Bag opening and filling machine

Claim 1

A BAG OPENING FILLING MACHINE FOR OPENING AND FILLING OPEN TOP BAGS EACH HAVING A FLAP EXTENDING UPWARDLY ABOVE ITS OPEN TOP, SUCH MACHINE COMPRISING A BAG SUPPORTING RACK FOR A SUPPLY OF SUCH BAGS CONSTRUCTED AND ARRANGED TO FRANGIBLY ENGAGE THE UPWARDLY EXTENDING FLAPS OF THE RESPECTIVE BAGS, AN AIR SUPPLY DUCT POSITIONED SO AS TO DIRECT A FLOW OF AIR DOWNWARDLY AGAINST THE OPEN TOP OF THE FOREMOST BAG OF THE STACK THEREOF, A VALVE MOUNTED WITHIN THE AIR SUPPLY DUCT, A RECTANGULAR GUIDE FUNNEL POSITIONED ABOVE AND IN FRONT OF THE OPEN TOP OF THE FOREMOST BAG OF THE STACK THEREOF, SAID FUNNEL BEING COMPOSED OF TWO COMPLEMENTARY HALVES JOINTED TOGETHER ALONG TWO OPPOSITE TELESCOPING SIDES THEREOF, A ROCKET ARM SUPPORTING EACH OF THE TWO HALVES OF THE FUNNEL FOR TELESCOPING MOTION FROM A COMPLETE FUNNEL FROM TO A BAGGUIDE FORM IN WHICH THE LOWER END OF THE FUNNEL IS CONTRACTED AND THE UPPER END OF THE FUNNEL IS EXPANDED, AND A TRIP LEVER HAVING TWO OPERATION POSITIONS AND CONNECTED TO THE FUNNEL AND VALVE SO AS SIMULTANEOUSLY TO MOVE THE TWO HALVES OF THE FUNNEL TO THE BAG-GUIDE FORM AND TO OPEN THE VALVE WHEN THE TRIP LEVER IS IN ONE OPERATIVE POSITION AND SO AS SIMULTANEOUSLY TO CLOSE THE VALVE AND TO MOVE THE TWO HALVES OF THE FUNNEL TO THE COMPLETE FORM WITH THE LOWER END OF THE FUNNEL ENGAGING AND SUPPORTING THE AIR-OPENED TOP PORTION OF THE BAG WHEN THE TRIP LEVER IS IN THE OTHER OPERATIVE POSITION.