EP0640155B2 - Textile bag, textile web for bags and process for producing a textile web - Google Patents

Abstract

A bag made of textile material, the two superimposed hollow textile layers of which are joined together at the sides and bottom of the bag by dobby fabric (6; 8) and at the top by strips (2) of dobby fabric, where the lateral dobby fabric (6) joining the front (10) and rear (11) of the bag extends from the dobby fabric (8) at the bottom at least as far as the top strips (2). Several such bags are arranged beside one another in a textile web, and the dobby fabric (6) joining the front (10) and rear (11) of the bag has a central selvedge (1) for separating the bags. The dobby fabric (8) closing the bag off at the bottom forms one continuous edge of the textile web and the top strips (2) form the other continuous open edge. In the process, a textile web for bags is produced on a power or automated loom with a dobby in a continuous production cycle with shaft threading in of three repeating groups.

Description

The invention relates to a sack made of textile material, which is formed from a hollow fabric, the two superimposed, The fabric layers forming the front and back of the sack on the side and bottom each are connected to one another by a shaft fabric, a fabric web for sacks which comprises a double fabric, that in the direction of the warp threads on one edge, a continuous connecting the two layers of the double fabric Has shaft fabric and the corresponding distances in the direction of the weft threads in the bag width the two layers of the double fabric connecting, cutting strips comprising shaft fabric strips is provided, and a method for producing a fabric web for sacks on a conventional weaving machine or on a looms equipped with a dobby in one production run.

Up to now, either sacks have conventionally been used for the storage and transportation of fruits and vegetables and the like with loose weave made of plastic base materials or from common natural base materials in dense weave manufactured.

Production processes for sacks made from plastic base materials, e.g. from plastic sheeting or by knitting of plastic threads on knitting machines, are very common today, but with due regard to Such methods are suitable for connecting the edges of the individual bags thermally not for the production of sacks from natural textile materials, e.g. 100% cotton. Especially from Environmental protection would be the production of bags from natural, combustible and compostable Textile materials very desirable.

1. Stricken des Materials für den Sackkörper auf speziellen Raschel-Strickmaschinen.

2. Zuschnitt (Konfektionierung) des Sackkörpers entsprechend den gewünschten Maßen aus dem gestrickten Material.

3. Zusammennähen der Säcke und Vernähen der Ränder.

A production process for sacks made of textile material, which consists of natural base material, takes place in a conventional manner in three phases:

1. Knitting the material for the sack body on special Raschel knitting machines.

2. Cutting (assembly) of the bag body according to the desired dimensions from the knitted material.

3. Sew the bags together and sew the edges together.

EP 0 408 467 A1 also describes a method for producing woven bags on a conventional one Loom with a shaft control for the warp threads to achieve a leno weave is known. After this The process produces a double weave, the two of which consist of leno fabrics, one on top of the other and separate layers by interlacing their respective warp and weft threads along an edge in the warp thread direction and connected to one another over the entire width at fixed intervals in the weft direction are. Here, a coherent web of successive sacks is obtained, which are connected to one another in the transverse direction and connected along one selvedge, the other selvedge remaining open. Such a dead end is suitable for automatic filling of the bags, the separation of the bags from each other after filling and The same is closed along the middle of the respective cross-connection area.

The object of the invention is now also to create a sack made of textile material and a fabric web in the form of a roll for such sacks. The sacks or fabric web should be simple and be inexpensive to manufacture, the bags also being easy to handle and also good for a machine Filling should be suitable.

The sack is characterized according to the invention in that the two front and back of the sack forming fabric layers are each provided with edge strips consisting of a shaft fabric, wherein the side fabric, connecting the front and back of the sack, extends from the bottom Shank tissue extends to at least the marginal ridges.

The preferably made of natural textile material on a conventional weaving machine or a weaving machine Sack to be manufactured with a dobby in one production run has a good durability and an attractive Appearance, all the more so as the bag body itself is woven very lightly with a wide variety of patterns can be. The bag edges and edges do not fray and, moreover, have no seams that can open. The woven bags do not need to be assembled and the finished bags removed from the loom can be used for filling immediately.

