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EP3452277B1 - Transport device and method for transporting sacks or bags, and device for producing sacks or bags - Google Patents

Transport device and method for transporting sacks or bags, and device for producing sacks or bags Download PDF

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Publication number
EP3452277B1
EP3452277B1 EP17720815.4A EP17720815A EP3452277B1 EP 3452277 B1 EP3452277 B1 EP 3452277B1 EP 17720815 A EP17720815 A EP 17720815A EP 3452277 B1 EP3452277 B1 EP 3452277B1
Authority
EP
European Patent Office
Prior art keywords
transport
sacks
sack
bags
belt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17720815.4A
Other languages
German (de)
French (fr)
Other versions
EP3452277A1 (en
Inventor
Lasse Nagel
Klaus Ullmann
Andreas Lamkemeyer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP3452277A1 publication Critical patent/EP3452277A1/en
Application granted granted Critical
Publication of EP3452277B1 publication Critical patent/EP3452277B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/62—Uniting opposed surfaces or edges; Taping by adhesives
    • B31B70/626—Arrangements for permitting the glue to set
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/643—Uniting opposed surfaces or edges; Taping by applying heat or pressure on piled sheets, e.g. sealing bags arranged in a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/648—Uniting opposed surfaces or edges; Taping by applying heat or pressure using tools mounted on belts or chains

