Abstract: A sheet conveyance relay unit, including: a convergence unit, including: a convergence section to converge sheet conveyance paths of plural sheet receiving sections; and a first common sheet-conveyance section, which conveys the recording sheets from the convergence section to a sheet feeding outlet; a divergence unit, including: a second common sheet-conveyance section, which conveys the recording sheets conveyed from the convergence unit; plural sheet feed-out sections, which are combined to plural post-finishing apparatuses; and a divergence section, which sorts the recording sheets conveyed by the second common sheet-conveyance section, onto the plural sheet feed-out sections; and a control section which receives job information having been set, and selects an image forming apparatus to be used for a job among the image forming apparatuses and a post-finishing apparatus to be used for the job among the plural post-finishing apparatuses, whereby the control section conducts the job having been set.

Abstract: A sheet conveyance relay unit, including: a convergence unit, including: a convergence section, in which a plurality of sheet receiving sections are respectively connected to a plurality of image forming apparatuses, to receive recording sheets, wherein the convergence section makes the recording sheets, conveyed from the plurality of the sheet receiving sections, to merge into a single sheet conveyance path; and a first common sheet-conveyance section, which conveys the recording sheets from the convergence section to a sheet feeding outlet, and a divergence unit, including: a second common sheet-conveyance section, which conveys the recording sheets, conveyed from the convergence unit; a plurality of sheet feed-out sections, which are combined to a plurality of post-finishing apparatuses; and a divergence section, which sorts the recording sheets, conveyed by the second common sheet-conveyance section, onto the plurality of the sheet feed-out sections.

Abstract: A sheet-trimming apparatus having a blade-driving mechanism which presses a trimming blade against the sheet in a oblique direction to the sheet surface for trimming the sheet and a receiving-member driving mechanism which shifts a blade-receiving member receiving the trimming blade in the direction cross to the direction of the trimming blade.

Abstract: A sheet conveying mechanism, which conveys a sheet on which a toner image has been fixed at a heat-fixing process, includes conveying rollers each of which is a single roller having the same diameter throughout a width for passing the sheet and is disposed in a predetermined section for a cooling process after the heat-fixing process, and includes a sheet conveying guide provided on the predetermined section and having a sheet-passing surface made in the same shape throughout the width for passing the sheet.

Abstract: An image forming apparatus having therein an image forming apparatus body and at least one post-processing apparatus, wherein there is provided an intermediate conveyance unit which is connected with and located between the image forming apparatus body and the post-processing apparatus and which has a sheet feed-in section that feeds in sheets ejected from the image forming apparatus body one by one at the same speed as the sheet ejection linear speed of the image forming apparatus body, a sheet storing section that stores two or more sheets which are fed in by the sheet feed-in section and a sheet feed-out section that feeds out the two or more sheets stored in the sheet-storing section with the two or more sheets superposed on each other, at the same speed as the receiving linear speed of the post-processing apparatus.

Abstract: A sheet humidification apparatus performs a humidification process on a sheet conveyed from an image forming apparatus in which the sheet is fed from a sheet feeding tray one by one, a toner image is formed on the sheet and the formed toner image is fixed by heat on the sheet, so that the percentage of water content of the sheet does not exceed that of the sheet in the sheet feeding tray.

Abstract: A paper coloring apparatus includes a coating apparatus which coats colored water on both faces of a paper sheet where an image has been formed by an electrophotographic image forming apparatus.

Abstract: The invention is to provide a sheet accumulation apparatus enabling to uniformly load tabbed sheets into a train of sheets for load and store the sheets on a tray. The sheet accumulation apparatus has a sheet outlet for successively discharging the sheets, a tray means for loading to hold the sheets thereon, a sheet carrier means for discharging the sheets from the sheet outlet to the side of a downstream, a sheet front end regulating means for colliding the sheets sent by the sheet carrier means against the regulating means at the sheet front ends and regulating them, and a sheet rear regulating means disposed to the tray means for regulating the positions of the sheets from the sheet outlet at the sheet rear ends.

Abstract: Replacement time for the cutting board used in the sheet cutting apparatus is detected. A sheet cutting apparatus has a cutting blade to cut a set of sheets by moving in an oblique direction which includes first component of a perpendicular direction to a face of the set of sheets and as second component of a parallel direction to the face, a cutting board to receive the cutting blade, a movable unit to move the cutting board to a face of the cutting blade, and an end detector to detect a movable end of the cutting board.

Abstract: A sheet humidifying device includes: a humidifier having a pair of humidifying rollers which form a nip by being in contact with each other and humidify a sheet that passes through the nip; and a water supply tray which stores water to be supplied to the humidifier, having a wall forming a chamber that stores the water, and a water outlet causing the water to overflow from the chamber, which is formed on the wall.

