BRPI0911265B1 - device and process for producing tubular segmental bags - Google Patents

Abstract

device and process for producing tubular segmental bags the present invention relates to a device for producing tubular segmental bags that comprise stretched plastic tape fabrics and consisting of two overlapping layers of material. are contained therein - at least one transport device for transporting the tubular segments to a transport device (x) that projects transversely towards its projection direction (z), and the tubular segments can be used in the horizontal position and - at least one device for opening at least one end of a tubular segment with a view to subsequently forming bottoms. the device for opening at least one end of the tubular segment contains the means for folding the wires of the tubular segments with which the two ends of the tubular segments can be moved from a horizontal position to a vertical position (y) with the layers of material remain in a superimposed position.

Description

Invention Patent Descriptive Report for DEVICE AND PROCESS FOR PRODUCTION OF TUBULAR SEGMENT BAGS.

[001] The present invention relates to a device and a process for producing bags, covering fabrics of stretched plastic tapes.

[002] Devices of this nature have been known and marketed for a long time. They usually cover, initially, a separation device, that is, individualization, in order to separate a tube of fed tissue, which can also be coated, for tubular segments. These consist of two overlapping material sections, each material section being made up of several layers of different materials. The tubular segments will then be received by a transport device to move them to different finishing stations. One of these finishing stations is called the bottom opening station. Here, at least one end of a tubular segment will be applied so that a bottom can be profiled at the applied end. Normally, both ends of the tubular segment will be worked in this way.

[003] A device with which bags can be produced is described and disclosed in DE 195 02 251 A1. In this description, a device of this type will be proposed that can be produced at an advantageous cost aiming at keeping investment employment within limits. In this device the tubular segments will be in cadence. In this case, the tubular segments, lying flat, will be transported transversely to their main axis, so that finishing means provided laterally can work both ends of the tubular segment simultaneously. At the opening station, the tubular segments are retained.

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2/18

Then, by means of a vacuum cleaner, the upper layer will be suspended at the ends of the tubular segments, so that a plate, horizontally movable in the direction of the main axis, can penetrate between the two layers of material of the tubular segment. The bottom layer of material from the tubular segment will be retained by underpressure on the table, on which the tubular segment rests during transport. The upper layer of material will thus be concealed back to the outside of the upper material layer, so that a bottom rectangle appears. In concealment, in addition, the so-called corner folds appear that conform on both sides of the bottom rectangle, presenting a triangular shape. After concealment, the plate will be retracted again and the bag continues to be advanced. Then, the tubular segments will then be accepted by an additional transport device, which feeds them at a uniform speed, that is, continuously, to a bottom closing device.

[004] After opening the tubular end, the rectangular segment of the bottom and the corner linings will therefore be positioned in the plane of the tubular segment, preferably in a horizontal direction. Also when closing the fund, the fund remains in the horizontal plane, since the process for closing the fund has advantages. Precisely in the production of bags that cover fabrics made of stretched plastic tapes, it is necessary to join the bottoms by means of hot air or at least by heated adhesives, such as a stretcher. It is known that only in this way can funds be produced that are very durable and capable of accepting large loads. Contrary to the gluing process, however, it is necessary to press the bottoms immediately after their joining, so that the bottom will have to be guided along its entire width by a slit of

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3/18 pressing. Therefore, it will be especially advantageous, even necessary, to work the funds on a plane located parallel to the plane of the tubular segments. In this case, both pressing cylinders can act on the entire width of the bottom. This, for example, cannot be the case when the bottoms are in an orthogonal position in relation to the body of the specific bag. In this case, a continuous cylinder gap may compress the entire bottom. In the region of the bottom center line, where the body of the bag is located, a pressing cylinder must be interrupted. There, therefore, it will not be possible to produce a pressing which could consequently have non-watertight sectors of the finished bag.

[005] Another aspect of the bottom finish in the plane of the bag body is the fact that when welding with hot air from the bottom and when a cover sheet from the bottom is applied by welding, hot air is applied uniformly on the components to be welded. Therefore, there is a uniform joining.

[006] In the past, in the described form of bag-making machines, in which the funds during the production of the bag remain in the plane of the tubular bodies, there was a tendency to register higher yields that would clearly increase the cost-benefit ratio of these machines. However, the speed of finishing of the tubular segments in devices known especially for the bottom opening station, in which the ends of the tubular segments are opened in a horizontal direction, the upper layer of the end of the tubular segment is folded back, is extremely limited. This is due in particular to the fact that a slider, during the bag stoppage phase, will have to go through a layer of the end of the tubular segment almost entirely. This procedure is comparatively complex.

