Ricoh Company, Ltd.

Kiichiro Goto

Takahiro Watanabe

Tomohiro Furuhashi

Shuuya Nagasako

Kyosuke Nakada

Masahiro Tamura

Kazuya Yamamoto

Yuji Suzuki

Akira Kunieda

Junya Suzuki

Kazunori Konno

Keisuke Sugiyama

Tomomichi Hoshino

Yasuo Niikura

Takamasa Matsumoto

Youhei Niitsuma

Yuusuke Shibasaki

Tomohiro Yoshizaki

Ryo Takahashi

Hidetoshi Kojima

Kei Sasaki

Takashi Fukumoto

Kohjiroh Haga

Satoru Takano

Yuuta Mori

Shintaro Matsumoto

Michitaka Suzuki

Kazuhiko Kitano

Yasushi Tsuruoka

Yuuji Suzuki

According to an embodiment, there is provided a sheet processing apparatus includes a stacking unit that stacks a sheet conveyed thereto; a first alignment unit that aligns the sheet or a bundle of sheets stacked in the stacking unit in a sheet conveying direction; a second alignment unit that aligns the sheet or the bundle of sheets stacked in the stacking unit in a direction orthogonal to the sheet conveying direction; a pressing unit that presses the bundle of sheets at an end portion thereof on a predetermined one side; and a control unit that causes at least one of the first and second alignment units to execute an alignment operation during a press operation of the sheet or the bundle of sheets performed by the pressing unit.

Sheet processing apparatus and image forming system

A sheet discharging device includes a shift trayon which a sheet Pis stacked, a discharging rollerthat discharges a sheet Ponto the shift tray, a blowing devicethat sends air to a lower surface of the sheet Pdischarged by the discharging roller, a blocking memberthat blocks air sent to the lower surface of the sheet Pfrom a blowing port-of the blowing device, and a control unit that controls the blocking amount of the blocking member. The blocking amount is determined based upon sheet information including sheet-type information, sheet-size information, and sheet-thickness information, for example.

Sheet discharging device, image forming system, and sheet discharging method

A sheet ejecting device includes: a sheet ejecting unit configured to eject a sheet; a stacking unit on which the sheet that is ejected by the ejecting unit is stacked; an aligning unit configured to align the sheet in a direction orthogonal to the direction in which the sheet is ejected; and a blowing unit configured to be provided to the aligning unit and blow a wind toward the ejected sheet.

Sheet ejecting device, image forming system, and sheet ejecting method

A recording medium discharging device includes a discharging unit configured to discharge a recording medium from a discharge port; a tray unit on which the recording medium discharged from the discharging unit is stacked; and an air blower configured to blow air in a direction substantially parallel to a direction in which the recording medium is discharged.

Recording medium discharging device

A sheet discharging device includes a shift trayon which a sheet P1 is stacked, a discharging rollerthat discharges a sheet P2 onto the shift tray, a blowing devicethat sends air to a lower surface of the sheet P2 discharged by the discharging roller, a blocking memberthat blocks air sent to the lower surface of the sheet P2 from a blowing port-of the blowing device, and a control unit that controls the blocking amount of the blocking member. The blocking amount is determined based upon sheet information including sheet-type information, sheet-size information, and sheet-thickness information, for example.

A sheet folding apparatus includes: a folded part forming unit that forms a folded part on the sheet by nipping a curved portion formed on a part of the sheet between an upstream first sheet conveying unit and a downstream second sheet conveying unit by holding a part of the sheet by the first sheet conveying unit and applying conveying force to the sheet to reverse the sheet upstream by the second sheet conveying unit; and a sheet leading end detection unit disposed downstream of or at almost same position as the second sheet conveying unit. The sheet is conveyed based on a detection timing of the sheet leading end detection unit such that the leading end of the sheet protrudes by a predetermined protrusion amount from the second sheet conveying unit immediately before applying conveying force to the sheet to reverse the sheet.

Sheet folding apparatus, image forming apparatus, and image forming system

A sheet folding apparatus includes: a first sheet conveying unit; a second sheet conveying unit that is disposed downstream of the first sheet conveying unit; a folded part forming unit that forms a folded part on a sheet by nipping a turned-back portion formed on a part of the sheet between the first sheet conveying unit and the second sheet conveying unit; a second conveying path that bifurcates from the first conveying path and in which a sheet with the folded part is conveyed; and a pushing member that is movable between a pushing position at which the pushing member pushes the turned-back portion toward the folded part forming unit and a retracted position. The pushing member also serves as a changing unit that changes a direction of a leading end of the sheet that is conveyed in the first conveying path into a direction toward a second conveying path.

A sheet processing apparatus includes: a first pair of conveying members that convey a sheet; a second pair of conveying members that receive the sheet conveyed by the first pair of the conveying members and further conveys the sheet to a subsequent stage; and a third pair of conveying members that fold the sheet by rotating the second pair of the conveying members in a reverse direction while the sheet is held by the first pair of the conveying members and the second pair of the conveying members. One of the conveying members of the second pair serves as one of the conveying members of the third pair.

Sheet processing apparatus, image forming system, and sheet folding method

A sheet stacking apparatus including: a discharge unit configured to discharge a sheet through a discharge port; a stack unit configured to stack the discharged sheet thereon; and a plurality of blowing units configured to supply air to a discharge side of the discharge unit while the sheet is discharged, wherein the blowing units are disposed, below the discharge port, aligned with a direction perpendicular to a sheet discharge direction.

Sheet stacking apparatus, image forming system and sheet stacking method

A sheet processing apparatus includes: a folding processing unit that folds a sheet by reversely rotating a second conveying member in a condition in which the sheet is held by a first and the second conveying members; a calculating unit that calculates an amount of deflection of the sheet held by the first and second conveying members from timings at which the sheet is detected by first and second detecting units disposed upstream of the first conveying member and downstream of the second conveying member and a distance between disposed positions of the first and second detecting units; and a control unit that sets, from the calculated amount of deflection of the sheet, an amount of conveyance for the first conveying member in a direction opposite to a sheet conveying direction in a condition in which the sheet is held by the first and second conveying members.

A sheet handling apparatus includes a sheet folding unit configured to perform folding on a sheet; and a sheet stacking unit configured to stack the folded sheet on a sheet stacking surface having an inclined surface and a horizontal surface in order from upstream to downstream in a sheet conveying direction. A downstream end of the inclined surface is higher than an upstream end of the inclined surface with respect to a horizontal plane. The sheet handling apparatus also includes a discharging unit configured to discharge the folded sheet to the sheet stacking unit; a sheet conveying unit configured to convey the discharged sheet from the inclined surface to the horizontal surface; and a conveying force applying unit configured to apply a conveying force to the sheet in contact with an upper surface of the sheet from above the inclined surface.

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Kanagawa, Japan

Kiichiro Goto