Apparatus for forming metallic casing liner

Claim 1

APPARATUS FOR PLACING A METALLIC LINEAR IN A SUBSTANTIALLY CYLINDRICAL METALLIC VESSEL COMPRISING A LONGITUDINALLY CORRUGATED TUBE OF MALLEABLE METAL, SAID TUBE HAVING AN EXTERNAL CROSS-SECTIONAL PERIMETER GREATER THAN THE INTERNAL CROSS-SECTIONAL CIRCUMFERENCE OF SAID VESSEL, AND THE THICKNESS OF THE WALL OF SAID TUBE TIMES THE MAXIMUM COMPRESSIVE STRENGTH OF THE METAL OF WHICH SAID TUBE IS MADE BEING LESS THAN THE THICKNESS OF THE WALL OF SAID VESSEL TIMES THE MAXIMUM TENSILE STRENGTH OF THE METAL OF WHICH SAID VESSEL IS MADE, A GLASS FIBER MAT SURROUNDING SAID TUBEM SAID MAT BEING SATURATED WITH A LIQUID RESIN CAPABLE OF BEING SET TO A HARDENED STATE, AND MEANS FOR EXPANDING SAID TUBE TO A SUBSTANTIALLY CYLINDRICAL FORM WITHIN SAID VESSEL WITHOUT IMPOSING A TENSILE STRESS IN THE WALL OF SAID VESSEL IN EXCESS OF THE MAXIMUM TENSILE STRENGTH, SAID MEANS FOR EXPANDING SAID TUBE INCLUDING MEANS FOR RESTRAINING LONGITUDINAL MOVEMEN OF SAID TUBE, AN EXPANDING ASSEMBLY HAVING A FIRST TUBE-EXPANDING HEAD AND A SECOND TUBE-EXPANDING HEAD, SAID FIRST TUBE-EXPANDING HEAD HAVING A GENERALLY CONICAL SOLID SURFACE WITH A MAXIMUM DIAMETER SUFFICIENT ONLY PARTIALLY TO EXPAND SAID TUBE AS SAID EXPANDING ASSEMBLY IS FORCED THROUGH SAID TUBE, AND SAID SECOND TUBE-EXPANDING HEAD HAVING A SET OF TUBE-EXPANDING ELEMENTS CAPABLE OF BEING FORCED RADIALLY OUTWARDLY OF THE FIRST HEAD IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE AXIS OF SAID TUBE, SAID ELEMENTS BEING CAPABLE OF MOVING INWARDLY TOWARD THE AXIS OF SAID TUBE UPON APPLICATION OF EXCESSIVE FORCE TO SAID ELEMENTS DURING THE EXPANSION OF SAID TUBE, MEANS FOR FORCING SAID TUBEEXPANDING ELEMENTS OUTWARDLY AND MEANS FOR FORCING SAID EXPANDING ASSEMBLY THROUGH SAID TUBE.