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4/18 [007] Publication De 1 121 447 and US Publication 3 834 287 disclose devices for producing paper bags that include the following components:

- at least one transport device for displacing the tubular segments within a transport device (x), which projects transversely towards its extension direction (z), the tubular segments being transportable in a horizontal position, and

- at least one device for opening at least one end of a tubular segment for profiling of bottoms later, [008] the device for opening an end of a tubular segment comprises the following elements:

- means for concealment and folding of the ends of the tubular segments with which the two ends of the tubular segments, from the plane of the tubular segment, project in a plane (y), essentially in the corresponding orthogonal direction, and can thus be positioned, being thus that the layers of material remain in a superimposed position and

- means for separating and folding the layers of material with which the layers of material can essentially be folded in the direction of 90 ° spacing, so that the open bottom is situated on the plane of the tubular segment

- two pick-up devices, with each pick-up device a layer of material can be capped from the respective end of the tubular segment and the two layers of material can be separated from each other [009] With this device, no stopping phases are necessary.

[0010] Nevertheless, with these devices the layers of the

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5/18 folded ends cannot be well spaced from each other in all bottom widths, so that by means of the folding separation they can be reliably spaced from each other.

[0011] It is, therefore, a task of the present invention to propose a device for the production of bags that allows adaptation to different widths of the bottom, so that the capture devices can capture the tubular segment close to the upper end.

[0012] Thus it is provided that the device for opening the ends of the tubular segments includes supports, in which the capturing devices can be attached and the support is shaped as guides directed in an orthogonal direction towards the tubular segments and being that the capturing devices can have its height modified by displacement along the guides.

[0013] In this way, orderly opening of the ends with different bottom widths will be achieved.

[0014] The device contained in the device for opening the ends of the tubular segments contains means for concealing the ends of the tubular segments from the horizontal position to a vertical position. In this case, the two layers of material remain joined. Therefore, one end of the tubular segment will be folded in full by 90 ° in an upward direction, so that an approximately right angle appears between the tubular segment and the end folded up. It is also possible to imagine a descending 90 ° concealment at first. In this way it is possible by means of comparatively simple opening means to separate the two layers from the folded end up or down, and to fold the horizontal plane. This process can then be uniformly checked for both layers and especially during continued operation. At the

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6/18 terminal effect, a tubular segment with an open bottom is received, which later does not differ from a tubular segment provided in a cadenced regime with an open bottom, so that the well-known bottom closing station can be used. Due to the uniform working method for the two layers of material, the application of the bottom can be processed more quickly so that the production capacity can be considerably increased.

[0015] With other means for separating and folding the layers of material, it will then be foreseen to fold the two layers always in 90 °, one in the direction of the other, so that a layer of material is returned to the original plane and the other layer of material continues to be folded towards the outside of the bag body. The end of the tubular segment will therefore be, once it has been positioned vertically, open uniformly in both directions. In this way, the opening process can be accelerated markedly. Further details of this opening process will now be indicated in connection with the explanations regarding the means for separating the layers of material.

[0016] In addition, the invention covers to open at least one end of a tubular segment, for this end, at least two pickup devices, with each pickup device a layer of material from the respective tubular segment can be captured and with that at least two pickup devices the layers of material can be separated from each other. These pickup devices are suitable for applying forces on the two layers of external material, the forces being directed in the opposite direction. In this case, the forces will have to be sufficiently intense in order to be able to overcome any existing forces of attraction that could be produced, for example.

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7/18 example, by an electrostatic charge. When the ends of the tubular segment are bent by 90 ° to the horizontal plane, the pickup devices need only be moved in a horizontal plane. This represents savings compared to other devices for bag production, covering stretched plastic tape fabrics, saving the built height. When the pickup devices are mounted eccentrically on revolving elements, such as possibly discs, in their pickup devices, they can at least temporarily be operated with the same speed vector that indicates the speed direction and the speed extension as the tubular segment itself. In this way, the end layers of the tubular segment can also be separated from each other when a tubular segment is transported in a continuous regime.

[0017] They are specially adapted for these purposes vacuum cleaners that can be mounted on a beam. These can be approached on both sides for a concealed end upwards. After the vacuum is subjected to under pressure, it can be removed again so that the layers of material can also be separated from each other. Now the interior of the tubular segment offers access.

