Leak-proof joint structures

Claim 1

A JOINT STRUCTURE BETWEEN ADJACENT MEMBERS, EACH OF SAID MEMBERS BEING MARGINALLY PROFILED TO PROVIDE, ON MARGINAL EDGE JOINT ASSEMBLY THEREBETWEEN, A WALL SURFACE IN OPPOSITELY DISPOSED TRANSVERSELY SEPARATED RELATIONSHIP CONSTITUTING AN AXIALLY EXTENDING CHANNEL ENTRANCE TO A LATERALLY EXPANDED CAVITY BELOW SAID CHANNEL ENTRANCE, A WALL AREA OF SAID CAVITY REMOTE AND OPPOSITE TO THE CHANNEL ENTRANCE THERETO HAVING AN UPSTANDING AXIALLY EXTENDING ABUTMENT IN SUBSTANTIAL ALIGNMENT WITH THE AXIS BISECTING THE TRANSVERSE WIDTH OF THE CHANNEL ENTRANCE, SAID ABUTMENT HAVING AN UPWARDLY DIRECTED SURFACE LOCATED BELOW A TRANSVERSE PLANE DEFINING COPLANAR WALL AREAS OF THE CAVITY, ONE EACH OF SAID COPLANAR WALL AREAS BEING CONTIGUOUS WITH AND ANGULARLY DISPOSED TO ONE EACH OF THE WALL SURFACES CONSTITUTING THE ENTRANCE CHANNEL TO SAID CAVITY, A DEFINING WALL OF THE CAVITY INCORPORATING OVERLYING CONTACTING SURFACES AREAS INCLUDING AT LEAST ONE SURFACE AREA OF ONE OF THE MEMBERS OF SAID JOINT STRUCTURE, SAID OVERLYING CONTACTING SURFACE AREAS BEING PERMEABLE TO VAPOR AND MOISTURE LEAKAGE INTO AND OUT OF SAID CAVITY; AN ELONGATE RESILIENT MOISTURE AND VAPOR SEALING STRIP OF AXIALLY UNIFORM TRANSVERSE CROSSSECTION COMPRISING A STEM PORTION AND LATERALLY EXTENDING HEAD PORTION CARRIED THEREBY, SAID SEALING STRIP RESPONDING UNDER APPLIED PRESSURE TO DISPLACEABLE TRANSFORMATION WITHIN ITS ELASTIC LIMIT TO FORCIBLE ENTRANCE HEAD-FIRST THROUGH THE CHANNEL ENTRANCE TO POSITION THE HEAD PORTION THEREOF WITHIN SAID CAVITY IN COMPRESSIVE ABUTTING CONTACT OF AN UNDERLYING SURFACE OF THE HEAD PORTION REMOTE TO SAID STEM PORTION AGAINST THE UPWARDLY DIRECTED SURFACE OF THE UPSTANDING ABUTTMENT UNDERLYING THE SAME WITH THE STEM PORTION OF THE SEALING STRIP IN COMPRESSIVE ENGAGEMENT WITH THE OPPOSITELY DISPOSED WALL SURFACES CONSTITUTING THE CHANNEL ENTRANCE, AND SAID HEAD PORTION OF THE SEALING STRIP PRESENTING COPLANAR LATERALLY OPPOSITELY OUTWARDLY EXTENDING SURFACES IN THE PLANE OF ATTACHMENT TO THE STEM PORTION THEREOF, ONE EACH OF SAID LATERALLY OPPOSITELY OUTWARDLY EXTENDING SURFACES BEING IN COMPRESSIVE SEALING CONTACT AGAINST ONE EACH OF THE OPPOSITELY DISPOSED COPLANAR WALL AREAS OF THE CAVITY ADJACENT THE CHANNEL ENTRANCE THERETO.