Packaging container and blank
AssigneeCushionflute Pty. Ltd.
InventorsJohn Kwok, John Charles Punter
Life of this patent
Estimating the term…
Abstract
A packaging carton for wet food such as meat and fish is made of a triple ply lamination, the top and bottom plies being plastic sheet, the intermediate ply being of carton material such as paperboard but in variants the ply is made of fluted board, honeycomb matrix or side by side thin walled tubes. The intermediate ply is cruciform allowing the corners to be rectangular areas of plastic plies joined together. These form, diagonal fold flaps which are adhered to the cruciform blank to form a fold flat carton precursor. A lid is constructed in the same manner and overlies the carton to form a container which withstands tape wrapping.
Claims20
A carton precursor for a liquid tight carton comprising:
- a carton substrate ply having an obverse face and a reverse face and comprising multiple side-by-side thin-walled plastic tubes,
- a top ply of liquid impervious film laminated to the obverse face, and
- a bottom ply of liquid impervious film laminated to the reverse face,
- whereby the carton substrate ply is between the top ply and the bottom ply,
- and wherein the carton substrate ply has corner areas where the top and bottom plies are laminated together to form corner flaps,
- the corner flap in each corner area defines a pair of triangles,
- one of the triangles in each corner area is connected to an end wall of the carton precursor and the other triangle in each corner area is connected to a side wall of the carton precursor,
- and in each corner area a side wall is joined to an end wall by the corner flap made into double thickness by a diagonal fold to impose an erectable shape on the carton precursor.
A carton precursor for a liquid tight carton comprising:
- a carton substrate ply having an obverse face and a reverse face and comprising multiple side-by-side thin-walled plastic tubes, the carton substrate ply including a rectangular floor portion, a side wall portion at a first edge of the rectangular floor portion, and an end wall portion at a second edge of the rectangular floor portion, the second edge being adjacent the first edge,
- a top ply of liquid impervious film laminated to the obverse face, and
- a bottom ply of liquid impervious film laminated to the reverse face,
- whereby the carton substrate ply is between the top ply and the bottom ply and the carton precursor includes an end wall and a side wall corresponding respectively to the end wall portion and the side wall portion of the carton substrate ply,
- and wherein the carton substrate ply has a corner area between the side wall portion and the end wall portion where the top and bottom plies are laminated together to form a corner flap defining a pair of triangles connected respectively to the end wall and the side wall of the carton precursor,
- and in each corner area a side wall is joined to an end wall by the corner flap made into double thickness by a diagonal fold to impose an erectable shape on the carton precursor.
Dependencies are inferred from the claim text.