MXPA00000827A

MXPA00000827A - Bag comprising matching closing sections actuated by a slider

Info

Publication number: MXPA00000827A
Application number: MXPA/A/2000/000827A
Authority: MX
Inventors: Henri Georges Bois
Original assignee: Flexico France
Priority date: 1998-06-17
Filing date: 2000-01-24
Publication date: 2001-11-21

Abstract

The invention concerns a bag comprising two generally parallel sheets (16, 18) forming the bag main walls, matching closing sections (20, 22) respectively fixed on said sheets and a slider (50) actuating the sections (20, 22) for closing and opening. The invention is characterised in that it further comprises, parallel to the closing sections (20, 22), between said sheets (16, 18) and at the bag opening (12), additional raised relief means (100) designed to ensure tightness by forming a barrier between the sheets (16, 18), when the bag is closed, said additional raised relief means (100) being placed opposite the slider (50) flanks (52, 54) to be urged towards their sealing position by the slider (50) when the slider is moved towards the sealing position.

Description

SACHET THAT COMPRISES COMPLEMENTARY CLOSURE PROFILES BETWEEN THEY ARE ACTUATED THROUGH A CURSOR The present invention relates to the field of sachets comprising complementary closing profiles operated for their opening and for their closure respectively, by means of a slider or slide. Sachets of this type have been described, for example, in EP-A-0051010, EP-A-0102301 and EP-A-0479661. Sachets, whose opening and closing are commands through a cursor, have already rendered great services. In effect, the cursors facilitate the opening and closing of the sachets. The presence of a cursor is particularly appreciated by the elderly or those with weak eyesight. However, most known cursor-type sachets do not provide complete satisfaction. In particular, most of these sachets do not have total tightness in the closing position of the profiles. This poor tightness due to the fact that the profiles are kept separated from each other in front of the cursor. However, tightness is required in numerous applications, which include, but are not limited to, sachets used for the freezing of food products. Attempts have been made to remedy this disadvantage by proposing closure profiles that present a discontinuity located in the vicinity of the extremity that receives the cursor in the closed position of the sachet, in such a way that the cursor penetrates said discontinuity and allows a perfect coupling or intimate contact between the profiles along their entire length, in the closed position. However, the means proposed in this context turn out to be very complex. On the other hand, they do not always allow a perfect seal of the sachets. In addition, its main drawback is that they do not perfectly retain the cursor and therefore there is a danger that said cursor will be ingested accidentally by small children. Therefore, the present invention has the purpose of improving the performances of the known cursor sachets. The main object of the present invention is to propose sachets whose sealing is superior to that of the previously known sachets. Another purpose of the present invention is to propose means that reduce the possibility of unintentional removal of the cursor, in order to avoid the ingestion of the cursor by young children. And another purpose of the present invention is to propose means that allow a high rate of production in automatic mode. Said objectives are achieved within the scope of the present invention thanks to a sachet comprising two sheets generally parallel to each other forming the main walls of the sachet, closing profiles that are complementary to each other respectively fixed on said sheets and a slider for to actuate the profiles during the opening and closing, characterized in that it also comprises, parallel to the profiles, between said sheets and in correspondence with the embouchure of the sachet, additional relief means disposed on the inside of the closing profiles, designed to ensure sealing by forming a barrier between the blades, when the sachet is in its closed position, said additional means being adapted to be mechanically applied towards its sealing position by the slider when it is moved towards the position of closing of the sachet. According to certain embodiments, said additional raised means are placed opposite the flanks of the cursor. As will be seen in more detail below, said additional embossed means may be formed, for example, by at least one weatherstrip or bead that is integral with the inner surface of one of the sachet sheets, and even by two weather strips or symmetrical snares that are integral with each of the inner surfaces of both leaves, respectively, of the sachet, or it can also