Definitions

  • the invention relates to a transport device for transporting sacks or bags according to the preamble of claim 1, a method for transporting sacks or bags according to the preamble of claim 5 and a device for producing sacks or bags according to the preamble of claim 6.
  • Generic transport facilities are necessary in order to transport individual semi-finished sacks, for example individual tube pieces, to stations for bottom formation or also finished sacks, bags or the like (hereinafter referred to as sacks for short).
  • sacks for short.
  • several transport devices are often provided, for example in order to move the sacks in a subsequent transport device at an accelerated rate compared to the preceding transport device.
  • a transport element extending in the transport device, it may be necessary for parts of the transport devices, in particular a transport element extending in the transport device, to come into contact with the floor or a freshly produced floor or in particular to lie on it.
  • a transport element basically presses the sack against a counter-surface with a pressing force.
  • the object of the present invention is therefore to provide a transport device and a method with which the sacks can be transported safely and with which undesired sticking or blocking can be avoided.
  • the sack is transported safely according to the invention by placing the transport member on a floor.
  • the alternative approach that the transport element does not rest on the bottom but on the sack body, can lead to malfunctions, particularly in the case of incorrectly manufactured sacks, for example if a bottom cover sheet is missing and the side flaps stand up. Such a raised side flap can lead to the bag getting caught in the manufacturing device, which can often only be removed manually.
  • a transport device works more reliably than one without the measure mentioned.
  • a pressing force acting on the ground also has the advantage that the freshly glued, welded or hot-air sealed bags additionally be pressed to further strengthen the connection, so that the bag can ultimately be made more stable.
  • the pressing force is reduced in areas of the floor. Such areas are in particular edge areas of bonds, so that the adhesive is not squeezed out here.
  • the area of the base in which the pressing force described is reduced includes the transition from a number of layers to a larger or smaller number of layers. Because such edges of layers are usually the places where the greatest pressing force prevails and where the effects described above primarily occur here.
  • the width of the transport element (measured transversely to the transport direction) is preferably less than the width of the base in order to avoid strong compression of the folded edges of the base. Excessive compression can lead to damage to these folded edges, which could then burst open, for example, when a filled sack is filled or dropped.
  • the transition from a number of layers to a larger or smaller number of layers includes the open end of a filling valve. This measure helps to increase the quality of the entire sack production.
  • the bottom of the sack or bag is a cross bottom or a valve cross bottom sack.
  • the sack transported by the transport device is a cross-bottom sack and in particular a cross bottom valve sack. Since its construction and production is comparatively complex, there is a great risk of unintentional sticking or blocking if it is transported with conventional means of transport. The combination of the transport device according to the invention with cross bottoms is therefore particularly advantageous.
  • each transport element resting on a bottom of the sack or bag.
  • each sack or bag comprises a base at both of its ends, on which at least one transport element rests.
  • the transport device can be used to transport sacks or bags which comprise heat-sealable material.
  • a heat-sealable material is characterized by the fact that the surface of the material is slightly melted from the surface by the action of heat, without the material being converted into the molten form over the entire layer thickness, as is the case with welding, for example. Two parts of the bag that have melted in the area of the surfaces can then be placed on top of each other and pressed so that a firm connection is created when the material cools down.
  • a heat-sealable material is preferably a plastic, a plastic coating or a plastic fleece. In particular, if these plastics comprise or contain polyethylene (PE), the possibilities described above are given.
  • the transport device can be used to transport sacks or bags which comprise a fabric made from stretched polyolefin threads and a coating and, in particular, consist of this fabric and this coating.
  • sacks or bags which comprise a fabric made from stretched polyolefin threads and a coating and, in particular, consist of this fabric and this coating.
  • the fabric and especially the coating that has been heated by the hot air first cool down slowly. The invention thus effectively prevents the blocking of areas that should not be connected to one another.
  • the transport element has recesses, recesses, indentations or the like in the area in which the pressing force is reduced. With sufficient depth of these recesses, recesses, indentations or the like, the pressing force is even reduced to 0, which is also advantageous. Although it is also conceivable and in some cases advantageous to lift the transport element from the bottom of a sack with a lifting device in the described areas with reduced pressing force, recesses, recesses, indentations or the like are easier to implement and less susceptible to wear during operation of the transport device.
  • elevations are provided on the transport element in the vicinity of the areas where the pressing force is reduced. It goes without saying that these elevations must not be in those areas since the elevations provide an increased pressing force. Compared to this increased pressing force, the pressing force is reduced in the areas mentioned. Such ridges can be elongated. It is advisable for these to run transversely to the transport direction of the transport elements. In one embodiment, provision can be made to provide a large number of elevations and to provide a large distance between two adjacent elevations in the areas mentioned with reduced pressing force, which completely leaves out the area mentioned. It is also advantageous if these elevations are releasably attached to the transport element in order to be able to move these elevations or replace them with other elevations. In this way, the transport element according to the invention can be adapted to the floor geometry that is actually produced.
  • the elevations can comprise flexible material, which develops a spring-like force effect, for example.
  • the transport element comprises at least two recesses, recesses, indentations or the like, the distance between which corresponds to the distance between two sacks or bags transported with the transport device.
  • the "distance between two sacks” does not mean the empty space between two sacks, but rather the distance between two equal points or lines, such as the distance between the leading edges of two sacks, the distance being measured parallel to the direction of transport.
  • this comprises at least one circulating transport belt.
  • the invention can be implemented in a particularly simple manner with a transport belt, in particular if the transport belt comprises cutouts, recesses, indentations or the like. Such gaps, recesses, indentations or the like can easily be taken into account in the manufacturing process of the conveyor belt.
  • the recesses, recesses, indentations or the like can be introduced into the transport belt subsequently, for example by machining.
  • transport devices that are already present can in particular be used according to the invention by subsequently designing the transport belts in accordance with the alternative described above.
  • the counter-surface comprises at least one circulating transport belt. This is preferably to be moved at the same transport speed as the transport member described above, which is designed as a transport belt, so that the sacks can be transported reliably and safely.
  • the 1 shows a transfer station 100 with a first transport device 101, with which at least one sack 102 can be transported.
  • Transport device 101 is preferably used to transport bags to different processing stations within one in the figure 4 transport device shown for the production of sacks or bags.
  • the transport device preferably includes two pairs of transport belts 103 and 103', each of which includes an upper belt 104, 104' and a lower belt 105 and 105'.
  • a force acting in the direction of the respective other belt acts on the upper and lower belts of a pair of transport belts 103 and 103', so that it is ensured that the bag 102 does not move relative to the transport device.
  • the lower belt can be fitted with magnets and the upper belt can contain a magnetizable material, so that there is a magnetic attraction force between the two belts.
  • a further transport device 110 is provided, which is designed according to the invention already described above.
  • the sacks can be transported faster than in the first transport device 101, so that two consecutive sacks are at a sufficiently large distance from one another for stacking.
  • the transport device 110 comprises two pairs of transport belts 111 and 111', each comprising an upper belt 112 and 112' and a lower belt 113 and 113', with the respective lower belt 113, 113' serving as a counter-layer for the respective upper belt 112, 112', the Bag is transported between the upper belt and the associated lower belt.
  • One measure can be a coating of the transport belts 112, 112', 113, 113' that imparts adhesive force.
  • a further measure can be devices which apply a force to the individual conveyor belts, which is directed in the direction of the other belt. Such devices can be pinch rollers that are spring mounted and press on the backs of the belts.
  • the upper straps 112, 112' and the lower straps 113, 113' are shown with different widths in this view for the sake of clarity, but can have the same width in practical implementation.
  • the width of these belts preferably corresponds to the smallest bottom width that can be produced in the device for producing sacks or bags.
  • This smallest floor width is preferably greater than 60 mm, in particular greater than 75 mm.
  • the width of these belts is somewhat smaller than the smallest bottom width that can be produced in the device for producing sacks or bags.
  • up to 10 mm should then be deducted from the numerical values given above. This measure serves to avoid damage to the folded edges. In the case of sacks made of coated polyolefin fabric, such damage is also referred to as a broken edge.
  • the upper straps 112, 112' lie on the bottoms 120, 120' of the sack 102, while the lower straps 113, 113' are in contact with the rear wall of the sack body 121, which is not visible.
  • the bottoms 120, 120' are parallel to the plane that is spanned by the bag body 121.
  • the sack 102 is conveyed in the so-called transverse transport. This means that the longitudinal axis of the bag is aligned transversely to the transport direction z.
  • the figure 2 shows the already in the figure 1 shown transfer station 100 in side view, wherein the bag 102 is not shown.
  • the reference numbers of the conveyor belt pairs and the individual belts were from figure 1 accepted.
  • the upper belt 104' of the transport belt pair 103' which is preferably a steel belt, is guided over a deflection wheel 201, which rotates in the direction of rotation R1 and can be driven in the process.
  • the lower belt 105' is guided over the deflection wheel 202, which rotates in the direction of rotation R2. This deflection wheel 202 can also be driven.
  • top strap 104 and The lower belts 105 are provided with the same deflection wheels as the deflection wheels 201, 202, it being possible for the deflection wheels for the upper belts to be arranged on a common axis. The same applies to the deflection wheels for the lower belts.
  • the upper belt 112' of the transport belt pair 111' is guided over the deflection wheel 203, which rotates in the direction of rotation R3. Furthermore, the lower belt 112' of the transport belt pair 111' is guided over the deflection wheel 204, which rotates in the direction of rotation R4. As in the case of the transport belt pair 103', the deflection wheels of the transport belt pair 111' can be drivable. It goes without saying that the upper and lower belts of the transport belt pairs 103, 103', 111, 111' can be deflected via further deflection means such as further deflection wheels or rollers, since the upper and lower belts are preferably circulating.
  • the deflection wheel 203 is vertically spaced from the transport plane of the sacks, i. H. that the upper belt 112' is not yet in contact with the sacks after leaving the deflection wheel 203.
  • Contact can be established by providing a deflection roller 205 over which the top belt 112' can also be guided, so that the deflection roller 205 presses the top belt 112' onto the sack.
  • the lower belt 113' and the part of the upper belt 112' running between the deflection wheel 203 and the deflection roller 205 form an inlet funnel for a sack 102 in order to reliably grasp it without the sack buckling or warping.
  • the deflection roller 205 is arranged at a position in the transport direction z at which the lower belt 105 ′ of the transport belt pair does not yet come into contact with the deflection wheel 202 or just about. In this way, an overlapping of the transport devices 101 and 110 is ensured, so that the bag 102 is never guided without sufficient holding forces during the transfer. This also avoids buckling of parts of the sack or a change in the position of the sack 102 relative to the transport devices.
  • the figure 3 now shows the upper belt 112' and the lower belt 113' of the transport belt pair 111' in detail.
  • the transport belt pair 111 is preferably designed in the same way.
  • a sack 102 is additionally shown, which is moved forward in a clamping manner between the two belts 112' and 113'.
  • Numerous, equidistantly arranged teeth 301 can be seen on the sides of the belts facing away from the bag 102, which indicate that the belts can be designed as toothed belts in order to avoid a relative movement of the belts to the associated deflection wheels, which are accordingly designed as gear wheels be able.
  • the sack 102 can be equipped with a valve 122 which can be part of one of the two bases 120, 120'.
  • the valve is in this case a tubular piece which ensures access from the outside into the interior of the sack 102 in order to be able to fill it, but also to prevent the product from escaping later. It is therefore convenient for filling that access through the valve is not blocked, for example by the layers of the valve connecting to one another.
  • a recess 302 is made in the upper belt 112', with the result that the upper belt does not press the sack against the lower belt 113' in this area, or at least with reduced force.
  • the recess 302 can be produced, for example, by machining.
  • the depth of the recess can be at least 1 mm, but preferably at least 5 mm.
  • Belts that are used in pairs of conveyor belts are often reinforced with metal wires in order to reduce the longitudinal stretching capacity of the belt. In this case, the depth of the recess is only so great that the metal wires are still covered with at least 1 mm of material. This prevents corrosion of the metal wires.
  • the material of the belt referred to may comprise a rubber or a plastic such as polyurethane. These materials are easy to edit afterwards.
  • the position of the cutout is chosen so that it covers the front edge 123 of the valve 122 .
  • the pressing within the transport device 101 is critical, because if the layers of the valve are connected to one another at the front edge, a filling tube of a filling device cannot gain access to the interior of the sack 102.
  • a connection in the rear area of the valve is not very critical, since a filling tube that could be inserted into the valve in the front area can separate such a connection again. Therefore, the recess in the, seen in the transport direction z, cover the rear area of the valve, as is the case, for example, in FIG figure 3 can be seen.
  • the recess is at least 1 cm long, but preferably at least 5 cm long. Furthermore, it is provided that the recess is a maximum of 20 cm long, in particular a maximum of 15 cm, in order not to reduce the tensile strength of the belt excessively.
  • the width of the recess transverse to the direction of transport preferably corresponds to the width of the belt, ie no webs or the like remain in the side areas of the belt. In another embodiment, webs, preferably with a maximum width of 1 cm, can also be advantageous in order to at least partially maintain the strength of the belt compared to belts without recesses 302 .
  • the upper belt 112' now has elevations 310. Accordingly, the entire top belt 112' does not lie against the bottom, but only this elevation 310, which now presses the sack 102 or its bottom against the bottom belt 113'.
  • a linear or punctiform pressing force is now provided. It can be seen that the elevations 310 have a uniform, preferably constant distance from one another in the transport direction z. Only in the area 311, in which the pressing force is reduced, two adjacent elevations 310 have an increased distance. In other words, these two increases delimit the area 311.
  • the figure 5 shows a non-inventive modification in the figure 4 shown embodiment of the invention.
  • Elevations 320 can be seen here. These increases 320 can be configured lower than the increases 310 in the figure 4 . However, no further elevations are provided, so that in this exemplary embodiment the upper belt 112′ rests on the floor outside of the area in which the pressing force is reduced. Because of the flexibility of the belt, it is slightly deflected by the elevations 320, but this is not problematic for operational safety. The area in which the pressing force is reduced is also limited by the elevations 320 in this exemplary embodiment.
  • the increases 310, 320 in the embodiments of Figures 4 and 5 may be fixed to the top strap 112' or detachable. The latter serves to adapt the pressing force to the dimensions of the floor.
  • the elevations 310, 320 can be individual knobs arranged in a row. Alternatively, elongate ridges such as rods or rods may be provided.
  • the elongated elevations and/or the nubs arranged in a row advantageously extend transversely to the transport direction z on the surface of the upper belt 112'
  • the figure 6 now shows a device for the production of sacks or bags 401.
  • a material hose 402 is fed to the device 401 .
  • This is advantageously done by unwinding the tube of material forming a coil 403 in an unwinding device 404 .
  • the tube 402 can then experience the so-called opening in the opening station 405 .
  • the material tube 402 is guided around an inner tool, which separates the two layers from one another, so that the layers, if they are connected to one another during one of the manufacturing steps of the material tube 402 were glued, separate. Only with separate layers can it be ensured that the following production steps can be carried out properly.
  • the separate material layers of the hose are then placed on top of each other again.
  • the tube of material 402 is now fed to the cross-cutting device 406, which separates the tube of material 402 into individual tube pieces.
  • the original transport direction x in which the tube or the tube pieces were transported in the direction of their longitudinal axes, is changed to the new transport direction z, so that the tube pieces are no longer in the direction x of their tube longitudinal axis (hereinafter also Extension direction of the tube pieces called), but are transported transversely thereto, so that the ends of the tube pieces for the purpose of forming bases 120, 120 '(see figure 1 ) are accessible from the side.
  • the bottom opening station 408 both ends of each piece of tubing are opened and the so-called bottom rectangles are placed.
  • a valve 122 is placed and fastened on one of the two open ends.
  • the open bottoms are now closed in the bottom closing station 410, with two flaps being placed one on top of the other.
  • the tabs can additionally be permanently connected to each other, for example by welding.
  • the final step in the actual sack manufacturing process is the application of a base cover sheet to each base in the cover sheet station 411.
  • the cover sheets can also be welded on or sealed on by means of a hot air supply.

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Description

Die Erfindung betrifft eine Transporteinrichtung zum Transport von Säcken oder Beuteln nach dem Oberbegriff des Anspruchs 1, ein Verfahren zum Transport von Säcken oder Beuteln nach dem Oberbegriff des Anspruchs 5 sowie eine Vorrichtung zur Herstellung von Säcken oder Beuteln nach dem Oberbegriff des Anspruchs 6.The invention relates to a transport device for transporting sacks or bags according to the preamble of claim 1, a method for transporting sacks or bags according to the preamble of claim 5 and a device for producing sacks or bags according to the preamble of claim 6.

Gattungsgemäße Transporteinrichtungen (Siehe z.B. das Dokument US3326735 A ) sind notwendig, um einzelne Sackhalbzeuge, zum Beispiel einzelne Schlauchstücke, zu Stationen zur Bodenbildung oder auch fertige Säcke, Beutel oder dergleichen (im Folgenden abkürzend nur als Säcke bezeichnet) zu transportieren. Oft sind etwa in Vorrichtungen zur Herstellung von Säcken, Beuteln oder dergleichen mehrere Transportvorrichtungen vorgesehen, um beispielsweise die Säcke in einer nachfolgenden Transporteinrichtung gegenüber der vorhergehenden Transporteinrichtung beschleunigt fortzubewegen.Generic transport facilities (See e.g. the document US3326735A ) are necessary in order to transport individual semi-finished sacks, for example individual tube pieces, to stations for bottom formation or also finished sacks, bags or the like (hereinafter referred to as sacks for short). In devices for the production of sacks, bags or the like, several transport devices are often provided, for example in order to move the sacks in a subsequent transport device at an accelerated rate compared to the preceding transport device.

