Method of forming polyethylene terephthalate foam plate
AssigneeReynolds Consumer Products, Inc.
InventorsThomas J. Hayes, James N. Gomoll
Life of this patent
Estimating the term…
Abstract
Method of forming a plate including providing a sheet of polyethylene terephthalate foam and thermoforming the polyethylene terephthalate foam into a plate. The plate comprising a bottom wall having an outer perimeter, an upper surface, and a lower support surface defining a horizontal reference plane. The plate further comprising a sidewall extending upwardly and outwardly from the outer perimeter at an angle “a” of between about 30° to about 35° relative to a vertical axis perpendicular to the horizontal reference plane. The plate further including a rim extending laterally outwardly from an upper edge of the sidewall and a turndown flange extending downwardly from an outer edge of the rim and terminating at a free end.
Claims27
A method of forming a container, comprising:
- providing a sheet of polyethylene terephthalate foam;
- forming the polyethylene terephthalate foam into a container comprising:
- a bottom wall having an outer perimeter, an upper surface, and a lower support surface defining a horizontal reference plane;
- a sidewall extending upwardly and outwardly from the outer perimeter at an angle “a” of between about 30° to about 35° relative to a vertical axis perpendicular to the horizontal reference plane along the entire outer perimeter;
- a rim extending laterally outwardly from an upper edge of the sidewall, the rim having a rim width “rw” defined laterally between the upper edge of the sidewall and an outer edge of the rim;
- and
- a turndown flange extending downwardly from an outer edge of the rim and terminating at a free end, the turndown flange having a turndown height “tdh” defined vertically between the outer edge of the rim and the free end, the ratio of the turndown height to the rim width (tdh:rw) being between about 1:0.7 and 1:8.3;
- wherein the container comprises a monolithic structure of polyethylene terephthalate foam.
A container comprising:
- a bottom wall having an outer perimeter, an upper surface, and a lower support surface defining a horizontal reference plane;
- a sidewall extending upwardly and outwardly from the outer perimeter at an angle “a” of between about 30° to about 35° relative to a vertical axis perpendicular to the horizontal reference plane along the entire outer perimeter;
- a rim extending laterally outwardly from an upper edge of the sidewall, the rim having a rim width “rw” defined laterally between the upper edge of the sidewall and an outer edge of the rim;
- and
- a turndown flange extending downwardly from an outer edge of the rim and terminating at a free end, the turndown flange having a turndown height “tdh” defined vertically between the outer edge of the rim and the free end, the ratio of the turndown height to the rim width (tdh:rw) being between about 1:0.7 and 1:8.3;
- wherein the container comprises a monolithic structure of polyethylene terephthalate foam.
Dependencies are inferred from the claim text.