WO2022107181A2 - Processus de production de plateau alimentaire et plateau ainsi produit - Google Patents

Processus de production de plateau alimentaire et plateau ainsi produit Download PDF

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Publication number
WO2022107181A2
WO2022107181A2 PCT/IT2021/050377 IT2021050377W WO2022107181A2 WO 2022107181 A2 WO2022107181 A2 WO 2022107181A2 IT 2021050377 W IT2021050377 W IT 2021050377W WO 2022107181 A2 WO2022107181 A2 WO 2022107181A2
Authority
WO
WIPO (PCT)
Prior art keywords
tray
cardboard
production process
perimeter edge
edge flange
Prior art date
Application number
PCT/IT2021/050377
Other languages
English (en)
Other versions
WO2022107181A3 (fr
Inventor
Simone Giacomo COCCHETTI
Original Assignee
Lic Packaging S.P.A
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lic Packaging S.P.A filed Critical Lic Packaging S.P.A
Priority to EP21827820.8A priority Critical patent/EP4255725A2/fr
Publication of WO2022107181A2 publication Critical patent/WO2022107181A2/fr
Publication of WO2022107181A3 publication Critical patent/WO2022107181A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/44—Folding sheets, blanks or webs by plungers moving through folding dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/59—Shaping sheet material under pressure
    • 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
    • B65D21/00—Nestable, stackable or joinable containers; Containers of variable capacity
    • B65D21/02—Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together
    • B65D21/0233—Nestable containers
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/20—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
    • B65D5/24—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with adjacent sides interconnected by gusset folds
    • B65D5/244—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with adjacent sides interconnected by gusset folds and the gussets folds connected to the outside of the container body
    • B65D5/246—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with adjacent sides interconnected by gusset folds and the gussets folds connected to the outside of the container body the container body comprising a continuous rim or flange
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/40—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper specially constructed to contain liquids
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/4279—Joints, seams, leakproof joints or corners, special connections between panels
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
    • B31B2100/002—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed
    • B31B2100/0024—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed having all side walls attached to the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2120/00—Construction of rigid or semi-rigid containers
    • B31B2120/40—Construction of rigid or semi-rigid containers lined or internally reinforced
    • B31B2120/402—Construction of rigid or semi-rigid containers lined or internally reinforced by applying a liner to already made boxes, e.g. opening or distending of the liner or the box
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/142—Cutting, e.g. perforating, punching, slitting or trimming using presses or dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/25—Surface scoring
    • B31B50/252—Surface scoring using presses or dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/62—Uniting opposed surfaces or edges; Taping by adhesives
    • B31B50/624—Applying glue on blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/88—Printing; Embossing

