Separating device

Abstract

The invention relates to a device for cutting a backing web and a corresponding method, wherein the cutting device can cut a backing web into individual backings that can be guided under a fresh product. The cutting device has a knife device and a counter-cutting device, each having at least two cutting edges. Either the knife device and / or the counter-cutting devices are movable back and forth in two directions.

Description

[0001] The invention relates to a separating device, a device for feeding cut documents and a corresponding method according to the preambles of claims 1, 11 and 14.

[0002] During the production of fresh products, i.e. foodstuffs such as minced meat, burgers, patties, etc., paper, film, or similar materials are placed inside the packaging or as an intermediate layer between stacked products to prevent the products from sticking to one another, or to conveyor belts or the packaging itself. Moisture-absorbing materials, known as fleece, can also be used as underlays to bind excess moisture within the packaging. This prevents liquid from becoming visible inside the packaging, and it also prevents the inside of the packaging from fogging up, thus making the packaged food difficult to see.

[0003] These pads are supplied, for example, from a supply roll and then cut into individual pads. It has proven difficult to cut the pads continuously at high speed and feed them to the products. This is particularly difficult when the pads are fed to the products at a point where they are separated by two conveyor belts. To do this, the pad can be pushed far enough between the conveyor belts that a freshly produced product, such as a burger, can run onto the pad and take it with it without slowing down or being stopped. The pad may already be cut to the required length when it is taken over by the product.However, it is also possible, especially if the required length of the underlay is greater than the area from the front edge of the provided underlay to the next cutting point, for the underlay to be cut while the product is carrying it along, i.e., while the product is in motion. In this case, the underlay can be cut to the desired length while the underlay is being fed, while the feed speed is being reduced, or during a brief stop of the feed. The product is not stopped during this process, but this does result in a brief and slight relative movement between the product and the underlay.

[0004] Here, it is difficult to cut through the backing sheets at high speed, as when using a knife, it always has to be moved back before a new cut can be made. Rotating knife rollers with counter-blades are already known, for example, from CN 207189772. Here, the paper passes the cutting point essentially tangentially to the rotating cutting knife. The problem can arise here that, especially with harder materials, the cutting pressure is insufficient to cut the material quickly and reliably.

[0005] The current solutions are inflexible and too slow to be able to quickly and reliably provide the products manufactured with high portioning performance with the required length and with high positioning accuracy.

[0006] Based on this, the present invention is based on the object of providing a separating device and a method which enable a reliable cutting of a substrate web into individual substrates at high speed.

[0007] According to the invention, this object is achieved by the features of claims 1, 11 and 14.

[0008] According to the present invention, a separating device for cutting a backing web into individual backings that can be guided under a fresh product comprises a knife device and a counter-cutting device. The knife device and the counter-cutting device each have at least two cutting edges, wherein the knife device and / or the counter-cutting devices can be moved back and forth in two directions. This means that the knife device has at least one knife with two cutting edges that are spaced apart in the direction of movement. The present invention has the advantage that a very high portioning output is possible because the cutting edges can be used alternately and, for example, the knife device does not have to be moved completely back again, as in the prior art, in order to then make a new cut with the forward movement.The knife device and the counter-cutting device are moved relative to each other in such a way that after a cut the feed path of the backing web is released again without the knife device and / or the counter-cutting device having to be moved back.

[0009] The knife device and the counter-cutting device are designed and arranged such that a cut in the backing web can be produced when the knife device is moved forward and / or the counter-cutting device is moved backward, or the knife device is moved backward and / or the counter-cutting device is moved forward. This means that either the knife device is moved back and forth, or the counter-cutting device, or both devices are moved relative to one another. The cutting edges of the knife device and the counter-cutting device can thus move toward one another and shear the backing web.

[0010] Cutting by shearing is particularly advantageous because, in contrast to the state of the art, no great contact pressure is required and a safer and easier cutting is possible.

[0011] The backing web can be cut with the respective first cutting edge during the forward movement of the knife device and the backward movement of the counter-cutting device, and with the respective second cutting edge during the backward movement of the knife device and the forward movement of the counter-cutting device.

