FR2844343A1 - Double-walled thermally insulated drinks container used in shops to preserve the temperature of beverages, has inside container, outer envelope with a insulating paste between them - Google Patents

Abstract

The device includes a inside container (1), an open envelope having thermal insulation, a closure element, a paste material. The inside container is inserted in the envelope (2), connected in a sealing manner to the edge of the opening of the envelope, and in a thermal conductive sealing manner, and in form and volume smaller to that formed by the envelope. The container is separated from this envelope by a space (3), this space being refilled up to three-quarter by this paste.

Description

Double wall thermally insulating device The present invention

  relates to the field of containers of drinks or other liquids retaining the temperature. The invention relates more particularly to a double wall thermally insulating device. It is known in the prior art devices for preserving drinks at an initial temperature. The insulated bottle with the registered name "thermos" is an example of a device allowing a liquid to retain its

  temperature for several hours.

  This device has a non-negligible size. It serves as a container for liquids but cannot contain bottles. In addition, it presents

  the disadvantage of being heavy and its manufacturing cost is not cheap.

  Thermally insulating equipment intended for products sensitive to temperature variations is also known. These 15 devices, relatively complex and requiring often costly cooling elements, are especially suitable for the conservation of objects of small dimensions. The present invention therefore aims to overcome one or more of the drawbacks of the prior art by proposing a thermally insulating double-walled device 20 made of very economical, lightweight materials, which

  allows efficient storage of drinks or other liquids.

  This object is achieved by a thermally insulating double-walled device, comprising a so-called inner vessel, an open envelope comprising a thermal insulator, a closure element, a pasty material, characterized in that said inner vessel, inserted into the envelope , tightly connected to the edges of the opening of said envelope, is made of thermally conductive waterproof material and forms a volume substantially less than that formed by the envelope, at least one wall of the vase being separated from said envelope by a spacing , said spacing being filled at least at

  three quarters by said pasty material.

  According to another particular feature, said pasty material is impermeable and

includes clay or gel.

  According to another particular feature, said pasty material, absorbing

  heat, contains a substance that accumulates calories / frigories.

  According to another particularity, the interior vase includes a collar

  set in said envelope and at least a double machining, said vase comprising at least a portion of section smaller than the section of the volume io formed by the envelope.

  According to another particular feature, the said vase is cylindrical with an internal diameter substantially equal to 9 cm and has an enlarged opening, the internal diameter of which is at least equal to 9.7 cm, the bottom of the cylinder formed by the vase being flat or curved. outwardly, said envelope having a cylindrical shape and an inside diameter substantially equal to the diameter of

said opening of the vase.

  According to another particular feature, said envelope comprises a rigid metal or plastic bottom secured to a tubular wall, said tubular wall comprising cardboard inserted between an impermeable inner layer and an impermeable outer layer, said impermeable layers comprising

  minus a sheet of light metal.

  According to another particular feature, said envelope comprises waterproof plastic. According to another particularity, the interior vase is made of aluminum and / or of iron and the length of said vase is less than the length of said envelope,

  the length of said vase remaining less than 35 cm.

  According to another particular feature, said closure element, made of plastic, glass or cardboard, is a cylindrical cover resting on the top of said vase and / or resting on an inverted shoulder marking the

  change of section of the vase to form said enlarged opening.

  According to another particular feature, the transition angle of said change in

  section to form the enlarged opening is between 30 and 900.

  According to another particular feature, the thickness of said envelope is

  less than 3 mm and the thickness of the vase is less than 2 mm.

  According to another particular feature, said spacing comprises 15 to 20% of air.

  The invention, with its characteristics and advantages, will emerge more clearly on reading the description made with reference to the accompanying drawings.

  in which: - Figure 1 shows a perspective view of an embodiment of the invention, - Figure 2 shows in perspective an embodiment of the inner vessel, - Figures 3A and 3B show sectional views of two different embodiments of the invention, - Figure 4 shows a side view of an embodiment of the interior vase, - Figure 5 shows a top view of an embodiment of the interior vase, - FIG. 6 shows in perspective a first alternative embodiment of the closure system,

  FIG. 7 represents an embodiment of the invention with a second variant of the closure system.

  The invention will now be described with reference to FIGS. 1 and 2. The double-wall thermally insulating device comprises a so-called interior vessel (1) forming a first wall and an open envelope (2) comprising a thermal insulator forming the second wall . In the embodiment of FIG. 1, the interior vessel (1) is made of a thermally conductive waterproof material, for example aluminum or iron, and the length (L1) of said vessel 5 (1) is less than the length (L2 ) of the envelope (2). The envelope (2) may comprise a rigid bottom (20) of metal or plastic secured to a tubular wall to form a cylinder. The envelope (2) can also have a parallelepiped shape or the like. The rigid wall of the bottom (20) comprises cardboard inserted between an inner layer and an outer layer both of which are waterproof. These impermeable layers comprise at least one sheet of a light metal such as aluminum. The cardboard can simply be covered with an aluminum deposit. In an alternative embodiment, the impermeable layers comprise a layer of aluminum laminated to a polymer, for example polyethylene. The envelope can just as easily comprise a single impermeable layer covering the inner part of the carton. The exterior

  of the envelope can be personalized with a covering, a printed finish.

