Tabloid folding machine

Claim 1

A TABLOID FOLDING MACHINE COMPRISING MEANS FOR ADVANCING SINGLY FROM A STACK OF WORK PIECES EACH COMPOSED OF A PLURALITY OF SHEETS HAVING A FOLDED SIDE EDGE WITH THE OTHER THREE EDGES OF THE SHEETS CUT AND LYING ONE OVER THE OTHER, SAID MEANS PROVIDED WITH FEEDING MEANS COMPENSATING FOR THE EXTRA THICKNESS OF THE FOLDED EDGE AND SAID MEANS FOR ADVANCING THE WORK PIECES ARRANGED TO ADVANCE THE WORK PIECES TO A POSITION UNDERLYING A RECIPROCATING BUCKLE FOLDING KNIFE, SPACED FEED BELTS UNDERLYING THE POSITION OF THE WORK PIECES UNDER SAID RECIPROCATING KNIFE, MEANS FOR RECIPROCATING SAID BUCKLE FOLDING KNIFE, SPACED DROP ROLLERS MOUNTED ON PIVOTED LEVERS AND PROVIDED WITH SEGMENTAL GEAR DRIVES TIMED WITH SAID MEANS FOR RECIPROCATING THE BUCKLE FOLDING KNIFE AND ADAPTED AT A CERTAIN PREDETERMINED SEQUENCE OF OPERATION OF SAID MEANS FOR RECIPROCATING THE KNIFE TO LOWER THE DROP ROLLERS TO ENGAGE THE UPPER SURFACES OF THE WORK PIECES AND CAUSE THEM TO FEED ALONG ON THE FEED BELTS, AN ADJUSTABLE STOP AGAINST WHICH THE FORWARD EDGE OF THE WORK PIECE ABUTS AT THE END OF ITS POSITIONING MOVEMENT, AND SAID MEANS FOR RECIPROCATING THE KNIFE ACTUABLE WHEN THE WORK PIECE IS POSITIONED AGAINST THE STOP.