Pressing and separating device and system for converting a web-shaped starting material into packaging bags

Abstract

Pressing and separating device (180) for a system (100) for converting a web-shaped starting material (1), which defines a web longitudinal direction (L) and extends between two longitudinal edges (6) opposite in the web width direction (B), in particular made of paper, cardboard or paperboard, into packaging pockets (11) with a forming device (130) for continuously forming the web-shaped starting material (1) into a material web with a V-shaped or U-shaped cross-section and a receiving space extending in the web longitudinal direction (L) and delimited by opposite V-shaped or U-shaped legs of the material web, comprising a pair of pressing jaws (181) consisting of two mutually associated pressing jaws (183, 185), of which at least one pressing jaw is movable relative to the other pressing jaw for pressing leading transverse edge sections of the V-shaped or U-shaped legs against one another and separating a packaging pocket (11) from the material web in the area of ​​the pressed transverse edge sections,characterized in that at least one of the pressing jaws (183, 185) is spring-loaded in the direction of movement of the at least one movable pressing jaw.

Description

[0001] The present invention relates to a pressing and separating device for a system for converting a web-shaped starting material into packaging bags, and to such a system. A web-shaped starting material defines a longitudinal web direction and extends between two opposing longitudinal edges. The web-shaped starting material preferably consists of paper, cardboard, or corrugated board.

[0002] Packaging bags, a web of packaging material, and packaging material blanks are known from DE 10 2020 114 211 A1. Such packaging bags, etc., are used in the packaging industry to pack items, especially shipping items, in particular to protect them from damage during shipping.

[0003] Various systems are known for forming packaging bags for holding items such as shipping goods from flat webs of packaging material, a formed web of packaging material and packaging material blanks.

[0004] GB 1,067,166 describes a system for packaging articles, in which a weldable input web material such as polyethylene or polypropylene is processed and guided through a feed channel bounded by side walls transverse to the web's longitudinal direction. The feed channel is dimensioned for only one specific type of identical shipping article. At the end of the feed channel, the edges of the web material are folded inwards by a pair of folding lips and sealed with a first punch to form a packaging tube. A second punch, located further downstream and movable in the vertical direction, seals the leading and trailing edges of the tube (in the web's longitudinal direction) by clamping the edges between two sealing jaws.Furthermore, the system includes a cutting unit for separating the manufactured and filled packaging bags, which moves horizontally translationally, i.e., transversely, to the longitudinal extension of the tube, similar to a jigsaw. From an ecological perspective, it is desirable to avoid weldable plastic material webs. In the system according to GB 1,067,166, the complex construction of the sealing device on the one hand and the cutting device on the other has proven to be a particular disadvantage.

[0005] A simplified sealing and cutting unit for singulating packaging pouches is known from EP 3168362 A1. However, the sealing and cutting unit is very inflexible and comprises a protruding blade that engages in a recess of a counter bearing to cut off a packaging pouch. The applicable pressing and cutting force is always constant and cannot be varied or adjusted, for example, to accommodate different resistances of the web materials used. Furthermore, it has been found that the web material can adhere to the recess of the counter bearing, potentially damaging the packaging pouches and creating a risk of process congestion.

[0006] It is an object of the invention to overcome the disadvantages of the prior art, in particular to provide a more flexible pressing and separating device for a system for converting a web-shaped starting material into packaging bags, and to provide a more flexible application, in particular in the sealing and separating process being more reliable.

[0007] This task is solved by the subject matter of the independent claims.

[0008] Accordingly, a pressing and separating device is provided for a system, particularly according to the invention, for converting a web-shaped starting material into packaging bags, wherein the starting material defines a longitudinal web direction and extends between two longitudinal edges opposite each other in the web width direction. In particular, the starting material comprises, and especially predominantly, i.e., at least 75%, and more specifically at least 80%, preferably at least 90%, paper, cardboard, or paperboard, or consists thereof. The pressing and separating device can also be referred to as a sealing unit and / or forms a functional combination of sealing and separating or singulating.When the press and separating device according to the invention is integrated into a system, particularly according to the invention, the manufacturing advantage arises that, during a separation or singulation process of a packaging bag running in the longitudinal direction from the trailing, pre-formed material web, both the trailing end of the packaging bag to be separated and the leading end of the trailing, pre-formed material web, which in turn forms the leading end of the trailing packaging bag to be separated, are formed simultaneously, i.e., separated and sealed.

[0009] Web-shaped material, like the starting material, has a longitudinal web direction. The web-shaped material preferably has a constant web / material thickness. Web-shaped material generally expands in the web width direction transversely to the web length direction and, viewed transversely to the web direction, has a particularly constant width. In the web width direction, the web-shaped material has opposite longitudinal edges. In the web width direction, the packaging material web terminates at each longitudinal edge extending in the web length direction. For example, the web-shaped starting material has a width of at least 200 mm and, in particular, at most 2000 mm. For example, the width is approximately 500 mm.Web-shaped material generally has much larger dimensions in the longitudinal direction than in the width direction. For example, the extent of the web material in the longitudinal direction can be at least 20, at least 50, at least 100, or at least 1000 times greater than in the width direction. Web-shaped material generally has much larger dimensions in the width direction than in the thickness direction. For example, the extent of the web material in the width direction can be at least 20, at least 50, at least 100, or at least 1000 times greater than the web / material thickness. Optionally, at least one longitudinal edge strip adjacent to a longitudinal edge is provided, at least partially, 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 coated with cold-sealable adhesive.

[0010] The web-like material is preferably composed predominantly or entirely of a cellulose-based material. In particular, the web-like material can be made of paper, such as recycled paper, and / or cardboard, especially corrugated board. Preferably, a web-like material is provided, in particular made of paper, cardboard, or corrugated board. The material web can be made of paper, such as recycled paper, and / or 100% recyclable paper, which may be produced without chemical additives. Recycled paper is, in particular, paper materials with a low proportion (less than 50%) of virgin fiber paper. For example, paper materials containing 70% to 100% recycled paper, especially based on waste paper, are used.The recycled paper within the meaning of this invention can be paper material that has a tensile strength index longitudinally to 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 transversely to the machine direction of at most 60 Nm / g, preferably a tensile strength of 5 Nm / g to 40 Nm / g. For determining the tensile strength or the tensile strength index, a standard such as DIN EN ISO 1924-2 or DIN EN ISO 1924-3 can be used. In addition, or alternatively, a recycled paper property can be characterized by its so-called burst 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 burst index is determined according to the standard DIN EN ISO 2758.Furthermore, the packaging material has a density of, in particular, 40 g / m² to a maximum of 140 g / m². The web-like starting material can be in the form of a roll of material or a zigzag-folded stack of packaging material, also known as a leporello stack.

