Nestable lockable foamed thermoplastic container or cup

Details Nestable lockable foamed thermoplastic container or cup Nestable lockable foamed thermoplastic container or cup

1988-09-15

1990-03-20

Lowrance, George E.

Special receptacle or package

Structural features for nesting identical receptacles or...

Having defined means to limit extent of nesting

206217, 229 15B, B65D 2102

Patent

active

049093940

ABSTRACT:
A resilient, yieldable, nestable, tapered, foamed thermoplastic container or cup is provided each cup or container having an endless groove and endless lug extending from the inside and outside surfaces of the container or cup wall, the groove penetrating the container or cup wall. The endless lug extends a distance from the cup wall greater than the distance the groove penetrates into the cup wall by about several thousandths of an inch (a few thousandths of a centimeter). The groove comprises a horizontally extending lower locating ledge for preventing a cup nesting therewith being pushed in below the ledge, a substantially vertically extending intermediate sealing surface meeting an entry/retaining ramp angled to the vertical at an angle greater than about 10 degrees, which allows the lug to be gradually introduced into the groove and then inhibits axial separation, the lug being rounded in cross-section and being radially compressible when it engages the intermediate sealing surface to seal the two together, the vertical height of the groove from the ledge and thus the height of the intermediate sealing surface being greater than the height of the lug to ensure there is no axial force on the lug when accommodated by the groove. With this construction like cups can be separated and sealed a number of times.

REFERENCES:
patent: 4156483 (1979-03-01), Day

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