  It will be understood that the cardboard can be replaced by another light and insulating material, in particular by plastic. The envelope can also be made only of waterproof plastic. The device according to the invention may comprise, for example, an envelope (2) made of transparent plastic.

  As shown in Figure 1, the inner vessel (1) is inserted into the envelope and tightly connected to the edges of the opening of said envelope (2). In one embodiment of the invention, the interior vessel (1) comprises a collar (12) crimped in said envelope (2) to ensure this seal. The inner vessel (1) also comprises a double machining forming a portion of section smaller than the section of the volume formed by the envelope (2), said narrow portion. When the vase (1) and the envelope (2) are cylindrical, the diameter called internal diameter (Dl) of said narrow portion is for example at least 7 mm less than the diameter (D2) of the envelope (2) . A spacing (3) therefore separates both said first and second walls as well as the bottom (10) of the vase (1) and the bottom (20) of the envelope (2). The length (L1) of the interior vase (1) is sufficient to allow the interior vase (1) to contain one or more bottles. It can be at least equal to 20 cm to allow the insertion into the vase (1) of two superimposed cans and for example less than 35 cm to avoid too much bulk. The

  length difference (L2-L1) between the inner vessel (1) and the envelope (2) is for example between 3 mm and a few centimeters. In another embodiment, the bottom (10) of the vase (1) touches the bottom (20) of the envelope (2) to minimize the overall length of the device according to the invention.

  The space (3) between the two walls is filled at least three quarters with a pasty material before crimping or before any other similar operation aimed at sealingly fixing the contour of the opening (11) of the vase (1) with the envelope (2). This pasty material is preferably impermeable and comprises a substance which accumulates

  calories / frigories like clay or gel. Clay, for example, has cold storage properties due to its low eutectic point.

  The clay used is common clay, which can be composed of kaolinite, montmorillonite, chlorite and other common clays. As the casing (2) is sealed / impermeable, the moisture remains confined in the space (3) filled with the pasty, heat-absorbing material. Clay also allows

keep contents warm.

  The inner vessel (1) can be secured to the envelope (2) by molding. It is possible to add a food contact layer on the inside of the vase (1). In one embodiment of the invention, an easy opening system is inserted during crimping, molding or similar operation

  for fixing the vase (1) in the envelope (2).

  In the embodiment presented in FIG. 2, the vase (1) is cylindrical with an internal diameter (Dl) substantially equal to 9 cm and has an enlarged opening (11) whose diameter (Dl 1) is at least equal to 9.7 cm. The flanged edge (12) has for example a diameter (D12) extending over approximately 10.5 cm. The internal diameter (D2) of the cylindrical casing (2) is substantially equal to the diameter (D1I) of said enlarged opening (Il1) of the vessel (1). The bottom (10) of the cylinder formed by the vase (1) can be curved outwards, which in particular makes it possible to make the material flow more easily

pasty between the walls.

  The invention will now be described with reference to Figures 3A, 3B, 4 and 5, io In the embodiment of Figure 3A, said narrow portion of the inner vessel (1) has a length (_10) representing more than 95 % of the total length (Li) of said vase (1). The transition angle (a) between the narrow portion and said enlarged opening (11) can be for example between 30 and 900. The embodiment of FIG. 3B differs from that of FIG. 3A by a shorter length. (LI ') for said narrow portion, representing for example at least 85% of the total length (LI) of the vase (1). In this variant, the vase (1) is wedged in the envelope (2) by friction of said enlarged opening (11) against the wall of the envelope (2). The crimping of the rim edge (12) then ensures sealing. The inner vessel (1) may comprise a groove (not shown) placed below the flanged edge (12) in particular to facilitate crimping. In one embodiment of the invention, the thickness of the envelope (2) is less than 3 mm and the thickness of the vase (1) is less than 2 mm, so that the insulating device

double wall remains light.

  As illustrated in Figure 4, the bottom (10) of the vase (1) can be flat. The length (LI1) of the portion corresponding to said enlarged opening (1) measurement is of the order of a centimeter. In the preferred embodiment of the invention, and without limitation, the intermediate portion (13) between the enlarged opening (11) and the narrow portion does not exceed one centimeter in length. The narrow portion and the portion corresponding to the enlarged opening (11) may be cylindrical, as illustrated by the top view presented in FIG. 5, but other forms suitable for packaging bottles or

  packaging containing liquids can be considered.

