FR2779128A1 - Package for keeping products cold - Google Patents

Abstract

The package (1,3) is made from cardboard. A compartment is formed in its interior, and dry ice is placed in this compartment. The compartment is connected to area of the package in which the products are located which are kept cool by the cold gas vapor.

Description

l 2779128

  PACKAGING FOR THE CONSERVATION OF PRODUCT (S) IN

  COLD The present invention relates to the general field of packaging; it relates to a packaging allowing the conservation of product (s) in the cold especially during their transport or their storage, in particular to ensure a continuity of the cold chain for foodstuffs, before consumption. The storage and transport of foodstuffs is generally carried out in refrigerated enclosures to increase their shelf life. Very often also, these foodstuffs are packaged in packages which allow them to be kept in a cold atmosphere when they leave said refrigerated enclosures, so as to avoid breaking the chain of

  cold, or at least to delay the evolution of the internal temperature.

  In some cases, the products are simply placed in closed packages made of insulating material. For fish and crustaceans in particular, it is common to use simple storage tanks and to cover the stored products with ice; in this case, however, the presence of water generated during the melting of the ice is not always very

easy to manage.

  The packaging principles used so far are not entirely satisfactory, either because of their high cost or because of their

  lack of efficiency, or again due to the difficulty of implementing them.

  The present invention provides a new type of packaging that is simple, effective and not very restrictive to implement, making it possible to keep the products stored in a cold environment and this for

fairly long duration.

  The packaging according to the present invention consists of a closed packaging of cardboard or similar material in the interior volume of which is arranged a compartment for receiving dry ice, which compartment communicates with the packaging volume of the product (s) to ensure the diffusion on said products of sublimed cold carbon dioxide.

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  The carbon dioxide snow is in the solid state in flaky form or in the form of compressed fragments (pellets or bars for example); its temperature is around - 80 C. This carbon dioxide snow is stored in the packaging in isolation from the products which it is desired to keep, but suitable openings or orifices allow the cold carbon dioxide generated by sublimation to gradually diffuse over said products, in their packaging volume. The carbon dioxide generated makes it possible to limit the rate of deterioration of the stored foodstuffs by keeping them in a cold atmosphere; as the cardboard packaging is not waterproof, it

  gradually evacuates without leaving any traces.

  The quantity of dry ice used depends on the available volume and the desired storage time. On the other hand, the internal and external faces of the cardboard used can be appropriately treated according to

  the storage environment envisaged and according to the type of product packaged.

  According to a first embodiment, this packaging comprises a tray of cardboard or similar material of generally parallelepipedal shape, provided with a bottom and four side walls. A tray of cardboard or similar material for the reception of the packaged product or products is positioned in said tray, the bottom of said tray being separated from the bottom of said tray by members forming spacers to constitute the

  dry ice storage compartment.

  The shape and dimensions of the tray are adapted to ensure the presence of a space between its side walls and those of said tray, allowing the diffusion of the sublimated carbon dioxide over the

packaged products.

  A shutter cover provided with embedding means on the top of the

  tray allows to close the packaging volume.

  According to a preferred embodiment, the cardboard tray is provided with end flaps forming sidewalks which extend parallel to its

background.

  The internal tray consists of a bottom, two end walls and two longitudinal double walls in the ends of which are flaps which extend said end walls, for

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  allow modular positioning of said end walls by pivoting around the fold line which connects them to the bottom, said tray also comprising legs for ensuring its

  raised position in the bottom of the packaging tray.

  More preferably, the double longitudinal walls of the internal tray consist of a first element connected to the bottom by a fold line, which is extended by a second element intended to be folded down internally. This second element comprises monobloc extensions which pass through openings in the bottom to ensure the maintenance in position of said double walls, which extensions extend projecting under said bottom to form the legs of the tray. The openings in the bottom have parallel cutouts which extend their ends so as to facilitate the introduction of said

  extensions in said openings.

