Curtain wall metal window frame

Claim 1

A WALL PANEL RECEIVING FRAME COMPRISING A PAIR OF SPACED APART SIDE RAILS; A RIB ON EACH SIDE RAIL EXTENDING THEREALONG EACH HAVING A FREE EDGE DIRECTED ONE TOWARD THE OTHER, THE RIBS BEING IN A COMMON PLANE; A TOP AND A BOTTOM RAIL INTERPOSED RESPECTIVELY BETWEEN UPPER AND LOWER PORTIONS OF SAID SIDE RAILS; A RIB ON EACH OF SAID TOP AND BOTTOM RAILS EXTENDING THEREALONG EACH HAVING A FREE EDGE DIRECTED ONE TOWARD THE OTHER AND BEING IN SAID COMMON PLANE; SAID TOP AND BOTTOM RIBS BEING IN ABUTMENT BY END AREAS WITH AREAS OF OPPOSING EDGES OF SAID RIBS ON THE SIDE RAILS; MECHANICAL MEANS RIGIDLY INTERENGAGING SAID SIDE RAILS WITH SAID TOP AND BOTTOM RAILS MAINTAINING SAID ABUTMENTS OF ALL OF SAID RIBS; SAID ABUTTING AREAS, EACH HAVING SIDE-BY-SIDE PASSAGEWAYS THEREACROSS FORMING COMBINED UNITARY PASSAGEWAYS ACROSS THE ABUTMENTS, SAID PASSAGEWAYS BEING APPROXIMATELY CENTERED WITHIN SAID PLANE, AND OPEN AT EACH END; AND AN ELASTIC WATER SEALING AND METAL ADHERING MATERIAL ENTERED FROM ONE END OF AND FILLING UNDER PRESSURE EACH OF SAID PASSAGEWAYS FLOWED THERETHROUGH TO THE OPPOSITE ENDS OF THE PASSAGEWAYS, SAID MATERIAL ADHERING TO THE WALLS OF THE PASSAGEWAYS; ALL OF SAID RAILS AND RIBS BEING METAL.