WO2014102513A1

WO2014102513A1 - Food sachet with an improved grip area, method for producing the sachet, and facility for producing the corresponding sachet

Info

Publication number: WO2014102513A1
Application number: PCT/FR2013/053273
Authority: WO
Inventors: Damien Denis FREREJEAN
Original assignee: Panzani
Priority date: 2012-12-27
Filing date: 2013-12-27
Publication date: 2014-07-03
Also published as: FR3000474A1; FR3000474B1; EP2938551A1; EP2938551B1; PT2938551T; ES2854992T3

Abstract

The invention relates to a food sachet (1) for containing a dose of food and for placing in a heating fluid in order to cook or heat said dose of food, said sachet (1) being provided with a protruding outer rim (2) that is integral with the sachet (1) and extends longitudinally along the surface (3) of said sachet (1) in order to provide a grip therefor, said sachet (1) being characterised in that the protruding outer rim (2) has a surface (3) projection (4) facing the rest of the rim in such a way as to form the favoured grip area of the sachet (1). The sachet is used to cook or to heat a dose of food.

Description

BAG FOR FOOD .A IMPROVED GRIPPING AREA, PROCESS FOR MANUFACTURING THE BAG AND BAG PRODUCTION PLANT

CORRESPONDING

TECHNICAL FIELD The present invention relates to the general technical field of containers or sachets used in the food industry for containing doses of food intended for human and / or animal consumption.

The present invention relates more particularly, but not exclusively, to bags intended to be introduced into a heating fluid ensuring the transformation of 1'aitement inside the bag, such as cooking bags or heating cereal grains by water absorption.

The present invention more particularly relates to a food bag for containing a dose of food and to be introduced into a heating fluid to cook or heat said dose of nutrients, said bag being provided with a projecting external rim which came from material with the bag and extending fongitudinally along the surface of said bag to ensure its grip.

The present invention also relates to a method of manufacturing food bags, each bag being intended to contain a dose of food and to be introduced into a heating fluid to cook or heat said dose of food, in which process;

^■ ~ the bags are made from a plastic film forming a width, which plastic film is caused to move in a direction of travel,

during its displacement, and for each bag of food to be manufactured, the plastic film is successively shaped to form a volume for receiving a dose of food, said volume being filled with a dose of food and closed at both ends by two weld lines to form a succession of feed bags separated by the two weld lines, each feed bag being separated from the immediately preceding pouch and immediately next by a first and a second respective cutting lines made at each weld line.

Finally, the present invention relates to a facility for manufacturing food bags for containing a dose of food and to be introduced into a heating fluid to cook or heat said food dose comprising:

means for supporting a film, preferably a plastic film, from which your food bags are made and drive means intended to ensure the running of the film,

film forming means for producing a bag having a shape and a volume suitable for receiving and storing a dose of food,

sachet feeding means capable of supplying a dose of food,

film cutting means for producing and then separating the bags from the film,

welding means for closing the bags.

PRIOR ART Food sachets containing a dose of food are already known, the sachet being intended to be introduced into a heating fluid, generally hot or boiling water, to cook or heat the dose of food contained in the food. bag.

These sachets, known as "cooking bags" are generally provided with perforations and made of a flexible plastic material thus allowing the hot water to penetrate into the bags and to achieve the cooking of the dose of food, for example the rice, contained in the bag.

The known bags are generally provided with a projecting outer edge which is integral with the bag and which extends longitudinally along the surface of said bag to ensure its grip. The protruding edge is generally made by welding the plastic film constituting the bag during the manufacture of the bag, for example during shaping and soldering steps. This protruding outer edge serves as a gripping means of the bag If it proves that the presence of such a projecting outer rim facilitates the gripping of the bag when the cooking is over, the fact remains that the food bags of the prior art suffer from several disadvantages. In the first place, it turns out, in particular for the cooking bags, that the "visual" identification of the precise gripping zone is not easy, the projecting external edge being difficult to identify and confused with the general lines of the shape external sachets of the known prior art. This complicates the extraction operation of the bag out of the cooking liquid by the user. Risk of burns is not excluded, if the user tries to move the bag within the hot liquid to highlight the gripping area. In the same way, if the user tries to use gripping tools, such as a fork, for example, there is a risk of breakage or piercing of the outer casing of the bag. Secondly, and in addition to the difficulties of locating the gripping zone, it turns out that the bags of the prior art known do not have a gripping zone likely to provide the user with a security of seizure then of handling.

The bags of the known prior art, and in particular the rice cooking bags therefore have a certain number of disadvantages that the present invention proposes to overcome while facilitating and simplifying its industrial manufacture in the context of an installation of particularly efficient production.

PRESENTATION OF THE INVENTIO

The objects assigned to the invention therefore aim to remedy the various drawbacks enumerated above and to propose a new food bag, a new method of manufacturing food bags, and a new food bag manufacturing facility which allows a identification and particularly easy handling of the bag introduced into its cooking fluid while by facilitating its manufacture and by proposing an installation intended for its manufacture which is particularly powerful.

