Expandable paperboard cup and blank therefor

Details Expandable paperboard cup and blank therefor Expandable paperboard cup and blank therefor

1979-11-06

1981-04-07

Moorhead, Davis T.

Envelopes, wrappers, and paperboard boxes

Wrapper

Bottle

426115, 229 8, 229DIG3, B65D 524, B65D 522

Patent

active

042600995

ABSTRACT:
An expandable container in the form of a cup made from a unitary blank of paperboard. The container has a bottom panel and four side panels and the paperboard is coated so the container can receive a liquid, such as soup, therein. A sidewise pressure exerted on the side panels downwardly expands the bottom panel to increase the depth of the container for the reception of the liquid. In one embodiment, the bottom panel has a plurality of curvilinear fold lines to allow the downward expansion. In a second embodiment, the bottom panel has a plurality of straight fold lines for this purpose.

REFERENCES:
patent: 2689183 (1954-09-01), Colt
patent: 3021045 (1962-02-01), Morris
patent: 3251532 (1966-05-01), Hechtman et al.
patent: 3533807 (1913-10-01), Wakefield
patent: 3598303 (1971-08-01), Folz
patent: 4036423 (1977-07-01), Gordon
patent: 4068795 (1978-01-01), Forster
patent: 4088261 (1978-05-01), Osborne

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