ES2747790T3 - Packaging for food products and method for their manufacture - Google Patents

Abstract

Packaging for food products comprising a space (2) equipped with edges for packaging the food products and comprising a fixing surface or a fixing edge at the upper edge (6) of the space mentioned to fit a lid (1) so that is an upper surface of the container, container in which a frame of the space (2) is made of recyclable cardboard, and the frame of the space (2) is formed with the help of folds so that the upper edges (6) of all the sides of the frame are adjusted to be at the same height as the upper surface by means of the dimensions of the folds that form the frame and the mentioned space (2) is lined on the inside with a separate film for food products (5) which is flipped to extend over the upper edge (6) surrounding the frame, where the food container comprises a tear point (4) and the film (5) is configured to be removed from the base tidor mentioned when pulling the tear point (4), and where, to facilitate the removal of the film for food products (5), the mentioned film (5) is arranged at the tear point (4), characterized by the fact that the tear point (4) extends over the upper edge (6) of the frame and is separated by a perforation (14) from the upper edge (6).

Description

DESCRIPTION

Packaging for food products and method for their manufacture

[0001] The invention relates to a container for foodstuffs comprising a space equipped with edges for the foodstuffs to be packaged and, at the upper edge of the mentioned space, a joint surface or a joint edge for arranging a lid to form an upper surface of the container.

[0002] Plastic and metal rack containers are previously known as containers for food products. Box-type packages made of cardboard are also known, but they use a laminated film for food products on the surface of the cardboard. The result of using this type of laminated film for food products on the surface of the cardboard is that the cardboard is not suitable for recycling in cardboard containers. Plastic and metal packaging racks that are accepted for use with food products can be used, and these materials can be recycled through the appropriate recycling points, but racks made from these materials have higher costs than racks. conventional cardboard.

[0003] Furthermore, a container for food products is known from publication WO 2009/138786 in which the container has a bowl-like frame. A plastic film is formed in the frame cavity with the help of heating and a pressure difference. The film is formed at the location of the bowl-shaped frame first in an opposite direction relative to the cavity of the bowl-shaped frame with the help of a specific counter-mold and a pressure difference, and then in the next stage it is placed in the cavity of the frame with the help of the pressure difference.

[0004] Publications DE 196 54 230 A1 and DE 43 27 669 A1 disclose food packaging solutions with a removable lid and removable film coating. However, removal of the cap and film coating is done from the recess for pulling. This configuration is very difficult to use since, when opening the lid of the container, it is not easy to pull the lid only through the recess, since the coating film layer extends just below the lid layer.

[0005] Publication EP 2 441 696 A1 discloses a food packaging solution with a removable lid from a punctured tear point, but without removal of the coating film.

[0006] Publication WO 2013/002639 A1 discloses a food product packaging solution with a complicated configuration, where the lid and the film are separated from the frame. According to this solution, a separate plastic ring, comprising the film, the lid and the rim, is attached on the frame of the container. This solution is different, complicated and expensive to produce compared to the invention.

[0007] Placing the plastic film in the frame cavity in the manner described above is difficult and slows down the packaging process when the plastic film is first formed in the other direction with the help of heating and a pressure difference and then, in the next step, in the opposite direction in the cavity of the bowl-shaped frame. This manufacturing method is not very advantageous because, on the contrary, in the packaging process all excessive and multiple work phases should be avoided, which decrease the speed of the packaging line.

[0008] In order to eliminate these disadvantages and to create a food product packaging made from recyclable material, a new food product packaging has been developed in which the used materials can be easily separated and each material can be classified separately to take it to its recycling point. What has been presented in claim 1 and in dependent claims 2-4, is characteristic of the packaging for food products according to the invention.

[0009] What has been presented in claim 5 and in dependent claim 6 is characteristic of the method for manufacturing a container for food products according to the invention.

[0010] The advantage of the container for food products according to the invention is the fact that a rack made of conventional cardboard can be used as a rack for the container, where said rack can be configured to take the shape of a glass or bowl desired at least with the aid of folds, and you can configure for it an upper edge to which the lid can be attached. When the package is to be discarded, the cardboard frame and the food film covering it can be easily separated, as well as the lid of the package, where all these are separated and each one is made of its own homogeneous material, where they can be placed in their separate recycling points.

[0011] Hereinafter, the invention is described in more detail with reference to the accompanying drawings, where

Figure 1 shows a container for food products.

Figure 2 shows a package of Figure 1 when a lid is removed and the overlay film is in place.

Figure 3 shows a cardboard frame seen from above.

Figure 4 shows a cardboard frame as a side view.

Figure 5 shows an open carton frame.

Figure 6 shows a partially folded cardboard container frame.

Figure 7 shows a fit of the plastic film in a frame space.

[0012] Figure 1 shows a container for foodstuffs, a container for foodstuffs comprising a quadrangular bowl-like frame, frame forming a space 2 for foodstuffs and a lid 1 which is attached to the top from the frame, a cover that can be detached in a conventional way by pulling the tear extension 3. The cover 1 is made of cardboard or plastic for food products on which the necessary information can be printed.

[0013] Figure 2 shows the food product container of figure 1 when the lid 1 has been removed. In this way, you can see the foodstuff film 5 that is snug within the frame, the foodstuff film 5 that is snug against the frame and whose edges extend over the edge edge folds. From food film 5, part 4 extends over the edge of the frame where the mentioned film 5 can be removed from the frame by pulling part 4. Film 5 also extends over part 4 and, as part 4 has been perforated so that it can be separated along line 14 from the rest of the edge part, said film 5 can be easily removed by pulling the film-covered part 4.