Another object of the invention is to propose a new food bag, as well as a new manufacturing process and a new manufacturing facility to obtain a food bag whose profile or conformation is particularly suitable for a good one. visual identification of the bag in the cooking fluid, good handling and simplified industrial production.

Another object of the invention is to propose a new food bag, as well as a new manufacturing process and a new manufacturing facility which makes it possible to obtain a particularly resistant bag when it is handled and extracted out of the fluid. cooking with the aid ^of an external tool without breaking the bag while being simple to manufacture in an efficient manufacturing facility.

Another object of the invention is to propose a new food bag, as well as a new manufacturing process and a new manufacturing facility to obtain a bag which, while being particularly resistant, especially in the fragile areas of easy opening, is particularly robust and is obtained in particularly advantageous economic conditions.

Another object of the invention is to propose a new food bag particularly suitable for cooking in hot water and which is able to take itself a positioning oriented in the cooking liquid may facilitate its identification and its gripping by the user when the cooking is finished.

Another object of the invention is to propose a new food bag, as well as a new manufacturing process and a new manufacturing facility to obtain a particularly strong bag, the manufacturing process being particularly simplified and the installation d manufacturing being particularly economical tors de operation.

The objects assigned to the invention are achieved by means of a food bag intended for to contain a dose of food and to be introduced into a heating fluid to cook or heat said dose of food, said bag being provided with a projecting outer edge which is integral with the bag and which extends longitudinally; along the surface o ^' udsi bag to ensure its grip, said bag being characterized in that the projecting outer edge has a zone of surface protrusion facing the rest of the border so as to form the preferred gripping zone of the bag .

The objects assigned to the invention are also achieved by means of a method of manufacturing food bags, each bag being intended to contain a dose of food and to be introduced into a heating fluid to cook or heat said dose. in which:

the bags are made from a plastic film forming a width, which plastic film is caused to move in a direction of movement,

during its displacement and for each bag of food to be produced, the plastic film is successively shaped to form a volume for receiving a dose of food, said volume being filled with a dose of food and closed at both ends by two solder marks to form a succession of food bags separated by the two welding lines, each food bag being separated from the immediately preceding bag and immediately following by a first and a second cutting line respective at each weld line, said method being characterized in that;

at least one of the two weld lines is made in the form of a protruding outer edge within which the first cutting line is made between two successive food bags, said first cutting line being non-rectilinear of so as to allow the creation, on each of the bags to be separated, an area of surface protrusion facing the rest of the projecting outer edge.

The objects assigned to the invention are also achieved by means of a facility for manufacturing food bags intended to contain a dose of food and to be introduced into a heating fluid for leather or to heat said dose of food comprising : - means for supporting ^a film, preferably plastic, from which food bags are made and drive means for ensuring the unwinding of the film,

~ means for shaping the film to produce a bag having a shape and a volume suitable for receiving and storing a dose of food,

sachet feeding means capable of supplying a dose of food,

film cutting means for producing and then separating the bags from the film,

welding means for closing the bags, said installation being characterized in that: the cutting means comprise at least one cutting blade with a non-rectiiigne profile intended for cutting the film to separate two successive bags so as to allow the creating, on each of the two bags to be separated, a surface protrusion zone so as to create a preferred grip area on each separate food bag, SUMMARY DESCRIPTION OF THE DRAWINGS

Other advantages and objects of the invention will appear in more detail on reading the description which follows, and with the aid of the accompanying drawings provided for purely explanatory and non-limiting purposes in which:

- Figure 1 illustrates, in a side view, a preferred embodiment of a pouch according to the invention.

- Figure 2 shows, in a side view, the preferential cutting profile between two successive packets according to the invention during the manufacturing process according to ^the invention.

FIG. 3 illustrates, in a view from above, a preferred example of the structure of a film, preferably a plastic film, used in a manufacturing process and in a manufacturing facility in accordance with the invention to obtain a food bag. according to the invention. - Figure 4 Illustrates in a perspective view, a detail of an embodiment of a manufacturing plant according to the invention illustrating its cutting and welding of two successive bags according to [invention.

FIG. 5 illustrates an embodiment detail of a manufacturing installation according to the invention illustrating the production of cutting jaws and welding jaws.

- Figure 6 illustrates a detail of a preferred variant of a cutting blade integrated in a manufacturing facility according to the invention.

FIG. 7 illustrates, in a perspective view, a detail of embodiment of shaping, welding and cutting means integrated in a manufacturing installation according to the invention.

BEST WAY TO CARRY OUT THE INVENTION

Figures 1, 2 and 4 illustrate a food bag according to the invention and obtained from a flexible film, in particular a flexible plastic film, preferably high density polyethylene (PEND), or polypropylene or polyethylene terephthalate (PET), which flexible film is successively shaped to form an open bag at one end, then filled with a dose of food to finally be closed to form a food bag containing a dose food. Advantageously, the bag 1 according to the invention is intended to be introduced into a cooking or heating fluid, preferably water, so that the dose of food can be cooked or reheated. The bag 1 according to the invention is therefore advantageously a cooking bag.

