FI66154C - FLEXIBEL BEHAOLLARE FOER TRANSPORT OCH LAGRING AV MASSAGODS AMT FOERFARANDE FOER DESS TILLVERKNING - Google Patents

Description

66154

Flexible container for the transport and storage of bulk goods and the method of its manufacture

Flexibles for transport and handling of masses for the purpose of transport

The invention relates to a flexible container for the transport and storage of bulk goods, which container comprises a jacket, a bottom and a filling opening, which container can be lifted from its upper end and which has a valve pipe formed below the bottom of the container. The invention also relates to a method for manufacturing such a flexible container.

FI patents Nos. 57,381, 57,382 and 61,174 disclose a flexible container for the transport and storage of bulk goods. These known tank solutions use a rectangular bottom structure. If it is desired to equip such a tank with a valve pipe, a hole is made in the bottom and a valve pipe is sewn into the hole before connecting the bottom to the other structure of the tank. As such a base structure, either a loose base with an opening into which the valve pipe is sewn or a part of the container which forms at least a base in the finished container can be used. An opening is thus made in such a part of the container, into which the valve pipe is sewn. The disadvantage of these known solutions is that the formation of the valve tube is a very cumbersome and relatively expensive operation.

The object of the invention is to provide a flexible container on the bottom of which a valve pipe can be formed in a simple and inexpensive manner.

Yet another object of the invention is to provide a flexible container with a good bottom strength despite the formation of the valve tube.

The objects of the invention are achieved by a flexible container, characterized mainly in that the container is formed by a first larger diameter tubular member having a second smaller diameter tubular member disposed thereon attached to the lower edge of said first tubular member by a circumferential seam valve.

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According to claim 2, the smaller diameter tubular portion is disposed within the larger diameter tubular portion such that the lower edges of said tubular portions are substantially aligned, and the smaller diameter tubular portion is secured to the lower edge of the larger diameter tubular portion by a circumferential seam.

After forming a circumferential seam according to claim 3, a smaller diameter tubular portion is drawn from within the larger diameter tubular portion over said circumferential seam outside the container into a valve tube which is closed in a bulk filled container by a closure device known per se.

According to claim 4, the closure device of the valve tube is a strip, rope or the like attached to a smaller diameter hose-like part.

According to claim 5, the valve tube is closed by a second seam formed below said circumferential seam.

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It is also an object of the invention to provide a method for manufacturing a flexible container. The method according to the invention is mainly characterized in that the smaller diameter tubular part is placed inside the larger diameter tubular part so that the lower edges of said tubular parts are substantially aligned, a circumferential seam is formed connecting said tubular parts and said smaller tubular part over the circumferential seam outside the tank as a valve tube.

According to claim 7, before forming the circumferential seam, the larger diameter tubular portion is folded at its lower edge into the circumference of the smaller diameter tubular portion.

Numerous significant advantages are achieved with the container according to the invention and its manufacturing method. The invention makes it possible to manufacture containers from tubular blanks, whereby a valve tube can be formed in the container in a simple and very inexpensive manner. At the same time, a high-quality bottom strength is provided in a wooden tank, as is generally the case in tanks made of tubular preform.

The invention will be explained in detail with reference to some preferred embodiments of the invention shown in the figures of the accompanying drawings, to which the invention is not intended to be exclusively limited.

Figure 1a shows a top view of a larger diameter tubular part.

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Fig. Ib shows a front view of the tubular part according to Fig. 1a.

Fig. 1a shows the tubular part according to Fig. 1a opened as a tube. 15

Figure 2a shows a top view of a smaller diameter tubular part.

Fig. 2b shows a front view of the tubular part according to Fig. 2a.

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Fig. 2c shows the tubular part according to Fig. 2a opened as a tube.

Fig. 3a shows a step of the method according to the invention, in which a tubular part with a smaller diameter is arranged inside a tubular part with a larger diameter, so that the edges of the tubular parts are aligned, seen from above.

Figure 3b is a front view of Figure 3a.

Fig. 4 is an axonometric view of a step of the method according to the invention, in which the lower edge of the larger diameter tubular part is corrugated to reduce the circumferential length to the same as the circumferential length of the smaller diameter tubular part.

Figure 5 shows a step of the method according to the invention, in which a tubular part of smaller diameter is sewn to the lower end of a tubular part of larger diameter, seen from above.

66154

Figure 6 shows the step of the method according to the invention, in which a tubular part with a smaller diameter is pulled out from inside a tubular part with a larger diameter to form a finished valve pipe, seen from above.

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Figure 7 is a side view of a flexible container according to the invention, the valve tube of which is closed by a strip or rope.

Figure 8 shows a top view of a flexible container according to the invention, the valve-10 tube of which is closed by sewing.

Fig. 9 shows another embodiment of the invention, in which a valve-free container is manufactured in accordance with the invention, seen from above.

