MXPA03003127A - A package. - Google Patents

Abstract

A package is made of a cardboard blank with crease lines and has wall panels (1), bottom flaps (2) forming a bottom of the package and top flaps (3), namely short-side flaps (3A) and long-side flaps (3B), folded and heat sealed together to form the top of the package. One of the long-side flaps has at its free end a seal tab (4), which is provided with a heat seal adhesive and is sealed against the opposite long-side flap. The seal tab has a smaller length than the width of the package for enabling it to be brought down into the top of the package for reclosing thereof.

Description

A PACKAGING Field of the Invention The present invention relates to a container, which is made of a piece of cardboard with fold lines, and has wall panels, the bottom fins forming a bottom of the container, and upper fins, i.e. , two long lateral fins extending without detaching over the width of the container, and two short lateral fins, the upper fins being bent and thermally sealed together to form the upper part of the container, which may be of the upper section type of triangular end, or of parallelepiped type.

BACKGROUND OF THE INVENTION

[0002] Dry foods, such as cereals, meat and porridge, are often packed in cardboard boxes or containers of the triangular end or parallelepiped type upper section type. For different reasons, it is customary to make the cardboard of waste fibers, and pack the food in the inner bag of, for example, plastic which keeps the food in good condition, until the bag is opened and prevents food from put in contact with the waste fiber of the cardboard. You can now get coated virgin fiberboard materials, which are lighter than conventional materials, and in themselves are completely sealed for dry materials, and do not give the packaged product any taste or smell. In this way, dry foods can be packed directly into the package without the inner bag, as long as the package can be sealed in an airtight manner.

Summary of the Invention A problem with hermetically sealed containers is that it can be difficult to open and close them again after use. This problem can be solved according to the present invention, so that one of the long side vanes at its free end is provided with a sealing tab, which is provided with a thermal seal adhesive to seal it against the long side flap opposite or the opposite wall panel and which has a length smaller than the width of the container to make it possible to detach it from the top of the container to close it again. In order to provide easy access to this tongue of the seal according to the present invention it can be provided with a fastening flap at its free end. The design according to the present invention makes it possible to use the seal tongue inserted between one of the long side flaps and the short side flaps as closure means. In this way, moisture and noxious animals can be kept out, also after the initial opening of the container.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be described in more detail below, with reference to the accompanying drawings in which: Figures 1 and 2 are perspective views of a first embodiment of a package according to the present invention. in a semi-finished and finished form, respectively, and Figures 3 and 4 are similar views of a second embodiment.

Detailed Description of the Invention A package according to the present invention is generally made of coated cardboard, and preferably made of virgin fiber, which is a prerequisite to allow the package to contain foods without any inner bag or the like. The cardboard material may contain different layers, for example, an EVOH barrier layer. The coating can be, for example, polyethylene. Preferably, the cardboard materials are completely hermetic for dry materials. A piece of cardboard is cut first and folded and is sealed along a side edge in a conventional manner to form a semi-finished package. Open at both ends, as shown in Figure 1. It seems that this package has wall panels 1, lower fins 2, and upper fins 3. (fins 3A and 3B will be described). The lower fins 2 are often bent conventionally and for example, thermally sealed to form an airtight bottom as illustrated in the lower part of figure 2. Now the container is ready to be filled, preferably with dry foods, such as cereals, meats or porridge. Subsequently, the upper part of the container will be sealed. In a conventional manner, the short side wings 3A are folded along their fold lines, and the two long side wings 3B are brought into contact with each other and are hermetically sealed to form the airtight top part. One of the long side wings 3B (the rear one in Figure 1) has a sealing tab 4 integral therewith, but preferably separated by the fold lines and a fastening tab 5. A heat fusion adhesive is applied to the sealing tab 4, whereby the two tabs 4 and 5 are bent downwards on the formed upper part of the container, and the sealing tab 4 is heat-sealed to the opposite long lateral fin 3B, so forming a container called triangular end section, as illustrated in Figure 2. For the initial opening of the container, the sealing tab 4 can be lifted by the fastening tab 5, so that it breaks the The seal provided by the heat fusion adhesive and the long side flaps 3B are pulled apart to the extent necessary to allow pouring of the contents of the container. An important aspect of the design is that the container can be reclosed after each opening, by pushing in the tabs 4 and 5 between the opposite long side fins 3B and the short folded side fins 3A. Figures 3 and 4 show a parallelepiped container, instead of the compact container with triangular end section upper part of figures 1 and 2. Also this container has wall panels 11, lower fins 12 and upper fins 13.? From the stage shown in Figure 3, the lower fins-12 are conventionally bent and sealed, for example, thermally to form an airtight bottom, as illustrated in the lower part of Figure 4.

After filling it, the upper part of the container will be sealed. In a conventional manner, the two short lateral fins 13? they are bent in their fold lines, and the upper portions of the long side fins 13B (which are here separated from the rest of the fins by the fold lines) are brought into contact with each other and are thermally sealed to form the top hermetic The sealing tab 14 formed in the long rear side flap 13B is provided with heat fusion adhesive. The upper part is bent downwards, and the sealing tab 14 heat-sealed to the upper portion of the panel 'of the front wall 11, so that a parallelepiped package is formed, as shown in Figure 4. This The container can be opened by pulling the retaining tab 15 and then closed again after opening it, as described above with reference to figures 1 and 2.

Claims (2)

NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and, therefore, the content of the following is claimed as property: CLAIMS

1. A container, which is made of a piece of cardboard with fold lines and having wall panels (1; 11), bottom fins (2; 12), forming the bottom of the container, and upper fins (3; 13), that is, two long lateral fins (3B; 13B) extending the width of the container without being detached, and two short lateral fins (3A; 13A), the upper fins being bent, and thermally sealed together to form the upper part of the container, which may be of the upper section type with triangular end section or parallelepiped type, characterized in that one of the long side flaps (3B; 13B) at its free end is provided with a sealing tongue ( 4; 14) which is provided with a thermal seal adhesive to seal it against the opposite long side flap (3), and the opposite wall panel (11) and which has a length smaller than the width of the container to make It is possible to lower the upper part of the container for forget to close the same. The package according to claim 1, characterized in that the sealing tongue (4; 14) at its free end is provided with a fastening tongue (5; 15).