[0012] This means that during the reciprocating movement, the first and second cutting edges are used alternately. The first cutting edge of the knife unit and the counter-cutting unit is the front cutting edge when viewed in the forward direction (e.g., in the conveying direction of the fresh products), and the second cutting edge is the rear cutting edge when viewed in the forward direction for the section of the substrate to be cut off.

[0013] According to a preferred embodiment, the counter-cutting device has a through-opening with an inlet end at which the backing web can be inserted and an outlet end at which the backing web can exit or be pushed out, wherein at the exit end the cutting edges are arranged on opposite sides of the through-opening. The through-opening has the advantage that the backing web can be guided in the through-opening and thus stabilized and if, for example, a knife of the knife device moves over the through-opening and / or the through-opening moves under the knife, the through-opening is at least exposed again after a cut to such an extent that the backing web can be pushed through the through-opening. The through-opening therefore has two functions: guiding the backing web and cutting using the respective cutting edge.

[0014] It is particularly advantageous if the counter-cutting device is movable back and forth and the counter-cutting device is arranged in front of the knife device in the feed direction of the backing web, because this provides more freedom of movement.

[0015] It is particularly advantageous if the through opening tapers from the infeed end to the outlet end, in particular if it tapers conically. This means that the through opening has a larger dimension at the infeed end, so that the backing web can be fed in easily. With this solution, after the backing material has been cut off, the feed path is immediately free again due to the smaller dimension of the through opening at the outlet end, and the backing material required for the next portion can be safely guided and immediately fed in again. A conical shape of the opposite side walls of the through opening, at least at the outlet end, also enables, for example, an improved formation of the cutting edges. The distance between the cutting edges is advantageously in a range of 0.5 mm to 10 mm, in particular 1 mm to 5 mm.

[0016] The knife device can therefore have one or more individual knives, with the individual knives each having two cutting edges. The individual knives are then arranged one behind the other in the direction of movement. The cutting speed can therefore be increased even further by arranging several individual knives because, for example, when the knife device moves forwards, the backing web can be cut in rapid succession by the second cutting edges of the respective individual knives of the knife device, and when moving backwards, the backing web can be cut in rapid succession by the first cutting edges of the knife device. It is also advantageous that an opening area is provided between the individual knives so that the backing web can be guided through the knife device. If only one individual knife is provided, the backing web can be guided laterally past the knife.

[0017] It is thus possible that during the forward movement of the individual knives of the knife device and / or the backward movement of the counter-cutting device, the backing web can be cut one after the other by the individual knives from a respective second cutting edge of the knife device and a second cutting edge of the counter-cutting device and during the backward movement of the individual knives of the knife device and / or the forward movement of the counter-cutting device, the backing web can be cut one after the other by the individual knives from a respective first cutting edge of the knife device and first cutting edge of the counter-cutting device.

[0018] Advantageously, the individual blades are arranged so that they can move linearly or rotate. The counter-cutting device can also be arranged so that it can move linearly or rotate.

[0019] If the individual knives are arranged to rotate, it is advantageous if the counter-cutting device is arranged to be stationary or rotating (i.e. the knife device rotates, for example, about the same axis as the counter-cutting device) in such a way that the cutting edges of the knife device and counter-cutting device can move past each other and shear off the backing web.

[0020] According to a preferred embodiment, the cutting edges of the knife device and the cutting edges of the counter-cutting device do not run parallel to each other, but rather at an angle of 0.5° to 3°. This positively influences the cutting result. Advantageously, the cutting edges of the counter-cutting device run at an angle of 1° to 2° to the cutting edges of the knife device.

[0021] The invention also relates to a device for feeding cut supports underneath a fresh product, comprising a separating device according to at least one of claims 1 to 10 and two transport devices, in particular conveyor belts, for the fresh product and a conveyor device for feeding the support web to the separating device. The separating device is arranged such that the support web can be guided between the transport devices and the fresh product can be applied to the support. For this purpose, for example, the support web is pushed between the transport devices until a freshly produced product, e.g. a burger, runs onto the support and carries it along. The support can already be cut to the required length when it is taken over by the product. However, it is also possible for the support to be cut while the support is being carried along by the product.

