Method of forming a container from a flexible laminate of foamed polystyrene

Claim 1

THE METHOD FORM FORMING A FLEXIBLE LAMINATE OF FOAMED POLYSTYRENE SHEET MATERIAL ADHERED TO A SHEET OF ORGANIC MATERIAL, WHICH COMPRISES: EXTRUDING FOAMABLE POLYSTYRENE THROUGH A PERIPHERALLY SLOTTED NOZZLE TO FORM A SEAMLESS TUBE THRERFROM WHILE DIRECTING A PRESELECTED QUANTITY OF GAS UNDER PRESSURE THROUGH AN ORIFICE LOCATED CENTRALLY OF SAID NOZZLE AND INTERIORLY OF SAID EAMLESS TUBE WHILE THE LATTER IS BEING FORMED, THUS FORMING AN EXPANDED, STRETCHED AND INFLATED TUBE OF FOAMED, FLEXIBLE POLYSTYRENE SHEET OF AT LEAST SEVERAL THOUSANDTHS OF AN INCH IN THICKNESS HAVING ON ITS OPPOSITE SURFACES A CONTIMUOUS INTEGRAL SKIN, SAID POLYSTYRENE SHEET CONTAINING THROUGHOUT BETWEEN SAID SKIN SURFACES A MULTITUDE OF CLOSED CELLS; CONTINUOUSLY APPLYING PRESSURE TO OPPOSITE OUTER SIDES OF SAID TUBE TO COLLAPSE AND FLATTEN SAME AT A SQUEEZE ZONE TO BRING INTO ENGAGEMENT OPPOSITE INTERIOR SURFACES OF SAID TUBE TO FORM TWO ADJACENT OOLYSTYRENE SHEETS JOINTED ALONG THEIR SIDES; CONTINUOUSLY BONDING AT LEAST ONE PLY OF SAID SHEET OF ORGANIC MATERIAL TO ONE OF THE SURFACES OF THE FLATTENED TUBE AND CUTTING SAID TUBE ALONG OPPOSITE EDGES THEREBY TO MAKE SEPARABLE SAID ADJACENT POLYSTYRENE SHEETS.

Claim 2

THE METHOD FORM FORMING A FLEXIBLE LAMINATE OF FOAMED POLYSTYRENE SHEET MATERIAL ADHERED TO A SHEET OF ORGANIC MATERIAL, WHICH COMPRISES: EXTRUDING FOAMABLE POLYSTYRENE THROUGH A PERIPHERALLY SLOTTED NOZZLE TO FORM A SEAMLESS TUBE THRERFROM WHILE DIRECTING A PRESELECTED QUANTITY OF GAS UNDER PRESSURE THROUGH AN ORIFICE LOCATED CENTRALLY OF SAID NOZZLE AND INTERIORLY OF SAID EAMLESS TUBE WHILE THE LATTER IS BEING FORMED, THUS FORMING AN EXPANDED, STRETCHED AND INFLATED TUBE OF FOAMED, FLEXIBLE POLYSTYRENE SHEET OF AT LEAST SEVERAL THOUSANDTHS OF AN INCH IN THICKNESS HAVING ON ITS OPPOSITE SURFACES A CONTIMUOUS INTEGRAL SKIN, SAID POLYSTYRENE SHEET CONTAINING THROUGHOUT BETWEEN SAID SKIN SURFACES A MULTITUDE OF CLOSED CELLS; CONTINUOUSLY APPLYING PRESSURE TO OPPOSITE OUTER SIDES OF SAID TUBE TO COLLAPSE AND FLATTEN SAME AT A SQUEEZE ZONE TO BRING INTO ENGAGEMENT OPPOSITE INTERIOR SURFACES OF SAID TUBE TO FORM TWO ADJACENT OOLYSTYRENE SHEETS JOINTED ALONG THEIR SIDES; CONTINUOUSLY BONDING AT LEAST ONE PLY OF SAID SHEET OF ORGANIC MATERIAL TO ONE OF THE SURFACES OF THE FLATTENED TUBE AND CUTTING SAID TUBE ALONG OPPOSITE EDGES THEREBY TO MAKE SEPARABLE SAID ADJACENT POLYSTYRENE SHEETS.