  According to a second possible embodiment, the packaging according to the invention consists of a tray of cardboard or similar material of generally parallelepipedal shape, provided with a bottom and four side walls, at least one of said walls comprising a first extension disposed parallel to the bottom, followed by a second extension disposed parallel or substantially parallel to said wall and which extends to the bottom, to form the storage compartment for dry ice. This second extension comprises one or more one-piece lugs which are fitted into one or more corresponding openings arranged in the bottom to maintain its positioning; it also has one or more orifices arranged in its upper part to allow the diffusion of cold carbon dioxide

  sublimated, over packaged products.

  Again, a shutter cover provided with mounting means on the

  above the tray closes the packaging volume.

  According to a preferred embodiment, one of the side walls of the tray has the first and second extensions allowing the formation of the dry ice storage compartment; Wall

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  opposite has a single extension that extends parallel to the bottom

  to form an end pavement.

  For these first and second embodiments, the closure cover advantageously consists of a cardboard or similar plate, square or rectangular, two edges of opposite ends of which are intended to come to rest on the end extensions associated tray which extend parallel to the bottom. The two other opposite edges of the cardboard plate are extended by mounting flaps intended to be positioned in the packaging tray, along its longitudinal walls; the lateral ends of these embedding flaps comprise latching lugs intended to be positioned under the

  shelf end extensions.

  According to a third possible embodiment, the packaging according to the invention consists of - a cardboard tray or a similar material of generally parallelepiped shape, provided with a bottom and four side walls, - a cover shutter provided with embedding means on top of said tray to close the packaging volume, and - a receptacle for conditioning dry ice, integral with the internal face of said cover, which receptacle has one or more orifices in its upper part, arranged to ensure the diffusion of gas

  cold carbon dioxide sublimated in the packaging volume.

  According to a preferred embodiment, the cover of the tray is in the form of a cardboard plate, one of the edges of which has a one-piece extension which is arranged to form a packaging container for dry ice, with a bottom and four side walls, and the opposite edge of which includes means for fixing the free end of said tray, after folding it

  against the internal face of said cover.

  Still according to a preferred embodiment, the packaging container for dry ice consists of a bottom, two longitudinal double walls and two end walls, one of which is attached to the cardboard plate forming the cover by a fold line. The edge of this cardboard plate which is opposite to that on which is

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  articulated said tray has an extension provided with lateral ears which are intended to be fitted into the ends of the double longitudinal walls of said tray, to ensure the fixing thereof against the

internal face of said cover.

  Still according to a preferred embodiment, the packaging tray is provided with end flaps forming sidewalks which extend parallel to the bottom. Its shutter cover is made of a cardboard or similar plate, square or rectangular, two end edges of which have extensions taken, on one side, in the side wall of the snow conditioning tray carbonic which is connected to said cardboard plate by a fold line, and on the other side, in the extension which carries the fixing ears of said tray, which extensions are intended to come to rest on the sidewalks

ends of said tray.

  On the other hand, the two longitudinal edges of the cardboard plate forming the cover are extended by recessed flaps intended to be positioned in the packaging tray, along its longitudinal walls, the lateral ends of these flaps mounting include latching lugs under the end sidewalks of said packaging tray. In addition, the longitudinal edges of the cardboard plate have extensions taken in said mounting flaps, intended to come to rest

  on the edges of the longitudinal walls of the packaging tray.

  The present invention also relates to the cardboard blank (s) suitably cut and creased, enabling this to be obtained.

  packaging or part thereof.

