Spring unit construction

Claim 1

A SPRING UNIT CONSTRUCTION COMPRISING A SET OF COIL SPRINGS ARRANGED IN A RECTANGULAR PATTERN IN LONGITUDINAL COLUMNS AND TRANSVERSE ROWS, THE END CONVOLUTES OF THE SPRINGS BEING DISPOSED WITHIN AND DEFINING FIRST AND SECOND PARALLEL SUPPORT PLANES, FIRST AND SECOND SUBSTANTIALLY RECTANGULAR BORDER FRAMES DISPOSED IN SAID FIRST AND SECOND SUPPORT PLANES RESPECTIVELY, EACH FRAME HAVING EDGE PORTIONS AND END PORTIONS EXTENDING ALONG THE OUTER EDGES OF THE END CONVOLUTES OF THE COIL SPRINGS IN THE TERMINAL TRANSVERSE ROWS AND THE TERMINAL LONGITUDINAL COLUMNS RESPECTIVELY, MEANS IN SAID FIRST AND SECOND SUPPORT PLANES FOR TYING THE END CONVOLUTES OF THE LONGITUDINALLY AND TRANS VERSELY ADJACENT COILS TOGETHER, AT LEAST ONE CONTINUOUS CLOSE-FIGURE REINFORCING MEMBER HAVING A PAIR OF RECTILINEAR SIDE PORTIONS AND A PAIR OF INTEGRAL INTERMEDIATE PORTIONS INTERCONNECTING THE CORRESPONDING ENDS OF SAID SIDE PORTIONS SAID REINFORCING MEMBER SIDE PORTIONS BEING SHORTER THAN AND DISPOSED CENTRALLY IN SUPERPOSED RELATION WITH RESPECT TO THE EDGE PORTIONS OF ONE OF SAID BORDER FRAMES, EACH REINFORCING MEMBER INTERMEDIATE PORTION EXTENDING ACROSS THE ADJACENT CORNERS OF SAID ONE BORDER FRAME INTO SUPERPOSED RELATION WITH A CENTRALLY DISPOSED LENGTH OF THE ADJACENT END PORTION OF SAID FRAME, AND TIE WIRES HELICALLY ENCIRCLING AND INTERCONNECTING SAID BORDER FRAMES, THE SUPERPOSED SIDE AND INTERMEDIATE PORTIONS OF SAID REINFORCING MEMBERS AND THE OUTER EDGES OF SAID END CONVOLUTES IN THE TERMINAL TRANSVERSE ROWS AND LONGITUDINAL COLUMNS.