be elements complementary to each other male / female in solidarity with the inner surface of each of both sheets, respectively, of the sachet. In accordance with another advantageous feature of the present invention, the sachet comprises at its embouchure, means located opposite with respect to said additional sealing means, referred to the closing profiles, and adapted to define a support between the opposite internal faces of the walls of the sachet, and in the cursor, suitable means have been provided for requesting or mechanically pressing the walls of the sachet, inwards, towards an area of these walls comprised between the additional sealing means and the support means. In this way it is ensured that said additional means are forcibly carried towards a sealing position by means of the cursor. It is preferable that said mechanical stress be carried out at right angles to the closing profiles. The present invention also relates to films equipped with said sealing means and with said closing profiles, and also refers to the strips or sealing strips carrying said means. According to another advantageous characteristic of the present invention, the sachet comprises two sheets generally parallel to each other forming the main walls of the sachet, closing profiles complementary to each other fixed respectively on the sheets in correspondence to the embouchure of the sachet and a cursor comprising two lateral wings linked together in correspondence with a base or seat, placed on the outside of the leaves in correspondence to the embouchure of the sachet and defining together with a sole or elongated central template, two corridors of converging passage for the complementary closing profiles, and the sachet is characterized by the fact that the sole is interrupted in the recess of the longitudinal end of the cursor, at least on the longest side of the cursor corresponding to the divergent side of the passages, because the lateral wings are provided in the vicinity of their free edges opposite the base, with media To request or mechanically urge the sheets of the sachet making them approach each other, covering the entire longitudinal extension of the sole and extending further longitudinally from side to side thereof, in order to ensure the sealing of the sachet in the closed position of this one. Other features, objects and advantages of the present invention will come to light thanks to the reading of the following detailed description, with reference to the attached drawings, given by way of non-limiting examples, and in which: - Figure 1 represents schematically in cut, a sachet according to a first embodiment of the present invention; Figures 2 to 11 illustrate in the form of similar cuts, a first series of embodiments according to the present invention; - Figures 2 to 29 illustrate a second series of embodiments according to the present invention; - Figures 30 to 39 illustrate a third series of embodiments according to the present invention; Figures 40 to 42 represent three schematic cross-sectional views of a sachet equipped with a slider according to the present invention, according to views bearing the designations I-I, II-II and III-III in Figure 43; - figure 43 represents a view in median longitudinal section of a slider according to the present invention, according to the cutting plane bearing the designation IV-IV in figures 40 to 42, and - figure 44 represents another sectional view longitudinal, the cursor according to the cutting plane bearing the designation VV in Figure 43. Figure 1 shows a sachet 10 whose mouthpiece carries the reference number 12 and the bottom 14. The sachet 10 comprises two main sheets, 16, 18. They are linked together in correspondence of the bottom 14 (by folding, if the two sheets 16, 18, are originally integral with each other as illustrated in figures 1 to 3, or by welding or gluing, if the two leaves 16, 18, are initially separated from one another and overlapped during manufacture, as illustrated in FIGS. 4 to 9, or also by welding or gluing the edges of a single foldable sheet on itself in correspondence with the embouchure, such as illustrated for example in figures 10 and 11), as well as in correspondence to both lateral edges perpendicular to the bottom 14 and to the mouth 12 (the connection in correspondence of the lateral edges is preferably secured by welding or gluing). In correspondence with the mouth 12, both sheets 16, 18, are provided with complementary profiles of closure between themselves, 20, 22. These closing profiles complementary to each other, 20, 22, can be the subject of numerous embodiments. The invention is not limited to the precise embodiments illustrated in the appended figures. Note also that the attached figures show two embodiments of said closing profiles, 