EP0604507B1 - Recipient pour l'emballage de produits alimentaires, et procede et dispositif de fabrication d'un tel recipient - Google Patents

Recipient pour l'emballage de produits alimentaires, et procede et dispositif de fabrication d'un tel recipient Download PDF

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Publication number
EP0604507B1
EP0604507B1 EP92919580A EP92919580A EP0604507B1 EP 0604507 B1 EP0604507 B1 EP 0604507B1 EP 92919580 A EP92919580 A EP 92919580A EP 92919580 A EP92919580 A EP 92919580A EP 0604507 B1 EP0604507 B1 EP 0604507B1
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EP
European Patent Office
Prior art keywords
bowl
cardboard blank
cardboard
plastic
insert
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP92919580A
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German (de)
English (en)
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EP0604507A1 (fr
Inventor
Sylvia Dietrich
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Individual
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Individual
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Priority claimed from DE4130905A external-priority patent/DE4130905A1/de
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    • 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
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/14—Linings or internal coatings
    • B65D25/16—Loose, or loosely-attached, linings
    • 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
    • B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D2565/38—Packaging materials of special type or form
    • B65D2565/381—Details of packaging materials of special type or form
    • B65D2565/385—Details of packaging materials of special type or form especially suited for or with means facilitating recycling
    • 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
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2025—Multi-layered container, e.g. laminated, coated

Definitions

  • the invention relates to a container for the packaging of foodstuffs, with a thermoformed plastic tray and a cover, preferably welded, in the form of a plastic composite film, which is connected to the top side circumferentially via a flange section, according to the preamble of patent claim 1.
  • the invention also relates to a method for producing a food container according to the preamble of claim 19 and a device for performing a method for producing a food container according to the preamble of claim 27.
  • Packaging containers of the type described in the introduction are used and used in particular for foods which, owing to their easy perishability, are particularly useful during transport and storage against external influences, such as, for. B. must be protected from excessive temperature or light influences.
  • These containers must therefore not only be sufficiently dimensionally stable and preferably stackable, but also be such that the goods accommodated in the container are preferably hermetic to the environment, in particular to an oxygen-containing one Atmosphere is shielded.
  • Another important criterion for these containers is that the manufacture or processing of the container as well as the filling can be carried out easily, preferably with a space-saving, linearly arranged production system.
  • These production systems have the advantage that they can be constructed modularly, so that the individual workstations can be put together individually, depending on the container to be manufactured, and can thus be used economically.
  • a conventional container of this type generally consists of two parts, namely a deep-drawn plastic shell with an edge flange on the top and a cover welded to it in the form of a plastic composite film.
  • This plastic composite film regularly has a carrier material layer made of, for example, axially stretched polyamide or polyester, a carbon dioxide or oxygen barrier layer made of ethylene vinyl alcohol (EVOH) and a sealing layer for sealing the cover with the rest of the shell, the sealing layer in the Usually consists of a polyethylene plastic system.
  • the container bottom ie the deep-drawn plastic shell of the container, is also made from a plastic composite film in the case of higher-quality packaging.
  • dimensionally stable films are used, for example polystyrene-based films with a thickness in the range between 700 and 1000 ⁇ m.
  • the polystyrene base layer in turn carries a barrier layer made of an ethylene-vinyl alcohol system and a polyethylene sealing layer facing the cover, which can be thermally welded to the cover.
  • These films are suitable for both negative and positive deformation with and without mechanical pre-stretching of the film. In this way, container shapes of different designs and strengths can be produced with relatively easy-to-control machines, with the retrofitting of the Packaging system when moving from one product to the other can proceed relatively quickly.
  • a container made of a laminate is known from DE-GM 73 30 156, which has a cardboard layer and at least one side with a polyester cover layer.
  • the main application of this laminate is seen in its use in the manufacture of a container suitable for cooking or reheating food for humans.
  • the laminate is suitably cut for this purpose, then folded and pressed into a shape in the form of a shell, the parts of the surface which are superimposed during the folding being attached to one another by heat sealing.
  • German Patent 1,036,153 an apparatus for producing flat packs is described, which consist of thermoplastic coated paper, which is cut and folded in such a way that there are also lateral, outwardly bent upper packaging edges, over which a cover sheet made of plastic is then welded all around in a sealing station.
  • a protective gas such as, for. B. carbon dioxide
  • Carbon dioxide has a volatility that is about 4 times higher than that of oxygen. Easily perishable goods can therefore not be stored in a package according to DE-PS 1 036 153.
  • the method known from this document cannot be combined with deep-drawing systems of conventional Bauert without making drastic changes to the system.
  • a container for frozen food which is formed by a dimensionally stable shell with a film lined on the inside and a lid sealing film.
  • the shell is made from a pre-cut blank that is only folded at the fold lines to obtain a spatially stable structure.
  • the film subsequently molded into the shell does not lie against the shell wall, so that an air cushion can form. As a result, only a bowl-shaped shape for sealing the container against leakage of liquid is produced.
  • a folded cardboard blank is also lined on the inside with a plastic system, which then also forms the circumferential, angled flange for the attachment of a cover film.
  • the cardboard blank is designed in such a way that it is smaller in area than the outer surface of the inserted plastic film. The stiffening function of the cardboard blank is therefore also relatively limited in this known case.
  • a complete, stiffening sheathing of a trough-shaped plastic container with a cardboard reinforcement material blank is described in DE-PS 2 034 154.
  • a relatively complex tool is required.
  • the cardboard blank is folded into a negative form, which interacts with an upper stamp, by means of which a film web is then pressed into the form.
  • a suction stamp is used to fold in the cardboard blank, which holds the cardboard blank with a relative movement between the suction stamp and the negative form.
  • a pressure medium is fed into the space between the upper stamp and the molded plastic film by means of the upper die after the plastic die has been molded in, which then provides the final shape of the container and the firm adhesion of the film to the folded blank causes.
  • the invention is therefore based on the object to provide a container for packaging food according to the preamble of claim 1, which is characterized in that the amount of non-recyclable or non-recyclable plastic required to produce the container is considerably reduced, wherein at the same time, however, the highest tightness values are still ensured.
  • the structure of the container should also be such that it can be manufactured with conventional, preferably linear packaging machines according to the preamble of claim 27 with as little conversion effort as possible without impairing the performance of these packaging machines.
  • Another object of the invention is to provide a method for producing such a container that is as simple as possible and that fits seamlessly into the process sequence in standard packaging machines.
  • the soft film composite which has a substantially lower surface rigidity than rigid films, is given its shape which stabilizes the container structure an erected cardboard blank, which is used in the shell-shaped, very thin-walled composite film so that it flatly stiffens the soft film composite.
  • the cardboard blank is provided with a plastic coating on both sides, there is the advantage that the flat connection between the stiffening cardboard blank and the soft composite film made into a container can be made in a very short time, for example by a selective or area-covering thermal welding process.
