DE102022113464A1 - SYSTEM FOR CONVERTING A WEB-SHAPED STARTING MATERIAL INTO PACKAGING BAGS - Google Patents

Abstract

The present invention relates to a system for converting a web-shaped starting material, which defines a longitudinal direction of the web and extends between two longitudinal edges opposite in the web width direction, in particular made of paper or cardboard, into packaging bags, comprising a feed device for pulling off the web-shaped starting material, a forming device for continuously forming the web-shaped starting material into a material web with a V- or U-shaped cross section with a receiving cavity extending in the longitudinal direction of the web, characterized in that the system comprises a guide device for guiding a leading edge of the web-shaped starting material from the feed device to the forming device.

Description

The present invention relates to a system for converting a sheet starting material into packaging bags. A web-shaped starting material defines a longitudinal direction of the web and expands between two opposite longitudinal edges. The web-shaped starting material preferably consists of paper or cardboard.

Packaging bags, a packaging material web and packaging material blanks are out DE 10 2020 114 1 A1 known. Such packaging bags, etc. are used in the packaging industry to pack objects, especially shipping items, in particular to protect them from damage during shipping.

Various systems are known for forming packaging bags from strips of packaging material for holding objects such as shipping items.

US 9,725,194 B2 and EP 2 840 027 B1 describe systems for the automatic packaging of objects on a sliding plane. A web material is deflected from a feed plane into the sliding plane. When deflecting, the packaging web material is pulled along edged wedges so that elongated grooves are created in the packaging web material. Downstream of the wedges, the packaging web material should be folded over to form a packaging material web from which blanks can be removed. The system has a large length in the longitudinal direction of the web and therefore has a large footprint, which is undesirable given the limited space in a shipping center. The creation of grooves using edges has proven to be a frequent cause of web breaks, which is disruptive to the continuous production of packaging material webs and sections thereof. To put the system into operation after a material tear, after the consumption of a material web supply or for the initial commissioning of the system, the leading edge of the web material must be threaded from the material web supply along the various swivel rollers, around corners and through narrow gaps. Threading requires enormous manual effort and is therefore very time-consuming. The system is practically at a standstill during threading, meaning that no items can be packed during this time.

It is an object of the invention to overcome the disadvantages of the prior art, in particular to provide an efficiently usable system for converting a web-shaped starting material, which, while requiring little space, is easy, safe and reliable to handle and for packaging a wide variety of objects, especially those with particularly short ones set-up times is suitable.

Accordingly, a system is provided for converting a web-shaped starting material, wherein the starting material defines a longitudinal direction of the web and extends between two longitudinal edges opposite in the direction of the web width. In particular, the starting material includes, in particular predominantly, d. H. at least 75%, in particular at least 80%, preferably at least 90%, paper or cardboard or consists of it.

Sheet material or sheet material, such as the starting material, has a longitudinal direction of the sheet. The sheet material preferably has a constant sheet/material thickness. Web-shaped material generally expands in the web width direction transversely to the web longitudinal direction and, when viewed transversely to the web direction, in particular has a constant width. In the web width direction, the web-shaped material has opposing longitudinal edges. In the web width direction, the packaging material web or the web-shaped starting material ends at a longitudinal edge or at a longitudinal edge extending in the longitudinal direction of the web. For example, the web-shaped starting material has a width of at least 200 mm and in particular of at most 2000 mm. For example, the width is approximately 500 mm. Web-shaped material generally has much larger dimensions in the web longitudinal direction than in the web width direction, for example the extent of the web material in the web longitudinal direction can be at least 20 times, at least 50 times, at least 100 times, at least 1000 times larger than in the web width direction . Sheet material generally has much larger dimensions in the sheet width direction than in the thickness direction, for example the extent of the sheet material in the sheet width direction may be at least 20 times, at least 50 times, at least 100 times, at least 1000 times larger than the sheet /-Material thickness. Optionally, at least one longitudinal edge strip adjacent to a longitudinal edge is provided at least in sections with a cold-sealable adhesive. The adhesive width of the longitudinal edge strip provided with cold-sealable adhesive can be at least 10 mm and in particular at most 300 mm, 250 mm or at most 200 mm. For example, both opposite longitudinal edges can be provided with cold-sealable adhesive.

The web-shaped material is preferably predominantly or entirely made of cellulose based material. In particular, the web-shaped material can be formed from paper, such as recycled paper, and/or cardboard, in particular corrugated cardboard. A web-shaped material, in particular made of paper or cardboard, in particular corrugated cardboard, is preferably provided. The material web can be made from paper, such as recycled paper, and/or 100% recyclable paper, which can be made without chemical ingredients. Recycled paper is in particular paper materials with a small proportion (less than 50%) of paper material containing fresh fibers. For example, paper materials that contain 70% to 100% recycled paper, especially based on waste paper, are used. The recycled paper in the context of this invention can be paper material which can have a tensile strength index along the machine direction of at most 90 Nm / g, preferably a tensile strength of 15 Nm / g to 60 Nm / g, and a tensile strength index across the machine direction of at most 60 Nm / g can have, preferably a tensile strength of 5 Nm / g to 40 Nm / g. A standard can be used to determine the tensile strength or the tensile strength index DIN EN ISO 1924-2 or DIN EN ISO 1924-3 be used. Additionally or alternatively, a recycled paper property or waste paper property can be characterized by the so-called bursting resistance. A material in this sense is recycled paper with a burst index of at most 3.0 kPa*m^2/g, preferably with a burst index of 0.8 kPa*m^2/g to 2.5 kPa*m^2/g. The standard is used to determine the burst index DIN EN ISO 2758 used. Furthermore, the packaging material has a mass per unit area of in particular 40 g/m2 to a maximum of 140 g/m2. The web-shaped starting material can be in the form of a roll of material web or a zigzag-folded stack of packaging material, which is also referred to as a fanfold stack.

The system according to the invention comprises a feed device for pulling off the web-shaped starting material, in particular from a material web supply, such as a supply roll. The feed device can, for example, comprise opposing conveyor rollers, conveyor rollers or the like. It may be preferred that the feed device has a drive unit, such as an electric motor, which drives at least one conveyor roller or roller. The feed device is preferably designed to pull the web-shaped starting material from a material web supply, for example a zigzag-folded supply stack, which can also be referred to as a fanfold stack, or from a supply roll.

The system according to the invention further comprises a forming device for continuously forming the web-shaped starting material into a material web with a receiving cavity extending in the longitudinal direction of the web. The forming device is preferably designed and set up to transform the, in particular originally flat, web-shaped starting material into a material web with a V- or U-shaped cross section. Preferably, the receiving cavity of the material web has an insertion opening extending in the longitudinal direction of the web. In particular, the receiving cavity is delimited by a pocket base formed opposite the insertion opening and laterally by protruding wings of the material web. The material web can, for example, be formed with a V-shaped cross section. The forming device can, for example, be designed to transform an originally flat web-shaped starting material by at least one wing, which extends along a first (for example right in the direction of conveyance) or second (for example on the left in the direction of conveyance) longitudinal edge towards the other wing is bent or folded. Alternatively, the material web can be formed with a U-shaped cross section. The forming device can be designed to bend or fold opposite wings on both opposite longitudinal edges of the originally flat web-shaped starting material onto one another to form a spine extending along the center of the web material. In the system for converting the web-shaped starting material, the forming device is preferably arranged downstream of the feed device in the conveying direction.

The system according to the invention comprises a guide device for guiding a leading edge of the web-shaped starting material from the feed device to the forming device. The starting material is safely guided from the feed device to the forming device by the guide device. Because the guide device ensures a safe transfer of the leading edge of the web-shaped starting material from the feed device to the forming device, a setup process for putting the system into operation with a new material web can be significantly accelerated, for example after a material web supply has been used up or following an unintentional tearing of the material web in the forming device become. By providing a guide device along which the web-shaped starting material and in particular a leading edge thereof is guided from the feed device to the forming device, the required manual set-up effort can be significantly reduced or even completely avoided.

In the conveying direction, the deflection is behind the intake device at the entrance area Forming device arranged. In particular, the forming device can be coordinated with the web-shaped starting material, the feed device and/or the forming device in such a way that the web-shaped starting material has a flat web-shaped extension on the forming device, in particular along an at least partial loop around the forming device. A flat web-shaped extension of the web-shaped starting material is to be understood in particular in relation to the extension of the starting material in the web width direction. In the conveying direction or the longitudinal direction of the web corresponding to the conveying direction, the flat web-shaped starting material can be guided along a curved course, in particular by deflection, the feed device and, if necessary, a support roller or the like, whereby the curved course can be C-shaped or S-shaped in sections, for example. The deflection is preferably designed to change the course of the web-shaped starting material in the conveying direction, for example by at least 10° and/or not more than 180°.

