Floating roof construction

Claim 1

A FLOATING ROOF CONSTRUCTION OF THE TYPE ADAPTED TO BE INSTALLED IN A STORAGE VESSEL HAVING A VERTICAL SHELL, COMPRISING A PLURALITY OF INDIVIDUALLY BUOYANT PAN-LIKE SECTIONS CONNECTED TOGETHER IN MECHANICAL AND VAPOR SEAL RELATION, EACH OF SAID SECTIONS HAVING A RELATIVELY FLAT BOTTOM IN ENGAGEMENT WITH THE LIQUID STORED IN SAID VESSEL, A WALL STRUCTURE EXTENDING UPWARDLY FROM THE EDGES OF THE BOTTOM, A FLANGE CONSTRUCTION EXTENDING INWARDLY FROM THE UPPER END OF SAID WALL STRUCTURE TOWARD THE CENTER OF THE SECTION; T-SHAPED GASKET SEALING MEANS HAVING FIRST PORTIONS EXTENDING VERTICALLY AND CONTINUOUSLY BETWEEN ADJACENT WALL STRUCTURES TO SPACE APART SAID SECTIONS, SAID T-SHAPED GASKET SEALING MEANS INCLUDING SECOND PORTIONS OVERLYING ALL PARTS OF THE ADJACENT FLANGE CONSTRUCTIONS, A PLURALITY OF RELATIVELY SMALL CLIP MEANS EXTENDING OVER THE SECOND PORTIONS OF SAID T-SHAPED GASKET MEANS,