An image forming apparatus, comprising a conveyance path configured to convey an image receiving medium; a fixing device configured to fix an image formed on the image receiving medium; a first roller arranged at the downstream side of a conveyance direction of the image receiving medium with respect to the fixing device, the first roller comprising an axis; a second roller configured to face the first roller and an end thereof of which protrudes towards a central part of the conveyance path with respect to an end of the first roller at the central part of the conveyance path in a first direction substantially parallel to the axis; and a protrusion arranged at the second roller side to protrude towards the first roller side from the second roller side and a protruding amount of which is greater than that of the second roller.

A sheet stacking tray includes a first stacking portion, a second stacking portion, and a base portion. In a sheet widthwise direction perpendicular to the sheet discharge direction, the first stacking portion includes a first sheet stacking surface having a first stacking width within a range from one half of a sheet width of a maximum-size sheet to be discharged up to the sheet width of the maximum-size sheet. The second stacking portion includes a second sheet stacking surface having a second stacking width smaller than the first stacking width. A border between the first stacking portion and the second stacking portion lies on a discharge-direction upstream side of a contact point where a leading end portion of the maximum-size sheet comes into contact with the sheet stacking part while the sheet is discharged.

According to one embodiment, a sheet post-processing apparatus includes: a standby unit configured to put a sheet on standby, the standby unit including a tray member on which the sheet is placed; a corrugation forming unit configured to form a corrugation in a direction orthogonal to a conveying direction on the sheet in the standby unit, the corrugation forming unit integrally provided with the tray member; and a processing unit disposed below the standby unit and configured to process the sheet supplied from the standby unit, wherein the corrugation forming unit includes: a projecting roller projecting upward from a conveyance reference plane in the standby unit; and a housing unit configured as a part of the tray member to house the projecting roller below the conveyance reference plane.

A printing device includes a first ejector that ejects a recording medium to an exterior, a second ejector that enhances a rigidity of the recording medium more than by the first ejector, and ejects the recording medium to the exterior, and an ejector selector that selects either the first ejector or the second ejector.

A printing device includes a first ejector that ejects a recording medium to an exterior, a second ejector that enhances a rigidity of the recording medium more than by the first ejector, and ejects the recording medium to the exterior, and an ejector selector that selects either the first ejector or the second ejector.

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.

An image forming apparatus includes an output unit to which a recording medium on which an image has been formed is output, the output unit including an output unit body, and an extension portion that is disposed on the output unit body so as to be extendable from the output unit body in an output direction of the recording medium, the extension portion including a handle portion that is recessed in a direction away from a back surface of the recording sheet so as allow a finger to be hooked in a direction in which the extension portion is extended in the output direction of the recording medium, the back surface being a surface that is in contact with the output unit body, and a protrusion that protrudes toward the back surface of the recording medium from the extension portion.

An image forming apparatus includes an output unit to which a recording medium on which an image has been formed is output, the output unit including an output unit body, and an extension portion that is disposed on the output unit body so as to be extendable from the output unit body in an output direction of the recording medium, the extension portion including a handle portion that is recessed in a direction away from a back surface of the recording sheet so as allow a finger to be hooked in a direction in which the extension portion is extended in the output direction of the recording medium, the back surface being a surface that is in contact with the output unit body, and a protrusion that protrudes toward the back surface of the recording medium from the extension portion.

A slacking tab device includes a first tab member and a second tab member. The first tab member forms a first angle therewith and the second tab member forms a second angle less than the first angle. The first tab member contacts a media. The second tab member receives the media from the first tab member and guides the media to an output region.

A printer includes a guide frame, a deforming section, and a lever member. The guide frame includes a transport path. The deforming section includes a toothed roller, a supporting holder, and a torsion spring and deforms paper. The toothed roller comes into contact with the paper discharged from the transport path. The supporting holder is configured to pivot between a first position at which the toothed roller is located on the transport path and a second position at which the toothed roller is not located on the transport path. The torsion spring presses the supporting holder from the second position to the first position. The lever member is configured to switch between a regulating state in which pivoting of the supporting holder at the first position or the second position is regulated and a non-regulating state in which pivoting of the supporting holder is not regulated.