A relay conveyance device detachably mounted on an image forming apparatus body is provided with a fixing member that holds a mounting state of the relay conveyance device to the image forming apparatus body. The fixing member is provided with a relay connector that relays the image forming apparatus body and the post-processing device. The post-processing device is electrically connected to the image forming apparatus body via the relay connector.

An image forming apparatus, having a housing with an opening, an image forming unit, a path to guide a recording medium toward the opening, a reversible roller disposed in the path, and an intermediate reversible roller disposed between the image forming unit and the reversible roller, is provided. A rotating direction of the reversible roller is switchable between a first rotating direction and a second rotating direction opposite from the first rotating direction. A circumferential speed of the reversible roller is switchable between a predetermined circumferential speed and none. A rotating direction of the intermediate reversible roller is switchable between a third rotating direction and a fourth rotating direction opposite from the third rotating direction. The circumferential speed of the reversible roller in the first rotating direction is reduced to be lower than the predetermined circumferential speed while the intermediate reversible roller is rotating in the third rotating direction.

A post-processing apparatus for post-processing paper discharged from an image forming apparatus comprises: a paper discharging roller for conveying both first and second paper sequentially discharged from an image forming apparatus to an intermediate loading part; a main paddle part for conveying the first and second paper loaded on the intermediate loading part to a compiling region; a reverse roller for conveying, together with the main paddle part, the first and second paper to the compiling region; and a binding part for processing the first and second paper conveyed to the compiling region, the paper discharging roller allows the first paper to stand by on a standby path, and conveys the first and second paper to the intermediate loading part in a state in which the leading end of the first paper protrudes further than the leading end of the second paper.

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.

A sorting device is mounted, in an image forming apparatus, in a sheet discharge space open at its front and sheet-discharge-direction downstream side, insertably or extractably at the downstream side. The sorting device includes a base portion, a tray portion, and a flexible member. The base portion is mounted, with the tray portion, in the base portion. The base portion has, in its upstream part in sheet discharge direction, a base inclined portion inclined upward downstream. With the base portion mounted in the bottom portion, the base inclined portion faces, across a predetermined gap, a bottom inclined surface inclined upward downstream in discharge direction. The tray portion is supported on the base portion to be reciprocatable in sheet width direction orthogonal to discharge direction. The flexible member is fitted to the base inclined portion and fills the gap between the base inclined portion and the bottom inclined surface.

A printer apparatus includes a printer main body having a platen roller and a print head to print on recording paper, a cutter unit configured to cut the recording paper, and a presenter unit connected to the cutter unit, wherein the recording paper on which the print head has printed enters the presenter unit through the cutter unit, and comes out from a discharge slot of the presenter unit, wherein the presenter unit includes a first roller and a second roller configured to convey the recording paper placed therebetween, and a flapper disposed along a transportation path of the recording paper between the cutter unit and both the first roller and the second roller, and configured to be flipped open to an outside of the presenter unit to expose the transportation path, wherein an angle at which the flapper is open is selectively set to one of a plurality of different angles.

A sheet post-processing apparatus includes a sheet introducing unit, a first sheet discharge unit, a second sheet discharge unit, a sheet processing unit, a sheet conveyance unit, and a control unit. The first and the second sheet discharge unit are configured to be able to discharge a sheet to an outside. The sheet conveyance unit includes a sheet conveyance path arranged between the first sheet discharge unit and the second sheet discharge unit. The control unit controls the sheet conveyance unit to convey the sheet along the sheet conveyance path toward the first sheet discharge unit to a predetermined position at which the sheet is not discharged from the first sheet discharge unit to the outside, then convey the sheet along the sheet conveyance path in an opposite direction toward the second sheet discharge unit, and discharge the sheet from the second sheet discharge unit.

An intermediate unit includes a transportation path along which a medium, on which printing has been performed by a printing unit that performs printing on the medium by using liquid, is transported to a post processing unit that performs post processing on the medium. The transportation path is provided with a drying unit that accelerates the drying of the medium. The drying unit is driven according to the printing data.

A sheet processing apparatus arranged in a space between an image reading section for reading an image and an image formation section for forming an image on a sheet includes a carry-in path guiding a sheet from a carry-in entrance; a relay roller provided in the carry-in path to relay and transport the sheet; a first transport path positioned on a downstream side of the relay roller and having a carry-in roller to transport the sheet from the carry-in path to the first collection tray; and a second transport path branched from the carry-in path and having a branch roller to transport the transported sheet to the second collection tray. The relay roller shifts the sheet in a direction crossing the transport direction while a front end of the sheet enters the first transport path or the second transport path, and arrives at the carry-in roller or the branch roller.

A printer includes a housing, a cover, and a movable unit. The housing has a space and an opening. The space accommodates a transportation path section that is at least part of a transportation path for transporting a paper sheet. The opening allows the space to communicate with the outside of the housing. The cover is in any one of positions relative to the opening including a closed position where the cover covers the opening and an open position where the cover uncovers the opening. The movable unit has the transportation path section and is movable between a storage position where the transportation path section is stored in the space and a pulled-out position where the transportation path section is pulled out of the space. The movable unit in the pulled-out position is restrained from moving toward the storage position when the cover is in the open position.