Patent ID: 6129653
Filing Date: 2000-10-10
Classification: B29C,B31B,B32B,B65D,Y10S,Y10T

Abstract:
A method for fabricating a heat insulating paper container from a paper-based body member with an inside surface and an outside surface, and a paper-based bottom panel member with an upper surface and a bottom surface, said method comprising:applying to the inside surface of said body member an inside surface laminate of a polyethylene component effective to prevent penetration of liquid into the paper during use, and applying to said outside surface an outside surface laminate of foamable low density polyethylene, wherein the inside surface laminate is selected from a material effective to form an improved seal between the bottom panel member and the body member of a twelve ounce cup fabricated at a speed of about 165 cups/minute by a HORAUF MODEL BMP-200 machine with temperature controls set at between about 350.degree. to about 460.degree. C. and a bottom expansion pressure set at about 3000 kilopascals for two revolutions per cup; andfabricating said container so that said body member is bonded to said bottom panel member, and said outside surface laminate of low density polyethylene is foamed.