  The invention will be further illustrated, without being in any way limited, by the

  following description of several embodiments of the invention, given

  only by way of examples and shown in the accompanying drawings in which: - Figure 1 is an exploded perspective view of a first possible embodiment of the packaging according to the present invention; - Figure 2 is a longitudinal sectional view of the closed package illustrated in Figure 1; 6 u 2779128 - Figure 3 shows the flat cardboard blank which is intended to form the packaging tray of the packaging of Figures 1 and 2; - Figure 4 is a view of the flat cardboard blank which is intended to form the inner container of the packaging illustrated in Figures 1 and 2; - Figure 5 is a flat view of the closure cover of the same packaging; - Figure 6 is an exploded perspective view of a second embodiment of the packaging according to the present invention; - Figure 7 shows the flat cardboard blank which is intended to form the packaging tray of the packaging illustrated in Figure 6; - Figure 8 shows the flat cardboard blank which is intended to form the sealing cover of the packaging illustrated in Figure 6; - Figure 9 is an exploded perspective view of a third possible embodiment of the packaging according to the present invention; - Figure 10 shows the flat cardboard blank intended to form the packaging tray of the packaging of Figure 9; - Figure 11 shows the flat cardboard blank which is intended to form the sealing cover and the storage tray for dry ice packaging of Figure 9; - Figure 12 is a perspective view of the packaging cover

  illustrated in Figure 9, with the associated tray.

  The cardboard packaging illustrated in FIGS. 1 and 2 comprises a packaging tray 1 open at the top, a tray 2 intended for

  receive the packaged products and a cover 3.

  The dry ice 4, in the form of pellets or compressed tubular sections, is placed in the bottom of the tray 1; the packaged products, not shown, are positioned in the tray 2 which, itself, is inserted in the tray 1 and the closure cover 3 closes the opening

  upper of said plate 1 in the most closed manner possible.

  The space between the bottom of the tray 1 and the bottom of the tray 2 defines the

  compartment 5 for storing compressed carbon dioxide 4.

  This compressed carbon dioxide snow gradually passes from the solid state to the gaseous state due to its rise in temperature and the gas

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  cold carbon dioxide spreads in the packaging volume and in particular above the packaged products, through the space between the walls of the tray and those of the tray. The dimensions of the tray are adapted according to those of the tray to maintain an appropriate space on two opposite sides or on the entire periphery. The packaging tray 1 is produced from the cut and creased cardboard blank illustrated in FIG. 3. It has a generally parallelepiped shape comprising a bottom 6 bordered by two end walls 7 and by two longitudinal walls 8. Both end walls 7 have side flaps 9 folded square and glued to the internal faces of the longitudinal walls 7 to maintain the volume; they also each have an end flap 10 folded back to the square parallel to the bottom 6 and held in position by lateral lugs 11 glued to the external face of the longitudinal walls 8 or to the external face of the flaps 9 by means of

  appropriate cutouts arranged in said walls 8.

  The two flaps 10 form end pavements which stabilize the packaging during stacking and which also allow the

  positioning of the cover 3 in detail below.

  The tray 2 is obtained by manual volume setting of the cardboard blank illustrated in FIG. 4. It comprises a bottom 13 of generally rectangular shape bordered by two end walls 14 provided with lateral flaps

  and by two double longitudinal walls 16.

  The double longitudinal walls 16 are obtained from a first wall element 17 which is connected to the bottom 13 and which is extended by a second wall element 18 folded down internally. The flaps 15 of the end walls 14 are positioned between said first and second wall elements 17, 18 and the maintenance of the volume is obtained by projecting studs 19 located on the outer edge of said second wall element 18, which come

  fit into suitable openings 20 arranged in the bottom 13.

  The flaps 15 are simply pinched into the ends of the double walls 16 and they are cut so as to allow modular positioning of the end walls 14, by pivoting around the fold lines 21 which connect them to the bottom 13. This feature makes it possible to limit congestion in

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  length of the tray 2, either to facilitate its introduction into the tray 1,

  in particular under the end pavements 10, or to facilitate removal.

  After insertion into the packaging tray, the volume of the tray 2 can be increased by simply pulling on its end walls 14, to occupy the packaging volume in an optimal manner. Preferably, the maximum length of the tray is slightly less than the length of the packaging tray to maintain an internal clearance allowing the passage of the sublimed cold carbon dioxide. Along each longitudinal wall 8, the space between the flaps 9 ensures the presence of an opening allowing the passage of the

sublimated gas.

