A method of making a one piece, leak proof container for holding and transporting hot melt asphalt. The container is made from a sheet of heavy duty cardboard which is coated on one side, folded and glued to create a leak proof container. The sheet has a series of pre-scored fold lines to allow the sheet to be folded into a container with a leak proof bottom. A series of reinforcing sheets are added to the bottom of the container to provide reinforcement, and to create the leak proof base.

A sheet of packaging material to form a package, comprises a receiving region to receive an opening device of the package attached thereon, the sheet of packaging material further comprises two reference marks detectable by a detecting unit of an applying device arranged for applying the opening device on the receiving region. A method for producing a package comprises folding, filling and sealing a sheet of packaging material to obtain the package, the packaging material comprising a receiving region to receive an opening device and two reference marks, the method comprising detecting the reference marks and selecting a subsequent action to be performed on the package and/or the opening device on the basis of the detected position of the reference marks.

A paper-based or paperboard-based container (100) for holding a pourable food product is described, the container comprising: a substantially planar bottom portion; a top portion arranged opposite the bottom portion and comprising a top panel and a top sealing region (126) forming a top seal of the container; and a wall portion extending between the bottom portion and the top portion and comprising a plurality of wall sections (108b, 108c) bordering the top panel and a longitudinal sealing band (14) extending between the bottom portion and the top portion and over at least one of the wall sections, wherein the top sealing region is folded onto said at least one of the wall sections comprising the longitudinal sealing band (14) and being attached thereto. A blank and a sleeve for producing the container is also described, as is a method for producing the container.

A method for customizing a blank of sheet material delimited by first and second opposite sides and third and fourth opposite sides orthogonal to the first and second sides involves doing, on a face of the blank, a first couple of first and second wave-shaped crease lines and a second couple of third and fourth wave-shaped crease lines, each wave-shaped crease line being crossed by straight crease tracts, so that the third side, the first, second, third and fourth wave-shaped crease lines and fourth side delimit in succession a first top panel, a first side panel, a bottom panel, a second side panel and a second top panel, doing first and second continuous straight crease lines parallel to each other and to the straight crease tracts and delimiting respective back and front wings of each of the first top panel, first side panel, bottom panel, second side panel and second top panel. Glue is transversally applied to the straight crease lines.

In one aspect, a blank is formed of a substrate laminated with a thin polymer film layer. The blank includes fold lines and cutouts such that it is formable into a pack with a base that is fully sealed by the film layer, thereby solving the technical problem of packs formed from blanks where the bases include unsealed gaps or holes. In further aspects, a folded blank, packaging articles formed therefrom, and methods of manufacture are provided.

A top forming part creasing mechanism for forming a top portion of a paper container, the top forming part creasing mechanism includes: a first creasing device (4) that valley-folds, along horizontal folding lines (111, 113), a right side panel (112) and a left side panel (114) of a carton blank (126) fitted onto a mandrel so as to spread out the right side panel and the left side panel from a center to an outer side of the carton blank; a second creasing device (5) that makes creases by inwardly mountain-folding a top upper surface panel (108) and a top upper surface auxiliary panel (110) along horizontal folding lines (107, 109); and a third creasing device (6) that makes a crease by outwardly valley-folding a sealing panel (117), which is provided on an edge of the top upper surface auxiliary panel, along a horizontal folding line (116).