Roller head for cement pipe forming

Claim 1

A ROLLER HEAD COMPRISING: (A) A TROWELING CYLINDER HAVING A CYLINDRICAL SKIRT PROVIDED WITH INREACHING LUGS ADJACENT THE UPPER END THEREOF, (B) A HEAD PLATE ACROSS THE UPPER END OF SAID CYLINDER AND BOLTED TO THE LUGS THEREOF, VENTING HOLES BEING PROVIDED IN SAID PLATE TO VENT THE INTERIOR OF THE CYLINDER DURING VERTICAL MOVEMENT THEREOF IN A FORM LINER TO FORM A TUBULAR CONCRETE WALL IN SAID LINER, (C) A SHAFT COAXIAL WITH THE CYLINDER EXTENDING VERTICALLY UPWARD FROM SAID HEAD PLATE, SAID SHAFT BEING BOTH ROTATIONAL TO ROTATE THE HEAD PLATE AND THE CYLINDER BOLTED THERETO AND VERTICALLY MOVABLE TO MOVE THE CYLINDER UPWARDLY TO FORM SAID TUBULAR CONCRETE WALL, (D) A PLURALITY OF ECCENTRICALLY ADJUSTABLE ROLLER PACKER UNITS ON VERTICAL AXES IN SPACED SYMMETRICAL CIRCUMFERENTIAL ARRANGEMENT MOUNTED ON AND EXTENDING UPWARDLY FROM SAID HEAD PLATE TO ROLL AGAINST THE INNER FACE OF THE MENTIONED TUBULAR CONCRETE WALL TO PACK THE SAME TIGHTLY AGAINST THE FACE OF THE PIPE FORM LINER, (E) AN AGGREGATE SPREADER PLATE AFFIXED TO SAID SHAFT, SPACED ABOVE THE HEAD PLATE AND PROVIDED WITH PERIPHERAL RECESSES INTO WHICH THE UPPER ENDS OF SAID UNITS EXTEND AND HAVING SPACED RELATION WITH THE ROLLER PACKER UNITS TO BE CLEAR THEREOF IN ALL ECCENTRIC ADJUSTMENTS OF SAID UNITS,