Definitions

  • the invention relates to the packaging sector of food products for human consumption. More specifically, the invention relates to a production process for a food tray which is particularly (but not exclusively) suitable for use in controlled atmosphere packaging.
  • a shaped tray for foodstuff packaging, comprising a bottom, raised side walls and a perimeter edge flange, adapted to define a compartment for containing food.
  • Said perimeter edge flange is normally a flange with a horizontal edge turned towards the outside of the containment compartment, and necessary for attaching a lid or a sealing film.
  • a flat, step-free flange needs to be used, so that the sealing film can be sealed along the entire length of the circumferential flange.
  • thermoforming a sheet of plastic.
  • the thermoforming process requires a sheet of plastic to be heated and pushed into a mould, and then cooled so that it maintains a tray shape over time. After being filled with food, the tray is hermetically sealed using a sealing film.
  • thermo-adhesive substance to areas of said sheet
  • thermoadhesive substance
  • the side walls and perimeter edge flange of the tray have overlapping parts, which are stuck together to keep the sheet of cardboard folded in the shape of the tray.
  • These overlapping parts create steps and areas with different thicknesses that, especially along the perimeter edge flange to which the sealing film will later be attached, cannot guarantee successful sealing of the compartment and therefore hermetic sealing of the tray.
  • the present invention aims to overcome these drawbacks, by providing a production process for a food tray that is effective, quick and economical.
  • Another aim is to provide a food tray that is air-tight and water-tight, where attachment of the sealing film is reliable and safe, and to provide a tray that is economical, sturdy, can be stacked, and is not bulky.
  • thermo-adhesive substance to areas of said sheet
  • thermo-adhesive substance to form a shaped tray, comprising a bottom, side walls and a perimeter edge flange, adapted to define a compartment for containing food;
  • said cardboard is a corrugated cardboard
  • said production process comprises the phase of mechanically pressing at least said perimeter edge flange so as to crush said corrugated cardboard and flatten said flange, making its surface flat even at the flaps of overlapping cardboard.
  • said mechanical pressing of said flange takes place at the same time as said folding of said die-cut sheet or subsequent to the shaping of the tray.
  • said mechanical pressing of said perimeter edge flange comprises the phase of exerting a differentiated pressure along said perimeter edge flange, maximum at the flaps of overlapping cardboard and minimum or not at all on the remaining portions.
  • said mechanical pressing of said perimeter edge flange comprises the use of a die-type mould and a punch adapted to compress at least said perimeter edge flange, where the residual distance between punch and die, when said mould is in the closed position, is selected based on the thickness of said corrugated cardboard.
  • said residual distance between punch and die is less than or equal to the thickness of said corrugated cardboard.
  • said production process comprises the phase of creating on said tray, by means of said mechanical pressing, a side-skirt, in other words an edge folded downwards, projecting from said perimeter edge flange, and orthogonal thereto.
  • said production process comprises the phase of creating on said tray discontinuous protruding structures, adapted to act as spacing means between adjacent stacked trays.
  • said phase of die-cutting said cardboard sheet comprises the phase of making cuts, delimiting areas belonging to said perimeter edge flange, where said areas have an open outline, and said phase of forming said tray comprises the phase of folding the portions of cardboard defined by said cuts to create support teeth.
  • said phase of making cuts delimiting areas with an open outline involves four areas of the die-cut cardboard sheet, located at the four corners of said perimeter edge flange.
  • said phase of folding said diecut cardboard sheet comprises the phase of deforming defined portions of said bottom and/or said side walls, according to at least two sets of positions, to create bosses in non-corresponding positions between said two sets.
  • said phase of folding said die-cut cardboard sheet comprises the phase of deforming at least one defined portion on at least two opposing side walls of said tray near said bottom or near said perimeter edge flange.
  • said production process comprises the phase of applying a film of plastic material to the inner surface of the containment compartment of said tray and on said perimeter edge flange.
  • said corrugated cardboard comprises at least one sheet of baking paper turned towards said containment compartment of said food tray.
  • a further object of the invention is a food tray obtained using a production process as claimed.
  • the invention offers several advantages.
  • the flat shape of the perimeter edge flange of the tray is a fundamental characteristic for making the tray, when covered by sealing film, at least air-tight and water-tight, and gas-tight in the presence of nitrogen and an internal film of plastic material.
  • the compressibility of the corrugated cardboard together with the step of pressing the perimeter edge flange makes it possible to obtain this flatness, thereby eliminating the steps created by the overlapping of flaps of cardboard when forming the tray.
  • Pressing of the perimeter edge flange is not uniform along the flange, but is advantageously differentiated: it is clear that where the flaps are overlapping, and therefore where there is a double layer of corrugated cardboard, the pressure exerted will be greater than on those portions of the flange consisting of only a single layer of corrugated cardboard.
  • the pressure on the overlapping flaps of the flange needs to be at a maximum, while around the more central portions of the flange consisting of only a single layer of corrugated cardboard the pressure to be exerted needs to be zero, or minimal, the residual distance between punch and die will be at a maximum equivalent to the thickness of the corrugated cardboard.
  • the presence of the side-skirt also gives dimensional and structural stability to the tray, and particularly to the perimeter edge flange.
  • said perimeter edge flange could tend disadvantageously to bend during subsequent steps to apply the thermo-shrinking sealing film: said side-skirt lends stiffness to the flange and helps prevent its deformation.
