Work-stacking mechanism

Claim 1

APPARATUS FOR STACKING RELATIVELY FLAT PIECES OF FLEXIBLE MATERIAL WHICH COMPRISES, MENAS PROVIDING A SUPPORTING SURFACE ALONG WHICH SAID PIECES MAY BE ADVANCED, SAID MEANS HAVING AN EDGE TOWARD WHICH SAID PIECES ARE ADVANCED, MEANS FOR ADVANCING SUCCESSIVE PIECES OF SAID MATERIAL TOWARD SAID EDGE AND INTO OVERHANGING RELATIONSHIP TO SAID EDGE, A STACKING BAR SWINGABLE IN AN ARC BELOW SAID SUPPORTING SURFACE PARTLY IN A REGION BENEATH THE LATTER AND PARTLY OUTWARDLY FROM SAID EDGE THEREOF, SAID BAR BEING MAINTAINED IN SUBSTANTIALLY PARALLEL RELATION TO SAID EDGE AND CARRIED THROUGH THE REGION IN WHICH THE OVERHANGING PORTIONS OF SUCCESSIVE WORKPIECES ARE DISPOSED, CLAMPING MEANS AT OPPOSITE SIDES OF SAID BAR AND SPRING URGED TOWARD THE LATTER, MEANS FOR DETAINING SAID CLAMPING MEANS AGAINST ANY SUBSTANTIAL MOVEMENT BEYOND THE PATH OF THE OVERHANGING PORTIONS OF THE PIECES OPPOSITE TO THE SIDE ON WHICH THEY COOPERATE WITH SAID BAR, AND MEANS FOR SWINGING SAID BAR TO ENGAGE AND PICK-UP SUCCESSIVE PIECES OF THE MANDREL.