Bag with integral handle

Abstract: A container made of flexible material, in particular of the so-called bellows type, obtained by successive folding and welding of a sheet material provided with a handle system at its top edge (5), consisting of a cut (9) made in the central part (10) of said edge, in which to insert the fingers, said central part (10) of the edge (5) being reinforced by carrying over onto it material from the outer ends (8) of this edge itself.

Description: The present invention relates to a container made of flexible material, provided with a handle system without external added material. Containers made of flexible material, for example of the so-called bellows type, are widely known and are used to package products of various types, for example granules, powders and the like, under vacuum or otherwise. They are obtained from a single- or multi-layered material, one or both outer faces being heat sealable, for example of polyethylene. The package is obtained in a per se known manner, by successive folding, making transverse and longitudinal joins between superimposed parts of the heat-sealable layers. These known containers are not normally provided with a handle system. This poses no problems for small containers, such as packets of coffee and the like. For larger and therefore heavier packages, on the other hand, there are difficulties in handling and transport. In these cases, provision of an opening obtained by punch cutting at the top of the container, in which to insert the fingers of one hand, cannot be relied upon, since it tends to tear because of the weight of the product contained in the package. Use is therefore often made of applied handles, which are not very practical and add to the cost and the weight of the container. Moreover, these applied handles are generally not of the same material as the container, hence there are recycling problems. Some solutions involve application of a reinforcing material to the flattened centre top part of the package, before punch cutting to obtain the handle opening. One of such solutions is disclosed in GB-A- 825 159, wherein two card inserts are secured by adhesive to the inner surfaces of the container to reinforce its handle portion. These solutions present essentially the same drawbacks as applied handles. The aim of the invention is to overcome the above drawbacks, providing a container of flexible material that has a handle system without external added material, and which has an extremely light structure and a size in keeping with the product it must contain and is therefore extremely economical. The invention arises from the observation that in containers, particularly in those of the so-called bellows type, the top flattened edge has a rather weak central part because it is formed by two superimposed sheets of material, corresponding to the two faces of the container, whilst the side parts are stronger, since there are folds in the material and therefore a plurality of superimposed sheets, in particular four. According to the invention as mainly claimed in claims 1 and 2, provision is made for the material present at the sides of the top edge of the container to be brought into central part of said edge. According to an embodiment of the invention, this is achieved by outwardly folding the side portions of the upper edge of the container towards the centre, after making appropriate cuts. According to another embodiment, this is achieved by inwardly pulling the two side portions of the bellows towards the centre. In both cases, after folding an opening is made in the reinforced central part, for example by punch cutting, to obtain the handle. The cuts that are made before the folds advantageously curve slightly upwards at the end, so as to form an arch-shaped rather than right-angled connection for the resulting central part, forming the carrying handle. Provision can also be made, during punch cutting of the handle opening, for rounded cutting of the outer edges of said central portion. Obviously the edges of the folds are intended to be sealed or glued to give solidity to the handle system thus obtained. Further characteristics of the invention will be made clearer by the detailed description that follows, which refers to purely exemplary and therefore non-limiting embodiments thereof, illustrated in the attached drawings, in which: Figures 1 and 2 illustrate two successive stages in the procedure for making a bellows container, to be considered per se known; Figure 3 is a schematic axonometric view of a bellows container filled with product, on the upper edge of which cuts have been made to obtain the handle system according to the invention; Figure 4 shows a first embodiment of said handle system; Figure 5 shows a second embodiment of the handle system. With reference to these figures, the container according to the invention has been indicated as a whole by reference number 1. It is made of flexible material, in one or more layers, which can be heat-sealable on both its faces. The container 1 can be packaged under vacuum or otherwise, as shown in figures 4 and 5, and is of the so-called bellows type, that is, it is obtained by making folds along vertical fold lines 2 corresponding to its vertical edges, and making a vertical or longitudinal seal 3, which is disposed on a side surface of the container. The procedure for making the container can be considered known, so it will not be further described. The container 1, once it is made, appears as shown in figure 3, where a further transverse seal can be provided at its top, sealing it hermetically. The top transverse edge 5 of the container 1 is flattened and, according to the known art, is normally folded over the upper wall 6 of said container. According to the invention, on the other hand, said edge 5 is kept in an upright position, as shown in figure 3, and is used to obtain a handle system for the container, in the manner described below. Horizontal cuts 7 are made at the two sides of the edge 5, with the inner ends advantageously curved slightly upwards. Two free ends 8 are thus formed which, according to the invention, are brought into the central part of the top edge 5 to reinforce said part, in which the carrying handle is then made. As shown in the embodiment in figure 4, the free ends 8 are folded on the outside over the central part of the edge 5, as indicated by the arrows F, and are fixed to said central part by sealing and gluing. A sealing or gluing line is also advantageously foreseen immediately below the cuts 7. A cut 9 is subsequently made through both the central part 10 of the edge 5 and the folded ends 8, so as to form an opening for the fingers, thus forming a carrying handle. Obviously the cut 9, obtained for example by punch cutting, can have a different shape from that illustrated in figure 4, just as it can have a closed outline, thus causing removal of the material contained within it during punch cutting. The embodiment in figure 5 differs form that in figure 4 solely in the fact that the two free ends 8, instead of being folded outwards, are pulled inwards, so that they come to be inside the central part 10 of the edge 5. In this case sealing or gluing then follow and the cut 9 is made to obtain the carrying handle. In figures 4 and 5 the two free ends 8 of the upper edge 5 of the container are turned back over the central part 10 of said edge to the point of covering their entire surface. It is obvious, however, that a space can be left in the middle whilst still achieving the same aim, which is to reinforce the handle area by means of the material present at the sides of said edge, where four superimposed sheets were originally present because of the bellows folds 11. If it is wished to improve the appearance of the handle system according to the invention, rounding of the cut at the upper edges of the handle can be carried out, for example, when the cut 9 is made. Although particular reference has been made in the above to bellows-type containers the invention can obviously be applied to other types of container without side bellows, for example envelope-type containers. From what has been described the advantages of the container made of flexible material according the invention are obvious, in that it offers the user a convenient, solid handle, obtained by moving the container material itself from one area to another, which also allows complete recycling of the package after use.

