Paperboard clamshell carton

Details Paperboard clamshell carton Paperboard clamshell carton

1995-10-31

1996-09-10

Elkins, Gary E.

Envelopes, wrappers, and paperboard boxes

Paperboard box

With closure for an access opening

229114, 2291161, 229906, B65D 522

Patent

active

055537723

ABSTRACT:
A clamshell type container is formed from a unitary blank of paperboard. The central portion of the crown of the carton is convex upwardly and the crown carries inwardly concave opposite side walls. The four corners of the crown are each provided with triangular gussets to permit slight deformation of the crown both upon stacking of the open cartons and upon closing the crown down onto the lower tray part of the carton. The tray side walls are curved or recessed downwardly so as to form line contact with a respective crown side wall, such contact defining a seal and inhibiting warm air loss when a warm foodstuff is placed in the carton.

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patent: 5188284 (1993-02-01), Eisman
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patent: 5332147 (1994-07-01), Sorenson
patent: 5388758 (1995-02-01), Scovell
patent: 5431333 (1995-07-01), Lorenz

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