Unitary double cavity carton
First Claim
1. In a double cavity paperboard carton formed of a single cut and scored blank having a bottom cavity portion and a top cavity portion wherein each of the bottom and top cavities comprise hingedly connected front, side and rear walls adhered through suitable glue tabs, and the top and bottom cavities are hingedly connected through a center hinge line connecting their respective rear walls, the improvement which comprises provision of a fold area on said carton rear wall adjacent said center hinge line within which folding is controlled without buckling or outward bowing, said area being selected from the group consisting of (1) a hinge ridge defined by a member selected from (a) at least one line of weakness adjacent and parallel to said center hinge on either side thereof;
- and (b) an offset cut score or knife cut at the center of said center hinge; and
(2) a hinge channel defined by at least one line of weakness on each side of said center hinge.
3 Assignments
0 Petitions
Accused Products
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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Citations
25 Claims
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1. In a double cavity paperboard carton formed of a single cut and scored blank having a bottom cavity portion and a top cavity portion wherein each of the bottom and top cavities comprise hingedly connected front, side and rear walls adhered through suitable glue tabs, and the top and bottom cavities are hingedly connected through a center hinge line connecting their respective rear walls, the improvement which comprises provision of a fold area on said carton rear wall adjacent said center hinge line within which folding is controlled without buckling or outward bowing, said area being selected from the group consisting of (1) a hinge ridge defined by a member selected from (a) at least one line of weakness adjacent and parallel to said center hinge on either side thereof;
- and (b) an offset cut score or knife cut at the center of said center hinge; and
(2) a hinge channel defined by at least one line of weakness on each side of said center hinge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- and (b) an offset cut score or knife cut at the center of said center hinge; and
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14. A recloseable double cavity paperboard carton formed of a single cut and scored blank having a bottom cavity portion and a top cavity portion each comprising hingedly connected front, side and rear walls adhered through suitable glue tabs;
- the bottom and top cavities being hingedly connected through a center hinge line joining the respective rear walls;
the bottom front wall comprising a bridging panel hingedly connected along a line of weakness to its lower edge and folded outwardly to lie sandwiched between the top and bottom cavity front wall when the carton is closed;
the carton rear wall comprising a fold area adjacent said center hinge within which folding is controlled without buckling or outward bowing, said fold area comprising a single cut score adjacent and parallel to the center hinge, said cut score extending substantially the entire length of the center hinge and cooperating with said center hinge to form a hinge ridge when the carton is closed.
- the bottom and top cavities being hingedly connected through a center hinge line joining the respective rear walls;
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15. A recloseable double cavity formed of a single cut and scored blank having a bottom cavity portion and a top cavity portion, each comprising hingedly connected front, side and rear walls adhered through suitable glue tabs, the bottom and top cavities being hingedly connected through a center hinge line joining the respective rear walls;
- the bottom front wall comprising a bridging panel hingedly connected along a line of weakness to its lower edge and folded outwardly to lie sandwiched between the top and bottom cavity front walls when the carton is closed;
the carton rear wall comprising a fold area adjacent said center hinge within which folding is controlled without buckling or outward bowing, said fold area comprising a member selected from the group of perforated lines and cut score lines and combinations thereof adjacent to the center hinge and disposed on each side thereof, said member extending substantially the entire length of the center hinge and cooperating with said center hinge to form a hinge channel when the carton is closed.
- the bottom front wall comprising a bridging panel hingedly connected along a line of weakness to its lower edge and folded outwardly to lie sandwiched between the top and bottom cavity front walls when the carton is closed;
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16. In a one-piece paperboard carton blank adapted to be formed into a double cavity carton having a bottom cavity portion and a top cavity portion each comprising hingedly connected front, side and rear wall panels and wherein the top cavity panel and the bottom cavity panel are hingedly connected through a center hinge in the rear wall panel, the improvement wherein said rear wall panel comprises a fold area adjacent said center hinge line within which folding of the top cavity in the erected carton is controlled without buckling or outward bowing, said area being selected from the group consisting of (1) a hinge ridge defined by a member selected from (a) at least one line of weakness adjacent and parallel to said center hinge on either side thereof and (b) an offset cut score or knife cut at the center of said center hinge;
- and (2) a hinge channel defined by at least one line of weakness on each side of said center hinge.
- View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
Specification