Pressure seal for rotary drum reactors

Claim 1

APPARATUS COMPRISING A PAIR OF ADJACENT MEMBERS, AT LEAST ONE OF SAID MEMBERS BEING ROTATABLE WITH RESPECT TO THE OTHER, A SEALING FACE OF SUBSTANTIALLY CYLINDRICAL SHAPE FIXED TO ONE OF SAID MEMBERS, A SURFACE OF SUBSTANTIALLY CYLINDRICAL SHAPE FIXED TO THE OTHER MEMBER IN SPACED RELATION TO SAID SEALING FACE, SAID SEALING FACE AND SAID SURFACE FORMING AN ANNULAR NON-GASTIGHT PORT BETWEEN SAID MEMBERS AND BEING SO ARRANGED AS TO PERMIT UPON ROTATION, ECCENTRIC MOVEMENT BETWEEN SAID MEMBERS, AN ANNULAR GROOVE CUT INTO SAID SURFACE AND FORMED TO MOVABLY RECEIVE AND GUIDE AN ANNULAR BARRIER, AN ANNULAR METALLIC BARRIER IN SAID GROOVE MAINTAINED CONSTANTLY IN SLIDING CONTACT WITH THE SIDES OF SAID GROOVE, SAID BARRIER BEING SUFFICIENTLY SELF-EXTENSIBLE, IN A DIRECTION TOWARD SAID FACE AND SUBSTANTIALLY AT A RIGHT ANGLE TO THE AXIS OF SAID CYLINDRICAL SURFACE AND SEALING FACE TO NORMALLY EFFECT CONTACT WITH SAID SEALING FACE, AND PRESSURE MEANS TO SUPPLY LIQUID SEALING MEDIUM UNDER PRESSURE TO SAID GROOVE, BARRIER AND SEALING FACE THEREBY TO PREVENT SUBSTANTIAL FLOW OF GAS THROUGH SAID PORT.