Dabei kann es notwendig sein, dass Teile der Transporteinrichtungen, insbesondere ein sich in Transporteinrichtung erstreckendes Transportorgan, mit dem oder einem frisch hergestellten Boden in Berührung kommt bzw. insbesondere auf diesem aufliegt. Um den Transport eines Sackes sicherzustellen, drückt ein Transportorgan grundsätzlich den Sack mit einer Andrückkraft gegen eine Gegenlage.It may be necessary for parts of the transport devices, in particular a transport element extending in the transport device, to come into contact with the floor or a freshly produced floor or in particular to lie on it. In order to ensure the transport of a sack, a transport element basically presses the sack against a counter-surface with a pressing force.

Wenn diese Andrückkraft allerdings gegen den Boden wirkt, kann es bei geklebten Sackböden vorkommen, dass noch nicht verfestigter Klebstoff aus den verklebten Bereichen herausgedrückt wird und dabei den Sack mit dem Transportorgan verklebt. Bei geschweißten oder bei heißluftgesiegelten Säcken besteht diese Gefahr zwar nicht, aber Bereiche, die nicht miteinander verbunden werden sollten, können aufgrund der Wärmeeinwirkung dennoch miteinander verbunden werden (sogenanntes Verblocken). Solche Verbindungen können zwar zum Teil nachträglich manuell wieder gelöst werden, dennoch können nicht aufgefundene Verblockungen beispielsweise zu Störungen in Sackfüllautomaten führen.However, if this pressing force acts against the bottom, it can happen with glued sack bottoms that glue that has not yet solidified is pressed out of the glued areas and thereby glues the sack to the transport element. Welded or heat-sealed bags do not have this risk, but areas that should not be connected can still be connected due to the heat (so-called blocking). Although some of these connections can subsequently be manually released again, undetected blockages can still lead to malfunctions in bag filling machines, for example.

Die Aufgabe der vorliegenden Erfindung ist es daher, eine Transporteinrichtung und ein Verfahren zur Verfügung zu stellen, mit denen die Säcke sicher transportierbar sind und mit denen unerwünschte Verklebungen oder Verblockungen vermieden werden.The object of the present invention is therefore to provide a transport device and a method with which the sacks can be transported safely and with which undesired sticking or blocking can be avoided.

Die Aufgabe wird gelöst durch den Anspruch 1. Demnach ist bei einer durch den Oberbegriff des Anspruchs 1 definierten Transporteinrichtung vorgesehen, dass die durch das Transportorgan bereitgestellte Andrückkraft in zumindest einem Bereich des Bodens reduziert ist.The object is achieved by claim 1. Accordingly, in a transport device defined by the preamble of claim 1, it is provided that the pressing force provided by the transport member is reduced in at least one area of the floor.

Mit dieser Maßnahme wird der Sack erfindungsgemäß durch Auflage des Transportorgans auf einen Boden sicher transportiert. Der alternative Ansatz, dass das Transportorgan nicht auf dem Boden, sondern auf dem Sackkörper aufliegt, kann insbesondere bei fehlerhaft hergestellten Säcken zu Störungen führen, beispielsweise wenn ein Bodendeckblatt ausgeblieben ist und sich die Seitenlaschen hochstellen. Eine solche hochgestellte Seitenlasche kann zum Verhaken des Sacks in der Herstelleinrichtung führen, die oft nur manuell zu beseitigen ist. Mit der erfindungsgemäßen Maßnahme arbeitet eine Transporteinrichtung zuverlässiger als eine solche ohne die genannte Maßnahme.With this measure, the sack is transported safely according to the invention by placing the transport member on a floor. The alternative approach, that the transport element does not rest on the bottom but on the sack body, can lead to malfunctions, particularly in the case of incorrectly manufactured sacks, for example if a bottom cover sheet is missing and the side flaps stand up. Such a raised side flap can lead to the bag getting caught in the manufacturing device, which can often only be removed manually. With the measure according to the invention, a transport device works more reliably than one without the measure mentioned.

Eine auf den Boden wirkende Andrückkraft hat weiterhin den Vorteil, dass die frisch verklebten, verschweißten oder heißluftgesiegelten Säcke zusätzlich verpresst werden, um die Verbindung weiter zu festigen, so dass der Sack letztendlich stabiler gestaltet werden kann.A pressing force acting on the ground also has the advantage that the freshly glued, welded or hot-air sealed bags additionally be pressed to further strengthen the connection, so that the bag can ultimately be made more stable.

Darüber hinaus ist erfindungsgemäß vorgesehen, dass die Andrückkraft in Bereichen des Bodens reduziert ist. Solche Bereiche sind insbesondere Randbereiche von Verklebungen, so dass der Klebstoff hier nicht herausgedrückt wird. Bei geschweißten oder heißluftgesiegelten Säcken sind dies insbesondere Ventilöffnungen. Sobald wenigstens die Ventilöffnung auf die Fülllanze eines Füllautomaten aufgeschoben werden konnte, können bei der weiteren Aufschiebebewegung weitere, eventuell vorhandene Verblockungen gelöst werden. Beim Befüllen selbst können Verblockungen zwischen den Innenseiten des Bodens und einer Sackwandung gelöst werden.In addition, it is provided according to the invention that the pressing force is reduced in areas of the floor. Such areas are in particular edge areas of bonds, so that the adhesive is not squeezed out here. In the case of welded or hot-air sealed bags, these are in particular valve openings. As soon as at least the valve opening could be pushed onto the filling lance of an automatic filling machine, further blockages that may be present can be released during the further push-on movement. When filling itself, blockages between the inside of the bottom and a sack wall can be released.

Im Allgemeinen ist es vorteilhaft, wenn der Bereich des Bodens, in dem die beschriebene Andrückkraft reduziert ist, den Übergang von einer Anzahl an Lagen zu einer größeren oder kleineren Anzahl an Lagen umfasst. Denn solche Ränder von Lagen sind gewöhnlich die Stellen, an denen die größte Andrückkraft herrscht und daher hier die oben beschriebenen Effekte vornehmlich auftreten. Die Breite des Transportorgans (quer zur Transportrichtung gemessen) ist dabei vorzugsweise geringer als die Breite des Bodens, um ein starkes Verpressen der Falzkanten des Bodens zu vermeiden. Ein zu starkes Verpressen kann zu Beschädigungen dieser Falzkanten führen, welche dann beispielsweise beim Befüllen oder auch beim Abwurf eines befüllten Sacks aufplatzen könnten.In general, it is advantageous if the area of the base in which the pressing force described is reduced includes the transition from a number of layers to a larger or smaller number of layers. Because such edges of layers are usually the places where the greatest pressing force prevails and where the effects described above primarily occur here. The width of the transport element (measured transversely to the transport direction) is preferably less than the width of the base in order to avoid strong compression of the folded edges of the base. Excessive compression can lead to damage to these folded edges, which could then burst open, for example, when a filled sack is filled or dropped.

Um die oben genannten Nachteile insbesondere im Zusammenhang mit Füllautomaten zu vermeiden, ist es besonders bevorzugt, dass der Übergang von einer Anzahl an Lagen zu einer größeren oder kleineren Anzahl an Lagen das offene Ende eines Füllventils umfasst. Diese Maßnahme hilft dabei, die Qualität der gesamten Sackproduktion zu erhöhen.In order to avoid the disadvantages mentioned above, in particular in connection with filling machines, it is particularly preferred that the transition from a number of layers to a larger or smaller number of layers includes the open end of a filling valve. This measure helps to increase the quality of the entire sack production.

In weiterer Ausgestaltung ist vorgesehen, dass der Boden des Sacks oder des Beutels ein Kreuzboden oder ein Ventilkreuzbodensack ist. Mit anderen Worten ist der von der Transporteinrichtung transportierte Sack ein Kreuzbodensack und insbesondere ein Kreuzbodenventilsack. Da dessen Konstruktion und Herstellung vergleichsweise aufwändig ist, bestehen hier große Gefahren von unbeabsichtigten Verklebungen oder Verblockungen, wenn sie mit herkömmlichen Transportmitteln transportiert werden. Daher ist die Kombination der erfindungsgemäßen Transporteinrichtung mit Kreuzböden besonders vorteilhaft.In a further embodiment it is provided that the bottom of the sack or bag is a cross bottom or a valve cross bottom sack. In other words, the sack transported by the transport device is a cross-bottom sack and in particular a cross bottom valve sack. Since its construction and production is comparatively complex, there is a great risk of unintentional sticking or blocking if it is transported with conventional means of transport. The combination of the transport device according to the invention with cross bottoms is therefore particularly advantageous.