In the following description, i! reference will more particularly be made to a food bag intended to contain and containing a dose of food which consists of a dose of cereals, and in particular a dose of rice intended for human consumption. Nevertheless, within the meaning of the invention the food bag can obviously contain a dose of food consisting of a cereal or a food other than rice without departing from the scope of the invention. You! illustrated in particular in FIG. 1, the food bag 1 is intended to contain a dose of food, such as rice, and to be introduced into a heating fluid to cook or heat said dose of food, said sachet being provided with a protruding outer edge 2 which is integral with the bag and which extends iongitucinally along the outer surface 3 of the bag projecting to ensure its grip.

As illustrated in the figures, the projecting outer edge 2 has a zone of surface protrusion 4 facing the remainder of the edge which is therefore of a smaller radial dimension so that the surface protrusion region 4 forms the preferred gripping zone of the bag 1, the area of protrusion of surface 4 thus extends the outer rim of the art 2, preferably in the same plane.

According to a particularly advantageous version of the invention, the projecting outer edge 2 has a profile composed of successive waves V1, V2, Y3 decreasing in height from the protrusion zone 4 which thus forms a flag 5 located at one end. of said projecting outer edge 2.

According to the preferred variant of the invention illustrated in FIGS. 1 and 2, the profile of the successive waves V1, V2, V3 is rectilinear, each wave being of constant height from the surface 4, the last wave V3, that opposed to the vagu V1 the highest formed by the flag 5, being advantageously coincides with the surface 3 of the bag 1. Alternatively, the waves may have a different profile and for example, while being generally rectilinear, may be crenellated.

With this conformation, there is a food bag which is provided with a gripping area immediately visually identifiable and easily manipuiabie by the user because of a large area relative to the rest of the outer edge 2 protruding.

Such an embodiment is also particularly economical by minimizing the amount of flexible film required and contributes to the overall strength of the bag 1. Advantageously, the projecting outer edge 2 may also be provided with a notch 7 or slot or any means equivalent in the sense of the invention for the passage of a gripping tool of the fork type. Thus, not only is the food bag according to the invention easily identifiable and easily grasped by the user because of the protuberance constituted by the flag 5, but can it be easily handled and extracted from the hot fluid, without risk of burns by ^the user, with the aid of the notch 7. the achievement of a notch 7 can be performed regardless of the embodiment of a non-rectilinear cutting leading to an area of protuberance 4 so that this feature and the associated features may constitute an independent invention.

According to the preferred versions illustrated in FIGS. 1 and 2, the projecting external edge 2 is formed by three successive waves and decreasing heights of height, the first wave V1 being the highest and comprising the flag 5, the notch 7 extending to horse on the first wave V1 and your second wave \ I2 ,. the third wave V3 is substantially coplanar and coincides with the surface 3 of the bag.

This gives a characteristic profile of successive waves and rectilinear constituting a projecting outer edge and thin thickness corresponding substantially to a double thickness of the flexible film constituting the bag and projecting out of the side faces of the bag.

According to a particularly advantageous version of the invention, the projecting external rim 2 comprises a terminal weld 10 resulting from the welding of two thicknesses of the constituent film of the bag 1 and extending over the entire length of said projecting external rim 2, a weld peripheral 1 1, total or partial around the notch 7 or the bordering and reinforcement welds 12 on either side of a breaking primer 13 formed in the protruding outer edge 2, preferably in the second wave V2 .

As illustrated, the peripheral weld 11 may extend only over a portion of its periphery of the notch 7, which advantageously has a circular oval or flattened circular form forming an oblong hole, the latter form being the preferred and illustrated form.

The presence of its terminal weld 10 and in particular of a peripheral weld 11 around the notch 7 provides good tensile strength and protects any unexpected opening of the bag by unwanted tearing of the opening primer 13.

As illustrated, the opening primer 13 is formed in the second wave V2, and substantially in its middle part, so that the two reinforcing welds 12 extend from the surface 3 of the bag towards the outside of the bag to intercept the terminal weld 11 from the welding of two thicknesses of the flexible film constituting the bag.

The presence of successive waves differentiated forming gripping zones naturally spotted and easily grasped by the user, and in particular the presence of a flag largely projecting continuing with a second wave V2 also salient, but to a lesser degree, provides a natural gesture of grasping and opening a bag according to the invention. The user is indeed driven instinctively to grab the bag 1 by pinching with the thumb in the index finger of one hand at the flag 5 and also to pinch with the forefinger and thumb of the other hand the second wave V2 (noted A in his figures). I! can then make a movement substantially perpendicular to the extension directio of the opening primer 13 which generates the opening of the bag.

