A binding processing device includes a first pressing member including: a first convex portion; a first concave portion; and a first connection portion which is provided between the first convex portion and the first concave portion; and a second pressing member including: a second convex portion; a second concave portion; and a second connection portion which is provided between the second convex portion and the second concave portion. In a state in which the first convex portion of the first pressing member and the second concave portion of the second pressing member come in contact with each other at the first connection portion and the second connection portion, the first connection portion contacts with the second connection portion and a gap is formed between the first convex portion and the second concave portion along a pressing direction of the first and second pressing members. In a state in which a sheet bundle is sandwiched between the first pressing member and the second pressing member, an increased section having an increased thickness of each sheet of the sheet bundle is formed in the gap. The increased section is pressed by the first convex portion and the second concave portion.

A post-processing apparatus of an embodiment discharges a sheet determined that writing of information to a wireless tag provided in the sheet is successful to a first paper discharge portion, and discharges a sheet determined that writing of information to a wireless tag provided in the sheet fails to a second paper discharge portion different from the first paper discharge portion.

A sheet binding device includes a first tooth-shaped member that has plural arranged teeth, and a second tooth-shaped member that has plural arranged teeth, bites the first tooth-shaped member to clamp and bind sheets in cooperation with the first tooth-shaped member, and is tilted relative to the first tooth-shaped member from a beginning of biting to a completion of biting.

A post-processing apparatus comprises a first processing tray on which fed paper is placed; a paper binding section configured to bind a plurality of sheets of paper stacked on the first processing tray into one bundle; a second processing tray which a plurality of paper bundles bound on the first processing tray are sequentially conveyed to and placed on; a paper bundle gluing section configured to coat glue at a given position of the top surface of a first paper bundle placed on the second processing tray before a second paper bundle is placed on the first paper bundle; a pressing section configured to press and bind the first paper bundle with the second paper bundle between which glue is coated; and a control section configured to control the timing for conveying the second paper bundle onto the first paper bundle after the glue is coated.

A sheet characteristic detection system that detects a sheet characteristic, includes: a sheet characteristic detection device that includes a plurality of media sensors corresponding to a plurality of different sheet characteristics; and a hardware processor that is capable of changing a type of the sheet characteristic to be detected by the plurality of media sensors.

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 post-processing apparatus of an embodiment discharges a sheet determined that writing of information to a wireless tag provided in the sheet is successful to a first paper discharge portion, and discharges a sheet determined that writing of information to a wireless tag provided in the sheet fails to a second paper discharge portion different from the first paper discharge portion.

In accordance with an embodiment, a sheet post processing apparatus comprises a processing tray, a gluing section and a control section. Sheets are placed one by one in the processing tray. The gluing section enables glue to be adhered to the glue binding margin part of the sheets already placed in the processing tray. The control section includes a glue supply mode for supplying glue parts in such a manner that a glue part, which is different from a waiting glue part waiting for a next gluing when the previous glue binding is ended, is supplied to a glue adhering section of a first sheet for gluing with a second sheet through the gluing section.

A post-processing apparatus of an embodiment discharges a sheet determined that writing of information to a wireless tag provided in the sheet is successful to a first paper discharge portion, and discharges a sheet determined that writing of information to a wireless tag provided in the sheet fails to a second paper discharge portion different from the first paper discharge portion.

A sheet post-processing apparatus includes: a sheet stack tray; a rear-end-position regulating member, against which a rear end of the sheet on the tray is butted to align a position of the sheet in a sheet conveying direction to the stack tray, the rear end of the sheet being a rear end in the conveying direction; and a roller member that comes in contact with an upper surface of the sheet conveyed to an upper side of the tray, before the sheet is stacked on a stacking surface on the tray, and conveys the sheet stacked on the stacking surface toward the rear-end-position regulating member, wherein a rotation speed before stacking is set to be smaller than a rotation speed after stacking, and the rotation speed of before stacking is greater than zero.