The deflection can be shaped, for example, as a roller, in particular as an ideally cylindrical roller. Preferably, a deflection designed as a roller can be in one piece and extends along the width of the web-shaped starting material. Alternatively, a deflection formed as a roller can be convex, with the diameter in the respective end region of the roller being smaller than the diameter in the middle. The advantage of this configuration is that the deflection has a positive influence on the forming device downstream of it in the direction of flow as well as on the web-shaped starting material, and that the web-shaped starting material is held centrally in the system relative to the forming device, which means that the system can be designed to be particularly compact can and on the other hand it is essentially possible to dispense with guide means for laterally guiding the web-shaped starting material. Furthermore, the web-shaped starting material can be pre-stretched by a convex design of the deflection, so that the forming process following it is simplified and, if necessary, can be designed to be more reliable, and the conveying speed can be increased. The term convex design preferably refers to a continuously curved design. Alternatively, gradations that come close to a convex silhouette are also conceivable. In a simple manner, there is only a single gradation, with the deflection designed as a roller having the shape of a double truncated cone, and in the middle area of this roller the diameter is largest and in the respective end area of the roller the diameter is smaller. Convex designs of such a deflection designed as a roller have proven to be very effective, with the different peripheral speeds having no noticeable influence on the resulting friction between the web-shaped starting material and the roller.

It is conceivable that the deflection is composed of several roller and/or roller sections arranged next to one another, optionally distributed, in the transverse direction across the width of the web-shaped starting material. This plurality of roller and/or roller sections have a common pivot point along a straight central longitudinal axis. In this case, an aforementioned convex design of a deflection with a deflection roller or roller made up of several sections can be realized, in particular by at least individual roller and / or individual roller sections having different outer diameters, preferably the overall view of all the rollers put together to form a deflection roller or roller - and/or roller sections represent a convex structure in the manner of a convex enveloping silhouette.

It may be preferred that the deflection interacts with a dancer, which is located upstream of the deflection in the conveying direction. In principle, such a dancer can be trained as a role. The dancer can implement a tensioning device through which the web-shaped starting material is always kept under tension between the feed device and the forming device. The clamping force can be preset and ensures a reliable forming and removal process, as will be explained in more detail later.

The deflection preferably comprises a partially cylindrical or cylindrical, in particular rotating, means which determines the conveying path of the web-shaped starting material, which is preferably realized by a, in particular a single, deflection roller. Due to the deflection, the system for converting a web-shaped starting material into packaging bags can be implemented in a particularly space-saving manner. In addition, by providing a deflection, the risk of the web-shaped starting material being torn off in the advance of the forming device can be significantly reduced.

In a preferred embodiment of the system, the guide device defines a channel, in particular a funnel-shaped one. The channel is formed by several guide elements which can be brought into contact with the leading edge of the starting material, in particular a sliding contact or a driving contact. The guide elements define a limited path for the railway mige starting material from the feed device to the forming device. The predetermined path of the web-shaped starting material is limited by the contact between the leading edge of the web-shaped starting material and at least one guide element. As a result, the web-shaped starting material is safely guided from the feed device to the forming device.

According to an optional development of the system, the channel tapers in the conveying direction of the web-shaped starting material, preferably the channel height tapers in the vertical direction. The tapering channel can have a greater width, in particular channel height, at the exit area of the feed device than at the entrance area of the forming device. In this way, the web-shaped starting material can be transferred unhindered from the feed device to the guide device and fed from the guide device to the forming device with a minimized risk of paper jams.

Preferably, the guide device comprises at least a first guide element, which delimits a first, in particular lower in the vertical direction, side of the channel, and / or at least one second guide element, which is opposite the first side, in particular upper in the vertical direction, side of the channel limited. The channel can be open on one or more sides, especially in the width direction.

In a preferred embodiment of the system, the guide device comprises a plurality of guide elements which are arranged next to one another and/or one behind the other with respect to the conveying direction. For example, the guide device can comprise a plurality of guide elements arranged one behind the other in the conveying direction, such as guide plates and/or guide rods, which together realize the distance bridged by the guide device. For example, the guide device can have different, in particular different types, guide elements arranged one behind the other in the conveying direction, for example a rigid guide element and a conveyor-movable guide element arranged behind it in the conveying direction. Additionally or alternatively, the guide device can have a plurality of guide elements arranged next to one another transversely to the conveying direction, in particular in the width direction. Guide elements arranged next to one another can, for example, be guide rods arranged next to one another like a rail or grid, which together span a surface on which the web-shaped starting material and its leading edge can slide.

Preferably, in one embodiment of a system it can be provided that the guide device bridges a distance between the feed device and the forming device. Preferably, at least one, in particular first, guide element extends completely from the feed device to the forming device. The first guide element can extend uninterrupted from the exit area of the feed device to the entrance area of the forming device. Alternatively or additionally, it can be provided that at least one, in particular second, guide element extends over at least half, in particular two thirds, preferably three quarters, particularly preferably nine tenths, of the distance. The guide device can comprise several guide elements of the same or different lengths.

In a preferred embodiment of the system, the guide device bridges a height difference between an exit area of the feed device and the entrance area of the forming device, which is arranged in the vertical direction above the exit area. Such a guide device guides the web-shaped starting material along a vertically rising path from the feed device to the forming device. By arranging the forming device vertically offset from the feed device, a particularly space-saving system can be implemented.

According to one embodiment of the system, the guide device comprises at least one rigid guide element, such as a guide rod, a guide plate or the like. In particular, the guide device comprises several rigid guide elements. With rigid guide elements, a contact contact with the leading edge of the web-shaped starting material can be realized as a sliding contact.

Alternatively or additionally, the guide device comprises at least one movable guide element, such as a belt, for driving the leading edge of the web-shaped starting material. In the case of movable guide elements, a contact contact with the leading edge of the web-shaped starting material can be realized as a driving contact and, if necessary, as a sliding contact. It may be preferred that the conveyor-movable guide element is at least partially engaged with the forming device, in particular in an input region of the forming device. For example, the movable guide element can be implemented as a belt for driving contact with the leading edge of the web-shaped starting material, this belt being in partial contact with a deflection, such as a deflection roller, at the entrance to the forming device in order to ensure a reliable transfer of the web-shaped starting material to ensure the forming device.

Preferably, the movable guide element is at least partially engaged with the forming device, in particular in an entrance area of the forming device. The forming device preferably comprises a deflection, such as a deflection roller, which specifies at least one turn of the web-shaped starting material in an entrance area of the forming device. Preferably, the deflection, in particular the deflection roller, has a circumferential contact area of at least 10°, in particular at least 45°, preferably at least 60°, particularly preferably at least 90°, which can be brought into contact with the web-shaped starting material. In particular, the movable guide element, such as a belt, can be brought into contact with the web-shaped starting material on the radial outside with respect to a deflection axis defined by the deflection, the retaining strap being in contact with the web-shaped starting material at least in a part, in particular in at least a large part, of the peripheral contact area can be created.

In particular, the retaining strap extends in the web width direction over less than half, in particular less than a third, preferably less than 15% of the axial length of the deflection and/or an initial width of the web-shaped starting material. The retaining belt is preferably guided by at least two, in particular three, belt rollers, with the retaining strap resting on the deflection, in particular the deflection roller, between a first and a second belt roller. It may be expedient for the tether to be conveyed with a tether drive, in particular with a belt speed corresponding to the peripheral speed of the deflection roller. Overall, the belt speed when operated by the tether drive can be dimensioned such that it corresponds to or exceeds the take-off speed. In the latter embodiment, the belt speed can be ahead of the speed of the leading edge of the web-shaped starting material, so that the belt can always be in a driving contact with the leading edge or can even have a somewhat pulling effect on the leading edge. The range of a leading speed can range from 1% to 20% over the speed of the leading edge. Optionally, the retaining strap can be designed to be free-running. For this purpose, at least one of the belt rollers can be equipped with a freewheel. However, the belt roller connected to the drive motor is primarily equipped with the freewheel. In particular, in the case of a belt deflection roller, its rotatable bearing and its freewheel are aligned coaxially with one another. The free-running retaining strap has proven to be very helpful as an installation aid, particularly when reinstalling the web-shaped starting material into the system, because it can be used to hold the web-shaped starting material against running back. The use of a retaining strap has proven to be particularly useful in combination with large peripheral contact areas.

In particular, the forming device comprises at least one folding means, such as a folding roller, which can be or is brought into contact with the material web, such as a rolling contact, a sliding contact or the like. The folding means can in particular be designed and set up to press against the material web. The folding means can be arranged relative to at least one other means determining the conveying path of the web-shaped starting material or the material web, in particular at least one upstream, downstream, in relation to the conveying direction to the right or left relative to the folding means, that the folding means together with the at least one other means causes a deformation of an originally flat web-shaped extension. In particular, the at least one other means determining the conveying path of the web-shaped starting material or the material web can also be brought into contact with the starting material or the material web.

Preferably, the forming device preferably comprises at least one folding means, such as a folding roller. The forming device comprises at least one folding means, such as a folding roller, which pushes against the material web transversely to the longitudinal direction of the web between the opposite longitudinal edges in order to introduce two wings protruding from a pocket base into the web-shaped starting material. Preferably, the folding means pushes against the material web in the web width direction, particularly centrally between the opposite longitudinal edges.

According to a preferred development, the deflection is arranged in relation to a vertical direction in an upper entrance area, in particular at an upper end, of the forming device, wherein in particular the web-shaped starting material is guided in the forming device with a conveying direction which is directed downwards in relation to a vertical direction .