  • the double-sided coating of the cardboard blank also ensures that box-like, spatially stable cardboard inserts can be produced with a high cycle frequency from, for example, strip-shaped but also other blanks - even with a continuous blank bottom, by thermally welding the overlapping fold sections.
  • the processing of the cartons coated on both sides to form spatially stable container inserts with a spatially stable structure and circumferential wall collar can take place with such a high number of cycles that the production of the carton blanks is carried out in parallel with the processing of the soft composite film in a continuous deduction from a supply roll.
  • the folded, at least selectively thermofused cardboard blank which has a spatially stable structure, can be handled like a tray insert with a relatively robust gripper device and accordingly positioned exactly over the depressions molded into the composite soft film.
  • the risk of injuring the very thin-walled soft film composite when inserting the cardboard blank is reduced, especially if the edge areas of the tray insert or the erected cardboard blank have a chamfer surface that is at an obtuse angle to the adjacent wall surfaces.
  • the measures according to the invention make it possible to work with a soft film composite system which only has a thickness in the range between 150 and 200 ⁇ m. In this way, the amount of plastic in the packaging that can no longer be reprocessed can be reduced to approximately 20% compared to conventional containers.
  • plastic coating of the cardboard blank can be made extremely thin-walled, for example with a thickness of about 12 microns, so that this packaging plastic waste is not significant. When using a cellulose or wood pulp bowl, this additional plastic content is completely eliminated.
  • the structure of the container according to the invention is completely sealed from the outside, regardless of the tightness of the shell insert or cardboard blank used, with a circumferential collar wall, in particular in the region of the corner edges.
  • the container according to the invention is therefore also suitable for packaging processes in which the interior of the packaging is evacuated and / or, if necessary, back-gassed after being filled with a stabilizing medium.
  • the result is extremely high-quality packaging, with only a fraction of non-recyclable plastic.
  • Suitable additives to the cellulose or ground wood pulp, which are then pressed into the shell inserts, can be used to take specific account of the food technology requirements, in particular the moisture resistance.
  • the construction of the container according to the invention benefits from the use of a very economical manufacturing process. If - according to a further development of the invention - the cardboard blank inserted into the molded trough of the composite film is obtained from a strip-like material, the opening on the base side, which is already stable in space, regularly results in an opening which can advantageously be used to to stabilize the preformed soft film composite from above by inserting the carton blank from above.
  • the positioning accuracy of the cardboard blank in the preferably deep-drawn composite film can be additionally improved in this way and the risk of damage to the very thin-walled composite film is noticeably reduced.
  • the construction of the container according to the invention enables a manufacturing process that can be integrated seamlessly and without sacrificing performance in the process flow of commercially available packaging machines, as described at the beginning.
  • the linear structure of such packaging systems can be maintained according to the invention. It is only necessary to complete the step of filling the container with the goods to be packaged to precede, in which the cardboard blank stiffening the composite soft film is inserted into the preformed, preferably deep-drawn shape.
  • the device according to the invention for carrying out the manufacturing process for the more environmentally friendly food packaging can be obtained by simply retrofitting packaging systems already on the market.
  • the throughput of the packaging system does not have to be reduced. It is only necessary to provide an additional device with which either spatially stable, i.e.
  • the construction of the container according to the invention opens up the possibility of reducing the amount of cardboard required to form the container to a minimum, which is ensured, for example, by obtaining the erected cardboard insert from a strip-shaped blank.
  • the cardboard insert or the tray insert which is coated on both sides, has a continuous bottom, from which the collar-like above circumferential side walls are angled. In this case there is no longer any risk that an uncoated cut edge of the carton comes into direct contact with the food to be packaged.
  • This measure also effectively prevents the outer appearance of the packaging, for example in the area of the cardboard cut edge suffers from swelling due to moisture. This measure does not have to increase the weight of the packaging. This is because the cardboard can be made with less thickness due to the more stable structure that is supported across the bottom of the blank.
  • the circumferential wall of the tray insert or the erected cardboard blank is designed so that the container opens slightly conically upwards.
  • this measure simplifies the shaping process of the shell and it has the additional advantage that the outer composite film is subjected to as little mechanical stress as possible when the cardboard blank is inserted and when it is subsequently sealed.
  • a high-quality packaging results with the further development according to claim 4.
  • Such soft film composite systems are available on the market with qualities that are optimally adapted to the application area in question. With a thickness of around 150 ⁇ m, these soft film composite systems are safe, i.e. Can be processed with little damage, even if deeper containers have to be formed.
  • the outer layer of the soft film composite system is preferably made of a polyamide plastic, a pretreated, for example corona-treated polyethylene plastic with a high melting point, a polyester plastic or a polypropylene system.
  • a polyamide plastic for example corona-treated polyethylene plastic with a high melting point
  • polyester plastic for example corona-treated polyethylene plastic with a high melting point
  • polypropylene system for example corona-treated polyethylene plastic with a high melting point
  • polypropylene system for the outer layer brings additional price advantages. If a polypropylene system is used, the result is a composite that is completely recyclable without prior separation.
  • the non-easily recyclable soft film composite can be separated very easily from the rest of the container. Nonetheless, a very stable connection can be made via the sealing layer and the plastic coating of the cardboard blank, for example by using a thermal welding process, so that the mechanical stiffening of the flexible soft film composite by the cardboard is maintained over the long term.
  • the barrier layer is still formed by an ethylene-vinyl alcohol (EVOH or EVAL).
  • EVOH or EVAL ethylene-vinyl alcohol
  • the thickness of the plastic casing of the container is greatly reduced, the construction of the container according to the invention opens up the possibility of increasing the thickness of this ethylene-vinyl alcohol layer in relation to the overall thickness. This can improve the protective effect for the food without noticeably increasing the amount of non-recyclable plastic.
  • the cardboard blank insert for the deep-drawn soft film has a very stiffening effect. Nevertheless, the insert can even be made from very simply designed, strip-like cardboard blanks which are formed with individually selected folds or fold lines.
  • the position and size of the opening on the bottom can be influenced in a targeted manner, which advantageously also takes place with regard to the goods to be packaged.
  • a cardboard blank with a continuous bottom is preferably chosen, which then has an even higher load-bearing capacity.
  • the structure of the cardboard blank according to claim 8 therefore has the particular advantage of giving the container sufficient stability with a minimum of cardboard consumption.
  • the width of the base flange is preferably selected so that it lies in the range between 10 and 40% of the container width.
  • this edge flange can also be produced from a strip-shaped blank by thermowelding of folded-over fold sections which overlap in the folded form.
  • the resistance of the container to twisting is additionally improved in this way.
  • the upper, peripheral flange offers protection for the edge of the deep-drawn soft film when inserting the cardboard blank.