According to a particularly advantageous version of the invention illustrated in FIGS. 1 and 2, the bag 1 presents:

at least one permeability zone 21 to said heating fluid allowing firstly bringing the heating fluid into contact with said dose of food to cook or heat it and, secondly, creating, within the volume of the sachet, a flow of fluid vapor emitted from the heating fluid during cooking or heating of the dose of food,

and at least one zone 20 of impermeability to the heating fluid for at least partially retaining the flow of fluid vapor inside said bag in order to allow at least partial emersion of said bag in the heating fluid. Thus, according to a particularly advantageous version of the invention, the bag 1 is made from a flexible plastic film whose outer walls have at least two zones with distinct physical properties, one, the permeability zone 21, allowing the heating fluid to penetrate inside the internal volume of the bag, the other, the impervious zone 20 does not allow this penetration and is therefore substantially sealed.

Particularly advantageously, the permeability zone 21 comprises at least one perforation 22, and preferably a series of perforations 22, designed to allow the heating fluid to come into contact with the dose of food contained inside the sachet. 1.

Finally, as illustrated, the preferred general shape of the bag 1 according to the invention is substantially comparable to that of a polyhedron, it being understood that ^other geometric shapes defining a container and suscepiibles to contain a dose of food can be considered within the meaning of the invention without departing from its scope.

More particularly, the bag according to the invention has a substantially assimilable form, as illustrated, to that ^of a tetrahedron, thus having four substantially flat sides Its zone of impermeability 20 being located at at least one of the corners 24 of said polyhedron and / or the tetrahedron, Te! As indicated above, the dose of food is preferably formed by cereal grains and, even more preferably, by grains of rice, for example of the Indica type, or even Japonic or Java ica.

Thus, the dose of food contained inside the bag is preferably a food product intended for human food whose porosity and surface characteristics allow it to absorb a quantity of water, to undergo a transformation of the type Cooking. After taking a liquid intended to modify its biochemical characteristics, the dose of food is adapted to human and / or animal consumption possibly. Alternatively, the dose of food could consist of grains from a cereal other than rice, and for example from corn, millet or any other cereal, the food dose may even consist of a Meal of several grains of cereals of different origins. For information only, the. dose of food can be substantially between 60 and 250 g of raw food, preferably between 80 and 180 g.

Generally, the internal volume of the bag has a sufficiently large internal volume to accommodate the dose of afiments and to allow ^the establishment of substantially simultaneously, the flow of heating fluid and its associated vapor stream so as to enable a transformation of the food dose and an increase in its volume after cooking and absorption of a certain quantity of heating fluid.

As illustrated in FIGS. 1 and 2, the preferred form of the feed bag 1 according to the invention is substantially tei-orthetic and corresponds substantially to the shape of a pyramid whose edges are substantially equal, or even unequal, according to a variant of FIG. embodiment not illustrated in the figures.

According to the invention Its impervious zone 20, of generally frustoconical general shape, allows at least partially retaining the flow of fluid vapor inside the bag in order to allow at least partial emersion of the bag out of the volume of the fluid heating

The area ^of protrusion 4, and in particular the flag 5 is disposed projecting radially from the permeability of zone 21, the growth zone 4 is naturally led to emerge. This allows a particularly easy gripping of the bag while allowing, conversely, a positioning of the bag in a natural cooking position in which the permeability zone 21 is below the impervious zone 20 and is intended for emerge out of the heating fluid.

According to the preferred form illustrated in the figures, the bag 1 according to the invention is formed by a polyhedron with edges 25 _: the projecting external border 2 projecting from one of the ridges 25.

Even more ^preferential manner, the polyhedron is a tetrahedron formed by uniformly and preferably regular. Alternatively, the bag 1 according to the invention can of course have various shapes and for example be formed by a cube or octahedron.

According to the preferred embodiment, the tetrahedron-shaped sachet 1 has a zone of impermeability which forms one of the corners of the tetrahedron, the flag 5 then soiled from said impermeability zone 20 (FIG. can thus immediately identify the preferred position of introduction of the bag 1, which can then be introduced into the hot water with the impervious zone 20 disposed above the permeability zone 21.

The invention also relates to a method of manufacturing food bags, each bag being intended to contain a dose of food and to be introduced into a heating fluid to cook or heat said dose of food.

As schematically illustrated in FIG. 3, the pouches 1 according to the invention are made from a plastic film 30 (FIG. 3) forming a web, which plastic film 30 is caused to move in accordance with a direction of travel O, corresponding to the median axis XX 'of said film 30. According to the invention, during its movement and for each food bag 1 to be manufactured, the plastic film 30, preferably flexible, is successively set shaped to form a volume for receiving a dose of food, said volume being filled with a dose of food and closed at both ends by two weld lines (which may be in the form of solder strips ) to form a succession of food bags separated by the two weld lines, each food bag being separated from the immediately preceding pouch and immediately following by respective first and second cutting lines 40, 50 s at each weld line. As illustrated in FIG. 4, the plastic film 30 is shaped around a tube 31 by sliding on a so-called "marine part" 32.

