Method and apparatus for applying bonding pressures of differing magnitudes to adjacent surfaces of a workpiece

Claim 1

THE METHOD OF PRODUCING AN INFLATABLE TOOL FOR APPLYING A PLURALITY OF DIFFERING PRESSURES TO SURFACES FOR ADHESIVE BONDING AND THE LIKE, COMPRISING THE STEPS OF CUTTING AN INTERNAL PATTERN OF FLEXIBLE-EDGED FLAT MATERIAL HAVING ONE NON-ADHERENT SURFACE, CUTTING A FIRST LAMINATE OF UNCURED VULCANIZABLE PLY MATRIAL OF SUBSTANTIALLY TWICE THE WIDTH OF SAID INTERNAL PATTERN, PLACING SAID INTERNAL PATTERN UPON AND WITHIN THE WIDTH OF SAID FIRST LAMINATE WITH SAID ADHERENT SURFACE AGAINST SAID FIRST LAMINATE SO AS TO LEAVE FIRST MARGINAL PORTIONS ALONG BOTH EDGES OF THE PATTERN, PLACING A FIRST FLAT PRESSURE BAG UPON SAID NON-ADHERENT SURFACE OF SAID INTERNAL PATTERN AT A PREDETERMINED LOCATION, FOLDING SAID FRIST MARGINAL PORTIONS FO SAID FIRST LAMINATE ALONG THE EDGES OF SAID FIRST PATTERN AND OVER SAID NON-ADHERENT SURFACE AND SAID FIRST FLAT PRESSURE BAG AND JOINING THE EDGES OF SAID FRIST LAMINATE, CUTTING A SECOND SIMILAR LAMINATE SUFFICIENTLY LARGER THAN SAID FIRST LAMINATE SO AS TO OVERLAP IT, PLACING THE JOINT OF SAID FRIST LAMINATE WITHIN THE WIDTH OF SAID SECOND LAMINATE SO AS TO LEAVE SECOND MARGINAL PORTIONS ON BOTH SIDES OF SAID INNERMOST LAYER, FOLDING SAID SECOND MARGINAL PORTIONS OVER SAID INNERMOST LAYER AND JOINING THE EDGES OF SAID SECOND MARGINAL PORTIONS, CLOSING BOTH ENDS OF THE LAYERS SO FORMED TO PROVIDE A SECOND PRESSURE BAG, INSERTING AIR INLETS AT THE ENDS OF SAID FIRST AND SECOND PRESSURE BAGS AND EXTENDING THROUGH THE RESPECTIVE INNERMOST LAYERS, AND VULCANIZING THE COMBINATION SO FORMED TO ADHERENTLY BOND SAID FIRST PRESSURE BAG TO THE INNERMOST LAYER OF SAID SECOND PRESSURE BAG.