20, 22, respectively, in figures 1 to 3 and 12 and following on the one hand, and in figures 4 to 11 other part. In particular, the invention is applied to closure profiles 20, 22, of male and female type respectively, as is well known to the person skilled in the art and as schematically depicted in figures 1 to 3 and 12. And next. But the invention is not limited to this particular arrangement, and can also be applied for example to fastening profiles 20, 22, of the hooked type as illustrated in figures 4 to 11. As illustrated in figures 1, 3 to 7 and 10, the complementary closing profiles 20, 22 can in particular be applied by extrusion on the sheets 16, 18, which comprises the sachet (more precisely, on the inner surface of these sheets, 16, 18, according to the embodiments of FIGS. 1 and 3 to 7 and on the outer surface of these sheets according to the embodiment of FIG. 10, since when the sheets 16, 18 form, at the mouth of the sachet, a bellows retracted towards the interior of the sachet to form an opening veil witness). However, according to one embodiment, the closing profiles 20, 22 can be formed initially on respective support veils 21, 23, attached to the leaves 16, 18, in correspondence with the embouchure 12 of the sachet, such as illustrated in figures 2, 8, 9 and 11. Also in this case it should be noted that according to figures 2, 8 and 9, the support leaflets 21, 23, are fixed on the inner surface of the sheets 16 18. Instead, according to FIG. 11, the sheets 16, 18, which form, at the mouth of the sachet, a bellows folded inwardly so as to form an opening veil, the support veils, , 23, are fixed on the outer surface of the sheets 16, 18. The connection between the sheets 21, 23, and the films 16, 18, can be effected by any suitable conventional means, for example by hot welding or gluing. The use of closing profiles not applied by extrusion on the films 16, 18, but attached by welding or gluing, has been illustrated only in figures 2, 8, 9 and 11 of the attached drawings. However, the use of said closing profiles, 20, 22, attached to the films 16, 18, may be applied to all the embodiments according to the invention. As indicated above within the scope of the present invention, the sachet further comprises, on the one hand, a slider 50 adapted to actuate the profiles 20, 33, on the occasion of the closure and the opening, and on the other hand, parallel to the closing profiles, 20, 22, between said sheet 16, 18 and in correspondence with the embouchure 12 of the sachet, additional relief means 100 designed to ensure the sealing by forming a containment or barrier between the sheets 16, 18, in the closing position of the sachet, said additional relief means, 100, positioned opposite the flanks 52, 54, of the slider 50 so as to be urged or urged towards its sealing position by the slider 50 when the it is displaced towards the sealing position. The cursor 50 can be object of numerous classical embodiments. In particular, the cursor may be in accordance with the arrangements described in EP-A-0479661. For this reason, the cursor 50 will not be described in greater detail in what follows. However, it should be noted that it is preferable that the cursor 50, made of plastic material, comprises two lateral wings 52, 54 (or "flanks") joined together in correspondence with a base or seat 56 and defining together with a central sole elongated (not shown in the accompanying figures corresponding to the location of the illustrated cutting plane) two converging passageways for the complementary snap-together profiles 20, 22. Therefore, when the direction of relative movement of the slider 50 with respect to the closing profiles 20, 22 tends to displace the cursor 50 forcing the closing profiles 20, 22 to be coupled together, the sachet is closed. When the cursor 50 is moved in the reverse direction, the sachet opens. The films 16, 18, the closure profiles 20, 22, and the additional sealing means 100, can be made of any suitable plastic material known to the person skilled in the art. It is preferable that it is polyolefin, and it is more advantageous that the material is low or high density polyethylene, and even polypropylene. It is preferable, within the scope of the present invention, that the means 100 be disposed inside the closing profiles 20, 22 (that is, towards the inside of the sachets with respect to these closing profiles 20, 22) and that extend over the entire length of the sachets (that is, they have the same length as the closing profiles 20, 22). According to the first embodiment illustrated in FIG. 1, said additional sealing means 100 are formed by a bead or bead 102 that is parallel to the profile 20 and integral with any one of the leaves 16. According to the figure 1, this weatherstrip 102 is