Insulation construction

Claim 1

A LOW BOILING LIQUEFIED GAS CONTAINER COMPRISING AN INNER VESSEL FOR HOLDING THE LIQUEFIED GAS; AN OUTER SHELL SURROUND SAID INNER VESSEL AND SPACED THEREFROM SO AS TO FORM AN INTERVENING VACUUM SPACE; AN EVAPORATION GAS CONDUIT BETWEEN SAID INNER VESSEL AND SAID OUTER SHELL FOR TRANSPORTING SUCH GAS FROM THE CONTAINER AND HAVING A TEMPERATURE GRADIENT ACROSS SAID VACUUM SPACE; A COMPOSITE MULTI-LAYERED INSULATION DISPOSED WITHIN SUCH SPACE COMPRISING LOW CONDUCTIVE MATERIAL AND RADIANT HEAT BARRIER MATERIAL; AT LEAST ONE THIN, NON-SELF-SUPPORTING FLEXIBLE HIGHLY CONDUCTIVE METAL SHIELD DISPOSED IN SAID VACUUM SPACE AND SURROUNDING SAID INNER VESSEL, SAID SHIELD BEING SUPPORTED ON BOTH SIDES BY SAID MULTILAYERED INSULATION AND SECURED TO SAID EVAPORATION GAS CONDUIT BY LOW THERMAL RESISTANC E MEANS AT A REGION WHERE THE TEMPERATURE IS LOWER THAN THE TEMPERATURE ASSUMED BY SAID SHIELD ABSENT THE SECURING SO AS TO TRANSFER HEAT FROM THE SHIELD TO THE GAS CONDUIT, SAID SHEILD BEING CONSTRUCTED OF MATERIAL HAVING THERMAL CONDUCTIVITY OF AT LEAST 5 B.TU./HR.FT.*F. AT 100*K. AND A THICKNESS OF 0.001-0.03 INCH.