Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
  • B65B31/04—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
  • B65B31/046—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied the nozzles co-operating, or being combined, with a device for opening or closing the container or wrapper
  • B65B31/047—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied the nozzles co-operating, or being combined, with a device for opening or closing the container or wrapper the nozzles co-operating with a check valve in the opening of the container or wrapper
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B25/00—Packaging other articles presenting special problems
  • B65B25/001—Packaging other articles presenting special problems of foodstuffs, combined with their conservation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
  • B65B31/04—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
  • B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
  • B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
  • B65B53/06—Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
  • B65B53/063—Tunnels
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
  • B65D75/002—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers in shrink films
  • B65D75/004—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers in shrink films with auxiliary packaging elements, e.g. protective pads or frames, trays

Definitions

• the invention relates to a method for packaging an object in a film or with a film, wherein the object lies on a carrier, and this carrier and the object are then wrapped in the film. Furthermore, the invention relates to the use of a so-called barrier film for packaging an object on a carrier according to this method. Finally, the invention also relates to a device with which the inventive method can be carried out.
• a multi-layer film is then glued or welded onto this edge for sealing.
• this film is designed in such a way that it does not allow germs, bacteria, or excessive oxygen to penetrate from the outside to the inside of the food to be packaged.
• some of these films are relatively thick to ensure that the aforementioned type of connection to the edge of the carrier is permanent and stable.
• the disadvantage of this multi-layer construction is that the material is not recyclable.
• a lid can be made of LDPE/EVOH/PP with a thickness of 55 ⁇ m, and a carrier can be made of PET or LDPE.
• shrink films also known as barrier films. These can also be used for packaging food products lying on carriers. After wrapping or sealing a package, they can be thermally shrunk in the usual way.
• the invention is based on the object of creating a method, a corresponding use and a corresponding device mentioned above, with which problems of the prior art can be solved and in particular it is possible to store foodstuffs as objects on a carrier safely, stably and as germ-free as possible or as to be able to package well, whereby the packaging should preferably be as completely recyclable as possible, and a carrier should possibly be compostable.
• the method serves to package an object in a film, wherein the object is arranged on a carrier. It is also possible for several, in particular similar or identical, objects to be packaged on a single carrier. Preferably, however, it is a single carrier in a single film package.
• the film is an aforementioned barrier film, preferably an EVOH film, optionally also a multilayer film with a layer of EVOH film, advantageously as a middle layer between two other film layers. It is thermally shrinkable and difficult or impossible for bacteria and germs to penetrate. Likewise, it can be virtually impervious to atmospheric gases such as oxygen, carbon dioxide, or the like.
• the packaging method comprises the following steps.
• a carrier is provided on which at least one of the aforementioned objects is located.
• the carrier projects laterally beyond the object, at least when viewed from above.
• the carrier can also be higher than the object, i.e., project beyond it, although this is not mandatory.
• the carrier can be adapted to the object or objects to be packaged, whereby it can also be smaller or the same size.
• the size of the carrier should deviate from the size of the object by a maximum of 10% in the contact area.
• the carrier is larger or projects just beyond the object.
• step B the carrier with the object on it is completely wrapped or wrapped in the barrier film, meaning it is completely enclosed in the film.
• the film may still be open in at least one place or on one side of the carrier. This is, on the one hand, an intermediate stage during packaging anyway. On the other hand, it can be used because there are then several possibilities to seal the film or the film bag created and formed by it with the carrier and object inside.
• the film bag is then generally produced or sealed.
• a first option for sealing the barrier film around the carrier with the object on it is to create a vacuum in the film bag thus formed. This can be achieved in several ways, which are explained in more detail below.
• the vacuum serves to ensure that the film bag adapts somewhat, largely, or completely to the carrier and the object on it. Furthermore, it helps to shrink the barrier film or film bag more effectively, which is explained in more detail below.
• the film bag is sealed with a vacuum inside it, whereby the vacuum can advantageously be between 0.1 bar and 0.5 bar.
• a complete closure of the barrier film around the carrier with the object thereon to form a film bag can be provided, with a pressure relief valve being attached to the finished film bag.
• a pressure relief valve can be designed in a similar way to that known, for example, from packaging for coffee beans or the like. It can advantageously be attached to an upper side of the film bag, particularly advantageously offset to one side or attached such that it is not located at the highest point of the packaging or film bag due to the packaged object. This pressure relief valve also serves for the subsequent thermal shrinkage.
• a vent hole can be created or present in the film bag formed from sealed barrier film. This can be done, for example, by simple perforation.