[0011] The system comprises a forming device for continuously forming the web-shaped starting material into a material web with a receiving space extending in the longitudinal direction of the web. The forming device is preferably designed or configured to form the initially flat or two-dimensional, web-shaped starting material into a material web, preferably three-dimensional, with a V- or U-shaped cross-section. Furthermore, the forming device comprises a receiving space extending in the longitudinal direction of the web and bounded by opposing V- or U-shaped legs of the material web. Preferably, the receiving space of the material web has an insertion opening extending in the longitudinal direction of the web. In particular, the receiving space is bounded by a pocket base formed opposite the insertion opening and laterally by projecting 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 configured to transform an initially flat, web-shaped starting material by bending or folding at least one wing extending along a first (e.g., right in the conveying direction) or second (e.g., left in the conveying direction) longitudinal edge onto the other wing. Alternatively, the material web can be formed with a U-shaped cross-section. The forming device can be configured to bend or fold opposing wings at both opposite longitudinal edges of the initially flat, web-shaped starting material towards each other, forming a back extending along the center of the web material. In the system for transforming the web-shaped starting material, the forming device is preferably arranged downstream of a feed device in the conveying direction.

[0012] In particular, the forming device comprises at least one folding means, such as a folding roller, which can be brought into contact with the material web, such as a rolling contact, a sliding contact, or the like. The folding means can be designed and configured, in particular, 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 input material or the material web, in particular at least one upstream, downstream, or to the right or left of the folding means with respect to the conveying direction, such 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 input material or the material web can also be brought into contact with the input material or the material web.The forming device comprises at least one folding means, such as a folding roller, which presses against the web of material between the opposing longitudinal edges to introduce two wings projecting from a pocket base into the web-shaped starting material transversely to the longitudinal direction of the web. Preferably, the folding means presses against the web in the web width direction, particularly centrally between the opposing longitudinal edges.

[0013] According to a first aspect of the present invention, which can be combined with the second aspect and / or the other aspects, the pressing and separating device comprises a pair of pressing jaws consisting of two mutually associated pressing jaws, at least one of which is movable relative to the other pressing jaw for pressing forward transverse edge sections of the V or U legs against each other and for separating a packaging pocket from the material web in the area of ​​the pressed or to-be-pressed transverse edge sections. For example, both pressing jaws can also be mounted to move relative to each other, with their direction of movement being opposite and / or coordinated. The functional integration of pressing or sealing and separating or singulating makes it possible to design the device according to the invention, and thus also the entire system or machine, in a particularly compact manner.The coordination of pressing and cutting, such that the cutting occurs in the area of ​​the pressed transverse edge sections, has the further advantage that the pressing supports the cutting process. In this context, it should also be understood that the pressing and cutting occur essentially simultaneously. Pressing the material web ensures that it is held securely and fixed in place, allowing the cutting process to proceed reliably.

[0014] According to the first aspect of the present invention, at least one of the pressing jaws, in particular the movable one, is spring-loaded in the direction of movement of the at least one movable pressing jaw. In other words, the at least one spring-loaded pressing jaw, in particular the two spring-loaded pressing jaws, can deflect or be designed to be compliant in the direction of movement of the at least one movable pressing jaw. This makes it possible to adjust, limit, and / or cushion the pressing and cutting force to be transmitted, or in particular to build it up continuously. For example, the spring action of the at least one pressing jaw is achieved by means of a spring, in particular a helical compression spring, a disc spring, a leaf spring, or the like, which may in particular be made of spring steel. According to further exemplary embodiments, a gas spring or a hydraulic unit, for example with a nitrogen buffer, may also be used.These can be particularly advantageous for very large pressing and cutting devices.

[0015] According to an exemplary embodiment of the present invention, the at least one spring-loaded press jaw is supported by a spring arrangement, which is particularly elastic. The spring arrangement can comprise a helical compression spring, a disc spring, a leaf spring, or the like. According to further exemplary embodiments, a gas spring or a hydraulic unit, for example with a nitrogen buffer, can also be used.

[0016] According to another exemplary development, the spring assembly is again supported by an unsprung support. The support can, for example, be rigidly connected to the press jaws. The type and design of the spring assembly allow the transmission of pressing and deflecting forces to the material web to be adjusted or varied, so that, for example, optimal sealing—i.e., compression and separation—can be achieved for different materials in the web.

[0017] According to another exemplary embodiment, the spring action of the at least one spring-loaded press jaw is achieved by making the press jaw from a material that is particularly elastically compliant. Suitable materials for the press jaw include, for example, elastic plastics such as rubber or polyamide, or foams. In this context, it should be understood that the press jaw contains at least some of this elastically compliant material; that is, it comprises the compliant material and, in particular, consists of it.

[0018] According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a pressing and cutting device is provided for a system, in particular according to the invention, for converting a web-compatible starting material into packaging bags, wherein the starting material defines a web longitudinal direction and extends between two longitudinal edges opposite each other in the web width direction.

[0019] The system comprises a forming device for continuously forming the web-shaped starting material into a material web with a receiving space extending in the longitudinal direction of the web. The forming device is preferably designed or configured to form the initially flat or two-dimensional, web-shaped starting material into a material web, preferably three-dimensional, with a V- or U-shaped cross-section. Furthermore, the forming device comprises a receiving space extending in the longitudinal direction of the web and bounded by opposing V- or U-shaped legs of the material web. Preferably, the receiving space of the material web has an insertion opening extending in the longitudinal direction of the web. In particular, the receiving space is bounded by a pocket base formed opposite the insertion opening and laterally by projecting 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 configured to transform an initially flat, web-shaped starting material by bending or folding at least one wing extending along a first (e.g., right in the conveying direction) or second (e.g., left in the conveying direction) longitudinal edge onto the other wing. Alternatively, the material web can be formed with a U-shaped cross-section. The forming device can be configured to bend or fold opposing wings at both opposite longitudinal edges of the initially flat, web-shaped starting material towards each other, forming a back extending along the center of the web material. In the system for transforming the web-shaped starting material, the forming device is preferably arranged downstream of a feed device in the conveying direction.

[0020] In particular, the forming device comprises at least one folding means, such as a folding roller, which can be brought into contact with the material web, such as a rolling contact, a sliding contact, or the like. The folding means can be designed and configured, in particular, 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 input material or the material web, in particular at least one upstream, downstream, or to the right or left of the folding means with respect to the conveying direction, such 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 input material or the material web can also be brought into contact with the input material or the material web.The forming device comprises at least one folding means, such as a folding roller, which presses against the web of material between the opposing longitudinal edges to introduce two wings projecting from a pocket base into the web-shaped starting material transversely to the longitudinal direction of the web. Preferably, the folding means presses against the web in the web width direction, particularly centrally between the opposing longitudinal edges.

