Evacuated coffee package

Claim 1

AN EVACUATED PACKAGE OF ROASTED AND GROUND COFFEE, SAID PACKAGE COMPRISING A CYLINDRICAL CONTAINER BODY, CLOSURE MEMBER FOR ITS ENDS, AND A MASS OF ROASTED AND GROUND COFFEE IN SAID CONTAINER BODY, ONE OF SAID CLOSURES BEING FORMED OF A CONTINUOUS SHEET OF FLEXIBLE RELATIVELY LIGHT-GAUGE METAL HAVING AN UPSTRUCK ANNULAR TOROIDAL PORTION AND A SURROUNDING MARGINAL PORTION, SAID TWO PORTIONS BEING CONNECTED BY INTERPOSED ANGULARLY RELATED WALLS FORMING A GROOVE OF APPROXIMATELY V-SHAPED CROSSSECTION EXTENDING ANNULARLY AROUND SAID TOROIDAL PORTION, AND A SUBSTANTIALLY PLANE CENTRAL DISC PORTION JOINED TO THE SURROUNDING TOROIDAL PORTION ALONG A BEND AT THE INNER CIRCUMFERENCE OF SAID TOROIDAL PORTION, SAID MARGINAL PORTION BEING SEALED TO THE END OF SAID BODY AND SAID CENTRAL DISC PORTION BEING DEPRESSED BELOW ITS INITIAL LEVEL RELATIVE TO SAID MARGINAL PORTION WITH FLEXING OF SAID BLENDS AND INCREASE OF THE ANGLE BETWEEN THE WALLS OF SAID GROOVE AS THE RESULT OF EVACUATION OF THE CONTAINER, SAID DEPRESSED CENTRAL PORTION CONTACTING AND COMPRESSING SAID MASS OF GROUND COFFEE INTO A SUBSTANTIALLY RIGID BODY FILLING SAID CONTAINER IN SUPPORTING CONTACT WITH ITS SIDE AND END WALLS, SAID SHEET HAVING THE APPROXIMATE FLEXIBILITY OF 75 POUND TIN PLATE STEEL AND THE ANGLE BETWEEN THE WALLS OF SAID GROOVE BEING INCREASED WITH ACCOMPANYING FLEXURE OF THE METAL AROUND THE BOTTOM OF THE GROOVE BEYOND ITS CAPACITY TO RETURN SAID WALLS TO THEIR ORIGINAL ANGULAR RELATION IN THE ABSENCE OF DIFFERENTIAL PRESSURE ON SAID END.