• the film bag formed in this way can release excess pressure and heated air from the film bag through this at least one vent hole during the subsequent step of thermally shrinking the film bag.
• the vent hole is hermetically sealed again, for example by means of a patch or an adhesive label or the like, which can consist of barrier film in order to retain the desired advantageous properties in this area as well, or can consist of another material or another film.
• the film bag is sealed or the barrier film forms the film bag when closing by placing at least two layers of the barrier film on top of each other and joining them by thermal welding, i.e. the film bag is thermally welded This can generally be done in a known manner, as explained in more detail below.
• step F the barrier film or film bag is heated to shrink the barrier film through thermal action.
• This causes the film bag formed by the film bag to fit tightly against the carrier with the object on it. This results in a more visually appealing, mechanically easier to handle and grasp package with the carrier and object inside, since the barrier film, stretched over or onto the carrier, further stabilizes it. This results in a fundamentally highly practical packaging.
• any air trapped in the film bag will generally expand due to the heating. If a negative pressure or sufficient negative pressure is created in the film bag as per step C), this negative pressure atmosphere will not expand significantly even upon heating during thermal shrinkage. At least, this expansion is not so significant that it would disrupt or impair the thermal shrinkage process itself.
• the carrier with the at least one object on it is tightly and tightly wrapped in the film bag, preferably under tension.
• step D the pressure relief valve serves to release the non-pressurized air in the film bag, which expands due to heating, to the outside. Since the pressure relief valve is a one-way valve, no ambient air is drawn in during cooling, allowing the barrier film to shrink very effectively, and the result is packaging in a thermally shrunk film bag, just as in step C). The pressure relief valve simply remains attached to the film bag.
• the at least one vent hole serves, similar to the pressure relief valve, to equalize or release the excess pressure generated due to the heating of the air in the film bag.
• the vent hole is closed or glued or taped. This prevents gases, bacteria, germs, etc., from entering through this vent hole. Furthermore, by closing it before complete cooling, a negative pressure can also be achieved, albeit a relatively small or weak negative pressure.
• step C), step D) or step E) each serve to reduce or prevent thermal shrinkage of the barrier film with temperature-induced expansion of air or gases in the film bag.
• gas and/or air can be forced out of the film bag before it is completely closed, either partially or largely, for example 10% to 40% or even up to 60%.
• This can preferably be done by applying pressure to the film bag from one side, in particular from above. This is particularly advantageous if it is done over a large area and is yielding or flexible, so that excess air or gas can be forced out of the film bag or the bag is slightly flattened. The effect is similar to that when suction is drawn out of the film bag shortly before it is completely closed.
• the sealed film bag then expands to a lesser extent or not at all due to the air or gas it contains. This ultimately also allows for better thermal shrinkage.
• the barrier film can have a thickness of between 10 ⁇ m and 40 ⁇ m, preferably between 15 ⁇ m and 30 ⁇ m.
• the relatively low thickness allows the amount of plastic waste generated to be reduced.
• the film for the film bag or for the packaging can consist of two separate webs of flat film, whereby the two webs advantageously have the same width and are guided over one another with some spacing, with the carrier with the object to be packaged in or on it lying between the two webs. The process then forms four airtight weld seams to produce the film bag, whereby these weld seams preferably adjoin one another and run continuously around the film bag.
• a so-called half-tube can be formed or be formed from a single web of flat film, so that a single web of flat film is, so to speak, folded onto itself along one long side.
• the result is a so-called half-tube.
• the carrier with the object inside is then inserted into this half-tube to ultimately be packaged as a film bag, with only three weld seams being formed for this purpose.
• the fourth weld seam would have been, the film web is now, so to speak, continuous due to the folding.
• the weld seams formed are then located on the end faces of a package or film bag in the direction of travel and laterally along one of the long sides.
• a barrier film is advantageously sealable and can be heat-sealed or welded, either with other materials or, advantageously, with itself.
• it can have two film layers, advantageously made of PE, which have a so-called barrier layer between them.
• the barrier film is co-extruded, which is particularly advantageous for thermal shrinkage.
• the negative pressure is created and maintained during complete closing. It can fluctuate during this process.
• the negative pressure can also be created or an attempt can be made to actively create it until shortly before the film bag is closed or the film layers are welded, for example by pressing on the film bag or by suction, but this is then stopped. Shortly after stopping, preferably a maximum of 2 seconds or a maximum of 1 second afterwards, the film bag can then be completely closed. Complete pressure equalization cannot take place within this very short time, so that a sufficient negative pressure still exists inside the sealed film bag. In this way, air can still be sucked out or escape through the last remaining opening in the film bag, which is then only closed at the last moment.
