An image forming device includes an image carrier, a transfer member, a fixing device, a conveyance member, and a controller. The transfer member forms a transfer nip that transfers an image carried on the image carrier to a recording medium. The fixing device fixes the image on the recording medium. The conveyance member is located downstream of the transfer member in a conveyance direction of the recording medium and feeds the recording medium to the fixing device. The controller variably controls position of the conveyance member.

A sheet conveyance apparatus includes a first conveyor, a second conveyor provided downstream of the first conveyor, a first motor configured to drive the first conveyor, a second motor configured to drive the second conveyor, a speed determining unit configured to determine a rotation speed of a rotor of the second motor, a command determining unit configured to determine a command speed representing a target speed of the rotor of the second motor, and a controller configured to control a drive current flowing through a winding of the second motor so that a deviation between the command speed determined by the command determining unit and the rotation speed determined by the speed determining unit is decreased. The command determining unit determines the command speed based on a value corresponding to a rotation speed of a rotor of the first motor.

A sheet transport device includes: a chain that circulates and moves; a driving unit that circulates and moves the chain; a holding unit that is provided on the chain and holds an end portion of a sheet along a transport direction of the sheet; and a first positioning portion that positions the holding unit on both sides along a direction intersecting both the transport direction of the sheet and a width direction of the sheet while the chain moves along the driving unit.

An image forming apparatus includes a first housing inside an image forming unit, a second housing that includes a fixing unit, a conveyance belt provided in the first housing to convey a sheet, first and second intake fans, and first and second duct units. The first intake fan takes in air to suction the sheet to an outer peripheral surface of the conveyance belt. The first duct unit provided in the first housing forms an air path for exhausting air from the first intake fan. The second intake fan provided in the second housing takes in air near the fixing unit. The second duct unit provided in the second housing passes air flowing in from the first duct unit and the air taken in by the second intake fan. The second duct unit includes an exhaust port for exhausting air outside and a filter through which the exhausted air passes.

A parameter determination apparatus includes: a first hardware processor that acquires a value related to a plurality of types of sheet physical properties; a second hardware processor that specifies at least any of a sheet type or a basis weight based on an acquired value related to a sheet physical property; and a third hardware processor that specifies a parameter related to sheet processing without specifying at least any of the sheet type or the basis weight, based on an acquired value related to a sheet physical property.

An image formation apparatus according to an embodiment may include: an image carrier; a transfer part facing the image carrier; a transfer belt that passes between the image carrier and the transfer part, includes a conveyance surface, and configured to convey a medium on the conveyance surface; plural rollers to which the transfer belt is stretched, the plural rollers including a downstream roller provided on a downstream side in the medium conveyance direction among the plural rollers; and a separating member facing the downstream roller and configured to separate the medium from the transfer belt. The separating member includes a guide surface to guide the medium, wherein the guide surface is arranged at an angle such that a distance from the guide surface to a conveyance reference plane becomes shorter as proceeding in the medium conveyance direction, the conveyance reference plane being a virtual plane extending the conveyance surface.

An image forming apparatus includes a first housing inside an image forming unit, a second housing that includes a fixing unit, a conveyance belt provided in the first housing to convey a sheet, first and second intake fans, and first and second duct units. The first intake fan takes in air to suction the sheet to an outer peripheral surface of the conveyance belt. The first duct unit provided in the first housing forms an air path for exhausting air from the first intake fan. The second intake fan provided in the second housing takes in air near the fixing unit. The second duct unit provided in the second housing passes air flowing in from the first duct unit and the air taken in by the second intake fan. The second duct unit includes an exhaust port for exhausting air outside and a filter through which the exhausted air passes.

A recording-material-transporting apparatus includes: a transport unit that transports a recording material along a transport path; an image reading unit that is disposed on one side of the transport path and that reads an image formed on the recording material transported along the transport path; and a rotating member disposed opposite the image reading unit with the transport path provided therebetween. At least one portion of the rotating member contacts the image reading unit, or a rotating member support that supports the rotating member contacts the image reading unit.

An image forming apparatus includes a transfer portion, a fixing unit, a conveyance belt configured to convey a sheet from the transfer portion toward the fixing unit, a driving portion configured to drive the conveyance belt, and a controller configured to control the driving portion. The controller is configured to, in a case of switching the image forming apparatus to a standby state in which the image forming apparatus is ready to start an image forming operation and stands by for input of an image forming job, execute preheating in which the fixing unit is preliminarily heated, and cause the driving portion to rotate the conveyance belt while the preheating is executed.

A sheet feeding device includes a sheet feeding roller, a following roller, a rotational speed detection part, and a control part. The rotational speed detection part is configured to detect a rotational speed of the following roller. The control part is configured to accelerate a rotation of the sheet feeding roller and to adjust a sheet interval. The control part obtains a rotational rate of the following roller to the sheet feeding roller based on the rotational speed of the following roller, obtains an actual linear velocity of the sheet based on the rotational rate of the following roller and a theoretical linear velocity of the sheet after accelerating the rotation of the sheet feeding roller, and then adjusts the sheet interval based on the actual linear velocity of the sheet.