  According to a particularly advantageous characteristic, the locking studs 19 protrude under the bottom 13 to form support feet which allow the tray to be raised in the tray 1. The height of the feet 19 defines the height of the storage compartment 5 of the snow

  carbon dioxide, between the bottom 6 of the tray 1 and the bottom 13 of the tray 2.

  To facilitate the embedding of the base and locking members 19 in the orifices 20, parallel cutouts 22 are provided from the ends of said orifices 20, oriented towards the inside of the tray. The length of these cutouts 22 is a function of the height of the

base 19.

  The shutter cover 3, shown in isolation and flat in FIG. 5, consists of a rectangular cardboard plate 24 whose length corresponds substantially to that of the tray 1 so that its ends come to rest on the sidewalks 10. Along its longitudinal edges, the cardboard plate 24 has mounting flaps 25 connected by the fold lines 26 and the lateral ends of which are cut out to form snap-in lugs 27. The flaps 25 are intended to be inserted in the packaging tray 1, along the longitudinal walls 8 and the pins 27 are fitted under the side ends of the sidewalks 10 to ensure

locking.

  The different parts of the packaging which has just been described can be made of single or double thickness corrugated cardboard, depending on the desired resistance. The internal and external faces of the carton can receive

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  an appropriate treatment, type water-repellent varnish or other, depending on the

  products packaged and according to the storage environments envisaged.

  This type of packaging may very well be suitable for packaging fish; the presence of compressed dry ice making it possible to maintain a temperature below 0 C inside the packaging, for at least 48 hours. For this kind of products, a sheet of plastic of the food type can possibly be

  positioned at the bottom of the receiving tray.

  After storage or transport, the tray 2 inserted in the packaging tray 1 can be used alone as a display stand for the

  presentation for sale of the product (s).

  FIG. 6 illustrates another possible embodiment of the packaging in accordance with the present invention, consisting of a packaging plate 28 provided with one-piece means allowing the formation of an internal receptacle 30 suitable for receiving the carbon dioxide snow, associated with a

shutter cover 31.

  The packaging tray 28 is produced from the cardboard blank shown in FIG. 7. It has a parallelepiped shape comprising a bottom 32 bordered by two end walls 33, 34 and by two longitudinal walls 35, 36. The walls ends 33 and 34 have side flaps 37 folded inwardly and glued against the internal faces of the

  longitudinal walls 35, 36 to maintain the volume.

  The wall 33 has an extension 38 folded at right angles, parallel to the bottom 32, to form an end pavement. This sidewalk 38 has two lateral ears 39 which allow it to be held by bonding against the external faces of the adjacent walls 35, 36 or against the external faces of the flaps 37 by means of suitable cutouts

in said walls 35, 36.

  The opposite wall 34 has a first extension 40 which is folded square, parallel to the bottom 32, followed by a second extension 41, also folded square, parallel to said wall 34. The first extension 40 acts end sidewalk; it has two ears

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  lateral 42 glued against the external faces of the longitudinal walls 34, 35

  or against the external faces of the flaps 37 to keep it in place.

  The second extension 41 extends to the bottom 32, its free end comprises two pins 43 able to be fitted into openings 44 arranged in the bottom 32 to obtain a locked positioning. The end wall 34, the first extension 40, the second extension 41, the side flaps 37 and the bottom 32 delimit the compartment integrated into the packaging volume of the plate 28 and in which the dry ice can be stored. This compartment 30 is separated from the product storage volume by the second extension 41; this second extension 41 comprises a series of orifices 45 in its upper part, which allow the diffusion of the sublimed cold gas in the storage volume of the

products, on top of these.

  The shutter cover 31 is identical to the cover 3 described in the previous embodiment. It consists of a cardboard plate 46 provided with mounting flaps 47 with locking lugs 48. The ends of this cover 31 are positioned on the end pavements 38 and of the plate 28 and its locking lugs 48 come to be embedded under the lateral ends of these two sidewalks, during the internal positioning of the

flaps 47.