applied by extrusion on the film 16. However, and to the title of variant, as previously mentioned, the seal 102 could be applied by extrusion on a support web attached to this film 16. A weatherstrip this type, 102, has been placed opposite the flanks 52, 54, of the slider 50 and on the inside thereof. Thus, the protrusion 102 is urged or urged so as to lean against the opposite film 8 when the slider 50 is moved towards the closing position. It is preferable that the geometry of the profiles 20, 22, of the means 100 and of the slider 50, be such that the flanks 52, 54, of the slider 50 impose on the means 100, a transverse set (i.e., perpendicularly with respect to the blades 16, 18) lower than tolerated for the closing profiles 20, 22. For this purpose, for example when the inner surfaces of the flanks are parallel to each other as illustrated in the attached figures, the thickness L1 of the means 100 is greater than the thickness L2 defined by the closing profiles 20, 22, when they are coupled together. This preferred embodiment L1 > L2 is not limited to the embodiment of Figure 1, but is applied to all the embodiments of the present invention, even when said sealing means 100 are formed by two weather strips, or also by complementary means to each other male / female or by any other equivalent means, as will be described in the following. In fact, this arrangement makes it possible to ensure that the means 100 ensure a containment or a tight barrier between both films 16 and 18. According to the embodiment illustrated in figure 2, the sealing means 100 are formed by weather strips or bunds 104, 106, which are integral with both films 16 and 18 respectively and which are positioned opposite so as to contact their crests so as to form a watertight barrier, when requested or urged by the flanks 52, 54 of the cursor 50 According to Figure 2, the two weather strips 104, 106 are symmetrical with each other. However, and as a variant, it is possible to provide weather strips 104, 106, asymmetrical with each other. According to the embodiment illustrated in FIG. 3, the sealing means 100 are formed by complementary elements 110, 112, male / female respectively integral with the inner surface of both sheets 16, 18, of the sachet. More precisely, according to FIG. 3, the female element 112 is formed by two lips 1120 and 1122 adapted so as to respectively support the flanks of the male element 110. According to FIG. 3, the two lips 1120, 1122 , they are symmetrical. However, and as a variant, it is possible to provide that both lips 1120, 1122 are asymmetrical with each other. On the other hand, the male element 110 has a global rounding. The sealing means 100 illustrated in FIG. 4 are identical to those in FIG. 3. However, it should be noted that according to FIG. 4, the slider 50 has protuberances on the inner surface of its flanks 52, 54. 520, 540, placed in front of the means 100, in order to ensure the solicitation of the latter towards the sealing position, on the occasion of the closing of the sachet. The geometry of said protuberances 520, 540 can be object of numerous variants. As a variant it is possible to provide said protuberances on the outer surface of the walls 16, 18, in front of the cursor, or also said protuberances on the walls of the sachet and other protuberances in front of the cursor 50. In figure 5 another embodiment is shown according to which the male element 110 has a substantially triangular section. Thanks to this structure, it is ensured that the contact between the flanks of the male element 110 and the lips 1120 and 1122 is reinforced when the male and female elements 110 and 112 are urged or pressed so as to approach each other by the cursor 50. Note on the other hand that according to figure 5, both lips 1120 and 1122 of the female element 112 are asymmetrical with each other. It is preferable that the lip 1120 located towards the inside of the sachet with respect to the male element 110, is longer and more flexible than the second lip 1122 located towards the outside of the sachet. In this way, the internal pressure of the sachet, and even eventually directly the content of the sachet, such as a liquid content, solicits or presses the first lip 1120 elastically against the male element 1210. On the other hand, the second lip 1122 resists an effort of this type and therefore does not separate from the male element 110. As illustrated in figures 1 to 6 and 10, the means 100 can be applied by extrusion on the sheets 16, 18, which make up the sachet (more precisely , on the inner surface of these sheets 16, 18, according to the embodiments of figures 1 to 6 and on the outer surface of said sheets according to the embodiment of figure 10 when the sheets 16, 18 , form, at the sachet embouchure, a bellows