FR2841542A1 - Isothermal sachet for keeping food products cool has opening with adhesive zone covered by protective strip prior to use - Google Patents

Abstract

Isothermal sachet (1) is made from a number of layers of a supple material. The layers are joined together along three sides, leaving an opening (2) which has an adhesive zone (3) along the edge of at least one inner surface that allows the sachet to be sealed after removing a protective strip (4) with the aid of a tongue or tab (5). Isothermal sachet (1) is made from a number of layers of a supple material, e.g. a central layer of paper with a thin plastic film covering at least one side. The layers are joined together along three sides, leaving an opening (2) which has an adhesive zone (3) along the edge of at least one inner surface that allows the sachet to be sealed after removing a protective strip (4) with the aid of a tongue or tab (5). The sachet can have one or more transparent panels (6) that allow its contents to be viewed.

Description

The present invention, as indicated in the wording of this

  descriptive memory, relates to an improved isothermal sachet for food, the function of which consists in producing a flexible container specially suitable for transporting food rich in water and the temperature of which must not be allowed to vary excessively, such as fish, frozen products, fresh cheeses, etc., by further solving the drawbacks of sachets of this type which are already known, such as the need for heat-sealing machines, the impossibility of seeing the food present in the sachet or the impossibility of introducing the sachet with the food in a microwave because they

  contain aluminum compounds.

BACKGROUND OF THE INVENTION

  Isothermal bags for food are known, such as that described in utility model No. U-9803051. These known sachets are formed from one or more flexible sheets formed from a base of which one or more of the faces is plasticized with a thin plastic film. In certain embodiments, these sheets are joined along their edges, with the exception of one side which forms a mouth for the introduction of food, so that, to close the sachet, one has to heat seal this mouth. In other embodiments, it is a single sheet, so that, to form the sachet, it is necessary to fold

  said sheet and heat seal all the corresponding edges.

  These isothermal bags for food of the state of the art have drawbacks such as the fact that, for their use, there is a need

  a heat sealing machine when closing the bag.

  Another drawback is that some of their embodiments include elements containing aluminum which prevent the sachet, with the corresponding food inside, from being able to be introduced into a microwave oven. There is also the disadvantage that the embodiments provided in the state of the art for this type of bag do not include the possibility of incorporating transparent zones which

  would allow you to see the food present inside the sachet.

DESCRIPTION OF THE INVENTION

  To achieve the aims and avoid the drawbacks indicated in the preceding paragraphs, the invention consists of an improved isothermal sachet for food, which is formed from one or more flexible sheets formed from a base, one or more of the faces is or are laminated) with a thin plastic film, these sheets being joined along their edges to

  except for one side which determines a mouth for introducing food.

  An innovation consists in that, according to the invention, said mouth has, on at least one of its internal sides, an adhesive zone which makes it possible to

  seal the bag when you have removed a protective tape.

  This protective tape may include a tongue or tab which projects beyond the general geometric shape of the bag, in order to allow it to be

  easily grasp to take it off.

  The sheets in question can optionally have one or more windows made of transparent material which allow the food present to be seen.

inside the bag.

  According to one of the embodiments of the invention, each of said sheets has, in section, an outer polyethylene layer, a central base in

  paper and an inner layer of polyethylene.

  In another embodiment, each of said sheets has, in section,

  an outer paper base and an inner polyethylene layer.

  With the configuration described, the sachet according to the invention has advantages such as the fact of not requiring a heat-sealing machine to effect the closure of the sachet, since the adhesive zone gives a perfect closure of a total seal. In addition, the sachet according to the invention has the advantages of being able to be introduced with food into a microwave oven, since it does not include any metallic element in its constitution, and of providing for the inclusion of transparent zones which allow to see the food

  present inside the bag.

  To facilitate a better understanding of this descriptive thesis and as an integral part of this thesis, below are attached Figures on

  which the object of the invention has been shown by way of illustration and not limitation.

BRIEF DESCRIPTION OF THE FIGURES

  Figure 1 shows a perspective view of an improved isothermal bag for food, produced in accordance with the present invention and which shows its mouth slightly open to allow the adhesive area constituting its closure to be seen. FIG. 2 represents a perspective view of an improved isothermal bag for food, produced in accordance with the present invention, and which shows an embodiment which includes a transparent zone allowing the food to be seen, as well as a tab intended to facilitate the removing a ribbon

  protector of the corresponding adhesive area.