  • the side-skirt whose flaps on the die extend beyond those of the flange, make it possible to absorb any small errors in positioning the die under the mould, thereby guaranteeing a flange with a constant width, and flatness, thus making it possible to obtain a welding surface for the tray sealing film that is always sufficient for the purpose, and a constant tray size.
  • the sheet of baking paper forming at least one face of the corrugated cardboard, the face that when in use constitutes the inner surface of the tray, offers the possibility to use the tray as an instrument for cooking and/or heating, both in traditional ovens and in microwave ovens, and also allows consumption of the food directly from the tray.
  • the pressing phase may occur either in line, during the tray production process, while it is being formed, or subsequently, with the tray already formed, prior to it being filled.
  • a further advantage of the solution according to the invention is that the tray obtained is created to be easily stackable in a nested manner, without the risk of interference in the stack of trays during storage and transport.
  • Each single tray can be easily taken from the stack, thereby allowing the use of a reliable automated process with a tray filling and packaging machine, thus reducing both the number of possible jamming situations and process execution times.
  • the protruding discontinuous structures create spacers and support points for adjacent trays stacked one on top of the other.
  • the unaligned and staggered arrangement of the protruding discontinuous structures means that, during tray production phases and during subsequent packaging phases, when the trays are stored in stacks, if they are placed one on top of the other, they are not compacted together, but rather a distance is maintained between them that is useful for the grippers of machines for picking up each individual tray.
  • the protruding discontinuous structures obtained by deformation of defined portions of the tray, and therefore without cuts and openings on the corrugated cardboard, make the tray integral in all its parts, and not subject to possible leaks of liquids and/or pieces of food.
  • the integrity of the tray guarantees additional safety by removing the risk of access to the contents and tampering with the foodstuff.
  • Figures 1 and 2 show an axonometric view from above and below, respectively, of a food tray obtained using the production process according to a variant of the invention
  • Figures 3 and 4 show a transversal cross-section of a detail of Figure 1 , with proportions altered for clarity of representation, during two phases of the production process;
  • Figures 5 and 6 a side view and an axonometric view from below, of the food trays shown in Figure 1 stacked on top of each other;
  • Figure 7 shows an overhead plan view of an open die-cut sheet of the food tray shown in Figure 1 , during a phase of the production process according to a variant of the invention
  • Figure 8 shows an overhead plan view of a food tray obtained using the production process according to a variant of the invention.
  • Figure 9 a cross-section along a vertical plane of the food trays according to the variant shown in Figure 8 stacked on top of each other;
  • Figures 10 and 11 show an overhead schematic axonometric view and a detailed vertical cross-section view, respectively, of a food tray obtained using the production process according to a further variant of the invention
  • Figure 12 shows an overhead plan view of an open die-cut sheet of the food tray shown in Figure 10, during a phase of the production process.
  • FIG. 1 -7 there is shown a cardboard food tray 1 obtained by means of a production process according to a possible variant of the invention.
  • Said tray 1 has a box-like shape with a substantially rectangular design, and comprises a bottom 5, four raised side walls 6 projecting from said bottom 5 that define a compartment 8 for containing food, and a perimeter edge flange 7 extending horizontally on the outside of said containment compartment 8. It is clear that said tray 1 can also have a different shape, with a polygonal or circular design.
  • Said perimeter edge flange 7 is used, during the actual process of packaging food products inside the tray 1 , for applying a sealing film (not illustrated) adapted to act as a lid for said tray 1 , for example by heat-sealing or gluing.
  • the production process involves the use of a sheet 2 of corrugated cardboard.
  • various types of paper can be used to produce the sheets of corrugated cardboard.
  • thermo-adhesive substance glue or heat-reactive paint
  • glue or heat-reactive paint glue or heat-reactive paint
  • a fundamental phase of the production process involves the diecutting of the sheet 2 of cardboard according to a defined outline (Fig. 7) and the creation of creases 3 that define the folding lines for the components that will form the tray 1 (bottom 5, side walls 6, perimeter edge flange 7).
  • the die-cut sheet 4 which will be used to create a tray with a rectangular design, comprises areas corresponding to the bottom 5, to the four side walls 6, to the portions of perimeter edge flange 7, and to four connecting corner areas 13.
  • the die-cut sheet 4 of cardboard ( Figure 12) also comprises end flaps 16 that, when the tray 1 is assembled, will create a side-skirt 17, in other words a downward folded edge, projecting from said perimeter edge flange 7 and orthogonal thereto.
  • said die-cutting phase also comprises the phase of making cuts 10, at the portions of the four connecting corner areas 13 which will go to make up said perimeter edge flange 7, having an open C-shape outline. Said cuts 10 will create discontinuous structures protruding from said perimeter edge flange 7, useful for keeping the trays 1 raised and separated from each other when nested to form a stack 9.
  • the actual phase of forming the tray 1 first of all involves the phase of folding said die-cut sheet 4 along said creases 3 overlapping it in part.
  • said die-cut sheet 4 comprises flaps 14 of corrugated cardboard from the flange 7, adapted to overlap reinforcing structure 15 for joining the perimeter edge flange 7, and flaps 14’ of corrugated cardboard adapted to overlap one another to join the side walls 6.
  • thermo-adhesive substance previously applied to the sheet 2 of cardboard allows the flaps 14’, and the flaps 14 overlapping the reinforcement structures 15, to remain joined to one another thereby giving the tray 1 its box-like shape.