[0018] With the device recommended by the present invention, it should naturally be possible to produce bags of different shapes. Therefore, it is envisaged that the device for opening at least one end of a tubular segment comprises supports, on which the pickup devices can be attached. In these supports the pickup devices can be attached in different positions so that the layers of material can be picked up regardless of the height of the end folded upwards from the tubular segment. The supports in the case are provided

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8/18 of guides that project parallel to the folded ends of the tubular segment, that is, perpendicular to the plane of the tubular segment. By displacing the pick-up devices along the guides, they will therefore be adjustable in height. The expression adjustable in height means, in this case, that the distance of the pickup devices in relation to the transport plane of the tubular segment is changeable. In the posterior bottoms that have a reduced width, the region concealed at 90 ° from the end of the tubular segment is already small so that the capturing devices along the guides will be approached to the referred transport plane. In the case of large bottom widths, the pickup elements will be further removed from the transport plane. The guides can be formed as simple rods, in which the capturing devices can be retained by means of suitable fastening means, for example, grooved nuts. When at least two parallel guides are provided for each pickup device, then tipping of the pickup devices can be prevented. Especially in this way, a pickup device can be arranged simply and quickly in its vertical distance from the tubular segment. The height of the folded up or down edge ultimately defines the width of the finished bottom.

[0019] An especially preferred embodiment of the invention encompasses expansion elements that can be inserted between the two layers of material from the open end of the tubular segment. In addition, it is advantageous that these expansion elements separate the layers of material in such a way that they are then completely horizontal. These expansion elements therefore have a particularly good effect when they are operated in combination with the pickup devices described above. In this case, the expansion elements can penetrate

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9/18 without problems in the intermediate space between the two layers of material reciprocally separated by the pickup elements.

[0020] In another embodiment of the invention it is provided that a device for opening one end of the tubular segment comprises at least one compressor cylinder which together with an opposite layer forms a slit, whereby at least parts of an open end of a tubular segment can be driven, and these parts can be subjected to a compressive force. This compressor cylinder therefore has the task of smoothing the applied funds and, therefore, fixing them in the open form. In this way, the stamping stamps initially mentioned in the patent, which are unsuitable for use, when the tubular segments are transported in a continuous regime, may be dispensed with. The counter layer may also consist of other cylinders. It will be especially advantageous when each side of the device has an individualized compressor cylinder so that the open ends of a tubular segment can be pressed separately. [0021] In a device for the production of bags that cover fabrics made of stretched plastic tapes, they are usually profiled at both ends. As bottom opening stations often require a lot of built-up area, it will be of special advantage to make their arrangement out of date in the direction of transport. This idea will be especially advantageous when devices are used to open at least one end of a tubular segment, covering the elements described above. Basically this idea, however, does not depend on the elements mentioned above. The expression lagged in the direction of transport means, in this case, that a finishing step is initially seen at one end of the tubular segment and the same finishing stage is seen at the

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10/18 other end of the tubular segment, after which the tubular segment has been advanced. In this way, it is possible to produce bags with a very low central distance from the bottom. The central distance from the bottom in the case is represented by the distance from one fold line to another fold line, these fold lines being those around which the end regions are folded upwards. The vertical positioning step of the ends of the tubular segments occurs preferably in the sequence already described, however, this step of the process can also occur simultaneously for both ends, since the corresponding components of the device do not require much space. [0022] A great advantage of an outdated layout must be seen in the fact that especially the different elements of the bottom opening station with the capture elements and the expansion elements offer good access from both sides of the device. This advantage will be seen especially when it is analyzed that in the bottom opening station there are numerous mobile components that are subject to wear and therefore need to be maintained or replaced.

[0023] Other examples of the execution result from the detailed description.

[0024] The figures show:

[0025] figure 1 main sketch of a device for producing fabric bags [0026] figure 2 perspective view of a bottom opening station in a device according to the invention, [0027] figure 3 view IIII-III of figure 2, [0028] figure 4 view IV-IV of figure 3, [0029] figure 5 view VV of figure 2.

[0030] Figure 1 shows schematically different steps for

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11/18 the finishing of a fabric tube for forming bags as seen in the bag production device 1.

[0031] Initially, the fabric tube 2 will be fed to the bag-producing device 1. This advantageously occurs through the angular section of a fabric tube that forms a ball 3, in an unwinding device 4. Then, the tube 2 receives the so-called opening in the position separation station 5. In this process, the fabric tube will be guided around an internal tool that separates the two layers from each other so that the layers, if they have been glued in one of the production steps of the tube between them, separate. Only with separate layers can it be ensured that the following production steps can be carried out in an orderly manner. Then, the layers of material reciprocally separated from the tube will be overlapped again.

