Expandable container and blank therefor

Details Expandable container and blank therefor Expandable container and blank therefor

1979-06-04

1981-04-07

Moorhead, Davis T.

Envelopes, wrappers, and paperboard boxes

Wrapper

Bottle

229 39R, 426111, B65D 8570

Patent

active

042601010

ABSTRACT:
An expandable container, formed of a unitary blank of paperboard, including a planar base panel and a plurality of planar fins foldable over the panel to enclose a conical volume. The fins serially overlap and are self-locking in the closed position, and are expandable into the open position by a force exerted from the inside thereof. Such a force can be provided by the popping of corn kernels located therein when the container is heated in a microwave oven. The fins each are trapezoidal in shape, have an interior fold line separating each into a triangular area and a parallelogram shaped area, and are hingedly coupled to the next two adjacent fins.

REFERENCES:
patent: 527202 (1894-10-01), Heywood et al.
patent: 727723 (1903-05-01), Webb
patent: 2013691 (1935-09-01), Martinson
patent: 2044103 (1936-06-01), Rossi
patent: 2047804 (1936-07-01), Shapiro
patent: 2886231 (1959-05-01), Benzon-Peterson
patent: 4134531 (1979-01-01), Martinez et al.

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