A sheet processing apparatus includes a conveyance member configured to convey a sheet, and an alignment portion having a first alignment member and a second alignment member and configured to move relative positions of the first and second alignment members in a width direction orthogonal to a conveyance direction of the sheet by the conveyance member. Each alignment member includes a contact surface coming in contact with one end of the sheet in the width direction, a lower surface facing a lower surface of the sheet that is in contact with the contact surface, a lower portion supporting the lower surface of the sheet that is in contact with the contact surface, and an upper portion facing an upper surface of the sheet that is in contact with the contact surface.

A discharge tray includes a main tray having a support face that supports discharged paper, and an extension tray being supported by the main tray, and being capable of movement between a storage position in which the extension tray is stored in the main tray and an extended position in which the extension tray has been moved to extend along a discharge direction of the paper from a leading end side of the main tray in the discharge direction. A pair of first projections is provided to both ends at the discharge direction leading end side of the main tray, and a pair of second projections that project upward is provided to both ends at the discharge direction leading end side of the extension tray. The pair of second projections are positioned to the inside of the pair of first projections in a width direction orthogonal to the discharge direction.

Provided is a paper feeding device for a printer that is capable of absorbing an impact occurring when a rear end of paper escapes from the outer peripheral surface of a pickup roller and thus comes into contact with a bottom surface of a paper stacking part. The paper feeding device for a printer includes: a paper stacking part for stackedly accommodating at least one or more sheets of paper therein; a pickup roller protruding from a bottom surface of the paper stacking part to feed the paper forward; and buffers linearly protruding from the bottom surface of the paper stacking part to absorb the impact occurring when the rear end of the paper escapes from the outer peripheral surface of the pickup roller and then comes into contact with the bottom surface of the paper stacking part.

A post-processing device is provided with a post-processing unit which performs post-processing of a recording medium on which recording is performed, a transport path through which the recording medium is transported, or a deformation suppressing unit which suppresses deformation of the recording medium on a mounting unit on which the recording medium is mounted, in which the deformation suppressing unit is controlled based on a predetermined parameter related to recording processing with respect to the recording medium.

A sheet stacking apparatus, including: a conveyance unit configured to convey a sheet; a stacking unit on which a sheet conveyed by the conveyance unit is stacked, the stacking unit inclined downward in a conveyance direction in which the conveyance unit conveys a sheet and including a first region and a second region located downstream of the first region in the conveyance direction; a guide portion configured to guide a sheet conveyed by the conveyance unit over a sheet placed on the second region; and a pressing portion configured to press a sheet placed on the second region.

A sheet feeding apparatus includes a feeding rotating member to feed a sheet, and a separating portion to separate and feed one by one the sheet fed by the feeding rotating member. The separating portion includes a separating rotating member to feed a sheet and a separating member to form a separation nip portion by abutting on the separating rotating member. In addition, a sheet stacking portion on which sheets are stacked is disposed to face the feeding rotating member, and a sheet introducing portion guides the sheet toward the separating portion. The sheet introducing portion being is in a downstream side of the sheet stacking portion and positioned above a tangent line at a contacting point between the feeding rotating member and the sheet stacking portion in a vertical direction. A gap portion is disposed on the sheet introducing portion and outside of the feeding rotating member in a sheet width direction perpendicular to a sheet feeding direction and curves the sheet fed by the feeding rotating member in the sheet width direction.

A paper ejection tray assembly for ejecting paper in an ejecting direction in an image reading device includes a tray body including a stacking surface for stacking an ejected paper, and a pair of movable ribs which are arranged a predetermined distance apart from each other in a direction perpendicular to the ejection direction of the paper and which project out from the stacking surface of the tray body at least when paper is ejected from an ejection slot, the pair of ribs respectively have first inclined surfaces with heights from the stacking surface gradually becoming higher from the downstream side toward the upstream side of the ejection direction of the paper so as to guide the paper ejected from the ejection slot.

Provided is an image-forming device with which it is possible to achieve a smaller size while suppressing a reduction in visibility or operability of an operation panel. In this image-forming device, paper sheets are discharged from the rear side of the device toward the front side of the device, and the image formation device is provided with: a paper-sheet-loading unit in which the paper sheets are loaded; an operation panel disposed on the downstream-side end in the paper sheet discharge direction of the paper-sheet-loading unit, at least a part of the operation panel being disposed in a loading region of the paper-sheet-loading unit; and a protruding part disposed to the side of the operation panel in the loading region, the protruding part protruding upward from the top surface of the paper-sheet-loading unit, and extending in the paper sheet discharge direction.

Stacker device to stack sheets of print media. The stacker device comprises a tray to stack the sheets. The tray comprises an M-shaped tray section to apply an M-shaped profile to a sheet along a direction perpendicular to the sheet's advance direction to reduce curling. The stacker device further comprises a roof. The roof comprises at least one adjustable roof portion to limit a height of a curl of the sheet.

A discharge tray includes a main tray having a support face that supports discharged paper, and an extension tray being supported by the main tray, and being capable of movement between a storage position in which the extension tray is stored in the main tray and an extended position in which the extension tray has been moved to extend along a discharge direction of the paper from a leading end side of the main tray in the discharge direction. A pair of first projections is provided to both ends at the discharge direction leading end side of the main tray, and a pair of second projections that project upward is provided to both ends at the discharge direction leading end side of the extension tray. The pair of second projections are positioned to the inside of the pair of first projections in a width direction orthogonal to the discharge direction.