Aircraft hangar and door

Claim 1

A FLEXIBLE CLOSURE FOR AN OPENING DEFINED BY A HEAD MEMBER, A PAIR OF SPACED PARALLEL SIDE MEMBERS OR JAMBS, AND A BASE COMPRISING IN COMBINATION: (A) A FLEXIBLE CURTAIN DIMENSIONED TO COVER THE OPENING, AND HAVING PARALLEL TOP AND BOTTOM MARGINAL EDGES; (B) MEANS COACTING BETWEEN THE TOP MARGINAL EDGE OF SAID CURTAIN AND SAID HEAD MEMBER TO SECURE SAID CURTAIN TO SAID HEAD MEMBER; (C) A ROLLER SECURED TO THE BOTTOM MARGINAL EDGE OF SAID CURTAIN AND SUPPORTED SOLELY BY SAID CURTAIN AS IT MOVES TOWARD AND AWAY FROM SAID HEAD MEMBER; (D) GUIDE MEANS COACTING BETWEEN EACH EXTERMITY OF SAID ROLLER AND THE ADJACENT PARALLEL SIDE MEMBERS TO LIMIT LATERAL DISPLACEMENT OF SAID ROLLER IN A DIRECTION NORMAL TO THE PLANE OF THE CURTAIN; AND (E) DIRVING MEANS MECHANICALLY COUPLED TO AND COACTING DIRECTLY WITH SAID ROLLER AT AT LEAST ONE EXTREMITY FOR DIRECTLY APPLYING A ROTATIONAL FORCE THERETO TO DRIVE SAID ROLLER ALONG SAID CURTAIN.