The sack according to the invention is further characterized in that handle openings in its edge strips arranged or fastener tapes are provided or woven.

According to a further feature of the invention, the sack is characterized in that its front and back made of a loose weave and that connects the two layers of fabric on the side and bottom The shaft fabric and the shaft structure forming the upper marginal ridges are of dense weave. It does not follow from this only a pleasant appearance of the sack, but the sack body itself is also sufficiently permeable to air and the edges of the sack are stable and non-fraying.

The invention also comprises a fabric web for sacks, which is characterized in that the double fabric the fabric web on the other edge has its two layers of border strips made of shaft fabric and that the cutting strips connecting the two layers of the double fabric from the continuous one edge arranged sheath fabric extend at least to the edge strips provided on the other edge and delimiting the two layers of the double fabric.

Such a fabric web, in particular made of natural textile material, such as cotton, is on a conventional loom or a loom with a dobby as a roll, consisting of a Technologically, large numbers of bags can also be produced in a very advantageous manner. Depending on the purpose the fabric sheet can be cut into pieces immediately on the cutting strips, so that individual The fabric web, which is stored as a roll, can be used to receive sacks or in the case of large industrial or large-scale operations be fed to an automatic filling machine for filling the bags. After filling one Sackes this is by sewing the edge strips or sack flaps or by means provided in the edge strips Locking straps closed and from the fabric web on the cutting bar, e.g. using a mechanical roller knife severed

According to the invention, one fabric web can, depending on the possibilities of a loom, have two or comprise a plurality of fabric webs designed as indicated above, but in which case the one for each neighboring other is arranged in mirror image. In the present case, they then form those running in the warp thread direction Dobby fabric strips also cut strips.

Bags according to the invention not only for the storage and transportation of e.g. B. fruit and vegetables can be used, but also for decoration and jewelry purposes. Finally, this is the invention Production processes in terms of material and energy requirements cheaper than the conventional, multiple phases comprehensive manufacturing process of traditional sacks.

The object of the invention is explained in more detail with reference to the accompanying drawings, for example, 1 shows a cartridge. 2 shows a plan view of a section of a fabric web according to the invention, FIG. 3 a front view of a partially broken bag according to the invention, Figure 4 is an oblique view of a Section of an expanded fabric web according to the invention and FIG. 5 a section along the line A - A through the fabric web shown in FIG. 4.

The manufacture of sacks or a fabric web for sacks takes place on traditional weaving machines or is According to a further development, this is also possible on modern weaving machines, as long as the weaving machine with a dobby is equipped. The control of the weaving machine or that equipped with a dobby can be used Looms are made using punch cards (cartridges) as well as computers (microprocessors).

The sacks are preferably made from natural, environmentally friendly, especially with regard to environmental compatibility reasons Basic materials such as cotton, jute, hemp, flax or linen, sisal, wool and the like. Natural fibers, but preferably made of 100% cotton, so that the no longer usable and disposable Sacks that can be easily burned or composted. Therefore, such bags are also called "organic bags" called.

The sack or fabric web is manufactured accordingly on dobby machines with punch card control of the cartridge according to FIG. 1, the weaving of cutting strips separating the sacks from one another by means of separate card control takes place.

Ten shafts are required for weaving. Leaf pricking takes place in comb leaves of 140/10 cm with four threads. The shafts are lifted based on the punched card perforation and the repetition is based on the size of the sack certainly.

The special thing is that while one edge of the double fabric is closed, the other edge of the Tissue is open and the hollow tissue is in the middle. The bags woven in this way do not require any more Packaging and can be supplied for their intended use.

