Packaging machine for erecting and sealing plastic coated paperboard containers

Claim 1

IN A MACHINE FOR ERECTING AND DEALING THE CLOSURE ELEMENTS OF CONTAINERS HAVING THERMOPLASTIC MATERIAL ON THE SURFACES THEREOF, EACH SAID CONTAINER HAVING AN END CLOSURE INCLUDING A PAIR OF OPPOSED OUTER CLOSURE FLAPS AND A PAIR OF OPPOSED INFOLDABLE TRIANGULAR PANELS, THE COMBINATION COMPRISING A MANDREL, MEANS FOR PRESENTING THE CONTAINER IN OPEN-ENDED TUBULAR FORM IN ALIGNMENT WITH SAID MANDREL, MOVABLE ABUTMENT MEANS FOR TELESCOPING SAID TUBULAR FORM CONTAINER OVER SAID MANDREL, A PAIR OF OPPOSED STEEPLE PLATES CONNECTED TO SAID MOVABLE ABUTMENT MEANS, SAID STEEPLE PLATES BEING DISPOSED FOR ENGAGEMENT WITH SAID OPPOSED CLOSURE FLAPS TO FOLD THE SAME INWARD AS AN INCIDENT TO TELESCOPING SAID CONTAINER OVER SAID MANDREL, A BRIDGE FIXED ADJACENT SAID MANDREL FOR REGISTRATION THEREWITH, A PAIR OF WINGS MOUNTED ON SAID BRIDGE FOR OSCILLATION RELATIVE TO SAID MANDREL AND DISPOSED FOR ENGAGEMENT WITH THE OPPOSED TRIANGULAR INFOLDABLE PANELS OF SAID CONTAINER IN COOPERATION WITH THE ACTION OF SAID STEEPLE PLATES, AND POWER MEANS ON SAID BRIDGE CONNECTED TO SAID WINGS AND ADAPTED TO ROCK THEM INTO ENGAGEMENT WITH SAID TRIANGULAR PANELS ALSO AS AN INCIDENT TO TELESCOPING SAID CONTAINER ON SAID MANDREL.