  • Said phase of forming said tray 1 also comprises the phase of folding the portions of cardboard defined by said cuts 10. Said portions of folded cardboard thus appear as teeth 11 , projecting from the perimeter edge flange 7, and acting as a support for the tray 1 when stacked.
  • FIGS 5 and 6 illustrating a plurality of stacked trays 1 , there are four such cuts 10 and they are located in end areas of the reinforcement structures 15 of the connecting corner portions 13 of the die-cut sheet 4, which will go to make up the four corners of said perimeter edge flange 7.
  • the sealing film may be applied on the flange 7 externally with respect to said teeth 11 or, should a water-tight or air-tight seal be required, the teeth 11 may be positioned externally with respect to the weld perimeter of the sealing film.
  • the main phase of the tray 1 production process characterising the invention is shown schematically in Figures 3 and 4, and consists of the mechanical pressing at least of said perimeter edge flange 7, so as to crush said corrugated cardboard and flatten said perimeter edge flange 7 and make its surface flat even at the flaps 14 of cardboard overlapping the reinforcement structures 15.
  • the thickness of the corrugated cardboard wave offers a space to allow differential yielding between the single-layer portion of perimeter edge flange 7 and the double-layer portion created by the overlapping flaps 14, in order to equalize the final thickness of both layers and thus obtain a flat perimeter edge flange 7 without steps.
  • Said mechanical pressing of said perimeter edge flange 7 therefore comprises exertion of a differentiated pressure along said perimeter edge flange 7, maximum at the flaps of overlapping cardboard and minimum or not at all on the remaining portions, in other words those single-layer portions of corrugated cardboard.
  • Said mechanical pressing of said perimeter edge flange 7 comprises the use of a die-type mould and a punch adapted to compress said die-cut sheet 4 at least on said perimeter edge flange 7 and possibly on said side-skirt 17.
  • the differentiated pressure on the flange can be obtained through the correct choice of residual distance between the mould punch and die, when said mould is in the closed position.
  • said residual distance between die and punch is selected based on the thickness of said corrugated cardboard 4 and is equivalent at a maximum to the thickness of said corrugated cardboard.
  • Said mechanical pressing of said perimeter edge flange 7 may occur at the same time as said phase of folding said die-cut sheet 4 and forming the tray 1 or subsequent to formation of the tray 1 , during a pre-packaging phase.
  • the production process according to the invention may also comprise an additional phase of internal lining of the tray 1 with a film of plastic material (not shown).
  • This application renders the tray 1 impermeable and air-tight, and is chosen preferably in the case of packaging in a protective atmosphere, where a gas mixture is introduced into the tray 1 before the sealing film is applied, in order to increase and prolong the conservation of food.
  • Said phase of applying said film in plastic material involves both the inner surface of the containment compartment 8 of said tray 1 , and said perimeter edge flange 7.
  • the sealing film covering the tray 1 will be heat-sealed onto the film in plastic material along said perimeter edge flange 7.
  • the production process that is the object of the invention comprises working phases that can be carried out in sequence on a production line machine, or in a discontinuous manner with separate phases and different machines.
  • a particularly advantageous possibility offered by the process according to the invention is the possibility of simultaneously conducting the phase of forming the tray 1 and the phase of pressing at least the perimeter edge flange 7 (and possibly the side-skirt 17 when present), so as to be able to provide a food packaging company with a tray that is ready to be filled and sealed, without giving the company the burden of pressing the perimeter edge flange prior to sealing with the covering sealing film.
  • the simultaneous phases of forming the tray 1 and pressing at least said perimeter edge flange 7 are carried out by a single die-type mould and punch, appropriately sized and calibrated to exert greater pressures in specific areas of the flange without damaging the other zones of the die-cut sheet 4.
  • the process differs from the one described above only in terms of the phases of creating the discontinuous protruding structures adapted to act as spacing means for the stacked trays 1 .
  • Said discontinuous protruding structures do not involve making an opening in the corrugated cardboard but only a localized deformation. This deformation, without breakage, is also possible due to the compression capacity of the corrugated cardboard.
  • the production process envisages that, during the phase of folding and forming the tray 1 , there is included a phase of locally deforming defined portions of said bottom 5 and/or said side walls 6, by means of pressure, to form bosses 12.
  • Said bosses 12 can be achieved by means of relief or depression moulding, depending on whether the bosses 12 protrude on the inside or outside of the tray, guaranteeing a continuity of material and ease of production.
  • Said bosses 12 can be arranged alternatively along said side walls 6 near said bottom 5 or near said perimeter edge flange 7, close to the creases 3.
  • bosses 12 appear as structures projecting towards the inside of the tray 1 , but nothing prevents the creation of bosses 12 protruding towards the outside of the tray 1 .
  • a boss 12 could be located on each side wall 6.
  • the bosses 12 between adjacent trays 1 need to have different, staggered positions, i.e. non-corresponding positions.
  • the production process envisages using localised pressure to deform bosses 12 on said bottom 5 and/or said side walls 6 according to at least two sets of positions, to be carried out on two separate die-cut sheets 4, to create two trays 1 with protruding discontinuous structures 10 that are respectively staggered and non-corresponding with one another.
  • the corrugated cardboard chosen and the production process that is the object of the invention also make it possible to create an eco-friendly tray 1 , with recyclable paper, and in some variants even entirely biodegradable, with consequent benefits for the environment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Making Paper Articles (AREA)
  • Cartons (AREA)
  • Table Equipment (AREA)
  • Stackable Containers (AREA)
  • General Preparation And Processing Of Foods (AREA)