  In Figures 6 and 7, we note the cutouts 49 made on the sides of the second extension 41, which allow the passage of the locking pins

48 under the first extension 40.

  Here again, the type of cardboard used and the possible treatments of its internal and external faces will depend on the products packaged as well as

storage conditions.

  As a variant, compartments for storing dry ice can be fitted at the two ends of the plate 28. It is also possible to envisage making a similar compartment on one or on the two long sides of the plate; the structure of the shutter cover will then be

adapted accordingly.

  A third possible embodiment of the conforming packaging

  to the present invention is shown in Figures 9 to 12.

  l l 2779128 This particular packaging consists of a packaging tray 50 associated with a closure cover 51 which carries the compartment 52 in

  which is stored dry ice.

  The packaging tray 50 is identical to the tray 1 which has been described in connection with the first embodiment illustrated in Figures 1 to 5; he is

  obtained by volume setting of the cardboard blank shown flat in FIG. 10.

  This plate 50 has a bottom 53 bordered by two small end walls 54 and by two large longitudinal walls 55. The two end walls 54 are provided with side flaps 56 secured by bonding with the internal faces of the large walls 55; they also include extensions 57 forming end sidewalks maintained by means of lateral ears 58 glued against the external faces of the large walls 55 or against the external faces of the flaps 56, by means of cutouts.

  adapted in said large walls 55.

  The shutter cover 51 consists of a cardboard plate 60 provided with positioning and locking means on the plate 50, and on the internal face of which the compartment 52 for storing the dry ice is secured. This shutter cover 51 is obtained by volume of the cardboard blank shown flat in Figure 11; he is represented totally

  mounted in Figure 9 and being assembled in Figure 12.

  The two longitudinal edges of the cardboard plate 60 have extensions 61 connected by the fold lines 62, intended to be inserted in the plate 50 along the large walls 55; these extensions 61 include snap lugs 63 at their lateral ends, which are positioned under the end sidewalks 57 to

  lock the cover.

  In FIGS. 9, 11 and 12, it can be seen that the corresponding edges of the cardboard plate 60 have extensions 65 taken in the extensions 61, which are intended to come to bear on the end

  upper of the large walls 55 of the plate 50.

  One of the end edges of the cardboard plate 60 has a first monobloc extension 67 connected by the fold line 68, arranged to constitute the receptacle 52 for storing dry ice, in the form of a tray, while its other end edge comprises a second monobloc extension 69 connected by the fold line 70, arranged to constitute means allowing the fixing of the free end of said tray 52, after folding it against the internal face of the plate cardboard 60. The tray 52 illustrated in FIGS. 9 and 12 comprises a rectangular bottom 71 whose length corresponds substantially to the length of the cardboard plate 60. This bottom 71 is bordered by two small end walls 72 provided with lateral flaps 73, and by two double longitudinal walls 74

  each formed of two juxtaposed elements 75 and 76.

  The upper edge of one of the end walls 72 is connected to the plate

  of cardboard 60 through fold line 68.

  The volume of this tray is produced by positioning the flaps 73 against the internal face of the first elements 75 of the longitudinal walls 74, then by internally folding the second element 76 locked by one-piece tenons 77 which come to fit into appropriate openings 78

fitted in the background 71.

  On the other side of the cardboard plate 60, the extension 69 consists of a flap 80 which is articulated on the fold line 70 and which is provided

side ears 81.

  In FIGS. 9, 11 and 12, we can still see the extensions 82 taken in the flap 80, on one side, and in the end wall 72 of the tray 52, on the other side. These extensions 82 extend the cardboard plate 60 to form supports intended to come to rest on the sidewalks 57 of the platform 50

  they complement the action of the lateral extensions 65 detailed above.

  Once set in volume and loaded with dry ice, the tray 52 is folded against the internal face of the cardboard plate 60 by pivoting around the fold line 68 and the ears 81 of the flap 80 come to be embedded in the ends of the double walls 74 to lock its positioning. The flap 80 then comes to double the end wall 72 in correspondence.

