Abstract: Provided is a sheet folding device including a folding roll that has a convex portion spirally provided on an outer periphery surface and is rotatably provided, and performs a folding process while pressing the convex portion on a sheet, and a phase change unit that makes a phase of the folding roll when the sheet on which the folding process is performed by the folding roll passes through the folding roll again different from a phase when the sheet passes through the folding roll for the last time.

Abstract: The recording material post-processing device includes a post-processing mechanism, and additional post-processing mechanism and a transport control unit. The post-processing mechanism performs a post-process for a recording material transported from one branched transport path of an image forming device. The additional post-processing mechanism performs an additional post-process other than the post-process performed by the post-processing mechanism for the recording material transported from the other branched transport path of the image forming device. The transport control unit controls transport of the recording material such that the post-process using the post-processing mechanism is performed after the post-process using the additional post-processing mechanism is performed.

Abstract: Provided is a post-processing device including a stacking section that aligns and stacks recording materials which are sequentially transported, a saddle stitching section that binds plural sheets of recording materials in central portions of the recording materials, a center folding section that folds the plural sheets of recording materials into two in the central portions, a pressing section that presses a booklet in a thickness direction of the booklet, and a discharge section that discharges the booklet, which is pressed by the pressing section, with a folded portion of the booklet being a leading portion, wherein the booklet is held and stopped in a state of being nipped by the discharge section, and transport is initiated after the lapse of a predetermined stop time so that the booklet is discharged.

Abstract: Provided is a sheet folding device including a folding roll that is rotatably provided and includes a large diameter portion of which a diameter is greater than a diameter of another portion, and performs a folding process while pressing the large diameter portion onto a sheet, and a contact portion displacement unit that makes a position of a contact portion that is a portion coming into contact with the large diameter portion in the sheet when the sheet on which the folding process has been performed by the folding roll passes through the folding roll again different from a position of the contact portion when the sheet passes through the folding roll for the last time.

Abstract: Provided is a pair of sheet transport rolls including a first roll that has a first convex portion spirally provided on an outer peripheral surface, and a second roll that is provided along the first roll and has a second convex portion that is spirally provided in a position facing the first convex portion of the first roll on the outer peripheral surface, wherein the first roll and the second roll are rotated, and a sheet is transported while being sandwiched between the first convex portion of the first roll and the second convex portion of the second roll.

Abstract: Provided is a sheet folding device including a folding roll that has a convex portion spirally provided on an outer periphery surface and is rotatably provided, and performs a folding process while pressing the convex portion on a sheet, and a phase change unit that makes a phase of the folding roll when the sheet on which the folding process is performed by the folding roll passes through the folding roll again different from a phase when the sheet passes through the folding roll for the last time.

Abstract: The post-processing device includes: a binding unit that forms a cut in a sheet stack and cuts a part of the sheet stack into a predetermined shape to form a tongue portion in the sheet stack, the tongue portion having a part where one end part of the tongue portion is not separated from the sheet stack, and binds the sheet stack by bending the tongue portion and inserting the other end part of the tongue portion into the cut; and a sheet stack transport unit that transports the sheet stack in an orientation such that the one end part of the tongue portion in the sheet stack bound by the binding unit is on a downstream side of the other end part of the tongue portion in the sheet stack transport direction.

Abstract: A post-processing device includes a sheet-bundle forming unit that stacks plural sheets and forms a sheet bundle; a binding unit that forms a cut in the sheet bundle, forms a tongue in the sheet bundle by cutting part of the sheet bundle into a predetermined shape so that a first end remains uncut and continues to the sheet bundle, and binds the sheet bundle by folding the tongue and inserting a second end of the tongue into the cut; a transport unit that transports the sheet bundle; a stack unit that stacks the sheet bundle; and a position change unit that changes a position of binding processing performed on the sheet bundle so that the tongue formed in the sheet bundle stacked on the stack unit does not contact another tongue formed in another sheet bundle stacked on the stack unit.

Abstract: The recording material post-processing device includes a post-processing mechanism, and additional post-processing mechanism and a transport control unit. The post-processing mechanism performs a post-process for a recording material transported from one branched transport path of an image forming device. The additional post-processing mechanism performs an additional post-process other than the post-process performed by the post-processing mechanism for the recording material transported from the other branched transport path of the image forming device. The transport control unit controls transport of the recording material such that the post-process using the post-processing mechanism is performed after the post-process using the additional post-processing mechanism is performed.

Abstract: A post-processing device includes a transport section transporting a sheet; a load section loading the sheet thereon; a first aligner moving the sheet while being in contact with a surface thereof to align the sheet; a second aligner moving the sheet while being in contact with an edge thereof to align the sheet; an alignment controller controlling the aligners to align the sheet based on a first mode in which they simultaneously align the sheet, and based on a second mode, for every predetermined number of sheets, in which one aligner aligns the sheet after the other aligner completes the alignment process; and a transport controller causing the transport section to transport the sheet at a reduced speed for every predetermined number of sheets so that the sheet reaches the load section after completion of the second-mode alignment process performed after a previous sheet is loaded on the load section.

Abstract: The post-processing device includes: a binding unit that forms a cut in a sheet stack and cuts a part of the sheet stack into a predetermined shape to form a tongue portion in the sheet stack, the tongue portion having a part where one end part of the tongue portion is not separated from the sheet stack, and binds the sheet stack by bending the tongue portion and inserting the other end part of the tongue portion into the cut; and a sheet stack transport unit that transports the sheet stack in an orientation such that the one end part of the tongue portion in the sheet stack bound by the binding unit is on a downstream side of the other end part of the tongue portion in the sheet stack transport direction.

