Abstract: A sheet skew-correcting device includes a sheet-conveying rotation body for conveying a sheet, a skew-correcting member that contacts an end of the sheet conveyed by the sheet-conveying rotation body for correcting skew of the sheet, and a driving unit for moving the skew-correcting member. The skew-correcting member moved in a sheet-conveying direction by the driving unit contacts the end of the sheet conveyed in the sheet-conveying direction by the sheet-conveying rotation body, so as to correct the skew of the sheet.

Abstract: A sheet processing apparatus includes an aligning member configured to align an end of a bundle of sheets including a folded sheet by engaging with the edge of the bundle of sheets, and a sheet processing unit configured to process the bundle of sheets having the end aligned by the aligning member. The end of the bundle of sheets engaged with the aligning member is opposite to a folded portion of the folded sheet.

Abstract: Provided is a sheet folding apparatus for folding a sheet stack, including a sheet stack support member for supporting a sheet stack by being abutted against a lower edge of the sheet stack, an abutting member for folding the sheet stack by making the sheet stack supported by the sheet stack support member abutted against a leading edge of the abutting member, and paired folding rollers for sandwiching the sheet stack folded by the abutting member to fold the sheet stack at a fold position, in which a position where the sheet stack is abutted against the leading edge of the abutting member with respect to the fold position is varied based on sheet stack information.

Abstract: Provided is a post-processing apparatus which sequentially receives sheets one by one from an image forming apparatus to execute a post-processing on the sheets, including: a first transport device which receives the sheets delivered from the image forming apparatus and transports the sheets; a sheet overlap device which stays the sheets transported by the first transport device and causes another sheet transported sequentially by the first transport device to overlap at least one stayed sheet; a second transport device which transports a plurality of sheets overlapping each other by the sheet overlap device; a plurality of stacking devices capable of stacking a plurality of sheets transported by the second transport device; and a controller which changes control of sheet overlapping caused by the sheet overlap device depending on which stacking device selected from among the plurality of stacking devices the sheets are to be transported to.

Abstract: A sheet processor includes a holding unit for holding a folded batch of sheets, a pressing member for pressing against a folded portion of the batch of sheets, a nipping member for nipping portions of the batch adjacent to the folded portion so as to nip the batch of sheets from opposite directions, and a casing for supporting the pressing member and the nipping member.

Abstract: A sheet-bundle spine treatment apparatus includes upper and lower press-rollers for adjusting a crease shape by moving while pinching front and rear surfaces of a spine of a folded sheet-bundle therebetween and a flattening roller for flattening a back of the sheet-bundle by moving while pushing the back of the spine of the sheet-bundle. At least one of the upper and lower press-rollers and the flattening roller is selected so as to allow it to operate.

Abstract: Provided is a sheet folding apparatus for folding a sheet stack, including a sheet stack support member for supporting a sheet stack by being abutted against a lower edge of the sheet stack, an abutting member for folding the sheet stack by making the sheet stack supported by the sheet stack support member abutted against a leading edge of the abutting member, and paired folding rollers for sandwiching the sheet stack folded by the abutting member to fold the sheet stack at a fold position, in which a position where the sheet stack is abutted against the leading edge of the abutting member with respect to the fold position is varied based on sheet stack information.

Abstract: A sheet processing device includes a pair of gripping rollers which can grip and convey a sheet bundle in a booklet-like form, a pressing roller which presses and flattens the folded back portion of the sheet bundle gripped by the gripping rollers, and a control unit which performs rotation control on the pair of gripping rollers. The control unit controls the gripping rollers so as to stop when the folded back portion of the sheet bundle protrudes from the rollers by a predetermined amount. The pressing roller flattens down the protruding folded back portion when the gripping rollers are stopped by the control unit and is in the state of gripping the sheet bundle.

Abstract: Provided is a post-processing apparatus which sequentially receives sheets one by one from an image forming apparatus to execute a post-processing on the sheets, including: a first transport device which receives the sheets delivered from the image forming apparatus and transports the sheets; a sheet overlap device which stays the sheets transported by the first transport device and causes another sheet transported sequentially by the first transport device to overlap at least one stayed sheet; a second transport device which transports a plurality of sheets overlapping each other by the sheet overlap device; a plurality of stacking devices capable of stacking a plurality of sheets transported by the second transport device; and a controller which changes control of sheet overlapping caused by the sheet overlap device depending on which stacking device selected from among the plurality of stacking devices the sheets are to be transported to.

Abstract: Provided is a sheet folding apparatus for folding a sheet stack, including a sheet stack support member for supporting a sheet stack by being abutted against a lower edge of the sheet stack, an abutting member for folding the sheet stack by making the sheet stack supported by the sheet stack support member abutted against a leading edge of the abutting member, and paired folding rollers for sandwiching the sheet stack folded by the abutting member to fold the sheet stack at a fold position, in which a position where the sheet stack is abutted against the leading edge of the abutting member with respect to the fold position is varied based on sheet stack information.

