Envelopes – wrappers – and paperboard boxes – Paperboard box – Box material includes a coating or a nonpaperboard...
Patent
1990-12-17
1992-01-28
Marcus, Stephen
Envelopes, wrappers, and paperboard boxes
Paperboard box
Box material includes a coating or a nonpaperboard...
229 15B, 22912517, 22912527, B65D 134
Patent
active
050836994
ABSTRACT:
In a paperboard food container, especially the clamshell type used in the fast food industry, a releasably interlocking means between the container and a lid. The interlocking means includes a slot formed in the container which not only leaves a continuous, coplanar shoulder around the circumference of the container which allows complete sealing with a lid structure, but additionally provides a tab which extends above the slot, allowing the lid structure to have either a flange extending under the container tab or, in addition to the flange, a tab inserting into the slot.
REFERENCES:
patent: 3349950 (1967-10-01), Wonderer
patent: 4026458 (1977-05-01), Morris et al.
patent: 4753351 (1988-06-01), Guillin
Foster Frank H.
Marcus Stephen
McDonald Christopher J.
Pressware International, Inc.
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