[0022] It is possible for the device to have a control device that adjusts the feed path depending on the position of a counter-cutting device (in particular an angle of rotation of a moving, in particular rotating counter-cutting device, in particular a shaft position of the counter-cutting device). The feed path is understood to be the distance traveled by the free front end of the backing web after a cut to the provision point B on the downstream transport device, i.e. the path between the cutting edges and a provision point B on the downstream transport device, at which the fresh product runs onto the backing web. If the counter-cutting device moves back and forth, in particular rotates, this results in a different feed path for the backing web to the provision position.The control system can compensate for the different feed paths by adjusting the feed path that the support web travels to the delivery point. For this purpose, for example, the speed at which the support web is conveyed by the conveyor can be adjusted accordingly. This means, for example, that over a longer path, the conveyor can convey the support web somewhat further or somewhat faster than over a shorter path.

[0023] The control device can also adjust the timing of the cut accordingly to obtain the correct length of the base.

[0024] The transport device advantageously has opposing transport rollers, at least one of which is driven. One of the transport rollers can have a non-cylindrical, e.g., concave, outer contour, and the opposite transport direction can have a correspondingly complementary non-cylindrical, e.g., convex, outer contour. This allows the base web, e.g., a paper or film web, to be slightly bent, i.e., kinked, which improves rigidity and thus leads to increased stability, improved feed, and thus greater process reliability.

[0025] In a method according to the present invention, both the knife device and the counter-cutting device each have at least two cutting edges, wherein the backing web is cut when the knife device moves in the forward direction and / or the counter-cutting device in the reverse direction and when the knife device is moved in the reverse direction and / or the counter-cutting device in the forward direction, such that in order to produce a cut, a cutting edge of the knife device and a cutting edge of the counter-cutting device are moved towards one another and thus shear off the backing web.

[0026] The device comprises a control device which controls the conveyor device for feeding the support web, the transport devices for the fresh product and the separating device and adapts the functions, in particular the speeds (or timing of the separating device) to one another.

[0027] The supply of fresh products can be irregular due to production reasons. Therefore, it is advantageous if the incoming fresh product, especially the incoming fresh product portion, is detected by a sensor. The control unit controls, for example, the conveyors for feeding the backing web and the separating device depending on the position detected by the sensor. This ensures that, even in the event of irregular supply of fresh product portions, the backing is always fed in at the correct time and in the correct length.

[0028] The knife device and / or the counter-cutting device can move continuously back and forth in two directions. The feed and cutting process can also occur continuously. This results in a continuous, particularly essentially continuous, process, although the transport speed of the backing web can be constant or periodically changed, or even temporarily reduced or stopped.

[0029] After a cut, the knife device and / or the counter-cutting device can move further in such a way that the feed path for the backing web is free again without the knife device and / or the counter-cutting device having to be moved back.

[0030] The present invention is explained in more detail with reference to the following figures. <h2 style=";text-align:left;direction:ltr">Figure 1shows a roughly schematic embodiment of a device for feeding cut documents. <h2 style=";text-align:left;direction:ltr"> Figure 2a shows schematically a separating device according to a first embodiment. <h2 style=";text-align:left;direction:ltr"> Figure 2b shows a roughly schematic view of a separating device according to a further embodiment. <h2 style=";text-align:left;direction:ltr"> Figur 2c shows a roughly schematic view of a separating device according to a further embodiment. <h2 style=";text-align:left;direction:ltr"> Figure 3a shows a roughly schematic view of a separating device according to a further embodiment. <h2 style=";text-align:left;direction:ltr"> Figure 3b shows a roughly schematic view of a separating device according to a further embodiment. <h2 style=";text-align:left;direction:ltr"> Figure 3c shows a roughly schematic view of a separating device according to a further embodiment. <h2 style=";text-align:left;direction:ltr"> Figure 4 shows a rough schematic of the cutting edges of the knife device and the counter-cutting device in cross section. <h2 style=";text-align:left;direction:ltr"> Figure 5 shows roughly schematically another embodiment according to the present invention. <h2 style=";text-align:left;direction:ltr"> Figure 6a,beach show a cross section through transport rollers for the support web according to a preferred embodiment.