  • the cardboard insert With a plastic coating of the cardboard blank according to claim 12, the cardboard insert can on the one hand be erected very easily and, on the other hand, in the erected form it can be economically produced to a warp-resistant structure, preferably thermowelded.
  • the plastic coating according to claim 12 forms a connection with the sealing layer of the soft-film composite system that is as secure as it is quickly producible and that is long-term stable even at low temperatures.
  • the container according to the invention is therefore particularly suitable for deep-freeze packaging. Nevertheless, after opening the container and after the packaged goods have been used up, the cardboard blank can be separated very easily from the flexible film composite system, which further improves the environmental compatibility of the container according to the invention.
  • a very torsion-resistant container insert can be produced, which, in combination with the composite film surrounding this insert, creates a container that is in no way inferior to the conventional container made of thermoformed composite hard film.
  • the double-sided coating of the cardboard blank ensures that the food does not come into contact with the cardboard material itself.
  • a recycling box i.e. an inferior carton can be used.
  • the cardboard coating is also preferably made of a peelable plastic, so that the consumer is able in a few steps to recycle the recyclable Separate the components of the packaging from the non-recyclable components.
  • a particularly advantageous development of the method according to the invention for producing the food container is the subject of claim 19.
  • the packaging system can be made very compact.
  • Another advantage of this embodiment is that the negative mold for the production of the indentations in the soft film composite can simultaneously be used for positioning the soft foil composite with respect to the tray inserts or cardboard blanks to be used. This allows the working accuracy of the manufacturing process to be increased, and the risk of damaging the soft film composite system is already very small in that the shell insert is relatively smooth or smooth.
  • the cardboard insert is plastic coated on both sides.
  • the method according to the invention of the flat stiffening of a soft film composite with a spatially stable, i.e. Rigid cardboard cutting can be carried out in various ways. For example, it is possible to feed the cardboard blank in strip form and to produce the spatial cardboard structure only in the already deep-drawn composite film.
  • the development of the method according to claim 24 leads to particularly stable containers.
  • the interlocking between the shell insert or cardboard blank and the plastic composite film leads to an even higher stability of the container and to an even better stiffening together with the soft film composite, which is not inherently stable on the surface.
  • This type of design of the side walls has advantages when flushing the filling material with gas.
  • the device for carrying out the method can be implemented with conventional components of standard packaging systems. A closer look at the developments of the device according to claims 28 to 42 is therefore not necessary at this point. These further developments aim in particular to protect the soft film composite as effectively as possible during transport through the packaging system and to keep the clock frequency of the device high.
  • the device according to the invention is also suitable for the production of several containers in one work step and in one work station, which is the subject of claim 37.
  • the reference numeral 20 denotes a composite film wound on a roller, as it is offered on the market by the company "WALKI” in various versions with different protective properties.
  • This composite film is a soft film composite, for example with the following structure:
  • the outer layer forming a mechanical protective shield is formed, for example, from a polyamide, a pretreated, preferably corona-treated polyethylene, preferably with a high melting point, or a polyester plastic.
  • the thickness of this layer is, for example, 30 microns.
  • This mechanical protective layer is followed by a barrier layer made of ethylene vinyl alcohol (EVOH or EVAL), which is effective for oxygen and carbon dioxide.
  • EVOH or EVAL ethylene vinyl alcohol
  • the upper layer facing in the illustration according to FIG. 1 is formed by a sealing layer which is preferably formed by a peelable or peelable polyethylene plastic or plastic system.
  • the term "soft film composite" is to be understood in the following to mean a composite film which is flexible, i.e. is not inherently stable.
  • the wall thickness of this soft film composite is preferably in the range between 150 and 200 ⁇ m, the EVAL barrier layer having a thickness in the range between 4 and 30 ⁇ m and the sealing layer in the range between 50 and 100 ⁇ m.
  • the composite film 20 is drawn off, for example, in a width of approximately 400 to 500 mm from a roller 22 and fed to the linearly structured packaging system, which largely includes work stations, such as those realized in conventional packaging machines, for example from the "Multivac" company are.
  • the main stations of the packaging machine are described in more detail below:
  • a deep-drawing station in which the composite film 20 preheated by means of a heating device 32 is negatively deformed in the deep-drawing process.
  • a negative mold tool 34 which can be moved back and forth in the vertical direction (arrow B) is provided, in which four negative molds 36 are formed.
  • the negative molding tool 34 is therefore suitable for the simultaneous production of four deep-drawing operations.
  • the invention is not limited to the special arrangement and shape of the containers shown. Rather, any type of packaging and also of packaging groups can be produced by replacing the negative molding tool 34 in the area of the deep-drawing station 30 without departing from the basic concept of the invention.
  • Each negative mold 36 is connected via a line duct system 38 to a negative pressure connection 40, so that a vacuum can be generated in a time-controlled manner below the composite film 20 drawn over the negative molds 36, with which the composite film can be brought into the form shown in FIG represents later, finished food container.
  • a vacuum can be generated in a time-controlled manner below the composite film 20 drawn over the negative molds 36, with which the composite film can be brought into the form shown in FIG represents later, finished food container.
  • four indentations are introduced into the composite film 20 per tool stroke. The indentations are identified in FIG. 1 by reference number 42.
  • the composite film or the soft film composite runs intermittently by means of a transport chain to a work station 50, in which - preferably in one operation - a corresponding number of torsionally rigid cardboard blanks 52 are inserted into the group of four of the indentations 42.
  • the composite film In the area of this workstation, 20 is still connected over the entire surface, which can best be seen from the illustration according to FIG. 3.
  • the thin soft film composite 20 is not - emphasized in the illustration according to FIG. 3 - supported between the individual indentations by a guide rail.
  • the exact positioning of the indentations 42 in the work station 50 is carried out with the aid of a lower tool part 54, which is guided to be movable in the vertical direction via columns 58 and has inner recesses 56 which form the negative for the final shape of the packaging to be produced.
  • the depth T of the inner recess 56 is equal to the dimension V of the indentation 42.
  • the remaining contour of the inner recess 56 also corresponds to the shape of the indentation 42, so that when the lower tool 54 is moved upward, there is a flat, full contact of the composite film 20 on the lower tool 54.
  • the reference numeral 60 shows a transport and shaping stamp, referred to below as the transport plate, which is also mounted such that it can move in the vertical direction and is held on a swivel arm 62 with a swivel axis 64.
  • the transport plate. 60 has a number of projections in the form of positive molds 66 corresponding to the number of inner recesses 56 below, with which cardboard blanks which are to be described in more detail below and are brought into a box-like shape can be transported from a folding station 70 to the workstation 50 and can be inserted into the indentations 42.
  • the cardboard blanks 52 are obtained from a cardboard coated on both sides, which is wound on a cardboard roll 72.
