Title: Nesting insulated hot-or-cold food tray

Abstract: An integral tray structure of expanded substantially rigid plastic foam material, typically polystyrene foam is formed to have a bottom plate surface, an upstanding surrounding, inclined rim and a laterally projecting flange formed on the rim, the flange having, around its periphery, spaced projections, and recess means which are so arranged that, upon inversion of a tray structure above another tray structure, a hollow, insulated chamber, to contain hot or cold food, is formed. The projecting and recess means can be used to lock the tray structures together, and the inclined rims permitting nesting of the tray structures within each other, for minimum space requirements of the tray structures themselves for transportation and storage. The projecting-recess means may be formed as tabs engaging notches, or perpendicularly projecting buttons engaging matching cut-outs.

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Inventors: Holden, Jr., Morell J. (Canandaigua, NY, US)
LeBoutillier, Frank (Canandaigua, NY, US)

Application Number: 481095
Filing Date: 1974-06-20
Publication_date: 1976-02-17
Assignee: Mobil Oil Corporation (New York, NY)
Primary Class(es): 229/406 229/103.11, D7/605, D9/426
Other Classes:
US Patent Ref:

1748911	Feb, 1930	Chaplin	229/2.
1945397	Jan, 1934	Gray	229/2.
2915214	Dec, 1959	Frankel	229/3.
3342397	Sep, 1967	Duitsman	229/2.
3442433	May, 1969	Lombardi et al.	229/2.
3511433	May, 1970	Andrews et al.	229/2.
3786982	Jan, 1974	Rakes et al.	229/2.

Other Refs: 1,127,487

Sep, 1968	UK

Primary Examiner: Moorhead, Davis T.
Assistant Examiner:
Attorney: Huggett; Charles A.