CN102811917A - Flexible package for liquid products - Google Patents

Abstract

A description is given of a package (1, 1') in flexible material for liquid, pasty products or the like, closed above by a linear head weld (7) which joins two opposed walls (4, 5), at which a pair of opposed welds (10, 11) is provided, in proximity of at least one upper corner (8) of the package, these opposed welds (10, 11) tending to meet at the centre line of the package and determining a flattening of the corresponding upper corner (8).

Description

Flexible packaging for liquid products

technical field

The object of the present invention is a flexible package, in particular of liquid, pasty products and the like, in particular food products such as drinks, juices, yoghurts and the like.

Background technique

A package according to the invention may for example be a stand-up package, i.e. a self-supporting package when filled with product, having a reinforced support base from which two side walls rise, along the upper edge and side edges, or it may be a parallelepiped container of the "form and fill" type, with gusseted upper and lower closures.

One or other of the above-mentioned types of liquid packages are sold with an upper weld at a distance from the level of the liquid, leaving a headspace which makes the packages soft and prevents them from being stored and/or stacked on top of each other.

These packages are usually opened by cutting the upper corner at the weld or by tearing the package at the pre-formed score.

This generally produces an uncontrolled release of liquid when the package is opened and does not ensure retention of the liquid within the package after partial use.

Contents of the invention

The object of the present invention is to eliminate the aforementioned disadvantages by providing a package, in particular for liquid products or at least partially containing liquid, pasty products, etc., which achieves a controlled release of the product and does not In use, the retention of the product in the package is ensured.

Another object of the present invention is to provide such a self-supporting package so that a plurality of packages can be stacked on top of each other during storage and/or transport.

These objects are achieved by a package according to the invention, which has the features of the appended independent claim 1 .

Preferred embodiments of the invention are described in the dependent claims.

Basically, the package according to the invention is of the upright or parallelepiped type, with a linear top weld parallel to the liquid level and also welded close to said linear top at at least one of the two upper corners of the package There are two side welds joined together at the centerline of the package at the end of the top section, which defines a V-shaped structure with its apex on the end of the linear top weld.

The linear top weld mentioned above is formed close to the liquid level to minimize the package headspace and make it self-supporting so that multiple packages can be stacked on top of each other.

Description of drawings

Further characteristics of the invention will become clearer from the following detailed description with reference to the embodiments illustrated in the drawings, purely by way of non-limiting example, in which:

Figures 1 and 2 are two perspective views from opposite angles of a stand-up package according to the invention;

Figure 3 is a front view of the package of Figures 1 and 2;

Figure 4 shows the state of use after the package in the preceding figures has been opened;

Figure 5 is a perspective view of a "form and fill" parallelepiped-shaped package according to the invention;

Figure 6 is a front view of the package of Figure 5;

Figure 7 is a side view;

Fig. 8 is a bottom view;

Figure 9 is a perspective view of a package such as that of Figure 5 with a different closure weld according to the present invention.

In the drawings, the same reference numerals are used to designate the same or corresponding parts.

Detailed ways

Referring first to Figures 1-4, there is shown a so-called upright, ie self-supporting, package or container 1 having a supporting base 2 with a peripheral weld 3 along the length of the package. The lower edge extends and rises along two opposite side regions 3'.

The two opposing walls 4, 5 rise from said base 2 and are joined to each other by welds 6 extending along the two opposite side edges of the package and then by the aforementioned side welds. A linear or transverse top weld 7 extending between 6 closes the package above.

The linear top weld 7 is formed close to the liquid level of the product contained in the package 1 in order to reduce the residual headspace of the package, thereby making the package more rigid and able to support the weight of other packages stacked on top of it .

The component material of the package 1 is usually a flexible multi-layer sheet with inner layers that can be heat welded.

According to an important feature of the invention, on the opposite walls 4, 5, close to the two opposite upper corners 8 of the package defined by the intersection of the above-mentioned side welds 6 and top welds 7 , a pair of side welds 10 , 11 is formed between each of the above-mentioned overlapping regions of the side walls 4 , 5 . These pairs of side welds 10, 11 slope upwards and towards the exterior of the package and tend to join together at the centerline of the package itself, forming a V with its apex near the respective upper corner 8 of the package. shape.

