Machine for forming, filling, closing and sealing plastic coated paperboard containers

Claim 1

IN A CARTON FORMING MACHINE FOR THERMOPLASTIC COATED BLANKS OF PAPERBOARD OR THE LIKE HAVING END CLOSURE PANELS DEFINED THEREIN, THE COMBINATION COMPRISING, FIXED SUPPORT MEANS, AN ASSEMBLY OF MANDRELS JOURNALED ON SAID SUPPORT MEANS AND MOVABLE ABOUT A FIXED AXIS, EACH MANDREL BEING ADAPTED TO CARRY A BLANK, SAID MANDRELS BEING RADIALLY DISPOSED IN A COMMON PLANE AXIALLY SPACED FROM SAID SUPPORT MEANS AND NORMAL TO SAID FIXED AXIS, A PLURALITY OF HEATERS DISPOSED FOR REGISTRATION SEQUENTIALLY WITH THE END OF EACH MANDREL TO HEAT THE BLANK BOTTOM CLOSURE PANELS ON THE MANDREL, MEANS DEFINING A FLUID COOLANT PASSAGE IN EACH MANDREL END FACE TO PRECLUDE ADHESION OF THE HEATED THERMOPLASTIC COATED BLANK BOTTOM CLOSURE PANELS, COOLANT CIRCULATING CONDUITS CARRIED BY EACH SAID MANDREL FOR CONVEYING COOLANT TO AND FROM SAID MANDREL PASSAGE, MEANS FOR CIRCULATING FLUID COOLANT FROM A SOURCE THROUGH SAID CONDUITS AND SAID MANDREL PASSAGES COMPRISING A FLUID COOLANT SLIP-RING FIXED BETWEEN SAID SUPPORT AND SAID COMMON PLANE OF SAID MANDRELS, SAID RING HAVING SUPPLY AND RETURN GROOVES CONNECTED TO SAID COOLANT SOURCE, A PLATE ENGAGING SAID RING ADJACENT SAID GROOVES AND MOVABLE WITH SAID MANDREL, AND COOLANT CONNECTIONS FROM SAID SUPPLY AND RETURN GROOVES THROUGH SAID PLATE TO SAID CONDUITS RESPECTIVELY.