| 摘要 |
<p>In a sheet stacking apparatus, for example a sheet receiver at the output of a sorter, or the feed compartment receiving a stack of sheets at the input of a sorter, to form the sheets into a better stack, a roller (5) having a surface with a high co-efficient of friction is positioned transversely to the plane of the sheets in the stack so that a longitudinal portion of the roller periphery extends through a gap in the base (1) to contact the sheets along a line extending transversely across the lower edges of the sheets in the stack, the friction roller when rotated urging the sheets against an end support (3) of the sheet receiver. The lateral movement of the sheets by the friction roller may be facilitated by the provision of a cam wheel (7) with its axis parallel to the friction roller axis and contacting the lower edges of the sheets in the stack through a gap in the base, and air jets above the stack. The friction roller (5) may have a brush-like surface. <IMAGE></p> |
