Fuji Xerox Co., Ltd.

Yasutaka Matsumoto

Satoshi Shigezaki

Satoshi Honobe

Shigeru Tanaka

Takeshi Iwanaga

Masaki Hirakata

Yukihiro Ichiki

Toshiyuki Matsui

Nobuyuki Torigoe

Hideya Katsuhara

Tomokazu Kurita

Taro Mitsui

Ryouta Kubo

An image forming apparatus includes an image carrying unit that carries a toner image on a surface of the image carrying unit along with rotation of the image carrying unit to transfer the toner image onto a target transfer unit, and a supply unit that supplies a larger amount of fatty acid metal salt to the image carrying unit as a rotation speed of the image carrying unit increases.

Image forming apparatus with variable supply of fatty acid metal salt

An image forming apparatus includes a photoreceptor that includes a conductive substrate, a photosensitive layer, and an inorganic surface layer arranged in that order, the inorganic surface layer containing a group 13 element and oxygen; a charging unit; an electrostatic image-forming unit; a developing unit; a transfer unit; a cleaning unit that performs cleaning by causing the cleaning blade to contact the surface of the photoreceptor; and a supply unit that supplies a fatty acid metal salt to a position where the cleaning blade in the cleaning unit contacts the photoreceptor. When the fatty acid metal salt is supplied, a portion of the surface of the photoreceptor downstream of the supply unit and upstream of the cleaning unit in a rotating direction of the photoreceptor is covered with a metal derived from the fatty acid metal salt at a coverage of about 40% or more.

Image forming apparatus and unit for image forming apparatus

A developing device includes a developer container that accommodates an electrostatic image developer including toner containing a toner particle and a zinc stearate particle, a ratio (D/D) of a volume-average particle size (D) of the toner particle to a volume-average particle size (D) of the zinc stearate particle being about 1.9 or more; a developer carrier that supplies the toner to an image carrier; a supply conveyor that supplies the electrostatic image developer while conveying the electrostatic image developer; a mixing conveyor that conveys the electrostatic image developer while mixing the electrostatic image developer; and a partition disposed between the supply conveyor and the mixing conveyor. The electrostatic image developer is moved from the supply conveyor to the mixing conveyor through a first passage and is moved from the mixing conveyor to the supply conveyor through a second passage.

Developing device with toner containing a toner particle and a zinc stearate particle, and process cartridge, image forming apparatus, and image forming method

An image forming apparatus includes a rotatable image carrier that carries an image; a charging unit that includes a rotatable charging member that charges the image carrier; a developing unit that supplies developer to the image carrier that is charged, the developer containing at least toner and a carrier, an external additive being added to the toner; a transfer unit that includes a transfer member that transfers the image formed on the image carrier to a transfer material; and a cleaning unit that cleans a surface of the image carrier. In the image forming apparatus, during image non-formation, the external additive is supplied to the image carrier that rotates, and the image carrier and at least the transfer member are separated from each other.

Image forming apparatus without color points appeared in an image

An image forming apparatus includes a carrier that carries a toner image formed by a toner, the toner including a toner body and an external additive, a circularity of the external additive being about 0.5 to about 0.9, a transfer member that holds a transferred body between the transfer member and the carrier, the transfer member transferring the toner image to the transferred body, and a removing member that includes a contact portion, the contact portion contacting the transfer member, the removing member removing toner that adheres to the transfer member from the toner image carried by the carrier, the contact portion being made of an elastic material that satisfies an inequality (1) below:&#x2267;&#x2212;2.5&#xd7;+102&#x2003;&#x2003;(1)where A denotes a pure water contact angle (&#xb0;) at 23&#xb0; C. and 55% RH, and B denotes a 100% modulus (MPa) at 23&#xb0; C.

Image forming apparatus and removing member

An image forming apparatus includes a developing unit and a supply amount increasing unit. The developing unit supplies oil-impregnated particles to an image carrier and develops an electrostatic latent image by a developer on the image carrier which is electrically charged to a polarity that is opposite a polarity of the developer which is electrically charged to a positive polarity or a negative polarity, based on a potential difference between a developing part and the image carrier. The supply amount increasing unit increases an amount of supply of the oil-impregnated particles to the image carrier by adjusting the potential of the image carrier, while a developing operation is not being performed by the developing unit.

Image forming apparatus and image forming method

An image forming apparatus includes a latent image carrier, a first developing unit, a second developing unit, a transfer unit, a removing member, and a fixing unit. An average circularity of particles having an average particle diameter of no less than 100 nm and no more than 300 nm among particles included in a second external additive is less than an average circularity of particles having an average particle diameter of no less than 100 nm and no more than 300 nm among particles included in a first external additive.

Image forming apparatus

A collected developer conveying device includes: a conveying passage through which collected developer is conveyed; a conveying member that is disposed in the conveying passage, and conveys the developer in the conveying passage by rotation thereof; a developer carrying body that holds developer on a surface thereof, and that is relatable; and a ventilation passage through which air passes from a developing container including the developer carrying body, wherein the conveying passage includes an air flow region formed in a part thereof upper than a rotational center of the conveying member in a gravitational direction, in a side of the conveying passage in which the conveying member rotates from an upper part of the conveying passage to a lower part thereof in the gravitational direction.

Collected developer conveying device and image forming apparatus which vents a developing container

A cleaning device has: a cleaning member contacting a body-to-be-cleaned at a predetermined nip width, and cleaning a surface of the body-to-be-cleaned; and a supporting member supporting a peripheral surface of the cleaning member. The cleaning member is supported with predetermined degrees of freedom by the supporting member and a surface of the body-to-be-cleaned.

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Kanagawa, Japan

Yasutaka Matsumoto