[0021] The pressing and separating device comprises a pair of pressing jaws consisting of two mutually associated pressing jaws, at least one of which is movable relative to the other pressing jaw for pressing forward transverse edge sections of the V- or U-shaped legs against each other. For example, both pressing jaws can also be mounted to move relative to each other, with their direction of movement being opposite and / or coordinated.

[0022] According to a further aspect of the present invention, a cutting device is arranged on at least one press jaw and / or at least one press jaw is configured such that the cutting device is released, particularly continuously, when the press jaws are pressed against each other to separate a packaging pocket from the material web, and is retracted, particularly continuously, when the press jaws move apart relative to the associated press jaw. For example, the cutting device can be arranged on at least one press jaw in such a way that the cutting device is only released, and thus becomes visible, during a pressing or cutting process, and is otherwise inaccessible, thereby creating a reliable device.This can be achieved by a specific arrangement of the cutting unit in relation to the press jaw, in particular both press jaws, and / or by a specific design of the at least one press jaw. An advantage of this design according to the invention is the compactness of the pressing and cutting device as well as its safety against injuries. A further significant advantage of releasing and retracting the cutting unit in relation to the press jaw is that the relative movement between the press jaw and the cutting unit, particularly in a direction parallel to the direction of movement of the at least one movable press jaw, may strip off any web material that may have become stuck to the cutting unit. This stripping function makes it possible to avoid process jams and / or damage to the packaging pouches to be cut and / or the trailing web of material.

[0023] In an exemplary embodiment of the pressing and cutting device according to the invention, the at least one pressing jaw comprises two parallel, and in particular identical, pressing jaw segments, which are arranged at a distance from each other, forming a gap, by which the cutting device is arranged. For example, the gap dimension can be matched to a dimension of the cutting device, in particular its cutting edge, in particular such that the cutting device is guided by the two pressing jaw segments when released and retracted, in particular when extended and retracted, so that a precise cutting cut can be made. The gap is, for example, significantly smaller than the dimension of the cutting device or the pressing jaw segments transverse to the gap dimension, in particular in the web width direction.For example, the press jaw pair thus comprises two pairs of press jaw segments, with each press jaw segment of one pair positioned opposite a press jaw segment of the other pair and arranged in such a way that the respective press jaw segments come into contact during the cutting and pressing process. All press jaw segments, as well as the cutting unit, can be oriented essentially parallel to each other and / or perpendicular to the longitudinal direction of the web.

[0024] According to an exemplary embodiment of the pressing and cutting device according to the invention, the further pressing jaw comprises two pressing jaw segments identical to the at least one pressing jaw, which are arranged at a distance from each other, forming a gap in which the cutting device can engage when the pressing jaws are pressed against each other, in particular to carry out the cutting operation. The gap and the arrangement of the respective pressing jaw segments can be designed according to the exemplary embodiment described above with respect to the at least one pressing jaw.

[0025] For example, the jaw segments of a press jaw can be manufactured from a single piece or be separate components. Furthermore, in an embodiment where the jaw segments are separate components, they can be individually spring-loaded. It is also possible, in an embodiment where the jaw segments of a press jaw are separate components, for them to be supported by a common spring. In yet another exemplary embodiment, at least one jaw segment of one of the two press jaws is spring-loaded, wherein the two jaw segments, in particular at least one jaw segment, of the opposing press jaw are rigid, in particular unsprung, and / or are fixedly connected to a support of the pressing and / or cutting device.According to a further exemplary embodiment of the present invention, at least one pair of press jaw segments of a press jaw, in particular the press jaw which has the cutting device, is arranged relative to each other such that, when pressed against each other with the opposing press jaw, which may, for example, be identical in design, they displace each other in a direction transverse, in particular substantially perpendicular, to the direction of movement or pressing direction, thereby creating or increasing a gap between the press jaw segments, so that the cutting device is released, in particular continuously, to carry out the cutting process. In a simple embodiment of the pressing and cutting device according to the invention, the pair of press jaws can be arranged on a base plate, which is in particular stationary, wherein one press jaw can be fixed in place on the base plate.The other press jaw is movable, for example mounted via a crank drive and / or a connecting rod joint, whereby pressure lift cylinders can also be used to carry out the sealing, i.e. the pressing and separation.

[0026] In a further exemplary embodiment of the pressing and cutting device according to the invention, it is characterized by a passive state in which the pressing jaws release the material web and the cutting device projects by at most 5%, in particular at most 3 mm, in particular at most 4%, at most 3%, or at most 2% of its longitudinal extent in the direction of movement of the movable pressing jaw beyond a pressing surface of the associated pressing jaw facing the other pressing jaw. The pressing and cutting device can furthermore have a pressing end state in which the cutting device projects by at least 10%, in particular at least 12.5%, at least 15%, or at least 17.5% of its longitudinal extent in the direction of movement of the movable pressing jaw beyond the pressing surface. According to an exemplary further development, the cutting device is adjustable with respect to the pressing jaw associated with the current device.Alternatively or additionally, the respective pressing jaw can also be adjustable in relation to the cutting device, allowing for different overhangs of the cutting device relative to the pressing surface in both versions. It has been found that such adjustability allows for adaptation to the dimensions of the mailing bags to be cut. For example, it has been observed that the mailing bags slide more easily between the pressing jaws without scraping or catching on the cutting elements, such as the cutting teeth, of the cutting device. Alternatively or additionally, in addition to the cutting device protruding from the pressing jaw, the jaw can also retract during a pressing and cutting process to release the cutting device.

[0027] According to a further exemplary embodiment, the cutting device is released by the fact that, when the pressing jaws are pressed against each other, the pressing jaw assigned to the cutting device is displaced by the opposing pressing jaw, in particular by elastic displacement. This allows for a particularly simple pressing and cutting device, since the displacement of the opposing pressing jaw by the other pressing jaw essentially allows the pressing and cutting device to automatically perform both the pressing and cutting operations. Furthermore, the deformation restoring force, which is particularly elastic, can provide the stripping function, making it possible to strip off any web material that may have become stuck, or generally to prevent web material from getting stuck.

[0028] According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a pressing and separating device is provided for a system, particularly according to the invention, for converting a web-like starting material into packaging bags, wherein the starting material defines a longitudinal web direction and extends between two longitudinal edges opposite each other in the web width direction. In particular, the starting material comprises, and especially predominantly, i.e., at least 75%, and more specifically at least 80%, preferably at least 90%, paper, cardboard, or paperboard, or consists thereof. The pressing and separating device can also be referred to as a sealing unit and / or forms a functional combination of sealing and separating or singulating.When the press and separating device according to the invention is integrated into a system, particularly according to the invention, the manufacturing advantage arises that, during a separation or singulation process of a packaging bag running in the longitudinal direction from the trailing, pre-formed material web, both the trailing end of the packaging bag to be separated and the leading end of the trailing, pre-formed material web, which in turn forms the leading end of the trailing packaging bag to be separated, are formed simultaneously, i.e., separated and sealed.

