Method of making a multi-layered vessel

Claim 1

IN A METHOD OF MAKING MULTI-LAYER VESSELS HAVING AN INSIDE LINER, THE STEPS OF APPLYING A PLURALITY OF SEGMENTS HAVING A SUBSTANTIALLY UNIFORM THICKNESS WITH A CROWN EXTENDING ALONG THE CENTER PORTION THEREOF IN PARALLEL RELATION TO THE INITIAL EDGE AND FINAL EDGE OF EACH SEGMENT AND A TRUNCATED SEGMENT HAVING AN INITIAL EDGE WITH THICKNESS SUBSTANTIALLY EQUAL TO THE THICKNESS OF SAID OTHER SEGMENTS AND INCREASING TO A FINAL EDGE HAVING A THICKNESS SUBSTANTIALLY TWICE THE THICKNESS OF SAID OTHER SEGMENTS, APPLYING SAID TRUNCATED SEGMENT AS ONE OF THE FIRST SEGMENTS APPLIED TO SAID VESSEL SO THAT TRUNCATED SEGMENT AND AT LEAST ONE OF SAID SEGMENTS OF UNIFORM THICKNESS EXTEND COMPLETELY AROUND SAID INNER OUTWARDLY THEREOF, THE CROWN OF SAID SEGMENT OF UNIFORM THICKNESS EXTENDING PARALLEL TO THE AXIS OF THE VESSEL, THEN APPLYING SAID SEGMENTS OF SUBSTANTIALLY UNIFORM THICKNESS IN SPIRAL FASHION TO THE MULTI-LAYER VESSEL BEING FORMED WITH THEIR CROWNS PARALLEL TO THE AXIS OF THE VESSEL TO BUILD UP A PLURALITY OF SEGMENT THICKNESS UNTIL THE DESIRED WALL THICKNESS OF THE VESSEL IS ATTAINED.