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In Figures 1a, Ib and 1e, the larger diameter tubular portion is generally indicated by reference numeral 10. Such a material tube 10 is e.g. woven polypropylene. The material tube 10, when opened into a tube, forms an opening of diameter 0 ^. The jacket 20 of the material tube 10 is indicated by reference numeral 11.

In Figures 2a, 2b and 2c, the smaller diameter tubular part is generally indicated by reference numeral 20. The material tube 20 may also be, for example, woven polypropylene. The material tube 20, when opened into a tube 25, forms an opening of 0 μm in diameter. A rope or tape 23 is pre-sewn to the sheath 21 of the material tube 20 for a purpose to be explained later.

According to the basic idea of the invention, the flexible container is made of two tubular parts 10 and 20. The length and diameter 0 of the tubular part 10 is considerably larger than the length L 1 and the diameter of the tubular part 20.

As shown in Figures 3a and 3b, a smaller diameter material tube 35 is placed inside a larger diameter material tube 10 so that the lower edges of the material tubes 10 and 20 are substantially aligned. In Fig. 3a, the lower edge of the tube 10 of larger material diameter 0 66154 is denoted by reference numeral 12 and the lower edge of the smaller diameter material tube 20 by reference numeral 22, respectively.

In the next step of the method, the aligned ends 12 and 22 of the material tubes 10 and 20 are sewn together according to Figures 4 and 5.

Prior to sewing together, the lower edge 12 of a material tube 10 of larger diameter 0 is suitably corrugated to reduce the circumferential length to the same as the circumferential length of a material tube 20 10 of smaller diameter. In Fig. 4, the folds of the lower edge 12 of the material tube 10 with a larger diameter 0 are denoted by reference numeral 13. Reference numeral 15 denotes a sewing machine for forming a circumferential seam 14.

Next, as shown in Fig. 6, a material tube 20 of smaller diameter 02 is pulled out from inside a material tube 10 of larger diameter 0, whereby a material tube 20 of smaller diameter 02 forms a valve tube below the bottom in the finished container.

In Fig. 7, a flexible container 20 made by the method of the invention is generally indicated by reference numeral 100. The jacket 101 of the container 100 is formed by the jacket 11 of a material tube 10 having a larger diameter. 103 forms a material tube 20 of smaller diameter 02. As shown in Fig. 7, the valve tube 103 of the flexible container 100 is closed by a strip or rope 23 attached to the smaller diameter material tube 20 20 or by a loose strip or rope. Of course, the valve tube 103 can also be closed by sewing. In this case, the sewing seam 16 is located below the circumferential seam 14, as shown in Fig. 8.

The flexible container 100 of the invention is in no way critical to the structure of the top of the container. The upper end of the container is made in a manner known per se, in which case, for example, a filling opening and lifting loops can be formed in the upper end of the container.

In Figure 9, the invention has been applied to a flexible container which does not require a valve tube at the bottom. In this case, a suitably sized, e.g. round, piece of material 30 can be used, which is sewn to the mouth of the pleated lower edge 12 of the tubular part 10 to form a closed base. In Fig. 9, the suture seam is indicated by reference numeral 31.

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Some preferred embodiments of the invention have been described above and it will be apparent to those skilled in the art that numerous modifications may be made thereto within the scope of the inventive idea set forth in the appended claims.

Claims (7)

1. Flexible container for transport and storage of bulk goods, to which container (100) includes a sheath (101), a bottom (102) and a filling opening, which container (100) can be lifted at its upper end and below which the container (100) bottom (102) Mr formed a valve tube (103), characterized in that the container (100) Mr formed by a first tili diameter (0j) larger tubular part (10), inside which Mr placed a second tili diameter (0) smaller tubular portion (20), which Mr secured to the lower edge (12) of said first tubular portion (10) by means of an annular seam (14) to form the valve tube (103). Container according to claim 1, characterized in that the second hose-shaped part (20) is positioned inside the first hose-shaped part (10) in such a way that the lower edges (12,22) of the hose-shaped part (10,22) ) are substantially adjacent to each other and the second tubular member (20) is secured with its lower edge (22) to the lower edge (12) of the first tubular member (10) by the annular seam (14). Container according to claim 2, characterized in that after the formation of the annular seam (14), the smaller hose-shaped part (10) is pulled over from the smaller hose-shaped part (10) after the formation of the annular seam (14). said annular seam (14) out of the container (100) into a valve tube (103) which is closed in the container (100) filled with bulk goods by means of a closure device known per se. Container according to claim 3, characterized in that the closure device of the valve tube (103) is a strap, cord (23) or similar attached to the smaller diameter (0) of the tubular part (20). Container according to claim 3, characterized in that the valve tube (103) is closed by means of a smaller hose-shaped part (20) formed on the smaller diameter (0), below said annular seam (14).