Food tray and lid with sealed panels and method of forming same

Details Food tray and lid with sealed panels and method of forming same Food tray and lid with sealed panels and method of forming same

1979-09-17

1985-08-06

Lowrance, George E.

Receptacles

Sectional

Knockdown

220 76, 220 81R, 220359, 220469, 220902, 206545, B65D 632, A45C 1120

Patent

active

045330611

ABSTRACT:
An insulated food serving tray or lid therefore which includes a pair of preformed thermoplastic panels bonded together about a peripheral seam to permanently encase an insulator within a chamber between the panels. At the peripheral seam area, a first panel has an outwardly extending ledge area with a retaining lip. The second panel has a peripheral tongue area that fits inside the lip of the first panel. The panels are joined between the lip and tongue by a bonding material to provide a peripheral seam that is protected from fracture when the tray or lid is laterally banged at the peripheral seam area during handling. A method of forming the tray or lid is disclosed which includes forming the tray or lid with a gap between the insulation and panels at the time of assembly.

REFERENCES:
patent: 616929 (1899-01-01), Joans
patent: 2438546 (1948-03-01), Davis
patent: 2656946 (1953-10-01), Clarke
patent: 3016129 (1962-01-01), King
patent: 3215304 (1965-11-01), Roche
patent: 3454179 (1969-07-01), Kerr
patent: 3532247 (1970-10-01), Bridges
patent: 3613933 (1971-10-01), Pilz
patent: 3754640 (1973-08-01), Bridges
patent: 3799386 (1974-03-01), Madalin
patent: 3825148 (1974-07-01), Hunter
patent: 3828967 (1978-08-01), Grabhorn
patent: 3850333 (1974-11-01), Recihert
patent: 3928567 (1960-03-01), Davis

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