[0029] The system comprises a forming device for the continuous forming of web-shaped starting material into a material web with a receiving space extending in the longitudinal direction of the web. The forming device is preferably designed or configured to form the initially flat or two-dimensional, web-shaped starting material into a material web, preferably three-dimensional, with a V- or U-shaped cross-section. Furthermore, the forming device comprises a receiving space extending in the longitudinal direction of the web and bounded by opposing V- or U-shaped legs of the material web. Preferably, the receiving space of the material web has an insertion opening extending in the longitudinal direction of the web. In particular, the receiving space is bounded by a pocket base formed opposite the insertion opening and laterally by projecting 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 configured to transform an initially flat, web-shaped starting material by bending or folding at least one wing extending along a first (e.g., right in the conveying direction) or second (e.g., left in the conveying direction) longitudinal edge onto the other wing. Alternatively, the material web can be formed with a U-shaped cross-section. The forming device can be configured to bend or fold opposing wings at both opposite longitudinal edges of the initially flat, web-shaped starting material towards each other, forming a back extending along the center of the web material. In the system for transforming the web-shaped starting material, the forming device is preferably arranged downstream of a feed device in the conveying direction.

[0030] In particular, the forming device comprises at least one folding means, such as a folding roller, which can be brought into contact with the material web, such as a rolling contact, a sliding contact, or the like. The folding means can be designed and configured, in particular, 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 input material or the material web, in particular at least one upstream, downstream, or to the right or left of the folding means with respect to the conveying direction, such 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 input material or the material web can also be brought into contact with the input material or the material web.The forming device comprises at least one folding means, such as a folding roller, which presses against the web of material between the opposing longitudinal edges to introduce two wings projecting from a pocket base into the web-shaped starting material transversely to the longitudinal direction of the web. Preferably, the folding means presses against the web in the web width direction, particularly centrally between the opposing longitudinal edges.

[0031] According to a further aspect of the present invention, the pressing and separating device comprises a pair of pressing jaws consisting of two mutually associated pressing jaws, at least one of which is movable relative to the other pressing jaw for pressing forward transverse edge sections of the V or U legs against each other and for separating a packaging pocket from the material web in the area of ​​the pressed or to-be-pressed transverse edge sections. For example, both pressing jaws can also be mounted to move relative to each other, with their direction of movement being opposite and / or coordinated. The functional integration of pressing or sealing and separating or singulating makes it possible to design the device according to the invention, and thus also the entire system or machine, in a particularly compact manner.The coordination of pressing and cutting, such that the cutting occurs in the area of ​​the pressed transverse edge sections, has the further advantage that the pressing supports the cutting process. In this context, it should also be understood that the pressing and cutting occur essentially simultaneously. Pressing the material web ensures that it is held securely and fixed in place, allowing the cutting process to proceed reliably.

[0032] According to a further aspect of the invention, the pressing and separating device comprises a gearbox assigned to at least one of the pressing jaws for providing a pressing force to the pair of pressing jaws. For example, the gearbox can be a linear actuator or at least part of a linear actuator, which has a working element that is, in particular, linearly movable and thereby provides the separating and pressing force for the pair of pressing jaws. In the context of this aspect, it can also be understood that the gearbox is implemented by a pneumatic cylinder, particularly in order to provide a cost-effective pressing and separating device. In general, by providing a gearbox, a desired force transmission can be reliably achieved and / or a desired level of the force to be transmitted can be set and / or varied. The gearbox thus supports the provision of a flexibly deployable pressing and separating device.

[0033] According to a further exemplary embodiment of the pressing and separating device according to the invention, the at least one movable pressing jaw is movable along a linear pressing and releasing direction. This linear pressing and releasing direction can also be described as an opening and closing movement. For example, the movement of the at least one movable pressing jaw is such that it can transmit different drive forces to the pressing jaw depending on the progress of the movement. For example, the force required for an opening movement, i.e., a movement away from each other of the two pressing jaws, is less than for a closing movement, i.e., a movement towards each other of the two pressing jaws, at least in the state of pressing contact between the two pressing jaws. For example, the gearbox can be coupled to a linear drive.

[0034] According to a further exemplary embodiment of the pressing and separating device according to the invention, the gearbox is designed to convert the mechanical work performed by a power source, such as a motor, in particular a rotary motor, into a particularly linear pressing and releasing movement direction of the at least one movable pressing jaw.

[0035] In a further exemplary embodiment of the present invention, the gearbox features a non-linear force transmission function. For example, the gearbox is configured to adjust the pressing force transmitted to the pair of press jaws depending on the operating state, in particular the angular position of a gearbox output shaft, of the pressing and separating device. The operating-state-dependent force applied to the press jaws can be set and ensured by means of the non-linear force transmission function. For example, the pressing force is largely determined by the spring arrangement. The stroke of the gearbox always remains constant or depends on the degree of the eccentric / crank deflection. The pressing force itself is determined by the counter-pressure of the springs. The pressing force can be set such that at the end of the pressing process, the pressing surfaces of the press jaws experience a surface load of 100,000 N / m². 2 experienced (or converted to 0.1 N / mm²)2 or 1 bar). Through the interplay of spring rate, spring preload and spring travel, it is possible, for example, to set desired pressing forces depending on the material of the web.

[0036] In another exemplary embodiment, the transmission comprises a linkage mechanism, in particular with a double centrally acting pushrod, especially similar to a boxer engine, a toggle joint, a cam disc, several cams and / or a cam disc. In particular, the linkage mechanism based on a double centrally acting pushrod has proven to be efficient and practical with regard to manufacturing costs, system complexity, and usability in a system based on two press jaws, especially those that move in opposite directions.

[0037] In another exemplary embodiment of the pressing and separating device according to the invention, the gearbox is coupled to a power source, such as a motor, particularly a rotary motor, via an intermediate gear, such as a worm, spur, planetary, or bevel gear, for the particularly linear adjustment of the speed-torque ratio. The inventors of the present invention have found that, although accepting a slightly reduced efficiency, the provision of an intermediate gear can be advantageous with regard to installation space and cost. In principle, it is also conceivable to provide a direct drive, a so-called torque motor.

[0038] According to another exemplary embodiment, the press jaws comprise metal, in particular steel, aluminium or bronze, or wood, plastics or other materials; in particular, they consist of the respective materials.

[0039] According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a system for converting a web-like starting material into packaging bags is provided, wherein the starting material defines a longitudinal web direction and extends between two longitudinal edges opposite each other in the web width direction. In particular, the starting material comprises, and especially predominantly, i.e., at least 75%, and more specifically at least 80%, preferably at least 90%, paper, cardboard, or paperboard, or consists thereof. The pressing and separating device can also be referred to as a sealing unit and / or forms a functional combination of sealing and separating or singulating.When the press and separating device according to the invention is integrated into a system, particularly according to the invention, the manufacturing advantage arises that, during a separation or singulation process of a packaging bag running in the longitudinal direction from the trailing, pre-formed material web, both the trailing end of the packaging bag to be separated and the leading end of the trailing, pre-formed material web, which in turn forms the leading end of the trailing packaging bag to be separated, are formed simultaneously, i.e., separated and sealed.

