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AssigneeFort James Corporation
InventorsMichael A. Breining, William R. Pucci, David C. Brown, Richard A. Segan, Donald C. McCarthy, Walter Malakhow
Estimating the term…
A heat insulating paper cup having an improved seal. The cup can include a body member having an inside surface and an outside surface, and a bottom panel member having a upper surface and a bottom surface. The body member is coated (or in some instances partially coated) on its outside surface with a foamed low density polyethylene, and on its inside surface with an unfoamed modified low density polyethylene. The bottom panel member is coated on its upper surface with a foamed or an unfoamed low density polyethylene or foamed or unfoamed modified low density polyethylene. The body member and bottom panel member are oriented and joined to form a heat seal at an interface between a portion of the unfoamed modified low density polyethylene coated on the inside surface of the body member and a portion of unfoamed low density polyethylene or unfoamed modified low density polyethylene coated on the upper surface of the bottom panel member.
A heat-insulating paper container fabricated from a body member of paper having an inside surface laminate of a polyethylene component effective to prevent penetration of liquid into the paper during use and an outside surface laminate of foamed low density polyethylene, said body member bonded to a bottom panel member having an upper surface and a bottom surface, 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° to about 460° C. and a bottom expansion pressure set at about 3000 kilopascals for two revolutions per cup.
A heat-insulating paper container comprising a body member having an inside surface and an outside surface, and a bottom panel member having a upper surface and a bottom surface, said body member coated on its outside surface with a foamed low density polyethylene, and on its inside surface with an unfoamed modified low density polyethylene, and said bottom panel member coated on at least its upper surface with a low density polyethylene or modified low density polyethylene, wherein said body member and bottom panel member are oriented and joined to form a heat seal at an interface between a portion of the unfoamed modified low density polyethylene coated on the inside surface of the body member and a portion of the low density polyethylene or the modified low density polyethylene coated on the upper surface of the bottom panel member, and wherein the modified low density polyethylene is selected from materials effective to provide an improved seal between the bottom panel member and the body member of a twelve ounce cup fabricated at a speed of 165 cups/minute by a HORAUF MODEL BMP-200 machine with temperature controls set at between about 350° to about 460° C. and a bottom expansion pressure set at about 3000 kilopascals for two revolutions per cup.
Dependencies are inferred from the claim text.