Bag top aligning device

Claim 1

IN A BAG FILLING AND CLOSING APPARATUS COMPRISING FILLING AND CLOSING MEANS THE IMPROVEMENT WHICH COMPRISES A BAG TOP ALIGNING DEVICE LOCATED BETWEEN SAID FILLING AND CLOSING MEANS AND COMPRISING IN COMBINATION A MEANS FOR CONVEYING A FILLED BAR; A PAIR OF PIN RETAINING MEANS POSITIONED ABOVE SAID BAG CONVEYING MEANS, SLIDABLY MOUNTED ON RODS SAID RODS EXTENDING TOWARDS SAID CLOSING MEANS IN A DIRECTION PARALLEL TO THAT OF THE MOVEMENT OF THE BAG FROM SAID FILLING MEANS TO SAID CLOSING MEANS; INDIVIDUAL PINS SLIDABLY EXTENDABLE AND RETRACTABLE WITHIN SAID PIN RETAINING MEANS AND ADAPTED TO ENTER THE OPEN MOUTH OF THE BAG; DIFFERENTIAL COUNTERWEIGHTS INDIVIDUALLY ATTACHED TO EACH OF SAID PIN RETAINING MEANS, THE HEAVIER COUNTERWEIGHT BEING ADAPTED TO EFFECT MOVEMENT OF THE PIN RETAINING MEANS TO WHICH IT IS ATTACHED IN THE DIRECTION OF THE MOVEMENT OF THE BAG AND THE DIFFERENCE BETWEEN THE COUNTERWEIGHTS BEING SUCH THAT THE TOP EDGES OF THE BAG ARE EXTENDED AND ALIGNED WHEN EQUIBILIBRIUM BETWEEN THE COUNTERWEIGHT FORCES IS ATTAINED; AND HOLDING MEANS ADAPTED TO RETAIN SAID PIN RETAINING MEANS IN THEIR ORIGINAL POSITION NEAR SAID FILLING MEANS WHEN THE ALIGNING PINS ARE RETRACTED THEREIN AND TO RELEASE SAID PIN RETAINING MEANS FOR MOVEMENT ALONG SAID RODS UNDER THE INFLUENCE OF THE DIFFERENTIAL COUNTERWEIGHTS AND THAT OF THE MOVEMENT OF THE BAG TOWARDS SAID CLOSING MEANS WHEN SAID ALIGNING PINS ARE EXTENDED INTO THE OPEN MOUTH OF SAID BAG.