[0040] Web-shaped material, like the starting material, has a longitudinal web direction. The web-shaped material preferably has a constant web / material thickness. Web-shaped material generally expands in the web width direction transversely to the web length direction and, viewed transversely to the web direction, has a particularly constant width. In the web width direction, the web-shaped material has opposite longitudinal edges. In the web width direction, the packaging material web terminates at each longitudinal edge extending in the web length direction. For example, the web-shaped starting material has a width of at least 200 mm and, in particular, at most 2000 mm. For example, the width is approximately 500 mm.Web-shaped material generally has much larger dimensions in the longitudinal direction than in the width direction. For example, the extent of the web material in the longitudinal direction can be at least 20, at least 50, at least 100, or at least 1000 times greater than in the width direction. Web-shaped material generally has much larger dimensions in the width direction than in the thickness direction. For example, the extent of the web material in the width direction can be at least 20, at least 50, at least 100, or at least 1000 times greater than the web / material thickness. Optionally, at least one longitudinal edge strip adjacent to a longitudinal edge is provided, at least partially, 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 coated with cold-sealable adhesive.

[0041] The web-like material is preferably made predominantly or entirely of a cellulose-based material. In particular, the web-like material can be made of paper, such as recycled paper, and / or cardboard, especially corrugated board. Preferably, a web-like material made of paper, cardboard, or corrugated board is provided. The material web can be made of paper, such as recycled paper, and / or 100% recyclable paper, which may be produced without chemical additives. Recycled papers are, in particular, paper materials with a low proportion (less than 50%) of virgin fiber paper. For example, paper materials containing 70% to 100% recycled paper, especially based on waste paper, are used.The recycled paper within the meaning of this invention can be paper material that has a tensile strength index longitudinally to 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 transversely to the machine direction of at most 60 Nm / g, preferably a tensile strength of 5 Nm / g to 40 Nm / g. For determining the tensile strength or the tensile strength index, a standard such as DIN EN ISO 1924-2 or DIN EN ISO 1924-3 can be used. In addition, or alternatively, a recycled paper property can be characterized by its so-called burst 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 burst index is determined according to the standard DIN EN ISO 2758.Furthermore, the packaging material has a density of, in particular, 40 g / m² to a maximum of 140 g / m². The web-like starting material can be in the form of a roll of material or a zigzag-folded stack of packaging material, also known as a leporello stack.

[0042] The system comprises a forming device for continuously forming the web-shaped starting material into a material web with a receiving space extending in the longitudinal direction of the web. The forming device is preferably designed or configured to form the initially flat or two-dimensional, web-shaped starting material into a material web, preferably three-dimensional, with a V- or U-shaped cross-section. Furthermore, the forming device comprises a receiving space extending in the longitudinal direction of the web and bounded by opposing V- or U-shaped legs of the material web. Preferably, the receiving space of the material web has an insertion opening extending in the longitudinal direction of the web. In particular, the receiving space is bounded by a pocket base formed opposite the insertion opening and laterally by projecting 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 configured to transform an initially flat, web-shaped starting material by bending or folding at least one wing extending along a first (e.g., right in the conveying direction) or second (e.g., left in the conveying direction) longitudinal edge onto the other wing. Alternatively, the material web can be formed with a U-shaped cross-section. The forming device can be configured to bend or fold opposing wings at both opposite longitudinal edges of the initially flat, web-shaped starting material towards each other, forming a back extending along the center of the web material. In the system for transforming the web-shaped starting material, the forming device is preferably arranged downstream of a feed device in the conveying direction.

[0043] In particular, the forming device comprises at least one folding means, such as a folding roller, which can be brought into contact with the material web, such as a rolling contact, a sliding contact, or the like. The folding means can be designed and configured, in particular, 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 input material or the material web, in particular at least one upstream, downstream, or to the right or left of the folding means with respect to the conveying direction, such 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 input material or the material web can also be brought into contact with the input material or the material web.The forming device comprises at least one folding means, such as a folding roller, which presses against the web of material between the opposing longitudinal edges to introduce two wings projecting from a pocket base into the web-shaped starting material transversely to the longitudinal direction of the web. Preferably, the folding means presses against the web in the web width direction, particularly centrally between the opposing longitudinal edges.

[0044] The system according to the invention also comprises a pressing and separating device downstream of the forming device, designed according to one of the aspects or exemplary embodiments of the invention, for simultaneously pressing forward transverse edge sections of the V or U legs against each other and separating a packaging pocket from the material web in the area of ​​the pressed transverse edge sections.

[0045] According to a further aspect of the present invention, which can be combined with the preceding aspects and exemplary embodiments, a packaging technology production station is provided comprising a system designed according to the invention and a supply of web-shaped starting material, which defines a web longitudinal direction and protrudes between two longitudinal edges opposite each other in the web width direction, in particular made of paper, cardboard or corrugated board, from which the system can draw the starting material. In other words, the system is configured to draw starting material from the supply of starting material.

[0046] Preferred embodiments are specified in the dependent claims.

[0047] Further properties, features and advantages of the invention will be clarified below by means of a description of preferred embodiments of the invention with reference to the accompanying exemplary drawings, which show: Fig. 1 an exemplary embodiment of a system according to the invention for converting a web-shaped starting material into packaging bags; Fig. 2 the system out Fig. 1 in another view; Fig. 3 an exemplary embodiment of a pressing and cutting device according to the invention; Fig. 4, Fig. 5 the pressing and cutting device Fig. 3 in other operating states; Fig. 6, Fig. 7 further schematic diagrams illustrating the operation of an exemplary embodiment of the pressing and cutting device according to the invention; and Fig. 8-10 schematic principle sketches of an exemplary embodiment of a packaging bag produced by means of a system according to the invention.

[0048] To simplify readability, the following description of preferred embodiments of the various aspects of the invention that can be realized individually or combined uses the same or similar reference numerals for the same or similar components of different designs of pressing and cutting devices as well as systems for converting a web-like starting material into packaging bags. Those skilled in the art will understand that, although the exemplary embodiments of a system described below sometimes embody several combined aspects of the invention, the various aspects can each be realized individually or in any combination.

[0049] A system according to the invention for converting a web-shaped starting material, which defines a longitudinal web direction and extends between two longitudinal edges opposite each other in the web width direction, into packaging bags, is generally designated by reference numeral 100. The web-shaped starting material 1 is preferably made of or consists of cardboard, paperboard, or paper. In addition to cardboard or paper, the starting material 1 may comprise an adhesive or the like for sealing the packaging bags 11 to be formed.