In the embodiment shown in the figures, the pairs of side welds 10, 11 are provided on the two upper corners 8 of the package 1, but obviously they could also be provided on only one of these corners superior.

Figure 4 schematically shows the package 1 opened during dispensing of its contents. In practice, cutouts are made at the upper corners 8 of the package, which may also involve the ends of the pair of opposing welds 10 , 11 , in order to define the holes 12 through which the liquid 13 is dispensed.

The arrangement of said pair of side welds 10, 11 defines the flattened character of the package near the respective upper corner 8, so that when this corner is cut away to define said hole 12, no liquid escapes from said hole 12. The container is released; the release only takes place in a controlled manner - by pressing on the opposite walls 4, 5 of the package - as schematically shown in FIG. 4 .

When the pressure is released, the liquid is sucked back into the interior of the package, avoiding drips. Even when storing opened packages, accidental pouring of liquid can be avoided if the packages are not compressed.

Figures 5-8 show a package denoted by reference numeral 1', which has exactly the same innovative features as the stand-up package of Figures 1-4.

In this case, the package has a substantially parallelepiped shape, of the so-called "form and fill" type, obtained in a manner known per se from a strip of multilayer sheet material, with an inner layer that can be heat-sealed, The packs are fed along a generally vertically positioned mandrel and closed around them by a longitudinal weld 6' positioned vertically on the wall of the formed pack, In order to form a tubular part closed at the bottom by a first transverse weld; after filling with product, this tubular part is cut and closed at the top by a further transverse weld which constitutes the above-mentioned Top weld 7. Then, on the lower transverse weld 3 , gusset folds 20 are formed in a manner known per se.

The linear top weld 7 is formed close to the liquid level of the liquid as in the case of the packages of Figures 1-4 so as to reduce the headspace, and the pair of opposing side welds 10, 11 define the apex as in the previous case A V-shaped structure near the upper corner 8 of the package.

The behavior of the package 1' with respect to the dispensing and holding of the liquid corresponds exactly to that described with reference to the package 1 of Figures 1-4.

The embodiment of Fig. 9 differs from the embodiment of Figs. 5-8 in that the longitudinal closure weld 6' is located on the vertical edge 20 of the package 1" which has "fins" at the other vertical edge. Shaped" bending and welding part 21.

It is obvious that the invention is not limited to the particular embodiments described above and shown in the drawings, but that many changes in detail are within the capabilities of a person skilled in the art without departing from it as stated in the appended claims. The purpose of the present invention is defined.

Claims (8)

1. package (1,1 ') that is used for liquid, pasty product etc. of processing by flexible material, said package is through connecting two relative sidewalls (4 of package; 5) linear top weld portion (7) is sealed upside; Thereby corresponding upper corner (8) has been confirmed in the end of weld portion at said linear top, it is characterized in that, said package is near at least one of said upper corner (8), at two of said package relative sidewalls (4; Corresponding weld portion (10 is set 5); 11), corresponding weld portion trends towards combining in the centerline of package, forms near the V-arrangement of summit said upper corner (8).

2. package according to claim 1 (1,1 '), wherein, said relative weld portion has been confirmed the flat features of the corresponding upper corner (8) of package to (10,11).

3. package according to claim 1 and 2 (1,1 ') is characterized in that, said linear top weld portion (7) is arranged near the liquid level that remains in the liquid in the package.

4. according to each described package (1,1 ') in the aforementioned claim, wherein, a pair of relative weld portion (10,11) all is set at each upper corner place of the said upper corner (8) of package.

5. according to each described package (1 in the aforementioned claim; 1 '); Wherein, the release of product is through making otch in said upper corner (8) one of them, by said relative weld portion the hole (12) that (10,11) limit being carried out confirming.

6. package according to claim 5 (1,1 '), wherein, said otch also relates to said relative weld portion to (10,11).

7. according to each described package (1) in the aforementioned claim, it is a vertical type.

8. according to each described package (1 ') among the claim 1-6, it is a parallelepiped shape.

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