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  The lid structure illustrated in FIG. 9 is obtained with the monobloc compartment 52 which forms a kind of basket in which is

stored carbon dioxide snow.

  In the closed position, the cover 51 rests on the longitudinal walls 55 of the plate 50 and on its end sidewalks 57, by means of the extensions 65 and the extensions 82; the snap lugs 63 of the extensions 61 ensure that it is locked in a manner identical to that described in connection with the first two modes of

realization above.

  The compartment 52 fixed against the internal face of the closure plate 60 extends in the packaging volume defined by the plate 50, above the packaged products. The diffusion of the sublimated cold carbon dioxide is ensured by the presence of openings 84 made at the level of the upper edge of the tray 52; the openings 84 correspond for example to

The location of the extensions 82.

  As for the previous embodiments, the cardboard used and the treatment of its internal and external faces will depend on the products stored and

terms of use.

  In all cases, it is possible to provide for the presence of stacking members in the form of corner angles or studs projecting from the upper edge of the plate, associated with suitable orifices arranged in its bottom; these various stacking members will be adapted to avoid the presence of orifices in the storage compartment for compressed carbon dioxide snow capable of causing the escape of the sublimed carbon dioxide in

  outside the packaging volume.

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Claims (13)

- CLAIMS -   1.- Packaging for the preservation of product (s) in the cold, characterized in that it consists of a closed packaging of cardboard or similar material (1, 3; 28, 31; 50, 51) in the interior volume which is arranged a compartment (5, 30, 52) for receiving carbon dioxide snow (4), which compartment communicates with the packaging volume of the product (s) to ensure the diffusion over said products of sublimed cold carbon dioxide. 2.- Packaging according to claim 1, characterized in that it consists of: - a tray (1) of cardboard or similar material of generally parallelepipedal shape provided with a bottom (6) and four side walls (7 , 8), - a tray (2) made of cardboard or similar material for receiving the packaged product (s), consisting of a bottom (13) and four side walls (14, 16), which tray (2) is positioned in said tray (1), its bottom (13) being separated from the bottom (6) of said tray (1) by members (19) forming spacers to constitute the compartment (5) for storing dry ice (4) , the shapes and dimensions of said tray (2) being adapted to ensure the presence of a space between its side walls (14, 16) and those (7, 8) of said tray (1), allowing the diffusion of cold carbon dioxide sublimated over the packaged product or products, and - a closure cover (3) provided with embedding means (25, 27) on the   above said tray (1) to close the packaging volume.   3.- Packaging according to claim 2, characterized in that it comprises: - a tray (1) provided with end flaps (10) forming sidewalks which extend parallel to its bottom (6), - a tray internal (2) comprising two double longitudinal walls (16) at the ends of which flaps (15) are fitted which extend the end walls (14) to allow modular positioning of said end walls (14) by pivoting around the fold line (21) which connects them to the bottom (13), said tray (2) comprising 2779128   also legs (19) to ensure its positioning   raised in the bottom (6) of said tray (1).   4. Packaging according to claim 3, characterized in that it comprises a tray (2) provided with double longitudinal walls (16) consisting of a first element (17) connected to the bottom (13) by a fold line, which is extended by a second element (18) intended to be folded down internally, which second element (18) comprises monobloc extensions (19) which pass through openings (20) arranged in the bottom (13) to maintain the position said double walls (16) and which protrude beneath said bottom (13) to form the legs of the tray (2), said openings (20) arranged in the bottom (13) comprising parallel cutouts (22 ) which extend their ends to   facilitate the introduction of said extensions (19) into said openings (20).   5.