[0032] The tissue tube will now be fed to the cross-sectional device 6 which cuts the tissue tube into different tubular segments.

[0033] Then there is a change in the original transport direction z in which the tube, that is, the tubular segments were transported in the direction of their longitudinal axes, to the new transport direction x, so that the tubular segments now they will no longer be transported in the z direction of their longitudinal tubular axis, but in a corresponding transverse direction, so that the ends of the tubular segments can be reached laterally in order to form the bottoms.

[0034] At the next station, the bottom opening station 8, both ends of each tubular segment were opened and the so-called bottom squares were applied. At the subsequent new valve station, a valve will be applied and attached to one of the two open ends. Open funds will now be

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12/18 closed at the bottom closing station 10, when two splints are overlapped and are permanently interconnected, for example, by means of welding. The end of the effective bag production process is formed by applying the bottom cover sheets applied to the funds in the cover sheet station 11. For this purpose, the cover sheets can also be welded. The finished bags will then be deposited in a pile of bags from which they will be removed in a manner not described in more detail.

[0035] Figure 2 shows details of an opening station 5 in a device according to the invention. The tubular segments will be transported by means of a transport device not shown in more detail in the x direction to the support surface 14, for example, on the surface of a table, in a flattened position, that is, in a horizontal direction. To open an end 15 of the tubular segment according to the invention, this end will initially be moved from a horizontal position to a vertical position. To make this folding process possible, the tubular segment must be subjected to an opposite layer. For this purpose, the tubular segment 13 will be threaded under a felt strap 16. This felt strap may be inactive in relation to the tubular segments and, therefore, can be found in relation to the support in the movement phase. The tubular segments, therefore, can also move relative to the felt strap 16. This occurs, for example, when the felt strap is inactive. The felt strap can consist of a flexible material, however, intensely prestressed. Preferably, however, it consists of steel sheets, which, in a manner not shown, are joined with the support 14 or with the machine chassis. Steel sheets, compared to other constructed components, have the advantage of a smaller thickness with applicability

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13/18 identical load. If the tubular segment 13 is threaded, it will then be guided along a conductive element 17, for example, a conductive plate.

[0036] After the end 15 of the tubular segment 13 has been moved to a vertical position, the effective bottom opening device 18, schematically represented in the figure, will reach. In this bottom opening device 18, two suction beams are provided, which act on both sides of the retracted end in an upward direction, being conducted in, that is, against the z direction, so that the layers of material are separated from each other . At the same time, the suction beams will also be moved in the X direction, so that they can act on the bag that is still being transported. The interior of the end 15 of the tubular segment 13 now offers access. Expansion elements now penetrate this internal compartment, forcing the material layers further apart until they are positioned horizontally again. This situation is represented on the basis of open fund 19.

[0037] The opening of the second end 15 'of the tubular segment occurs in the same way, however, out of step with the opening of the first end 15. The first end will be opened already open in the bottom device 18, while the second end 15 'will be conducted under the felt belt 16'. By means of the conductive element 17 'and the bottom opening device 18', the open bottom 19 'will be produced in the manner described above. An outdated arrangement of components is advantageous when bags with very low center distances from bottom A have to be produced.

[0038] When leaving the bottom 8 opening station, the tubular segment will be provided with open bottoms 19, 19 ', with all components of the open bottoms being essentially located in the

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14/18 support plan 14.

[0039] A special aspect of the bottom opening station 8 should be seen in the fact that each bottom opening device 18, 18 'is supplied by its own torque drive. This is shown by the motor 22 in the bottom opening device 18. The corresponding motor in the bottom opening device 18 'cannot be seen in the presentation shown. The motor of a bottom opening device 18, 18 'especially supplies the suction strips with a driving torque so that they can move the layers of material in the direction of reciprocal removal. The expansion elements will also be supplied by this engine with torque.

[0040] The closing of the bottom opening devices 18, 18 'are formed by the compression cylinders 23, 23' which serve for the purpose of compressing the newly opened bottoms, thus fixing them in their position. The folded edges formed in the context of the bottom opening in the case will be stretched and then form the correct felt edges so that the bottom tendency decreases from rising again in the vertical direction. As a back pressure element for compression cylinders 23, 23 ', support 14 or back pressure cylinders 24, 24' is used. The compression cylinders 23, 23 ', seen in figure 2 in the transport direction x, are arranged at the same height. These cylinders 23, 23 'can, however, also be provided in a reciprocally outdated direction, so that open bottoms can also be pressed immediately after the opening process in the manner already described.

