Method for manufacturing large plastic jerry cans

Claim 1

METHOD FOR MANUFACTURING LARGE PLASTIC JERRY CANS FOR EASILY COMBUSTIBLE LIQUIDS COMPRISING A. INJECTION MOLDING TWO SLENDER TRUNCATED CONES CONFORMING TO THE SHAPE OF THE JERRY CAN FROM A SURFACE-STABILIZED, LOW-WARPAGE PLASTIC MATERIAL OF SURFACE RESISTANCE CONSIDERABLY BELOW 10**9 OHMS, FORMING HOLES IN THE TRUNCATED END-PORTIONS THEREOF, AND SMOOTH, OUTWARDLY-TURNED EDGE-PORTIONS THEREON, AND ROUGHENING THE INNER SURFACE THEREOF, B. PREHEATING THE TRUNCATED CONES, C. PLACING EACH TRUNCATED CONE ENTIRELY ENCLOSED IN A BLOW FORM HALF SECTION TO PROJECT INWARD AT THE LARGE FACE OF THE LARGE JERRY CAN TO BE MOLDED, D. POSITIONING HIGHLY DIFFUSION-TIGHT THERMOPLASTIC HOSE MATERIAL, AT LEAST 1 MM IN THICKNESS, BETWEEN SAID TRUNCATED CONES IN SAID BELOW FORM HALF SECTIONS. E. CLOSING THE BLOW FORM HALF SECTIONS WITH THE TRUNCATED CONES SPACED APART IN THE CLOSED POSITION OF SAID BLOW FORM HALF SECTIONS AND SAID HOSE MATERIAL FILLING THE SPACE BETWEEN SAID TRUNCATED END-PORTIONS IN THE CLOSED POSITION, F. BLOWING AND HEAT SEALING A LARGE CONTIGUOUS WALL OF SAID HOSE MATERIAL FROM THE INSIDE ONTO AND AROUND THE INTERIOR SURFACES OF THE TRUNCATED CONES WITH THE BELOW FORM HALVES CLOSED, SMOOTHLY TRANSITIONING THE EDGE-PORTIONS OF THE TRUNCATED CONES INTO THE HOSE MATERIAL, AND G. FASTENING THE TRUNCATED CONES TO EACH OTHER WITH THE BLOW MOLDED HOSE MATERIAL FILLING THE SPACE BETWEEN THE TRUNCATED END-PORTIONS OF THE CONES BY FORMING RIVET-LIKE MEANS THROUGH THE HOLES FORMED IN THE TRUNCATED ENDPORTIONS OF EACH CONE.