In the following, three further examples A, B and C specified for production technology:

EXAMPLE A:

Sack three-lane, 50 cm 40 cm 33 cm
Weaving machine type: P-155 Warp thread: 50 cm barrel 434 threads. of which 2 x 32 edge 40 cm barrel 360 threads, of which 2 x 32 edge 33 cm barrel 308 threads. of which 2 x 32 edge all in all 1102 threads lacing on shaft frame 4 + 2 according to the cartridge according to FIG. 1 Number of sheets 70/10 cm rail blade base 4 threads, 3 tines remain empty, then 4 threads edge with 4 threads binding corresponding to the cartridge according to FIG. 1 Threading width 136.4 + 1.2 + 0.8 Width of raw materials 50 cm 40 cm 33 cm L / V setting 70/140 Warp thread 50 tex x 2 Weft 29.5 tex x 2 Name of the thread NL / V 13.3 / 12.1 Designation of the fabric NL / V 465/847 Areal density 159 g / m ² processing 4% shrinkage 5% Distance between the pulleys 138 cm Bale length 100 running meters possibly according to instructions

EXAMPLE B

Sack three-lane, 50 cm 40 cm 33cm
Weaving machine type: P-155 Warp thread: 50 cm run 804 threads, of which 2 x 32 edge 40 cm barrel 656 threads, of which 2 x 32 edge 33 cm barrel 552 threads, of which 2 x 32 edge all in all 2012 threads Lacing: on shaft frame 4 + 2 according to the cartridge according to FIG. 1 Number of sheets: 70/10 cm rail blade base 4 threads, 1 prong remain empty, then 4 threads edge with 4 threads binding corresponding to the cartridge according to FIG. 1 Threading width 136.4 + 1.2 + 0.8 Width of raw materials 50 cm 40 cm 33 cm L / V setting 140/140 Warp thread 29.5 tex x 2 Weft 29.5 tex x 2 Name of the thread NL / V 12.1 / 12.1 Designation of the fabric NL / V 84/84 Areal density 171 g / m2 processing 4% shrinkage 5% Distance between the pulleys 138.1 cm Bale length 100 running meters possibly after instruction Debauchery 500 running meters

EXAMPLE C

Sack 2 x 60 cm
Type of weaving machine: Chinese-175 Total warp threads 1744 of this edge 2 x 32 threads per run lacing according to the cartridge according to FIG. 1 Leaf pricking Spring leaf 140/10 cm, four threads on every fourth leaf gap Threading width Two comb sheets remain empty 2 x 60 cm between the two barrels Width of raw materials 2 x 60 cm L / V setting 140/120 Warp thread 29.5 tex x 2 Weft 19.5 tex x 2 Processing (shrinkage) 1 % shrinkage 1 % Thread waste 3% Name of the thread NL / V 6.1 / 6.1 Designation of the fabric NL / V 420/360 Areal density 150 g / m ² binding according to the cartridge according to FIG. 1 Distance between the pulleys 120 cm

2 and 4 show a portion of a fabric web for sacks, with transverse to the web longitudinal direction, the sacks separating cutting strips 1 are provided. Are on one edge of the fabric sheet continuous sack flaps or edge strips 2 are arranged. With 3 the actual bag body is designated and with 4 a place for advertising labels, but in its place a handle opening can also be provided. The sidebars 2 have in the area of their attachment to the bag body 3 a point 5 for a sewing possibility filled sack. The cutting bar 1 is located in the middle of a woven part 6 of the two Layers of the double fabric, the part 6 woven together being delimited by edges 7. On the sidebars 2 opposite edge of the fabric web is a continuous, connecting the two layers of the web Fabric strips 8 arranged, whereby the bags are also closed on the bottom.

With 9 the cavity of the sack is designated, the one Front 10 and a rear 11 has (Fig. 3 and 5).

