Abstract: An image forming apparatus capable of forming a toner image on continuous paper, includes: a developing device that develops a latent image formed on an image carrier to form a toner image; a toner storage container that stores toner and is detachably attached to the image forming apparatus; and a plurality of toner storages, wherein the toner is supplied from the toner storage container to the developing device via the plurality of toner storages.

Abstract: An image forming apparatus includes: a main body that forms an image on a sheet; and a removable unit that is attachable and removable to and from the main body, wherein the removable unit includes a first unit attachable to an outside of the main body, and is packable separately from the main body in a state removed from the main body.

Abstract: A paper sheet stacking apparatus, includes: a first tray that stacks a paper sheet; a sheet discharger that discharges a paper sheet supplied from the outside of the apparatus to the first tray; a second tray that receives the paper sheet stacked on the first tray and discharges the received paper sheet to the outside of the apparatus; and a hardware processor that controls operation states of the first tray and the second tray, wherein the first tray and the second tray have: a first operation state in which the first tray is positioned at a paper sheet stacking position; a second operation state in which the paper sheet stacked on the first tray is deliverable to the second tray; and a third operation state in which the first tray that has delivered the paper sheet to the second tray is returned to the paper sheet stacking position.

Abstract: An image reading device having a mark formed on front and back of a sheet by an image forming device, and including a first scanner which reads the mark and a second scanner provided at a downstream side of the first scanner and which reads the mark, includes: a position adjusting unit configured to adjust front and back positions of the mark on the basis of a print position of the mark read by at least one of the first scanner and the second scanner; and a monitoring unit configured to monitor front and back misregistration of the mark on the basis of the front and back positions of the mark adjusted by the position adjusting unit.

Abstract: An image reading device having a mark formed on front and back of a sheet by an image forming device, and including a first scanner which reads the mark and a second scanner provided at a downstream side of the first scanner and which reads the mark, includes: a position adjusting unit configured to adjust front and back positions of the mark on the basis of a print position of the mark read by at least one of the first scanner and the second scanner; and a monitoring unit configured to monitor front and back misregistration of the mark on the basis of the front and back positions of the mark adjusted by the position adjusting unit.

Abstract: A sheet processing apparatus 3 includes a position aligning section (61A, 61B), a holding section 53, and a processing section (38, 55). The position aligning section (61A, 61B) abuts the inner side or a fold of a sheet bundle (S2), which is formed by collecting a plurality of folded sheets (S1), to align the position of the folds of line plurality of folded sheets (S1). The holding section (53) holds the sheet bundle (S2) in which the position of the folds of the plurality of sheets (S1) has been aligned by the position aligning section (61A, 61B). The processing section (38, 55) performs a predetermined process on the sheet bundle (S2) held by the holding section 53.

Abstract: A sheet processing apparatus 3 includes a position aligning section (61A, 61B), a holding section 53, and a processing section (38, 55). The position aligning section (61A, 61B) abuts the inner side or a fold of a sheet bundle (S2), which is formed by collecting a plurality of folded sheets (S1), to align the position of the folds of line plurality of folded sheets (S1). The holding section (53) holds the sheet bundle (S2) in which the position of the folds of the plurality of sheets (S1) has been aligned by the position aligning section (61A, 61B). The processing section (38, 55) performs a predetermined process on the sheet bundle (S2) held by the holding section 53.