Abstract: Sheet processing apparatus including a process tray for stacking sheets received from an image forming apparatus, a jogger for jogging the sheet stacked on the process tray at one of two jogging positions, a discharge unit for discharging the sheet stacked on the process tray, and a discharge tray for stacking the sheets discharged by the discharge unit. The sheet processing apparatus includes a stapler for stapling the sheets stacked on the process tray, and a controller for controlling the stapler to staple the sheets at a stapling position corresponding to the jogging position by the jogger.

Abstract: When sheets with images formed thereon from an image forming apparatus and a special sheet or sheets such as cover sheet(s) are arranged in alignment into a bundle of sheets, conveyance of the special sheet(s) from the stacking unit is started prior to conveyance of the sheets from the image forming apparatus, and the special sheet(s) is(are) temporarily halted on a conveyance path at a location intermediate between the stacking unit and a receiving unit, whereby no complicated operation by an operator is required and the productivity can be improved.

Abstract: Conveyance of a sheet is controlled based on a detected skew amount of a conveyed sheet and a result of determination on whether an operation mode set through an operation console is a punching mode or not, thus protecting a user from spending extra time and efforts and extra cost in the event that a sheet skews.

Abstract: When sheets with images formed thereon from an image forming apparatus and a special sheet such as a cover sheet are arranged in alignment into a bundle of sheets, conveyance of the special sheet from the stacking unit is started prior to conveyance of the sheets from the image forming apparatus, and the special sheet is temporarily halted on a conveyance path at a location intermediate between the stacking unit and a receiving unit, whereby no complicated operation by an operator is required and the productivity can be improved. Further, the special sheet will be switched (i.e. reversed) when it is conveyed to the receiving unit.

Abstract: In case of enabling to output a sheaf of sheets composed of a specific sheet such as a cover and image-formed sheets, it causes to prevent a user's erroneous operation, improve user's operability and productivity, and obtain a satisfactory output result without enlarging and complicating an entire apparatus. In this result, page order and image direction of the plural sheets are conformed to others, and a binding position is provided at the left of the sheets from the viewpoint of the image-formed face.

Abstract: Even if a user sets an erroneous setting to a sheet, in order to provide an image formation system which can recycle sheets and improve operability without executing incorrect processing to the sheet, a reference value, which is referred in confirming an abnormal state of the sheet to be conveyed, before a generation of sheet size information is made to differ from the reference value after the generation of the sheet size information on the basis of a sheet detected result. In accordance with the sheet size information to be confirmed and the sheet size information acquired according to an instruction from an operator, processing corresponding to the instruction from the operator to the sheet is invalidated. An image formation operation is interrupted in accordance with the sheet size information to be confirmed and the sheet size information acquired according to the instruction from the operator.

Abstract: In an image formation system which includes a finisher with an inserter having a tray for stacking a specific sheet on which an image such as a cover image was formed, and an image formation apparatus, a series of originals composed of plural pages is read from its first page in order, the image based on the read original is formed on the sheet, the sheet stacked on the inserter is fed, the sheet from the inserter is reversed to set its image-formed face facedown, and the sheet from a printer unit is reversed to set its image-formed face facedown. The sheet, the image-formed face of which was reversed facedown, is discharged from the printer unit to the finisher and, on the finisher, the sheet from the inserter is stacked as keeping its image-formed face facedown and the sheet from the printer unit is stacked as keeping its image-formed face facedown.

Abstract: In an image forming apparatus that folds plural sheets in folio, an image forming unit forms images an a recording area on the sheets and forms a margin between the recording area and another forming area. A projecting unit folds the sheets upon nipping the sheets between two rollers by projecting between the two rollers so as to nip a part of the sheets where the margin is formed at first. The projecting unit projects to the margin of prescribed width of images formed at an image forming apparatus body to fold the plural sheets.

