the first connection port, a second spiral blade that is provided in a portion of the first shaft between the first connection port and the junction port and that has a transport force smaller than a transport force of the first spiral blade in the one direction, and a third transport member disposed in the third transport path. The third transport member transports the powder toward the second connection port.

A developing device includes: a housing having a first transport path through which developer is supplied, a second transport path adjoining the first transport path with a first partition wall therebetween, and a first communication path communicating with the second transport path on a downstream side in a developer transport direction in the first transport path; a first transport member disposed in the first transport path and having an axially rotatable first rotary shaft and a first spiral blade projecting from an outer circumferential surface of the first rotary shaft; a second transport member disposed in the second transport path and having an axially rotatable second rotary shaft and a second spiral blade projecting from an outer circumferential surface of the second rotary shaft; and a first blade member projecting from the outer circumferential surface of the first rotary shaft, at a position facing the first communication path, the blade member discharging the developer onto the second transport path from above the first rotary shaft in the first transport path with the rotation of the first rotary shaft.

Developing device and image forming apparatus having developer replenishing blade

A developing device includes a developer carrier on which an attraction region is set, the attraction region being a region that attracts developer including toner and a carrier, and that carries, in the attraction region, the developer that is to be supplied to an image carrier on which an electrostatic latent image is formed; a regulation member that regulates the developer so that a predetermined amount of the developer is carried by the developer carrier; and a forming unit that is located upstream of the regulation member and that forms, in the attraction region, a first region that restricts a flow of developer supplied to the developer carrier and a second region that is located between the first region and the regulation member and that does not restrict a flow of the developer compared with the first region.

Developing device and image forming apparatus

A developing device includes a development roller, a housing, a suction device, and a discharging device. The development roller rotates to pass a developer to an image carrier. The housing includes an opening, which allows the development roller to face the image carrier therethrough, and a flow-in path, which is a gap formed to allow air to flow therethrough between the development roller and an edge of the opening downstream in a rotation direction of the development roller. The suction device has a suction path having a distal end serving as a suction port that is open to an outside of the housing, and sucks air through the suction port. The discharging device includes a through-hole, which extends through the housing to connect an inside to an outside of the housing, and a discharge path, which extends from the through-hole to the suction port. The discharge path merges with the suction path.

A transporting member includes a rotating shaft and plural helical blades that helically extend around the rotating shaft and that transport a transport object in a direction of the rotating shaft as the rotating shaft rotates, each helical blade including a downstream side surface at a downstream side in a transporting direction and an upstream side surface at a side opposite to the downstream side surface. A portion of at least one of the helical blades has a gap that enables the transport object to move in the direction of the rotating shaft, and the at least one of the helical blades includes an upstream section that extends upstream in a rotating-shaft rotation direction, in which the rotating shaft rotates, from the gap. The upstream section includes a portion in which an inclination angle of the downstream side surface is less than an inclination angle of the upstream side surface.

Transporting member, developing device, and image forming apparatus

A developing device includes a developer carrier that carries a developer to be supplied to an image carrier that forms an electrostatic latent image, a supply unit that supplies the developer containing toner and a carrier to the developer carrier by transporting the developer while agitating the developer along a circulation path formed through rotation of each of plural rotary members, and a delivery unit that receives a collected developer, which is the developer collected from the developer carrier, transports the collected developer by another rotary member different from the plural rotary members of the supply unit, and delivers the collected developer to the circulation path of the supply unit.

Developing device having a delivery unit to transport collected developer and image forming apparatus having the same

A developing device includes: a container for accommodating developer, the container having an exhaust port; and a merging section where airflows directed from the interior of the container to the exhaust port join together.

Developing device and image forming apparatus with exhaust port for discharging air

An image forming apparatus includes an image carrier that holds an image, a developer carrier that holds a developer to be supplied to the image carrier, a transport member that transports the developer in an axial direction of the developer carrier, and a restraint member that restrains the developer, which has scattered as a result of being transported by the transport member, from moving toward the developer carrier.

Image forming apparatus and developing device

A developing device includes a container that contains developer; a rotating body that rotates while carrying the developer and supplies the developer to a latent image formed on an image carrier; a channel through which air in the container is discharged out of the container; a first member that is positioned downstream of a position at which the developer is separated from the rotating body in a rotation direction of the rotating body and with which the developer separated from the rotating body comes into contact; and a second member that is positioned downstream of the first member in the rotation direction of the rotating body and with which the developer separated from the rotating body comes into contact.

A developing device includes a developer carrier that opposes an image carrier and rotates while carrying developer on a surface thereof; and a container that supports the developer carrier in a rotatable manner and contains the developer, the developer containing toner, first carrier subjected to frictional charging together with the toner, and second carrier having a diameter greater than a diameter of the first carrier and an electrical resistance lower than an electrical resistance of the first carrier.

A developing device includes a developing housing that contains developer; a developer carrier that transports the developer; a layer-thickness regulating member that is provided for an upstream gap between the developer carrier and the developing housing and that regulates a layer thickness of the developer; and a sealing member that is provided for a downstream gap between the developer carrier and the developing housing. The sealing member is fixed to the developing housing at one side and is in contact with the developer on the developer carrier at the other side. The sealing member has cuts extending from a free end of the sealing member by approximately 60% or more of a dimension of the sealing member from the free end to a fixed end in the width direction, and is at an angle of approximately 30&#xb0; or less with respect to a reference line.

Developing device and image forming apparatus including the same

A transporting member includes multiple helical blades that helically extend around a rotation shaft and that have an upstream-side blade and a downstream-side blade, an end portion of the upstream-side blade and an end portion of the downstream-side blade overlapping in a direction perpendicular to an axial direction of the rotation shaft, the multiple helical blades transporting an object in the axial direction via rotation of the rotation shaft; a gap portion that divides the upstream-side blade and the downstream-side blade, the upstream-side blade and the downstream-side blade being arranged at a certain angular interval in a circumferential direction of the rotation shaft; and a regulating portion that regulates an amount of the object that passes through a space between the upstream-side blade and the downstream-side blade in a direction in which the object is transported.

Growing community of inventors

Kanagawa, Japan

Yoshitaka Nakajima