Envelopes – wrappers – and paperboard boxes – Paperboard box
Patent
1979-05-07
1980-12-23
Moorhead, Davis T.
Envelopes, wrappers, and paperboard boxes
Paperboard box
229 45EC, 229 25EC, B65D 124, B65D 136
Patent
active
042405750
ABSTRACT:
A disposable carton formed of low cost material and adapted for the packaging of eggs and the like is formed with coacting elements of a cover and latching flap which, in combination, afford rigidity to those elements, guide the coacting elements on closure and provide for a secure latching susceptible of easy opening. Recesses are provided in cover and latching flap for guidance and rigidity. Latching is accomplished by a recess extending inwardly from the cover front wall to engage the underside of a latching bar of the flap, which is positioned above a substantially rectangular shaped recess in the latching flap. The carton is particularly characterized in that it exhibits improved resistance to crushing when other cartons are stacked upon it. This crush resistance is imparted to the carton by employing integrally molded cover support ribs which are positioned immediately above and adjacent to the locking recesses on the latching flap. Such an arrangement allows the upper edge of the locking aperture on the carton front wall to bear against the cover support ribs for additional support and to withstand crushing forces which may be applied to the carton cover.
REFERENCES:
patent: 2517465 (1950-08-01), Cox
patent: 3138314 (1964-06-01), Reifers et al.
patent: 3144973 (1964-08-01), Heintzelman
patent: 3207409 (1965-09-01), Reifers et al.
patent: 3388852 (1968-06-01), Reifers
patent: 3444283 (1969-05-01), Carlson
patent: 3643855 (1972-02-01), Donaldson
Huggett Charles A.
Mobil Oil Corporation
Moorhead Davis T.
Tierney James D.
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