  • the production of the cardboard blanks 52 takes place synchronously and in time with the processing of the soft film composite 20.
  • 74 is a cutting device with which the cardboard web 76 in strips 76-1 to 76-4 is divided. The number of strips corresponds to the Number of containers to be processed simultaneously in one work step.
  • the strips 76-1 to 76-4 subsequently run into a folding device 78, in which the individual strips are provided with such a cut and folding lines 80 that a cup-like cardboard insert 52 is produced from a single strip in a cardboard folding device 82 , which is held in position by the individual positive molds 66 on the transport plate 60.
  • a folding device 78 in which the individual strips are provided with such a cut and folding lines 80 that a cup-like cardboard insert 52 is produced from a single strip in a cardboard folding device 82 , which is held in position by the individual positive molds 66 on the transport plate 60.
  • the cardboard inserts 52 located on the underside of the transport plate 60 are only indicated with dashed lines, only two such cardboard inserts being shown for reasons of simplification.
  • the transport plate 60 is preceded by a device 84 in which individual strips 86-1 to 86-4 which have been cut to length are erected in a box shape and are firmly connected to one another in the region of the overlapping fold sections, preferably thermowelded, so that spatially stable at the exit of the device 84 , torsion-resistant cardboard cut inserts 52 are present, which can be gripped by means of the transport plate 60 and positioned precisely by means of a clocked, cyclical pivoting movement, which is indicated in FIG. 1 by the arrow S, over the inner recesses 56 of the lower tool 54 of the work station.
  • a device 84 in which individual strips 86-1 to 86-4 which have been cut to length are erected in a box shape and are firmly connected to one another in the region of the overlapping fold sections, preferably thermowelded, so that spatially stable at the exit of the device 84 , torsion-resistant cardboard cut inserts 52 are present, which can be gripped by means of the transport plate 60 and positioned precisely by means of
  • the cardboard 76 is provided on both sides with a plastic coating which consists of a thermally weldable polyethylene plastic (PE).
  • PE polyethylene plastic
  • the thickness of this plastic coating is, for example, in the range between 10 and 15 ⁇ m and the arrangement is preferably such that the coating is easily peelable, ie peelable.
  • the core material of the coated cardboard 76 consists of so-called recycled cardboard and a basis weight in the range between 200 and 300 g / m2 is preferably selected for the cardboard blank.
  • the folding of the cardboard strips 86 takes place in coordination with the shape of the positive mold 66 in such a way that the cardboard insert 52 surrounds the positive mold 66 in a form-fitting manner.
  • the height H of the cardboard insert essentially corresponds to the dimension V of the indentation 42 or the depth T of the inner recess 56 in the lower mold 54.
  • a large number of strip-like or rib-shaped pistons 90 arranged in rows are slidably slidably received in the side wall of the positive mold 66.
  • the control spaces 92 lying behind these strip-shaped or rib-shaped pistons 90 are connected to a channel system 94. If the control spaces 92 are pressurized in a timed manner via the channel system 94, the rib-shaped pistons 90 can extend slightly beyond the wall 98 against the force of return springs 96 and come into frictional engagement with the inner surface of the walls 88 of the erected carton 52. This state the strip-shaped piston 90 is indicated in FIG. 11 on the side wall 98 facing the viewer, while the rib-shaped pistons 90 are shown in the retracted position in the adjacent side wall.
  • the cardboard inserts are formed from strips 86-1 to 86-4.
  • a structure is formed with a circumferential collar formed by the wall sections 88 and an open floor 100 which is essentially at right angles thereto and which is formed by floor flanges 102 which are bent inwards.
  • the width B102 of these flanges is an adjustable fraction of the total width W of the container.
  • a compressed air duct system 104 is provided in the transport plate 60 and the associated holder, with which an air flow indicated by the arrows 106 can be generated in a time-controlled manner.
  • the air flow emerges from the bottom end face of the positive molds 66 and is directed into the interior of the indentations 42, so that when the lower tool 54 is moved upwards, the full contact of the deep-drawn composite film 20 on the inner wall of the recess 56 is promoted.
  • the compressed air duct system 104 can also be used to control the stroke movement of the rib-shaped pistons 90.
  • FIGS. 1 and 3 differ from one another insofar as the cardboard insert according to FIG. 1 is not only equipped with a bottom flange 102 but also with an upper edge flange 108 with an optional width B108. However, this top edge flange 108 is only beneficial if particularly heavy packaging is to be produced.
  • Figure 4 shows this top flange 108 particularly clearly. Hatched areas 110 are indicated where folded fold sections of the cardboard blank overlap in the erected form. In these areas, there is preferably a flat or selective thermal welding instead of. Since the cardboard is coated on both sides, a firm connection of these overlapping areas can be ensured regardless of the folding method.
  • FIG. 6 shows the position assignment between the lower tool 54 and the transport plate 60 as the upper tool shortly before the bottom dead center of the transport plate 60 is reached.
  • the lower tool 54 has already reached the top dead center.
  • the cardboard insert 52 lies together with the composite film 20 snugly against the inner contour 56 of the lower tool 54.
  • the positive molds 66 of the transport plate 60 are positively immersed in the indentations.
  • the cardboard insert 52 is thereby pressed flat against the composite film 20 both in the area of the wall sections 88 and in the area of the bottom flange 102 and - if present - also in the area of the upper edge flange 108.
  • the upper flange 108 which may be present - see FIG.
  • a heating device designated 112 is actuated, so that in the area of the contact sections between the cardboard insert 52 and the composite film, spot or area welding occurs at the points 118. This welding covers the entire contact area between the cardboard insert 52 and the film 20.
  • the cardboard insert thus stiffens the flexible, i.e. flaccid soft film over a large area, so that the dimensional stability of the cardboard insert 52 is completely transferred to the soft film composite 20.
  • the inner recesses 56 in the lower tool part 54 are designed in the way that this is the case in detail 9 can be removed.
  • a series of elongated depressions 116 are formed in wall surfaces 114, which, when the positive molds 66 are completely retracted, lie flush with the strip-shaped pistons 90. This state can be seen in the section according to FIG. 8.
  • the duct system 94 is pressurized with compressed air so that the rib-shaped or strip-shaped pistons 90 perform a full stroke outwards and the carton 52 together with the outer skin from the soft film composite 20 into the Depress recesses 116 against the force of the return springs 96.
  • the springs 96 push the pistons 90 in question again.
  • the beaded shape of the side walls is retained and also contributes to an improvement in the areal connection between the cardboard insert 52 and the soft film composite 20.
  • FIG. 5 shows an enlarged representation of a section of the container immediately after the connection between the cardboard insert 52 and the soft film composite 20 has been completed.
  • This representation shows the multilayer structure of both the coated cardboard and the soft film composite.
  • 52-1 denotes the core area made from recycled cardboard.
