DE2742826A1 - METHOD OF SEALING BAGS - Google Patents

Description

PATENT ADVOCATE DR. HANS-GUNTHER EGGERT, DIPLOMA CHEMIST

5 COLOGNE 51, OBERLÄNDER UFER 90 2742826

Cologne, August 22, 1977 86

Generale des Engrais S.A., 47, rue de Villiers, 92527 Neuilly sur Seine (France)

Method for closing bags

The present invention relates to a method for closing of bags, or sacks, which at the same time is a perfect one Ensures tightness and easy handling.

Numerous devices are used for closing and handling bags, the goods generally being loose in the form of powders or containing granules.

The oldest method consists of a "Müller knit" in which a loop knot is formed around one at the top of the sack Pulling the rope. However, this is dangerous because if the tension of the rope gives way, the sack will tip over and not a denser one Closure of the bag can be ensured, in particular essential for moisture sensitive products.

In order to overcome this disadvantage, numerous bag handling methods have been used. For example, came Bags made of plastic material for use, whereby the tightness is ensured by tying or welding, which are either placed on pallets or in carrier bags of suitable strength. Bags were also made which are particularly suitable for gripping, as described in Norwegian patent specification 43o / 73 of November 13, 1973

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are written. These bags allow easy handling, but either require special handling machines or separate tying of inner and outer bags.

The use of bags made from fabric, the mi> plastic material is coated and provided with rings or bumps for gripping, enables these difficulties to be avoided, however, because of their expensive production, they are suitable for inexpensive goods in large quantities, and particularly for one-way packaging not suitable.

The invention relates to a method for closing of bags, which was developed during research into the packaging of fertilizer and which makes it possible in a simple manner, A tight seal and an easy handling device for all types of bags in a single step obtain. This method can be effective for handling any solid, liquid, or semi-liquid product such as fertilizers or the like, products for human or animal consumption, plastic materials and more generally chemical products be used.

The procedure consists in gathering the top of the bag in the form of a strand, the strand through one To guide the handling ring to form a gooseneck that is attached under the ring.

This method is particularly suitable for closures of bags which consist of an outer woven cover and an inner one Bags are made of plastic film, which are used more and more to hold loose products. Allows it is to handle bags with 2oo to 2ooo kg, which can no longer be handled by human hands without the interposition of a machine are.

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The gathering of the upper part of the pre-filled bag can be done manually or mechanically by a suitable device be made. For the best result, it is desirable that the strand run through regular sequentials Creases in the form of accordion creases are formed.

The strand made by narrowing the gathered or folded End must be tightly tied to allow the use of a handle ring, which is as small as possible. The handling ring must be made of a suitable material with sufficient dimensions to to withstand the intended static and dynamic tensile loads. It enables later handling by one simple load hook, eliminating the much more complicated devices currently in use, such as self-tightening Pliers, pallets, etc., should be avoided.

The gooseneck formed from the strand, the one through the handling ring is performed, avoids the accidental entry of liquid, especially rainwater, which is a simply gathered end cannot be avoided.

The two ends of the gooseneck need to be pinched so tightly be that they withstand mechanical stresses to which they are subjected during handling of the bag. For this purpose, for example, tying with a tape, in particular made of steel or a plastic material, can be used, which is particularly suitable as it enables quick and effective clamping. However, other means of attachment are also possible can be used by clamping, for example iron wire with a suitable cross-section, clamps or screw clamps, gluing etc.

The invention is described below using an exemplary embodiment explained in connection with the attached figures.

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example

A cylindrical pouch 200 cm high and diameter of 80 cm containing 500 kg of granulated fertilizer 3 is made from an outer bag 1 made of woven polypropylene body with a square meter weight of 17o g and an inner bag 2 made of a low density polyethylene film and one Wall thickness of 80 μ formed, the upper edge of which protrudes 10 cm beyond the outer bag, as shown in FIG. This The bag was filled with fertilizer to a height of 1 cm.

An operator manually forms the strand 4, shown in FIG. 2, by squeezing the upper part of the bag is. This strand is guided through a metallic closed handling ring 5, which is shown schematically in FIG 3 is shown, the ring having the internal dimensions 7o χ 14o mm and the external dimensions 80 χ 150 mm. Man folds the part of the strand that has passed through the ring onto the upwardly extending part of the strand, like is shown at 6 in FIG.

The operator attaches the gooseneck formed in this way by applying a steel band 7 of a length of 19 mm and a thickness of 0.63 mm with the help of a corresponding machine with a tensile force of 4oo kg / cm, so that in this way the closed bag shown in FIG. 4 is obtained, which can be attached to a truck by simple Engagement of a load hook of the crane of the truck with the handle ring can be loaded.

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Claims (3)

Claims Method for closing bags, which at the same time ensures the tightness of the bags and their easy handling is ensured, characterized in that the upper part of the bag is gathered in the form of a strand and the strand is passed through a handling ring to form a gooseneck that you pass under the ring Tying, strapping, crimping or gluing attached. 2. Method of closing bags from an external A woven cover and an inner bag made of a plastic film according to claim 1. 3. The method according to claim 1 or 2, characterized in that the fastening under the handling ring by attaching of a tape is made. 809813/0939 ORIGINAL INSPECTED