Claims: A container made of flexible material, obtained by successive folding and sealing of a sheet material and having a handle system at its top edge (5), obtained by making a cut (9) in its central part (10), wherein at least a portion of said central part (10) of the edge (5) is reinforced by carrying over onto it material from the outer ends (8) of the top edge itself, characterised by the fact that said carrying over of material takes place by making cuts (7) at the ends of the edge (5) and folding the free ends (8) obtained by cutting over said central part (10) of the edge (5). A container made of flexible material, obtained by successive folding and sealing of a sheet material and having a handle system at its top edge (5), obtained by making a cut (9) in its central part (10), wherein at least a portion of said central part (10) of the edge (5) is reinforced by carrying over onto it material from the outer ends (8) of the top edge itself, characterised by the fact that said carrying over of material takes place by making cuts (7) at the ends of the edge (5) and pulling the corresponding free ends (8) of the edge (5) obtained by cutting inside the central part (10) of said edge. A container according to claim 1 or 2 , characterised in that the inner extremities of said cuts (7) are curved slightly upwards. A container according to any one of the previous claims, characterised in that said cut (9) has an open outline. A container according to any one of claims 1 to 3 , characterised in that said cut (9) has a closed outline, causing removal of the material corresponding to the surface area enclosed by the outline.

Inventors: BIANCONI LUIGINO, BOTTINI GIORGIO, GOGLIO FRANCO, BIANCONI, LUIGINO, BOTTINI, GIORGIO, GOGLIO, FRANCO
Applicants: GOGLIO SPA LUIGI MILANO, GOGLIO LUIGI MILANO S.P.A.
Application year: 1996
Main classification: B65D33
IPC codes: B65D33, B65D5, B65D30