In a particularly preferred embodiment of a system, the feed device is designed and set up to push the leading edge of the web-shaped starting material through the guide device from the feed device to the forming device. In particular, the feed device is designed to move the leading Push the edge of the web-shaped starting material from the feed device upwards in the vertical direction through the guide device to the forming device. Preferably, the pushing feed device is intended for use with, in particular combined with, a web-shaped starting material comprising or consisting of paper or cardboard, in particular corrugated cardboard. The pushing feed device is preferably designed and set up to convey the web-shaped starting material over a distance of at least 20 cm, in particular at least 50 cm, through the guide device. Surprisingly, it has been shown that, contrary to expectations and common prejudices, web-shaped starting material can be pushed to a forming device using a guide device. By pushing the web material through the guide device to the forming device using a motor-driven feed device, laborious manual threading can be dispensed with. With the help of this device, the web-shaped starting material can even be conveyed along larger distances within the system, as well as along arcuate or S-shaped paths, whereby, depending on the design of the system, typical route lengths can be up to 150 cm.

According to one embodiment of a system, the feed device can comprise at least one driven feed roller and at least one feed roller cooperating with it, in particular driven or driven. The feed device has an operating position in which the driven feed roller and the cooperating feed roller are brought closer together for gripping the web-shaped starting material, in particular a pretensioning force pushing the driven feed roller and the feed roller cooperating therewith against one another, and wherein the feed device has a setup position in which the driven feed roller and the cooperating feed roller are arranged at a distance from one another.

According to a further development of the system, the feed device has an operating state in which the feed device is designed to apply a first, in particular fast and/or variable, take-off speed to the web-shaped starting material, and a setup state in which the feed device (110) is designed for this purpose is to apply a second, in particular slow and/or constant, take-off speed to the web-shaped starting material. The average, in particular constant, take-off speed in the operating state is significantly higher than the average take-off speed in the setup state, preferably at least twice as high, particularly preferably at least 5 or 10 times as high.

In particular, it can be provided that the system comprises a material web supply, in particular a supply roll, of the web-shaped starting material, from which the feed device draws in the web-shaped starting material, the feed device and the material web supply being coordinated with one another in such a way that the feed device of the guide device takes the web-shaped starting material with it a curvature directed upwards in the vertical direction, in particular a supply roll curvature, and/or an adhesive coating oriented upwards in the vertical direction.

According to one embodiment of the invention, a system is provided for converting a web-shaped starting material into packaging bags, which comprises a feed device and a forming device. It is provided that the deflection is arranged in relation to a vertical direction at an upper entrance region of the forming device and/or that the deflection specifies at least one turn of the web-shaped starting material between the feed device and the forming device. Preferably, the forming device, together with its upstream deflection and/or together with a feed device provided downstream of the forming device, defines a conveying path for the material web, along which the material web moves downstream in accordance with operation. The vertical direction may be determined as the direction which extends orthogonally relative to a contact surface, such as a hall floor, on which the system is to be arranged or arranged. The vertical direction preferably corresponds to the direction in which gravity acts. It may be preferred that the conveying direction at the exit of the forming corresponds to the conveying direction at the entrance and/or through the forming device. A turn can be described by a U-shaped conveying path of the web-shaped starting material, whereby the U can be oriented upright or upside down, for example. An S-shaped conveying path of the web-shaped starting material comprises two turns, whereby the web-shaped starting material can be guided according to a lying or a standing S. It is conceivable that the web-shaped starting material is guided along a W- or M-shaped conveyor path with three turns. By means of one or more turns, tensions can be provided in the system for guiding the web-shaped starting material and for preparing a pocket-shaped forming. In an embodiment of the deflection and the forming device, each with at least one partially cylindrical or cylindrical, in particular rotating, means determining the conveying path of the web-shaped starting material or the material web, it may be preferred that the cylinder and/or rotation axes of these means are aligned in space parallel to one another. By arranging a deflection, the system for converting a web-shaped starting material into packaging bags can be implemented in a particularly space-saving manner. In addition, by providing a deflection, the risk of the web-shaped starting material being torn off can be significantly reduced.

According to a preferred embodiment of the system, the deflection is arranged in relation to a vertical direction above the feed device and/or possibly above a material web supply. It may be preferred that the conveying direction at the entrance to the forming corresponds to the conveying direction at the exit and/or through the forming device. In an embodiment of the deflection and the feed device each with at least one partially cylindrical or cylindrical, in particular rotating, means determining the conveying path of the web-shaped starting material, it may be preferred that the cylinder and/or rotation axes of these means are aligned in space parallel to one another. By arranging the deflection above the feed device, further space-saving potential can be realized. By using an upper deflection, instead of a material web supply arranged at the top in the prior art, the handling of the system, both in terms of maintenance and loading with new starting material, is much easier than with conventional systems. Advantageously, the material supply and the feed device can be arranged directly one above the other in the vertical direction, or they can be arranged slightly offset from one another and essentially one above the other in the vertical direction. So that the handling of the material supply can be accomplished as easily as possible, particularly when replacing and refilling, the feed device is preferably arranged above the material supply. The material supply and the feed device are also arranged adjacent to the forming device, in particular directly next to one another, so that an extremely compact design of the system for converting a web-shaped starting material into packaging bags can be realized. By arranging the deflection above the feed device and/or the forming device, a particularly compact design can be achieved. In this way, the deflection can result in a particularly compact design of the system. Furthermore, the deflection can preferably be designed as a roller. The web-shaped starting material runs over the deflection, in particular the deflection roller. If the deflection is designed as, in particular, an ideal cylindrical roller, the material web leaves the deflection in a flat shape in accordance with the contour of the deflection and makes the web-shaped starting material available to the forming device for further processing in the downstream forming device.

According to one embodiment of the system, the web-shaped starting material is guided in the forming device with a conveying direction that is directed downwards in relation to a vertical direction. It may be preferred that the forming device, possibly together with the deflection provided upstream of the forming device and/or together with a feed device provided downstream of the forming device, defines a conveying path for the material web, which in the course of the conveying path through the forming device and/or at the exit of the Forming device is oriented downwards in the vertical direction. Preferably, the web-shaped starting material extends with its web width direction at the deflection, in particular flatly, along a contact line or contact surface of the deflection with the web-shaped starting material. While it is common practice in the prior art to align the conveying direction of the material web in forming devices horizontally and to feed the sheet-shaped starting material to the forming device in a horizontal direction, further space savings can be achieved through the design according to the invention.

Optionally, the forming device comprises at least two folding means arranged one behind the other in the conveying direction. The folding means can be implemented, for example, by slide rail sections, rigid sliding disks, thorns, folding rollers or the like. The folding means preferably implement means of the forming device that determine the conveying path of the material web. The forming device and/or a loading device define a guide surface for the pocket base. Preferably, the guide surface is designed to guide and/or support the V- or U-shaped material web in the area of the pocket base and/or between opposite wings of the material web. It may be preferred that the guide surface implements, at least in sections, a means determining the conveying path of the web-shaped starting material or the material web, which can be or is brought into contact with the starting material or the material web. The guide surface can be designed in particular as a stop for objects inserted or usable in a loading device, such as shipping items. A deflection axis defined by the deflection, in particular the deflection roller, is transverse, in particular aligned perpendicular to the conveying direction along the guide surface and / or arranged offset from the guide surface.

According to one embodiment of the invention it is provided that at least a first folding means, such as a first folding roller, is arranged between the guide surface and the deflection axis. Preferably, the second folding means, for example the outer circumference of a second folding roller, corresponds to the position of the guide surface. Particularly preferably, it can be provided that a vertical distance with respect to the guide surface between the first folding means and the guide surface is at least one eighth, in particular at least a quarter, preferably at least a third and/or not more than three quarters, in particular not more than two thirds , preferably not more than half, which measures a distance between the deflection axis and the guide surface that is orthogonal with respect to the guide surface. It should be clear that the second folding means is arranged further away from the deflection in the conveying direction than the first folding means. In an embodiment of a forming device with several folding rollers or the like, it may be preferred that the cylinder and/or rotation axes of these folding means are aligned in space parallel to one another. Additionally or alternatively, it can be provided that the cylinder and/or rotation axes of the folding means, in particular folding rollers, are aligned in space parallel to the deflection axis. It has surprisingly been shown that thanks to the use of several folding means in the forming device, a reliable, reproducible, rapid forming of a web-shaped starting material web into a formed material web with a V- or U-shaped cross section along a particularly short extent in the longitudinal direction of the web corresponding to the conveying direction can be achieved with a low risk of demolition.

According to one embodiment of the system, the guide surface can be defined by at least one counter bearing, in particular at least one counter bearing roller or a sliding surface, corresponding to at least one folding means, such as folding rollers, in particular the second folding roller. With the aid of at least one counter-bearing roller, in particular several counter-bearing rollers, and/or at least one sliding surface, in particular several sliding surfaces, in which case in particular counter-bearing rollers and sliding surfaces can be provided alternately in the conveying direction, a reliable counter-bearing can be provided on the guide surface for supporting the base of the pocket and, if necessary, in the receiving cavity or used items, such as shipping items. In the case of a counter bearing that has counter bearing rollers and sliding surfaces, it can be provided that when the counter bearing rollers and sliding surfaces are arranged one behind the other in the conveying direction, the at least one counter bearing roller is slightly raised relative to the at least one adjacent sliding surface, in particular the one on the counter bearing roller, in particular several immediately adjacent ones Counter bearing rollers, tangentially adjacent plane is at a distance from the sliding surface. The distance can be dimensioned in such a way that, during conveyance, the base of the pocket rests against the counter-bearing roller or rolls and is conveyed with little friction, with at least one additional sliding surface being available for support depending on the loading condition. The distance mentioned is in a range from 1mm to 3mm and is typically 1.5mm.