• the barrier film can be shrinked by thermal action.
• Hot air, steam, or a water bath can be used for this purpose in a conventional manner; it can advantageously be carried out in a shrink tunnel mentioned above.
• shrinking takes place as the film bag with the carrier and the article inside passes through.
• the negative pressure that has been generated or exists in the film bag in step C) after complete sealing and before shrinking of the barrier film can be between 0.01 bar and 0.9 bar, particularly preferably between 0.1 bar and 0.5 bar. This is sufficient to keep the expansion of air in the sealed film bag in a subsequent thermal shrinking process so low that it does not negatively affect or prevent the shrinkage of the film.
• the carrier with the object thereon is first inserted into the barrier film in such a way that the barrier film is below the carrier and overlaps continuously and uninterruptedly upwards onto the carrier and the object thereon on a first lateral side.
• both film layers can protrude beyond the carrier and the object thereon.
• the two film layers can then be welded together on this second lateral side, in particular at a distance from the second lateral side of the carrier that is less than 20% or less than 10% of the distance between the two lateral sides. Any film overhang outside the film bag can be cut off.
• the welding takes place at least on the second lateral side, advantageously on both lateral sides, in a continuous process. Particularly advantageously, it takes place constantly or at a constant speed, or at least without interruption.
• the carrier with the object thereon can be moved along a transport direction, with the two film layers being connected to one another in a transverse direction running transversely to this transport direction or being connected by welding.
• This can already have been done on a front side of the carrier as seen in the transport direction, which is also known in serial packaging from the aforementioned prior art.
• the film bag can be finally sealed by welding the two film layers together on a rear side opposite the front side; this is essentially the final weld seam.
• the interior of the foil bag can contain normal air, i.e., no protective gas, advantageously with the negative pressure. This saves the effort that would be significant, especially when applying or generating the negative pressure.
• the interior of the film bag can contain a protective gas, for example a common protective gas for food such as carbon dioxide or nitrogen, advantageously also with a negative pressure. Nevertheless, the aforementioned negative pressure can still be present here.
• a protective gas for example a common protective gas for food such as carbon dioxide or nitrogen
• the aforementioned negative pressure can still be present here.
• dry ice which is placed inside the package. In some applications, it is easier to handle than gaseous carbon dioxide. When the dry ice outgasses, carbon dioxide is released, which completely replaces the air inside the film bag, leaving an atmosphere of 100% carbon dioxide in the film bag. This escaping air or excess carbon dioxide must escape from the film bag via the pressure relief valve or the vent hole until the dry ice has completely evaporated.
• the negative pressure according to step C) can be generated in the film bag by inserting an elongated, inherently stable pipe or another suction pipe or a suction hose into the not yet completely sealed film bag is introduced or is located inside it. This allows air to be sucked out of the foil bag or negative pressure to be created, with the air being sucked out particularly while the foil bag is being sealed.
• the piping should be removed before the foil bag is completely sealed, i.e., while the foil bag is only partially sealed.
• the negative pressure according to step C) can be generated in the film bag by creating a negative pressure in a laterally sealed film tube for several film bags.
• Several objects are always lined up one behind the other in this film tube, and they are advantageously moved largely continuously.
• a welding stamp running transversely to the longitudinal direction or a so-called cross-welding device can then seal or close and separate the first object in the film tube outside of a functional unit that generates the negative pressure.
• the cross-welding device should preferably be designed to move along, at least for a short distance, so that it can seal or close and separate while moving along. This way, the movement of the film bags or the objects to be packaged does not need to be interrupted.
• An aforementioned suction pipe or the like for generating the negative pressure can then be immobile or static in the film tube, advantageously in the area near the cross-welding device, particularly advantageously 10 mm to 70 mm, for example 40 mm, away from it.
• Such a transverse welding device can generally be provided to divide the film bags in the longitudinal direction and, above all, to weld and thus also close them.
• gas and/or air can be forced out of the film bag before the film bag is completely closed, i.e., not sucked out.
• This can preferably be done by applying or exerting pressure from one side, in particular from above, across a flat and resilient or flexible area on the film bag.
• This can be done with a soft-elastic or resilient plate, brush, or a foam pad, or the like.
• it can be done with compressed air, which has the advantage of less wear and less risk of damage.
• a so-called barrier film can be used for packaging an object on a carrier using a method described above.