[0050] As in Fig. 1 or Fig. As shown in Figure 2, the web-shaped starting material 1 for the system 100 can be provided 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 without cranes or similar lifting aids. Instead, for example, a mobile support frame 20 can be used for a material web supply 2, as shown in Figure 2. Fig. 2. The support frame 20 itself can be mechanically coupled to the system 100, for example by plugging, snapping, screwing, or clipping, to achieve optimized alignment of the web-shaped input material 1 relative to a feed device 110. The web-shaped input material 1, wound into the material web supply 2, has a web width direction B. The extent of the input material 1 in the web width direction B corresponds to the cylinder height of the coil-shaped material web supply 2. The opposing circular base surfaces of the coil-shaped or cylindrical material web supply 2 are formed by opposing longitudinal edges 6 of the input material web 1. To form the coil-shaped material web supply 2, the input material web 1 is wound in the direction of its longitudinal web direction L.

[0051] System 100 and, if applicable, the support frame 20 stand on a surface, such as a hall floor, which extends essentially horizontally. A vertical direction V extends orthogonally across this surface in the direction of gravity.

[0052] To process the web-like input material 1 into a multitude of packaging bags 11 by the system 100, the input material web 1 is guided and pulled through the system 100 in a conveying direction corresponding to its longitudinal direction L, and is thereby unwound from the roll-like material web supply 2. Within the various components of the system 100, the local conveying direction along which the web-like material 1 is moved can be varied with respect to the vertical direction V as well as with respect to a horizontal direction.

[0053] The conveying path of the input material conveyor 1 through system 100 according to the in Fig. 1 or Fig. In the two exemplary embodiments shown, the process generally proceeds (in successive order according to the following list of system components) from a material web supply 2 through a feed device 110, along a tensioning device, such as a support roller, to a deflection, such as a deflection roller 120, and then to a forming device 130 and a subsequent feeding device 150, and further to a conveying device 170 and a pressing and cutting device 180 in particular according to the invention.

[0054] In the exemplary embodiments shown here, the web-shaped starting material 1 extends from the material web supply 2 to the deflection roller 120 in the web width direction B, essentially flat, particularly in a horizontal direction. Starting from the deflection, 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 space extending in the web longitudinal direction L. The receiving space is bounded on one side by a pocket base and on both sides by wings projecting transversely to the conveying direction and / or web longitudinal direction L, and extends in the web longitudinal direction L. From the forming device 130, the starting material web 1, pre-formed into a material web with a V- or U-shaped cross-section, is transferred to the feeding device 150.The loading device 150 has a loading opening 151 opposite the bottom of the pocket, through which shipping items 21 can be inserted into the receiving chamber. The conveying device 170 pulls the V- or U-shaped web of material, containing at least one shipping item 21, from the loading device 150 in the conveying direction. A pressing and cutting device 180 serves to seal the packaging pockets and, essentially simultaneously, to cut the sealed packaging pockets containing a shipping item 21 from the web of material.

[0055] The infeed device 110 is arranged vertically V above the material web supply 2. Downstream of the infeed device 110, the web-shaped input material 1, which may have been formed into a grooved web within the infeed device 110 by means of a grooving element 105, is guided along a support roller. The support roller can be called a float roller or dancer and may be capable of forming a web storage area. The support roller is attached to the system 100, in the embodiment according to Fig. 1 on the infeed device 110, mounted so as to be movable transversely to the conveying direction. The support roller is held movable to allow for an evasive movement relative to the infeed device 110 and / or a deflection 120. As shown in Fig. As shown in Figure 1, the evasive movement can be aligned in the vertical direction V.

[0056] The feed device 110 comprises pairs of conveying rollers 111 and 112, between which the web-shaped input material web can be conveyed, wherein at least one pair of conveying rollers is driven.

[0057] In the upstream section of the forming device 130, a deflection element, which in the exemplary embodiment shown here is implemented as a deflection roller 120, is arranged. The web-shaped input material 1 is supported along the deflection axis U against the deflection roller 120 before being conveyed through the forming device 130. The deflection roller 120 extends in the direction of the deflection axis U over more than the output width b of the input material web 1.

[0058] The deflection, implemented here as a deflection roller 120, is arranged vertically above the forming device 130 in the vertical direction V. The deflection roller 120 is also arranged above the feed device 110, which is located above the material web supply 2. In the embodiment according to Fig. 1 or Fig. 2 the uppermost component of the system 100. The arrangement of the deflection between the feed device 110 and the forming device 130 allows for a compact design in the horizontal direction, so that the system 100 can be set up in a logistics hall with a particularly narrow footprint.

[0059] An exemplary embodiment of a forming device 130 is described below. Starting from the deflection point, the input material web 1 is conveyed downwards in the conveying direction corresponding to the vertical direction V into and through the forming device 130. The longitudinal edges 6 of the material web can remain essentially in the plane defined by the deflection point, which extends from the deflection roller 120 to the conveying element 170. The central area of ​​the material web in the web width direction B is formed by folding means, implemented here by folding rollers 131, 132, into a pocket base 7 of a material web with a V- or U-shaped cross-section, which is framed on both sides by wings extending to the longitudinal edges 6.

[0060] The forming device 130 comprises a first folding roll 131, the roll axis W of which is aligned parallel to the deflection axis U and offset from the deflection axis U. In the conveying direction, an axial distance is provided between the roll axis W of the first folding roll 131 and the deflection axis U. Transversely to the conveying direction, a reversal distance extends between the deflection axis U and the roll axis W of the first folding roll 131. A second folding roll 132, and optionally a third folding roll arranged between the first folding roll 131 and the second folding roll 132, define the path of the pocket bottom 7 through the forming device 130.

[0061] The folding rollers 131, 132 are formed by a pair of rolling discs 135, between which a spacer is arranged. The distance between the rolling discs 135 relative to each other in the direction of the roller axis W, defined by the spacer, can correspond to the distance between the creasing discs 107 of the creasing element 105 upstream of the forming device 130.

[0062] The forming device 130 has a guide surface 140, which is realized section by counter-bearing rollers 141, 142, 143 assigned to the conveying rollers 131, 132. The V- or U-shaped formed material web, in particular the pocket base 7, can be guided along the guide surface 140. Preferably, the guide surface 140 extends parallel to the plane defined by the deflection 120 and the conveying device 170. In the embodiment of the system 100 according to the Fig. 1 or Fig. 2 in a substantially vertical plane. The guide surface 140 extends through both the forming device 130 and the feeding device 150. Several sections of the guide surface 140 and counter-bearing rollers 141, 142, 143 and 145 arranged therein form a section surface for the outside of the material web in the area of ​​the pocket base 7.