Abstract: Provided is a post-processing apparatus which sequentially receives sheets one by one from an image forming apparatus to execute a post-processing on the sheets, including: a first transport device which receives the sheets delivered from the image forming apparatus and transports the sheets; a sheet overlap device which stays the sheets transported by the first transport device and causes another sheet transported sequentially by the first transport device to overlap at least one stayed sheet; a second transport device which transports a plurality of sheets overlapping each other by the sheet overlap device; a plurality of stacking devices capable of stacking a plurality of sheets transported by the second transport device; and a controller which changes control of sheet overlapping caused by the sheet overlap device depending on which stacking device selected from among the plurality of stacking devices the sheets are to be transported to.

Abstract: A sheet processor includes a holding unit for holding a folded batch of sheets, a pressing member for pressing against a folded portion of the batch of sheets, a nipping member for nipping portions of the batch adjacent to the folded portion so as to nip the batch of sheets from opposite directions, and a casing for supporting the pressing member and the nipping member.

Abstract: A sheet processor includes a holding unit for holding a folded batch of sheets, a pressing member for pressing against a folded portion of the batch of sheets, a nipping member for nipping portions of the batch adjacent to the folded portion so as to nip the batch of sheets from opposite directions, and a casing for supporting the pressing member and the nipping member.

Abstract: A sheet bundle spine folded portion flattening apparatus is provided with a conveying portion which conveys the folded sheet bundle with the spine folded portion of the folded sheet bundle at a head, a sheet bundle moving device for moving it in a direction along the spine folded portion of the sheet bundle, and a pressing device for pressing the spine folded portion of the sheet bundle being moved by the sheet bundle moving device, and is adapted to press and flatten the spine folded portion of the sheet bundle being moved by the sheet bundle moving device, by the pressing device and therefore, can flatten the spine folded portion almost without stopping the movement of the sheet bundle, as compared with the conventional art, and the sheet bundle treating efficiency is enhanced.

Abstract: A sheet processing apparatus includes an aligning member configured to align an end of a bundle of sheets including a folded sheet by engaging with the edge of the bundle of sheets, and a sheet processing unit configured to process the bundle of sheets having the end aligned by the aligning member. The end of the bundle of sheets engaged with the aligning member is opposite to a folded portion of the folded sheet.

Abstract: A sheet skew-correcting device includes a sheet-conveying rotation body for conveying a sheet, a skew-correcting member that contacts an end of the sheet conveyed by the sheet-conveying rotation body for correcting skew of the sheet, and a driving unit for moving the skew-correcting member. The skew-correcting member moved in a sheet-conveying direction by the driving unit contacts the end of the sheet conveyed in the sheet-conveying direction by the sheet-conveying rotation body, so as to correct the skew of the sheet.

Abstract: A folded back portion flattening device includes a gripper and a presser. The gripper grips a sheet bundle formed into a booklet with the folded back portion protruding from the gripper. The presser presses the folded back portion of the sheet bundle gripped by the gripper, and includes pressing rollers which have pressing rotational surfaces and which are disposed along the folded back portion. The pressing rotational surfaces press the folded back portion. The pressing rollers are disposed so that the rotational pressing surface of a second pressing roller, which presses the folded back portion after the rotational pressing surface of a first pressing roller has pressed the folded back portion, presses deeper into an edge of the sheet bundle than the rotational pressing surface of the first pressing roller. At least one of the gripper and presser is movable in a direction parallel to the folded back portion.

Abstract: An inspection device having a reading portion for reading an image on a sheet having an image formed thereon, a storage portion for storing therein image data read by the reading portion, and a selecting portion for selecting one of a first mode for storing the image data read by the reading portion in the storage portion, and a second mode for judging whether the image data read by the reading portion is similar to the image data stored in the storage portion.

Abstract: The front ends of the plurality of sheets stacked on the processing tray are abutted against the stopper and are reliably aligned. The stack of a predetermined number of sheets to be accommodated in the processing tray is aligned and stacked all at once in the processing tray while being simultaneously gripped by the gripping portion 5a of the movement gripper in a plurality of sheet groups. The temporal margin is thereby produced compared to when aligning and stacking are performed one sheet at a time, and thus is effective in realizing the high speed process at low cost and maintaining high productivity.

Abstract: A folded back portion flattening device includes a gripper and a presser. The gripper grips a sheet bundle formed into a booklet with the folded back portion protruding from the gripper. The presser presses the folded back portion of the sheet bundle gripped by the gripper, and includes pressing rollers which have pressing rotational surfaces and which are disposed along the folded back portion. The pressing rotational surfaces press the folded back portion. The pressing rollers are disposed so that the rotational pressing surface of a second pressing roller, which presses the folded back portion after the rotational pressing surface of a first pressing roller has pressed the folded back portion, presses deeper into an edge of the sheet bundle than the rotational pressing surface of the first pressing roller. At least one of the gripper and presser is movable in a direction parallel to the folded back portion.