Manufacture of food container and the like from aluminum foil or other thin metallic material

Claim 1

A CONTAINER FORMED FROM AN ALUMINUM CONTAINING THIN SHEET OF FROM 0.0015 TO 0.006 INCH IN THICKNESS AND HAVING AT LEAST ONE CUP-SHAPED COMPARTMENT FORMED THEREIN AND DEFINED BY DRAWING CRITICAL BENDS IN SAID SHEET TO PRODUCE INTGEGRAL CONTINUOUS SIDE WALLS OF SAID COMPARTMENT, SAID SHEET BEING EMBOSSED AND WORK HARDENED TO THE DESIRED DEGREE WITH AN OMMI-DIRECTIONAL STRETCH EMBOSSING PATTERN INCLUDING A PLURALITY OF CLOSELY FORMED, NARROW UNDULATIONS ADJACENT EACH OTHER, SAID UNDULATIONS CAUSING SAID SHEET TO HAVE AN APPARENT THICKNESS IN THE ORDER OF 130% TO 200% OF THE THICKNESS OF THE UNEMBOSSED SHEET SAID SHEET BEING STRETCHED AT THE CRITICAL BENDS OF SAID CONTAINER WITHOUT SUBSTANTIAL CHANGE IN THE ACTUAL CROSS-SECTIONAL THICKNESS OF SAID SHEET.