An apparatus and method utilizes a forming machine which includes a mandrel and forming plate each shaped to conform the paperboard and/or corrugated material blank passing through the mandrel into the desired configuration for a leak-proof tray. The blank includes a layer of a suitable paperboard and/or corrugated material, and a layer of leak-proof plastic or paper material disposed over one side of the corrugated material. The corrugated material includes cutouts at each corner of the blank that enable the sides and ends of the blank to be folded relative to one another. The paper material continuously overlaps the surface of the corrugated layer and these cutouts to provide a continuous leak-proof barrier layer within the formed tray and at the corners of the blank when folded to form the tray, as the paper material is folded over itself to form a bellows corner in the tray.

A leak proof container and a method of forming the container from a blank. The blank includes a bottom panel, first and second side panels connected to the bottom panel at opposing lateral edges, and first and second end portions located at opposing longitudinal ends of the blank. Each end portion includes an inner end panel connected to the bottom panel, an outer end panel connected to the inner end panel, and first and second corner panels, each corner panel having an edge connected to a respective one of the first and second side panels and having an edge connected to the inner end panel. First and second locking tabs are defined in the outer end panel, each locking tab being defined by a lateral separation line located longitudinally inward from an outer longitudinal edge of the outer end panel and extending laterally to define a free tab end.

A leak proof container and a method of forming the container from a blank. The blank includes a bottom panel, first and second side panels at opposing lateral edges of the blank, and opposing end portions located at opposing longitudinal ends of the blank. Each end portion includes an inner end panel, an outer end panel hingedly connected to the inner end panel at hinge portions, and first and second corner panels, each corner panel forming a gusset between one of the side panels and the inner end panel, each gusset including a notch area for receiving one of the hinge portions. First and second locking tabs are defined in the outer end panel. The outer end panel can be folded over the inner end panel to position the hinge portions in the notch areas, and the locking tabs can be positioned between the gussets and the inner end panel.

A leak proof container and a method of forming the container from a blank. The blank includes a bottom panel, first and second side panels connected to the bottom panel at opposing lateral edges, and first and second end portions located at opposing longitudinal ends of the blank. Each end portion includes an inner end panel connected to the bottom panel, an outer end panel connected to the inner end panel, and first and second corner panels forming gussets connected to a respective one of the first and second side panels and connected to the inner end panel. An adhesive area is located on one side of the blank and comprises at least a portion on each of the outer end panel and the inner end panel. The adhesive area adheres the gussets to the inner end panel and to the outer end panel.

This invention relates to a corrugated cardboard box (1) for the transport of fresh produce, such as frozen fish, which has improved insulation and leak-tightness properties and facilitates placing adhesive strips during the final sealing of the box, said box comprising a top cover (2), a bottom cover (4) and an intermediate leak-tight container (3) that is positioned inside the top cover (2) and the bottom cover (4) and has vertical folded edges (6).

A leakproof and liquid-tight packaging box of corrugated board, which box is erected mechanically using glueing as an aid. What is essential in the invention is that the corner surfaces of the structurally strong, torsionally rigid, leakproof and liquid-tight packaging box stackable one on top of another are folded and glued to the outer surface of the vertical surface of the short side. In addition, it comprises an inward-formed cone structure of the vertical surface of the long side of the box, and a rigid and load-resistant beam structure is formed on all sides of the packaging box.

A stackable box has side walls and end walls upstanding from a base, the box being formed from a single sheet of material cut and creased to provide, between each end of each side wall and the adjacent end wall, a diagonally creased panel, the diagonal crease extending from the intersection between the base, the side wall and the end wall. The side walls are folded over on to the base and the portion of each diagonally creased panel between the diagonal and the end wall being secured to the end wall, whereby, when the side walls are pulled upwardly and outwardly from the base, the end walls are lifted. Each side wall has along the upper edge thereof a ledge panel extending inwardly of the box and parallel to the base and the end walls each have a flap along the upper edge thereof which is foldable over to extend parallel to the base and to co-operate with the ledge panels to hold the box in shape and provide a continuous ledge surface around the open upper face of the assembled box. Each of the side walls incorporates a secondary side panel with a fixing strip therealong secured to the base whereby to form double side walls.

A case for beverage containers comprising a single continuous waterproof surface having walls and a floor and defining a container space, the container space being expandable by the movement of at least one of the walls so as to expand the container space.

The present invention is directed to a container having increased compression strength. Embodiments of the container comprise a pair of opposing side walls, each of which may include at least one layer of corrugated board having horizontal fluting and at least one layer of corrugated board having vertical fluting. Embodiments of the container also comprise a pair of opposing end walls, each of which may include at least one layer of corrugated board having horizontal fluting and at least one layer of corrugated board having vertical fluting. Embodiments of the container may be prepared from a single blank of corrugated board and may have a bottom surface that is integral with each of the side walls and each of the end walls so as to be considered leak proof. Embodiments of the container may also be configured to be collapsible to a substantially flat arrangement.

A tray for holding at least one food product includes a plurality of panels extending at least partially around an interior of the tray, the plurality of panels including a bottom panel, a front panel, a back panel, and at least one side panel, and a plurality of end flaps including a plurality of top end flaps cooperating to form a rim extending from the plurality of panels, each top end flap of the plurality of top end flaps foldably connected to an adjacent top end flap of the plurality of top end flaps.