An image forming apparatus includes: an annular transfer belt having an outer surface on which an image is transferred; a nip portion that forms a nip region for nipping a recording medium with an outer surface of the transfer belt; a facing portion that faces the nip region from an inner side of the transfer belt and transfers the image from the transfer belt to the recording medium in the nip region by charging the transfer belt; and a transport unit including a holding portion that holds the recording medium, transports the recording medium by moving the holding portion, and causes the recording medium together with the holding portion to pass the nip region while holding the recording medium at the holding portion.

A sheet conveyance apparatus includes a sheet conveyor configured to convey a sheet, a guide configured to form a conveyance path through which the sheet is conveyed by the sheet conveyor, and a sensor disposed on a same side as the guide with respect to the conveyance path. The guide includes a retracted portion disposed over a first region in a sheet width direction perpendicular to a sheet conveyance direction, the retracted portion being retracted with respect to a second region of the guide in the sheet width direction so as not to come into contact with the sheet passing through the conveyance path, the first region including a detection region of the sensor in the sheet width direction, the second region being a sheet passing region of the sheet in the sheet width direction excluding the first region.

A movable-member supporter includes: a first support member that includes a first support plate, a first guide unit provided at the first support plate, and a first connection section, the first guide unit guiding movement of a movable member and having one end that extends to one side surface of the first support plate, the first connection section being provided at the one side surface of the first support plate; and a second support member that includes a second support plate, a second guide unit provided at the second support plate, and a second connection section, the second guide unit guiding movement of the movable member and having one end that extends to one side surface of the second support plate, the second connection section being provided at the one side surface of the second support plate and being connected with the first connection section of the first support member.

An image forming apparatus includes a transfer belt, a forming unit, a detection unit, a correction unit, a drive system, a determination unit, and a notification unit. The forming unit forms an image-misregistration detection pattern of a plurality of colors on the belt. The correction unit corrects an image misregistration of an image of each color based on a detection result of the pattern. The determination unit detects a difference amount between a pattern interval of the pattern on the belt and a pattern interval serving as a reference value for each color and determines that an abnormality has occurred in a driving state of the drive system, in response to the difference amount equal to or greater than a threshold value. The notification unit notifies occurrence of the misregistration when the determination unit determines that the driving state is abnormal, based on the difference amount of any one color.

An intermediate transfer belt device has an intermediate transfer belt, a drive roller that drives the intermediate transfer belt, and a pressure roller that presses from an outer surface of the intermediate transfer belt toward the drive roller. The pressure roller is disposed at a position corresponding to a downstream end in a rotating direction C in a contact region between the intermediate transfer belt and the drive roller. The intermediate transfer belt is provided in contact with the pressure roller and such that the outer surface of the intermediate transfer belt is wound around an outer surface of the pressure roller at a predetermined winding angle.

An image forming apparatus includes an image forming unit configured to form a toner image on an image bearing member, a first unit including an intermediate transfer belt on which the toner image is transferred from the image bearing member and a first roller disposed in contact with an inner surface of the intermediate transfer belt to stretch the intermediate transfer belt, the first unit being drawable from a main body of the image forming apparatus, a second unit including a second roller configured to form, with the first roller, a transfer nip portion in which the toner image is transferred from the intermediate transfer belt to a recording material, the second unit being drawable from the main body, and a high-voltage circuit board disposed in the second unit and configured to apply a voltage to the first roller.

Provided is an image forming apparatus including: an annular transfer belt having an outer surface on which an image is transferred; a transferring unit including a transfer cylinder having a transfer area that sandwiches a recording medium with the outer surface of the transfer belt to transfer the image from the outer surface of the transfer belt to the recording medium, and a pair of first rotating bodies disposed on both axial end sides of the transfer cylinder; a pair of circulating members each being wound around the first rotating body and being circulated by rotation of the first rotating bodies; and a holding unit attached to the circulating members, the holding unit configured to hold the recording medium, transport the recording medium with circulation of the circulating members, and pass the recording medium through the transfer area.

Provided is an image forming apparatus including: an annular transfer belt having an outer surface on which an image is transferred; a transferring unit including a transfer cylinder having a transfer area that sandwiches a recording medium with the outer surface of the transfer belt to transfer the image from the outer surface of the transfer belt to the recording medium, and a pair of first rotating bodies disposed on both axial end sides of the transfer cylinder; a pair of circulating members each being wound around the first rotating body and being circulated by rotation of the first rotating bodies; and a holding unit attached to the circulating members, the holding unit configured to hold the recording medium, transport the recording medium with circulation of the circulating members, and pass the recording medium through the transfer area.

An image forming apparatus includes an image bearing member, a transfer member, a power source, a detecting portion, a controller, an environment detecting portion, and a contact member. In a case that an absolute water content acquired on the basis of environmental information is a predetermined threshold or more, the controller sets a limit voltage on the basis of a detection result of the detecting portion in a state in which the recording material is absent in a transfer portion, and the controller controls the power source so that an absolute value of a voltage applied from the power source to the transfer member during contact of the recording material with the transfer member and the contact member is an absolute value or less of the limit voltage.

A toner includes toner base particles. Each of the toner base particles includes a binder resin, a colorant, and inorganic filler. An atomic concentration % of Al in the toner base particles as measured by XRF is 0.35 or greater but 0.85 or less. The toner satisfies 0.8<(M1/M2)/(M3/M4)<1.2. M1 is an atomic concentration % of Al in the toner base particles as measured by XPS, M2 is the atomic concentration % of Al in the toner base particles as measured by XRF, and M3 is an atomic concentration % of Al in particles as measured by XPS, and M4 is an atomic concentration % of Al in the particles as measured by XRF. The particles are particles obtained by classifying the toner base particles into 6/5 Dv, and Dv is a volume average particle diameter of the toner base particles.