  • 118 denote those locations at which a thermal seal is produced between the coating film 52-2 and a sealing layer 20-3 of the soft film composite 20.
  • the sealing layer preferably consists of peelable, ie peelable polyethylene (PE plastic).
  • 20-2 denotes the oxygen and CO2 barrier layer made of ethylene vinyl alcohol (EVAL) and 20-1 the mechanical protection outer layer, which is formed either from a polyamide, a pretreated, preferably corona-treated high-melting point polyethylene or a polyester plastic is.
  • EVAL ethylene vinyl alcohol
  • the indentations 42 braced in this way finally leave the work station 50 and are fed to a food loading station 120 and then to a sealing station 130.
  • the filling station 120 is not shown in the illustration according to FIG. 1, since this station does not differ from conventional filling stations.
  • a conventional composite cover film 132 runs into the system in the sealing station 130.
  • the cover film 132 is continuously pulled off a roll 134 and fed via deflection rolls 136, 138.
  • the sealing station 130 also has a lower support tool 140, which interacts with a sealing plate 142.
  • the sealing plate 142 can be moved upwards and downwards and is partially heated in order to bring about a thermal welding between the cover film 132 and the sealing layer 20-3 of the soft film composite 20 at the hatched areas VS in FIG. 1.
  • FIG. 10 shows the condition of the container after sealing.
  • This figure shows that the cover film 132, when the top edge flange 108 is present, nestles closely around it and is thermally welded to the soft film composite 20 in the area VS.
  • FIG. 10 shows that the cover film 132 is also designed as a composite film, a sealing layer 132-3 coming to lie opposite the sealing layer 20-3.
  • 132-2 denotes an oxygen and / or CO2 barrier layer made of ethylene vinyl alcohol (EVAL). The inside of the packaging is therefore surrounded on all sides by a composite film with a barrier layer.
  • EVAL ethylene vinyl alcohol
  • FIG. 7 shows in detail how the sealing plate 142 must be designed in order to be able to seal the container in the manner according to the invention.
  • the sealing plate has correspondingly designed depressions 144, between which flat webs 146 remain which coincide with the sealing areas VS.
  • partial heating devices 148 are provided, which can also extend into the area of the top edge flanges 108. Additional devices, such as, for example, are not shown in the illustrations.
  • these devices can of course be used with the plant according to the invention for the production and filling of the food containers.
  • the individual containers After passing through the sealing station 130, the individual containers are connected via the cover film 132 and the still connected soft film composite 20.
  • the filled and sealed containers then pass into a cutting device 150.
  • the containers are cut along lines that lie in the sealing areas VS. Such a parting plane is designated by a dash-dotted line in FIG. 10 with 152.
  • the cutting device 150 preferably has a longitudinal cutting knife 154 and a transverse cutting knife 156.
  • the containers 158 separated behind the cutting device 150 can then be removed and suitably packed.
  • FIG. 12 shows a cut cardboard strip with which a cardboard insert according to FIG. 4 can be produced. With dashed lines the fold lines are marked. The hatched areas represent the overlap areas in which the surfaces that overlap are thermally welded in order to produce a torsionally rigid spatial structure.
  • FIGS. 13, 14 An embodiment of the cardboard strip cut, with which an edge flange 108 ′ running around the top side can be produced, is shown in FIGS. 13, 14.
  • the thick lines represent the margins of the cut or cut lines.
  • the thin lines are fold lines.
  • the blank according to FIG. 13 is folded in the area of the corners, as can be seen in the perspective illustration according to FIG. 14.
  • the intermediate folding line 164 delimits an outwardly folded flap, which is preferably pivoted into a wall plane of the erected insert and is heat-welded to this surface.
  • FIG. 15 shows an overview again of a side view of the plant according to the invention for producing a food packaging. Those stations in the system that correspond to the previously described work stations are identified by identical reference numerals. In this overall view, a filling station designated 120 can be seen going beyond the representation according to FIG. The feed point of the cover film 132 can also be seen in detail.
  • the illustration according to FIG. 15 shows that the system according to the invention for producing the containers differs from a conventional packaging system only with regard to workstation 50. The other stations 30, 120, 140 and 150 can be taken over by a conventional system in identical training, if necessary with minor reconstructions.
  • FIGS. 16 to 18 show further embodiments of the invention, namely further configurations of the cardboard blank which stiffens the shell and is coated on both sides with plastic.
  • Figure 16 is a schematic plan view of an embodiment of the carton blank in the unfolded state. In Figure 16, only one half of the cardboard blank is shown. The axis of symmetry of the carton blank designated 252 is designated 254. The thin lines in FIG. 16 represent fold lines 280, which are preferably pre-embossed to allow the cardboard blank to be erected either in a separate work station or in the deep-drawn composite film in a short time.
  • Figure 17 shows the cardboard blank in the erected state.
  • the cardboard blank 252 is not formed by a cardboard strip, but by a flat structure, so that a container with a continuous bottom wall 256 is formed after erection. This makes the container more dimensionally stable, so that the wall thickness of the carton can be reduced further.
  • this design has the advantage that no uncoated area of the cardboard blank is directly exposed to the substrate to be packaged. The use of a cardboard blank according to FIGS. 16 and 17 is therefore particularly appropriate when substrates that are moist or have a higher fat content are to be packed without contamination.
  • Overlap areas of the folded wall sections are designated by 210. In these Areas are preferably punctiform or flat thermowelding, which can be achieved with simple measures due to the double-sided coating of the cardboard blank.
  • the cardboard blank according to FIGS. 16 and 17 is designed in such a way that sharp edges are avoided in the erected state.
  • Chamfer surfaces 258 are formed in the area of the corner edges, which are at an obtuse angle to the adjacent side surfaces 250. In this way, the risk of damage to the thin-walled, deep-drawn composite film is effectively countered when inserting the cardboard blank 252.
  • Figure 17 also shows that the cardboard blank is selected so that the cardboard blank opens up slightly.
  • the side walls 250 are slightly tapered upwards. This measure also effectively counteracts overstressing of the thin-walled, deep-drawn composite film either when inserting the cardboard blank and / or during the final sealing process.
  • Reference number 260 denotes a further fold line which gives the side walls 250 a locally limited flexibility in the region of the bottom edge, so that overstretching of the thermoformed composite film can also be excluded in this region.
  • the cardboard blank according to FIGS. 16 and 17 can be handled in the same way and inserted into the deep-drawn composite film trough, as has been described with reference to the exemplary embodiments described above. This method is therefore no longer to be described in connection with this embodiment.
  • the cardboard blank according to FIGS. 16 and 17 can be provided with a cut-out 262 indicated by dash-dot lines.
  • the cutting edge which arises at the edge of the punched out can be thermally sealed during the punching process, so that even in this case the inserted substrate cannot come into direct contact with the cardboard, which as a rule absorbs water.