In einer weiteren Ausgestaltung der erfindungsgemäßen Transporteinrichtung sind zwei Transportorgane vorgesehen, wobei jedes Transportorgan auf jeweils einem Boden des Sacks oder des Beutels aufliegt. Anders ausgedrückt umfasst jeder Sack oder Beutel an beiden seiner Enden jeweils einen Boden, auf welchen jeweils wenigstens ein Transportorgan aufliegt. In diesem Fall wird die Aufgabe des sicheren Transports besonders gut gelöst.In a further embodiment of the transport device according to the invention, two transport elements are provided, with each transport element resting on a bottom of the sack or bag. In other words, each sack or bag comprises a base at both of its ends, on which at least one transport element rests. In this case, the task of safe transport is solved particularly well.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, dass mit der Transportvorrichtung Säcke oder Beutel transportierbar sind, welche heißsiegelfähiges Material umfasst. Ein heißsiegelfähiges Material zeichnet sich dadurch aus, dass durch Wärmeeinwirkung auf die Oberfläche des Materials dieses von der Oberfläche her leicht angeschmolzen wird, ohne dass das Material über die komplette Schichtdicke in die Schmelzeform überführt wird, wie es etwa beim Schweißen der Fall ist. Zwei im Bereich der Oberflächen angeschmolzene Sackbestandteile können dann aufeinander gelegt und verpresst werden, so dass beim Erkalten des Material eine feste Verbindung entsteht. Ein heißsiegelfähiges Material ist vorzugsweise ein Kunststoff, eine Kunststoffbeschichtung oder ein Kunststoffvlies. Insbesondere, wenn diese Kunststoffe Polyethylen (PE) umfassen oder enthalten, sind die oben beschriebenen Möglichkeiten gegeben.In a further embodiment of the invention, it is provided that the transport device can be used to transport sacks or bags which comprise heat-sealable material. A heat-sealable material is characterized by the fact that the surface of the material is slightly melted from the surface by the action of heat, without the material being converted into the molten form over the entire layer thickness, as is the case with welding, for example. Two parts of the bag that have melted in the area of the surfaces can then be placed on top of each other and pressed so that a firm connection is created when the material cools down. A heat-sealable material is preferably a plastic, a plastic coating or a plastic fleece. In particular, if these plastics comprise or contain polyethylene (PE), the possibilities described above are given.

Vorteilhaft ist es insbesondere, wenn mit der Transportvorrichtung Säcke oder Beutel transportierbar sind, welche ein Gewebe aus gereckten Polyolefinfäden und eine Beschichtung umfassen und insbesondere aus diesem Gewebe und dieser Beschichtung bestehen. Bei der Herstellung solcher Säcke besteht eine sehr große Gefahr des Verblockens, da solche Säcke bevorzugt durch den Einsatz eines Heißluftsiegelverfahrens herstellbar sind, wobei das Gewebe und insbesondere die Beschichtung, die durch die Heißluft erhitzt worden sind, erst langsam abkühlen. Die Erfindung verhindert hier also effektiv die Verblockung von Bereichen, die nicht miteinander verbunden werden sollten.It is particularly advantageous if the transport device can be used to transport sacks or bags which comprise a fabric made from stretched polyolefin threads and a coating and, in particular, consist of this fabric and this coating. In the manufacture of such sacks there is a very great risk of blocking, since such sacks are preferably manufactured using a hot air sealing process, the fabric and especially the coating that has been heated by the hot air, first cool down slowly. The invention thus effectively prevents the blocking of areas that should not be connected to one another.

Um die Andrückkraft zu reduzieren umfasst das Transportorgan in dem Bereich, in dem die Andrückkraft reduziert ist, Aussparungen, Ausnehmungen, Vertiefungen oder dergleichen. Bei ausreichender Tiefe dieser Aussparungen, Ausnehmungen, Vertiefungen oder dergleichen ist die Andrückkraft sogar auf 0 reduziert, was ebenfalls vorteilhaft ist. Zwar ist es auch denkbar und in einigen Fällen vorteilhaft, das Transportorgan an den beschriebenen Bereichen mit verminderter Andrückkraft vom Boden eines Sackes mit einer Abhebeeinrichtung abzuheben, jedoch sind Aussparungen, Ausnehmungen, Vertiefungen oder dergleichen einfacher zu realisieren und im Betrieb der Transporteinrichtung weniger verschleißanfällig.In order to reduce the pressing force, the transport element has recesses, recesses, indentations or the like in the area in which the pressing force is reduced. With sufficient depth of these recesses, recesses, indentations or the like, the pressing force is even reduced to 0, which is also advantageous. Although it is also conceivable and in some cases advantageous to lift the transport element from the bottom of a sack with a lifting device in the described areas with reduced pressing force, recesses, recesses, indentations or the like are easier to implement and less susceptible to wear during operation of the transport device.

In einer Alternative oder Ergänzung hierzu sind in der Umgebung der Bereiche, an denen die Andrückkraft reduziert ist, Erhöhungen an dem Transportorgan vorgesehen. Es versteht sich, dass diese Erhöhungen nicht in jenen Bereichen liegen dürfen, da die Erhöhungen eine erhöhte Andrückkraft zur Verfügung stellen. Gegenüber dieser erhöhten Andrückkraft ist die Andrückkraft in den genannten Bereichen reduziert. Solche Erhöhungen können langgestreckt sein. Es bietet sich an, dass diese quer zur Transportrichtung der Transportorgane verlaufen. Es kann in einer Ausführungsform vorgesehen sein, eine Vielzahl von Erhöhungen vorzusehen und in den genannten Bereichen mit reduzierter Andrückkraft einen großen Abstand zwischen zwei benachbarten Erhöhungen vorzusehen, welcher den genannten Bereich vollständig ausspart. Vorteilhaft ist es auch, wenn diese Erhöhungen lösbar an dem Transportorgan befestigt sind, um diese Erhöhungen versetzen oder durch andere Erhöhungen ersetzen zu können. Damit kann das erfindungsgemäße Transportorgan an die tatsächlich produzierte Bodengeometrie anpassbar sein. Die Erhöhungen können nachgiebiges Material umfassen, welches beispielsweise eine federartige Kraftwirkung entfaltet.As an alternative or supplement to this, elevations are provided on the transport element in the vicinity of the areas where the pressing force is reduced. It goes without saying that these elevations must not be in those areas since the elevations provide an increased pressing force. Compared to this increased pressing force, the pressing force is reduced in the areas mentioned. Such ridges can be elongated. It is advisable for these to run transversely to the transport direction of the transport elements. In one embodiment, provision can be made to provide a large number of elevations and to provide a large distance between two adjacent elevations in the areas mentioned with reduced pressing force, which completely leaves out the area mentioned. It is also advantageous if these elevations are releasably attached to the transport element in order to be able to move these elevations or replace them with other elevations. In this way, the transport element according to the invention can be adapted to the floor geometry that is actually produced. The elevations can comprise flexible material, which develops a spring-like force effect, for example.

Des Weiteren ist vorgesehen, dass das Transportorgan zumindest zwei Aussparungen, Ausnehmungen, Vertiefungen oder dergleichen umfasst, deren Abstand dem Abstand zweier mit der Transporteinrichtung transportierter Säcke oder Beutel entspricht. Mit dem "Abstand zweier Säcke" ist nicht der Leerraum zwischen zwei Säcken gemeint, sondern vielmehr der Abstand zweier gleicher Punkte oder Linien, wie etwa der Abstand der Vorderkanten zweier Säcke, wobei der Abstand parallel zur Transportrichtung zu messen ist.Furthermore, it is provided that the transport element comprises at least two recesses, recesses, indentations or the like, the distance between which corresponds to the distance between two sacks or bags transported with the transport device. The "distance between two sacks" does not mean the empty space between two sacks, but rather the distance between two equal points or lines, such as the distance between the leading edges of two sacks, the distance being measured parallel to the direction of transport.

In vorteilhafter Ausgestaltung des Transportorgans umfasst dieses wenigstens einen umlaufenden Transportriemen. Mit einem Transportriemen lässt sich die Erfindung besonders einfach realisieren, insbesondere wenn der Transportriemen Aussparungen, Ausnehmungen, Vertiefungen oder dergleichen umfasst. Solche Aussparungen, Ausnehmungen, Vertiefungen oder dergleichen lassen sich einfach im Herstellungsprozess des Transportriemens berücksichtigen. Alternativ dazu lassen sich die Aussparungen, Ausnehmungen, Vertiefungen oder dergleichen nachträglich, beispielsweise durch eine spanende Bearbeitung, in den Transportriemen einbringen. Bei der letztgenannten Alternative können insbesondere bereits vorhandene Transporteinrichtungen erfindungsgemäß verwendet werden, indem die Transportriemen nachträglich gemäß der oben beschriebenen Alternative ausgestaltet werden.In an advantageous embodiment of the transport element, this comprises at least one circulating transport belt. The invention can be implemented in a particularly simple manner with a transport belt, in particular if the transport belt comprises cutouts, recesses, indentations or the like. Such gaps, recesses, indentations or the like can easily be taken into account in the manufacturing process of the conveyor belt. As an alternative to this, the recesses, recesses, indentations or the like can be introduced into the transport belt subsequently, for example by machining. In the case of the last-mentioned alternative, transport devices that are already present can in particular be used according to the invention by subsequently designing the transport belts in accordance with the alternative described above.

Ferner kann es vorteilhaft sein, wenn die Gegenlage wenigstens einen umlaufenden Transportriemen umfasst. Dieser ist vorzugsweise mit gleicher Transportgeschwindigkeit wie das oben beschriebene, als Transportriemen ausgestaltete Transportorgan zu bewegen, so dass die Säcke zuverlässig und sicher transportiert werden können.Furthermore, it can be advantageous if the counter-surface comprises at least one circulating transport belt. This is preferably to be moved at the same transport speed as the transport member described above, which is designed as a transport belt, so that the sacks can be transported reliably and safely.