  Figure 3 shows a section of a sheet constituting an isothermal bag made according to the present invention, and for a special embodiment

of said sachet.

  Figure 4 is a view similar to that of Figure 3 above for

  another realization of the sheet in question.

  DESCRIPTION OF AN EXAMPLE OF IMPLEMENTATION OF

THE INVENTION

  A description of an example of the invention is given below, with reference to

  referring to the numbering adopted in the Figures.

  Thus, the most striking characteristic of this exemplary embodiment consists in that the mouth 2 of the sachet l has an adhesive zone 3 which gives said sachet i a total seal, making it impossible to accidentally open it or any loss of liquid once that the desired closure has been performed, which eliminates drawbacks such as having to close the bag by heat sealing, and facilitates the closure and, in addition, eliminates the

  machinery and labor required for said heat sealing.

  The aforementioned adhesive area 3 is visible in Figure i and it consists of a double-sided adhesive tape which adheres strongly to the open ends of the sachet, once the corresponding protective tape 4 placed on one of the sides of the adhesive, this tape 4 not having been shown in Figure i

for the clarity of the drawing.

  Another characteristic of the sachet of this example is the elimination of any type of aluminized product in each of the interior or exterior layers which form it, with the main objective that the frozen fish or food introduced into the interior cavity of the sachet can be thawed directly in a microwave oven, without having to empty the food from the inside of the sachet, thus providing the advantage of not having to open the

  sachet before needing the product to use it.

  In addition, the hermetic closure which is ensured by the sachet of the present example brings the advantage of an easy handling for its closure and gives the sachet a total seal during the transport of the product, avoiding odors, accidental spills of liquids and other classic problems

  handling and transporting certain foods.

  On the other hand, provision has been made for the bag to include one or more windows made of transparent material 6 which will allow the contents of the bag to be seen.

  if necessary, as shown in Figure 2.

  The protective tape 4 which protects the adhesive area 3 may have a tab, a tab or the like 5 which extends beyond the general geometry of the bag 1, to facilitate its detachment before the closure of the bag 1,

  this possibility being shown in Figure 2.

  Essentially two arrangements have been made for the conformation of the constituent sheets of the bag 1, the sections of which correspond to those of

Figures 3 and 4.

  Thus, the isothermal bag corresponding to Figure 3 is intended for frozen products, mainly fish, and it is formed of three sheets; an outer polyethylene layer 7, a central paper layer 8 and an inner polyethylene layer 9; these sheets or layers being thin, so that the total dimension of the sheets is analogous to a conventional packaging, at the same time that the sachet is given a total

  sealing to allow the introduction of fresh food inside.

  On the other hand, the sachet corresponding to Figure 4 is an embodiment intended for cases which require lower isothermal properties and it is intended for foods such as meat or cold meats, the corresponding sachet being formed of two sheets; an inner layer of polyethylene 10 and an outer layer of paper 11. Optionally, this layer of paper 11 can be a

  paper that absorbs fat due to the handling of this type of food.

Claims (5)

  1. Improved isothermal bag for food which is formed from one or more flexible sheets formed from a base (8, 11) of which one or more of the faces is or are plasticized with a thin plastic film (7 , 9, 10), these sheets being joined along their edges, with the exception of one side which forms a mouth (2) for introducing food, characterized in that said mouth (2) present on at least one of its inner sides an adhesive zone (3) which allows a sealed closure of the bag after having removed a protective tape (4).   2. Improved isothermal bag for food according to claim 1, characterized in that said protective tape (4) of the adhesive area (3) has a tab or tab (5) which projects beyond the general geometric shape of the bag   to allow it to be easily grasped in order to take it off.   3. Improved isothermal bag for food according to claim 1, characterized in that said sheets optionally have one or more windows (6) in transparent material which allows (tent) to see the food present inside the bag.   4. Isothermal bag for food according to claim 1, characterized in that each of said sheets has, in section, an outer layer of polyethylene (7), a central paper base (8) and an inner layer of polyethylene (9).   5. Isothermal bag for food according to claim 1, characterized in that each of said sheets has, in section, an outer base in   paper (it) and an inner layer of polyethylene (10).