In one embodiment, an article sorting system includes successive coarse and fine singulators and a recirculating loop for processing a disordered stream of items including three-dimensional non-flat articles. A coarse singulator includes cascaded ramped conveyors, preferably operating at progressively...http://www.google.de/patents/US6401936?utm_source=gb-gplus-sharePatent US6401936 - Divert apparatus for conveyor system