Abstract: The recording material post-processing device includes a post-processing mechanism, and additional post-processing mechanism and a transport control unit. The post-processing mechanism performs a post-process for a recording material transported from one branched transport path of an image forming device. The additional post-processing mechanism performs an additional post-process other than the post-process performed by the post-processing mechanism for the recording material transported from the other branched transport path of the image forming device. The transport control unit controls transport of the recording material such that the post-process using the post-processing mechanism is performed after the post-process using the additional post-processing mechanism is performed.

Abstract: The post-processing device includes: a binding unit that forms a cut in a sheet stack and cuts a part of the sheet stack into a predetermined shape to form a tongue portion in the sheet stack, the tongue portion having a part where one end part of the tongue portion is not separated from the sheet stack, and binds the sheet stack by bending the tongue portion and inserting the other end part of the tongue portion into the cut; and a sheet stack transport unit that transports the sheet stack in an orientation such that the one end part of the tongue portion in the sheet stack bound by the binding unit is on a downstream side of the other end part of the tongue portion in the sheet stack transport direction.

Abstract: A post-processing device includes a transport section transporting a sheet transported at a predetermined speed from an upstream side toward a downstream side; a load section on which the transported sheet is loaded; an aligner aligning the loaded sheet; an alignment controller performing control such that the aligner performs the alignment process on the sheet transported from the transport section to the load section for every predetermined number of sheets; and a transport controller controlling the transport section by causing the transport section to transport the sheet at a reduced speed for the every predetermined number of sheets so that the sheet transported at the reduced speed reaches the load section after the aligner completes the sheet alignment process that is performed on a previous sheet transported immediately prior to the sheet after the previous sheet is loaded on the load section.

Abstract: A post-processing device includes a sheet-bundle forming unit that stacks plural sheets and forms a sheet bundle; a binding unit that forms a cut in the sheet bundle, forms a tongue in the sheet bundle by cutting part of the sheet bundle into a predetermined shape so that a first end remains uncut and continues to the sheet bundle, and binds the sheet bundle by folding the tongue and inserting a second end of the tongue into the cut; a transport unit that transports the sheet bundle; a stack unit that stacks the sheet bundle; and a position change unit that changes a position of binding processing performed on the sheet bundle so that the tongue formed in the sheet bundle stacked on the stack unit does not contact another tongue formed in another sheet bundle stacked on the stack unit.

Abstract: A post-processing device includes a sheet-bundle forming unit that stacks plural sheets and forms a sheet bundle; a binding unit that forms a cut and a tongue in the sheet bundle and binds the sheet bundle by inserting the tongue into the cut; a transport unit that transports the sheet bundle; and a stack unit that stacks the sheet bundle. The binding unit includes first and second binding mechanisms that bind first and second sheet bundles at first and second sides in a direction intersecting with a transport direction of the sheet bundle, respectively. The post-processing device further includes an arrangement mechanism that arranges the first and second sheet bundles at different positions on the stack unit in the direction intersecting with the transport direction so that a tongue formed in one of the first and second sheet bundles is shifted from the other sheet bundle.

Abstract: A post-processing device includes a transport section transporting a sheet; a load section loading the sheet thereon; a first aligner moving the sheet while being in contact with a surface thereof to align the sheet; a second aligner moving the sheet while being in contact with an edge thereof to align the sheet; an alignment controller controlling the aligners to align the sheet based on a first mode in which they simultaneously align the sheet, and based on a second mode, for every predetermined number of sheets, in which one aligner aligns the sheet after the other aligner completes the alignment process; and a transport controller causing the transport section to transport the sheet at a reduced speed for every predetermined number of sheets so that the sheet reaches the load section after completion of the second-mode alignment process performed after a previous sheet is loaded on the load section.

Abstract: A post-processing device includes a transport section transporting a sheet transported at a predetermined speed from an upstream side toward a downstream side; a load section on which the transported sheet is loaded; an aligner aligning the loaded sheet; an alignment controller performing control such that the aligner performs the alignment process on the sheet transported from the transport section to the load section for every predetermined number of sheets; and a transport controller controlling the transport section by causing the transport section to transport the sheet at a reduced speed for the every predetermined number of sheets so that the sheet transported at the reduced speed reaches the load section after the aligner completes the sheet alignment process that is performed on a previous sheet transported immediately prior to the sheet after the previous sheet is loaded on the load section.

Abstract: The post-processing device includes: a binding unit that forms a cut in a sheet stack and cuts a part of the sheet stack into a predetermined shape to form a tongue portion in the sheet stack, the tongue portion having a part where one end part of the tongue portion is not separated from the sheet stack, and binds the sheet stack by bending the tongue portion and inserting the other end part of the tongue portion into the cut; and a sheet stack transport unit that transports the sheet stack in an orientation such that the one end part of the tongue portion in the sheet stack bound by the binding unit is on a downstream side of the other end part of the tongue portion in the sheet stack transport direction.

Abstract: A post-processing device include a conveyed medium stacking portion, a medium bundle stapling member, a medium bundle stacking portion and a medium bundle stacking control unit. A plurality of recording mediums, on which images are recorded, are conveyed and stacked into the conveyed medium stacking portion. The medium bundle stapling member staples a medium bundle, which is a bundle of the plurality of recording mediums stacked on the conveyed medium stacking portion, with staples. The stapled medium bundle is conveyed and stacked into the medium bundle stacking portion. The medium bundle stacking control unit stacks a second medium bundle on a first medium bundle under the condition that a second stacking stapling position deviates from a first stacking stapling position in a width direction by a distance not less than a staple width.