Self-adjusting airtight door

Claim 1

A COKE OVEN COMPRISING AN OUTER METAL PROTECTING PLATE, A DOOR CASING HAVING A CONCAVE CURVATURE TOWARD THE INSIDE OF SAID OVEN SECURED TO SAID PLATE BY FASTENING MEANS, SAID FASTENING MEANS COMPRISING A PLURALITY OF ADJUSTING NUTS AND BOLTS COOPERATING WITH SAID PLATE TO ADJUST THE CURVATURE OF SAID CASING, AN INNER AND AN OUTER BEARING SURFACE FORMED ON SAID DOOR CASING, A DOOR HAVING A CONCAVE CURVATURE TOWARD THE INSIDE OF SAID OVEN ENGAGING SAID DOOR CASING, SAID DOOR INCLUDING VERTICAL BARS, A FLEXIBLE PLATE RIGIDLY CONNECTED TO SAID BARS, VERTICALLY SPACED MEMBERS ATTACHED TO SAID PLATE, AND A REFRACTORY LINING SUPPORTED BY SAID SPACED MEMBERS, ATTACHING MEANS LOCATED AT THE UPPER END OF SAID DOOR, CLAMPING MEANS LOCATED AT THE LOWER END OF SAID DOOR, SAID CLAMPING MEANS FORCING SAID DOOR AGAINST SAID DOOR CASING THEREBY CAUSING THE FLEXIBLE PLATE ON SAID DOOR TO ASSUME THE CONFIGURATION OF SAID DOOR CASING, AND SEALING MEANS DISPOSED BETWEEN SAID DOOR AND DOOR CASING, SAID SEALING MEANS INCLUDING A FLEXIBLE SCREEN LOCKED IN SAID REFRACTORY LINNING AND ABUTTING AGAINST THE OUTER BEARING SURFACE OF SAID DOOR CASING, AND MEANS MOUNTED ON SAID FLEXIBLE PLATE FORCING SAID FLEXIBLE SCREEN AGAINST SAID OUTER BEARING SURFACE OF SAID DOOR CASING.