ES2291829T3 - CARTON CONTAINER WITH VENTILATION MEDIA. - Google Patents

Abstract

The container has two superimposed layers between which free air circulation is allowed. Adjoining bases (8) reach the lateral conditioning walls (2, 3) and are folded against an external face of a bottom (1). The bases are integrated to form local extra-thickness on the bottom with an interval and to lift with respect to an identical conditioning on which it can be brought to rest.

Description

Cardboard container with means of ventilation.

The present invention relates to a container of a semi-rigid material such as cardboard or corrugated cardboard, in Particular for fresh food products. In one of his ways of implementation, the invention relates more particularly to such a container, suitable for being sealed by an air permeable operculum.

Numerous cardboard and cardboard containers corrugated, if treated, have been proposed in the art for transportation and exposure to the sale of products Fresh food These containers are usually open on the top and are for example tray type or nacelle.

For certain food products to be packaged, the semi-rigid material that constitutes these containers is coated,  at least on the faces of their different parts oriented towards the inside, of a continuous flexible film of a material plastic impermeable to gases and liquids. These containers they are also open at the top but some flanges, also lined with said plastic film, they can stand out parallel to the bottom, so that a film can be welded plastic closure on said bottom, after placing the food products or conditioned products.

The plastic films used as Opercles in the past, had the inconvenience of being waterproof on air, although for certain packaged food products or for products intended to undergo treatment, it is desirable that the air inside the container can be renewed and that an exchange of gas can occur between the interior and the outside of the container

For this reason it has been replaced gas impervious operculums, by materials that are air permeable, for example based on plastics or certain complex weldable papers.

These materials give complete satisfaction but it has found that, when the packages are superimposed on several layers, with the bottom of the packaging of a layer resting on the closure films of the layer packaging immediately bottom of the stack, the bottoms of the containers are opposed to a satisfactory circulation of ambient air into the containers, or vice versa, of the gases inside the container outward from it.

A similar problem may arise even when The package is simply made of cardboard or cardboard wavy, with a very closed porosity, treated or not, but not coated with a plastic film.

The present invention wants to remedy this inconvenient, arranging these various packages so that allow free air circulation between overlapping layers of such containers

Accordingly, the object of the invention is a container of a semi-rigid material such as cardboard or cardboard corrugated, this package comprising a bottom and walls lateral, of which some are at least articulated on this bottom part, this package being characterized by the fact that, to allow free air circulation between the superimposed layers of such a container, fins adjacent to certain container walls or internal or external flaps adjacent to some walls of the container are folded against the outer face of the fund and are in solidarity with it, in order to form over-thicknesses premises on this fund and raise it in this way with respect to an analogous container on which it can be carried for lean on.

These fins can be glued, welded or mechanically locked in position on the outer face of the background, particularly at the angles of the latter, and the overspeakers that form, leave between two layers of packaging overlapping analogs, an interval that allows ambient air circulate between them, or come to renew the air that is in inside the containers, or also let out the gases that are  form in the container by reaction between the different products or Food products that are packaged.

Preferably, in order to increase this freedom of movement of ambient air, a folding line by at least, it brings together the bottom and at least one side wall either, and extending between two fins arranged in a same side of the outer face of the bottom, it forms a curved line whose Concavity is oriented outward. Thus, after of mounting the container, the central part of the bottom is even more above the fins gathered by said line of creased.

The invention is particularly well adapted. for semi-rigid containers whose interior is coated with a plastic film and included in the upper part of certain walls, protruding parts laterally, parallel to the bottom, and intended to receive a closing seal permeable to air.

In such an embodiment, the walls sides of the container may advantageously be inclined towards the bottom, such that the cross section of the container is wider at the top than at the bottom, offering this way a wide passage for the air that circulates between containers of the same layer, or between adjacent piles of such containers, and protruding plastic film flanges eventually outward and they are arranged in the part superior of these containers, also ensure a similar function.

The package according to the invention is therefore very suitable for transport, for storage and for sale exposure, in the form of overlapping layers of products, in particular food products, or products for which is necessary an excellent circulation of the ambient air and / or interior for heating or cooling, for maturation and / or for conservation.

