Unitary double cavity carton
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United States of America Patent
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-
May 12, 1981
Grant Date -
N/A
app pub date -
Oct 26, 1979
filing date -
Oct 26, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Unitary double cavity cartons, for example, of the type commonly referred to as clam shell cartons, are provided in which lines of weakness, adjacent the center hinge and positioned to form a hinge ridge or channel upon closing, permit the carton to open freely without buckling or tearing.
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