Allgemein kann es jedoch vorteilhaft sein, auch die Gegenlage analog zum Transportorgan auszugestalten. Das bedeutet, dass auch die Gegenkraft, die die Gegenlage dem Transportorgan zur Verfügung stellt, in zumindest einem Bereich des Bodens reduziert ist.In general, however, it can be advantageous to also design the counter-position analogously to the transport element. This means that the counteracting force that the counterposition makes available to the transport element is also reduced in at least one area of the floor.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung gehen aus der nachfolgenden Beschreibung hervor, in der unter Bezugnahme auf die Figuren verschiedene Ausführungsbeispiele im Einzelnen erläutert sind. Die in den Ansprüchen und in der vorangegangenen sowie in der nachfolgenden Beschreibung erwähnten Merkmale können jeweils einzeln für sich oder in beliebigen Kombinationen erwähnter Merkmale erfindungswesentlich sein. Im Rahmen der gesamten Offenbarung gelten Merkmale und Einzelheiten, die im Zusammenhang mit der erfindungsgemäßen Transporteinrichtung beschrieben sind, selbstverständlich auch im Zusammenhang mit dem erfindungsgemäßen Verfahren und/oder im Zusammenhang mit der Vorrichtung zur Herstellung von Säcken oder Beuteln und jeweils umgekehrt, so dass bezüglich der Offenbarung zu den einzelnen Aspekten der Erfindung stets wechselseitig Bezug genommen wird beziehungsweise werden kann. Die einzelnen Figuren zeigen:

Fig. 1
Draufsicht auf eine Übergabestation mit einer ersten Transportvorrichtung und einer erfindungsgemäßen, zweiten Transportvorrichtung.
Fig. 2
Seitenansicht einer Übergabestation nach Figur 1
Fig. 3
Detailansicht eines Sacks, der mit der erfindungsgemäßen Transporteinrichtung transportiert wird
Fig. 4
Detailansicht eines Sacks, der mit einer weiteren erfindungsgemäßen Transporteinrichtung transportiert wird
Fig. 5
Detailansicht eines Sacks, der mit einer weiteren erfindungsgemäßen Transporteinrichtung transportiert wird
Fig. 6
Vorrichtung zur Herstellung von Säcken oder Beuteln
Further advantages, features and details of the invention emerge from the following description, in which various exemplary embodiments are explained in detail with reference to the figures. The features mentioned in the claims and in the preceding and in the following description can each be essential to the invention individually or in any combination of features mentioned. Within the scope of the entire disclosure, features and details that are described in connection with the transport device according to the invention also apply, of course, in connection with the method according to the invention and/or in connection with the device for producing sacks or bags and vice versa, so that with regard to the Disclosure of the individual aspects of the invention is always mutually referred to or can be. The individual figures show:
1
Top view of a transfer station with a first transport device and a second transport device according to the invention.
2
Side view of a transfer station figure 1
3
Detailed view of a sack that is transported with the transport device according to the invention
4
Detailed view of a sack that is transported with another transport device according to the invention
figure 5
Detailed view of a sack that is transported with another transport device according to the invention
6
Device for making sacks or bags

Die Fig. 1 zeigt eine Übergabestation 100 mit einer ersten Transportvorrichtung 101, mit welcher wenigstens ein Sack 102 transportierbar ist. Eine solche Transportvorrichtung 101 wird vorzugsweise eingesetzt, um Säcke zu verschiedenen Bearbeitungsstationen innerhalb einer in der Figur 4 gezeigten Vorrichtung zur Herstellung von Säcken oder Beuteln zu transportieren. Die Transportvorrichtung umfasst dabei vorzugsweise zwei Transportriemenpaare 103 und 103', die jeweils einen Oberriemen 104, 104' und einen Unterriemen 105 und 105' umfassen. Auf den Ober- und Unterriemen eines Transportriemenpaares 103 bzw. 103' wirkt jeweils eine in die Richtung des jeweils anderen Riemens wirkende Kraft, so dass sichergestellt ist, dass der Sack 102 sich nicht relativ zu der Transportvorrichtung bewegt. Hierzu kann, wie in der Figur 1 gezeigt ist, der Unterriemen mit Magneten besetzt sein und der Oberriemen ein magnetisierbares Material enthalten, so dass eine magnetische Anziehungskraft zwischen beiden Riemen herrscht.the 1 shows a transfer station 100 with a first transport device 101, with which at least one sack 102 can be transported. Such Transport device 101 is preferably used to transport bags to different processing stations within one in the figure 4 transport device shown for the production of sacks or bags. The transport device preferably includes two pairs of transport belts 103 and 103', each of which includes an upper belt 104, 104' and a lower belt 105 and 105'. A force acting in the direction of the respective other belt acts on the upper and lower belts of a pair of transport belts 103 and 103', so that it is ensured that the bag 102 does not move relative to the transport device. For this purpose, as in the figure 1 is shown, the lower belt can be fitted with magnets and the upper belt can contain a magnetizable material, so that there is a magnetic attraction force between the two belts.

Beispielsweise im Zusammenhang mit dem Stapeln mehrerer Säcke zum einfacheren Verpacken derselben ist eine weitere Transportvorrichtung 110 vorgesehen, die gemäß der bereits oben beschriebenen Erfindung ausgestaltet ist. In dieser Transportvorrichtung 110 können die Säcke schneller als in der ersten Transportvorrichtung 101 transportiert werden, so dass zwei aufeinanderfolgende Säcke einen für die Stapelung ausreichend großen Abstand zueinander einnehmen. Die Transportvorrichtung 110 umfasst zwei Transportriemenpaare 111 und 111', die jeweils einen Oberriemen 112 und 112' sowie einen Unterriemen 113 und 113' umfassen, wobei der jeweilige Unterriemen 113, 113' als Gegenlage für den jeweiligen Oberriemen 112, 112' dient, wobei der Sack zwischen dem Oberriemen und dem zugehörigen Unterriemen transportiert wird. Durch verschiedene Maßnahmen kann vermieden werden, dass die Säcke sich relativ zu den Transportriemenpaaren 111, 111' bewegen. Eine Maßnahme kann eine Haftkraft vermittelnde Beschichtung der Transportriemen 112, 112', 113, 113' sein. Eine weitere Maßnahme können Einrichtungen sein, welche den einzelnen Transportriemen mit jeweils einer Kraft beaufschlagen, die in Richtung des jeweils anderen Riemens gerichtet ist. Solche Einrichtungen können Andruckrollen sein, die federnd gelagert sind und auf die Rückseiten der Riemen drücken.For example, in connection with the stacking of several sacks for easier packaging of the same, a further transport device 110 is provided, which is designed according to the invention already described above. In this transport device 110, the sacks can be transported faster than in the first transport device 101, so that two consecutive sacks are at a sufficiently large distance from one another for stacking. The transport device 110 comprises two pairs of transport belts 111 and 111', each comprising an upper belt 112 and 112' and a lower belt 113 and 113', with the respective lower belt 113, 113' serving as a counter-layer for the respective upper belt 112, 112', the Bag is transported between the upper belt and the associated lower belt. Various measures can be taken to prevent the sacks from moving relative to the transport belt pairs 111, 111'. One measure can be a coating of the transport belts 112, 112', 113, 113' that imparts adhesive force. A further measure can be devices which apply a force to the individual conveyor belts, which is directed in the direction of the other belt. Such devices can be pinch rollers that are spring mounted and press on the backs of the belts.

Die Oberriemen 112, 112' und die Unterriemen 113, 113' sind in dieser Ansicht der Übersichtlichkeit halber unterschiedlich breit dargestellt, können aber in der praktischen Umsetzung eine gleiche Breite aufweisen. Die Breite dieser Riemen entspricht dabei vorzugsweise der kleinsten, in der Vorrichtung zur Herstellung von Säcken oder Beuteln herstellbaren Bodenbreite. Diese kleinste Bodenbreite ist vorzugsweise größer als 60 mm, insbesondere größer als 75 mm. In dieser Konfiguration ist es für alle in der Vorrichtung herstellbaren Sackbreiten möglich, den Sackboden mit einer Kraft zu beaufschlagen, die ein Verpressen des Bodens zu dessen besseren Haltbarkeit ermöglicht. Es kann aber auch vorteilhaft sein, wenn die Breite dieser Riemen etwas geringer ist als die kleinste, in der Vorrichtung zur Herstellung von Säcken oder Beuteln herstellbare Bodenbreite. Von den oben genannten Zahlenwerten ist dann vorzugsweise bis zu 10 mm abzuziehen. Diese Maßnahme dient der Vermeidung der Beschädigung der Falzkanten. Im Falle von Säcken aus beschichtetem Polyolefingewebe spricht man bei solchen Beschädigungen auch von Kantenbruch.The upper straps 112, 112' and the lower straps 113, 113' are shown with different widths in this view for the sake of clarity, but can have the same width in practical implementation. The width of these belts preferably corresponds to the smallest bottom width that can be produced in the device for producing sacks or bags. This smallest floor width is preferably greater than 60 mm, in particular greater than 75 mm. In this configuration, it is possible for all bag widths that can be produced in the device to apply a force to the bottom of the bag that allows the bottom to be pressed for better durability. However, it can also be advantageous if the width of these belts is somewhat smaller than the smallest bottom width that can be produced in the device for producing sacks or bags. Preferably, up to 10 mm should then be deducted from the numerical values given above. This measure serves to avoid damage to the folded edges. In the case of sacks made of coated polyolefin fabric, such damage is also referred to as a broken edge.