  • FIG. 352 A further embodiment of a cardboard blank 352 is indicated in FIG.
  • the peculiarity of this cardboard blank is that the lower corner edges are flattened or blunted. Accordingly, an upper chamfer surface 358 adjoins a lower chamfer surface 368. With this configuration, the insertion of the cardboard blank 352 is further simplified, the risk of damage to the thermoformed composite film being able to be further reduced even under thermal stress.
  • FIGS. 19 and 20 show a particularly advantageous embodiment of the device for producing the container according to the invention. With this device, it is possible to integrate the units for deep-drawing the soft film and for inserting the stiffening shell into a conventional hard film packaging system in a space-saving manner and with a minimum of conversion work. Those components which are functionally comparable to components of versions already described are provided with similar reference numerals in FIGS. 19 and 20, which is increased by "400".
  • the soft film 420 runs into the molding station, ie into the deep-drawing station 430, and is heated there by means of a heating plate 432, which is located above a modular molding insert 434.
  • the thermoforming station is immediately adjacent the work station, ie the tray insertion station 450, which in turn has a modular insert 454.
  • Both modules 434 and 454 preferably have a common carrier, via which a synchronous lifting movement is initiated.
  • the common carrier can be taken over from the conventional hard film packaging system without reconstructions.
  • a transport and fixing stamp 460 for the trays or cardboard blanks 452 to be inserted cooperates with the module 454 after the module has completed its HSP working stroke and the stamp 460 has been inserted into the mold.
  • FIG. 20 shows that the transport and fixing stamp 460 has to perform a simple pivoting movement by only 90 ° in order to transport the shell inserts into the mold. This keeps the number of cycles high.
  • other kinematic devices can also be used.
  • FIG. 19 and 20 represent the conditions only schematically. Of course, it is advantageous to design the modules 434 and 454 in such a way that the bridge sections B1 and B2 become the same size, which is indicated in FIG. 20.
  • the film runs from the work station 450 with deep-drawn drawings and inserted shell inserts to a sealing and sealing station 530, in which the upper film 532 fed in via a deflection roller 538 runs in, as indicated in FIG. 15.
  • the sealing station is simplified because the sealing plate can have a simpler shape. If a top-side, angled edge flange of the cardboard blank or insert is not provided, the design of the heating devices is also simplified since they then no longer have to cover the area covered by the edge flange.
  • the device can also be modified so that the feed device for the erected carton inserts is separate from the top mold in the work station, i.e. from the form stamp.
  • the construction of the container described above results in a food packaging which, as can best be seen in FIG. 10, forms an oxygen and CO2-impermeable envelope on all sides.
  • the manufacturing process kept as simple as possible, whereby conventional packaging systems can be used with the same clock frequency and with the least possible conversion effort.
  • the invention thus creates a container for the packaging of foodstuffs, with a thermoformed shell made of plastic and a cover in the form of a plastic composite film that is welded around the top via a flange section.
  • the shell (42) is formed by a thin-walled, non-area-stable soft-film composite system (20) and on the inside at least in the region of the shell wall, which preferably has a slightly conical upward direction opens, either by means of a dimensionally stable shell insert containing cellulose or wood pulp or by a cardboard blank (52) which is plastic-coated on two sides and welded to the shell (42) at least at discrete points (118).

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Claims (45)

  1. Récipient pour emballer des vivres, comprenant une coupe embouti ayant un système de feuille douce en matière plastique à paroi mince qui n'est pas stable de soimeme, et une couverture en forme d'une feuille composite en matière plastique qui est soudée périphériquement avec ledit récipient à la surface supérieure par un segment de bride, caractérisé en ce que le système de feuille douce est un système composite de feuille douce, lequel est renforcé à toute la face interne dans la zone de la paroi de la coupe, laquelle est ouverte vers le haut de préférence en cône douce, par
    a) un insert de la coupe indéformable comprenant une pâte méchanique ou de cellulose
    ou
    b) un coupon de carton (52) couchée sur les deux faces aux matières plastiques et soudée avec la coupe (42) au moins à des endroits discrets (118), laquelle est obtenue d'un coupon (81-1 à 86-4; 152; 352) comportant un pliage (80; 260; 280) adapté au contour intérieur de la coupe (42) et laquelle a une structure stable par le soudage des sections de pliage (110; Ü; 210) choisies chevauchant dans la forme finie pliée,
    ledit renforcement couvrant au moins une zone partielle du fond de la coupe.
  2. Récipient selon la revendication 1, caractérisé en ce que le coupon de carton (52) est obtenu d'un coupon (81-1 à 86-4) en forme de ruban, lequel est mis en une structure de colette spatialement stable par soudage des sections de pliage (110; Ü; 210) choisies chevauchant dans la forme finie pliée.
  3. Récipient selon la revendication 1, caractérisé en ce que le coupon de carton (252) ou l'insert de la coupe présente un fond continu (256).
  4. Récipient selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le système composite de feuille douce (20) de la coupe (42) est constitué par une feuille composite (20) à plusieurs couches comportant une couche extérieure (20-1), qui peut porter des charges méchaniques, une couche d'arrêt d'oxygène et de CO2 (20-2) ainsi qu'une couche de scellement intérieure (20-3).
  5. Récipient selon la revendication 4, caractérisé en ce que la couche extérieure (20-1) est constituée par une matière plastique en PA, une matière plastique en polyéthylène (PE) préconditionnée, par exemple traitée par effet corona, à point de fusion haut, une matière plastique en polyester ou une matière plastique en polypropylène.
  6. Récipient selon la revendication 4 ou 5, caractérisé en ce que la couche d'arrêt (20-2) est constituée par un alcool de vinyle d'éthylène (EVOH).
  7. Récipient selon l'une quelconque des revendications 4 à 6, caractérisé en ce que la couche de scellement (20-3) est constituée par une matière plastique en polyéthylène (PE) de préférence pelable.
  8. Récipient selon l'une quelconque des revendications 2 à 7, caractérisé en ce que le coupon de carton (52) ou l'insert de la coupe revêt complètement la paroi de la coupe (42-1) et présente une bride de fond (102) repliée en dedans.
  9. Récipient selon la revendication 8, caractérisé en ce que la bride de fond (102) a une largeur faisant entre 5 et 40 % de la largeur du récipient (W).
  10. Récipient selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le coupon de carton (52) ou l'insert de la coupe comprend à la face supérieure une bride marginale (108; 108') périphérique repliée à dehors.
  11. Récipient selon la revendication 10, caractérisé en ce que la bride marginale (108; 108') a une largeur (B108) faisant entre 2 et 10 mm, de préférence 5 mm.
  12. Récipient selon l'une quelconque des revendications 1 à 11, caractérisé en ce que le revêtement en matière plastique (52-2) du coupon de carton (52) est constitué par une matière plastique en polyéthylène (PE) qui est soudable thermiquement.