In a further embodiment of the system of the invention, a third folding means, in particular a third folding roller, is arranged between the guide surface and the first folding means, such as the first folding roller. Optionally, a third and optionally further folding means can be arranged in the conveying direction and/or in the direction orthogonal to the guide surface between the first and the second folding means.

According to an embodiment of the system according to the invention, the forming device comprises at least one folding roller, preferably two or three folding rollers. The at least one folding roller, in particular the two folding rollers or the three folding rollers, comprise (each) two roller disks spaced apart in the roller axial direction. A spacer can be provided between the rolling disks. The V or U shape of the formed material web can be predetermined by the distance between the roller disks of the at least one folding roller in the roller axial direction. In particular, a transverse width of the pocket base can be determined by the distance between the roller disks of a folding roller in the roller axial direction.

The folding rollers are preferably designed to be interchangeable and/or adjustable. It is therefore possible to adapt the system simply and quickly to a different material or to a different material of the web-shaped starting material. It is also possible to easily and quickly adapt to a desired V or U shape of the material web to be formed. A material web formed with a V-shaped cross section has one, preferably exactly one, groove introduced by one, in particular exactly one, folding roller, along which the one disc-shaped rolling disk preferably runs. Regardless of the number of grooves, it can be advantageous if rolling disks are used, which run along the groove and mechanically process the groove during the forming process in such a way that the forming process is made easier is simplified and requires less effort

According to a further development of the system, an axis distance between the deflection axis and the roller axis of the first folding roller, preferably in the direction parallel to the guide surface, is at least 10 mm, in particular at least 120 mm, and/or not more than 300 mm, in particular not more than 220 mm , preferably about 168 mm. The deflection means can optionally have a smaller outside diameter than the first folding roller. It has been shown that with such an axial distance along a short distance in the conveying direction, a significant transformation of a web-shaped starting material into a material web with a V- or U-shaped cross section can be achieved.

In one embodiment of the system, an envelope distance between a material web contact area of the first folding means facing the guide surface, in particular the first folding roller, preferably its outer circumference, and a deflector contact area of the deflection means, in particular the deflection roller, facing away from the guide surface, measures at least 10 mm, in particular at least 40 mm, and/or not more than 300 mm, in particular not more than 80 mm, preferably about 70 mm. It may be preferred that the envelope distance is determined in the direction perpendicular to the guide surface.

In one embodiment of the system, a forming length from the deflection, in particular the deflection roller, to the second folding means, in particular the roller axis of the second folding roller, preferably up to a loading opening, is not greater than 120 cm. In particular, the forming length is not greater than 100 cm, preferably not greater than 80 cm. Alternatively or additionally, it is provided that the forming length is not greater than twice the initial width of the web-shaped starting material web, in particular not greater than 1.5 times the initial width.

According to one embodiment of the system for forming a web-shaped starting material into packaging bags, the forming device comprises at least a few guide means, such as guide rods, which are opposite in the web width direction, for guiding the web-shaped starting material along a path that tapers in the conveying direction. The pair of guide means can, for example, be designed to reshape an originally flat web-shaped starting material by at least one wing, which extends along a first (for example right in the direction of conveyance) or second (for example on the left in the direction of conveyance) longitudinal edge onto the other wing too bent or folded. The pair of guide means can be arranged as a means determining the conveying path of the web-shaped starting material or the material web, on the right or left with respect to the conveying direction, and optionally upstream and/or downstream relative to the folding means. Preferably, the folding means, together with the pair of guide means, causes a deformation of an originally flat web-shaped extension. Other guide means can have a plurality of individual rollers, which reduces friction in the conveying direction.

According to one embodiment of the invention, a system is provided for converting a web-shaped starting material into packaging bags, which comprises a feed device and a forming device. A deflection, for example a deflection roller, is preferably designed and set up to introduce the web-shaped starting material into the forming device. The system optionally has a clamping device, such as a support roller. The clamping device defines a clamping center axis that is aligned in the web width direction. The tensioning means can be brought into contact with the web-shaped starting material or is in contact with the web-shaped starting material in order to urge the web-shaped starting material to an evasive movement transversely to the conveying direction and transversely to the web width direction, in particular under the action of force, in particular the web-shaped starting material with a predetermined tension or Clamping force is applied so that it is always tensioned between the feed device and the conveyor device and does not sag. The clamping means is arranged in or on the feed device in the conveying direction, preferably at the exit area of the feed device. In particular, the clamping means is arranged on or in the guide device. Preferably, the clamping means is designed to carry out a compensating movement in the vertical direction upwards and/or downwards.

According to a preferred embodiment of the invention, the clamping means is prestressed. The pretension forces the clamping device to make a compensating movement. Preferably, the pretensioning force is directed against a force acting on the tensioning means through the web-shaped starting material. In particular, the tensioning means is pretensioned by a mechanical spring. Alternatively or additionally, the clamping means has a clamping mass. The clamping mass can force the clamping device vertically downwards in the direction of gravity. The clamping means is preferably free of compressed air. By avoiding a compressed air actuator, for example a pneumatic piston, the energy and/or space requirements of the system can be minimized.

In one embodiment of the invention, the clamping means is movably mounted on the retraction device. The clamping device is generally mounted so that it can move transversely to the conveying direction. In particular, the clamping means can be mounted movably in the vertical direction. Preferably, the clamping means is movably mounted transversely to the conveying direction with a vertical movement component, for example along an incline or an arc. The retraction device can, for example, have a linear guide in which the clamping means is held. Alternatively, the retraction device can have a pivotable bearing or a pair of pivotable bearings, which pivotably hold the clamping means on the retraction device. Alternatively, the clamping device is pivotally mounted on the frame of the system.

A further embodiment of the invention provides that the clamping means comprises at least one position sensor, such as a contactor. The feed device is preferably designed and set up to apply a feed speed to the web-shaped starting material depending on the position sensor, the feed device switching a drive active or inactive depending on a threshold value detection, such as a detection of an initial position. When the drive is in an active state, it drives the feed device to pull in the web-shaped starting material from the material web supply. When the drive is inactive, it does not actuate the retraction device. In this way it can be ensured that sufficient starting material is always provided for continuous and rapid operation of the system. At the same time, material jams and material breaks are avoided. As an alternative to the two-point control method mentioned, other control methods are also conceivable. For example, in addition to the (first) active and inactive states, a three-point controller can also switch a (second active) operating state of the drive with a conveying speed that is faster or slower than the conveying speed of the (first) active state. Alternatively or additionally, the controller can be designed as a continuous controller, for example connected to a displacement sensor or angle sensor for continuously detecting an actual position of the clamping means.

Alternatively or additionally, an embodiment of the system includes a force measuring sensor, in particular for measuring an absolute force acting on it. One component of the detected force relates to the tension force of the web-shaped starting material that is under pretension. The force measuring sensor can be arranged on a bearing and/or holder of the deflection and/or the retraction device or at another suitable location in the system. The force measuring sensor as well as the drive and/or the retraction device are part of a drive control circuit. The drive control circuit is preferably designed and set up to always keep the pretension of the web-shaped starting material at a predefined level, in particular independently of the operation of the conveyor device. The drive control circuit is preferably designed and set up to set a smooth start-up of the drive of the conveyor device when a conveying movement starts. In particular, the drive control circuit is designed and set up to gradually increase the conveying speed for the web material. Alternatively or additionally, the drive control circuit is designed and set up to gently and gradually reduce the conveying speed to a standstill during a switch-off process. Such a design of the system with a drive control circuit can be designed without a clamping device.

According to an optional embodiment of the invention, the feed device comprises at least one groove element for introducing at least one longitudinal groove, in particular at least one longitudinal central groove, preferably two or three longitudinal central grooves, into the web-shaped starting material. Preferably, the at least one creasing element is matched to a folding means, in particular at least one, preferably first, folding roller. The system can expediently be equipped with at least one groove element, which is designed to introduce a groove or several grooves in the longitudinal direction of the web into the web-shaped starting material, preferably paper or cardboard, or consisting of it, in order to carry out the forming process of the web-shaped starting material along the longitudinal grooves to improve the folding materials. Preferably, the at least one longitudinal groove is introduced accordingly DE 10 2020 114 1 A1 .

Alternatively or additionally, the at least one creasing element comprises a, preferably Teflon-coated, standing knife or at least one rotatably mounted creasing disk. With such a creasing element, grooves can be reliably introduced into the web-shaped starting material with a low risk of tearing.

Further alternatively or additionally, the at least one groove element is spring-loaded and/or mounted without compressed air. By pre-tensioning the groove element, preferably pre-tensioning by means of at least one mechanical spring and/or without a pneumatic actuator, the required forming force can be optimally adjusted in order to ensure a quick and reliable forming effect by the system.

According to one embodiment of a spring-loaded and/or compressed air-free grooved element, this presses at least one grooved element against a grooved counter bearing, such as a counter bearing roller. The grooved counter bearing is preferably implemented separately from a driven and/or driven feed roller of the feed device.

An embodiment of the system for converting a web-shaped starting material into packaging bags further comprises a conveying device for conveying the web-shaped starting material formed in the forming device, the conveying device comprising a pair of cooperating conveyor rollers for gripping at least one longitudinal edge of the material web with a V- or U-shaped cross section. It may be preferred that the conveyor rollers cooperating in pairs have an ideally cylindrical and/or smooth outer peripheral surface.