Abstract

L'invention concerne le secteur du conditionnement de produits alimentaires à des fins de consommation humaine. Plus particulièrement, l'invention concerne un processus de production d'un plateau alimentaire particulièrement (mais pas exclusivement) approprié pour une utilisation à des fins de conditionnement en atmosphère contrôlée, et le plateau ainsi obtenu. Ledit processus de production d'un plateau alimentaire en carton (1) comprend les phases consistant à : - utiliser une feuille (2) de carton, ledit carton étant ondulé ; - appliquer une substance thermo-adhésive à des zones de ladite feuille ; - découper à l'emporte-pièce et créer des plis (3) sur ladite feuille (2) ; - plier ladite feuille découpée à l'emporte-pièce (4) le long desdits plis (3) et amener les rabats de carton précédemment enduit d'adhésif à se chevaucher et appliquer une source de chaleur pour réactiver ladite substance thermo-adhésive, pour former un plateau mis en forme (1), comprenant un fond (5), des parois latérales (6) et un rebord de bord périphérique (7), apte à définir un compartiment (8) destiné à contenir des aliments ; - positionner ledit plateau (1) à la suite d'autres plateaux (1) déjà formés pour créer un empilement (9) de plateaux stockés. Ledit processus consiste également à presser mécaniquement au moins ledit rebord de bord périphérique (7), de manière à écraser ledit carton ondulé et à aplatir ledit rebord de bord périphérique (7), aplatissant sa surface même au niveau des rabats de carton se chevauchant.
PCT/IT2021/050377 2020-11-23 2021-11-19 Processus de production de plateau alimentaire et plateau ainsi produit WO2022107181A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21827820.8A EP4255725A2 (fr) 2020-11-23 2021-11-19 Processus de production de plateau alimentaire et plateau ainsi produit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102020000027980 2020-11-23
IT102020000027980A IT202000027980A1 (it) 2020-11-23 2020-11-23 Procedimento di produzione di una vaschetta per alimenti e relativa vaschetta

Publications (2)

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WO2022107181A2 true WO2022107181A2 (fr) 2022-05-27
WO2022107181A3 WO2022107181A3 (fr) 2022-08-04

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Country Link
EP (1) EP4255725A2 (fr)
IT (1) IT202000027980A1 (fr)
WO (1) WO2022107181A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4286288A1 (fr) * 2022-05-31 2023-12-06 Stackpack B.V. Plateau en carton

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL160217C (nl) * 1968-05-07 1979-10-15 Sprinter Pack Ab Verpakking, bestaande uit een door een deksel afsluitbaar kartonnen bakje.
SE354033B (fr) * 1971-07-09 1973-02-26 Mo Och Domsjoe Ab
FR2194612B2 (fr) * 1972-08-02 1975-02-07 Baudet Marcel
SE395865B (sv) * 1975-04-03 1977-08-29 Sprinter Pack Ab Kartongtrag med lock
US5577989A (en) * 1994-06-20 1996-11-26 Newark Group Industries, Inc. Method for forming corrugated paper container and container made therefrom
DE20201817U1 (de) * 2002-02-06 2002-05-08 Offsetdruckerei Caesar Gmbh & Schalenförmige Verpackung mit hitzebeständiger Trennschicht
US20060213962A1 (en) * 2005-03-22 2006-09-28 Novacart S.P.A. Tray for foodstuffs
GB201901600D0 (en) * 2019-02-05 2019-03-27 Dutton Robert Edward Graham Containers for baking

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4286288A1 (fr) * 2022-05-31 2023-12-06 Stackpack B.V. Plateau en carton
WO2023232485A1 (fr) * 2022-05-31 2023-12-07 Stackpack B.V. Plateau en carton

Also Published As

Publication number Publication date
IT202000027980A1 (it) 2022-05-23
EP4255725A2 (fr) 2023-10-11
WO2022107181A3 (fr) 2022-08-04

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