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(11) | EP 1 608 567 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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| (54) |
FLEXIBLE BAG WITH HERMETICALLY RE-CLOSEABLE OPENING FLEXIBLER BEUTEL MIT HERMETISCH WIEDERVERSCHLIESSBARER ÖFFNUNG SAC SOUPLE A OUVERTURE REFERMABLE HERMETIQUEMENT |
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| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
[0001] The present invention relates to a flexible package according to the preamble of claim 1 [EP 0 540 923 A1]. In general, it relates to the packaging technique of bags made of flexible material, and in particular concerns hermetic bags that can be opened and hermetically re-closed.
[0002] Several types of sealed bags are known that are provided with systems of opening and re-closing (e.g. US 2002/0182359 A1 and EP 0 546 369 A1). In all these known systems the problem of the hermetic re-closing upon partial serving still persists. The problem is due to the fact that after the first few openings, especially when the content is powdery, the adhesiveness of the flexible re-closing devices decreases significantly.
[0003] The solution suggested by the present invention, including a vacuum sealing as defined in claim 1, successfully resolves problems that still challenge this technological field.
[0004] The invention is now explained by the following description with reference to the figures of the drawings attached as a unrestrictive example.
Figure 1 represents schematically a flexible bag (5) provided with an adhesive label (2) with a non-stick prehensile flap (3) and warranty seals (4) to reveal signs of alteration of the sealed package. One might notice indicated with broken line the easy-open below area (1) on the side of the bag by the already mentioned adhesive label (2). A dotted line indicates the fragile area of the warranty seals (4).
Figure 2 represents the bag of figure (1) after an opening operation. It can be noticed the configuration of the open bag (5) and the position of the label (2) directed upwards. It can be noticed also the two warranty seals that highlight the breaking of the fragile lines of seals (4). In this figure 2 it can be noticed the presence of the wide opening (1) corresponding to the dotted line of the previous figure. It is evident that the adhesive part of the adhesive label (2) does not come in touch with the powdery product poured outwards.
Figure 3 represents the configuration of the bag in hermetic closing position. In this figure the breaking of the seals (4) in showed.
Figure 4 represents a flexible bag (5) packaged under vacuum and its squared parallelepipedic shape and its perfect hermetic sealing are highlighted. The airtight sealing is guaranteed even with the presence of the facilitated opening area (1), of the adhesive label (2) pushed by the external atmosphere against the sealed bag (5). It can be noticed that the dotted areas (4), still intact and guaranteed sealed, are also highlighted.
Figure 5 represents the bag of figure (4) after the operation of opening of the label (2) pulled upwards through the prehensile flap (3). It can be noticed that the package does not have the parallelepipedic shape because of the isobaric conditions created after the opening.
Figure 6 shows the stance that the bag takes after the hermetic closing, which is of course not in vacuum conditions anymore. The violation of the warranty seals (4) can also be observed.
[0005] In the figures each single detail is marked as follows:
1 indicates an area with facilitated opening previously created upon the strip of flexible material to be packaged in hermetic bags.
2 indicates an adhesive label.
3 indicates a non-stick prehensile flap.
4 indicates fragile area that function as warranty seals.
5 indicates a flexible bag.
characterized in that
the package is sealed under vacuum.
dadurch gekennzeichnet, dass
die Verpackung unter Vakuum verschweißt wird.
dadurch gekennzeichnet, dass
das Klebeetikett (2) die anfänglichen hermetischen Bedingungen des unter Vakuum verpackten Beutels trotz des Vorhandenseins des Aufreißbereiches (1) sicherstellt.
dadurch gekennzeichnet, dass
das Klebeetikett (2) mit speziellen zerbrechlichen Bereichen (4) versehen ist, die die Funktion von Garantiesiegeln erfüllen, um Veränderungen an dem hermetischen Beutel anzuzeigen.
dadurch gekennzeichnet, dass
die Verpackung an einer oberen Fläche des Körpers verschweißt ist.
dadurch gekennzeichnet, dass
ein Versiegelungsabschnitt von der oberen Fläche nach oben vorsteht.
dadurch gekennzeichnet, dass
die wiederverschließbare Öffnung an einer Seitenfläche der Verpackung vorgesehen ist.
caractérisé en ce que
l'emballage est scellé sous vide.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.
Patent documents cited in the description