A binding member includes: an upper tooth that has an upper tooth form for forming unevenness in a bundle of recording materials; and a lower tooth that has a lower tooth form for forming unevenness in the bundle of recording materials and that forms a pair with the upper tooth. At least one of the upper tooth form and the lower tooth form is formed such that, in a sectional shape, a groove is formed in a trough portion of a concave portion of a tooth form and a length of an inclined portion which comes into contact with the bundle of recording materials is made small compared to a case where the inclined portion of the tooth form has reached a bottom of the trough portion.

A binding member includes: an upper tooth that has an upper tooth form for forming unevenness in a bundle of recording materials; and a lower tooth that has a lower tooth form for forming unevenness in the bundle of recording materials and that forms a pair with the upper tooth. At least one of the upper tooth form and the lower tooth form is formed such that, in a sectional shape, a groove is formed in a trough portion of a concave portion of a tooth form and a length of an inclined portion which comes into contact with the bundle of recording materials is made small compared to a case where the inclined portion of the tooth form has reached a bottom of the trough portion.

A media folding device includes a stacking portion on which media transported from an introduction path are placed; a folding roller pair that folds the media at a folding position after the media have been stacked in the stacking portion; and a bend forming mechanism that includes a first abutting portion configured to abut against a front end of the media, which are stacked in the stacking portion, in a transport direction, and a second abutting portion that is configured to abut against a rear end of the media, which are stacked in the stacking portion, in the transport direction, and that causes the folding position of the media to be nipped by the folding roller pair the folding roller pair by shortening the relative distance between the first abutting portion and the second abutting portion to bend the media toward the folding roller pair.

A media folding device includes a stacking portion on which media transported from an introduction path are placed; a folding roller pair that folds the media at a folding position after the media have been stacked in the stacking portion; and a bend forming mechanism that includes a first abutting portion configured to abut against a front end of the media, which are stacked in the stacking portion, in a transport direction, and a second abutting portion that is configured to abut against a rear end of the media, which are stacked in the stacking portion, in the transport direction, and that causes the folding position of the media to be nipped by the folding roller pair the folding roller pair by shortening the relative distance between the first abutting portion and the second abutting portion to bend the media toward the folding roller pair.

A post-processing device includes a discharge port through which a sheet is discharged, an intermediate tray, a discharge tray and an air sending part. The air sending part includes an upper air sending member, an upper switching member, a lower air sending member, a lower switching member and a controller. The upper air sending member generates a downward air flow from above the discharge port. The upper switching member is distributable the air flow generated by the upper air sending member to above the intermediate tray and to above the discharge tray. The lower air sending member generates an upward air flow from below the discharge port. The lower switching member is distributable the air flow generated by the lower air sending member to below the intermediate tray and to above the discharge tray. The controller controls the upper switching member and the lower switching member.

A post-processing device includes a discharge port through which a sheet is discharged, an intermediate tray, a discharge tray and an air sending part. The air sending part includes an upper air sending member, an upper switching member, a lower air sending member, a lower switching member and a controller. The upper air sending member generates a downward air flow from above the discharge port. The upper switching member is distributable the air flow generated by the upper air sending member to above the intermediate tray and to above the discharge tray. The lower air sending member generates an upward air flow from below the discharge port. The lower switching member is distributable the air flow generated by the lower air sending member to below the intermediate tray and to above the discharge tray. The controller controls the upper switching member and the lower switching member.

According to an example, an apparatus may include an automatic document feeder, printing components, an externally accessible embedded finishing mechanism, an illumination source to direct attention to the embedded finishing mechanism, and a controller. The controller may determine whether a certain condition has been met pertaining to media sheets fed into the automatic document feeder or printed by the printing components, and in response to a determination that the certain condition has been met, may activate the illumination source.

According to an example, an apparatus may include an automatic document feeder, printing components, an externally accessible embedded finishing mechanism, an illumination source to direct attention to the embedded finishing mechanism, and a controller. The controller may determine whether a certain condition has been met pertaining to media sheets fed into the automatic document feeder or printed by the printing components, and in response to a determination that the certain condition has been met, may activate the illumination source.

This system is provided with: a conveying device 1 that conveys paper P along a conveying path F; a sheet paper supply device 2, paper-folding device, or cutter connected to an upstream end of the conveying path; a gathering device 3 disposed midway through the conveying path; a saddle stitch device 7 connected to a downstream end of the conveying path; and a management unit 13 that collectively controls the conveying device, the sheet paper supply device, the paper-folding device, the cutter, the gathering device, and the saddle stitch device. The gathering device can switch operation between a non-operating mode, a first operating mode for operating as a primary gathering device, and a second operating mode for operating as a paper insertion device.

This system is provided with: a conveying device 1 that conveys paper P along a conveying path F; a sheet paper supply device 2, paper-folding device, or cutter connected to an upstream end of the conveying path; a gathering device 3 disposed midway through the conveying path; a saddle stitch device 7 connected to a downstream end of the conveying path; and a management unit 13 that collectively controls the conveying device, the sheet paper supply device, the paper-folding device, the cutter, the gathering device, and the saddle stitch device. The gathering device can switch operation between a non-operating mode, a first operating mode for operating as a primary gathering device, and a second operating mode for operating as a paper insertion device.