Fujifilm Business Innovation Corp.

Fuji Xerox Co., Ltd.

Chihiro Iijima

Yoshiki Matsuzaki

Kazuyuki Yagata

Toshihiro Goda

Shohei Miyagawa

Hiroyuki Suzuki

Tomoaki Yoshioka

Yoko Miyamoto

Takashi Hoshino

Toshiaki Baba

Naohito Otsuki

Minoru Yoshida

Shinji Okuyama

Hirotake Eguchi

Takehiko Koizumi

Yuta Chino

Yasuhiro Kurokawa

Motohiro Tokairin

Masataka Momma

An image forming apparatus includes: a fixing cylinder, having a groove formed in an outer portion thereof in a rotational radial direction thereof; a delivery cylinder; plural holding members configured to hold a recording medium when it passes around the delivery cylinder toward the fixing cylinder, and arranged in a length direction of a circulating member, each holding member being disposed in the groove when the holding member passes along the outer portion of the fixing cylinder; and a pressure unit applying a pressure to the recording medium as it passes between the pressure unit and the fixing cylinder, the pressure unit coming into contact with an end portion of the groove in a rotation direction of the fixing cylinder before or after a period during a holding operation when one of the holding members holds the recording medium.

Image forming apparatus having a pair of chains wound around a fixing roller and a transfer roller

Provided is an image forming apparatus including a transfer cylinder having a first groove formed in an outer portion in a rotational radial direction. The apparatus also includes a fixing cylinder having a second groove formed in an outer portion in a rotational radial. A looped-shape circulating member that is wrapped around the transfer cylinder and the fixing cylinder. The circulating member supports plural holding members configured to hold the recording medium. The apparatus also includes a pressure unit that is rotatably supported and configured to permit the recording medium to pass between the pressure unit and the fixing cylinder while a pressure is applied. The apparatus also includes a rotatable transfer roller opposing the transfer cylinder, the transfer roller opposing the first groove when a rotationally upstream end portion of the second groove in the fixing cylinder is in contact with the pressure unit.

An image forming apparatus includes an image forming target looped around plural rotators including a driving roller, having at least one straight portion that is shaped straight when viewed in an axial direction of the driving roller, and transported by the driving roller and the rotators, and three or more image formers arranged along the straight portion and configured to form images on the image forming target. An adjacency distance along the straight portion between the image formers adjacent to each other on the straight portion is an integral multiple of an outer peripheral length of the driving roller. The adjacency distance at a downstream end is shorter than the adjacency distance at an upstream end, and one of the adjacency distances is equal to or shorter than the adjacency distance that is relatively on an upstream side.

Image forming apparatus with geometric configuration that reduces misregistration of images

An image forming apparatus includes an image forming target to be transported along one direction, three or more image formers arranged away from each other along the one direction and configured to form images on the image forming target, and an image forming target winding motion correcting roller rotatably in contact with an inner peripheral surface of the image forming target and positioned on a downstream side of the image former at an upstream end in a transport direction of the image forming target so that plural image formers are positioned on a downstream side of the image forming target winding motion correcting roller. A distance between the plural image formers positioned on the downstream side of the image forming target winding motion correcting roller is an integral multiple of an outer peripheral length of the image forming target winding motion correcting roller.

Image forming apparatus

An image forming apparatus includes: a colorant image former; an image holder configured to hold a colorant image formed by the colorant image former and to be rotationally driven; a transfer member configured to transfer the colorant image onto a recording medium, which is transported from an upstream side, by sandwiching the recording medium between the transfer member and the image holder, and rotationally driving the transfer member to transport the recording medium to a downstream side; and a contact-and-separation mechanism configured to relatively contact or separate the image holder and the transfer member, in which, in response to an abnormality being detected, the image forming apparatus operates in a mode in which the contact-and-separation mechanism relatively separates the image holder and the transfer member, and then rotational driving of the transfer member is stopped after rotational driving of the image holder is stopped.

An image forming apparatus includes a formation target that is wound around rotating bodies including a driving roller and transported by the rotating bodies including the driving roller while forming a shape having linear portions each of which forms a different angle, which is an acute angle or an angle of zero degrees, with a horizontal direction when viewed in an axial direction of the driving roller, first image forming bodies that are arranged along one of the linear portions in such a manner as to be spaced apart from each other by a first distance and that form images onto the formation target, and second image forming bodies that are arranged along another one of the linear portions, the other linear portion forming the angle larger than the angle formed by the one linear portion, in such a manner as to be spaced apart from each other by a second distance shorter than the first distance and that form images onto the formation target.

Image forming apparatus with a reduced dimension in a horizontal direction

Provided is an image forming apparatus including a positioning portion provided upstream of a transfer portion in a transport direction of a recording medium. The positioning portion positions the medium using a leading end of the medium. Additionally included is a detector that is disposed downstream of the positioning portion in the transport direction, and that detects passage of the leading end of the medium; and a controller that controls a transport speed in a period from when the leading end of the medium passes through the detector to when the leading end of the medium passes through a target position situated downstream of the detector in the transport direction, in accordance with a time since transport of the medium is started from the positioning portion until the leading end of the medium passes through the detector.

Image forming apparatus having recording medium positioning portion and control of transport speed

An image forming apparatus includes at least a load unit, a driving unit that drives the load unit, and a controller that controls the driving unit. The controller determines that at least one of the load unit and the driving unit malfunctions if a velocity change time period that the driving unit has taken to reach a second velocity from a first velocity is off a predetermined threshold value.

Image forming apparatus, image forming method, and non-transitory computer readable medium

A drive force transmission device includes a frame that supports therein plural gears transmitting a rotational drive force and that has a flat portion extending in a direction intersecting a direction in which the rotational drive force is transmitted. The drive force transmission device has an air channel that allows air sucked from an outside of the frame to pass therethrough so as to exhaust the air to the outside of the frame.

Drive force transmission device having air channels and image forming apparatus

Provided is a driving force transmission device including a sun gear that rotates by receiving a driving force from a driving source, an internal gear that is arranged coaxially with the sun gear, a planetary gear that engages with the sun gear and the internal gear, a rotary member that is provided coaxially with the sun gear and the internal gear and installed with the planetary gear so as to rotate corresponding to revolution of the planetary gear, and an urging member that urges the planetary gear toward the rotary member.

Driving force transmission device, and image forming apparatus

A transfer device includes: an endless transfer-belt that includes a first transfer-portion, at which a developer image is transferred onto an outer periphery surface of the transfer-belt, and a second transfer-portion, at which the developer image is transferred onto a member-to-be-transferred, the transfer-belt moving toward the second transfer-portion from the first transfer-portion; a transfer-member that, at the second transfer-portion, sandwiches the member-to-be-transferred between the transfer-member and the transfer-belt, and transfers the developer image to the member-to-be-transferred; a tension application unit that includes a resilient member, and a tension application member that urges the transfer-belt with resilient force of the resilient member and applies tension to the transfer-belt; and a damping member that causes damping force to act on the tension application member when the tension application member moves in one of a direction in which the tension application member urges the transfer-belt, or an opposite direction.

Growing community of inventors

Kanagawa, Japan

Chihiro Iijima