US Patent No: 5,332,147
Number of patents in Portfolio can not be more than 2000
Buckle-proof clamshell carton
Stats
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Jul 26, 1994
Issued date -
Apr 23, 1993
filing date -
08/051,533
serial no -
In Force
status
Importance
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Abstract
A clamshell type carton is provided with a cut along the hinge score line connecting the upper cover and lower tray portions. A second cut is placed in the back panel of the carton, above or below the hinge score line cut, wherein the second cut is a continuous curve having a first end point located in the back panel and a second end point intersecting the cut along the hinge score line. The second cut is utilized to facilitate the easy opening and closing of the carton without buckling occurring in the back panel in the region of the hinge score line.
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First Claim
Related Publications
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International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,245,773 Container with stacking alignment and latching structure | 25 | 1979 | |
| 4,304,353 Container with latching structure | 34 | 1980 | |
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| 4,360,147 Semi-domed paperboard food carton | 15 | 1981 | |
| 5,039,003 Paperboard food carton and divider | 75 | 1988 | |
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| 5,205,476 Clamshell carton having an improved latching mechanism | 29 | 1992 | |
| 5,221,040 Buckle-proof clamshell carton | 16 | 1992 | |
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| 5,098,013 Single slice pizza carrier | 21 | 1991 | |
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| 4,232,816 Clamshell type carton | 40 | 1979 | |
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| 4,570,845 Carton closure releasable by deformation | 13 | 1984 | |
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| 4,877,178 Paperboard foldable carton | 26 | 1989 | |
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| 4,389,013 Container having a self-locking lid | 36 | 1981 | |
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| 4,792,085 Buckle-proof clamshell container | 14 | 1987 | |
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| 4,431,128 One piece blank for nesting double tray, coverable, burger and fries box | 19 | 1982 | |
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| 4,266,713 Unitary double cavity carton | 34 | 1979 | |
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| 4,909,432 Paper container for liquid | 12 | 1988 | |
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| 4,413,726 Display box | 12 | 1982 | |
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| 4,230,261 Lunch box carton and a blank for forming same | 20 | 1979 | |
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| 4,254,862 Foldable disposable sharps container | 16 | 1978 | |