Abstract: A sheet processing apparatus includes an endless belt configured to convey the sheet by coming in contact with an upper surface of the sheet stacked on the sheet stacking portion, a shaft extending in a direction orthogonal to the sheet conveying direction, and a supporting portion rotatably supporting the drive rotating member and supporting the endless belt through the drive rotating member. The supporting portion is configured to be swingable about the shaft and the endless belt is raised and lowered by the supporting portion being swung by a lifting portion.

Abstract: The purpose of the present invention is to provide a sheet bundle binding processing apparatus capable of performing a binding process rapidly and efficiently while the binding process can be selected by an operator. The present invention comprises a sheet bundle binding processing apparatus including a processing tray on which sheets are stacked, an insertion portion to which a sheet bundle is inserted, a first binding device which performs a predetermined binding process on a sheet bundle stacked on the processing tray and the predetermined binding process on a sheet bundle inserted to the insertion portion, and a second binding device which performs a binding process being different from the predetermined binding process on a sheet bundle stacked on the processing tray.

Abstract: A sheet processing apparatus includes a binding portion binding a plurality of sheets stacked on a sheet stacking portion as a bundle by deforming the sheets without a staple. The sheet processing apparatus further includes a moving member moving the sheet bundle bound at a binding position by the binding portion from the binding position and a restricting member restricting the move of the sheet bundle such that a distance between the sheet bundle and the moving member is kept to be less than a predetermined distance in moving the sheet bundle by the moving member.

Abstract: A sheet processing apparatus includes a binding unit including a first portion and a second portion and configured to nip a sheet bundle between the first portion and the second portion to deform the sheet bundle in a thickness direction to bind the sheet bundle, and a detachment unit configured to push the bound sheet bundle toward the second portion to detach the bound sheet bundle from the first portion.

Abstract: A sheet processing apparatus includes: a binding unit that sandwiches and binds a plurality of sheets by using a convex portion and a concave portion; a moving unit that moves at least one of the convex portion and the concave portion; a drive unit that drives the moving unit; and a control unit that controls the drive unit so that a state in which the binding unit sandwiches the plurality of sheets at a predetermined pressing force by using a driving force from the drive unit is retained for a predetermined time period, and so that the one of the convex portion and the concave portion is moved in a direction away from the another of the convex portion and the concave portion after the predetermined time period has elapsed.

Abstract: A staple-less binding unit including a pair of upper and lower teeth binds a sheet bundle which is discharged to an intermediate processing tray by a sheet discharge portion and whose one edge abuts against a rear edge stopper. A control portion switches a binding mode of the staple-less binding unit that implements the binding process on the sheet bundle in a first binding mode of binding the sheet bundle without any staple such that the pair of upper and lower teeth bite across an edge of the sheet bundle and in a second binding mode of binding the sheet bundle without any staple such that the pair of upper and lower teeth do not bite across any edge of the sheet bundle.

Abstract: A sheet processing apparatus in which a sheet bundle including a plurality of sheets discharged onto an intermediate processing tray is received in a receiving portion of a stapler and bound with use of a staple, and a sheet bundle including a plurality of sheets discharged onto the intermediate processing tray is received in a receiving portion of a staple-less binding unit having a gap in the thickness direction of the sheets smaller than that of the receiving portion of the stapler and bound without using a staple, wherein when the stapler performs the binding process, the staple-less binding unit is arranged in a position shifted in a width direction orthogonal to a sheet discharge direction from a region on the intermediate processing tray, through which the sheets discharged by a sheet discharging portion pass.

Abstract: A sheet conveyance apparatus includes a shift unit which includes a conveyance roller pair capable of being placed in a contact state and a separation state and configured to convey sheets having an overlapping portion where a rear end portion of a preceding sheet and a front end portion of a following sheet overlap each other. The shift unit is movable in a widthwise direction while conveying the sheets by the conveyance roller pair. The sheet conveyance apparatus moves the shift unit in the widthwise direction when it is determined that the overlapping portion of the sheets has reached the conveyance roller pair.

Abstract: A sheet processing apparatus that forms unevenness on a sheet bundle including a plurality of sheets to bind the sheet bundle includes: a scoring portion that scores the sheet along an edge of the sheet bundle apart from the edge of the sheet bundle at a predetermined interval; and a binding portion that forms an unevenness between the edge of the sheet bundle and the score formed on the sheet bundle by the scoring portion while the sheet bundle is nipped between a pair of tooth-like members, each of which has a concavo-convex portion that meshes with each other.

Abstract: A toner image is formed on a sheet based on image data by an image forming portion, and a plurality of sheets on which the toner image is formed is bound together by a stapleless binding unit including a pair of tooth-like members, each having a concave and convex portion. Then, the image data is corrected by a correction portion so that a ratio of toner within a part of the sheet to be subjected to binding processing by the stapleless binding unit is equal to or smaller than a predetermined value.