  The invention will now be described with reference to FIGS. 6 and 7. The double wall thermally insulating device according to the invention comprises a closure element (4) made of plastic, glass, light metal or cardboard. This closing element (4) is for example a cylindrical cover closing said enlarged opening (11). The cylindrical cover 10 illustrated in FIG. 6 comprises a flattened upper part (42) of diameter (D42) substantially equal to the diameter of the flange (12) to come to bear on the top of the interior vessel (1). It also includes a lower part (41) complementary to the enlarged opening (11), wedging in said opening (11) and making it possible to close the vase (1). The diameter (D41) of this lower part (41) is substantially equal to the diameter (Dl1I) of said

  enlarged opening (11). Sealing means can be added to said closure element (4) or on the inner part of the enlarged opening (11). It is also possible to envisage adding closure means, for example by clipping, so that the closure element (4) remains integral with the rest of the device according to the invention.

  In a different embodiment, illustrated in FIG. 7, the cylindrical cover is not flattened but on the contrary extended to increase the capacity of the device according to the invention. This elongated cover (4 ') has a diameter (42) substantially equal to the diameter (Dl1) of said enlarged opening 25 (11). The elongated cover (4 ') comes to rest on the inverted shoulder formed by said intermediate portion (13). This elongated cover (4 ') may include a rigid top, for example similar to the bottom (20) of the envelope (2), so that the device can be positioned either upside down or upside down. In the preferred embodiment of the invention, the spacing (3) between the walls comprises 15 to 20% of air (5) in order to absorb an expansion of the

pasty material.

  The device according to the invention is for example adapted to be cooled 5 at the same time as its content on the shelves of distributor stores and allows the customer to transport the product while keeping it cool for direct use. The device can be stored with its contents in the refrigerator or even in the freezer when the cover is removed. It keeps a bottle cool without using ice cubes. It is possible to 1o cool a bottle using the device kept in the cold, water being poured for example into the interior vase (1) to accelerate and homogenize the cooling. One of the advantages of the thermally insulating device according to the invention lies in the simplicity of its constituents and its low production cost, while ensuring good temperature conservation for a period of a few hours. It is reusable and is composed of contact products

  biodegradable or recyclable food.

  Another advantage of this device is its small size.

  Light, it is for example particularly suitable, especially in the context of leisure, for the transport of cold drinks, chocolate, foie gras.

  It should be obvious to those skilled in the art that the present invention allows embodiments in many other specific forms without departing from the scope of the invention as claimed. Therefore, the present embodiments should be considered by way of illustration, but may be

  modified in the field defined by the scope of the appended claims, and

  the invention should not be limited to the details given above.

Claims (11)

  1. Double-walled thermally insulating device, comprising a so-called interior vessel (1), an open envelope (2) comprising a thermal insulator, a closure element (4, 4 ′), a pasty material, characterized in that said inner vessel (1), inserted into the envelope (2), tightly connected to the edges of the opening of said envelope (2), is made of thermally conductive waterproof material and forms a volume substantially less than that formed by the envelope (2), at least one wall of the vase (1) being separated from said envelope (2) by a spacing (3), said spacing (3) being filled to the   less than three-quarters by said pasty material.   2. Device according to claim 1, wherein said material   pasty is waterproof and includes clay or gel.   3. Device according to claim 1 or 2, wherein said pasty material, absorbing heat, comprises a substance accumulating calories / frigories.   4. Device according to any one of claims 1 to 3, in   which the inner vessel (1) comprises a collar (12) crimped in said envelope (2) and at least a double machining, said vessel (1) comprising at least a portion of section smaller than the section of the volume formed by the envelope (2).   5. Device according to any one of claims 1 to 4, in   which said vase (1) is cylindrical with an internal diameter substantially equal to 9 cm and has an enlarged opening (11) whose internal diameter 25 is at least equal to 9.7 cm, the bottom (10) of the cylinder formed by the vase (1) being flat or curved outwards, said envelope (2) having a cylindrical shape and an inside diameter substantially equal to the diameter of said opening (1 1) of the vase (1).   6. Device according to any one of claims 1 to 5, in   which said envelope (2) comprises a rigid bottom (20) of metal or plastic secured to a tubular wall, said tubular wall comprising cardboard inserted between an impermeable inner layer and an impermeable outer layer, said impermeable layers comprising at least one leaf of a light metal.   7. Device according to any one of claims 1 to 5, in   which said envelope (2) comprises waterproof plastic.   8. Device according to any one of claims 1 to 7, in which the inner vessel (1) is made of aluminum and / or iron and the length (1)   of said vase is less than the length (L2) of said envelope (2), the length   (L1) of said vase (1) remaining less than 35 cm.   9. Device according to any one of claims 5 to 8, in   which said closure element (4, 4 '), made of plastic, glass or cardboard, is a cylindrical cover resting on the top of said vase (1) and / or resting on an inverted shoulder marking the change of section of   vase (1) to form said enlarged opening (11).   10.The device according to claim 9, wherein the transition angle   (a) said change of section to form the enlarged opening (11) is between 30 and 90.   11. Device according to any one of claims 1 to 10, in   which the thickness of said envelope (2) is less than 3 mm and the thickness   of the vase (1) is less than 2 mm.   12. Device according to any one of claims 1 to 11, in which said spacing (3) comprises 15 to 20% of air.