[0014] Figure 3 shows a container frame made of normal cardboard and formed with the help of folds, inside which a locating space 2 for food products is formed when the mentioned space is covered with a film for products. 5. With the help of the folds, a fixing surface can be formed that surrounds the upper edge 6 of the created frame, where said fixing surface is at the same height in the entire area that forms the entire upper edge 6. The folding configuration, with the help of which the flat top edge 6 can be created, is shown in Figures 4-6. The enlargement shows a hole 15 located in the edge part 6. The plastic film 5 can be place over the hole 15, at which location the film 5 can be pulled and the film 5 can be torn at that point to separate it from the location space 2 when it is desired to separate the materials for recycling aje.

[0015] Figure 4 shows the frame of the container of figure 3 as a side view. The frame comprises several folds, where the folds are attached to other frame parts with glue when the frame required for the container is gradually folded using the straight cardboard and cut to shape. If the cover 1 is a plastic film for foodstuffs, it is attached to the fixing surfaces, in other words, to the upper edges 6 of the frame with a glue suitable for use with foodstuffs, upper edges that already have a film plastic for food products 5 as the first bonded layer. An alternative cover 1 made of cardboard is attached to the film 5, which is attached to the frame fixing surface accordingly with glue.

[0016] In Figure 5, the cardboard preform of a packaging rack is shown as a straight plate. The preform is trimmed at its outer edges according to its final shape. The trimmed portions of the interior of the preform are shown with a reference number 7. All other lines within the preform show fold lines. At the location of these lines, preliminary folds or folds or other shapes have been made that control folding.

[0017] In figure 6, the preform of figure 5 is shown slightly folded, where the space 2 itself, in other words, the cavity that is located within the fixing surfaces of the upper edge 6, is already formed. The tabs 10 and 8, 9 and 11 and 12 and 13 are not yet folded and must be glued together, among them the tabs 9 and 10 fold against the bottom surface of the upper edge fixing surfaces 6 and the tabs 8, 11 and 12 are attached to the sides of the frame and part 13 is attached to the bottom of the frame.

[0018] In figure 7, the fit of the plastic film 5 of the support to the cavity of the frame according to the invention is shown, where the cavity functions as the space 2 for the food product. The movement of the film 5 stops when the frame of the container has been moved to the film placement station 5, where there is a heating / blowing tool 16 for the film 5 above the film 5 and a tool suction 17 for film 5 below that film. The tools on the upper side 16 and on the lower side 17 move together to contact the film 5 so that the edges of both tools are pressed against each other. The film 5 and the upper edges 6 of the frame will be pressed against each other in this way.

[0019] Hot air is emitted towards the film 5 through the tool that is located above the film. More advantageously, the hot air begins to be emitted before the tool comes down and comes into contact with the film 5. The suction begins through the tool 17, which is located below said film, when it is raised so that it enters in contact with the upper edges 6 of the frame. Suction from Below is made through cardboard that works as a frame. This method considerably facilitates the removal of air from between the container frame and the film 5. Although in this case tools 17 and 16 are mentioned as tools that are located below and above said film, naturally their positions may also be in other directions with respect to film 5, but on opposite sides of film 5.

Claims (6)

1. Container for food products comprising a space (2) equipped with edges for packaging food products and comprising a fixing surface or a fixing edge on the upper edge (6) of the mentioned space to fit a lid (1) to be a top surface of the container, container in which a space frame (2) is made of recyclable cardboard, and the space frame (2) is formed with the help of folds so that the upper edges (6) all sides of the frame are adjusted to be at the same height as the top surface by means of the dimensions of the folds forming the frame and the mentioned space (2) is covered on the inside with a separate foodstuff film ( 5) which flips to extend over the top edge (6) surrounding the frame, where the food package comprises a tear point (4) and the film (5) is configured to be removed ada of the mentioned frame when pulling the tear point (4), and where, to facilitate the removal of the film for food products (5), the mentioned film (5) is arranged at the tear point (4), characterized by the fact that the tear point (4) extends over the upper edge (6) of the frame and is separated by a perforation (14) from the upper edge (6). 2. Food product container according to claim 1, characterized in that the lid (1) is made of recyclable foodstuff plastic or recyclable cardboard. 3. Food product packaging according to claim 1 or 2, characterized in that the lid (1) is attached with the help of glue to the upper edge (6) of the frame on the surface of the food product film (5 ) which is located on the upper edge. Food packaging according to any of the preceding claims, characterized in that the food film (5) covering the frame is formed / stretched to have the shape of the frame. 5. Method of manufacturing a container for food products comprising a space (2) equipped with edges for packaging food products and a fixing surface or a fixing edge located on the upper edge (6) of said location space at As the lid (1) is joined to form the upper surface of the container, the space frame (2) is formed from recyclable cardboard and with the help of folds, so that the upper edges (6) on all sides of the frame are located at the same height as the upper surface due to the dimensions of the folds that form the frame, and a tear point is formed (4), and the mentioned space (2) is covered on the inside with a film for separate food products (5) whose edges extend above the upper edge (6) of the space frame (2), also covering the tear point (4), where, in the film adjustment phase (5) , the movie area The necessary ula (5) is pressed against the upper edges (6) of the mentioned frame between the edge parts of the tools (17), (16) that are located below and above the film, where, through the tool (17), a depression is formed between the film (5) and the frame and heating of the film (5) is provided at least through the tool (16), characterized in that the tear point (4) extends over the upper edge (6) and is separated with a perforation (14) from the upper edge (6). 6. Method according to claim 5, characterized in that the depression is sucked through the mentioned frame between the film (5) and the space frame (2).