Wie der Figur 1 weiterhin zu entnehmen ist, liegen die Oberriemen 112, 112' auf den Böden 120, 120' des Sacks 102 auf, während die Unterriemen 113, 113' mit der nicht sichtbaren Rückwand des Sackkörpers 121 in Kontakt stehen. Mit anderen Worten liegen die Böden 120, 120' parallel zur Ebene, die durch den Sackkörper 121 aufgespannt wird. Der Sack 102 wird dabei im so genannten Quertransport gefördert. Das bedeutet, dass die Sacklängsachse quer zur Transportrichtung z ausgerichtet ist.Again figure 1 It can also be seen that the upper straps 112, 112' lie on the bottoms 120, 120' of the sack 102, while the lower straps 113, 113' are in contact with the rear wall of the sack body 121, which is not visible. In other words, the bottoms 120, 120' are parallel to the plane that is spanned by the bag body 121. The sack 102 is conveyed in the so-called transverse transport. This means that the longitudinal axis of the bag is aligned transversely to the transport direction z.

Die Figur 2 zeigt die bereits in der Figur 1 dargestellte Übergabestation 100 in der Seitenansicht, wobei der Sack 102 nicht dargestellt ist. Die Bezugszeichen der Transportriemenpaare und der einzelnen Riemen wurden aus der Figur 1 übernommen. Der Oberriemen 104' des Transportriemenpaares 103', welches vorzugsweise ein Stahlband ist, wird über ein Umlenkrad 201 geführt, welches in der Rotationsrichtung R1 rotiert und dabei angetrieben sein kann. Der Unterriemen 105' wird über das Umlenkrad 202 geführt, welches in Rotationsrichtung R2 rotiert. Auch dieses Umlenkrad 202 kann angetrieben sein. Für die in dieser Figur 2 nicht sichtbaren Oberriemen 104 und Unterriemen 105 sind gleiche Umlenkräder wie die Umlenkräder 201, 202 vorgesehen, wobei die Umlenkräder für die Oberriemen auf einer gemeinsamen Achse angeordnet sein können. Gleiches gilt für die Umlenkräder für die Unterriemen.the figure 2 shows the already in the figure 1 shown transfer station 100 in side view, wherein the bag 102 is not shown. The reference numbers of the conveyor belt pairs and the individual belts were from figure 1 accepted. The upper belt 104' of the transport belt pair 103', which is preferably a steel belt, is guided over a deflection wheel 201, which rotates in the direction of rotation R1 and can be driven in the process. The lower belt 105' is guided over the deflection wheel 202, which rotates in the direction of rotation R2. This deflection wheel 202 can also be driven. For those in this figure 2 invisible top strap 104 and The lower belts 105 are provided with the same deflection wheels as the deflection wheels 201, 202, it being possible for the deflection wheels for the upper belts to be arranged on a common axis. The same applies to the deflection wheels for the lower belts.

Der Oberriemen 112' des Transportriemenpaares 111' wird über das Umlenkrad 203 geführt, welches in Rotationsrichtung R3 rotiert. Weiterhin wird der Unterriemen 112' der Transportriemenpaares 111' über das Umlenkrad 204 geführt, welches in Rotationsrichtung R4 rotiert. Wie im Falle des Transportriemenpaares 103' können die Umlenkräder des Transportriemenpaares 111' antreibbar sein. Es versteht sich, dass die Ober- und Unterriemen der Transportriemenpaare 103, 103', 111, 111' über weitere Umlenkmittel wie etwa weitere Umlenkräder oder -rollen umlenkbar sind, da die Ober- und Unterriemen vorzugsweise umlaufend sind.The upper belt 112' of the transport belt pair 111' is guided over the deflection wheel 203, which rotates in the direction of rotation R3. Furthermore, the lower belt 112' of the transport belt pair 111' is guided over the deflection wheel 204, which rotates in the direction of rotation R4. As in the case of the transport belt pair 103', the deflection wheels of the transport belt pair 111' can be drivable. It goes without saying that the upper and lower belts of the transport belt pairs 103, 103', 111, 111' can be deflected via further deflection means such as further deflection wheels or rollers, since the upper and lower belts are preferably circulating.

Das Umlenkrad 203 ist in vertikaler Richtung von der Transportebene der Säcke beabstandet, d. h. dass der Oberriemen 112' nach dem Verlassen des Umlenkrades 203 noch nicht im Kontakt mit den Säcken steht. Ein Kontakt ist dadurch herstellbar, dass eine Umlenkrolle 205 vorgesehen ist, über welche der Oberriemen 112' zusätzlich führbar ist, so dass die Umlenkrolle 205 den Oberriemen 112' auf den Sack drückt. Auf diese Weise bilden der Unterriemen 113' und der zwischen dem Umlenkrad 203 und der Umlenkrolle 205 laufende Teil des Oberriemens 112' einen Einlauftrichter für einen Sack 102, um diesen sicher zu erfassen, ohne dass es zu einem Verknicken oder Verziehen des Sacks kommt.The deflection wheel 203 is vertically spaced from the transport plane of the sacks, i. H. that the upper belt 112' is not yet in contact with the sacks after leaving the deflection wheel 203. Contact can be established by providing a deflection roller 205 over which the top belt 112' can also be guided, so that the deflection roller 205 presses the top belt 112' onto the sack. In this way, the lower belt 113' and the part of the upper belt 112' running between the deflection wheel 203 and the deflection roller 205 form an inlet funnel for a sack 102 in order to reliably grasp it without the sack buckling or warping.

Die Umlenkrolle 205 ist an einer Position in Transportrichtung z angeordnet, an der der Unterriemen 105' des Transportriemenpaares noch nicht oder gerade eben in Kontakt mit dem Umlenkrad 202 kommt. Auf diese Weise ist eine Überlappung der Transportvorrichtungen 101 und 110 sichergestellt, so dass der Sack 102 während der Übergabe zu keinem Zeitpunkt ohne ausreichende Haltekräfte geführt wird. Damit wird ebenfalls ein Verknicken von Teilen des Sackes oder eine Änderung der relativen Lage des Sacks 102 zu den Transporteinrichtungen vermieden.The deflection roller 205 is arranged at a position in the transport direction z at which the lower belt 105 ′ of the transport belt pair does not yet come into contact with the deflection wheel 202 or just about. In this way, an overlapping of the transport devices 101 and 110 is ensured, so that the bag 102 is never guided without sufficient holding forces during the transfer. This also avoids buckling of parts of the sack or a change in the position of the sack 102 relative to the transport devices.

Die Figur 3 zeigt nun den Oberriemen 112' und den Unterriemen 113' des Transportriemenpaares 111' im Detail. Das Transportriemenpaar 111 ist vorzugsweise in gleicher Weise ausgestaltet. In dieser Figur 3 ist zusätzlich ein Sack 102 gezeigt, der zwischen den beiden Riemen 112' und 113' klemmend fortbewegt wird. Auf den dem Sack 102 abgewandten Seiten der Riemen sind zahlreiche, äquidistant angeordnete Zähne 301 zu erkennen, die darauf hinweisen, dass die Riemen als Zahnriemen ausgestaltet sein können, um eine Relativbewegung der Riemen zu den zugehörigen Umlenkrädern zu vermeiden, die entsprechend als Zahnräder ausgestaltet sein können.the figure 3 now shows the upper belt 112' and the lower belt 113' of the transport belt pair 111' in detail. The transport belt pair 111 is preferably designed in the same way. In this figure 3 a sack 102 is additionally shown, which is moved forward in a clamping manner between the two belts 112' and 113'. Numerous, equidistantly arranged teeth 301 can be seen on the sides of the belts facing away from the bag 102, which indicate that the belts can be designed as toothed belts in order to avoid a relative movement of the belts to the associated deflection wheels, which are accordingly designed as gear wheels be able.

Der Sack 102 kann mit einem Ventil 122 ausgestattet sind, welches Bestandteil eines der beiden Böden 120, 120' sein kann. Das Ventil ist dabei ein schlauchförmiges Stück, welches einen Zugang von außen in das Innere des Sacks 102 sicherstellt, um diesen Befüllen zu können, aber auch um später einen Austritt des Produkts zu vermeiden. Zum Befüllen ist es daher, dass der Zugang durch das Ventil nicht versperrt wird, etwa dadurch, dass sich die Lagen des Ventils miteinander verbinden.The sack 102 can be equipped with a valve 122 which can be part of one of the two bases 120, 120'. The valve is in this case a tubular piece which ensures access from the outside into the interior of the sack 102 in order to be able to fill it, but also to prevent the product from escaping later. It is therefore convenient for filling that access through the valve is not blocked, for example by the layers of the valve connecting to one another.