[0031] <h2 style=";text-align:left;direction:ltr"> Figure 1 shows a roughly schematic view of a device 10 for feeding cut substrates 2b under a fresh product 3. In this application, fresh product is understood to mean, for example, minced meat, burgers, patties, etc., but also meatless products such as pieces of cheese. These fresh products can, as in <h2 style=";text-align:left;direction:ltr"> Figure 1 shown, are fed in portions. A base, such as paper, a plastic film, or a liquid-absorbent base, such as a fleece, is placed beneath the product.

[0032] The device 10 comprises a first transport device 12, here a conveyor belt, via which the already portioned fresh products 3 are transported in the transport direction T. From the first transport device 12, the fresh products are transferred to the second, spaced-apart transport device 13. In the transport direction T, downstream of the second transport device 13, which here is also designed as a circulating conveyor belt, a further transport device 14 can be arranged, which here is located somewhat lower, for example, and into which the product can be introduced together with the base into a packaging, here the container 19.

[0033] The device further comprises a conveyor device 15 for feeding the backing web 2a to the separating device 1. The conveyor device 15 comprises a supply roll 20 onto which the backing web 2a is wound. The backing web can be conveyed, for example, via conveyor rollers 17a, 17b, at least one of which is driven and which conveys the backing web in the direction of the separating device. The supply roll 20 can be driven and decoupled from the transport rollers 17a, 17b by a loop formed by the backing web. The backing web 2a can be held under tension in this loop by a so-called dancer roller 21, which is movably mounted. The dancer roller 21 also serves to regulate the feed from the supply roll. As is generally known from the prior art, the backing web is unwound from the supply roll depending on the position of the dancer roller.

[0034] The support web is preferably fed to the fresh products at a separation point between the two conveyor belts 12 and 13. The feed occurs in a continuous flow, i.e., while the fresh products 3 pass the separation point in the transport direction T. For this purpose, the support web 2a can be pushed between the conveyor belts 12, 13 far enough for a fed fresh product 3, for example, a burger, to run onto the support and carry it along. The product can, for example, also run onto the support without reducing its speed or being stopped.

[0035] The underlay 2b can already be cut to the required length when it is picked up by the fresh product 3. However, it is also possible, for example, if the underlay is to protrude beyond the rear of the fresh product, for the underlay web 2a to be cut while the underlay is already being picked up by the product, for example, during the conveyor belt. The underlay web can be cut to the desired length while it is being transported (the feed speed can also be reduced) or during a brief stop in the conveyor belt.

[0036] The separating device 1 for cutting the backing web 2a is arranged in the <h2 style=";text-align:left;direction:ltr"> Figure 2aThe cutting device 1 has a knife device 4 and a counter-cutting device 5. The knife device 4 here has a single knife which has two spaced-apart cutting edges 7a and 7b at the end facing the counter-cutting device 5. For this purpose, the single knife can, for example, have opposing oblique sections in the lower region such that the knife width b widens in the direction of the counter-cutting device 5, so that a pointed cutting edge can be formed. The cutting edges are, for example, 1 mm to 10 mm apart.

[0037] The counter-cutting device 5 also has two spaced-apart cutting edges 8a and 8b on the side facing the knife device 4. The cutting edges 7a,b,8a,b have at least a length corresponding to the width of the backing web 2a to be cut.

[0038] Here, a through-opening 6 is formed in the counter-cutting device 5, with an inlet end 9, at which the backing web 2a can be inserted, and an outlet end 11, at which the backing web can exit, wherein the cutting edges 8a, 8b are arranged opposite one another at the exit end 11. The through-opening 6 can taper conically from the feed end 9 to the exit end 11, in particular at least in the region of the exit end, wherein the distance between the cutting edges is in a range of 1 mm to 10 mm. The through-opening 6 guides the backing web 2a. The conical design, on the one hand, improves guidance towards the exit end, so that the exit position lies in a defined area, and on the other hand, the oblique course of the side walls of the counter-cutting device 5 makes it easy to create a pointed cutting edge.