Subsequently, its two side edges 33, 34 of the plastic film are grouped outside the tube to be superimposed so that we can achieve an initial and longitudinal weld 35 finishing the shaping step.

According to the invention, and particularly advantageously, the shaping of the plastic film comprises a longitudinal welding step flesh-flesh or flesh-leather side edges 33, 34.

The longitudinal weld 35 is advantageously made using rotating welding discs 36 forming a pair of discs mounted facing the tube 31, the said rotating discs 38 being retractable.

Alternatively, the weld 35 can be performed by a heated segment performing reciprocating motion.

Advantageously, the film surplus resulting from the weld 35 can be sliced flush with the longitudinal weld 35 by any suitable means well known to those skilled in the art.

After completion of the longitudinal weld 35, the bag 1 being formed is then closed at its two ends by two weld lines, at least one of the two weld lines being made in the form of a protruding outer edge 2 in which the first cutting line 40 is made between two successive bags 51, S2, said first cutting line 40 being non-reclineable so as to allow the creation on each of the bags to be separated, a zone d surface protrusion 4 facing the rest of the protruding outer edge 2.

According to an advantageous version of the invention, the first cutting line 40 is made so as to present on each separate bag S1, S2, a complementary profile composed of successive waves, for example V1, V2. V3, of decreasing height from the zone ^of protrusion 4, which thus forms a flag 5 located at one end of said first cut line 40. Advantageously, according to the method according to the invention, simultaneously with the production of the first cutting line 40, the protruding outer edge 2 is perforated to produce a notch 7, preferably oblong, intended for the passage of a gripping tool. of the fork type, according to the method of the invention, successive waves consisting of three successive and continuous waves V1, V2, V3 of decreasing heights are produced, the first wave VI being the highest and comprising the flag 5, the notch. 7 ^extending astride ia V1 first wave and the second wave V2, V3 the third wave being substantially copianaire and confused with ia surface 3 of the bag 1. According to a particularly advantageous characteristic of the invention, the first cut line 40 is produced simultaneously on the two bags S1, S2 intended to be separated, with: a terminal weld 10 forming the actual edge of the first cutting line 40, a peripheral weld 11 around the notch 7 and two reinforcing welds 12 of graters and other an opening primer 13 formed in the projecting outer edge 2 preferably in the second wave V2. The terminal weld 10 thus has a profile in successive waves.

According to one feature of the invention that may be the subject of an invention as such and apart, is performed ia producing the bags ^of food 1 from a film, preferably oriented plastic and forming a width, extending along a longitudinal axis and median X ~ X ^" coincident with scrolling tax D, said film having two lateral edges 33, 34 between which extend a succession of longitudinal sections SI provided with perforations 22, which sections SL longitudinal are separated from each other by transverse areas 41 devoid of perforations and extending substantially perpendicular to the side edges 33, 34, said film having a succession of transverse areas 41 which are alternately formed by non-perforated transverse strips 42 and by non-perforated transverse bands 43, each transverse strip 43 continuing on either side of the transverse strip 43 and on both sides of the median axis XX ^' of the plastic film 30 by an additional non-perforated surface 44. Advantageously, each non-perforated supplementary surface 44 has a shape half-hexagon as shown in Figure 3. Of course, other forms are possible, and for example semicircles, triangles or quadrilaterals for example.

With this arrangement, and after making a longitudinal weld 35 and two transverse weld lines for closing the bag after filling and cutting within the seams iransversales, can be obtained a bag i according to the invention, preferably of tetrahedral form, whose impermeability zone 20 is obtained from the unperforated supplementary surface 44, which are adjacent or adjacent and bordered by a zone of protrusion-4 forming a flag 5,

According to another feature possibly independent of the invention, the lateral edges 33, 34 are provided with a series of marks 46 so that the exact position of the film 30 can be detected during its movement by detecting the position of the marks 46 using external sensors (not shown) to manage the cutting cycle.

According to an advantageous variant of the invention, the marks 46 are formed by bores, preferably three bores in line. The bores are thus aligned along a straight line substantially perpendicular to the median axis XX ¹ and advantageously arranged within the transverse zones 41 and at the side edges 33, 34. As illustrated in FIG. 3, the plastic film used in the invention comprises two visual markers 46 formed on each side and at both ends of the transverse strips 43 within the lateral edges 33, 34 and a single mark 46 formed within each transverse strip 42 in one of the lateral edges 33 or 34 on either side of said strip. Particularly advantageously, the bores are made simultaneously with the perforations 22 in the plastic film, this obviously simplifies the drilling operation of the plastic film 30.

For the purposes of the invention, the production of the perforations 22 in the plastic film and / or holes for forming the visual cues 48 can be made during the actual process of manufacturing the bags 1 or on the contrary outside the steps of the same process of manufacturing the bags, the plastic film 30 used during the manufacturing process being already provided perforations 22 and holes made for example on another industrial site or on another installation.