Two forms of implementation of the invention will be described below, by way of examples, with reference to the attached drawings, but it will be clear to the expert in the art, that the invention applies to many other types of packaging

In the drawings:

Figures 1 and 2 are perspective views of three quarters, respectively from above and below, of a carton or corrugated cardboard container, of type wafer according to invention, not lined with a plastic film;

Figure 3 is a plan view of the plate of cardboard or pre-cut and stressed corrugated cardboard, of which comes the container of figures 1 and 2;

Figures 4 and 5 are analogous views of the Figures 1 and 2 of the body of another carton or corrugated cardboard container according to the invention, but lined with a film of material plastic and intended to be sealed by an operculum;

Figure 6 is a side elevation view of the container of figures 4 and 5 sealed by an operculum;

Figure 7 is a perspective view of two closed containers of the type of figure 6, stacked one on the other;

Figure 8 is a plan view of the plate of pre-cut and stressed corrugated cardboard or cardboard, from the which can be mounted the container body of figures 4 to 7.

Reference will be made first to the figures 1 to 3

The package represented is of a general type known itself, which comprises:

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a bottom part 1, here of substantially rectangular shape;

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two longitudinal walls 2, articulated by two folding lines 10 a along two parallel sides of bottom 1 and raised perpendicular to it;

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two transverse walls 3, articulated by two folding lines at along the other two sides of bottom 1 and also raised perpendicular to this one.

At the two ends of the walls 2, about 4 panels that form internal flaps, are articulated by fold lines perpendicular to the bottom, these being folded panels 4 perpendicular to these walls 2, against the face internal walls 3 adjacent and pinched between wall 3 associated, and a panel 5, articulated by a double parallel highlight at the bottom 1 at the top of this wall 3 and folded against said wall inside the container. A tab 6, which protrudes in the direction of the bottom 1 from the contiguous edge of the panel 5, is inserted in a recess 7 made in a corresponding position at bottom 1, to lock the container in mounted position.

According to the invention, cut-out tabs 8 at the ends of the walls 3, adjacent to the bottom 1, they are adjacent by a double stressed to the adjacent panels 4 and are folded perpendicularly to the latter, to be applied and glued against the outer face of bottom 1, where in this way they form an outer thickness in each corner.

When the full containers are stacked ones over the others, each of them relies on parts 9 arranged between the double stressed by which the walls 3 of the immediately lower container are articulated on the adjacent panels 5 and, in this position, the tabs 8 form thick wedges, which allow easy access of the ambient air into the container and the evacuation towards  the outside of the gases emitted by food products packaged

To favor and increase this ventilation of the inside the container, the folding lines 10 by which the 2 walls are articulated on the bottom, they are not perfectly parallel to each other, but are slightly curved between the tabs 8 located at their ends, with their concavity oriented outward, so that the central part of the base of the walls 2 are raised above the tabs 8. The communication between the inside of the container and the ambient atmosphere It increases in this way in a particularly simple way. The fold lines 10 'by which the transverse walls 3 they are articulated on the bottom 1 they can also be curved, with its outward-facing concavity, instead of the fold lines 10 or in addition to these.

The package shown in Figures 4 to 8 is of the general type marketed by the Applicant with the PUR-T denomination (registered trademark). It includes a corrugated cardboard body, which, unlike a wafer usual and of the container represented in figures 1 to 3, is provided inside a thermoformed coating of Food grade plastic material, which makes it suitable for receive fresh food products, and is meant to be sealed, after filling, by a permeable operculum gases

This body comprises, in a known manner in yes:

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a background part 11, here octagonal;

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two side walls 12, articulated respectively by a line of folded along two opposite sides of the bottom 11;

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other two side walls 13, articulated respectively by a line folding over bottom 11 along two sides of it, not adjacent to the sides by which the walls 12 are articulated on said bottom;

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four side walls 14, two of them being associated with each of the walls 13, along the side edges and from the which are articulated by inclined fold lines with with respect to substance 11;

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four panels 15, each of them being articulated by a line of inclined folding with respect to the bottom 11 on one of the walls 14, these panels 15 being intended to be applied against the face internal walls 12 adjacent to be attached to is;

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protruding parts 16, articulated by a folding line along an edge of the panels 14 opposite the bottom 11, said portions 16 being folded parallel to the bottom towards the inside of the container, resting on the upper edge of the panels 15, with one end 16 to fold against the outer face thereof and glued against them or eventually mechanically locked in position in a lined portion of a wall 12;

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nail flaps 17, articulated by a double pointed over the walls 3, along one side of these walls opposite bottom 11, and folded against the inner faces of these walls 13.