  13. Récipient selon l'une quelconque des revendications 1 à 12, caractérisé en ce que la feuille douce (20) a une épaisseur (D20) faisant entre 150 et 200 um.
  14. Récipient selon l'une quelconque des revendications 1 à 13, caractérisé en ce que le coupon de carton (52; 252; 352) ou l'insert de la coupe a un grammage entre 200 et 300 g/m2.
  15. Récipient selon l'une quelconque des revendications 1 à 14, caractérisé en ce que la couche aux matières plastiques (52-2) du coupon de carton (52) a une épaisseur entre environ 10 et 15 um.
  16. Récipient selon l'une quelconque des revendications 1 à 15, caractérisé en ce que le coupon de carton (52; 252; 352) comporte comme support (52-1) un carton obtenu des produits récuperés.
  17. Récipient selon l'une quelconque des revendications 1 à 16, caractérisé en ce que la couche aux matières plastiques (52-2) du coupon de carton (52; 252; 352) est formée sans résidu d'une matière synthétique, de préférence sur la base de polyéthylène, laquelle est pelable du renforcement adjacent.
  18. Récipient selon l'une quelconque des revendications 1 à 17, caractérisé en ce que des additifs, comme l'acétate de circonium, sont ajoutés à la masse des fibres de l'insert de la coupe pour améliorer la résistance à l'humidité.
  19. Procédé pour fabriquer un récipient des vivres auquel une feuille en matière plastique est mise en forme de la coupe dans un moyen à mouler et la coupe est remplie des vivres et alors est jointe étanchement aux gaz par une feuille de scellement à la péripherie d'une bride supérieure de la coupe, le cas échéant après exécutant une étape de prodédé d'évacuation et/ou de traitement du gaz protecteur, caractérisé en ce qu'
    a) un insert renforcant la feuille plastique (20) au moins dans la région des parois (42-1) et dans la zone de transition au fond de la coupe (42-2) est inséré dans la coupe (42) composé d'un système de feuille plastique douce embouti à paroi mince ou en forme d'un insert de la coupe indéformable comportant une pâte méchanique ou de cellulose ou en forme d'un coupon de carton (52; 252; 352) couché sur les deux faces aux matières plastiques, et que
    b) l'insert de la coupe ou le coupon de carton (52; 252; 352) est fortement joint, de préférence par effet thermique, ou soudé à la feuille plastique (20) de manière que le paroi et au moins une partie du fond de la coupe sont renforcés.
  20. Procédé selon la revendication 19, caractérisé en ce que l'insert de la coupe ou le coupon de carton (52; 252; 352) est inséré ainsi que relié à la feuille plastique (20) dans une seule et même position (50) de travail, l'insert de la coupe ou le coupon de carton (52; 252; 352) de préférence étant inséré en état préformé et plié, c'est à dire monté, dans la feuille plastique (42) mise en forme de la coupe.
  21. Procédé selon la revendication 20, caractérisé en ce que le coupon de carton (52; 252; 352) est formé d'un coupon (86-1 à 86-4; 252; 352) lequel comporte un pliage correspondant au contour intérieur de la feuille plastique (42) mise en forme de coupe et est mise en une structure stable après le pliage par la jonction, notamment le soudage des sections repliées (110; Ü; 210) choisies lesquelles chevauchent dans la forme finie pliée.
  22. Prodédé selon la revendication 20, caractérisé en ce que le coupon de carton est formé d'un coupon (86-1 à 86-4) en forme de ruban, lequel comporte un pliage correspondant au contour intérieur de la feuille plastique (42) mise en forme de coupe et est mise en une structure de collet stable comprenant au fond des tranches ouvertes après le pliage par la jonction, notamment le soudage des sections repliées (110; Ü) choisies lesquelles chevauchent dans la forme finie pliée.
  23. Procédé selon la revendication 21 ou 22, caractérisé en ce que le coupon de carton (52; 252; 352) est inséré dans la feuille plastique (42) mise en forme de coupe, après que les sections repliées (110; Ü; 210) choisies, lesquelles chevauchent dans la forme finie pliée, ont été fortement jointes l'une à l'autre.
  24. Procédé selon l'une quelconque des revendications 18 à 23, caractérisé en ce que l'insert de la coupe ou le coupon de carton (52; 252; 352) est endenté à la paroi opposée de la feuille plastique (20) mise en forme de coupe au moins dans la région des parois latérales (42-1).
  25. Procédé selon l'une quelconque des revendications 18 à 24, caractérisé en ce que l'auge (42) mise en forme de coupe de la feuille plastique (20) est stabilisée par un courant d'air (106) pendant que l'insert de la coupe ou le coupon de carton (52; 252; 352) est inséré.
  26. Procédé selon la revendication 25, caractérisé en ce que le courant d'air (106) est dirigé vers l'intérieur de l'auge (42) emboutie par un orifice (100) au fond de l'insert de la coupe ou de le coupon de carton (52) obtenu et monté d'un ruban de carton.
  27. Dispositif à fabriquer un récipient de vivres, comportant un poste de moulage à former une auge dans une feuille plastique amenée au poste de moulage (30) ainsi qu'un poste de scellement (140) relié à un poste de remplissement des vivres (120), caractérisé en ce que devant le poste de remplissement des vivres (120) un poste de travail (50) est relié, dans lequel un insert de la coupe renforcant la feuille plastique (20) au moins dans la zone des parois (42-1) et dans la zone de transition au fond de la coupe (42-2) ou un coupon de carton (52; 252; 352) couché aux matières plastiques sur les deux faces est inséré dans la coupe (42) avant que celle-ci est remplie, et l'insert de la coupe ou le coupon de carton (52) est fortement joint, de préférence relié sous l'effet thermique, par exemple soudé thermiquement, à la feuille plastique (20) dans des zones (118) choisies de manière que le renforcement couvre au moins le paroi ainsi qu'une section du fond de la coupe.
  28. Dispositif selon la revendication 27, caractérisé en ce que le poste de travail (50) comporte un moule négatif inférieur (54) recevrant à engagement positif la feuille plastique (42, 20) en forme d'auge et un moule positif supérieur (66) adapté à être mis en position opposée alignée au-dessus dudit moule négatif, l'insert de la coupe ou le coupon de carton (52;252; 352) étant adapté, lorsque le moule est fermé, à être pressé contre toute la surface de la feuille plastique (42, 20) et à être fortement relié à la feuille par le chauffage au moins partiel du moule négatif (54).
  29. Dispositif selon la revendication 27 ou 28, caractérisé en ce que dans le moule positif supérieur (66) un système des conduits (104) est formé, à travers duquel, lors d'une approximation au moule négatif, un courant de fluid (106) stabilisant la feuille plastique (42) en forme d'auge peut etre dirigé vers la feuille plastique (42).