In dem Oberriemen 112' ist eine Aussparung 302 eingebracht, was zur Folge hat, dass der Oberriemen in diesem Bereich den Sack nicht oder zumindest mit reduzierter Kraft gegen den Unterriemen 113' drückt. Die Aussparung 302 kann etwa durch eine spanende Bearbeitung hergestellt werden. Die Tiefe der Aussparung kann dabei mindestens 1 mm, vorzugsweise jedoch mindestens 5 mm betragen. Oft sind Riemen, die in Transportriemenpaaren Verwendung finden, durch Metalldrähte verstärkt, um die Längsdehnfähigkeit der Riemen zu reduzieren. In diesem Fall ist die Tiefe der Aussparung lediglich so groß, dass die Metalldrähte noch mit mindestens 1 mm Material bedeckt sind. Damit wird eine Korrosion der Metalldrähte vermieden. Das angesprochene Material des Riemens kann ein Gummi oder ein Kunststoff, wie etwa Polyurethan, umfassen. Diese Materialien sind leicht nachträglich zu bearbeiten.A recess 302 is made in the upper belt 112', with the result that the upper belt does not press the sack against the lower belt 113' in this area, or at least with reduced force. The recess 302 can be produced, for example, by machining. The depth of the recess can be at least 1 mm, but preferably at least 5 mm. Belts that are used in pairs of conveyor belts are often reinforced with metal wires in order to reduce the longitudinal stretching capacity of the belt. In this case, the depth of the recess is only so great that the metal wires are still covered with at least 1 mm of material. This prevents corrosion of the metal wires. The material of the belt referred to may comprise a rubber or a plastic such as polyurethane. These materials are easy to edit afterwards.

Die Lage der Aussparung ist so gewählt, dass diese die Vorderkante 123 des Ventils 122 überdeckt. Gerade an der Vorderkante 123 ist das Verpressen innerhalb der Transporteinrichtung 101 kritisch, denn wenn an der Vorderkante die Lagen des Ventils miteinander verbunden sind, kann ein Füllrohr einer Fülleinrichtung keinen Zugang zum Inneren des Sacks 102 erhalten. Im hinteren Bereich des Ventils ist eine Verbindung nicht sehr kritisch, da ein Füllrohr, das im vorderen Bereich in das Ventil eingeführt werden konnte, eine solche Verbindung wieder trennen kann. Deshalb kann die Aussparung im, in Transportrichtung z gesehen, hinteren Bereich das Ventil überdecken, wie es beispielsweise in der Figur 3 zu erkennen ist. Es ist daher vorgesehen, dass, in Transportrichtung gesehen, die Aussparung wenigstens 1 cm, vorzugsweise jedoch wenigstens 5 cm lang ist. Ferner ist vorgesehen, dass die Aussparung maximal 20 cm lang ist, insbesondere maximal 15 cm, um die Zugfestigkeit des Riemens nicht über Gebühr herabzusetzen. Die Breite der Aussparung quer zur Transportrichtung entspricht vorzugsweise der Breite des Riemens, d. h. dass in den Seitenbereichen des Riemens keine Stege oder ähnliches verbleiben. In einer anderen Ausführungsform können auch Stege, vorzugsweise mit einer Breite von maximal 1 cm, vorteilhaft sein, um die Festigkeit des Riemens im Vergleich zu Riemen ohne Aussparungen 302 wenigstens teilweise beizubehalten.The position of the cutout is chosen so that it covers the front edge 123 of the valve 122 . Just at the front edge 123 is the pressing within the transport device 101 is critical, because if the layers of the valve are connected to one another at the front edge, a filling tube of a filling device cannot gain access to the interior of the sack 102. A connection in the rear area of the valve is not very critical, since a filling tube that could be inserted into the valve in the front area can separate such a connection again. Therefore, the recess in the, seen in the transport direction z, cover the rear area of the valve, as is the case, for example, in FIG figure 3 can be seen. It is therefore provided that, seen in the direction of transport, the recess is at least 1 cm long, but preferably at least 5 cm long. Furthermore, it is provided that the recess is a maximum of 20 cm long, in particular a maximum of 15 cm, in order not to reduce the tensile strength of the belt excessively. The width of the recess transverse to the direction of transport preferably corresponds to the width of the belt, ie no webs or the like remain in the side areas of the belt. In another embodiment, webs, preferably with a maximum width of 1 cm, can also be advantageous in order to at least partially maintain the strength of the belt compared to belts without recesses 302 .

In der Figur 3 ist lediglich eine Aussparung gezeigt, jedoch sind weitere Aussparungen vorgesehen, die, wie bereits oben beschrieben wurde, vorzugsweise im Taktabstand zweier aufeinanderfolgende Säcke angeordnet sind.In the figure 3 only one recess is shown, but further recesses are provided which, as already described above, are preferably arranged at the pitch of two consecutive sacks.

In der Figur 4 ist nun eine alternative Ausführungsform der Erfindung dargestellt. Im Gegensatz zur in der Figur 3 dargestellten Ausführungsform wurde hier auf eine Aussparung oder dergleichen verzichtet. Hingegen ist nun der Oberriemen 112' mit Erhöhungen 310 besetzt. Dementsprechend liegt nun nicht der komplette Oberriemen 112' an dem Boden an, sondern nur diese Erhöhung 310, die nun den Sack 102 bzw. dessen Boden gegen den Unterriemen 113' drückt. Damit wird nun anstelle einer kontinuierlichen Andrückkraft eine linienartige oder punktuelle Andrückkraft bereitgestellt. Es ist zu erkennen, dass in Transportrichtung z die Erhöhungen 310 einen gleichmäßigen, vorzugsweise konstanten Abstand zueinander haben. Lediglich im Bereich 311, in dem die Andrückkraft reduziert ist, haben zwei benachbarte Erhöhungen 310 einen vergrößerten Abstand. Mit anderen Worten begrenzen diese beiden Erhöhungen den Bereich 311.In the figure 4 there is now shown an alternative embodiment of the invention. In contrast to in the figure 3 illustrated embodiment was omitted here on a recess or the like. On the other hand, the upper belt 112' now has elevations 310. Accordingly, the entire top belt 112' does not lie against the bottom, but only this elevation 310, which now presses the sack 102 or its bottom against the bottom belt 113'. Thus, instead of a continuous pressing force, a linear or punctiform pressing force is now provided. It can be seen that the elevations 310 have a uniform, preferably constant distance from one another in the transport direction z. Only in the area 311, in which the pressing force is reduced, two adjacent elevations 310 have an increased distance. In other words, these two increases delimit the area 311.

Die Figur 5 zeigt eine nicht erfindungsgemäße Abwandlung der in der Figur 4 gezeigten Ausführungsform der Erfindung. Hier sind Erhöhungen 320 zu erkennen. Diese Erhöhungen 320 können niedriger ausgestaltet sein als die Erhöhungen 310 in der Figur 4. Weitere Erhöhungen sind jedoch nicht vorgesehen, so dass der Oberriemen 112' in diesem Ausführungsbeispiel außerhalb des Bereiches, in dem die Andrückkraft reduziert ist, auf dem Boden aufliegt. Aufgrund der Flexibilität des Riemens ist dieser durch die Erhöhungen 320 etwas ausgelenkt, was jedoch für die Betriebssicherheit nicht problematisch ist. Auch in diesem Ausführungsbeispiel ist der Bereich, in dem die Andrückkraft reduziert ist, durch die Erhöhungen 320 begrenzt.the figure 5 shows a non-inventive modification in the figure 4 shown embodiment of the invention. Elevations 320 can be seen here. These increases 320 can be configured lower than the increases 310 in the figure 4 . However, no further elevations are provided, so that in this exemplary embodiment the upper belt 112′ rests on the floor outside of the area in which the pressing force is reduced. Because of the flexibility of the belt, it is slightly deflected by the elevations 320, but this is not problematic for operational safety. The area in which the pressing force is reduced is also limited by the elevations 320 in this exemplary embodiment.

Die Erhöhungen 310, 320 in den Ausführungsbeispielen der Figuren 4 und 5 können fest an dem Oberriemen 112' angeordnet oder lösbar sein. Letzteres dient dazu, um die Andrückkraft an die Dimensionen des Bodens anpassen zu können. Die Erhöhungen 310, 320 können einzelne, in Reihe angeordnete Noppen sein. Alternativ können längliche Erhöhungen, wie etwa Stäbe oder Stangen vorgesehen sein. Die länglichen Erhöhungen und/oder die in Reihe angeordneten Noppen erstrecken sich vorteilhafterweise quer zur Transportrichtung z auf der Oberfläche des Oberriemens 112'The increases 310, 320 in the embodiments of Figures 4 and 5 may be fixed to the top strap 112' or detachable. The latter serves to adapt the pressing force to the dimensions of the floor. The elevations 310, 320 can be individual knobs arranged in a row. Alternatively, elongate ridges such as rods or rods may be provided. The elongated elevations and/or the nubs arranged in a row advantageously extend transversely to the transport direction z on the surface of the upper belt 112'

Die Figur 6 zeigt nun eine Vorrichtung zur Herstellung von Säcken oder Beuteln 401.the figure 6 now shows a device for the production of sacks or bags 401.

Zunächst wird ein Materialschlauch 402 der Vorrichtung 401 zugeführt. Dies geschieht vorteilhafterweise durch Abwickeln des einen Wickel 403 bildenden Materialschlauches in einer Abwicklungseinrichtung 404. Anschließend kann der Schlauch 402 die so genannte Öffnung in der Öffnungsstation 405 erfahren. Dabei wird der Materialschlauch 402 um ein Innenwerkzeug herum geführt, welches die beiden Lagen voneinander trennt, so dass sich die Lagen, falls sie bei einem der Herstellungsschritte des Materialschlauchs 402 miteinander verklebt wurden, trennen. Nur bei getrennten Lagen kann sichergestellt werden, dass die folgenden Produktionsschritte ordnungsgemäß durchgeführt werden können. Im Anschluss werden die voneinander getrennten Materiallagen des Schlauches wieder aufeinander gelegt.First, a material hose 402 is fed to the device 401 . This is advantageously done by unwinding the tube of material forming a coil 403 in an unwinding device 404 . The tube 402 can then experience the so-called opening in the opening station 405 . In this case, the material tube 402 is guided around an inner tool, which separates the two layers from one another, so that the layers, if they are connected to one another during one of the manufacturing steps of the material tube 402 were glued, separate. Only with separate layers can it be ensured that the following production steps can be carried out properly. The separate material layers of the hose are then placed on top of each other again.

