A post-processing apparatus (1) includes a first conveyance path (41), a first processing part (55), a second conveyance path (95) and a merging conveyance path (97), and the first processing part (55) includes a conveying rollers pair (80) including a first roller (81) and a second roller (83) conveying the sheet along a first direction; a first folding rollers pair (84) including the first roller (81) and a third roller (85) forming a first nip, conveying the sheet along a second direction and performing a folding processing along a first fold line; a second folding rollers pair (86) including the third roller (85) and a fourth roller (87) forming a second nip, conveying the sheet along a third direction and performing a folding processing along a second fold line; a first folding guide (89) movable to the first nip; and a second folding guide (91) movable to the second nip.

An image forming system includes an image forming apparatus including a fixing unit, a folding processing portion, and a pressure-bonding portion. A first recording material having a first basis weight is fixed at a first temperature by the fixing unit and then is pressure-bonded by the pressure-bonding portion after a lapse of a first period. A second recording material having a second basis weight is fixed at a second temperature by the fixing unit and then is pressure-bonded by the pressure-bonding portion after a lapse of a second period. The second basis weight is larger than the first basis weight. The second temperature is higher than the first temperature. The second period is longer than the first period.

An enclosing device includes an envelope conveyance path, an envelope loader, an envelope-position restrictor, and an envelope-position adjuster. The envelope conveyance path conveys an envelope to an enclosing position at which an enclosure is enclosed into the envelope. The envelope loader loads the envelope to be supplied to the envelope conveyance path. The envelope-position restrictor restricts a loaded position of the envelope in the envelope loader. The envelope-position adjuster adjusts a position of the envelope with respect to a conveyance direction of the envelope while maintaining a state in which the envelope-position restrictor restricts the loaded position of the envelope.

An apparatus includes: a unit that provides an instruction on creasing and folding positions on paper set such that the distance between fold crease and fold line positions is meaningful; a unit that acquires a read image by reading paper that has been subjected to creasing and folding processes in accordance with the creasing and folding positions in an open state; a unit that analyzes the read image to detect two streaks corresponding to the fold crease and the fold line from the read image, and that specifies the position of one of the two streaks as the fold crease position and the position of the other as the fold line position on the basis of the creasing and folding positions; and a unit that outputs correction information about at least one of the creasing and folding positions such that the fold crease and fold line positions match each other.

An image forming apparatus includes, an image forming portion configured to form a toner image on a sheet using printing toner and apply powder adhesive on the sheet, a fixing portion configured to heat the toner image formed on the sheet and the powder adhesive applied on the sheet by the image forming portion and fix the toner image and the powder adhesive to the sheet, and a bonding portion configured to bond the sheet with the powder adhesive by reheating the sheet having been heated by the fixing portion. The bonding portion is arranged above the image forming portion.

A sheet processing apparatus includes an entry portion, a sheet conveyance path extending from the entry portion, a skew correction roller pair that contacts a leading edge of a sheet conveyed in a predetermined direction from the entry portion to correct skew of the sheet, and a receiving path. The skew correction roller pair conveys the skew-corrected sheet in a direction opposite the predetermined direction. The receiving path branches from the sheet conveyance path from the entry portion to the skew correction roller pair to receive the sheet conveyed in the direction opposite the predetermined direction.

A sheet processing apparatus includes conveyers to convey a sheet. The conveyers include a registration conveyer which a plurality of sheets is to sequentially contact and is configured to bend a preceding sheet contacting the registration conveyer toward a direction in which the preceding sheet does not obstruct an entry of a following sheet to the registration conveyer when the conveyers overlay and convey the plurality of sheets after the plurality of sheets sequentially contacts the registration conveyer.

A sheet processing apparatus includes a rotatable pressing member, a guide, and a contact member. The rotatable pressing member includes a pressing portion that is disposed in a predetermined range in a rotation direction of the pressing member to press a folded portion of a sheet. The guide is disposed opposite the pressing member. The contact member contacts the guide and is rotatably disposed at at least one end of the pressing member in an axial direction of the pressing member.

The present invention provides a post process control apparatus including a post processing unit configured to perform post processing on a printed sheet printed in accordance with a job, and a method for controlling the same, where the post process control apparatus and the method of controlling the same obtain a number of sheets in one copy of printed sheets instructed by the job, control the post processing unit to, if the obtained number of sheets in one copy is singular, execute the post processing in one batch on printed sheets corresponding to a plurality of copies, and to control the post processing unit to, if the obtained number of sheets in one copy is plural, execute the post processing individually by printed sheets corresponding to one copy.

A sheet processing apparatus includes a transport path for transporting a sheet in a predetermined transport direction; a folding unit disposed along the transport path to perform folding processing on a sheet transported through the transport path; and a downstream-side unit disposed on a downstream side in the transport direction along the transport path to perform processing on a sheet transported from the folding unit. The folding unit includes a space section disposed at a lower side of the transport path for forming a cylindrical shape on a sheet; a transport roller disposed in the transport path to transport a sheet to the space section; and folding rollers to form a fold at a predetermined position on a sheet in which the cylindrical shape is formed. The space section is provided in a range of overlapping the downstream-side unit in a height direction orthogonal to the transport direction.