Abstract: A measurement apparatus includes a first conveyance path, a second conveyance path, a measuring portion, a third conveyance path and a sheet stacking portion. A sheet discharged out of an image forming apparatus is conveyed toward a downstream apparatus through the first conveyance path. The second conveyance path is branched from the first conveyance path, extended below the first conveyance path, and merged with the first conveyance path. The measuring portion is disposed on the second conveyance path. The third conveyance path is provided above the first conveyance path and is configured to convey the sheet from which a test image has been measured by the measuring portion in the second conveyance path. The sheet stacking portion is provided above the first conveyance path, and the sheet discharged out of the third conveyance path is stacked on the sheet stacking portion.

Abstract: A measurement apparatus includes a sheet stacking portion provided above a first conveyance path and on which a second sheet discharged out of a second conveyance path is stacked. The sheet stacking portion includes an extension tray configured to support the sheet discharged out of the second conveyance path and to be movable between a first position and a second position, the first position being a position where the extension tray is located inside a width of the measurement apparatus in the horizontal direction, and the second position being a position where the extension tray is located above an upstream apparatus and is overlapped with the upstream apparatus when viewed in a gravity direction.

Abstract: A measuring device a measurement unit configured to measure an image on a sheet, the measurement unit including a light emitting portion configured to illuminate the sheet with light, and a detecting portion configured to detect light reflected by the sheet; a supporting unit supporting the measurement unit; and a driving unit configured to move the measurement unit supported by the supporting unit in a scanning direction. A size, in the scanning direction, of a detectable range of the detecting portion in which the detecting portion is capable of detecting the reflected light from the sheet is larger than a size, in a sub-scanning direction perpendicular to the scanning direction and a normal direction of a surface of the sheet, of the detectable range of the detecting portion.

Abstract: A measurement apparatus includes a first conveyance path, a second conveyance path, a measuring portion, a third conveyance path and a sheet stacking portion. A sheet discharged out of an image forming apparatus is conveyed toward a downstream apparatus through the first conveyance path. The second conveyance path is branched from the first conveyance path, extended below the first conveyance path, and merged with the first conveyance path. The measuring portion is disposed on the second conveyance path. The third conveyance path is provided above the first conveyance path and is configured to convey the sheet from which a test image has been measured by the measuring portion in the second conveyance path. The sheet stacking portion is provided above the first conveyance path, and the sheet discharged out of the third conveyance path is stacked on the sheet stacking portion.

Abstract: Disclosed is a sheet stacking apparatus which includes a first stacking portion on which a sheet is stacked, a second stacking portion which is movable with respect to the first stacking portion, a third stacking portion which is detachably attachable to the first stacking portion or the second stacking portion and a restricting portion which restricts disengagement of the third stacking portion which has been attached. The second stacking portion is movable such that the second stacking portion is located at a first position where the restricting portion does not restrict disengagement of the third stacking portion and a second position where the restricting portion restricts disengagement of the third stacking portion which has been attached.

Abstract: An image forming apparatus includes an image forming unit forming images on a first sheet and a second sheet having a higher stiffness than the first sheet, a discharge rotary member pair, and a sheet supporting unit to support the first and second sheets discharged through the discharge rotary member pair. In addition, an abutment surface abuts against upstream ends of the first and second sheets supported on the sheet supporting unit, and an elevation unit moves the sheet supporting unit up and down. A control unit, in a state where no sheet is supported on the sheet supporting unit, executes a first discharge mode of controlling the elevation unit to position the sheet supporting unit at a first position before the discharge rotary member pair starts discharging the first sheet, and a second discharge mode of controlling the elevation unit to position the sheet supporting unit at a second position lower than the first position.

Abstract: A sheet stacking apparatus includes a discharging portion including a nip portion nipping and conveying a sheet, a stacking portion on which the sheet discharged by the discharging portion is stacked, an air blowing unit configured to blow air toward a lower face of the sheet being discharged by the discharging portion, and an air volume control portion configured to control the air blowing unit such that a volume of the air blown by the air blowing unit is switched from a first air volume to a second air volume which is smaller than the first air volume while the nip portion of the discharging portion is nipping and conveying the sheet to set the volume of the air to the second air volume in a case where a trailing end of the sheet discharged by the discharging portion passes through the nip portion.

