Packaging for free-flowing products, consisting of a heat-sealed bag

Abstract

Packaging for free-flowing products consisting of a tubular bag composed of a flexible material. One end, which lies flat when the bag is filled, is formed by two broad-face panels lying flat against one another and narrow-face panels that are folded back by center fold lines between the opposite edges of the narrow-face panels, and positioned between the marginal areas of the broad-face panels. A side fold connects each narrow-face panel to one broad-face panel and another side fold connects the narrow-face panel to the other broad-face panel. The fold lines extend substantially parallel to the longitudinal axis of the bag. The end of the bag is closed by a sealing weld that extends in a transverse direction to the longitudinal axis of the bag. The sealing weld is controlled to be weaker than the other welds which connect the panels to form the panels into a bag for containing the product. Preferably the outer surfaces of the panels are treated to prevent their being sealed together when folded back

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a '365(c) continuation of PCT / EP2004 / 012281 filed Oct. 29, 2004, which claims priority to DE Application 103 52 019.8, filed Nov. 7, 2003, each of the foregoing applications is incorporated herein by reference.FIELD OF THE INVENTION [0002] The invention relates to a packaging for free-flowing products consisting of a tubular bag composed of a flexible material, and said packaging, when full, has an end that lies flat, formed by two broad-face panels lying flat against one another and narrow-face panels that are folded inwards at both edges of said panels and lie between the latter, wherein a side fold adjoins one broad-face panel and another side fold adjoins the other broad-face panel, the end of the bag being closed by means of a sealing weld that extends substantially in a transverse direction to the longitudinal axis of the bag. BACKGROUND OF THE INVENTION [0003] These types of packaging bags are used as e.g. a r...

AI Technical Summary

Benefits of technology

[0010] Different from the family of packages of this type, the package in accordance with the application therefore has no four-ply sealing weld region in the region of the end of the bag, as the folded side folds are not sealed to each other, but rather only to the neighboring broad-face panel. In this way a problem-free opening of the package is possible—also without utensils—without the danger of uncontrolled ripping.

[0015] In order to improve transport and storage and to ensure a good drop strength, such that, for example, the sealing weld does not burst after the package falls from a shelf, the end of the bag is preferably turned back and attached to the external face of the bag. The attachment can be carried out, for example, by the use of hot air. Turning over the end of the bag prevents the force generated by the fall from directly striking the sealing weld. The generated forces are directed much more to the turned back bag end, preventing damage to the sealing weld.

Problems solved by technology

As a result, it is practically impossible to open the packaging without a utensil.

These rips proceed uncontrollably strongly in the direction of the bottom of the bag.

However, such a line of weakness brings the inherent danger of an unwanted opening, for example during transport or product handling.

However, this packaging bag does not have any folded sides.

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