Abstract: Sheet pressing means (59) is provided that assists the formation of a bend in a sheet (S) and that guides the bend in the sheet (S) into the nip portion between a second roller (54) and a third roller (55). The sheet pressing means (59) is formed with a cylindrical sheet member (591) and a bar-shaped member (592) that is inserted into the cylindrical sheet member (591). The top portion of the sheet member (591) is attached to a base member (593), and thus the bar-shaped member (592) is supported by the sheet member (591) such that the longitudinal direction of the bar-shaped member (592) is held substantially in a horizontal state.

Abstract: Sheet pressing means (59) is provided that assists the formation of a bend in a sheet (S) and that freely swings to guide the bend into the nip portion of a second folding roller pair (a second roller (54) and a third roller (55)). The pivot point (594) of the sheet pressing mean (59) is arranged on the side of the nip portion of a first folding roller pair with respect to a common tangent (L1) of the first folding roller pair (a first roller (53) and the second roller (54)) on the downstream side in a sheet transport direction, and is arranged to be lower than a line (L3) that is parallel to a common tangent (L2) of the second folding roller pair on the upstream side in the sheet transport direction and that passes through the center (O) of the first roller (53). Thus, it is possible to reliably perform processing for folding the sheet in a predetermined position regardless of the material quality, the thickness and the like of the sheet.

Abstract: A sheet processing apparatus having: a first roller pair for nipping a sheet so as to subject the sheet to first folding; a stopper member for stopping advance of the sheet after the first folding; a guide for flexing the sheet whose advance is stopped by the stopper member; a second roller pair for nipping the sheet flexed by the guide so as to subject the sheet to second folding; and a switch member for leading the sheet to be subjected to the second folding onto a first path having the stopper member mounted thereon, and leading the sheet to be subjected only to the first folding onto a second path connected to an outside of the apparatus, wherein the guide comes into stronger contact with the sheet to be subjected to the first folding and the second folding than the sheet to be subjected only to the first folding.

Abstract: An object of the invention is to provide a sheet alignment apparatus that is excellent in alignment properties in the conveyance direction and operates stably without being affected by various conditions, and a sheet post-processing apparatus having therein the sheet alignment apparatus. Alignment members are constructed so that alignment surfaces of the alignment members arranged to be in a form where a distance between the alignment surfaces grows greater toward the downstream side, or the direction of movement of the alignment member is made to be an oblique direction pointing to the stopper.

Abstract: Sheet pressing means (59) is provided that assists the formation of a bend in a sheet (S) and that freely swings to guide the bend into the nip portion of a second folding roller pair (a second roller (54) and a third roller (55)). The pivot point (594) of the sheet pressing mean (59) is arranged on the side of the nip portion of a first folding roller pair with respect to a common tangent (L1) of the first folding roller pair (a first roller (53) and the second roller (54)) on the downstream side in a sheet transport direction, and is arranged to be lower than a line (L3) that is parallel to a common tangent (L2) of the second folding roller pair on the upstream side in the sheet transport direction and that passes through the center (O) of the first roller (53). Thus, it is possible to reliably perform processing for folding the sheet in a predetermined position regardless of the material quality, the thickness and the like of the sheet.

Abstract: Sheet pressing means (59) is provided that assists the formation of a bend in a sheet (S) and that guides the bend in the sheet (S) into the nip portion between a second roller (54) and a third roller (55). The sheet pressing means (59) is formed with a cylindrical sheet member (591) and a bar-shaped member (592) that is inserted into the cylindrical sheet member (591). The top portion of the sheet member (591) is attached to a base member (593), and thus the bar-shaped member (592) is supported by the sheet member (591) such that the longitudinal direction of the bar-shaped member (592) is held substantially in a horizontal state.

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: There is described a paper sheet post processing apparatus that includes a paper sheet stacking apparatus in which the paper sheet stacking operation can be smoothly and stably conducted during a high-speed post processing of paper sheets. The paper sheet stacking apparatus includes: a paper sheet stacking tray that is inclined with respect to a horizontal line; an ejecting member to press-push a lower end portion of the paper sheets stacked on the paper sheet stacking tray, so as to eject the paper sheets outside the paper sheet stacking apparatus; and a protrusion member to push up substantially a center portion of the paper sheets stacked on the paper sheet stacking tray. The protrusion member is formed as a separate member being independent of the ejecting member. Further, the height of the protrusion member is lower than that of the ejecting member.