[0063] The counter bearing rollers 141, 142, 143 and 145 are arranged in the area of ​​the feeding device 150 in the feeding direction E opposite the feeding opening 151.

[0064] The counter-bearing rollers 141, 142, 143, and 145 limit, in the loading direction E, the depth to which a (not shown) shipping item 21 can be inserted and brought into contact with the pocket base 7. The loading direction E is oriented horizontally. In the conveying direction, the loading opening 151 has a clear length f. Transverse to the conveying direction, the loading opening 151 has a clear width q. The clear length f and the clear width q of the loading opening 151 are defined by a frame 155 that completely surrounds the loading opening 151.

[0065] Downstream of the feeding device 150, a conveying device 170 is arranged, which can grip the longitudinal edges 6 of the material web and convey it in the conveying direction. Downstream of the conveying device 170, a pressing and separating device 180 is provided for forming and singulating packaging bags 11 from the web-shaped input material 1.

[0066] With reference to the Fig. Figures 3-7 describe exemplary embodiments of a pressing and cutting device 180 according to the invention for a system for converting the web-shaped starting material 1 into packaging bags 11, as they are used, for example, in the Fig. Figures 8-10 are shown and explained.

[0067] The pressing and separating device 180 according to the exemplary embodiments shown comprises as its main components a pair of pressing jaws 181 consisting of two mutually associated pressing jaws 183, 185, which, as shown in the Fig. 6 and Fig. As shown in Figure 7, the press jaws each comprise two parallel press jaw segments 187, 189 and 191, 193, respectively. The press jaws 183, 185, in particular their press jaw segments 187-193, extend transversely to the web longitudinal direction L and transversely to the vertical direction V, essentially in the width direction B of the preformed packaging bag 11, which already contains a shipping item 21. If the press and cut device 180 according to the invention is integrated into an, for example, system 100 according to the invention, the press and cut device 180 serves to press and cut a trailing end, in particular transverse edge sections, of the packaging bag 11 to be cut and sealed, and to press or seal a leading end, in particular transverse edge sections, of the preformed material web to be fed to the press and cut device 180.

[0068] As it is in the Fig. As can be seen in Figures 3-7, the two press jaws 183, 185 are spring-loaded, in particular each via a spring arrangement 195, 197, mounted on a respective support 199, 201. Fig. Figures 3-5 show a pressing and cutting process in three different operating positions, whereby Fig. 3 the fully open position, in Fig. 4 an intermediate position in which the at least one movable press jaw 185 is displaced, and in Fig. 5 represents the complete closed position in which the separation and sealing process essentially takes place.

[0069] In the exemplary design according to the Fig. 3 - 7 is a cutting device 203, which is designed as a knife or cutting strip extending essentially over the entire width of the press jaws 183, 185, and is assigned to the movably mounted press jaw 185. Referring to the Fig. 6 and Fig. Figure 7 shows that the cutting device 203 is arranged at a vertical distance a between the associated press jaw segments 193, 191. Furthermore, the cutting device is stationary. The two press jaws 183, 185 are essentially identical in construction, whereby during a pressing operation (cf. Fig. 7) The respective press jaw segments 187, 191 and 189, 193, respectively, which are assigned to and facing each other, come into press contact. During the pressing process, the cutting device 203 engages in the gap a* existing between the press jaw segments 187, 189 of the opposite press jaw 183 and cuts the material web to separate a packaging bag 11. Through the selected arrangement of press jaws 183, 185 and cutting device 203, as well as the interaction with the spring arrangements 195, 197 and, if applicable, the particularly elastically compliant material, the present invention achieves a compact, easily implemented functional combination of sealing and separation. When the press jaw segments 187 - 193 are pressed against each other, the press jaw 185 assigned to the cutting device 203 is displaced by the opposite press jaw 183, so that the cutting device 203 is released and the material web can be cut ( Fig. 7) After a separation and sealing process, as described in Fig. As indicated by 5 or 7, the press jaws 183, 185 move back into their positions. Fig. The starting position shown in Figures 3 and 6. A further advantageous aspect comes to the fore: when the spring force of the spring assemblies 195, 197 is released, the cutting device 203 springs back in relation to the press jaws 183, 185, and any web material that may have become stuck on the cutting device 203 is wiped off and removed, thus reducing the risk of paper jams and damage to a packaging bag 11.

[0070] Referring again to the Fig. Sections 3-5 explain in more detail the activation of the pressing and separating device 180 and the displacement of the movable pressing jaw 185. A gearbox 205 is provided to apply the drive force supplied by a motor, in particular a rotary motor, to the pressing jaw 185. According to the exemplary descriptions, the gearbox 205 is capable of converting the rotary drive force supplied by the motor into a translational, linear movement, in particular an opening and closing movement, of the pressing jaw 185. The gearbox 205 is, for example, a linkage gearbox with a double centrally acting pushrod 207. As can be seen from the sequence of the Fig. As can be seen in Figures 3-5, a rotational movement initiated in the motor is transferred into a shaft 209 around a rotational axis R into a translational movement T, which corresponds to a linear pressing and releasing movement direction for pressing and re-releasing the two press jaws 183, 185.

[0071] Fig. Figure 8 shows a side view of a shipping bag or packaging bag 11. The packaging bag 11 is sealed by transverse strips 15 and, opposite the bag base 7, by a longitudinal strip 16. Inside the packaging bag 11 is a shipping item 21, shown with dashed lines. The shipping item 21 has a length s. L and a piece height s H The total length g of the packaging bag 11 corresponds to the sum of the piece lengths s. L , the predetermined distance c and the second distance d. The Fig. 9 and Fig. 10 show other views of the in Fig.8 shown packaging bag 11.

[0072] The features disclosed in the foregoing description, figures and claims can be important for the realization of the invention in its various embodiments, both individually and in any combination. Reference symbol list 1. web-shaped starting material 2 Material web stock 6 Longitudinal edge 7 Pocket Ground 11 Packaging bag 15 horizontal stripes 16 longitudinal stripes 20 mobile support frame 21 shipping items 100 System 105 Grooving element 107 Grooved disc 110 Feed device 111, 112 Conveyor roller 120 pulley 130 forming device 131, 132 Folding roller 135 Roller disc 140 guide surface 141, 142, 143, 145 Counter bearing roller 150 loading device 151 Loading opening 155 frames 170 Conveyor device 180 Pressing and cutting device 181 pairs of press jaws 183, 185 Press jaw 187, 189, 191, 193 press jaw segment 195, 197 Spring arrangement 199, 201 carriers 203 Cutting device 205 gearbox 207 Push crank 209 wave R axis of rotation T Translational movement a distance or gap a* distance or gap b Starting width c predetermined distance d second distance f clear length g Total length q clear width s L piece length s H Unit height L Longitudinal direction of the railway B Lane width direction E Feed direction U deflection axis V Vertical direction W roller axle QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2020 114 211 A1

