Bag-making machines

Claim 1

A BAG-MAKING MACHINE COMPRISING IN COMBINATION; BAG BLANK FORMING MEANS FOR FORMING A TUBULAR BAG BLANK OF PREDETERMINED LENGTH HAVING A TOP AND BOTTOM LAYER CONNECTED BY OPPOSED LONGITUDINALLY EXTENDING BELLOWS FOLDS ALONG THEIR LONGITUDINAL SIDE EDGES AND HAVING A PAIR OF SPACED SLITS IN BOTH LAYERS IN AN ALIGNED RELATIONSHIP; BLANK FEEDING MEANS FOR FEEDING THE BLANKS AS THEY ARE FORMED; SCORING MEANS FOR FORMING A PAIR OF SPACED TRANSVERSE SCORE LINES IN BOTH LAYERS OF SAID BLANK, BOTH OF SAID CORE LINES BEING SPACED FROM AND PROXIMAL THE LEADING END OF SAID BLANK FOR COOPERATING IN DETERMINING THE BAG BOTTOM; BAG BOTTOM OPENING MEANS FOR DISTENDING THE LEADING END OF SAID BAG BLANK SUCH THAT THIS END IS FULLY UNFOLDED TRANSVERSELY; BAG BOTTOM FLATTENING MEAND FOR FOLDING THE UPPER LAYER OF THE BAG BLANK ON ITSELF FROM THE SCORE LINE NEARES THE TRAILING END OF THE LEADING END OF THE BAG BLANK; TUCKING MEANS FOR TUCKING THE BAG BLANK ALONG THE SCORE LINE OF THE BOTTOM LAYER NEAREST SAID LEADING END OF THE BAG BLANK, AND ALSO THE BAG BLANK ALONG THE SCORE LINE OF SAID UPPER LAYER NEAREST SAID LEADING END; BAG BOTTOM PASTE APPLYING MEANS FOR APPLYING PASTE ALONG ZONES OF THE INNER FACE OF THE BOTTOM LAYER BETWEEN THE SLITS FORMED THEREIN AND THE OUTER FACE OF THE BLANK BETWEEN THE ALIGNED SLITS IN THE TOP AND BOTTOM LAYERS THEREOF; UPPER LAYER FLAP FOLDING MEANS FOR FOLDING THE UPPER LAYER UPON ITSELF ALONG ITS SCORE LINE NEAREST SAID LEADING END AND INCLUDING AT LEAST ONE FLAIL, ACTUATING MEANS FOR ROTATING SAID FLAIL IN A TIMED RELATIONSHIP WITH RESPECT TO THE MOVEMENT OF THE BAG BLANK SUCH THAT WHEN ROTATED, THE FLAIL IS ADAPTED TO ENGAGE THE OUTER FACE OF THE UPPER LAYER TO FOLD THE UPPER LAYER UPON ITSELF, SAID FLAIL INCLUDING AN ELONGATED EDGE FOR ENGAGING THE OUTER FACE OF THE UPPER LAYER AND SAID ACTUATING MEANS OPERATING TO CAUSE THE FLAIL ENGAGING EDGE PORTION OF SHORTER RADIUS ENGAGING THE OUTER FASCE OF THE UPPER LAYER INITIALLY TO KEEP THE FORCES OF IMPACT ENGAGEMENT AT A RELATIVELY LOW VALUE WITH THE REMAINING PORTIONS OF THE ENGAGING EDGE OF THE FLAIL SUBSEQUENTLY ENGAGING THE OUTER FACE OF THE UPPER LAYER TO COMPLETE THE FOLDING OF THE UPPER LAYER UPON ITSELF; BOTTOM LAYER FLAP FOLDING MEANS FOR FOLDING THE LOWER LAYER UPON ITSELF ALONG ITS SCORE LINE NEAREST SAID LEADING END; PRESSURE MEANS FOR APPLYING PRESSURE TO THE LEADING END OF SAID BAG BLANK TO SECURE ASSOCIATED SURFACES OF SAID BLANK HAVING PASTE INTERPOSED THEREBETWEEN TO THUS FORM A FINISHED BAG; AND STACKING MEANS FOR STACKING BAGS AS THEY ARE FINISHED BY SAID MACHINE.