In a further development of the system with a conveyor device, it is provided that the conveyor rollers comprise a first conveyor roller which has at least one convex circumferential embossing projection and a second conveyor roller with at least one embossing recess which is complementary to the embossing projection.

According to an alternative or additional development of the system with a conveyor device, the conveyor rollers implement longitudinal sealing. The conveyor rollers are designed and set up to press two opposing wings of the material web with a V- or U-shaped cross section against each other with a sealing pressure of at least 0.5 bar, in particular at least one bar, preferably at least 1.5 bar, in order to form the packaging bag to form limiting longitudinal strips. The level of sealing pressure can be adjusted to the adhesive used. A sealing pressure of 1 bar corresponds to a joining force of 10 Newtons per square centimeter acting on the packaging bag.

The conveyor rollers are optionally designed to be friction-locked on the outer surface in order to be able to convey the material web reliably. For this purpose, the outer surface of the jacket can be profiled. A profiling can be designed in the manner of a corrugation or a knurl. Alternatively, the outer jacket surface can be smooth and/or designed as a rubber coating. The conveyor rollers themselves preferably rotate in opposite directions in pairs, with the two opposite wings of the material web being guided between them and the sealing taking place. Furthermore, the conveyor rollers pull the web-shaped starting material through the upstream forming device, with the drive of the conveyor rollers optionally driving the forming process in functional union. It can be provided that during and/or as a result of the conveying of the web-shaped starting material through the rollers of the conveying device, the feed device is activated in response, in particular in such a way that material is fed in from the material supply and/or that the tension of the web-shaped starting material is always guaranteed .

It may be preferred that the conveyor rollers are provided with only one drive. Both conveyor rollers can be coupled to one another in terms of drive technology via a gearbox. Alternatively, only one of the two conveyor rollers is driven, while the other runs loosely as a support and joining roller. In a further variant, the driven conveyor roller can be designed as a frictional conveyor roller, in particular having the profiling and/or rubber coating on its outer surface.

Another embodiment of the system for converting a web-shaped starting material into packaging bags, which can be combined with the previous one, further comprises a loading device. The loading device has a loading opening through which shipping items or shipping goods can be inserted into the receiving cavity of the formed material web.

According to a further development of a system with a loading device, it is provided that the loading device comprises two guides for opposite wings, in particular longitudinal edges, of the material web with a V- or U-shaped cross section, which are adjacent to the loading opening and are opposite transversely to the conveying direction. The guides can be implemented, for example, by guide surfaces, guide rollers and/or guide rollers. The guides are arranged upstream in the conveying direction and/or in the area of the loading opening, in particular at the level of the loading opening.

According to another embodiment, the system for converting a web-shaped starting material into packaging bags further comprises at least one sealing device for sealing at least one transverse strip and/or a longitudinal strip of the converted web-shaped starting material and/or a separating device for separating a packaging bag from the starting material web along a transverse strip.

Preferred embodiments are given in the subclaims.

• 1a eine Seitenansicht einer ersten Ausführung eines Systems zum Umformen eines bahnförmigen Ausgangsmaterials in Versandtaschen;
• 1b eine Seitenansicht einer zweiten Ausführung eines Systems zum Umformen eines bahnförmigen Ausgangsmaterials in Versandtaschen;
• 2 eine perspektivische Ansicht einer zweiten Ausführung eines Systems zum Umformen eines bahnförmigen Ausgangsmaterials in Versandtaschen;
• 3 eine Detailansicht einer Ausführung einer Leiteinrichtung;
• 3a ein System zum Umformen eines bahnförmigen Ausgangsmaterials mit einer anderen Ausführung einer Leiteinrichtung;
• 3b ein System zum Umformen eines bahnförmigen Ausgangsmaterials mit einer weiteren Ausführung einer Leiteinrichtung;
• 3c ein System zum Umformen eines bahnförmigen Ausgangsmaterials mit einer weiteren Leiteinrichtungsvariante;
• 4 eine Seitenansicht einer Einzugsvorrichtung mit Rillelementen; und
• 5 eine schematische Darstellung einer Trenn- und Versiegelungsvorrichtung.

Further properties, features and advantages of the invention will become clear below by describing preferred embodiments of the invention with reference to the accompanying exemplary drawings, in which:

• 1a a side view of a first embodiment of a system for forming a web-shaped starting material into shipping bags;
• 1b a side view of a second embodiment of a system for forming a web-shaped starting material into shipping bags;
• 2 a perspective view of a second embodiment of a system for forming a web-shaped starting material into shipping bags;
• 3 a detailed view of an embodiment of a guide device;
• 3a a system for forming a web-shaped starting material with another embodiment of a guide device;
• 3b a system for forming a web-shaped starting material with a further embodiment of a guide device;
• 3c a system for forming a web-shaped starting material with a further guide device variant;
• 4 a side view of a feed device with creasing elements; and
• 5 a schematic representation of a separating and sealing device.

To simplify readability, in the following description of preferred embodiments of the various individually realizable or combinable aspects of the invention, the same or similar reference numerals are used for the same or similar components of different embodiments of systems for converting a web-shaped starting material into packaging bags. The person skilled in the art understands that, although the embodiments of a system described below as examples sometimes embody several aspects of the invention that can be combined with one another, the various aspects can each be implemented individually or in any combination with one another.

A system according to the invention for converting a web-shaped starting material that defines a longitudinal direction of the web and extends between two longitudinal edges opposite in the direction of the web width, in particular a web-shaped starting material made of paper or cardboard, into packaging bags is generally provided with the reference numeral 100.

The web-shaped starting material 1 is preferably made of cardboard or paper or consists of it. In addition to cardboard or paper, the starting material 1 can include an adhesive or the like for sealing the packaging bags 11 to be formed.

Like in the 1a and 1b or 2 shown, the web-shaped starting material 1 can be provided for the system 100 as a material web supply 2, for example in the form of a supply roll. The material web supply 2 is preferably arranged near the ground, so that even heavy, large material web supplies 2 can be used for lifting without cranes or similar aids. Instead, for example, a mobile support frame 20 can be used for a material web supply 2, such as in 2 to see. The support frame 20 itself can be mechanically coupled to the system 100, for example plugged in, in order to set up an optimized alignment of the web-shaped starting material 1 relative to the feed device 110. The web-shaped starting material 1 rolled up to form the material web supply 2 has a web width direction B. The extension of the starting material 1 in the web width direction B or width of the web-shaped starting material corresponds to the cylinder height of the roll-shaped material web supply 2. The opposite, circular base surfaces of the roll-shaped or cylindrical material web supply 2 are through the opposite longitudinal edges 6 of the starting material web 1 are formed. To form the roll-shaped material web supply 2, the starting material web 1 is wound in the direction of its longitudinal direction L.

The system 100 and possibly the support frame 20 stand on a surface, such as a hall floor, which extends essentially horizontally. A vertical direction V extends orthogonally on this surface and/or in the direction of gravity.

To process the web-shaped starting material 1 into a plurality of packaging bags 11 through the system 100, the starting material web 1 is guided with its longitudinal direction L in accordance with a conveying direction F through the system 100, and is pulled through it and thereby unwound from the roll-shaped material web supply 2. Within the various components of the system 100, the local conveying direction F along which the web-shaped material 1 is moved can be variable with respect to the vertical direction V as well as with respect to a horizontal direction.

The conveying path of the starting material web 1 through the system 100 according to the in 1a and 1b or 2 The embodiments shown as examples generally run (in successive order according to the following list of system components) from a material web supply 2 through a feed device 110, along a clamping device, such as a support roller 115, to a deflection, such as a deflection roller 120, and then through a forming device 130 and to a subsequent loading device 150 and further to a conveying device 170 and a sealing device 180 and finally a separating device 190. From the feed device 110 to the forming device 130, the web-shaped starting material is guided within a channel 201 of a guide device 200.

A web-shaped starting material 1 with sufficient rigidity is pushed from the feed device 110 through the guide device 200 to the forming device 130. For example, after replacing a used material web supply with a fresh material web supply 2, the free leading edge of the web-shaped starting material can be pushed through the channel 201 to the entrance 139 of the forming device 130 by the conveying movement of the feed device 110. It may be expedient to use the web-shaped starting material 1, as in 1a and 1b shown, to be removed from the supply roll in such a way that the leading edge of the starting material realizes a curvature in the vertical direction upwards corresponding to the supply roll curvature, so that tilting of the leading edge with the lower guide element 210 is avoided. If the leading edge of the web-shaped starting material 1 in the guide device 200 has a slight upward curvature, this supports sliding of the starting material web 1 on the inside of the channel 203 in the form of the first, lower guide element 210. The upper inside of the channel 205 in the form of the upper guide element 220 prevents the starting material from rolling up in accordance with its supply roll curvature or otherwise moving away from the intended conveying direction F from the exit area 119 of the feed device 110 to the entrance area 139 of the forming device 130.

If the web-shaped starting material 1 is equipped with an adhesive, such as an adhesive or the like for sealing the packaging bags 11 to be formed, it may be expedient to pull the web-shaped starting material 1 from the supply roll 2 in such a way that the side of the starting material coated with adhesive 1 is oriented upwards in the vertical direction V, so that the adhesive in the channel 201 is prevented from coming into large-scale contact with the lower inside of the channel 203 due to gravity.

