Patent ID: 7722034

Claim:
A sheet discharge tray having a stacking surface adapted to stack sheets that are discharged in a discharging direction from a sheet discharge section of a sheet conveying apparatus adapted to convey sheets, comprising: an extension tray comprising a plate-shaped member on which is formed an extension stacking surface for extending said stacking surface in said discharging direction; a pivot adapted to make said extension tray rotatable between a first position at which said extension stacking surface is facing said stacking surface and a second position for extending said stacking surface; at least two first ribs which are disposed on said extension stacking surface and are elongate substantially in said discharging direction, so as to stack the sheets thereon when said extension tray is at said second position; and at least two second ribs which are disposed on a surface of said extension tray opposite to said extension stacking surface and are elongate substantially in said discharging direction, so as to stack the sheets thereon when said extension tray is at said first position; wherein, when said extension tray is at said second position, said first ribs are arranged respectively such that an upper end of a discharging direction downstream end portion thereof is higher than an upper end of a discharging direction upstream end portion thereof, whereas, when said extension tray is at said first position, said second ribs are arranged respectively such that an upper end of a discharging direction downstream end portion thereof is higher than an upper end of a discharging direction upstream end portion thereof.