[0041] Figure 3 shows a view III-III in figure 2. In this figure, details of the bottom opening station 8 can be recognized. To capture layers of material from the end 15 of the tubular segment 13, suction rules are provided, of which the suction ruler 20, facing the observer, can be seen. On the ruler side

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Suction 15/18 20, away from the observer, suction units are provided that are capable of capturing the end side 15 of the tubular segment 13, facing the observer.

[0042] Bearing in mind that with device 1 according to the invention it must be possible to produce bags with different bottom widths, there is a possibility that the ends 15 folded upwards of the tubular segments 13 have different heights H. To reach an orderly opening of the ends through the vacuum cleaners, they should act as close as possible to the upper end of the end 15. For this purpose, the suction strips 20, 20 'are securely attached to guides 21, 21', so that the suction strips can be moved in the direction of the double arrow y along the ends 15 folded in an upward direction, and can be adjusted correspondingly to their heights H. The guides can be finished in different ways. They can be rounded or rectangular, massive or hollow profiles.

[0043] Figure 4 shows an illustration IV-IV of figure 3. In addition to the front suction strip 20 and the front guide 21, a suction strip 20 'and guide 21' are now also recognized.

[0044] Figure 5 shows the V-V view of figure 2. The compression cylinder 21 is mounted on a lever arm 25 or a pair of lever arms. The lever arm 25 itself is pivotally mounted on the machine frame or on mounting pads 26 on the machine frame. In a form of modality, the lever arm 25 is rotatable around an axis 27, fixedly joined with mounting fittings, and can be fixed on this axis. For this purpose, a suitable clamping device may be provided, but not shown. By fixing the lever arm 25 on the axis 27, the distance from the circumferential face to the cylinder

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16/18 back pressure or support 14 can be fixedly adjusted. In this way, the open bottom will be subjected only to a compressive force when it is also necessary to move the components of the open bottom in the horizontal plane.

[0045] In another embodiment, it can be provided that the lever arm is freely rotatable on the axis 27. In the alternative sense, it can be provided that the lever arm 25 is fixedly connected with its axis, which is rotatably mounted on the components of trim. In the mentioned embodiment, the compressor cylinder 23 can act with a predetermined force, for example, with the strength of the specific weight, on the open bottoms.

[0046] As a counter layer for the compression cylinder, to compress the open bottom, the support 14, shown in figure 2, can serve this purpose. Another embodiment, however, is to provide a back pressure cylinder 24 with which the compression cylinder 23 composes a cylinder slot into which the open bottoms 19 can be compressed. The back pressure cylinder may be rotatable, however, fixed to the chassis.

Numerical Ratio of Components 11 Bag Producing Device 22 Fabric Tube 33 Ball 44 Unwinding Device 55 Opening Station, Layer Separating Station 66 Cross Cutting Device 77 Transport Direction Modification Device 88 Bottom Opening Station 99 Valve station 110 Bottom Closing Station 111 Cover Sheet Station

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Numerical Ratio of Components 112 Bag Stacks 113 Tubular Segment 114 Support 115, End of the tubular segment 15 ' 116, Folded Strap 16 ' 117, Conductive Element 17 ' 118, Bottom Opening Device 18 ' 119, Open Fund 19 ' 220, Suction ruler 20 ' 221, Vertical Guide 21 ' 222 Motor 223, Compressor Cylinder 23 ' 224 Back pressure cylinder 225 Lever arm 226 Assembled Component 227 Axis 228 229 330 331 332

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Numerical Ratio of Components 333 334 335 336 337 338 339 440 aA Center Distance from Bottom hH End Height 15 Xx Direction of Transport of Tubular Segments 13 Yy Orthogonal Direction to the Plane applied by Transport Direction x and Projection Direction z zz Projection Direction of Tubular Segments 13

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Claims (10)

