| 摘要 |
<p>Two planar registration surfaces (18,20) extend upwardly from a sheet support surface (16) and intersect to form a ninety degree angle between them. A rubber based roller (22) and a tangentially extending rubber based flexible tab (24) are both rotatably mounted above the sheet support surface, the tab positioned to frictionally engage a topmost sheet of a stack on the sheet support surface and to exert a force on the topmost sheet in a direction that intersects the registration surfaces at their intersection. A stop (39) extends from at least one registration surface for preventing a curled sheet from moving up a registration surface when impelled by the flexible tab. A motor (28) is used for rotating the roller and flexible tab so as to register the topmost sheet against both the registration surfaces. A detector determines when a stack of sheets reaches a predetermined distance from the tab and controls movement of the sheet support surface away from the tab by a distance, the distance still enabling the tab to engage a topmost sheet of the stack.</p> |
