A material processing apparatus for collating and feeding documents, comprising a plurality of document feeding modules, each of the modules including a source of documents, a queuing station, means for feeding documents from the source to the queuing station control means, and sensing means for sensing...http://www.google.de/patents/US4970654?utm_source=gb-gplus-sharePatent US4970654 - Asynchronous queuing and collation passage in an inserter
