Disposable fluted paperboard plates and method of making same
AssigneeGPCP IP Holdings LLC
InventorsMark B. Littlejohn, Michael A. Breining, Larry A. Mejeur
Life of this patent
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Abstract
A paperboard plate such as a paper plate includes a generally planar bottom portion, an upwardly and outwardly extending fluted sidewall, wherein the sidewall comprises a plurality of sidewall flutes substantially around the outer perimeter of the plate to define a fluted perimeter. The flutes are suitably present at fewer than 3.5 flutes per inch; the plate has a radial profile with a single transition; and the diameter/flute length ratio is greater than 6. The plates are formed in a punch-through die cutting and forming tool from a plurality of paperboard web layers at increased productivities as compared with conventional heated press-forming.
Claims27
A paperboard plate formed from a paperboard blank, comprising:
- a bottom portion;
- an upwardly and outwardly extending fluted sidewall portion, wherein the sidewall portion comprises a plurality of flutes arranged substantially around an outer perimeter of the bottom portion to define a fluted perimeter, wherein the flutes are present at fewer than about 3.5 flutes per inch of the fluted perimeter;
- a radial profile having a single transition of about 15° to about 50° disposed between the bottom portion and the sidewall portion;
- and
- a plate diameter to flute length ratio of greater than about 6, wherein the plate has a basis weight of greater than 75 pounds per ream.
A plate formed from a paperboard blank, comprising:
- a central portion;
- a sidewall extending from the central portion;
- a radial profile having a single angular transition disposed between the central portion and the sidewall, wherein:
- the angular transition is of about 15° to about 50°;
- the sidewall comprises less than about 3.5 flutes per inch,
- the plate has a basis weight of greater than 75 pounds per ream, and
- the plate has a ratio of the central portion diameter to flute length greater than about 6.
A plate formed from a paperboard blank, comprising:
- a central portion;
- a sidewall extending from a perimeter of the central portion;
- a single angular transition of from about 15° to about 60° disposed between the central portion and the sidewall;
- at least one inflection disposed on the sidewall;
- and
- of from about 40 to about 80 flutes disposed on the side wall at less than about 3.5 flutes per inch, wherein:
- the sidewall has no pleats;
- the central portion diameter is about 9 inches;
- a ratio of the central portion diameter to flute length is greater than about 6;
- and
- the plate has a basis weight of greater than about 75 pounds per ream.
Dependencies are inferred from the claim text.