1259079
The bottom end closure of the patented product, ie, the cardboard box sealed by heat-pressing, has four substantially rectangular plates, and some of the plates are divided into an internal triangular sub-plate and an external triangular sub-plate by an easy folding line. There is a central bulge consisting of pairs of small rectangular sub-plates to ensure the hermeticity of the vertex. The evanescent line traverses the entire width of the root of the central protrusion so that the protrusions are sandwiched between the plates when they are each folded on themselves. The projections and plates can be interleaved with the corresponding projections and plates of the bottom of a row of identical blanks. The edge portion of the plate begins adjacent and parallel to the vertical edge of the plate and continues convexly toward the plate.
The bottom end closure of the patented product, ie, the cardboard box sealed by heat-pressing, has four substantially rectangular plates, and some of the plates are divided into an internal triangular sub-plate and an external triangular sub-plate by an easy folding line. There is a central bulge consisting of pairs of small rectangular sub-plates to ensure the hermeticity of the vertex. The evanescent line traverses the entire width of the root of the central protrusion so that the protrusions are sandwiched between the plates when they are each folded on themselves. The projections and plates can be interleaved with the corresponding projections and plates of the bottom of a row of identical blanks. The edge portion of the plate begins adjacent and parallel to the vertical edge of the plate and continues convexly toward the plate.
Lunch Box,Bento Box,Disposable Bento Box,Paper Lunch Box
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