[0039] According to the present invention, either the knife device 4 and / or the counter cutting device 5 can be arranged in two directions as indicated by the arrow in <h2 style=";text-align:left;direction:ltr"> Figure 2a shown, can be moved back and forth. <h2 style=";text-align:left;direction:ltr"> Figure 2aIn the exemplary embodiment shown, for example, the counter-cutting device 5 can be arranged to be movable back and forth. For this purpose, a drive (not shown), for example a linear drive of any kind, preferably a servo drive, can be provided. The knife device 4 is then arranged, for example, fixedly between the transport devices 12 and 13. It preferably extends into an area of ​​the opposite rollers of the transport devices 12 and 13. If the counter-cutting device 5 is now moved in the reverse direction R, that is, here opposite to the transport direction T, under the knife device 4, the second cutting edge 8b moves towards the second cutting edge 7b, here linearly, and shears the backing web 2a, as can be seen from the left illustration of the <h2 style=";text-align:left;direction:ltr"> Fig. 2aThe counter-cutting device 5 moves further until the through-opening 6 at the outlet end 11 is again at least partially exposed, such that the backing web 2a is transported further, that is, is pushed upwards by the transport device 15, as can be seen from the middle illustration in <h2 style=";text-align:left;direction:ltr"> Fig. 2a Then the counter-cutting device 5 can be moved in the forward direction again, that is, here along the transport direction T, in such a way that the cutting edges 7a and 8a move towards each other and finally shear the support web 2a into individual supports 2b, as can be seen from the right-hand illustration of the <h2 style=";text-align:left;direction:ltr"> Fig. 2aThe counter-cutting device 5 is then moved further accordingly until the area at the exit end 11 of the through-opening is exposed again, such that the backing web can be pushed upwards, as shown in the middle illustration, in order to then be severed again by the edges 7b and 8b.

[0040] Because the through opening 6 tapers from the feed end 9 to the outlet end 11, the backing sheet 2a can be easily inserted from the inlet side and, at the same time, the area at the outlet end 11 can be quickly exposed again.

[0041] <h2 style=";text-align:left;direction:ltr"> Figure 2b shows another embodiment that is similar to <h2 style=";text-align:left;direction:ltr"> Figure 2ashown embodiment, but here the counter-cutting device 5 is stationary and the knife device 4 is arranged to be linearly movable. As can be seen from the lower left illustration, starting from the upper illustration the knife device 4 moves in the forward direction, i.e. in the transport direction T such that the cutting edges 7b and 8b move towards one another and can shear off the backing web 2a. In the middle illustration the knife device 4 has now already moved far enough in the transport direction T that the area at the outlet end 11 of the through opening 6 is exposed again and further advancement of the backing web 2a is possible, as can be seen from the middle illustration.

[0042] Now the knife device 4 begins to move in the reverse direction, such that the first cutting edges 7a, 8a move toward each other and cut the backing web 2a. As shown in the right-hand illustration, the knife can then continue to move in the reverse direction R until the area 11 is exposed again and the backing web 2a can be advanced further. The knife device 4 can then be moved again in the forward direction, here in the transport direction T, such that the cutting edges 7b and 8b move toward each other again.

[0043] This means that, as in the context of the <h2 style=";text-align:left;direction:ltr"> Figure 2a and bAs described above, the backing web 2a can be cut continuously into individual layers 2b, with the knife device 4 and / or the counter-cutting device 5 continuously moving back and forth in two directions T, R. It is also possible for both devices, i.e. the knife device 4 and the counter-cutting device 5, to move back and forth and move towards each other for cutting. It is particularly advantageous if only the counter-cutting device is arranged to be movable, since there is more space for free movement in a lower area below the transport devices 12, 13 than between the rollers of the transport devices 12, 13.

[0044] <h2 style=";text-align:left;direction:ltr"> Figur 2c essentially corresponds to the <h2 style=";text-align:left;direction:ltr"> Figure 2a and 2bshown embodiments, with the exception that the knife device 4 here has several individual knives, each with two cutting edges 7a, b. Opening areas are arranged between the individual knives, such that the backing web 2a can be pushed through these areas before the backing web 2a is cut by the subsequent individual knife viewed in the direction of movement of the individual knives. This means that, as shown by the arrow, the individual knives are moved linearly over the counter-cutting device and its cutting edges in order to accomplish several cuts in rapid succession. In principle, in this embodiment, as in connection with <h2 style=";text-align:left;direction:ltr"> Figure 2bAs shown, the counter-cutting device can be arranged to be linearly movable and the knife device 4 can be arranged to be stationary, or both the knife device and the counter-cutting device can be arranged to be movable back and forth, such that the cutting edges 7a, 8a and 7b, 8b can move toward one another and shear the backing web 2a. The number of knives can be up to 6 knives, for example.

