Flexible bags – Free-standing
Patent
1997-04-16
2000-07-25
Pascua, Jes F.
Flexible bags
Free-standing
383 96, 383107, 383122, 383906, B65D 3016, B65D 3336
Patent
active
060929332
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention refers to a free-standing bag made of a heat-sealable or weldable plastic foil and used for receiving therein liquids and/or pastes, said bag comprising two side walls connected to each other along their longitudinal edges, a foldable bottom element, which is disposed between said side walls and which serves as a supporting base, being inserted between the bottom transverse edges, whereas in the area of the other ends of said side walls a foldable lid element, which is disposed between said side walls, is inserted, and further comprising a discharge opening.
BACKGROUND OF THE INVENTION
Free-standing bags made of plastic foils are known in particular as throw-away packings for beverages, but also for washing powder or the like. Free-standing bags according to the generic clause are described e.g. in German Utility Model G 89 00 883 and also in German Utility Model G 89 00 882. The bottom of such bags is provided with a supporting base so that the bag can be placed on a surface also in its open state, without the contents of the bag flowing out through the discharge opening formed in the upper area and without the bag tilting over. Furthermore, in order to increase the stability, an additional lid element, whose structural design is similar to that of the supporting base, is incorporated between the side walls in the upper part of such bags so that, when filled, bags of this type have a cylinderlike shape.
A fundamental advantage of such free-standing bags is to be seen in the fact that, as long as they have not been filled, they can be folded very tightly and that, consequently, they require only very little space. When filled, they have, however, a comparatively high inherent stability and are thus particularly suitable for use as refillable packings for the media which have already been mentioned hereinbefore.
In the case of the known bags, the discharge opening is realized either in the area of the lid element (German Utility Model 89 00 883) or in the upper part of a side wall (German Utility Model 89 00 882).
In the first case, the discharge opening lies centrally in the middle of the free-standing bag and projects like a pouring spout; however, due to its flexibility, said spout does not always permit a stable discharge of the medium during pouring out, in particular when the medium is being refilled into bottles, so that there is the risk of spilling.
In the second case, i.e. when the discharge opening is formed in the side wall, the free-standing bag must be brought up to the vessel to be filled from the side for transferring the contents of said bag into said vessel, and this may cause problems as well.
It is the object of the present invention to improve the handling characteristics of a free-standing bag of the type mentioned at the beginning when the contents are being poured out and to ensure also greater ease of manufacture.
SUMMARY OF THE INVENTION
According to the present invention, this object is achieved by the feature that the discharge opening is formed between the upper transverse edge of a side wall and the complementary edge of the lid element. It follows that a stable discharge of the substance contained in the bag can be guaranteed because said substance can flow along the side wall until it reaches the discharge opening without being rerouted. In addition, the free-standing bag according to the present invention can be produced easily and at a moderate price, since it suffices to leave open part of the welding seam between the upper transverse edge of a side wall and the complementary edge of the lid element.
In accordance with a preferred embodiment, the discharge opening is defined by a side wall flap, formed on a side wall and projecting beyond a transverse edge of said side wall, and a lid element flap formed on the lid element in a corresponding manner, said side wall flap and said lid element flap being interconnected along their longitudinal edges.
On the basis of this solution, the discharge opening is defined by two flaps
REFERENCES:
patent: 3063614 (1962-11-01), Orsini
patent: 3367380 (1968-02-01), Dickey
patent: 3380646 (1968-04-01), Doyen et al.
patent: 3935993 (1976-02-01), Doyen et al.
patent: 4732299 (1988-03-01), Hoyt
patent: 5356069 (1994-10-01), Bochet et al.
Pascua Jes F.
SPS Verpackungssystem GmbH
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