The production of offset stacks of business forms is effected in a continuous (i.e. without interruption) manner until a vertical stacker into which the forms are fed is full. Between a detacher and the stacker, the forms are automatically and continuously directed either to the left or the right from...http://www.google.ca/patents/US5540370?utm_source=gb-gplus-sharePatent US5540370 - Offset job separator
