A de-curling device de-curls a sheet and includes an endless belt, a de-curling roller, a nip width adjusting mechanism, and a belt tension adjusting mechanism. The endless belt is looped around a pair of supporting rollers. The de-curling roller is provided between the pair of supporting rollers and has a first outer circumferential surface pressed against a second outer circumferential surface of the endless belt to form a nip portion at which the endless belt curves along the first outer circumferential surface, the de-curling roller being configured to de-curl the sheet passing through the nip portion. The nip width adjusting mechanism adjusts the nip width by moving the de-curling roller in a direction intersecting the second outer circumferential surface of the endless belt. The belt tension adjusting mechanism adjusts the tension of the endless belt according to the nip width adjusted by the nip width adjusting mechanism.

An apparatus for controlling curl in sheets between two transports includes a curved baffle placed between the two transports. A thin layer of high velocity air is applied to the curved baffle. The high velocity air layer, which will have a tendency to follow the curved baffle (Coanda effect), will divert sheets (Bernoulli effect) towards the curved baffle. By positioning the curved baffle between the two transports and by applying a uniform air stream to it, a lower pressure area will be created. This will flatten the trajectory of the sheets and ensure acquisition by the downstream transport.

An apparatus for controlling curl in sheets between two transports includes a curved baffle placed between the two transports. A thin layer of high velocity air is applied to the curved baffle. The high velocity air layer, which will have a tendency to follow the curved baffle (Coanda effect), will divert sheets (Bernoulli effect) towards the curved baffle. By positioning the curved baffle between the two transports and by applying a uniform air stream to it, a lower pressure area will be created. This will flatten the trajectory of the sheets and ensure acquisition by the downstream transport.

A recording apparatus includes: an output tray into which the paper sheet on which recording has been performed is outputted, wherein the output tray has a ribincludes a pair of first ribs disposed at an upstream position, the pair of first ribs being elongated in an output direction and protruding, and a pair of second ribs disposed at a downstream position, the pair of second ribs being elongated in the output direction and protruding, the output tray has an upstanding end portion (edge receiving section) formed at a downstream end in the output direction, the second rib is formed to be continuous from the edge receiving section, and each of the pair of first ribs and the pair of second ribs are symmetrically arranged to a center (center line) in a width direction, which is perpendicular to the output direction of the paper sheet.

A recording apparatus includes: an output tray into which the paper sheet on which recording has been performed is outputted, wherein the output tray has a ribincludes a pair of first ribs disposed at an upstream position, the pair of first ribs being elongated in an output direction and protruding, and a pair of second ribs disposed at a downstream position, the pair of second ribs being elongated in the output direction and protruding, the output tray has an upstanding end portion (edge receiving section) formed at a downstream end in the output direction, the second rib is formed to be continuous from the edge receiving section, and each of the pair of first ribs and the pair of second ribs are symmetrically arranged to a center (center line) in a width direction, which is perpendicular to the output direction of the paper sheet.

A processing apparatus includes a processing section configured to perform processing to a medium, a discharge section configured to discharge the medium that has been transported from the processing section along a medium transport path, and a first contact section configured to come into contact with the medium that has passed through the processing section and being transported toward the discharge section in the medium transport path to press the medium from one side toward the other side. The first contact section is switched between a first position for pressing the medium and a second position that is closer to the one side than the first position.

An inkjet recording apparatus (1) includes an image forming section (40), a decurler (20), a changing section (50), a first calculating section (72), storage (60), a second calculating section (73), and a controller (75). The image forming section (40) ejects ink onto a sheet (S). The decurler (20) bends the sheet (S). The changing section (50) changes a bending amount of the sheet (S). The first calculating section (72) calculates an ink ejection rate () to the sheet (S) for each of areas of the sheet (S). The storage (60) stores therein first bending information (62) indicating a first target bending amount () of a specific area of the sheet (S) corresponding to the ink ejection rate () to the specific area. The second calculating section (73) calculates a second target bending amount of each of the areas. The controller (75) controls the changing section (50) based on the second target bending amounts.

An inkjet recording apparatus (1) includes an image forming section (40), a decurler (20), a changing section (50), a first calculating section (72), storage (60), a second calculating section (73), and a controller (75). The image forming section (40) ejects ink onto a sheet (S). The decurler (20) bends the sheet (S). The changing section (50) changes a bending amount of the sheet (S). The first calculating section (72) calculates an ink ejection rate () to the sheet (S) for each of areas of the sheet (S). The storage (60) stores therein first bending information (62) indicating a first target bending amount () of a specific area of the sheet (S) corresponding to the ink ejection rate () to the specific area. The second calculating section (73) calculates a second target bending amount of each of the areas. The controller (75) controls the changing section (50) based on the second target bending amounts.

A knockdown apparatus for a finisher includes a register tray, a paddle coupled to a rotatable shaft to compile a recording medium toward an end of the register tray, and a knockdown device, provided above the register tray, to rotate to apply a downward force to the recording medium while the recording medium is in the register tray to decrease a curl in the recording medium.

A knockdown apparatus for a finisher includes a register tray, a paddle coupled to a rotatable shaft to compile a recording medium toward an end of the register tray, and a knockdown device, provided above the register tray, to rotate to apply a downward force to the recording medium while the recording medium is in the register tray to decrease a curl in the recording medium.