  30. Dispositif selon l'une quelconque des revendications 27 à 29, caractérisé en ce que les deux demi-moules (66, 54) du poste de travail peuvent être mûs verticalement.
  31. Dispositif selon l'une quelconque des revendications 27 à 30, caractérisé en ce que le moule positif (66) est formé comme moyen de transport (60, 62) pour l'insert de la coupe ou pour le coupon de carton (52).
  32. Dispositif selon la revendication 31, caractérisé en ce que le moyen de transport (60, 62) peut aller et venir entre le poste de travail (50) et un poste de pliage (70) dans lequel le coupon de carton (52; 252; 352) est monté.
  33. Dispositif selon la revendication 32, caractérisé en ce que le poste de pliage (70) comporte un moyen de chauffage (84) pour souder des sections repliées (110; Ü; 210) chevauchant en forme finie pliée et montée.
  34. Dispositif selon l'une quelconque des revendications 31 à 33, caractérisé en ce que le moule positif (66) recoit dans la zone des faces latérales (98) opposées à la paroi (42-1) de l'auge une série des pistons (90) essentiellement en forme de nervure, lesquels s'étendent à distances parallèles en substance perpendiculaire sur les bords horizontals du moule positif (66) et sont adaptés à être mis d'une position noyée à une position saillante par commande d'un fluide sous pression (94).
  35. Dispositif selon la revendication 34, caractérisé en ce que les pistons (90) en forme de nervure sont opposés, lorsque le moule composé du moule positif (66) et du moule négatif (54) est fermé, aux cavités (116) correspondants formés dans les parois latérales du moule négatif (54), dans lesquels l'insert de la coupe ou le coupon de carton (52; 252; 352) peut être deformé avec la feuille plastique (20) insérée.
  36. Dispositif selon la revendication 34 ou 35, caractérisé en ce que les pistons (90) en forme de nervure sont appuyés d'une manière élastique.
  37. Dispositif selon l'une quelconque des revendications 29 à 36, caractérisé en ce que les parois latérales (114) et les sections de bord adjacentes du moule négatif (54) sont munies d'un moyen de chauffage (112).
  38. Dispositif selon l'une des revendications 27 à 37, caractérisé en ce que le poste de travail (50) en même temps constitue le poste de moulage de la feuille plastique (20).
  39. Dispositif selon l'une des revendications 27 à 38, caractérisé en ce que le poste de moulage (30) comporte un outillage d'emboutissage profond (34), dans lequel la feuille plastique (20) peut être tirée après un préchauffage propre à l'aide de pression.
  40. Dispositif selon l'une des revendications 27 à 39, caractérisé en ce que chaque poste du dispositif est constitué de facon qu' un groupe des récipients peut être transformé, couché et achevé en une seule opération.
  41. Dispositif selon l'une des revendications 27 à 40, caractérisé en ce que les récipients sont transportés à travers le dispositif étant cohérents par la feuille plastique (20), et en ce que un moyen de séparation (150), auquel les récipients (156) individuels sont séparés, est lié en arrière du poste de scellement (130).
  42. Dispositif selon l'une quelconque des revendications 27 à 41, caractérisé en ce que le poste de scellement (130) comporte une plaque à sceller (142) chauffée, dont le relief et/ou le moyen de chauffage (148) est adapté à la forme des inserts de la coupe ou des coupons de cartons (52; 252; 352) insérés de manière que le scellement entre la feuille plastique (20) et une feuille de recouvrement (132) est effectué hermétiquement à toute la périphérie par la soudure au dehors de l'insert de la coupe ou le coupon de carton.
  43. Dispositif notamment selon l'une quelconque des revendications 27 à 42, caractérisé en ce que le poste de moulage (430) et/ou le poste de travail (450) comportent des modules interchangeables.
  44. Dispositif selon la revendication 43, caractérisé en ce que le module (430) du poste de moulage en substance comporte les dimensions du moyen de chauffage d'un système d'emballage aux feuilles dures.
  45. Dispositif selon la revendication 43 ou 44, caractérisé en ce que les modules ont en substance des dimensions pareilles.
EP92919580A 1991-09-17 1992-09-17 Recipient pour l'emballage de produits alimentaires, et procede et dispositif de fabrication d'un tel recipient Expired - Lifetime EP0604507B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4130905A DE4130905A1 (de) 1991-09-17 1991-09-17 Behaelter fuer die verpackung von lebensmitteln, verfahren zur herstellung eines solchen behaelters und vorrichtung zur durchfuehrung dieses verfahrens
DE4130905 1991-09-17
DE4218998A DE4218998A1 (de) 1991-09-17 1992-06-10 Behälter für die Verpackung von Lebensmitteln, Verfahren zur Herstellung eines solchen Behälters und Vorrichtung zur Durchführung dieses Verfahrens
DE4218998 1992-06-10
PCT/EP1992/002148 WO1993006016A1 (fr) 1991-09-17 1992-09-17 Recipient pour l'emballage de produits alimentaires, et procede et dispositif de fabrication d'un tel recipient

Publications (2)

Publication Number Publication Date
EP0604507A1 EP0604507A1 (fr) 1994-07-06
EP0604507B1 true EP0604507B1 (fr) 1996-06-05

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EP92919580A Expired - Lifetime EP0604507B1 (fr) 1991-09-17 1992-09-17 Recipient pour l'emballage de produits alimentaires, et procede et dispositif de fabrication d'un tel recipient

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EP (1) EP0604507B1 (fr)
AT (1) ATE138865T1 (fr)
WO (1) WO1993006016A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20010045A1 (it) * 2001-01-30 2002-07-30 Ipack S R L Contenitore per alimenti e relativo motodo di realizzazione
US9119450B2 (en) 2012-12-21 2015-09-01 Novartis Ag Contact lens package
FR3112530B1 (fr) * 2020-07-17 2023-01-13 Sipalax 2 Barquette destinée à contenir une denrée alimentaire de type hamburger

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1133947A (en) * 1965-04-30 1968-11-20 Hassia Verpackung Ag Improvements in or relating to packaging containers and methods and apparatus for production thereof
FR2404567A1 (fr) * 1977-10-03 1979-04-27 Impression Cartonnage Ste Pari Emballage en carton revetu de matiere synthetique
US4257530A (en) * 1978-07-27 1981-03-24 Champion International Corporation Lined tray
FR2480708A1 (fr) * 1980-11-07 1981-10-23 Impression Cartonnage Ste Pari Contenant en carton plie revetu d'une pellicule en matiere synthetique et muni d'un cadre peripherique en une seule piece ainsi que son procede de fabrication

Also Published As

Publication number Publication date
EP0604507A1 (fr) 1994-07-06
ATE138865T1 (de) 1996-06-15
WO1993006016A1 (fr) 1993-04-01

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