Continuous belt feed, heat sealing apparatus

Claim 1

IN AN APPARATUS FOR FORMING PACKAGES, THE COMBINATION OF MEANS FOR FORMING A CONTINUOUS TUBULAR SECTION OF HEAT SEALABLE MATERIAL, AND TRANSPORTING MEANS FOR MOVING SAID TUBULAR SECTION IN A LONGITUDINAL PATH, THE COMBINATION THEREOF WITH IMPROVED TRANSVERSE SEAL FROMING MEANS COMPRISING A PAIR OF ELONGATED TRANSVERSE SEALING BARS DISPOSED AT OPPOSITE SIDES OF SAID TUBULAR SECTION AND ARRANGED FOR ALTERNATIVE COACTING RELATIVE MOVEMENT IN OPPOSITE DIRECTIONS RELATIVE TO ONE ANOTHER AND TO SAID SECTION, SAID PAIR OF TRANSVERSE SEALING BARS BEING FURTHER ARRANGED FOR ALTERNATIVE MOVEMENT IN OPPOSED DIRECTIONS SUBSTANTIALLY PARALLEL WITH THE LONGITUDINALLY MOVABLE TUBULAR SECTION, HEATING MEANS FOR AT LEAST ONE OF SAID BARS, BAR ACTUATING MEANS, INCLUDING AN ELECTRIC CONTROL CIRCUIT THAT INITATES BAR MOVEMENT AND A CLUTCH OPERATED DRIVE RESPONSIVE TO THE CIRCUIT, FOR IMPARTING SAID COACTING RELATIVE MOVEMENT TO SAID BARS FOR APPLICATION OF TRANSVERSE PRESSURE AND HEAT SEALING TO SAID TUBULAR SECTION CONCURRENTLY WITH THE SAID LONGITUDINAL MOVEMENT THEREOF AND TO ALTERNATIVELY MOVE THE BARS IN THE SAID OPPOSED DIRECTIONS PARALLEL WITH THE MOVEMENT OF SAID SECTION, AND ADJUSTABLE CONTROL MEANS FOR SAID CONTROL CIRCUIT THAT PERIODICALLY TRIGGERS THE CONTROL CIRCUIT TO INITIATE THE CYCLIC ACTION OF SAID BARS INDEPENDENTLY OF THE TRANSPORTING MEANS FOR THE TUBULAR SECTION OF HEAT SEALABLE MATERIAL WHEREBY TRANSVERSE SEALS ARE MADE BY INTERMITTENT OPERATION OF THE TRANSVERSE SEAL FORMING MEANS.