In the embodiments shown here as examples, the web-shaped starting material 1 extends essentially flatly in the web width direction B from the material web supply 2 to the deflection roller 120, in particular in a horizontal direction. The starting material web undergoes a turn at the deflection roller 120. Starting from the deflection at the entrance area 139 of the forming device 130, the web-shaped starting material 1 is formed in the forming device 130 into a material web with a V- or U-shaped cross section and a receiving cavity 9 extending in the longitudinal direction L of the web. The receiving cavity 9 is delimited on the one hand by a pocket base 7 and on both sides thereof by wings 8 protruding transversely to the conveying direction F and/or the longitudinal direction L of the web and expands in the longitudinal direction L of the web. The material web 5 with a V- or U-shaped cross section is transferred from the forming device 130 to the loading device 150. The loading device 150 has a loading opening 151 opposite the pocket base 7, through which shipping items can be inserted into the receiving cavity 9. By means of the conveying device 170, the material web 5, which is covered with at least one shipping item and has a V or U-shaped cross-section, is pulled further out of the loading device 150 in the conveying direction F. A sealing device 180 introduces transverse strips 15 and longitudinal strips 16 into the V- or U-shaped material web 5 in order to form packaging bags 11. The transverse strip 15 on the one hand and the longitudinal strip 16 on the other hand can be introduced by different components and/or mechanisms of the sealing device 180. The separating device 190 separates packaging bags 11 occupied by at least one shipping item from the material web 1. The sealing device 180 can be formed at least partially in functional union with the conveying device 170 and / or the separating device 190, as described below with reference to 5 is described as an example.

To pull the material web 5 in the conveying direction F, the conveying device 170 has conveyor rollers which are arranged opposite one another and rotate in opposite directions to one another and the wings 8 of the material web with a V- or U-shaped cross section, which are still spaced apart from one another, are inserted between the conveyor rollers on the input side. During the conveying process, the wings 8 are moved further towards each other. The wings 8 can be pressed against each other between the conveyor rollers during conveying, with the edge area of the wings 8 being sealed between the conveyor rollers in order to form the longitudinal strips 16 the. When the longitudinal strip 16 is introduced, the receiving cavity 9 can immediately be closed transversely to the longitudinal direction L of the web. The at least one shipping item is then enclosed on three sides of the material web, namely on the side of the pocket base 7, on the part of the seal created by the conveyor rollers 171 and 172 in the form of the longitudinal strips 16 in the longitudinal direction L of the web and on the side of the front end region of the material web by the sealing device 180.

In an alternative embodiment, sealing rollers (not shown) are provided as a pair of rollers, which are arranged opposite one another and are arranged upstream of the conveyor rollers in the conveying direction F. Each of the sealing rollers is rotatably mounted, with at least one of the bearings being arranged to be movable by applying force and being movable relative to the other sealing roller.

According to a first embodiment, the sealing device 180 is connected upstream of the separating device 190 in the conveying direction F. In terms of process technology, the material web is first closed on the still open side by the sealing device 180, so that the at least one shipping item is now completely encased and enclosed by the material of the material web. The closing and sealing is advantageously carried out by means of and between two jaws, which extend over the entire width of the packaging bag 11 and thus transversely to the longitudinal direction L of the web. At least one of the jaws can be slidably driven by a drive, such that the at least one motor-driven jaw exerts a force of 1 bar or 10 Newtons per square centimeter from the outside on the material web, whereby the sealing takes place and the transverse strip 15 is formed . The packaging bag 11 is then formed and surrounds the shipping item.

Individual packaging bags 11 can then be separated from the material web in a further process step using the separating device 190 and thus separated. Alternatively, the separation and isolation of the packaging bag 11 can also be carried out in the procedural order as described at the beginning if it is ensured that in the final process step the sealing takes place as, for example, as described at the beginning. For this purpose, it can be useful if the at least one displaceably drivable jaw fixes the separated shipping bag 11 by means of a counter jaw and the sealing or creation of the transverse strip 15 takes place directly in conjunction with the separation and isolation from the material web. However, what is and remains essential in these embodiments and process sequences is that the sealing device 180 is at least partially in functional union with the separating device 190.

1a shows a side view of a first embodiment of the system 100 for converting the web-shaped starting material 1, which is in particular made of paper or cardboard, into packaging bags 11. A feed device 110 pulls the web-shaped starting material 1 from the material web supply 2. The feed device 110 is arranged in the vertical direction V above the material web supply 2.

Downstream of the feed device 110, the web-shaped starting material 1, which may have been formed into a grooved material web 3 in the feed device 110 by means of a grooved element 105, is guided along a support roller 115. The support roller 115 can be referred to as a loose roller or dancer. The support roller 115 is on the system 100, in the execution according to 1a on the feed device 110, movably mounted transversely to the conveying direction F. The support roller 115 is held movable relative to the retraction device 110 and/or a deflection 120 in order to carry out an evasive movement a. As in 1a shown, the evasive movement a can be aligned in the vertical direction V. The support roller preferably implements a tensioning element. It holds the web-shaped starting material 1 or, if applicable, the grooved material web between the feed device 110 and the conveyor device 170 with a predetermined dimension.

The support roller 115 can, for example, be biased downwards in the vertical direction V by a mass, in particular its own weight. Alternatively or additionally, the support roller 115 can be spring-loaded to carry out an evasive movement a. The support roller 115 is preferably designed to be free of a pneumatic actuator. Contrary to the pretension of the support roller 5, the tension force of the web-shaped starting material 1 acts as a result of a tensile force acting on the starting material web 1 in the conveying direction F through a conveyor device 170. With the help of the support roller, discontinuities between a conveying speed when pulling the web-shaped starting material web 1 from the material web supply 2 on the one hand and a conveying speed on the conveying device 170 and/or the separating device 190 on the other hand can be compensated for. By displacing the support roller 115 in the direction of the compensating movement a, the conveying path from the feed device 110 to the loading device 150 is extended, so that a buffer amount of web-shaped starting material 1 can be kept along the conveying path. The support roller 115 is framed in the vertical direction by beak sections 215, 225 of the guide elements 210, 220 of the guide device 200, which ensure a safe transfer of the material web from the exit area 119 of the feed device into the guide device 200.

At the entrance area 139 of the forming device 130, a deflection, which in the embodiment shown here as an example is implemented as a deflection roller 120, is arranged. The web-shaped starting material 1 is supported along the deflection axis U on the deflection roller 120 before it is conveyed through the forming device 130. The deflection roller 120 or deflection roller extends in the direction of the deflection axis U over more than the initial width b of the starting material web 1.

1b shows another embodiment of a system 100, which is different from the system in 1a differs by the design of the guide device 200, which will be explained in detail later. Otherwise, the execution of the system corresponds to 1b the execution in 1a .

As in 2 To recognize, the guide device 200 bridges the path of the web-shaped starting material from the feed device 110 to the deflection roller 120 at the entrance area 139 of the forming device. The guide device 200 is formed by sheet-like rigid guide elements 211, 221, between which a channel 201 is provided for the starting material. The width of the guide device 200 essentially corresponds to the initial width b of the web material. As in 2 shown, the lower guide plate 211 is designed with a width corresponding to the axial extent of the deflection roller 120 corresponding to the initial width b. The upper baffle 221 has a smaller width. The upper guide plate 221 only extends over approximately one tenth of the axial extent of the deflection roller 120 corresponding to the initial width b. The upper baffle 221 is predominantly arranged in an inclined surface. At the exit area 119 of the feed device 110, the rigid guide element 221 forms a horizontal beak section 225, which is above the (in 2 (not visible) dancer extends into the exit area 119 in order to ensure a safe introduction of the material web into the guide device 210.

3 shows a deflection with a deflection roller 120 and a holding strap 125 in the entrance area 139 of the forming 130. The web-shaped starting material 1 is guided along a peripheral contact area 121. The circumferential contact area 121 extends in the in 3 corresponding to the exemplary version shown 1a and 1b over more than 90 ° around the outer circumference of the deflection roller 120. The retaining strap 125 is in contact with a part of the peripheral contact area 121. The holding strap 125 can prevent the web-shaped starting material 1 from lifting off the deflection roller 120, which could otherwise lead to material jams or material tears. The holding strap 125 serves as a threading aid or as a guide device 200 when a new material web is introduced into the machine, as will be described in detail below. If the holding strap 125 rests on the deflection with a slight tension, this may be enough to hold the material web between the deflection 120 and the belt 125. This can prevent the starting material from being pulled back again by gravity or by the dancer. The driven belt deflection roller preferably has a freewheel which does not hinder the conveying movement of the starting material 1 during its movement in the conveying direction F, for example when the drive motor of the belt is switched off or inactive.

At the in 3 In the embodiment shown, the guide device 200 extends with both the upper guide element 220 and the lower guide element 210 up to the input area 139 of the forming device 130. The rigid guide elements 211, 221 are, as above, with regard to 1 or 2 described, formed as baffles and end in the immediate vicinity of the outer circumference of the deflection roller 120.

