Apparatus and procedure for making expanded resinous containers

Claim 1

IN APPARATUS FOR COMPLETELY AND QUICKLY EXPANSIONFORMING AND SHAPING A COMPOSITE LIGHTWEIGHT CONTAINER OF EXPANDED RESIN BEAD CONSTRUCTION HAVING SURFACE SKIN PORTIONS OF DIFFERENT FINISH OF WHICH ONE SKIN PORTION IS MORE SHINY AND SMOOTH THAN THE OTHER, THE COMBINATION OF INTERFITITNG INNER AND OUTER MOLD PARTS HAVING WALL SURFACES DEFINING AN ENCLOSED INNER MOLD CAVITY FOR RECEIVING PRE-EXPANDED RESIN BEADS THEREIN, A FIRST OF SAID MOLD PARTS HAVING A DOWNWARDLY-OFFSET PORTION DEFINING A LIQUID-RECEIVING RESERVOIR THEREIN THAT IS OPEN UPWARDLY TO THE MOLD CAVITY, SAID FIRST MOLD PART HAVING A WALL OF HIGH ELECTRICALLY-CONDUCTIVE MATERIAL, A SECOND OF SAID MOLD PARTS HAVING A WALL OF A MATERIAL OF RELATIVELY POOR ELECTRICAL CONDUCTIVITY, AN ELECTRICAL INDUCTION COIL POSITIONED EXTERNALLY ABOUT SAID MOLD PARTS AND HAVING MEANS QUICKLY-DIRECTLY INDUCING SUBSTANTIAL HEAT ENERGY IN THE WALL OF SAID FIRST MOLD PART AND VAPORIZING LIQUID IN ITS RESERVOIR INTO STEAM TO THEREBY QUICKLY HEAT AND EXPANSION-FORM THE PRE-EXPANDED RESIN BEADS IN THE MOLD CAVITY INTO A FINISHED ARTICLE, AND SAID MEANS IN COMBINATION WITH THE WALL MATERIALS OF SAID FIRST AND SECOND MOLD PARTS BEING CONSTRUCTED AND POSITIONED TO INHIBIT DIRECTLY INDUCED HEAT IN THE WALL MATERIAL OF SAID SECOND MOLD PART AND PROVIDE A SUFFICIENT CONDUCTED HEAT DIFFERENTIAL ON THE MOLDING CAVITY DEFINING WALL SURFACE THEREOF WITH RESPECT TO THE MOLD CAVITY DEFINING WALL SURFACE OF SAID FIRST MOLD PART SO AS TO FORM A MORE SHINY AND SMOOTH SURFACE SKIN PORTION ON THE ARTICLE THAT IS IN AN ABUTTING RELATION WITH RESPECT TO THE MOLD CAVITY DEFINING WALL SURFACE OF SAID FIRST MOLD PART THAN THE SURFACE SKIN PORTION ON THE ARTICLE THAT IS IN AN ABUTTING RELATION WITH RESPECT TO THE MOLD CAVITY DEFINING WALL SURFACE OF SAID SECOND MOLD PART.