Abstract: A sheet processing apparatus for stapling multiple sheets with a stapler and delivering the sheets in folio, includes a staple hitting device, a stapler having an anvil opposed to the staple hitting device with respect to a sheet path and a shifting device for shifting the sheet so as to escape a staple from a groove on the anvil after the sheet is stapled by drive of the staple hitting device.

Abstract: A sheet processing apparatus, such as a finisher, to be used in an image forming device, has a sheet conveying device for allowing conveyance and temporary stopping conveyance to place the sheet in a waiting state, a sheet-conveying-condition detector for detecting a conveying condition for each sheet, a first mode of conveying a sheet by driving the sheet conveying device without placing the sheet conveying device in a waiting state, a second mode of conveyance which places the sheet conveying device in the waiting state, thereafter releasing the waiting state of the sheet conveying device in accordance with conveyance of a succeeding sheet, and conveying preceding and succeeding sheets in a superposed state, and a third mode of conveyance, placing the sheet conveying device in the waiting state, thereafter releasing the waiting state of the sheet conveying device, and conveying the preceding sheet separately from the succeeding sheet.

Abstract: This invention relates to a sheet processing apparatus for stapling multiple sheets with a stapling means and delivering the sheets in folio, comprising two rollers for folding the sheets in folio and projecting means for projecting between the two rollers to fold the sheets in sandwiching the sheets between the two rollers. One roller of the two rollers, at least, is made movable, and a cam member is further provided capable of correcting a projecting position by the projecting means according to traveling of the roller.

Abstract: A sheet sorting apparatus includes a plurality of trays for accommodating sheets; a helical cam device, engageable with a cam follower for moving the plurality of trays; a cam driving device for driving the helical cam device; a sheet set processing device movable between processing position and a retracted position where the processing device doe snot interfere with the plurality of trays; a reversible driving device for advancing or retracting the sheet set processing device; and a controlling device for controlling the driving device; wherein a cam surface of the helical cam is constituted of substantially horizontal portions and slanted portions; and the cam driving device and the driving device are controlled by the controlling device, in such a manner that the sheet set processing device starts to enter a processing position when the cam follower shifts from the slanted portions to the horizontal portions, and the entering operation ends by the time the cam follower reaches the middle portion of the hor

Abstract: The present invention provides a sheet folding apparatus comprising a folding means for folding a sheet by feeding a folded portion of the sheet by a pair of rotary members, in which the folded portion of the sheet is passed through a nip between the pair of rotary members by plural times by rotating said pair of rotary members in normal and reverse directions alternately. It further comprises a switch-back control means for controlling so that a return speed of the sheet obtained by the pair of rotary members becomes slower than an advancing speed of the sheet.

Abstract: For reducing the curl of the sheets ejected from an electrophotographic printer to a sorter, which is so constructed as to increase the space between a tray currently subjected to sheet storage and an upper adjacent tray and to reduce the spaces of other trays, there is executed control, in response to the end or interruption of the printing operation of the printer, so as to increase the space of the trays not currently subjected to sheet storage operation and to decrease the space of the tray currently subjected to the sheet storage operation, thereby pressing the sheets present on the tray.

Abstract: It is an object of this invention to provide a stapling apparatus which binds sheets like a book by stapling the sheets at two points in a both sides copying mode or in a mode in which a cover is added to the sheets. This stapling apparatus includes a stapling unit for selectively performing stapling at one or a plurality of points of a plurality of sheets ejected from an image forming apparatus, and a control unit for controlling the stapling unit to perform stapling at a plurality of points of sheets ejected when the image forming apparatus is in a specific mode.

Abstract: A sheet post-processing apparatus includes a tray for accommodating discharged sheets; binding device for binding the sheets discharged to the tray; a stacker, juxtaposed with the tray, for accommodating a set of sheets on the tray; and a controller for discriminating whether binding mode or non-binding mode is selected, and for changing stacking way of the set of sheets on the stacker.