Abstract: A sheet processing apparatus includes: a holding portion which holds a booklet containing a two-folded sheet; and a pressing portion which presses a spine of a booklet into shapes during movement along the spine of the booklet held by the holding portion. The pressing portion can decrease, or release a pressing force to be applied to the booklet spine within a predetermined area of a moving range in which the pressing roller moves along the booklet spine.

Abstract: A sheet conveyance apparatus includes a shift unit which includes a conveyance roller pair capable of being placed in a contact state and a separation state and configured to convey sheets having an overlapping portion where a rear end portion of a preceding sheet and a front end portion of a following sheet overlap each other. The shift unit is movable in a widthwise direction while conveying the sheets by the conveyance roller pair. The sheet conveyance apparatus moves the shift unit in the widthwise direction when it is determined that the overlapping portion of the sheets has reached the conveyance roller pair.

Abstract: A scrap stacking apparatus includes a stacking portion to which scraps, generated in processing portions that carry out processes on sheets, are stacked, an oscillation portion that is placed out of the stacking portion, and generates an electromagnetic wave, and a receiving portion that is placed out of the stacking portion, and receives the electromagnetic wave oscillated by the oscillation portion through the stacking portion, wherein the oscillation portion generates an electromagnetic wave in a band from 30 GHz to 100 THz, and the electromagnetic wave, oscillated by the oscillation portion, is received by the receiving portion through the stacking portion so that a stacked state of the scraps housed in the stacking portion is detected.

Abstract: A sheet processing apparatus and an image forming apparatus are provided which can stabilize the shape of the spine after a squaring process. To square a spine Sb of a sheet bundle S, a spine processing apparatus 400 which squares the spine Sb performs squaring of the spine by moving the spine Sb which projects from a pair of first nipping rollers 405 and 406 while pressing the spine Sb by means of a pressing roller 411 in a state where the spine Sb is nipped by a pair of second nipping rollers 403 and 404.

Abstract: A sheet processing apparatus comprises: a conveying portion which contacts a doubled up booklet and conveys the booklet; an end conveying portion which abuts against an open end of the booklet and pushes out the booklet, thereby conveying the booklet; a stopper which abuts against a back of the booklet to position the booklet; a holding portion which holds the booklet which abuts against the stopper; a processing portion which processes the booklet held by the holding portion; wherein the conveying portion can come into contact with and separate from the booklet, the conveying portion separates from the booklet, or a pressure for bringing the conveying portion into contact with the booklet is reduced before the back of the booklet abuts against the stopper, the back of the booklet is abutted against the stopper by the end conveying portion and then, the holding portion holds the booklet.

Abstract: A sheet processing apparatus includes: a holding portion which holds a booklet containing a two-folded sheet; and a pressing portion which presses a spine of a booklet into shapes during movement along the spine of the booklet held by the holding portion. The pressing portion can decrease, or release a pressing force to be applied to the booklet spine within a predetermined area of a moving range in which the pressing roller moves along the booklet spine.

Abstract: A sheet processing apparatus and an image forming apparatus according to the present invention includes an upper blade capable of moving up and down and a lower blade to cut a sheet bundle between the upper blade and the lower blade by downward movement of the upper blade. When the sheet bundle is cut by the downward movement of the upper blade, an assisting sheet is moved to a position below a blade edge of the upper blade such that cutting waste of the cut sheet bundle is dropped down without being adhered to the lower blade.

Abstract: A sheet processing apparatus and an image forming apparatus are provided which can stabilize the shape of the spine after a squaring process. To square a spine Sb of a sheet bundle S, a spine processing apparatus 400 which squares the spine Sb performs squaring of the spine by moving the spine Sb which projects from a pair of first nipping rollers 405 and 406 while pressing the spine Sb by means of a pressing roller 411 in a state where the spine Sb is nipped by a pair of second nipping rollers 403 and 404.

Abstract: A sheet processing apparatus includes: a holding portion which holds a booklet containing a two-folded sheet; and a pressing portion which presses a spine of a booklet into shapes during movement along the spine of the booklet held by the holding portion. The pressing portion can decrease, or release a pressing force to be applied to the booklet spine within a predetermined area of a moving range in which the pressing roller moves along the booklet spine.

Abstract: A scrap stacking apparatus includes a stacking portion to which scraps, generated in processing portions that carry out processes on sheets, are stacked, an oscillation portion that is placed out of the stacking portion, and generates an electromagnetic wave, and a receiving portion that is placed out of the stacking portion, and receives the electromagnetic wave oscillated by the oscillation portion through the stacking portion, wherein the oscillation portion generates an electromagnetic wave in a band from 30 GHz to 100 THz, and the electromagnetic wave, oscillated by the oscillation portion, is received by the receiving portion through the stacking portion so that a stacked state of the scraps housed in the stacking portion is detected.