- Packaging according to claim 1, characterized in that it consists of: - a tray (28) of cardboard or similar material of generally parallelepipedal shape provided with a bottom (32) and four side walls (33 , 34, 35 and 36), at least one of said walls (34) comprising a first extension (40) arranged parallel to the bottom (32), followed by a second extension (41) arranged parallel or substantially parallel to said wall (34) and which extends to the bottom (32) to form the compartment (30) for storing the compressed dry ice, said second extension (41) comprising one or more monobloc pins (43) which are fitted in one or more openings (44) in correspondence arranged in said bottom (32) to maintain its positioning, and which second extension (41) comprises one or more orifices (45) arranged in its upper part, to allow diffusion cold carbon dioxide sublimated over the packaged products, and - a sealing cover (31) provided with embedding means (47, 48) on   the top of said tray (28) to close the packaging volume.   6. Packaging according to claim 5, characterized in that it comprises a plate (28) one of the side walls (34) of which has first and second extensions (40, 41) to form the compartment (30) 16 2779128   for storing dry ice and the opposite wall (33) of which has a single extension (38) which extends parallel to the bottom (32) to form an end pavement.   7.- Packaging according to claim 3 or according to claim 6, characterized in that it comprises a closure cover (3, 31) consisting of a cardboard plate or of similar material (24, 46), including two opposite end edges are intended to come to rest on the end extensions (10; 38, 40) of the associated plate (1, 28) which extend parallel to the bottom (6, 32), and of which the two other edges opposite are extended by recessed flaps (25, 47) intended to be positioned along the internal face of the corresponding longitudinal walls (8; 35, 36) of the plate (1, 28), the lateral ends of said flaps (25, 47) comprising snap lugs (27, 48) intended to be positioned under said end extensions (10; 38, 40) of said tray (1, 28).   8.- Packaging according to claim 1, characterized in that it consists of: - a cardboard or similar material tray (50) of generally parallelepiped shape, provided with a bottom (53) and four side walls ( 54, 55), - a closure cover (51), of cardboard or similar material, provided with embedding means (61, 63) on the top of said tray (50) to close the packaging volume, and - A receptacle (52) for conditioning dry ice, integral with the internal face of said cover (51), which receptacle (52) has one or more orifices (84) in its upper part, arranged to ensure the   diffusion of the sublimated cold carbon dioxide in the packaging volume.   9.- Packaging according to claim 8, characterized in that it comprises a cover (51) in the form of a cardboard plate (60) one of the edges of which has a monobloc extension (67) which is arranged to form the receptacle (52) for conditioning dry ice, in the form of a tray with a bottom (71) and four side walls (72, 74), and the opposite edge of which comprises means (80, 81) for fixing the end free of said tray (52), after folding it against the   inner face of said cardboard plate (60).   10.- Packaging according to claim 9, characterized in that the container (52) for conditioning the dry ice consists of a bottom (71), two double longitudinal walls (74) and two end walls ( 72) one of which is attached to the cardboard plate (60) by a fold line (68), and in that the edge of said cardboard plate (60) which is opposite to that on which said tray is articulated (52) has an extension (80) provided with lateral ears (81) which are intended to be embedded in the ends of said double longitudinal walls (74) of said tray (52), to ensure the fixing thereof. against the inner side of said cardboard plate (60).   11.- Packaging according to claim 10, characterized in that it comprises: - a tray (50) provided with end flaps (57) forming sidewalks which extend parallel to the bottom (53), and - a cover shutter (51) consisting of a cardboard or similar plate (60), square or rectangular, two end edges of which have extensions (82), intended to come to rest on said end sidewalks (57 ), One of said extensions (82) being taken in the end wall (72) of the tray (52) which is connected to said cardboard plate (60) by a fold line (68), and the other extension (82) being taken in the   extension (80) which carries the ears (81) for fixing said tray (52).   12.- Packaging according to claim 11, characterized in that the two longitudinal edges of the cardboard plate (60) forming the cover (51) are extended by mounting flaps (61) whose lateral ends include lugs d 'snap (63) under the end sidewalks (57) of the packaging plate (50), said longitudinal edges comprising extensions (65) taken in said embedding flaps (61), intended to come to rest on the edges longitudinal walls (55) of the tray (50). 18 2779128   13.- Blank of cardboard or similar material suitably cut and creased to obtain packaging or a portion of packaging according to   any one of claims 1 to 12.