[0045] <h2 style=";text-align:left;direction:ltr"> Figure 3a shows a further embodiment according to the present invention. The <h2 style=";text-align:left;direction:ltr"> Figure 3a The embodiment shown essentially corresponds to the one shown in <h2 style=";text-align:left;direction:ltr"> Figure 2a and 2bshown embodiment with the exception that here the counter-cutting device 5 is not arranged to be linearly movable, but is arranged to be rotatable about a central axis M in two directions R, V. Thus, the through-opening 6 with the cutting edges 8a and 8b can be moved back and forth under the stationary knife device 4 in such a way that during the rotary movement in direction R the cutting edges 8b and 7b move towards one another and shear off the backing web 2a, and during movement in direction V the cutting edges 8a and 7a move towards one another and shear off the backing web 2a. The counter-cutting device can have a cylindrical outer contour and the knife device can have an essentially complementary shape in the facing region in such a way that the two devices 4, 5 can slide past one another.As already described in connection with other embodiments, the counter-cutting device 5 is rotated further below the knife device 4 so that the through opening 6 at the outlet end 11 is exposed again and a feed of the backing web out of the counter-cutting device 5 is possible.

[0046] <h2 style=";text-align:left;direction:ltr"> Figure 3b essentially corresponds to the <h2 style=";text-align:left;direction:ltr"> Figure 3a shown embodiment, wherein here the knife device 4 is designed such that at least one individual knife is arranged to rotate about the central axis M, while the counter-cutting device is stationary. Here, the individual knife moves back and forth between the cutting edges 7a and 7b across the through opening in the directions, here rotational directions R and V, and in doing so cuts the backing web 2a, as previously explained.

[0047] <h2 style=";text-align:left;direction:ltr"> Figure 3c shows a further embodiment which is similar to that in <h2 style=";text-align:left;direction:ltr"> Figure 3bshown embodiment, wherein here the knife device comprises a plurality of individual knives, which are also arranged to rotate about the axis M and can be moved back and forth one after the other across the through-opening 6. The counter-cutting device 5 can be arranged stationary. Here, too, a corresponding opening is provided between the individual knives, through which the support web 2a can move.

[0048] In <h2 style=";text-align:left;direction:ltr"> Figure 3b and c However, it is also possible that both the knife device 4 and the counter-cutting device 5 are arranged to be rotatable back and forth, such that the cutting edges can move towards each other.

[0049] <h2 style=";text-align:left;direction:ltr"> Figure 5 shows an embodiment that essentially corresponds to the <h2 style=";text-align:left;direction:ltr"> Figure 3ashown embodiment. The knife device 4 is pulled so far upwards between the transport devices 12 and 13 that it can serve as a guide. As shown by the dashed lines, the counter-cutting device 5 can be moved back and forth between the two outer positions. Due to the different positions, feed paths of different lengths arise for the support web, in particular up to the preparation position B on the transport device 13, at which the fresh product 3 can lie on the support web. The necessary correction of the feed path is carried out, for example, by controlling the feed rollers via software depending on the corresponding angle of rotation or the position of the counter-cutting device, i.e. the feed path in the position shown in dashed lines can be smaller than the feed path in the rotation position, which is shown in solid lines.

[0050] A different feed path can also occur with a counter-cutting device that moves linearly back and forth and can then also be corrected accordingly.

[0051] <h2 style=";text-align:left;direction:ltr"> Figure 4 shows a roughly schematic section through the separating device, for example along the line II. in <h2 style=";text-align:left;direction:ltr"> Figure 2b Here, it can be seen that the cutting edges 7a, 7b do not run parallel to the cutting edges 8b and 8a, but at an angle of 0.5° to 3°, preferably 1° to 2°. This further increases operational reliability.

[0052] <h2 style=";text-align:left;direction:ltr"> Figure 6a,b show a cross section through the transport rollers 17a, 17b, as they are shown for example in <h2 style=";text-align:left;direction:ltr"> Figure 1are shown. To ensure that the support web has a certain rigidity, the conveyor roller 17a can have a non-cylindrical, for example, convex, outer contour, and the conveyor roller 17b can have a complementary non-cylindrical, for example, concave, outer contour. This gives the support web a corresponding shape and thus gives it even greater stability, so that the feed of the support web functions even better.

