Bowl and cover assembly

Details Bowl and cover assembly Bowl and cover assembly

1980-07-09

1982-07-27

Lowrance, George E.

Receptacles

Closures

Removable closure retained by ductile in situ deformation

150 05, 206520, 220281, 220356, 229 43, B65D 4118, B65D 4310, B65D 2102

Patent

active

043413242

ABSTRACT:
A bowl and cover assembly includes a bowl with an annular sealing lip depending radially outwardly from the upper annular rim of the bowl. The sealing lip has an annular top sealing surface and an annular edge sealing surface. The cover has a flared annular skirt about its periphery which defines a down facing mating surface and an infacing mating surface adjacent thereto. When the cover is placed over the sealing lip the top sealing surface seats against the downfacing mating surface and the edge sealing surface seats against the infacing mating surface to form an airtight seal. An annular depression in the interior surface of the bowl extends upward from an upfacing interior shoulder to provides an air bypass region to prevent vacuum locking between adjacent stacked bowls.

REFERENCES:
patent: 2934232 (1960-04-01), Pesch
patent: 3091360 (1963-05-01), Edwards
patent: 3320993 (1967-05-01), Metsenbocker
patent: 3718230 (1973-02-01), James
patent: 3967731 (1976-07-01), Boduch
patent: 3971471 (1976-07-01), Ludder
patent: 4042143 (1977-08-01), Biggins
patent: 4044941 (1977-08-01), Knudsen
patent: 4235349 (1980-11-01), Uhlig

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