Ricoh Company, Ltd.

Kentaro Fukami

Hiroki Yoshida

Terumitsu Azuma

Shigefumi Soga

Takeshi Hirabayashi

Shinji Tanoue

Daishi Watanabe

Kazumasa Takeuchi

Toshikazu Satoh

A sheet processing apparatus includes a fixed tray and a movable tray. The fixed tray is fixed at its downstream portion in a sheet transport direction and includes a sheet loading surface. A downstream portion of the sheet loading surface of the fixed tray is positioned at a higher level than an upstream portion thereof. The movable tray is pivotally supported, at its upstream portion, by a pivot support provided on the fixed tray. An angle between a sheet loading surface of the movable tray and a horizontal direction is more gentle than an angle between the sheet loading surface of the fixed tray and the horizontal direction.

Sheet stacker and image forming apparatus

A paper processing apparatus includes: a discharging unit that discharges the paper onto a staple tray; a paper returning unit that reverses the paper discharged by the discharging unit and performs alignment in a conveying direction by abutting the paper against a rear end reference fence; a supporting unit that supports the discharging unit in a state capable of coming in contact with or separating from the paper; a contact and separation unit by which the discharging unit comes in contact with or separates from the paper; and a pressurizing unit that is moved by the contact and separation unit, does not load the discharging unit in a standby state where the discharging unit is held apart from the paper, and applies contact pressure in a state where the discharging unit is in contact with the paper.

Paper processing apparatus and image forming apparatus

A sheet processing apparatus includes: a staple tray on which sheets are stacked temporarily and stapled after being aligned together and from which the stapled sheets are discharged to a discharge tray; a discharger to discharge the sheets to the staple tray; a rear end reference against which rear ends of the sheets are abutted to be aligned together; a returner to return the sheets discharged by the discharger and to align the sheets together in a conveying direction based on the rear end reference fence; a lifter to lift and lower the returner with respect to a sheet; and a guide configured to guide the sheets toward the rear end reference fence when the sheets are returned and to be lifted and lowered in synchronization with the lifting and lowering by the lifter.

Sheet returning unit for post processing apparatus

A sheet post-processing device receives a sheet from an image forming apparatus conveys a plurality of the sheets to a staple tray to form a sheet pile, and staples the sheet pile with a stapler. The stapler is arranged along a first side of the staple tray in a sheet width direction and has an opening for taking in a second side of the sheet pile when stapling the sheet pile at a staple position. The stapler unit is arranged at a position that a central portion of the second side of the sheet pile is situated inside the opening, and the staple position is located downstream of an alignment surface of an aligning member in a sheet conveying direction that aligns ends of the sheets in the sheet pile.

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Aichi, Japan

Kentaro Fukami