Composite sterilizable container

Claim 1

A SEALED CONTAINER WITH STERILIZED CONTENTS THEREIN COMPRISING A TRAY SECTION FORMED FROM A SINGLE PIECE OF FLEXIBLE SHEET MATERIAL MOLDED TO PRESENT A BOTTOM PORTION WITH STRAIGHT UPSTANDING WALL PORTIONS DISPOSED ALONG THE PERIPHERY OF THE BOTTOM PORTION, SAID STRAIGHT WALL PORTIONS BEING JOINED AT THEIR ENDS TO DEFINE WITH SAID BOTTOM PORTION A TRAY CAVITY DEVOID OF INGRESS CHANNELS AND ACCOMODATING SAID CONTENTS, FLANGES INCLUDING AS AN INNER PORTION THEREOF THE SAME SINGLE PIECE OF FLEXIBLE SHEET MATERIAL FORMED INTEGRAL WITH AND LOCATED AT THE TOP EDGES OF SAID WALL PORTIONS WITH JUNCTURES AT THEIR CONTIGUOUS END EDGES, AND INCLUDING ALSO AS AN OUTER PORTION OF SAID FLANGES AND INTEGRALLY BONDED WITH SAID INNER PORTIONS THEREOF, A THERMOPLATIC MEMBER MOLDED AS A CONTINUOUS INTEGRAL UNIT PRESENTING SUBSTANTIAL FLAT AREAS CONTIGUOUS TO CORRESPONDING AREAS OF THE INNER FLANGE PORTIONS AND EXTENDING ALL AROUND THE TRAY CAVITY, A COVER HEAT SEALED TO SAID OUTER THERMOPLASTIC FLANGE PORTION ALL AROUND SAID CAVITY TO CLOSE THE CONTAINER DURING STERILIZATION AND TO GUARD THE CONTENTS THEREOF FREE OF CONTAMINATION AFTER STERILIZATION, AND A THERMOPLASTIC MATERIAL INTERCONNECTING SAID FLANGES AT THE JUNCTURES OF THEIR CONTIGUOUS END EDGES AND SEALING THE CONTAINER AT SAID JUNCTURES, SAID THERMOPLASTICS MATERIAL FILLING UP COMPLETELY ALL OF THE SPACE AT THE JUNCTURES BETWEEN THE END ADGES OF THE FLANGES AND BEING INTEGRAL WITH AND FORMING PART OF SAID THERMOPLASTIC PORTION OF THE FLANGES, AND SAID COVER HAVING SUFFICIENT INTERNAL STRENGTH AFTER STERILIZTION TO PREVENT DELAMINATION AS SAID HEAT SEAL IS BROKEN BY A STRIPPING AWAY OF THE COVER FROM THE THERMOPLASTIC PORTION OF THE FLANGE WHEREBY THE ENTIRE SURFACE OF THE FLANGE OF THE PACKAGE UNCOVERED BY SAID STRIPPING AWAY IS IN A STERILE CONDITION AND FREE OF COVER FRAGMENTS.