Counter flow heat exchanger

Claim 1

A STATIONARY HEAT EXCHANGER FOR TRANSFERRING HEAT FROM A HIGH TEMPERATURE SOURCE OF HEAT TRANSFERRING FLUID FLOW TO A LOW TEMPERATURE SOURCE OF HEAT RECEIVING FLUID FLOW COMPRISING A CORE HAVING ONE END CONNECTED TO A FRONT HEADER AND THE OTHER END CONNECTED TO A REAR HEADER, A FIRST COLLECTOR CHAMBER HAVING HEAT RECEIVING FLUID OUTLET MEANS DISPOSED IN SAID FRONT HEADER ADJACENT ONE END OF SAID CORE AND A SECOND COLLECTOR CHAMBER HAVING HEAT TRANSFERRING FLUID OUTLET MEANS DISPOSED IN SAID REAR HEADER ADJACENT THE OTHER END OF SAID CORE, SAID CORE HAVING A CASING OF RCTANGULAR CROSS-SECTION AND A MATRIX, SAID MATRIX COMPRISING A PLURALITY OF SUPERPOSED CORRUGATED ELEMENTS POSITIONED IN LONGITUDINAL DIRECTION AND A LONGITUDINALLY DISPOSED PLATE POSITIONED CONTIGUOUS TO AND BETWEEN EACH OF SAID CORRUGATED ELEMETNS IN SEALED RELATION DEFINING A PLURALITY OF FIRST AND SECOND FLUID PASSAGES IN PARALLEL SUPERPOSED AND ADJACENT TRANSVERSE ALTERNATE RELATION, SAID FIRST FLUID PASSAGES BEING IN SEALED RELATION WITH RESPECT TO SAID SECOND FLUID PASSAGERS, SAID FIRST HEADER DEFINING A FIRST MAINFOLD HAVING HEAT TRANSFERRING FLUID INLET MEANS CONNECTED TO THE FORWARD END OF SAID FIRST COLLECTOR CHAMBER, SAID FIRST FLUID PASSAGES OF SAID MATRIX EXTENDING FORWARDLY THROUGH SAID FIRST COLLECTOR CHAMBER AND COMMUNICATIVELY CONNECTED TO SAIDFIRST MANIFOLD, SAID FIRST COLLECTOR CHAMBER HAVING A PLURALITY OF OPENINGS IN COMMUNICATION WITH SAID SECOND FLUID PASSAGES AND SAID HEAT RECEIVING FLUID OUTLET MEANS, SAID SECOND HEADER DEFINING A SECOND MANIFOLD HAVING HEAT RECEIVING FLUID INLET MEANS CONNECTED TO THE REARWARD END OF SAID SECOND