A sheet processing system includes a creasing device, a binding device provided downstream of the creasing device in sheet conveying direction, and a controller. The creasing device performs creasing processing to crease a plurality of sheets. The binding device binds a sheet bundle to be folded. The sheet bundle to be folded includes the plurality of sheets creased by the creasing device. The controller controls the creasing device. In a case where a binding position of the sheet bundle is different from a creasing position of each sheet, the controller controls the creasing device to perform creasing processing such that the creasing position of an inner sheet of the sheet bundle to be folded is shifted toward the binding position with respect to the creasing position of an outer sheet of the sheet bundle to be folded.

According to an embodiment, a sheet folding apparatus comprises a first roller, a second roller configured to be energized to the first roller, form a nip section together with the first roller, fold a sheet in half together with the first roller through the nip section and convey the sheet folded in half together with the first roller and a pressing force adjusting mechanism configured to be capable of increasing and decreasing a pressing force generated at the nip section. The pressing force adjusting mechanism causes a pressing force in a state of being conveying the sheet folded in half to be lower than that in a state of being folding the sheet in half.

A post processing apparatus includes: a reader that reads paper on which an image is formed by an image forming apparatus to acquire a read image; a post processor that performs post processing on the paper; and a hardware processor that detects a position of an edge of the paper and a position of the image from the read image acquired by the reader, and controls a post processing position in the post processor on the basis of the position of the edge of the paper and the position of the image detected.

An image processing device includes: a fold unit that folds an adjustment sheet, in which an adjustment pattern is formed, over the adjustment pattern based on a predetermined reference fold position; an image reader that reads an image of the adjustment pattern of the adjustment sheet with the adjustment sheet folded by the fold unit unfolded; a position identifying unit that, based on a fold line which appears in the image of the adjustment pattern read by the image reader, identifies a position of the fold line; and a fold position adjusting unit that adjusts a fold position of the fold unit based on a difference between the position of the fold line identified by the position identifying unit and the reference fold position.

A printing apparatus capable of producing a product having the optimum image layout dependent on a discharge destination even when saddle-stitching is canceled due to input of image data for sheets in excess of a limit of a saddle-stitchable number of sheets. The number of output sheets per one copy is calculated based on image data. When the number of output sheets per one copy exceeds a saddle-stitchable number of sheets, it is selected whether to perform the center folding processing on the sheets on which images are printed without performing the saddle stitching processing thereon or to perform neither the saddle stitching processing nor the center folding processing on the sheets on which images are printed.

A sheet processing device that bonds sheets to one another and then folds a resultant sheet bundle. The sheet processing device includes a stacker section that sequentially stores sheets moved thereto, an adhesive-binding unit that applies an adhesive onto sheets sequentially stored in the stacker section one by one in a sheet moving direction to bond the sheets to one another, a moving member that moves the sheets to an application position of the adhesive-binding unit, and a folding processing section that folds a sheet bundle formed by the bonded sheets at a predetermined folding position. When the number of sheets to be bonded by the adhesive-binding unit applying the adhesive onto the sheets exceeds a predetermined number, the adhesive is applied at two positions separated from each other across the folding position.

A printing system comprises: a printing unit configured to print an image on a sheet; and a control unit configured to control to perform creasing at a first pressure at a portion, corresponding to an edge of a spine cover, of the sheet on which the printing unit has printed the image, and perform creasing at a second pressure different from the first pressure at a portion of the sheet that corresponds to a hinge.

A method for generating a folding instruction for folding a stack of sheets into a document includes the steps of, for each sheet of the stack of sheets, receiving a folding action on the sheet defined by a fold type and an orientation relative to an observer, the fold type selected out of a mountain fold right, a mountain fold left, a mountain fold bottom, a mountain fold top, a valley fold right, a valley fold left, a valley fold bottom and a valley fold top; generating a function which has the folding action and the sheet as input and an ordered list of new sheets with an orientation relative to the observer of each new sheet of the list of new sheets as output; repeatedly applying the previous steps to each sheet of the at least one list of new sheets until the sheets in the last applied previous steps form the document; and generating a folding instruction including a concatenation of the at least one generated function on the stack of sheets, the folding instruction intended to be transmitted to a folding device for folding the stack of sheets into the document. A folding device and a document processing system for applying the method are also disclosed.

A sheet folding apparatus for folding a sheet is provided with a hold member that holds a transported sheet in a substantially cylindrical shape, a shift member that presses the outer circumferential surface of the sheet of the substantially cylindrical shape held by the hold member to make a substantially flat shape, and a discharge section that further presses the sheet made the substantially flat shape by the shift member, while discharging in a direction crossing a transport direction. By this means, it is possible to provide a relatively compact sheet folding apparatus.

A pressure-printed material preparing apparatus includes an attachment unit that attaches, powder which exhibits adhesiveness when pressure is applied, to a surface to be bonded of a recording medium; a fixation unit that applies pressure to the recording medium to which the powder is attached to fix the powder to the recording medium as an adhesive layer; a folding unit that folds the recording medium of which the adhesive layer is formed on the surface to be bonded, such that two portions of the surface to be bonded are opposed to each other; and an application unit that applies pressure to the recording medium in which the surfaces to be bonded are opposed to each other, to thereby bond the adhesive layer on one surface and the adhesive layer on the other surface.