A post-processing apparatus has an input terminal into which a first activation signal output from an image forming apparatus is input. A user switch is operated by a user. A generation circuitry is provided inside the post-processing apparatus. The generation circuitry, by turning on the user switch, generates a second activation signal corresponding to the first activation signal. A power source circuitry is activated in response to the first activation signal input into the input terminal. A post-processing mechanism performs a post-processing process on a sheet using an electric power supplied from the power source circuitry. When the image forming apparatus is in a state of being unable to output the first activation signal, in response to the second activation signal generated by the generation circuitry, the power source circuitry is activated.

A post-processing apparatus has an input terminal into which a first activation signal output from an image forming apparatus is input. A user switch is operated by a user. A generation circuitry is provided inside the post-processing apparatus. The generation circuitry, by turning on the user switch, generates a second activation signal corresponding to the first activation signal. A power source circuitry is activated in response to the first activation signal input into the input terminal. A post-processing mechanism performs a post-processing process on a sheet using an electric power supplied from the power source circuitry. When the image forming apparatus is in a state of being unable to output the first activation signal, in response to the second activation signal generated by the generation circuitry, the power source circuitry is activated.

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 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 printing system is disclosed. The printing system includes a printing unit, a sheet processing unit, and a control unit. The sheet processing unit performs a designated sheet process for the printed sheet using a die that is manually selected by a user and attached to the sheet processing unit. When the die for performing the designated sheet process is not attached to the sheet processing unit, it is determined, before the printing unit starts printing the image on a first sheet on which the printing unit prints the image firstly among sheets on which the designated sheet process is to be performed, not to perform the designated sheet process for the sheets on which the designated sheet process is to be performed. The printing unit starts printing the image on the sheets on which the designated sheet process is to be performed after the determination.

A printing system is disclosed. The printing system includes a printing unit, a sheet processing unit, and a control unit. The sheet processing unit performs a designated sheet process for the printed sheet using a die that is manually selected by a user and attached to the sheet processing unit. When the die for performing the designated sheet process is not attached to the sheet processing unit, it is determined, before the printing unit starts printing the image on a first sheet on which the printing unit prints the image firstly among sheets on which the designated sheet process is to be performed, not to perform the designated sheet process for the sheets on which the designated sheet process is to be performed. The printing unit starts printing the image on the sheets on which the designated sheet process is to be performed after the determination.

A sheet transfer apparatus for transferring a sheet is provided with a back receiver section that rotates a sheet to transfer, and a support section that supports the back face of the back receiver section swingably. By this means, the back receiver section is capable of rotating smoothly.

A sheet transfer apparatus for transferring a sheet is provided with a back receiver section that rotates a sheet to transfer, and a support section that supports the back face of the back receiver section swingably. By this means, the back receiver section is capable of rotating smoothly.

Single perforating unit is enabled to perforate for file binders and to cut milling grooves, while with a simple structure file-binder storage and booklet-binding can be carried out reliably. Configurations include: a convey-in path for sequentially transferring sheets; a stacker for collating into bundles sheets from the convey-in path; and an adhesive-layer applicator for adding an adhesive layer to the spine-closure edge of sheet bundles from the stacker. A perforating unit is provided in along the convey-in path, and a control unit for controlling position and/or number of perforations made by the perforating unit is provided with (1) a first operation mode in which it effects the punching of a predetermined number of holes in the edge of sheets, and (2) a second operation mode in which it effects the formation of a predetermined number of crenulated grooves in the edge of sheets.

A sheet processing apparatus for processing a sheet includes a conveying path in which a sheet is conveyed; a setting portion including an opening formed in a cover, a setting face supporting a lower face of a sheet bundle inserted through the opening from an outside of the sheet processing apparatus, and a regulating face which regulates a position of the sheet bundle; a stack portion on which sheets are stacked; a binding unit which is configured to bind a sheet bundle set on a sheet setting area; and a punching unit being configured to be movable in the sheet width direction, the punching unit including a punching portion which forms a punch hole. In the sheet width direction, the sheet setting area is arranged as being overlapped with a moving area of an end of the one side of the punching unit in the sheet width direction.