Apparatus for closing bags of heat sealable packaging material

Claim 1

A BAG CLOSING MACHINE INCLUDING A MOUNTING FRAME, A FIRST TOOL CARRIER HAVING FOLDING TOOLS MOUNTED THEREON, A SECOND TOOL CARRIER HAVING HEATED TACKING TOOLS MOUNTED THEREON TO TEMPORARILY AND PROVISIONALLY TACK FOLDS OF THE BAG AFTER SUCH FOLDS ARE PRODUCED BY SAID FOLDING TOOLS, THE DRIVE MEANS FOR THE COORDINATED OPERATION OF THE FOLDING AND TACKING TOOLS, A SEALING DEVICE REACHED BY A FOLDED AND TACKED BAG IN A SUBSEQUENT STEP OF THE OPERATION OF THE MACHINE TO FINALLY SEAL THE BAG BY SEALING THE FOLDS PROVISIONALLY TACKED BY SAID TACKING TOOLS, TO THEREBY COMPLETELY CLOSE THE BAG, AT LEAST ONE PAIR OF COOLING JAWS CARRIED BY SAID TACKING TOOLS, AND BRACKETS INCLUDING SPRING MEANS ATTACHING AT LEAST ONE COOLING JAW BELOW EACH TACKING TOOL TO BIAS SAID COOLING JAWS INTO ENGAGEMENT WITH SAID BAG FOR A PREDETERMINED TIME BOTH PRIOR TO AN ENGAGEMENT OF THE TACKING TOOLS AND AFTER RELEASE OF THE BAG BY THE TACKING TOOLS.