Device for stacking flat postal articles

摘要

The present invention relates to an apparatus for stacking articles. The articles may comprise mail pieces. The apparatus comprises a base having a top surface. The top surface defines a rake element having extending fingers defining open spaces therebetween. A receiving unit is mounted proximate to the rake. The unit may be made to rotate. The unit further comprises a plurality of coils. The coils may be helical, concentric and vertically displaced so as to define a vertical open space therebetween. When rotating, the coils may be made to move in the direction of a support positioned atop the top surface. The support may further comprise a spring bias to urge the support against a stack of articles. A supporting wall is also provided as well as a supply element which directs incoming articles into the vertical opening. The movement of the coils transports the articles to a stack which is support on one side by the support, on another by the supporting wall and on yet another by the top surface.