As best seen in Figures 4 to 7, a film of thermoplastic material is thermoformed inside the package and forms a flange 18, continuous or not, protruding here outward, at the top of the package. This film completely covers the face of the parts oriented towards the inside of the container, as well as the face oriented towards the outside of the parts 16 and 14 and the portion 17 a of the flaps 17 located between the raised doubles, on which one can in this way, fix a gas-permeable operculum 19 (see figure 3), after filling the container.

The containers manufactured in this way in series they form a plate in which they are adjacent to each other by their flanges  18 of thermoplastic material, and the plates of these full containers and closed are supplied stacked on top of each other to their distributors after filling.

According to the invention, to allow a free passage of the ambient air inside or outside the containers through its operculum, and free air circulation between the different layers, fins 20 articulated by fold lines at the base of the walls 4, are folded against the outer face of the bottom 11, to which they are attached, in order to form on this fund an excess thickness that increases the funds of the containers of the same plate with respect to the operculums of the containers of another plate on which they rest.

Always to favor air circulation between the bottoms of the packaging of a plate and the operculums of the containers of another plate on which they rest, the lines of folding 21, by which the walls 13 are articulated on the bottom 11, and that bring together the adjacent 20 fins, are not rectilinear, but curved so that its concavity is oriented towards the outside of the container, that is, its part center is raised above its ends corresponding to the base of the side walls 3. As seen in figure 7, the central part of the bottom of a container is even more raised above the operculum of the similar container on the which one rests

As in the previous embodiment, the fold lines 22, by which the walls 12 are articulated on the bottom 11, they can be curved, with their concavity facing outward, in addition to lines 21 or in place of these.

The inclination of the walls with respect to bottom of each container, and the separation created between the containers of the same plate on the flanges 18 of the thermoformed material, when these have been planned, they further favor circulation of the ambient air between the containers of the same plate and between batteries contiguous of such containers.

In the embodiment of the invention of Figures 4 to 8, instead of the fins 20 described above, are it can also provide fins 23 cut at the base of the walls 20, in parts of the latter, lined internally by the panels, and articulated on the bottom 11 by a part of the fold line 22 (see figure 8, where fins 23 are represented with dashed lines).

This container is therefore particularly well suited for product packaging food or products for which it is important that renew the air present in this container, through the operculum that close it

It is clear that the invention is not limited to the types of packaging or the embodiments that have just been be described Thus, the fins folded against the outer face from the bottom, instead of being articulated at the base of certain side walls of the container, could also be articulated on some flaps adjacent to the top of certain walls and folded against the outer face of the latter.

Claims (5)

1. Container of a semi-rigid material such as cardboard or corrugated cardboard, said container comprising a bottom part (1; 11) and side walls (2, 3; 12, 13, 14), of which some (2, 3; 12, 13) at least, they are articulated on this bottom part, this package being characterized in that, to allow a free circulation of air between superimposed layers of such container, fins (8; 20, 23) adjacent to certain walls (14 , 12) of the container, or to internal (4) or external flaps adjacent to walls of the container, are folded against the outer face of the bottom (1; 11) and are integral with it, in order to form local over-thicknesses on this bottom and raise it in this way with respect to a similar container on which it can be carried for support. 2. Container according to claim 1, characterized in that the fins (8; 20, 23) are glued, welded or mechanically locked in position on the outer face of the bottom (1; 11). 3. Container according to one of claims 1 and 2, characterized in that a folding line (10, 10 '; 21, 22) extends between two fins (8; 20) arranged on the same side of the outer face of the bottom. along which a wall (2, 3; 12, 13) is articulated on the bottom (1; 11), said folding line being curved, with its concavity oriented towards the outside of the container, in order to raise the central part of the base of this wall (2, 3; 12, 12) with respect to the associated fins (8; 20). 4. Package according to one of claims 1 to 3, whose interior is coated with a film of material plastic, which eventually protrudes laterally outwards of the container, on top of the side walls, forming a flange (18), continuous or not, suitable for receiving an operculum (9) of air permeable closure. 5. Package according to one of claims 1 to 4, characterized in that at least some of its side walls (12, 12, 14) are inclined in the direction of the bottom (11) so that its cross-section is wider in its upper part than near the bottom (11).