A vertically extending stripper bar is manipulated to strip a stack of articles from a conveyor while the conveyor is carrying the articles downwardly at high speed. A carriage is mounted for being vertically movable. A pneumatic cylinder is coupled to the carriage. The stripper bar is supported on horizontal...http://www.google.es/patents/US4927322?utm_source=gb-gplus-sharePatente US4927322 - Stack stripper for a stacking machine