The production of the sack or the fabric web for sacks takes place on a loom to those already described Conditions and depending on the dobby in each any pattern. The course of the production process is, as stated above, that the machine due to the shaft threading in three groups which do not fall within the scope of the invention in the first group the bag body 3 with mostly loose weave in Framework of weaving a double fabric weaves. In the second Grupppe weaves the machine based on the punch card punching given instructions according to the desired Sack sizes the front 10 and the rear 11 of the Sacks, i.e. the two fabric layers of the double fabric, in Production process together, being between the edges 7 of thus forming woven parts 6 with dense weave each the cutting bar 1 is formed, the individual Sacks separate. Because of the third group of Shank threading is also carried out continuously during production the weaving together of the two layers of fabric on one edge the fabric web to form a tightly woven shaft fabric strip 8, which closes the end of the bag. In this third Group, the formation of the sack flaps or Sidebars 2 with dense weave to limit each of the two double fabric layers on the other edge of the fabric web. in the Area of the approach to the bag body 3 are in the Edge strips 2 preferred locations 5, where the sack after Filling can be sewn up. The sidebars also offer a place 4 for the placement of advertising labels or for arranging handle openings. By means of this uniform Production processes are sacks with a sack cavity 9 received. As a result of the production process, the Weaving machine consisting of a fabric web as a roll produced a large number of bags, the web of fabric a width roughly corresponding to the bag depth, but also can have double or multiple widths. With double or multiple widths correspond approximately to the depth of the bag wide strips, however, each mirrored side by side arranged, being in the longitudinal direction of the Fabric strips running cutting strips (not shown) in the middle of adjoining shaft tissue strips 8 and / or sack flaps or edge strips 2 are located. One double or multiple width fabric web is preferred right after it comes out of the loom, along the longitudinal cutting strips cut apart. The Regulation example C for production technology concerns Making a double-wide web of fabric, both of which roughly corresponding widths in the region of the bag depth in each case the shaft bag strip forming the closed end of the bag 8 connected together and on their two outside lying formed by the sack flaps or the edge strips 2 Longitudinal edges are open. The one coming from the weaving machine Fabric web is immediately along the middle of the interconnected shaft fabric strips 8 extending Cutting bar cut apart using a rotary knife.

The width essentially corresponding to the depth of the bag Depending on the need, the fabric web is immediately placed across the Path cutting strips 1 cut into pieces to have single bags available in this way, or otherwise wound into rolls, in what form storage can also be done. Especially for large companies or industrial use of such roles the possibility of filling the bags by means of automatic Filling machines. Each time one is filled Sackes this by sewing the sack flaps or edge strips 2 closed at the intended location 5 and from the Fabric web on the cutting bar 1 by means of mechanical Rotary knife separated.

Claims (7)

1. Bag of textile material which is formed from a hollow textile, the two superimposed textile layers of which forming the front (10) and rear (11) of the bag are joined together at the sides and at the bottom of the bag by dobby fabric (6; 8) and at the top by edge strips (2) of dobby fabric, characterized in that the laterally arranged dobby fabric (6) connecting the front (10) and rear (11) of the bag extends from the bottom dobby fabric (8) up to the edge strips (2) so that the edge strips (2) are continous and separate from each other.
2. Bag according to Claim 1, characterized in that hand grip openings are arranged in the edge strips (2).
3. Bag according to Claim 1, characterized in that closure strips are arranged or woven into the edge strips (2).
4. Bag according to one of Claims 1 to 3, characterized in that its front side (10) and rear side (11) consist of a loose weave type textile and that the dobby fabric (6; 8) connecting both of the textile layers laterally and at the bottom as well as the dobby fabric forming the upper edge strip (2) is of closer weave type.
5. Textile web for bags according to one of Claims 1 to 4 which comprises a double fabric which in the direction of the warp threads at one edge has a dobby fabric (8) connecting together both layers of the double fabric and which is provided in the direction of the weft threads, in each case at distances corresponding to the bag width, with dobby fabric strips (7) connecting both layers of the double fabric together and comprising selvedges (1),
   characterized in that the double fabric of the textile web at the other edge has in both layers edge strips (2) of dobby fabric bordering in each case both of its layers and that the selvedges (1) connecting both of the layers of the double fabric extend from the continuous dobby fabric (8) arranged at one edge at least up to the edge strip (2) bordering in each case both layers of the double fabric and provided at the other edge.
6. Textile web characterized in that it comprises two or more textile webs according to Claim 5 of which one is arranged in mirror image fashion to the neighbouring next one.
7. Textile web according to Claim 6, characterized in that selvedges running in its longitudinal direction are located in the centre of neighbouring dobby fabric strips (8) and/or edge strips (2) woven in one.

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