Investment mixer with enlarged mold supporting platform

Claim 1

IN A MIXER OF THE CLASS DESCRIBED THE COMBINATION OF A CONTAINER, A COVER FOR THE CONTAINER, A ROTATABLE MIXING BLADE WITHIN THE CONTAINER, A SHAFT ROTATABLY CARRIED BY THE COVER PROJECTING INTO THE CONTAINER AND HAVING CONNECTED THEREWITH THE MIXING BLADE, SAID COVER AND CONTAINER BEING SUBSTANTIALLY COEXTENSIVE IN AREA IN PLAN, A SUPPORTING PLATFORM CARRIED BY THE COVER HAVING A PORTION THEREOF OVERLYING THE COVER AND A PORTION EXTENDING BEYOND THE COVER, SAID OVERLYING PORTIONS OF THE PLATFORM AND COVER HAVING FORMED THERETHROUGH A DISCHARGE OPENING FROM THE CONTAINER WHEREFORE SAID OPENING IS ECCENTRIC TO THE COVER AND PLATFORM, SAID PLATFORM HAVING A CONCENTRIC RECESS AND A BOSS SUBSTANTIALLY CONCENTRIC WITH THE DISCHARGE OPENING, UPSTANDING FROM SAID RECESS BOTTOM, A COMPRESSIBLE MEMBER IN SAID PLATFORM RECESS RADIALLY OF THE BOSS AND A MOLD FORMING RING INCLUDING A WALL OF APPRECIABLE THICKNESS AND HAVING ONE END CLOSED TO SUPPORT A PATTERN WITHIN THE RING, SAID RING HAVING ITS OTHER END OPEN AND SAID RING HAVING AN INTERNAL DIAMETER GREATER THAN THE DIAMETER OF THE DISCHARGE OPENING BOSS AND AN EXTERNAL DIAMETER SMALLER THAN THE PLATFORM RECESS WITH ITS OPEN END DISPOSED ON SAID COMPRESSIBLE MEMBER WITH SAID OPEN END INTERNAL DIAMETER RECEIVING THE PLATFORM DISCHARGE OPENING BOSS AND THE RING OUTSIDE DIAMETER WITHIN THE PLATFORM RECESS.