Food container with interchangeable lid—base seal design

Details Food container with interchangeable lid—base seal design Food container with interchangeable lid—base seal design

2005-08-02

2005-08-02

Ngo, Lien (Department: 3727)

Receptacles

Closures

Removable closure situated by resilient distortion and...

C220S004240

Reexamination Certificate

active

06923338

ABSTRACT:
There is provided a container having both male and female sealing regions disposed about its periphery in a pattern making it possible to seal a container with another container having substantially identical sealing regions. The male sealing regions used in the practice of the present invention may take the form of a U-shaped ridge which is undercut along at least one leg of the U. Typically, a container will he thermoformed from lightweight thermoplastic material giving the U-shaped ridge considerable flexibility. The female sealing regions used in the practice of the invention may take the form of an undercut channel adapted to receive and match the undercut U-shaped ridges found in the male portion of the container wherein the walls and base of the channel are sufficiently flexible that the undercut portions of the U-shaped ridge are urged into engagement with the undercut portions of the channel and the crest of the ridge is urged into the channel.

REFERENCES:
patent: 2999611 (1961-09-01), Paulson
patent: 3565146 (1971-02-01), Arnolds
patent: 3620403 (1971-11-01), Rujmp
patent: 3664538 (1972-05-01), Fioretti
patent: 3704779 (1972-12-01), Nigg
patent: 3933295 (1976-01-01), Congleton
patent: 4195746 (1980-04-01), Cottrell
patent: 4294371 (1981-10-01), Davis
patent: 4360118 (1982-11-01), Stern
patent: 4838444 (1989-06-01), Bitel
patent: 4974738 (1990-12-01), Kidd et al.
patent: 5036980 (1991-08-01), VIgue et al.
patent: 5046659 (1991-09-01), Warburton
patent: 5377860 (1995-01-01), Littlejohn et al.

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