Patent ID: 8235279

Claim:
A plastics-coated paperboard carton blank comprising a first series of panels comprised of first, second, third and fourth body panels and a bonding panel integrated through score lines and connected with an end part for forming an end closure of the carton; the end part comprising a second series of panels comprised of first, second, third and fourth end panels which are integrated through further score lines with the respective body panels and whereof the first and third end panels are for forming outside panels of the end closure and the second and fourth panels are for forming inside panels of the end closure; substantially isosceles triangular score lines having, as respective bases, score lines at the second and fourth body panels are formed in the second and fourth end panels to enable folding thereof towards the inside of the carton; the end panels have respective free end portions; the free end portions of the second, third, and fourth end panels lines of weakness extending longitudinally of the series comprised of the end panels; the free end portion of the first end panel protruding outwardly beyond the other end portions; the free end portion of the third end panel being cut out at both sides in a laterally symmetrical manner with respect to its middle, so as to leave a central tongue, and the free end portions of the second and fourth panels, respectively, are cut out at their sides adjacent to the third end panel, so as to form respective cut-outs; said cut-outs having respective first edges thereof and respective second edges thereof, the second edges being adjacent to, and further from said tongue than, the respective first edges, wherein the second edges are disposed obliquely relative to the respective first edges and diverging outwardly relative to each other.