Fuji Xerox Co., Ltd.

Fujifilm Business Innovation Corp.

Hirofumi Iida

Hiroki Ando

Keishi Araki

Mikio Yamaguchi

Ichiro Kawahara

Satoshi Mizoguchi

Hiroki Oka

Hirofumi Hamada

Kanji Shintaku

Shota Nakazawa

An image forming apparatus includes a transfer body that rotates and transfers a transferred image to a target transfer body at a transfer position, plural image holding members that rotate together with the transfer body at different positions along a rotation direction of the transfer body while outer peripheral surfaces of the image holding members come into contact with the transfer body, the image holding members on which a charge erasing operation is sequentially performed after images held on the outer peripheral surfaces sequentially transferred to the transfer body, and in which the charge erasing operation on all the image holding members has been ended, and then rotations of all the image holding members are stopped, a first charge erasing unit that erases charges of an outer peripheral surface of at least one image holding member other than a most downstream image holding member disposed on a most downstream side of the rotation direction with respect to the transfer position, among the plural image holding members, and a second charge erasing unit that erases charges of an outer peripheral surface of the most downstream image holding member and has a charge erasing time shorter than a charge erasing time of the first charge erasing unit.

Image forming apparatus

A charging device includes a first charging unit that charges a target unit, which is to be charged, by coming into contact with the target unit and a second charging unit that charges the target unit by coming into contact with the target unit and in which distribution of a contact region in contact with the target unit is different from distribution of a contact region in the first charging unit.

Charging device and image forming apparatus

A charging device includes: a first charging unit that contacts a unit to be charged to charge the unit to be charged to a first charging potential; and a second charging unit that contacts the unit to be charged on a side upstream of the first charging unit in a direction of movement of the unit to be charged to charge the unit to be charged to a second charging potential that is lower than the first charging potential.

An image forming apparatus includes an image carrier that carries an image to be transferred onto a recording medium, a charging member in contact with the image carrier, the charging member that charges the image carrier, an erase unit that erases charge on the image carrier, a current detector that detects a current flowing to the charging member; a forming unit that forms a charged region on a surface of the image carrier, and forms an erased region on the surface of the image carrier using the erase unit, and a state acquisition unit that acquires a deterioration state of the charging member based on (i) a first current flowing in response to applying a voltage from the charging member to the erased region and (ii) a second current flowing in response to applying a voltage from the charging member to the charged region.

A charging device includes: a charging member that is rotatable and has a peripheral surface to be in contact with a charging target and to which a voltage is to be applied for charging the charging target; a removing member that includes a core and a removing material spirally wound one to less than two times around the core and rotates and comes into contact with the charging member to remove an unnecessary material from the peripheral surface of the charging member; and a detecting unit that detects a current flowing between the charging member and the removing member.

Charging device, image forming structure, and image forming device

A photoconductor unit includes a photoconductor and an electrode. The photoconductor includes a base member that is cylindrical and has a hardness that decreases with increasing distance from a first end toward a second end in an axial direction, and a photosensitive layer formed on an outer peripheral surface of the base member. The electrode is in contact with an inner peripheral surface of an open end portion of the base member at the first end.

Photoconductor unit, process cartridge, and image forming apparatus

Photoconductor unit, process cartridge, image forming apparatus, and method for manufacturing photoconductor unit

An applying device includes an applying member and a contact member. The applying member applies voltage to an image bearing member and has an elastic layer and an endless surface layer. The elastic layer is disposed facing the image bearing member, is rotatable about a rotation axis, and is composed of a foam material. The surface layer surrounds an outer periphery of the elastic layer, is supported by the elastic layer in a non-bonded state, and is rotatable together therewith. The contact member comes into contact with the surface layer at an upstream side, in a rotational direction of the applying member, relative to an imaginary line segment connecting a rotation axis of the image bearing member and the rotation axis of the applying member, so as to apply tension to the surface layer at a contact position between the image bearing member and the applying member.

Applying device and image forming apparatus

Provided is an image forming apparatus including an image holder that is provided to be rotatable, and a charging member that includes a charging member main body and a cover member, in which an outer circumferential surface of the cover member is disposed to be in contact with the image holder, and that charges the image holder, wherein a circumferential speed of one member of the rotating image holder and the rotating charging member main body is greater than a circumferential speed of the other member, and wherein the cover member moves to follow a movement of the one member at a contact portion where the cover member and the image holder come into contact with each other, and a portion of the cover member that is positioned on an upstream side of the contact portion is drawn toward a downstream side.

Image forming apparatus and image forming unit

A charging device includes a charging member and a cleaning member. The charging member is driven and rotated while in contact with an outer peripheral surface of an image carrier which rotates, and charges the image carrier. The cleaning member is driven and rotated while in contact with an outer peripheral surface of the charging member and cleans the outer peripheral surface of the charging member. In the charging device, a radius of the charging member is less than a radius of the cleaning member.

Charging device with charging and cleaning members

Provided is an image forming apparatus including an image holder that is mounted at a predetermined mount position, a charging member that charges the image holder, a cleaning member that cleans the charging member, a holding member that holds the charging member and the cleaning member, includes a mount section on which the cleaning member is mounted, is urged toward the image holder side, and recedes when the image holder is mounted at the predetermined mount position, and a drop-out prevention section that is disposed at a position facing the mount section which is included in the holding member at a receding position and that prevents the cleaning member from dropping out from the mount section.

Growing community of inventors

Kanagawa, Japan

Hirofumi Iida