The guide elements 211, 221 delimit the channel 201. The channel height is less than 5 cm, in particular less than 2.5 cm, preferably less than 1 cm and/or at least 5 mm. In a first version in 1a and 3a the distance between the guide elements 211, 221 from one another and thus the channel height of the channel 201 from the feed device 110 in the conveying direction F to the deflection roller 120 decreases continuously. Thus, the lower baffle 211 and the upper baffle 221 have different slopes with respect to the horizontal direction. The gradient of the upper baffle 221 is lower than that of the lower baffle 211. This means there is enough space for the dancer 115. In another version in 1b and 3b the guide elements 211, 221 are aligned plane-parallel to one another, spaced apart by the channel height. In this embodiment, the lower baffle 211 and the upper baffle 221 thus have the same slope with respect to the horizontal direction.

The channel 201 is open in the web width direction B transverse to the conveying direction F and the vertical direction V. The channel 201 is oriented tangentially to the beginning of the circumferential contact area 121. The upper guide element 220 has in the entrance area 139 a panel 223 which projects upwards in the vertical direction V and which faces the belt deflection roller 126 and the retaining strap 125 carried by it protrudes. The aperture 223 ensures that starting material is safely guided into the forming device 130 at the entrance area 139.

Preferably one of the belt deflection rollers 126 is driven. The belt roller drive serves as a setup aid. With the help of the belt roller drive, the belt 125 and thus the material web can be gradually conveyed at a slower speed by the person setting up at the push of a button. This allows the setter to concentrate completely on threading the new starting material through the forming 130 and the conveying device 170 to the cutting device 190. Once the machine is set up, the freewheel operates and the belt runs loosely - but remains in contact with the web-shaped starting material 1 under pretension.

At the in 3 In the embodiment shown, the retaining strap 125 is guided along three belt deflection rollers 126, 127, 128, of which, for example, a belt deflection roller 126 can be driven and a belt deflection roller 127 can be movably mounted to maintain belt tension. The driven belt roller 126 can provide a driving force for conveying the raw material web 1. Optionally, the belt roller 126 is provided with a freewheel, which is arranged in terms of drive technology between the drive motor and the retaining belt 125 itself. This makes it easier to restart the system 100 or when a new material web 5 is pulled into the system 100. A second belt deflection roller 128 is arranged horizontally next to the upstream, driven belt deflection roller 126. The deflection roller 120 is arranged in the middle between them, slightly offset downwards in the vertical direction V with respect to the belt deflection rollers 126, 128. The downstream belt deflection roller 127 is placed vertically below the roller 128 arranged above it in the vertical direction V. The deflection axis U of the deflection roller 120 is located in the vertical direction V between the two belt deflection rollers 127, 128. In the direction of the deflection axis U, the holding belt 125 extends significantly shorter than the deflection roller 120. A curved guide plate 123 is between the downstream belt deflection roller 127 and the deflection roller arranged. The small arcuate guide plate 123 guides the material web in the direction of the forming roller 131.

The deflection realized here as a deflection roller 120 is arranged in the vertical direction V at the upper end and entrance area 139 of the forming device 130. The deflection roller 120 is also arranged above the feed device 110, which is located above the material web supply 2, and above the exit area 119 of the feed device 110. The deflection forms in the embodiment according to 1a and 1b or 2 the top component of the system 100. The arrangement of the deflection at the entrance 139 of the forming device 130 allows a compact design in the horizontal direction, so that the system 100 can be set up in a logistics hall with a small footprint.

3a until 3c show systems 1, which are as above with regard to the 1a , 1b and 2 are described and essentially only differ in the design of the respective guide device 200.

In general, the guide device 200 is designed and set up to guide a leading edge of a web-shaped starting material from the feed device 110 to the forming device 130. The guide device 200 bridges the distance between the output 119 of the feed device 110 and the input 139 of the forming device 130. The guide device 200 can, as shown, have a height difference from the relatively lowly arranged exit 119 of the feed device 110 and the relatively high arranged input 139 of the forming device Bridge 130. The dancer 115 is arranged at the exit 119 of the feed device 110. The guide device 200 can extend beyond the dancer in the direction of the retraction device 110. At the entrance 139 of the forming device 130, the deflection roller 120 or other deflection is provided. The guide device 200, in particular an upper guide element 220, such as the movable guide element 222 in the form of the belt 125, can expand into the input area 139 of the forming device 130. An overlap of the guide device 200 on the one hand with the exit area 119 of the feed device 110 and/or on the other hand with the entrance area 139 of the forming device 130 serves for the safe transfer of the web-shaped starting material 1.

At the in 3a and 3b In the embodiments shown, the guide device 200 comprises the retaining strap 125 as a movable guide element 222, which is guided along three belt deflection rollers 126, 127, 128. A difference from the previous one regarding 3 The variant described can be seen in the arrangement of the belt deflection roller 127 downstream of the conveying stream. The variant does not have a baffle. Instead, the downstream belt deflection roller 127 is arranged relative to the second belt deflection roller 128 transversely to the conveying direction F closer to the conveying path F of the material web. Together with guide plates 221, 211, the belt 125 forms the channel 201.

At the in 3c The embodiment shown includes the guide device 200 as a conveyor Ches guide element 222 the retaining strap 125, which is guided along four belt deflection rollers 126, 127, 128, 129. The belt 125 receives the material web very early, in the area of the belt deflection roller 126 driven by the motor, and guides it to the deflection 120. The material web is guided along the peripheral surface of the deflection roller 120 by the belt 125. Together with only one lower guide plate 211, the belt 125 forms the channel 201. In the vertical direction V upwards, the channel is not limited by a rigid guide element 222, but only by a movable guide element 222.

In the area from the exit 119 of the feed device 110 to the deflection roller 120, a guide plate 211 extends below the path of the material web. The channel-like guide device 200 for the material web is defined between the belt 125 and the guide plate 211, the channel height of which increasingly tapers. In the area of the vertically movable support roller 115, a wide free space is provided between the guide plate 211 and the belt 125 running from the driven roller 126 deflection roller 120, in which the dancer 115 is movable. This is also an advantage if a leading material web section is deformed, for example bent, and has to be “captured” by the belt 125.

Three of the four belt pulleys 127, 128, 129 are the same as before 3a and 3b Belt deflection rollers described are arranged, with the execution according to 3c the roller 126 is driven and a freewheel, not shown, is arranged between the roller 126 and the drive motor. The alternative belt guide has two belt deflection rollers 128 and 129 in the upper area, which are arranged horizontally offset from one another on the opposite sides of the deflection roller 120. According to an alternative, not shown, instead of the two horizontally offset belt deflection rollers 128, 129, only a single belt deflection roller with a sufficiently large diameter to bypass the deflection roller 120 could be provided.

A forming device 130 is described in detail below. Starting from the deflection, the starting material web 1 is conveyed downwards into and through the forming device 130 in the conveying direction F corresponding to the vertical direction V. The longitudinal edges 6 of the material web can essentially remain in the plane determined by the deflection, which extends from the deflection to the conveyor device 170. The central region of the material web is formed by the forming device 130 by folding means, which are thereby realized by folding rollers 131, 132 and 133, into a pocket base 7 of a material web 5 with a V- or U-shaped cross section, which is framed on both sides by wings 8 which extend up to extend towards the longitudinal edges 6.

The forming device 130 comprises a first folding roller 131, the roller axis of which is aligned in space parallel to the deflection axis U and is arranged offset from the deflection axis U. In the conveying direction F, an axial distance is provided between the roller axis of the first folding roller 131 and the deflection axis U. A transverse distance to the conveying direction F extends between the deflection axis U and the roller axis of the first folding roller 131. A second folding roller 132 and optionally a third folding roller 133 arranged between the first folding roller 131 and the second folding roller 132 define the path of the pocket base 7 through the Forming device 130. The roller axis of the second folding roller 132 is arranged significantly further offset in relation to the deflection axis U in the direction of the conveying direction F by the forming device 130, the axial distance, preferably by 2 times to 5 times. Transverse to the conveying direction F (in the loading direction), the second folding roller 132 is further relative to the deflection axis of the envelope distance relative to the first folding roller 131, but not more than 100%, but only about 10% - 50%. The roller axes W of the folding rollers 131, 132 and possibly 133 are spatially parallel to one another.

The folding rollers 131, 132 and 133 can be formed by a pair of roller disks 135, between which a spacer is arranged. The distance between the roller disks relative to one another in the direction of the roller axis W, defined by the spacer, can correspond to the distance between groove disks 107, 207 of a groove element 105 upstream of the forming device.

The forming device 130 has a guide surface 140, which can be realized in sections by counter-bearing rollers assigned to the folding roller 131, 132, 133. The V- or U-shaped material web 5, in particular the pocket base 7, can be guided along the guide surface 140. Preferably, the guide surface 140 extends parallel to the plane spanned by the deflection and the conveyor device. The guide surface 140 extends when executing the system 100 according to 1 or 2 in a substantially vertical plane.

4 shows a side view of a feed device 110. The feed device 110 differs from the feed device 110 essentially only in the orientation of its conveying direction F at the entrance or exit of the feed device. The feed device 110 comprises a pair of conveyor rollers 111 and 112, between which the web-shaped starting material web passes (in 4 not shown in detail) is eligible for funding. The lower conveyor roller 111 is provided with a drive device which drives the conveyor roller 111. The upper conveyor roller 112 rolls on the lower conveyor roller 111 and follows the movement of the lower conveyor roller 111.