Abstract: A sheet moisturizing device having a moisturizing section that moisturizes a sheet and a guide which guides the sheet that has been moisturized by the moisturizing section, the guide includes a first guide member made of resin having a plurality of ribs, arranged immediately downstream of the moisturizing section in a sheet conveyance direction, which guides the sheet in a vertical direction.

Abstract: A sheet moisturizing apparatus, including a vertical conveyance route in which a sheet is guided upward or downward and paired moisturizing units which are mounted symmetrically to sandwich the vertical conveyance route.

Abstract: An image forming system includes: a first sheet stacking device including a rack, provided downstream of an image forming apparatus in a conveyance direction of a recording sheet and connected with the image forming apparatus, for stacking the recording sheet delivered from the image forming apparatus; a second sheet stacking device, which is provided downstream of the first sheet stacking device and connected with the first sheet stacking device; and a controller for controlling the image forming apparatus and the first and second sheet stacking devices. At least one of the first and second sheet stacking devices has a job stop button for stopping a printing job, and when the job stop button is turned on while the printing job execution is in progress, the controller controls the sheet stacking device to stop a stack of a recording sheet to the rack.

Abstract: An image forming system includes: a first sheet stacking device including a rack, provided downstream of an image forming apparatus in a conveyance direction of a recording sheet and connected with the image forming apparatus, for stacking the recording sheet delivered from the image forming apparatus; a second sheet stacking device, which is provided downstream of the first sheet stacking device and connected with the first sheet stacking device; and a controller for controlling the image forming apparatus and the first and second sheet stacking devices. At least one of the first and second sheet stacking devices has a job stop button for stopping a printing job, and when the job stop button is turned on while the printing job execution is in progress, the controller controls the sheet stacking device to stop a stack of a recording sheet to the rack.

Abstract: A sheet processing apparatus which flattens a curled sheet includes: a water content control unit which controls a water content of a sheet to flatten the curled sheet; a decurling section which is provided downstream the water content control unit with respect to a conveyance direction of the sheet, and the decurling section bends the curled sheet to be flat by a bending force; and a conveyance route changing section which changes a conveyance route of the sheet to direct to the water content control unit or not.

Abstract: An image forming system includes: a first and second stacking sections arranged at a position different from each other for stacking a sheet with an image formed thereon by an image forming section; a first conveyance path and a second conveyance path longer than the first one for conveying the sheet to the first and second stacking sections, respectively through a common conveyance path, wherein an interval between sheets fed along the common conveyance path is smaller than the difference between the second and first conveyance paths; a switching section for switching a conveyance path of the sheet conveyed along the common conveyance path between the first and second conveyance paths; and a control device controls such that an (N+1)th sheet is stacked on the first stacking section after the N-th sheet has been stacked on the second stacking section.

Abstract: A post-processing apparatus including a conveyance unit containing a stacker for storing a plurality of sheets placed one on top of the other and a conveyance path having a curvature for ejecting a plurality of sheets placed one on top of the other in the stacker and a control section for controlling conveyance of sheets, wherein the control section controls aligning the plurality of sheets in the conveyance unit, feeding a plurality of sheets placed one on top of the other to a roller through the conveyance path having a curvature, driving the conveyance roller so as to feed the plurality of sheets, hitting the sheet ends against a stopper so as to align the sheet ends, further conveying the sheets with the ends aligned until a loop is formed on sheets, and punching the sheets using by a punching section subsequent to formation of the loop.

Abstract: A sheet cutting apparatus includes: a cutting blade for cutting a sheet; an inserting device for inserting the sheet into a cutting position to be cut by the cutting blade; a taking out device for taking out the sheet from the cutting position after the sheet has been cut by the cutting blade; and an airflow generating device provided downstream of the cutting position in a direction of taking out the sheet by the taking out device for supplying an airflow to the cutting position.

Abstract: A post-processing apparatus which has a trimming apparatus for trimming an edge of sheets to make booklets, wherein the trimming apparatus has an inserting means for insertion of sheets into trimming process section of the trimming apparatus, an edge sustaining member and an edge holding member for pinching the vicinity of the edge of the sheet during the trimming process and a shifting means to make the opening size variable for receiving sheets by changing the relative position between the edge holding member and the edge sustaining member and a controller for controlling the shifting means to change the opening size between the edge holding member and the edge sustaining member according to the number of the sheets to be trimmed.

Abstract: A sheet storing device that has a conveyance device that holds a folded sheet to convey and a sheet storing section on which a sheet falling after being released from holding is placed, and allows a position of holding lower end position of the aforesaid conveyance device to be variable, a post-processing apparatus equipped with the sheet storing device and an image forming system equipped with the aforesaid items.