Abstract: A sheet processing apparatus includes a creasing unit; a support supporting a sheet on which a crease has been formed, a folding roller folding the sheet supported by the support while rotating at a folding speed, a thrusting member moving at a thrust speed higher than the folding speed, and to thrust the sheet such that the sheet is folded at a position where the crease has been formed, and a control unit performing control such that a difference between a folding speed of the folding roller and a thrust speed of the thrusting member, in a case in which the folding roller folds a first number of sheets, is smaller than a difference between the folding speed and the thrust speed, in a case in which the folding roller folds a second number of sheets that is larger than the first number of sheets.

Abstract: A sheet stacking apparatus includes a discharging portion including a nip portion nipping and conveying a sheet, a stacking portion on which the sheet discharged by the discharging portion is stacked, an air blowing unit configured to blow air toward a lower face of the sheet being discharged by the discharging portion, and an air volume control portion configured to control the air blowing unit such that a volume of the air blown by the air blowing unit is switched from a first air volume to a second air volume which is smaller than the first air volume while the nip portion of the discharging portion is nipping and conveying the sheet to set the volume of the air to the second air volume in a case where a trailing end of the sheet discharged by the discharging portion passes through the nip portion.

Abstract: A sheet discharge apparatus includes a sheet stacking portion on which a sheet discharged by a discharging portion is stacked, and a control portion configured to control a moving unit such that a height position of an uppermost sheet stacked on the sheet stacking portion becomes a first height position. In a case where a sheet detection portion detects that the height position of the uppermost sheet is above a second height position, the control portion sets a sheet discharge speed of the discharging portion to a first sheet discharge speed. In a case where the sheet detection portion detects that the height position of the uppermost sheet becomes lower than the second height position, the control portion controls the sheet discharge speed to be a second sheet discharge speed faster than the first sheet discharge speed.

Abstract: A sheet stacking apparatus includes a discharging portion including a nip portion nipping and conveying a sheet, a stacking portion on which the sheet discharged by the discharging portion is stacked, an air blowing unit configured to blow air toward a lower face of the sheet being discharged by the discharging portion, and an air volume control portion configured to control the air blowing unit such that a volume of the air blown by the air blowing unit is switched from a first air volume to a second air volume which is smaller than the first air volume while the nip portion of the discharging portion is nipping and conveying the sheet to set the volume of the air to the second air volume in a case where a trailing end of the sheet discharged by the discharging portion passes through the nip portion.

Abstract: A control portion controls a distance H and/or a shift amount L1 such that a relationship of L<H?L+L1 holds, where L is a length of each sheet among the sheet bundle in the conveyance direction, H is a distance from the conveyance roller pair to an end regulation member in the conveyance direction, and L1 is a shift amount between a first sheet among the sheet bundle and a second sheet adjacent the first sheet. The second sheet is conveyed toward the end regulation member by the conveyance roller pair in the state in which the leading edge of the preceding sheet is in contact with the end regulation member.

Abstract: A sheet processing apparatus includes a first stacking portion on which a sheet conveyed by a conveying portion is stacked, a binding portion which forms, in a sheet bundle stacked on the first stacking portion, a tongue cut out from the sheet, with a part of the tongue attached to the sheet, and a slit, and which binds the sheet bundle by inserting a tip of the tongue of the sheet bundle in the slit of the sheet bundle, and a second stacking portion on which the sheet bundle bound by the binding portion is stacked. In the sheet processing apparatus, a plurality of recessed parts is formed on a guide face of the binding portion, the recessed parts extending in different directions from each other.