Abstract: A post-processing apparatus having therein a stacker that stocks sheets temporarily and an ejection device that ejects a plurality of sheets stacked on the stacker from the stacker wherein the ejection device has an ejection claw that pushes up the plural sheets and a moving device that moves the ejection claw along the stacker, the ejection claw has a contact surface with which the aforesaid plural sheets are brought into contact when the plural sheets are pushed up, and the contact surface has plural protrusions protruding toward the plural sheets.

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: There is described a paper sheet post processing apparatus that includes a paper sheet stacking apparatus in which the paper sheet stacking operation can be smoothly and stably conducted during a high-speed post processing of paper sheets. The paper sheet stacking apparatus includes: a paper sheet stacking tray that is inclined with respect to a horizontal line; an ejecting member to press-push a lower end portion of the paper sheets stacked on the paper sheet stacking tray, so as to eject the paper sheets outside the paper sheet stacking apparatus; and a protrusion member to push up substantially a center portion of the paper sheets stacked on the paper sheet stacking tray. The protrusion member is formed as a separate member being independent of the ejecting member. Further, the height of the protrusion member is lower than that of the ejecting member.

Abstract: A postprocessing apparatus stops and positions an image recording sheet delivered from an image forming apparatus at a predetermined position, punches the sheet with a punching unit, and thereafter folds the sheet with a folding unit.

Abstract: A sheet post-processing apparatus to eject a recorded sheet, conveyed from an image forming apparatus, into a designated mailing bin, including an intermediate stacking section, arranged inside a housing of the post-processing apparatus, having a stacker to stack the plural recorded sheets conveyed from the image forming apparatus, an alignment section to align the stacked recorded sheets, and a binding device to bind the stacked recorded sheets, a mail storage section, arranged inside the housing of the post-processing apparatus, having at least a mailing bin to receive the sheet whose ejecting destination has been designated, through the intermediate stacking section, a main tray section, arranged outside the housing of the post-processing apparatus, to receive the sheet whose ejecting destination has not been designated, through the intermediate stacking section; and an exclusive door having a key locking mechanism, provided at a position on the housing corresponding to the mail storage section.

Abstract: A sheet alignment apparatus includes: an aligning element for pushing a sheet supported on a sheet supporting face by moving in a direction perpendicular to a conveyance direction of the sheet, thereby aligning a position of the sheet; and a driving source for reciprocating the aligning element. An aligning face of the aligning element is arranged to be inclined with respect to the sheet supporting face.

Abstract: An object of the invention is to provide a sheet alignment apparatus that is excellent in alignment properties in the conveyance direction and operates stably without being affected by various conditions, and a sheet post-processing apparatus having therein the sheet alignment apparatus. Alignment members are constructed so that alignment surfaces of the alignment members arranged to be in a form where a distance between the alignment surfaces grows greater toward the downstream side, or the direction of movement of the alignment member is made to be an oblique direction pointing to the stopper.

Abstract: This invention relates to a sheet postprocessing apparatus which includes a first crease forming unit for forming a first crease on a sheet in its width direction, a second crease forming unit for forming a second crease parallel to the first crease, a first abutting member against which the leading end of a sheet introduced into the first crease forming unit abuts to position the sheet, a second abutting member against which the first crease abuts to position the sheet, a first driving mechanism for driving the first abutting member, a second driving mechanism for driving the second abutting member, and a control device for controlling the first crease forming unit, first driving mechanism, second crease forming unit, and second driving mechanism, and makes one folding process selected from a center folding process, inward three-fold process, and Z-fold process executable in the same sheet convey path.

Abstract: The invention concerns a hole-punching processor that forms punched-holes, for binding sheets into a file, on the sheets, which are ejected after images are formed on them from an image forming apparatus such as, for example, a copying machine, a printer, a facsimile machine or a compound machine thereof. The hole-punching processor forms a punched-hole on a sheet residing in a conveying path for conveying the sheet through the hole-punching processor. The hole-punching processor includes a hole-punching device being movable in a direction perpendicular to a conveyance direction of the sheet and a sheet-edge detector to detect a side-edge of the sheet in a direction parallel to the conveyance direction of the sheet. The hole-punching device moves with the sheet-edge detector to a center of the sheet, based on positional information of the side-edge detected by the sheet-edge detector, to punch a hole in the sheet.

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 apparatus, having a sheet ejection section, provided in an upper portion of the image forming apparatus, for ejecting a recording sheet onto an upper surface portion of the image forming apparatus; a sheet post-processing apparatus for receiving the recording sheet, ejected from the sheet ejection section, so as to perform a post-processing operation upon the recording sheet; and a coupler for coupling the sheet post-processing apparatus with the image forming apparatus so that at least a part of the post-processing apparatus is located on the upper surface portion of the image forming apparatus.