Der Materialschlauch 402 wird nun der Querschneideeinrichtung 406 zugeführt, die den Materialschlauch 402 in einzelne Schlauchstücke vereinzelt.The tube of material 402 is now fed to the cross-cutting device 406, which separates the tube of material 402 into individual tube pieces.

Anschließend erfolgt in einer Richtungswechselstation 407 eine Änderung der ursprünglichen Transportrichtung x, in der der Schlauch bzw. die Schlauchstücke in Richtung ihrer Längsachsen transportiert wurden, in die neue Transportrichtung z, so dass die Schlauchstücke nun nicht mehr in Richtung x ihrer Schlauchlängsachse (im Folgenden auch Erstreckungsrichtung der Schlauchstücke genannt), sondern quer hierzu transportiert werden, so dass die Enden der Schlauchstücke zwecks Anformung von Böden 120, 120' (siehe Figur 1) seitlich erreichbar sind.Then, in a direction-changing station 407, the original transport direction x, in which the tube or the tube pieces were transported in the direction of their longitudinal axes, is changed to the new transport direction z, so that the tube pieces are no longer in the direction x of their tube longitudinal axis (hereinafter also Extension direction of the tube pieces called), but are transported transversely thereto, so that the ends of the tube pieces for the purpose of forming bases 120, 120 '(see figure 1 ) are accessible from the side.

In der folgenden Station, der Bodenöffnungsstation 408, werden beide Enden eines jeden Schlauchstücks geöffnet und die so genannten Bodenrechtecke gelegt. In der darauf folgenden Ventilstation 409 wird auf eines der beiden offenen Enden ein Ventil 122 aufgelegt und befestigt. Die offenen Böden werden nun in der Bodenschließstation 410 geschlossen, wobei zwei Laschen aufeinander gelegt werden. Falls es gewünscht ist, können die Laschen zusätzlich miteinander dauerhaft, beispielsweise durch Verschweißen, verbunden werden. Den Abschluss des eigentlichen Sackherstellprozesses bildet das Aufbringen je eines Bodendeckblattes auf die Böden in der Deckblattstation 411. Dazu können die Deckblätter ebenfalls aufgeschweißt oder mittels Heißluftzufuhr aufgesiegelt werden. Die fertigen Säcke werden anschließend von der Transporteinrichtung 110 übernommen, von dieser auf dem Sackstapel 413 abgelegt und von dort auf nicht näher beschriebene Weise abtransportiert. Bezugszeichenliste 100 Übergabestation 101 Transportvorrichtung 102 Sack 103, 103' Transportriemenpaar 104, 104' Oberriemen 105, 105' Unterriemen 110 Transportvorrichtung 111, 111' Transportriemenpaar 112, 112' Oberriemen 113, 113' Unterriemen 120, 120' Sackboden 121 Sackkörper 122 Ventil 123 Vorderkante 201 Umlenkrad 202 Umlenkrad 203 Umlenkrad 204 Umlenkrad 205 Umlenkrolle 301 Zähne 302 Aussparung 310 Erhöhung 311 Bereich 320 Erhöhung 401 Vorrichtung zur Herstellung von Säcken oder Beuteln 402 Materialschlauch 403 Wickel 404 Abwicklungseinrichtung 405 Öffnungsstation 406 Querschneideeinrichtung 407 Richtungswechselstation 408 Bodenöffnungsstation 409 Ventilstation 410 Bodenschließstation 411 Deckblattstation 413 Sackstapel In the following station, the bottom opening station 408, both ends of each piece of tubing are opened and the so-called bottom rectangles are placed. In the subsequent valve station 409, a valve 122 is placed and fastened on one of the two open ends. The open bottoms are now closed in the bottom closing station 410, with two flaps being placed one on top of the other. If desired, the tabs can additionally be permanently connected to each other, for example by welding. The final step in the actual sack manufacturing process is the application of a base cover sheet to each base in the cover sheet station 411. For this purpose, the cover sheets can also be welded on or sealed on by means of a hot air supply. The finished sacks are then taken over by the transport device 110, placed by it on the sack stack 413 and transported away from there in a manner not described in detail. Reference List 100 transfer station 101 transport device 102 bag 103, 103' transport belt pair 104, 104' top strap 105, 105' bottom strap 110 transport device 111, 111' transport belt pair 112, 112' top strap 113, 113' bottom strap 120, 120' sack bottom 121 sack body 122 Valve 123 leading edge 201 deflection wheel 202 deflection wheel 203 deflection wheel 204 deflection wheel 205 pulley 301 teeth 302 recess 310 increase 311 area 320 increase 401 Device for making sacks or bags 402 material hose 403 wrap 404 settlement facility 405 opening station 406 cross cutting device 407 direction change station 408 bottom opening station 409 valve station 410 floor closing station 411 cover station 413 pile of sacks

Claims (6)

  1. A transport device (101) for transporting sacks or bags, comprising at least one transport element extending in the transport direction (z), which lies on a bottom (120, 120') of the sack (102) or bag, and a counter position against which the transport element presses the sack (102) or bag by means of a pressing force,
    characterized in
    that the transport element comprises cutouts, recesses or depressions, so that the pressing force is reduced at these points in at least one region of the bottom (120, 120'), and/or
    that elongated elevations or nubs arranged in series, are provided on the transport element, so that only with said elongated elevations or nubs can the sack or bag be pressed by means of a pressing force against the counter position.
  2. The transport device (101) according to claim 1,
    characterized in that
    the transport element comprises at least two cutouts, recesses or depressions, the distance between which corresponds to the distance between two sacks (102) or bags transported by means of the transport device (101).
  3. The transport device (101) according to any one of the preceding claims, characterized in that
    the transport element comprises at least one revolving transport belt.
  4. The transport device according to any one of the preceding claims, characterized in that
    the counter position comprises at least one revolving transport belt.
  5. A method for transporting sacks or bags, which are transported by means of at least one transport element extending in the transport direction, which transport element lies on a bottom (120, 120') of the sack (102) or bag, wherein the transport element presses the sack (102) or bag by means of a pressing force against a counter position,
    characterized in that
    the pressing force provided by the transport element is reduced in at least one region of the bottom, wherein the transport element at the points at which the pressing force is reduced, comprises cutouts, recesses or depressions, or
    wherein in the vicinity of the points at which the pressing force is reduced, elongated elevations or nubs arranged in series are provided on the transport element.
  6. An apparatus (401) for producing sacks or bags,
    characterized by
    a transport device (101) according to any one of claims 1 to 4.
EP17720815.4A 2016-05-03 2017-05-03 Transport device and method for transporting sacks or bags, and device for producing sacks or bags Active EP3452277B1 (en)

Applications Claiming Priority (2)

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DE102016207567.5A DE102016207567A1 (en) 2016-05-03 2016-05-03 Transport device and method for transporting sacks or bags, and device for producing sacks or bags
PCT/EP2017/060536 WO2017191190A1 (en) 2016-05-03 2017-05-03 Transport device and method for transporting sacks or bags, and device for producing sacks or bags

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EP3452277B1 true EP3452277B1 (en) 2022-11-16

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Publication number Priority date Publication date Assignee Title
AT524968B1 (en) * 2021-04-29 2022-12-15 Starlinger & Co Gmbh Device and method for producing bags from hose sections

Citations (1)

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Publication number Priority date Publication date Assignee Title
US3326735A (en) * 1964-11-30 1967-06-20 Phillips Petroleum Co Continuous sealing of biaxial oriented film

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Publication number Priority date Publication date Assignee Title
DE1186201B (en) * 1963-02-28 1965-01-28 Windmoeller & Hoelscher Device for welding the open ends of tube sections made of thermoplastic material
DE2527479A1 (en) * 1975-06-20 1976-12-30 Hesser Ag Maschf Sealing appts. with heatable jaw for thermoplastics foil - has antistick band shaped coating in front of sealing jaw
DE20113851U1 (en) * 2001-08-22 2002-01-03 TOSS GMBH & CO. KG, 35418 Buseck Device and metal tape for heat sealing
US6929594B2 (en) * 2002-09-30 2005-08-16 Illinois Tool Works Inc. Belt drive assembly for feeding zipper tape
US7685795B2 (en) * 2005-06-29 2010-03-30 Shanklin Corporation Grip belt drive system
DE102008017446A1 (en) * 2008-04-03 2009-10-15 Windmöller & Hölscher Kg Apparatus and method for producing sacks
ES2424952T3 (en) * 2010-10-14 2013-10-10 Starlinger & Co Gesellschaft M.B.H. Procedure and device for the configuration of open bottoms in final areas of tubular bag bodies

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326735A (en) * 1964-11-30 1967-06-20 Phillips Petroleum Co Continuous sealing of biaxial oriented film

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EP3452277A1 (en) 2019-03-13
WO2017191190A1 (en) 2017-11-09
BR112018072730A2 (en) 2019-02-19

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