Abstract: Disclosed is a sheet stacking apparatus which includes a first stacking portion on which a sheet is stacked, a second stacking portion which is movable with respect to the first stacking portion, a third stacking portion which is detachably attachable to the first stacking portion or the second stacking portion and a restricting portion which restricts disengagement of the third stacking portion which has been attached. The second stacking portion is movable such that the second stacking portion is located at a first position where the restricting portion does not restrict disengagement of the third stacking portion and a second position where the restricting portion restricts disengagement of the third stacking portion which has been attached.

Abstract: A sheet processing apparatus includes a creasing unit; a support supporting a sheet on which a crease has been formed, a folding roller folding the sheet supported by the support while rotating at a folding speed, a thrusting member moving at a thrust speed higher than the folding speed, and to thrust the sheet such that the sheet is folded at a position where the crease has been formed, and a control unit performing control such that a difference between a folding speed of the folding roller and a thrust speed of the thrusting member, in a case in which the folding roller folds a first number of sheets, is smaller than a difference between the folding speed and the thrust speed, in a case in which the folding roller folds a second number of sheets that is larger than the first number of sheets.

Abstract: A control portion controls a distance H and/or a shift amount L1 such that a relationship of L<H?L+L1 holds, where L is a length of each sheet among the sheet bundle in the conveyance direction, H is a distance from the conveyance roller pair to an end regulation member in the conveyance direction, and L1 is a shift amount between a first sheet among the sheet bundle and a second sheet adjacent the first sheet. The second sheet is conveyed toward the end regulation member by the conveyance roller pair in the state in which the leading edge of the preceding sheet is in contact with the end regulation member.

Abstract: A sheet stacking apparatus includes a discharging portion including a nip portion nipping and conveying a sheet, a stacking portion on which the sheet discharged by the discharging portion is stacked, an air blowing unit configured to blow air toward a lower face of the sheet being discharged by the discharging portion, and an air volume control portion configured to control the air blowing unit such that a volume of the air blown by the air blowing unit is switched from a first air volume to a second air volume which is smaller than the first air volume while the nip portion of the discharging portion is nipping and conveying the sheet to set the volume of the air to the second air volume in a case where a trailing end of the sheet discharged by the discharging portion passes through the nip portion.

Abstract: A sheet discharge apparatus includes a sheet stacking portion on which a sheet discharged by a discharging portion is stacked, and a control portion configured to control a moving unit such that a height position of an uppermost sheet stacked on the sheet stacking portion becomes a first height position. In a case where a sheet detection portion detects that the height position of the uppermost sheet is above a second height position, the control portion sets a sheet discharge speed of the discharging portion to a first sheet discharge speed. In a case where the sheet detection portion detects that the height position of the uppermost sheet becomes lower than the second height position, the control portion controls the sheet discharge speed to be a second sheet discharge speed faster than the first sheet discharge speed.

Abstract: An image forming apparatus includes a discharge rotary member pair discharging a sheet, a sheet supporting unit on which the sheet discharged is supported, the sheet supporting unit including a first support surface, and a second support surface provided downstream, in a sheet discharge direction, of the first support surface, an abutment surface against which an upstream end, in the sheet discharge direction, of the sheet, an elevation unit moving the sheet supporting unit up and down, and a control unit. The control unit is configured to executes a first discharge mode controlling the elevation unit such that the sheet supporting unit is positioned at a first position before the discharge rotary member pair starts discharging a first sheet, and a second discharge mode controlling the elevation unit such that the sheet supporting unit is positioned at a second position lower than the first position.

Abstract: Provided is a sheet processing apparatus, including: a sheet conveying portion conveying a sheet to a sheet stacking portion; a regulating portion regulating a position of the sheet on the stacking portion; a rotary member pair having first and second rotary members and conveying the sheet toward the regulating portion through rotation in a first direction, and conveying a bound sheet bundle through rotation in a second direction opposite to the first direction; a moving portion moving the second rotary member to a separation position after the rotary member pair conveys the sheet, and moving the second rotary member to a nipping position before the rotary member pair conveys the sheet bundle; and a control portion controlling to rotate the rotary member pair in the second direction after the second rotary member is moved to the separation position and before the second rotary member is moved to the nipping position.