[0002] GB 1,067,166

[0004] EP 3168362 A1

[0005]

Claims

[1] Pressing and separating device (180) for a system (100) for converting a web-shaped input material (1) defining a web longitudinal direction (L) and extending between two longitudinal edges (6) opposite each other in the web width direction (B), in particular made of paper, cardboard or paperboard, into packaging bags (11) with a forming device (130) for continuously forming the web-shaped input material (1) into a material web with a V- or U-shaped cross-section and a receiving space extending in the web longitudinal direction (L) bounded by opposing V- or U-legs of the material web, comprising a pair of press jaws (181) of two mutually associated press jaws (183, 185), at least one of which is movable relative to the other press jaw for pressing forward transverse edge sections of the V- or U-legs against each other and separating a packaging bag (11) from the material web in the area of ​​the pressed transverse edge sections,characterized by , that at least one of the press jaws (183, 185) is spring-loaded in the direction of movement of the at least one movable press jaw. [2] Pressing and cutting device (180) according to claim 1 characterized by , that the at least one spring-loaded press jaw is supported on a particularly elastic spring arrangement, wherein in particular the spring arrangement is supported on an unsprung support. [3] Pressing and cutting device (180) according to one of the preceding claims, characterized by , that the spring action of at least one press jaw is realized by the fact that the press jaw is made of a particularly elastically flexible material. [4] Pressing and cutting device (180), in particular according to one of the preceding claims, for a system (100) for converting a web-shaped starting material, which defines a web longitudinal direction (L) and extends between two longitudinal edges (6) opposite each other in the web width direction (B), in particular made of paper, cardboard or paperboard, into packaging bags (11) with a forming device (130) for continuously forming the web-shaped starting material into a material web with a V- or U-shaped cross-section and a receiving space extending in the web longitudinal direction (L) and bounded by opposing V- or U-legs of the material web, comprising a pair of press jaws (181) of two mutually associated press jaws (183, 185), at least one of which is movable relative to the other press jaw for pressing forward transverse edge sections of the V- or U-legs against each other, characterized by, that a cutting device is arranged on at least one press jaw in such a way and / or at least one press jaw is designed in such a way that the cutting device is released in particular continuously when the press jaws (183, 185) are pressed against each other to separate a packaging pocket (11) from the material web and is moved back in particular continuously when the press jaws (183, 185) are moved away from each other in relation to the associated press jaw. [5] Pressing and cutting device (180) according to claim 4, characterized by , that at least one press jaw comprises two parallel extending press jaw segments which are arranged at a distance from each other forming a gap in which the cutting device is arranged. [6] Pressing and cutting device (180) according to claim 5, characterized by, that the further press jaw comprises two press jaw segments, in particular identical to the at least one press jaw, which are arranged at a distance from each other forming a gap into which the cutting device can engage when pressing the press jaws (183, 185) against each other. [7] Pressing and cutting device (180) according to one of claims 4 to 6, characterized bya passive state in which the press jaws (183, 185) release the material web and the cutting device projects by at most 5%, in particular by at most 4%, at most 3% or at most 2% of its longitudinal extent in the direction of movement of the movable press jaw beyond a pressing surface of the associated press jaw facing the other press jaw, and / or a press end state in which the cutting device projects by at least 10%, in particular by at least 12.5%, at least 15% or at least 17.5% of its longitudinal extent in the direction of movement of the movable press jaw beyond the pressing surface. [8] Pressing and cutting device (180) according to one of claims 4 to 7, characterized by , that the cutting device is released by the fact that, when the press jaws (183, 185) are pressed against each other, the press jaw assigned to the cutting device is displaced by the opposite press jaw. [9] Pressing and cutting device (180), in particular according to one of the preceding claims, for a system (100) for converting a web-shaped starting material, which defines a web longitudinal direction (L) and extends between two longitudinal edges (6) opposite each other in the web width direction (B), in particular made of paper, cardboard or paperboard, into packaging bags (11) with a forming device (130) for continuously forming the web-shaped starting material into a material web with a V- or U-shaped cross-section and a receiving space extending in the web longitudinal direction (L) and bounded by opposite V- or U-legs of the material web, comprising a pair of press jaws (181) consisting of two mutually associated press jaws (183, 185),of which at least one press jaw is movable relative to the other press jaw for pressing against each other leading transverse edge sections of the V or U legs and for separating a packaging pocket (11) from the material web in the area of ​​the pressed transverse edge sections, , characterized by a gearbox assigned to at least one of the press jaws (183, 185) for providing a pressing force to the pair of press jaws (181). [10] Pressing and cutting device (180) according to one of the preceding claims, characterized by , that at least one movable press jaw is movable along a linear pressing and releasing direction. [11] Pressing and cutting device (180) according to claim 9 or 10, characterized by, that the transmission is designed to convert the mechanical work performed by a power source, such as a motor, in particular a rotary motor, into a particularly linear pressing and releasing motion direction of the at least one movable pressing jaw. [12] Pressing and cutting device (180) according to one of claims 9 to 11, characterized by that the gearbox has a non-linear power transmission function, wherein in particular the gearbox is designed to adjust the pressing force transmitted to the press jaw pair (181) depending on the operating state of the pressing and separating device (180). [13] Pressing and cutting device (180) according to one of claims 9 to 12, characterized by , that the transmission includes a linkage transmission, in particular with a double centrally acting push-pull crank, a toggle joint, a cam disc, several cams and / or a cam disc. [14] Pressing and cutting device (180) according to any one of claims 9 to 13, characterized by that the gearbox is coupled to a power source, such as a motor, in particular a rotary motor, via an intermediate gearbox, such as a worm, spur, planetary or bevel gear, for the particularly linear adjustment of the speed-torque ratio. [15] System (100) for converting a web-shaped starting material, which defines a web longitudinal direction (L) and extends between two longitudinal edges (6) opposite each other in the web width direction (B), in particular made of paper, cardboard or paperboard, into packaging bags (11), comprising a forming device (130) for continuously forming the web-shaped starting material into a material web with a V- or U-shaped cross-section and a receiving space extending in the web longitudinal direction (L) and bounded by opposing V- or U-legs of the material web, and a pressing and separating device (180) downstream of the forming device (130) designed according to one of the preceding claims for simultaneously pressing forward transverse edge sections of the V- or U-legs against each other and separating a packaging bag (11) from the material web in the area of ​​the pressed transverse edge sections. [16] Packaging bag manufacturing station comprising a system (100) according to claim 15 and a supply of web-shaped starting material (1) defining a web longitudinal direction (L) and extending between two longitudinal edges (6) opposite each other in the web width direction (B), in particular made of paper, cardboard or corrugated board, from which the system (100) can pull the starting material (1).

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