4 shows the feed device 110 in an operating position in which the conveyor rollers 111, 112 cooperate with one another as a pair of conveyor rollers in order to withdraw the web-shaped starting material web 1 from the material web supply 2. If the system 100 has been equipped with a new material web supply 2, the leading edge of the starting material web 1 must be reinserted. To thread the web-shaped starting material web 1 into the feed device 110, the conveyor roller pair 111, 112 can be brought into a setup position (not shown in detail). For this purpose, only one of the conveyor rollers, in particular only the rotating conveyor roller 112, or both conveyor rollers 111, 112, can be moved from the operating position into a set-up position spaced therefrom, in which a threading gap is formed between the pair of conveyor rollers 111, 112. The conveyor roller 111, 112 can be moved back and forth between the operating position and the setup position manually or by an auxiliary motor, for example an electric motor. After threading has been completed, the conveyor rollers 111, 112 are brought back into the operating position and can be operated, for example by manual operation, at a slow withdrawal speed in order to draw in the starting material 1 from the material web supply 2 and convey it through the guide device 200 in the direction of the forming device 130. Optionally, manual access to the material web 1 in the guide device 200 can take place. Preferably, while the leading free edge of a new material web 1 is moving through the guide device 200, there is no manual access to it, but the process is automated.

The feed device 110 comprises a creasing element 105. In the preferred embodiment shown here, the creasing element 105 is arranged upstream of the pair of conveyor rollers 111, 112. The scoring element 105 comprises two axially offset scoring disks 107, 108. The scoring disks 107, 108 are spring-loaded on an arm 116 by a compression spring 109. It is conceivable that the grooved disks 107, 108 are held rotationally rigid.

The grooved disks 107, 108 are preferably rotatably mounted. The grooved disks 107, 108 roll on the counter bearing roller 106. The compression spring 109 pushes the grooved disks against the counter-bearing roller or counter-bearing roller 106. The web-shaped starting material (in 4 not shown in more detail) is conveyed by the feed device 110 along the groove element 105, which introduces longitudinal grooves into the web-shaped starting material 1, so that it is formed into a grooved web material 3. Downstream of the feed device 110 in the forming device 230, the folding means cause the web-shaped material 1 to be folded, preferably along the longitudinal grooves introduced by the groove element 105, in order to design the material web 5 with a V- or U-shaped cross section.

5 shows schematically the sealing and separating device 180/190. The V- or U-shaped material web 5 is conveyed in the conveying direction F by the conveying device 170 to and through the separating and sealing device 180/190. The sealing device 180 comprises a pair of jaws located opposite one another transversely to the conveying direction F, which can be pressed against one another to form a transverse strip 15 that seals a packaging bag 11. Optionally, a cold seal adhesive can be applied to the material web 5 on the inside of the receiving cavity 9, at least in the area of the longitudinal strips 16 and the transverse strips 15. The separating device 190 comprises at least one, in particular scissor-like or guillotine-like, cutting edge or alternatively a plurality of cutting-like teeth for separating a packaging bag 11 from the web-shaped starting material 1. At least one jaw of the sealing device 180 can be designed with a cutting edge of the separating device 190, so that at one Pressing the jaws against each other at the same time as the packaging bag 11 is sealed along a transverse strip 15, the packaging bag 11 is separated from the material web 5.

The features disclosed in the above description, the figures and the claims can be important both individually and in any combination for the implementation of the invention in the various embodiments.

REFERENCE SYMBOL LIST

1

web-shaped starting material

2

Material web stock

3

grooved material web

5

Material web with a U-shaped cross section

6

Longitudinal edge

7

Pocket base

8th

wing

9

receiving cavity

11

Packaging bag

15

Horizontal stripes

16

Longitudinal stripes

100

system

105

Grooving element

106

Counter bearing roller

107,108

Grooved disc

109

Compression spring

110

Feeding device

111

driven conveyor roller

112

moving conveyor whales

115

Dancer (carrying role, loose role)

116

boom

119

Exit area

120

pulley

123

Guide plate

125

Retaining strap

126, 127, 128, 129

Belt pulleys

130

Forming device

131, 132, 133

folding roller

139

Entrance area

140

Guide surface

150

Feeding device

151

loading opening

180

Sealing device

190

Separating device

200

Guidance device

201

channel

203

first (lower) channel side

205

second (upper) channel side

210

first (lower) guide element

220

second (upper) guide element

211, 221

rigid guiding element

222

movable guide element

223

cover

215, 225

Beak section

a

Evasive movement

b

Starting width

L

Longitudinal direction of the web

b

Web width direction

E

feed direction

F

Direction of conveyance

U

Deflection axis

v

Vertical direction

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 1020201141 A1 [0002, 0052]
• US 9725194 B2 [0004]
• EP 2840027 B1 [0004]

Non-patent literature cited

• DIN EN ISO 1924-2 [0008]
• DIN EN ISO 1924-3 [0008]
• DIN EN ISO 2758 [0008]

Claims (15)

System (100) for converting a web-shaped starting material (1), which defines a longitudinal direction (L) of the web and extends between two longitudinal edges (6) opposite in the direction of web width (B), in particular made of paper or cardboard, into packaging bags (11), comprising: a feed device (110) for drawing off the web-shaped starting material (1), a forming device (130) for continuously forming the web-shaped starting material (1) into a material web (5) with a V- or U-shaped cross section with a length in the longitudinal direction (L) extending receiving cavity (9), characterized in that the system (100) comprises a guide device (200) for guiding a leading edge of the web-shaped starting material (1) from the feed device (110) to the forming device (130). System (100) after Claim 1 , characterized in that the guide device (200) defines a, in particular funnel-shaped, channel (201), which is formed by a plurality of guide elements which can be brought into contact with the leading edge of the starting material, in particular a sliding contact or a driving contact. System (100) after Claim 2 , characterized in that the channel (201) tapers in the conveying direction (F) of the web-shaped starting material (1), preferably in the vertical direction (V), and / or wherein the channel (201) has a channel width which, at least in sections, preferably constant, at least corresponding to the width of the web-shaped starting material (1). System (100) after Claim 2 or 3 , characterized in that the guide device (200) comprises at least a first guide element (210) which delimits a first, in particular lower in the vertical direction (V), side (203) of the channel (201), and / or at least a second guide element (220), which delimits a second side (205) of the channel (201), which is opposite the first side, in particular in the vertical direction (V), upper side (205). System (100) according to one of the preceding claims, characterized in that the guide device (200) comprises a plurality of guide elements which are arranged next to one another and/or one behind the other with respect to the conveying direction (F). System (100) according to one of the preceding claims, characterized in that the guide device (200) bridges a distance between the feed device (110) and the forming device (130), preferably at least one, in particular first, guide element (210) being completely separated from the retraction device (110) extends to the forming device (130) and/or wherein preferably at least one, in particular second, guide element (220) extends over at least half of the distance. System (100) according to one of the preceding claims, characterized in that the guide device (200) has a height difference between an exit area (119) of the feed device (110) and the entrance area (139) arranged above the exit area (119) in the vertical direction (V). ) of the forming device (130) bridged. System (100) according to one of the preceding claims, characterized in that the guide device (200) comprises at least one rigid guide element (211, 221), such as a guide rod, a guide plate or the like, wherein the guide device (200) in particular has a plurality of rigid guide elements ( 211, 221). System (100) according to one of the preceding claims, characterized in that the guide device (200) comprises at least one conveyor-movable guide element (222), such as a belt (125), for driving the leading edge of the web-shaped starting material. System (100) after Claim 9 , characterized in that the conveyor-movable guide element is at least partially engaged with the forming device (130), in particular in an input region (139) of the forming device (130). System (100) according to one of the preceding claims, characterized in that the feed device (110) is designed and set up to feed the leading edge of the web-shaped starting material (1) through the guide device (200) from the feed device (110) to the forming device (130 ) to push. System (100) according to one of the preceding claims, characterized in that the feed device (110) comprises at least one driven feed roller (111) and at least one feed roller (112) cooperating with it, in particular driven or driven, the feed device having an operating position, in which the driven feed roller (111) and the cooperating feed roller (112) are brought closer to each other for gripping the web-shaped starting material, in particular a pretensioning force on the driven feed roller (111) and the feed roller (112) cooperating with it. pushes against each other, and wherein the feed device has a setup position in which the driven feed roller (111) and the cooperating feed roller (112) are arranged at a distance from one another. System (100) after Claim 12 , characterized in that the feed device (110) has an operating state in which the feed device (110) is designed to apply a first, in particular fast and/or variable, take-off speed to the web-shaped starting material, and a setup state in which the the feed device (110) is designed to apply a second, in particular slow and/or constant, take-off speed to the web-shaped starting material. System (100) according to one of the preceding claims, characterized in that the system (100) comprises a material web supply (2), in particular a supply roll, of the web-shaped starting material (1), from which the feed device (110) draws in the web-shaped starting material, whereby the feed device (110) and the material web supply (2) are coordinated with one another in such a way that the feed device (110) of the guide device (200) feeds the web-shaped starting material with an upward curvature in the vertical direction (V), in particular supply roll curvature, and/or an adhesive coating oriented upwards in the vertical direction (V). System (100) according to one of the preceding claims, characterized in that the deflection is arranged in relation to a vertical direction (V) in an upper input area (139), in particular at an upper end, of the forming device (130), in particular the web-shaped Starting material (1) is guided in the forming device (130) with a conveying direction (F) which is directed downwards in relation to a vertical direction (V).

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