A post-processing apparatus includes a paper alignment tray including a loading table on which a paper is to be loaded, and a side guide and an end guide to align a side in a width direction and an end in a longitudinal direction of the paper stack, respectively, a first binder including a binding unit to bind the paper stack on the paper alignment tray in a stapleless manner, the first binder displaceable to a binding location to bind the paper stack and to a separation location to separate the binding unit from the paper stack, and a controller to move the paper stack relative to the binding unit while displacing the first binder from the binding location to the separation location.

A recording medium processing apparatus includes first teeth that are used for binding processing of a recording medium bundle; second teeth that move toward the first teeth and press the recording medium bundle located between the first teeth and the second teeth; and a control unit that moves the second teeth toward the first teeth to press the second teeth against the first teeth in a state in which there is no recording medium bundle between the first teeth and the second teeth.

A post-processing apparatus includes a loading portion, a first binder, a first mover, a second binder, a second mover, and circuitry. A plurality of sheets are placed as a sheet bundle on the loading portion. The circuitry executes a control mode in which, before the sheet bundle as a target to be bound by one binder of the first binder and the second binder is placed on the loading portion and after the one binder starts moving from a corresponding reference position of a first reference position and a second reference position, the circuitry causes the other binder of the first binder and the second binder to perform binding instead of the one binder. The circuitry executes the control mode, without returning the one binder to the corresponding reference position, in a state in which the one binder and the other binder do not contact each other.

A post-processing unit includes a stapler, a driving section, and a controller. The stapler is moved in a Y direction and executes a stapling process on a paper sheet. The driving section moves the stapler in the Y direction. The controller controls an operation of the stapler and an operation of the driving section. The controller executes first control to supply a set current or a set voltage to the driving section, second control to supply, to the driving section, the same supply current as the set current or the same supply voltage as the set voltage, and third control to stop the supply of the supply current or the supply voltage. When the stapler executes the stapling process a plurality of times, the controller repeatedly executes the second control and the third control and causes the stapler to execute the stapling process during the execution of the second control.

A movable-member supporter includes: a first support member that includes a first support plate, a first guide unit provided at the first support plate, and a first connection section, the first guide unit guiding movement of a movable member and having one end that extends to one side surface of the first support plate, the first connection section being provided at the one side surface of the first support plate; and a second support member that includes a second support plate, a second guide unit provided at the second support plate, and a second connection section, the second guide unit guiding movement of the movable member and having one end that extends to one side surface of the second support plate, the second connection section being provided at the one side surface of the second support plate and being connected with the first connection section of the first support member.

A stapling device of a paper finishing device of one embodiment of the present disclosure includes a stapler including an entrance into which one side of paper is inserted, a moving part including a stapler moving bracket on which the stapler is seated and a moving roller installed on the stapler moving bracket, a driving part which moves the stapler moving bracket, a base frame on which the stapler moving bracket and the driving part are installed, and which includes a horizontal guide surface extending along the one side of the paper, a first corner stapling guide surface spaced apart from the horizontal guide surface, and a first inclined guide surface which diagonally connects the horizontal guide surface and the first corner stapling guide surface, and a position guide part which is installed on the base frame and includes a second corner stapling guide surface and a second inclined guide surface which diagonally connects the horizontal guide surface and the second corner stapling guide surface and is inclined to be opposite to the first inclined guide surface.

There is provided a binding processing device including:

a first pressing member including a convex portion formed by a curved surface with a curvature and protruding toward a sheet bundle; and

a second pressing member including a concave portion formed by a curved surface with a curvature and configured to be combined with the convex portion through the sheet bundle, the second pressing member configured to press the sheet bundle sandwiched between the first and second pressing members, wherein

in a state where the convex portion of the first pressing member and the concave portion of the second pressing member are combined with each other, a gap is formed between the convex portion and the concave portion in a cross section of the first and second pressing members along a pressing direction, and

the gap has a volume larger than a volume of the sandwiched sheet bundle.

A binding member is provided and includes: upper teeth having a tooth form configured to form a convex-concave portion on a recording material bundle; and lower teeth having a tooth form configured to form the convex-concave portion on the recording material bundle, and paired with the upper teeth. At least one of the upper teeth and the lower teeth includes: a first tooth row having a first tooth form having a first shape suitable for binding a first binding number of sheets; and a second tooth row having a second tooth form having a second shape suitable for binding a second binding number of sheets which is smaller than the first binding number of sheets.

A post-processing apparatus which can respectively balance convenience of user using a manual stapling and convenience of user using an online stapling is provided. The finisher includes a stapler for performing predetermined post-processing on a sheet received and a control unit. The finisher also includes a stapler moving motor which moves the stapler to a position where first processing or second processing is performed. In the first processing, the predetermined post-processing is performed on a sheet which is conveyed from an image forming apparatus. In the second processing, the predetermined post-processing is performed on a sheet which is manually inserted.

It is an object to provide a sheet conveying apparatus excellent in productivity, and a sheet conveying apparatus is provided with a sheet conveying section for conveying a sheet in a predetermined conveyance direction, a placement portion to place sheets conveyed by the sheet conveying section, a contact portion for coming into contact with an upstream side end portion in the conveyance direction of placed sheets placed in the placement portion, a sheet discharge section for shifting the contact portion to the downstream side in the conveyance direction and thereby discharging the placed sheets from the placement portion, and a sheet conveyance guide portion for supporting a front end of a next sheet conveyed to the placement portion by the sheet conveying section on the upstream side of the contact portion in the conveyance direction, where the sheet conveyance guide portion is provided with an inclined face for supporting the front end of the next sheet discharged to the placement portion.