[0053] In the method according to the invention, the backing web 2a is fed via the conveyor device 15 and guided through the through opening 6 of the counter-cutting device. The backing web 2a is cut when the knife device moves in the forward direction V and / or the counter-cutting device moves in the reverse direction R or vice versa. To produce a cut, for example, the front cutting edge 7a in the direction of movement moves towards the corresponding front cutting edge 8a of the counter-cutting edge 5 and shears off the backing web 2b. The knife device 4 or the counter-cutting device moves continuously back and forth in two directions so that a continuous cutting process can be realized. After the cut, the knife device 4 and / or the counter-cutting device 5 moves further in such a way that the feed for the backing web 2a is free again, i.e. the through opening 6 in the exit area 11 is free.Then the backing web 2a can be fed forward again and the backing web 2a can be cut.

[0054] The support web 2a is pushed between the two transport devices 12 and 13 to an upper area, whereby the fresh product 3 is pushed onto the support web 2a, 2b and carries it along. At this point, the support web 2a can either already be cut or, particularly if the support web is to protrude rearward under the product, it can only be cut after the fresh product 3 has already arrived.

[0055] The device comprises a control device which controls the conveyor device 15 for feeding the support web and the transport devices 12, 13 for the fresh product as well as the separating device 1 and adapts the functions, in particular the speeds, to one another.

[0056] In the embodiments shown above, the supply of fresh products can be irregular due to production reasons. It is therefore advantageous if the incoming fresh product, in particular the incoming fresh product portion, is detected by means of a sensor 30 (e.g. an optical sensor). The sensor is arranged, for example, in the area of ​​the first transport device, here conveyor belt 12, or in an area between the transport devices 12, 13. The sensor can, for example, detect when the fresh product portion is running in, i.e. detect the front edge and forward it to the control device in such a way that the control device knows the position of the fresh product. The control device then controls the conveyor device 15 for feeding the backing web and the separating device 1 depending on the position detected by sensor 30.This ensures that, even in the event of irregular feeds of fresh product portions, the trays are always fed at the correct time and in the correct length, meaning that a portion is always correctly positioned on the tray. It is also possible to adjust the speed of the conveyors 12 and 13 accordingly.

[0057] According to a further embodiment, the length of the fresh product portion can also be determined via the sensor 30, so that if the lengths of the portions fluctuate, the length of the base can be adjusted accordingly, thus saving material.

[0058] The knife device and / or the counter-cutting device can move continuously back and forth in two directions. The feed and cutting process can also be continuous. This results in a continuous, particularly essentially continuous, process, although the transport speed of the backing web can be constant or periodically changed, or even temporarily reduced or stopped.

Claims

1. Separating device (1) for cutting a support web (2a) into individual supports (2b) which can be guided under a fresh product (3), with a knife device (4) and a counter-cutting device (5), characterized in that both the knife device (4) and the counter-cutting device (5) each have at least two cutting edges (7a,b, 8a,b) and either the knife device (4) and / or the counter-cutting device (5) can be moved back and forth in two directions.

2. Separating device according to claim 1, characterized in thatthe knife device (4) and the counter-cutting device (5) are designed and arranged in such a way that a cut of the backing web can be produced when the knife device (4) is moved in the forward direction and / or the counter-cutting device (5) is moved in the reverse direction and the knife device is moved in the reverse direction and / or the counter-cutting device is moved in the forward direction, wherein a cutting edge (7a, b) of the knife device (4) and a cutting edge (8a, b) of the counter-cutting device (5) can move towards one another and shear off the backing web (2a).

3. Separating device according to at least one of claims 1 or 2, characterized in thatthe backing web (2a) can be cut with the respective first cutting edge (7a, 8a) during the forward movement of the knife device (4) and / or the backward movement of the counter-cutting device (5) and by the respective second cutting edge (7b, 8b) during the backward movement of the knife device (4) and / or the forward movement of the counter-cutting device (5).

