A medium-suction apparatus includes a conveyer to convey a medium in a conveyance direction, a first suction unit to perform suction operation on the medium to attract the medium to the conveyer, and a second suction unit to perform the suction operation on the medium to attract the medium to the conveyer. The second suction unit being disposed next to the first suction unit in a width direction perpendicular to the conveyance direction. The second suction unit starts the suction operation after the first suction unit stalls the suction operation.

An image forming apparatus includes: a toner image forming section; a transfer section; a fixing section; a conveyance roller section disposed on a downstream side of the fixing section in a sheet conveyance direction; a conveyance guide section disposed on a downstream side of the conveyance roller section and including a first guide member disposed on a fixing side of a sheet and a second guide member disposed on a rear surface side of the sheet; a feeding-path-switching section disposed on a downstream side of the conveyance guide section and configured to switch sheet feeding paths; and a nip angle adjusting section configured to change a nip angle of a conveyance nip in accordance with whether a sheet on which an image is formed on a first surface thereof is conveyed, or a sheet on which an image is formed on a second surface thereof is conveyed.

An image forming apparatus includes: a toner image forming section; a transfer section; a fixing section; a conveyance roller section disposed on a downstream side of the fixing section in a sheet conveyance direction; a conveyance guide section disposed on a downstream side of the conveyance roller section and including a first guide member disposed on a fixing side of a sheet and a second guide member disposed on a rear surface side of the sheet; a feeding-path-switching section disposed on a downstream side of the conveyance guide section and configured to switch sheet feeding paths; and a nip angle adjusting section configured to change a nip angle of a conveyance nip in accordance with whether a sheet on which an image is formed on a first surface thereof is conveyed, or a sheet on which an image is formed on a second surface thereof is conveyed.

A transport unit transports a transport medium after the transport medium is newly placed as an uppermost medium in a state in which one or a plurality of placed media are already placed in a processing tray. At this state, at least one of the placed media placed on the processing tray is pressed by a pressing unit at a pressing position. After the transport unit is separated away from the transport medium, the pressing unit can move from the pressing position to a retraction position.

A sheet conveyance apparatus including a transmission unit that transmits an ultrasonic wave toward a sheet and a reception unit that receives the ultrasonic wave includes a change unit that changes a distance of a conveyance path of the sheet according to sheet information about the sheet to be conveyed.

A sheet conveyance apparatus including a transmission unit that transmits an ultrasonic wave toward a sheet and a reception unit that receives the ultrasonic wave includes a change unit that changes a distance of a conveyance path of the sheet according to sheet information about the sheet to be conveyed.

A sheet loading device is provided with a sheet ejection portion, a sheet loading portion, a first detection mechanism, a driving device, a second detection mechanism, and a control portion. The driving device drives the sheet loading portion to ascend/descend between an upper surface detection position and a reference position made to descend by a prescribed distance from the upper surface detection position. The second detection mechanism detects that the sheet loading portion is at the reference position. In a case where sheets of the same type are ejected continuously from the sheet ejection portion, the control portion controls beforehand the sheet loading portion to ascend from the reference position to the upper surface detection position and sets a loadable number of sheets of the sheet loading portion in accordance with an ascending time of the sheet loading portion.

A sheet loading device is provided with a sheet ejection portion, a sheet loading portion, a first detection mechanism, a driving device, a second detection mechanism, and a control portion. The driving device drives the sheet loading portion to ascend/descend between an upper surface detection position and a reference position made to descend by a prescribed distance from the upper surface detection position. The second detection mechanism detects that the sheet loading portion is at the reference position. In a case where sheets of the same type are ejected continuously from the sheet ejection portion, the control portion controls beforehand the sheet loading portion to ascend from the reference position to the upper surface detection position and sets a loadable number of sheets of the sheet loading portion in accordance with an ascending time of the sheet loading portion.

There is provided a sheet post-processing device that has a first tray, outlet rollers, and a control section. The first tray holds sheets for post-processing with respect to the sheets supplied from an image forming device. The outlet rollers discharge the sheet to the first tray. The control section controls a rotational speed of the outlet rollers to be decelerated after a leading end portion of the sheet passes through the outlet rollers and before the leading end portion of the sheet comes into contact with the first tray.

There is provided a sheet post-processing device that has a first tray, outlet rollers, and a control section. The first tray holds sheets for post-processing with respect to the sheets supplied from an image forming device. The outlet rollers discharge the sheet to the first tray. The control section controls a rotational speed of the outlet rollers to be decelerated after a leading end portion of the sheet passes through the outlet rollers and before the leading end portion of the sheet comes into contact with the first tray.