1. Device for the production of bags of tubular segments (13), which comprise fabrics of stretched plastic tapes, consisting of two overlapping layers of material, covering at least: - at least one transport device for transporting the tubular segments (13) in a transport direction (x), which extends transversely to its projection direction (z), the tubular segments being able to be transported in position horizontal, and - at least one device (18, 18 ') will be provided to open at least one end of the tubular segment (13) in order to later form bottoms, the device (18, 18') to open at least one end of a tubular segment (13) comprises the following elements: - means for folding (17, 17 ') the ends (15, 15') of the tubular segments (13) with which the two ends (15, 15 ') of said tubular segments (13) project from the plane of the tubular segment (13) in a plane (y), essentially in the corresponding orthogonal direction, with the layers of material still overlapping and - means for separating and folding the layers of material, with which the layers of material are essentially foldable by 90 ° in the direction of reciprocal spacing, so that the open bottom is situated in the plane of the tubular segment (13), the device (18, 18 ') for opening the ends of the tubular segments (13) to each end (15, 15') of the tubular segment (13) comprises at least two devices Petition 870190093125, of 09/18/2019, p. 26/33 2/4 pickups (20, 20 '), with each pickup device (20, 20') a layer of the respective end (15, 15 ') of the tubular segment (13) is captured and the two layers of material can be separated from each other, characterized by the fact that, each pickup device (20, 20 ') comprises several suction elements arranged in a ruler, and the pickup devices (20, 20') are arranged on circulating elements on which the devices pickups (20, 20 ') are mounted eccentrically. Device according to claim 1, characterized in that the device for opening (18, 18 ') the ends (15, 15') of the tubular segment (13) comprises supports (21,21 '), in which the pickup devices (20, 20 ') are fixed. Device according to claim 1 or 2, characterized by the fact that the supports are configured as guides (21, 21 '), which are arranged orthogonal to the tubular segment (13), so that the capture devices ( 20, 20 ') by displacement along the guides (21, 21') can be adjusted in height. Device according to any one of claims 1 to 3, characterized in that the device for opening (18, 18 ') the ends (15, 15') of the tubular segment (13) has expansion elements, which can be introduced between the two layers of material at one end (15, 15 ') of the tubular segment (13) and with which these layers of material can be folded into the plane of the tubular segment (13). Device according to any one of claims 1 to 4, characterized by the fact that at least one compression cylinder (23, 23 ') is provided which together with a Petition 870190093125, of 09/18/2019, p. 27/33 3/4 opposite layer (24) forms a slit through which at least parts of an open end of a tubular segment (13) can be guided, these parts being able to be subjected to compression pressure. Device according to any one of claims 1 to 5, characterized in that two devices (18, 18 ') are provided for opening one end (15, 15') of the tubular segment (13), each of which one of these devices (18, 18 ') has its own drive (22). Device according to any one of claims 1 to 6, characterized by the fact that for each end (15, 15 ') of the tubular segments (13) a means (17, 17') is provided for vertical positioning of one end (15, 15 ') of the tubular segment (13), and these means (17, 17'), seen in the direction of transport of the tubular segments (13), are foreseen out of phase. Device according to any one of claims 1 to 7, characterized in that the pickup devices (20) for one end (15) in front of the pickup devices (20 ') for the other end (15') are provided for lag against each other. 9. Process for the production of tubular segment bags (13), which comprise fabrics of stretched plastic tapes, consisting of two overlapping layers of material, in a device as defined in any one of claims 1 to 8, the process initially covering the following steps: - transport of the tubular segments (13) in the direction of transport (x), which project transversely towards its projection direction (z), at least by a transport device, the tubular segments (13) being transported in position Petition 870190093125, of 09/18/2019, p. 28/33 4/4 horizontal and - opening at least one end (15, 15 ') of a tubular segment (13) at least by means of an opening device (18, 18') to be able to later form bottoms, and before opening at least one end (15, 15 ') of a tubular segment (13) through a means for vertical positioning always from one end (15, 15') of a tubular segment (13) to at least one end (15, 15 ') of this same tubular segment (13) from a horizontal position for a vertical apposition (y), with the layers of material still overlapping, with the device (18, 18 ') for opening the ends of the tubular segments (13) for each end (15, 15 ') of the tubular segment (13) it comprises at least two pickup devices (20, 20'), with each pickup device (20, 20 ') a layer of the respective end (15, 15 ') of the tubular segment (13) and the two layers of material can be separated from each other, by the fact that, each pickup device (20, 20 ') comprises several suction elements arranged in a ruler, and the pickup devices (20, 20') are arranged on circulating elements on which the pickup devices (20, 20 ') are mounted eccentrically. Process according to claim 9, characterized by the fact that initially a first end (15) of the tubular segment (13) is moved from the horizontal position to a vertical position (y), then the tubular segment (13) ) continues to be transported so that the second end (15 ') of the tubular segment (13) is then moved from the horizontal to a vertical position (y).