4. Separating device according to at least one of claims 1 to 3, characterized in that the counter-cutting device (5) has a through-opening (6) with an inlet end (9) at which the backing web (2a) can be inserted and an outlet end (11) at which the backing web (2a) can exit, wherein the cutting edges (8a,b) are arranged opposite one another at the outlet end (11).

5. Separating device according to at least one of claims 1 to 4, characterized in thatthe through-opening (6) tapers from the feed end (9) to the outlet end (11), in particular at least in sections conically.

6. Separating device according to at least one of claims 1 to 5, characterized in that the knife device (4) has one or more individual knives, each with two cutting edges (7a, 7b), wherein the individual knives are arranged one behind the other in the direction of movement and preferably an opening is arranged between the individual knives through which the backing web can be guided.

7. Separating device according to claim 6, characterized in thatduring the forward movement of the individual knives of the knife device (4) and / or the backward movement of the counter-cutting device (5), the backing web (2a) can be cut one after the other by the individual knives, by a respective second cutting edge (7b) of the knife device (4) and a second cutting edge (8b) of the counter-cutting device (5), and during the backward movement of the individual knives of the knife device (4) and / or the forward movement of the counter-cutting device (5), the backing web (2a) can be cut one after the other by the individual knives (4) by a respective first cutting edge (7a) of the knife device (4) and the first cutting edge (8a) of the counter-cutting device (5).

8. Separating device according to at least claim 6, characterized in that the individual knives are arranged to be linearly movable or that the individual knives are arranged to be rotating.

9. Separating device according to at least one of claims 1 to 8, characterized in thatthe counter-cutting device (5) is arranged to be linearly movable or that the counter-cutting device (5) is arranged to be rotating.

10. Separating device according to at least one of claims 1 to 9, ​ the cutting edges (7a, 7b) of the knife device (4) and the cutting edges (8a,b) of the counter-cutting device (5) do not run parallel, but in particular at an angle of 0.5° to 3° to each other.

11. Device (10) for feeding cut supports (2b) under a fresh product (3), comprising a separating device (1) according to at least one of claims 1 to 10, two transport devices (12, 13) for the fresh product (3), and a conveyor device (15) for feeding the support web (2a) to the separating device (1), wherein the separating device (1) is arranged such that the support web (2a) can be guided between the transport devices (12, 13) and the fresh product (3) can be applied to the support (2a, 2b).

12. Device for feeding cut documents according to claim 11, ​ the device comprises a control device (16) which adjusts the feed path of the support web to a delivery point (B), at which the fresh product runs onto the support, as a function of a position, in particular the angle of rotation of the moving, in particular rotating, counter-cutting device (5). ​13. Device according to claim 11 or 12, ​ the transport device (15) has opposing transport rollers (17a, 17b), wherein one transport roller (17a) has a non-cylindrical outer contour and the opposite transport roller (17b) has a complementary non-cylindrical outer contour.

14. Method for cutting a substrate web with a knife device (4) and a counter-cutting device (5), in particular with a cutting device according to at least one of claims 1-10, ​both the knife device (4) and the counter-cutting device (5) each have at least two cutting edges (7a,b, 8a,b), wherein the backing web (2a) is cut when the knife device (4) moves in the forward direction and / or the counter-cutting device (5) moves in the reverse direction and when the knife device is moved in the reverse direction and / or the counter-cutting device moves in the forward direction, such that to produce a cut, a cutting edge (7a,b) of the knife device (4) and a cutting edge (8a,b) of the counter-cutting device (5) move towards each other and shear off the backing web (2a).

15. Method according to claim 14, ​ the backing web (2a) is cut into individual backings (2b), whereby the knife device (4) and / or the counter-cutting device (5) move back and forth in two directions.

16. Method according to at least one of claims 14 or 15, ​after a cut, the knife device (4) and / or the counter-cutting device (4) continue to move in such a way that the feed path for the backing web (2a) is free again without the knife device and / or the counter-cutting device having to be moved back.

17. Device according to claim 11, ​ the device comprises a control device which controls the conveyor device (15) for feeding the support web and the transport devices (12, 13) for the fresh product as well as the separating device (1) and the device further comprises a sensor (30) for detecting the position of the incoming fresh product, in particular in such a way that the conveyor devices for feeding the support web (15) and the separating device (1) are controlled as a function of the position detected by means of the sensor (30).

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