• a barrier film can have a thickness between 10 ⁇ m and 30 ⁇ m. It can advantageously be almost a monomaterial. and consist of, for example, 95% PE, whereby it can be multi-layered and consist of two thin layers of PE film.
• the barrier film can consist of 5% other material, which forms a barrier layer between the two layers of PE film. This barrier layer prevents the penetration of bacteria, germs, etc.
• Such a barrier film has the great advantage that it can be easily recycled.
• the aforementioned carrier if this is made of cardboard or paper, for example, even if it has a thin coating of wax, thin film, or similar, which makes the carrier waterproof or moisture-resistant. For better recycling, however, this should be avoided; if necessary, a separate absorbent fleece made of compostable or recyclable material can be provided on the carrier.
• FIG. 1 A piece of salmon fillet 11 is depicted as a food or as an object to be packaged, lying on a carrier 13.
• the carrier 13 is made of cardboard, possibly with a very thin coating on its upper side towards the salmon fillet 11.
• a separate layer of absorbent fleece can be provided.
• the carrier 13 should preferably be free of plastic and/or be recyclable. It is tray-shaped with a carrier base 14 and a circumferential carrier edge 15 bent over at the top and projecting outwards. This is also shown by a comparison with the illustration of the Fig. 3 Such carriers 13 are known in the prior art.
• a separate layer of absorbent fleece prevents the cardboard carrier 13 from being soaked through by the juices of the salmon fillet 11, thus remaining stable.
• This bundle of salmon fillets 11 on the carrier 13 must now be packaged for sale in a foil bag. This is best done in a factory where the salmon is also cut into salmon fillets 11.
• Fig. 2 Such a film bag 18 is shown around the carrier 13 with the salmon fillet 11 therein, with the film bag 18 already shrunk here and thus closely adapted to the shape or contour of the carrier 13 with the salmon fillet 11 therein.
• shrinking is carried out thermally, as previously explained, advantageously by passing through a thermal shrink tunnel, whereby a film material of the film bag contracts and ensures a tight fit of the film.
• Another advantage of this tight fit is that the package consisting of the carrier 13 with the salmon fillet 11 therein is somewhat stabilized.
• the film for the film bag 18 is a special barrier film, or so-called EVOH film, as described above.
• the foil bag 18 is in Fig. 3 Shown in plan view for better explanation with a transport direction T.
• the film bag 18 has a bottom 19, a top 20, and three circumferential side weld seams 22a, 22b, and 22c.
• the fourth side 23 i.e., the left side, the film runs continuously from the bottom 19 to the top 20.
• the film bag 18 is thus formed with the aforementioned half-film tube and therefore only needs to be joined on three sides by means of thermal welding.
• the edge welds 22a to 22c seal the film bag 18 hermetically, so that no impurities or germs can enter the film bag 18 and the salmon fillet 11.
• Fig. 4 During the sealing process, negative pressure is generated in the film bag 18 or air is sucked out.
• Fig. 4 This is shown very simply schematically by the fact that the carrier 13 with the The salmon fillet 11 has already been wrapped into the half-film tube on the top and bottom sides, as is known from the aforementioned prior art.
• the front edge weld seam 22a is already created by severing the essentially continuous half-film tube using a simplified cross-welding device 35. This front edge weld seam 22a extends across the entire width and seals the film bag here, connecting the bottom 19 and top 18 firmly and airtight to one another.
• the right edge weld seam 22b is also completely produced, namely by means of a side welding device 37 which is also known from the prior art.
• Such side welding devices 37 are known, for example, from DE 199 05 888 A1 or the DE 10 2006 018 083 A1 .
• Corresponding cross-welding devices are known, for example, from the DE 102011 075 532 A1
• a camera 38 is arranged on the side welding device 37. This camera is part of a monitoring device with which the quality or the desired and proper production of the edge weld seam 22b on the side can be monitored. Should any quality problems arise, the corresponding packaging can be directly ejected and disposed of, or the carrier 13 contained therein, including the salmon fillet 11, can be repackaged.
• a suction pipe 39 is inserted from the rear into the film bag 18, which is still open in this area.
• air is sucked out of the film bag 18, or a negative pressure is created therein.
• This causes the underside 19 of the film bag to adhere to the support base 14 from below and to its side walls, but above all, the upper side 20 of the film to rest on the upper side of the salmon fillet 11. Due to the usually slightly moist upper side, the film also adheres here, which has the advantage that no air can then flow in.