According to the manufacturing method according to the invention, the scrolling of the film 30 may at least partly be provided by the displacement of cutting means which are used to ensure the separation of the bags 1 after their closure.

Finally, according to the process according to the invention, each food bag 1 is separated from the two immediately adjacent bags by the first cutting line 40, which forms a non-rectilinear cut and by the second cutting sign 50, which forms a rectilinear cut (Figure 2). For general understanding of the invention and to show how pouches 1 are formed and scrolled, the second cutting line 50 (i.e. straight cutting) is illustrated in FIG. bag still bound to the previous bag S.2 while in practice it is already separated, the second cutting line 50 having already been made.

As illustrated, the second rows of straight cutouts 50 are made at and within each transverse strip 42, while the first recut cutting lines 40 are made within and at each transverse strip. 43.

Without departing from the scope of the invention, it will be possible to separate each food bag 1 from the two immediately adjacent bags on the one hand by the first cutting line 40, d-forming a non-rectilinear cutout intended to create, on each of 1 separate bags, the protrusion region 4 of surface 3, and secondly by the second cutting line 50, the latter also forming a non-rectilinear cut, and whose profile is different from that of the first line of cutout 40, to form, for each bag 1, a non-rectilinear bag base 1. In this case, of course, the form and the width of the transverse weld line relative to the bottom of the two bags 1 concerned will be adapted to accommodate the second non-rectilinear cutting line 50. The invention also relates to an installation for manufacturing food bags intended to contain a dose of food and to be introduced into a heating fluid for cooking or heating said dose of food, said manufacturing facility comprising: - support means a film, preferably plastic and oriented, from which the food bags 1 are made and drive means for ensuring the scrolling of the film; such technical means are conventional and well known to those skilled in the art,

- Formatting means 32, 31 of the film 30 for producing a bag 1 having a shape and a volume suitable for receiving and storing a dose of food; the forming means of the invention can thus be formed by the "sailor collar" 32 associated with the tube 31 mounted in a vertical position within said sailor collar 32,

means ^for feeding the sachets capable of providing a dose of food; such means are well known to those skilled in the art, the dose of food can be delivered through a suitable conduit to the lower tube 21 at the neck of sailor 32,

- Cutting means 52 of the film for producing and then separating the bags 1 of the film 30, - welding means for closing the bags.

According to an important characteristic of the manufacturing facility according to the invention, its cutting means 52 comprise at least one cutting blade 53 (FIG. 6) with a non-rectilinear profile intended for cutting the film 30 to separate two successive bags Si , S2 so as to allow its creation, on each of the two sachets SI, S2 to be separated, a surface protrusion zone 4 so as to create a preferred grip area on each separate food bag 1.

Teis illustrated in particular in Figures 4 and 7, the cutting means 52 comprise at. less a straight cutting blade 55 mounted in synchronous association with said at least one non-rectilinear cutting blade 53 as illustrated in particular in FIG. Figure 6, the non-rectified cutting blade 53 having a profile in successive waves.

Alternatively (not shown in the figures), the cutting means 52 comprise at least a second non-rectii cutting blade with a profile different from that of the recessing cutting blade 53.

As illustrated, the non-recess cutting blade 53 is in the form of a metal blade with a sharp cutting edge 53B and, for example, crenellated, the successive waves V1, V2, V3 extending into extension shafts. separate and staggered or substantially parallel and connected by a curved area 53C. As illustrated in FIG. 6, the non-recess cutting blade 53 may be associated with a specific cutting member 57 intended to form the notch 7 by cutting and positioned astride a curved zone 53C to extend to riding on waves V2 and V3.

Advantageously, the cutting means 52 comprise a pair of straight blades 55 and. a pair of non-rectilinear blades 53 respectively arranged in facing relation to alternately and continuously producing, during the movement of the food bags S S2, a first cutting line 40 forming a non-rectiin cutout and a second cutting line; 50 forming a rectiiigne cut.

As illustrated in FIG. 4, the pair of non-rectilinear blades 53 is in the welding and cutting position, whereas the pair of rectilinear blades 55 angularly offset by 90 degrees is in a standby position remote from the food bags. separate by cutting.

Advantageously, and as illustrated in FIG. 7, each pair of cutting means 52, 53 is secured to radially moving jaws 60 according to the arrows F according to an alternating cycle so as to alternately cut the bags 1 in a rectiiigne section and a non-rectiiigne cut as the scroll of the plastic film 30.

Advantageously, the pairs of rectilinear blades 55 and non-rectilinear 53 are mounted via the jaw 80 on a movable platen 62 whose movement is synchronized with the movement of the plastic fi lm 30 to follow its movement.

As illustrated in FIG. 7, the movable plate 62 moves in a direction R, preferably in a vertical plane, which is substantially parallel and in the same direction to the running direction D of the film 30, the direction R being substantially orthogonal to the displacement of the jaws 60, preferably in a horizontal plane.