• the closed film bag 18 can then be heated in the usual way, which need not be illustrated here, for thermal shrinkage. of its film. This is advantageously done in a shrink tunnel as mentioned above, such as the one used in DE 199 20 057 A1 or the US$3,777,446 Due to the negative pressure or the very low air volume within the film bag 18, no large volume expansion can occur due to heating, which in turn does not disturb the thermal shrinkage of the film and thus the contraction, or not significantly.
• the Fig. 2 and 3 a foil bag 18 which fits tightly or is shrunk tightly onto the carrier 13 with the salmon fillet 11 on it.
• the suction pipe 39 cannot remain stationary in this position. It may have to be inserted anew each time from the rear into a partially closed film bag.
• the half-film tube can continue continuously with carriers 13 in it towards the rear carrier edge 15, where the edge weld seam 22c is placed. In this case, it may be sufficient if the suction pipe 39 extends into this half-film tube and sucks out air well in front of the cross-sealing device 35 and the side-sealing device 37, for example 1 m or 2 m.
• Air can flow into the half-film tube on the right-hand side, while at the front the edge weld seam 22a is always closed by the cross-sealing device 35. Despite this inflow of air, a negative pressure can be maintained in the film bag until the moment at which it is closed with the transverse sealing device 35 and thus also separated from the remaining half-film tube, which promotes air extraction.
• FIG. 5 shows accordingly Fig. 2 and 3 a completely sealed foil bag 118 with a carrier 13 and salmon fillet 11 therein.
• the foil bag 118 is continuous on the left free side 123, as it is formed from a half-film tube as described above. It is welded at the edge welds 122a, 122b and 122c as shown in the illustration of the Fig. 4
• the film bag 118 has a vent hole 125, which may have a diameter of, for example, 2 mm or 3 mm. This can be introduced in various ways.
• vent hole 125 It can be created by piercing, or alternatively by thermal treatment to strengthen the edges of the vent hole 125 so that it cannot tear further as easily. Instead of being located on the top side 120, it could also be located close to one of the edge welds 122a to 122c.
• the film bag 118 with carrier 13 and salmon fillet 11 therein can then be heated in a thermal shrink tunnel as described above. This shrinks the film of the film bag 118 and lies tightly against the carrier 13 including the salmon fillet 11, as previously described. Warmed and thus expanded air within the foil bag 118 can escape through the vent hole 125 during shrinking.
• the bag can then be Fig. 6 a sticker 126 is affixed to the top side 120 and over the vent hole 125.
• This sticker 126 can advantageously also contain information about the contents of the foil bag 118, as an alternative to its special packaging type, for example a brand name of this special packaging type. This can prevent the aforementioned contaminants or germs from entering the foil bag 118 and reaching the salmon fillet 11 through the vent hole 125. This possibility corresponds to the step E mentioned above), while the representation of the Fig. 4 corresponds to the aforementioned step C).
• a foil bag 218 can be used Fig. 5 with one in Fig. 7 through a vent hole that cannot be seen, so that as much air as possible can be removed from it.
• the film bag 218 with carrier 13 and salmon fillet 11 inside can be placed on a base.
• a type of soft stamp 241, for example with an elastic foam base 242 is applied from above. This foam base 242 is so soft that it essentially presses air out of the film bag 218, which can escape through the vent hole. At the same time, however, it does not damage or impair the contents of the film bag 218.
• a pressure relief valve 328 is provided on the upper side 320 of a foil bag 318 with carrier 13 and salmon fillet 11 therein. It can, for example, be connected to a vent hole similar to the Fig. 5 be applied, advantageously after the production of the essentially finished film bag 318 with edge welds 322a to 322c.
• Such pressure relief valves 328 are generally known from food packaging, for example from bags for coffee beans. They have a central outlet opening 329 and an invisible membrane or the like inside.
• the air can escape through the pressure relief valve 328 and the outlet opening 329.
• the overpressure is thus dissipated without any problem.
• the pressure relief valve 328 is airtight. This means that the film can contract during shrinking, since the Excess or contained air can escape. However, after cooling or even during the cooling process, no air can flow into the foil bag, which is also advantageous for hygiene reasons.
• the carrier 13, including the salmon fillet 11 therein can be inserted into a pre-printed film such that the imprint is located at a precisely desired and predetermined location, in particular on a top side 20.
• the imprint can also be such that a desired image is obtained after a precisely defined shrinkage of the film. This is known per se from the prior art and need not be explained in further detail here.

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Citations (13)

• 2024
  • 2024-04-16 DE DE102024110670.0A patent/DE102024110670A1/de active Pending
• 2025
  • 2025-04-08 EP EP25169174.7A patent/EP4635863A1/fr active Pending

Patent Citations (13)

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