Advantageously, said at least one non-rectilinear cutting sound 53 is embedded in the welding means 85 so as to substantially simultaneously produce the cutting and welding of each bag 1, the non-rectilinear cutting blade 53 being actuated by a jack (no represents) embedded on the movable jaw 60. Thus, the welding is first carried out while the two jaws 60 compress the two thicknesses of the film 30, then the jack being actuated, the non-rectilinear cutting blade 53 moves and cuts the weld line during the step of compression of the two jaws 60, the cutout being performed in masked time.

As ^illustrated in Figure 5, the sealing means 85 is secured, by any suitable means, for example by screwing with the jaws 60, The non-rectilinear cutting blade 53 being embedded within the sealing means 65 of in order to be able to substantially simultaneously perform the welding and cutting operation in masked time. The same type of integrated assembly can obviously be achieved with rectified cutting blades 55 which are also integrated with the welding means used to simultaneously perform the welding of the rectilinear cut. The invention thus not only allows to obtain bags ^of food whose position is easily spotted visually by the user to be introduced in a preferred position in the cooking liquid and are readily martipulabies without risk of burns while allowing particularly efficient and economical bag manufacture by minimizing the losses of plastic material during cutting. It also turns out that the bag obtained is particularly resistant, particularly at the level of the welds.

POSSIBILITIES OF INDUSTRIAL APPLICATION

The invention finds its industrial application in the design, implementation and manufacture of food bags, in particular cooking bags.

Claims

Sachet {1} food for containing a dose of food and to be introduced into a heating medium for cooking or heating said dose food, said bag (1) being provided ^with a protruding outer rim (2) which is integral with ie bag (1) and which ^extends longitudinally along the surface (3) dudiî sacheî (1) to ensure its gripping, said bag (1) being characterized in that the protruding outer rim (2) has an area of protrusion (4) surface (3) facing the rest of the border so as to form the preferred gripping area of the bag (1).

Bag (1) according to revendicatio 1 characterized in that the projecting outer edge (2) has a profile composed of successive waves of decreasing heights starting from the protrusion zone (4), which thus forms a flag (S) located at one end of said border.

Bag (1) according to claim 1 or claim 2 characterized in that the projecting outer edge (2) is provided with a notch (7) for the passage of a gripping tool of the fork type.

Bag (1) according to claims 2 and 3 characterized in that the projecting outer edge (2) is formed by three successive waves and decreasing decreasing heights, the first wave VI being its highest and comprising the flag (5), the notch (7) extending over the first and second waves V2, its third wave V3 being substantially copanar with the surface (3) of the bag (1),

Bag (1) according to one of claims 3 or 4, characterized in that the protruding outer edge (2) comprises a terminal weld (10), a peripheral weld (11) around the notch (7) and two welds of reinforcement on both sides of an opening primer (13) formed in the protruding outer edge (2), preferably in the second wave V2. - Sacheî (1) according to one of the preceding claims characterized in that it is formed by a polyhedron with edges (25), the outer edge protruding (2). Projecting from one of the ridges (25). - Bag (1) according to claim 6 characterized in that the polyhedron is formed by a tetrahedron, preferably uniform and regular. ~ Bag (1) according to any one of the preceding claims characterized in that it comprises:

at least one zone of permeability (21) to said heating fluid making it possible, on the one hand, to bring said heating fluid into contact with said dose of food to cook or heat it and, on the other hand, to create, within said know (1), a flow of fluid vapor from the. heating fluid during cooking or heating of the food dose,

~ and at least one impervious region (20) to the heating fluid to at least partially retain the flow of fluid vapor inside said bag (1), to allow an emersion, at least partial, of said bag (1 ) in the heating fluid. - Sachet (1) according to claim 8 characterized in that the impervious zone (20) forms one of the corners (24) of the tetrahedron, the protrusion zone (5) projecting from said zone of Impermeability (20), - Bag (1) according to claims 8 or 9 characterized in that the permeability zone (21) comprises at least one perforation (22) designed to allow the contact of said heating fluid with said dose of food, 1 -Sachet (1) according to one of the preceding claims characterized in that it is made of a flexible plastic material, preferably high density polyethylene (PEND), polypropylene or polyethylene iéréphtaiate (PET). -Sacheî (1) according to one of the preceding claims characterized in that the dose of food is formed by cereal grains, preferably by grains of rice. - Method for producing bags (1) for food, each pouch {1} being intended to contain a dose of food and to be introduced into a heating medium for cooking or heating said dose ^of food in iequei;

the bags (1) are made from a plastic film (30) forming a width, which plastic film (30) is caused to move in a direction of travel,

during its displacement and for each bag (1) of food to be manufactured, the plastic film (30) is successively shaped to form a volume for receiving a dose of food, said volum being filled with a dose of food and closed at both ends by two weld lines to form a succession of bags (1) of food separated by its two weld lines, each bag (1) of food being separated from the bag ( 1) immediately preceding and immediately following by first and second cutting lines (40, 50) respectively made at each weld line, said method being characterized in that:

At least one of the two welding lines is produced in the form of a protruding outer edge (2) within which the first cutting line (40) is made between two successive food bags (1); cutting line (40) being non reetïHgne so as to allow the creation, on each of the bags (1) to be separated, ^an area of projection (4) of surface (3) opposite the rest of the edge external projection (2). - Method according to claim 13 characterized in that the first cutting line (40) is formed so as to present on each separate bag (1), a complementary profile consisting of successive waves of decreasing heights from the outgrowth zone (4), which thus forms a flag (5) located at one end of said cutting line (40). -Method according to claim 13 o the revendicatio 14 characterized in that simultaneously with the production of the first cutting line (40), the protruding external edge (2) is perforated to produce a notch (7) intended for the passage of a gripping tool, fork type. - Process according to claim 15 characterized in that one realizes successive waves composed of three successive waves and continuous decreasing heights, ia. first wave VI being the highest and including the flag (5), the notch (7) extending astride the first and second wave V2, the third wave V3 being substantially coplanar with the surface (3) of the bag ( 1). - Method according to one of claims 15 or 16 characterized in that is carried out simultaneously on the two bags (1) to be separated, the cutting line (40) with: a terminal weld (10), a weld peripheral (1.1) around the notch (7) and two reinforcing welds on both sides of an opening primer (13) formed in the border, preferably in the second wave V2. Process according to one of Claims 13 to 17, characterized in that its manufacture of food bags (1) is carried out from a film (30), preferably plastic, forming a width extending in a manner longitudinal axis confused with

Running wheel, said film (30) having two lateral edges (33, 34) between which extend a succession of longitudinal sections provided with perforations (22), which longitudinal sections are separated from each other by transverse zones (41) devoid of with perforations (22) and extending substantially perpendicular to the lateral edges, said film (30) having a succession of transverse zones (41) which are alternately formed by transverse non-perforated bands (42) and transverse bands (43) not perforated continuing on both sides of the transverse strip and on either side of the median axis of the plastic film (30) by an additional nonperforated surface (3). - Method according to claim 18 characterized in that each additional surface (3) has a half-hexagon shape. 20 - Method according to claim 18 or 19 characterized in that the side edges are provided with a series of marks (46) so that the exact position of the film (30) is detected during its movement by detecting the position markers using sensors to ensure the management of the cut cycle. 21 - A method according to claim 20 characterized in that the marks are formed by holes, preferably three holes in line.

22 - Process according to claim 21 characterized in that (b) holes are made simultaneously to the realization of the perforations (22) in the plastic fii (30).

23 - Method according to one of claims 13 to 22 characterized in that the shaping of the plastic film (30) comprises a longitudinal welding step (35) flesh-flesh or flesh-leather side edges.

2 - Method according to one of claims 13 to 23 characterized in that separates each bag (1) of food from two bags (1) immediately adjacent by the first cutting line (40), which forms a cut not rectilinear, and the second cutting line (50), which forms a rectilinear cut.

25 - A facility for manufacturing sachets (1) for food intended to contain a dose of food and to be introduced into a heating fluid for cooking or heating said dose of food comprising:

means for supporting a film (30). preferably plastic, from which the bags (1) of food are made and drive means for ensuring the scrolling of the film (30),

- shaping means from the film (30) for producing a bag (1) having a shape and volume suitable for a receiving and storing ^a dose of food, - the sachets supply means ( 1) able to provide a dose of food,

- cutting means (52) of the film (30) for producing and then separating the bags (1) from the film (30), welding means (85) for closing the bags (1), said installation being characterized in that:

- The cutting means (52) comprise at least one non-rectilinear profile cutting blade for cutting the film (30) to separate two bags (1) in succession so as to allow the creation on each of the two bags (1). ) to be separated from a surface protrusion area (4) (3) so as to create a preferred grip area on each separate food bag (1).

26 - Installation according to claim 25 characterized in that the cutting means (52) comprise at least one straight cutting blade (55) mounted in synchronous association with said at least one non-rectilinear cutting blade (53).

27 - Installation according to claim 25 or 26 characterized in that its non-rectilinear cutting blade (53) has a profile in successive waves, 28 - Installation according to claim 28 or 27 characterized in that the cutting means (52) comprise a pair of reeled blades (55) and a pair of non-reeled blades (53) respectively arranged vis-à-vis to alternately perform, during the scrolling of the food bags (1), a first cutting sign (40) forming a non-rectilinear cut and a second cutting line (50) forming a straight cut,

29 - Installation according to claim 28 characterized in that the pairs of reetiligne blades (55) and not réetilignes (53) are mounted on a movable plate whose displacement is synchronized with the scroll of the plastic film (30).

30 - Installation according to one of claims 25 to 29 characterized in that said at least one non-rectilinear cutting diame (53) is embedded in the welding means (65) so as to simultaneously perform the cutting and welding of each sachet (1).