folded towards the interior of the sachet so as to form a veil witness of the opening, however, according to one embodiment, the means 100 may be formed initially of the respective support veils 121, 123 attached to the sheets 16, 18, in correspondence with the opening 12 of the sachet, as illustrated in figures 7 to 9 and 11. Also in this case it should be noted that in accordance with 7 to 9 the support leaflets 121, 123 are fixed on the inner surface of the sheets 16, 18. In contrast, according to figure 11, when forming the sheets 16, 18, at the mouth of the sachet, a bellows folded towards the interior of the sachet in order to form a veil witness of the opening, the support veils 121, 123 are fixed on the outer surface of the sheets 16, 18. Note also that, as illustrated in figures 8 , 9 and 11, the support webs 121 and 123 can be confused with the support webs 21 and 23, respectively, of the closure profiles 20, 22. The connection between the webs 121, 123 and the films 16, 18 can be effected by any suitable means, for example by hot welding or gluing. The use of means 100 not applied by extrusion on the films 16, 18, but attached by welding or gluing, has been illustrated only in figures 7 to 9 and 11 of the attached drawings. However, the use of said attached means 100 on the films 16, 18 may be applied to all the variants of embodiment according to the invention. In the attached figure 6 there is illustrated an embodiment according to which on the one hand notches or notches 160,180 leading to the inner surface of the sachet are provided, in front of the means 100 respectively, in this case in front of respectively the female element 112 and the male element 110, and on the other hand ribs 522 and 542 protruding on the inner surface of the flanks 52 and 54 of the slider 50, which ribs 522 and 542 are adapted to penetrate respectively said recesses 160 and 180. The cooperation, thus defined, between the notches 160, 180 and the ribs 522 and 542, makes it possible to improve the solicitation of the means 100 by the slider 50. In effect, it allows to locate with precision the zone of solicitation due to the cursor 50. It also allows to retain safely the 50 cursor on the sachet. In fact, this cooperation prevents any unintentional removal of the slider 50. The use of the ribs 522 and 542 and of complementary notches 160, 180, has been represented only in figure 6 of the attached drawings. However, the use of said ribs 522 and 542 and of the complementary notches 160, 180 can be applied to all the variants of embodiment according to the invention. The embodiment of figure 7 has been described in the foregoing. It differs essentially from the embodiments illustrated in the previous figures, in that the means 100 are carried by the respective support veils 121, 123, attached to the sheets 16 and 18, as previously described. The embodiment of figure 8 has been described in the foregoing. It differs essentially from the embodiments illustrated in the previous figures, by the fact that the means 100 are carried by the respective support veils 121, 123, confused with the support veils 21 and 23 of the profiles 20, 22 and attached to the sheets 16 and 18, as previously described. The same applies to the embodiment illustrated in FIG. 9. However, and additionally according to FIG. 9, the support leaflets 121, 21 and 123, 23 are connected to each other by a loop 24. It is arranged in the inside of the means 100 and has its concavity directed towards the outside of the sachet. Thus, these support veils 121, 21, 123, 23 and 24, form an antiviolation veil or witness of the opening in correspondence with the embouchure 12. Indeed, it is convenient to break this veil 24 before accessing the interior of the sachet. This antiviolation veil 24 is formed by a bellows folded towards the inside of the sachet, in correspondence with the mouth 12, in the continuity of the support veils 121, 21 and 123, 23. Figures 10 and 11 have been used variants of embodiment according to which the antiviolation veil or witness of the opening, of this type, bearing the reference number 19, is formed by a fold in the film making up the main sheets 16 and 18 of the sachet. According to figure 10, the profiles 20, 22, and the support means 100 are applied by molding on this film. Instead, according to Figure 11, the profiles 20, 22 and the means 100 are carried by the support means 121, 21 and 123, 23, leaned on the film. A bellows 19 of this type, directed towards the inside of the sachet, can be formed by any known means, for example by means of a sheet that presses the bellows 19 inwards between the sheets 16, 18, as is well known by the person with expertise in art. The person skilled in the art will easily understand that in a conventional manner, it is convenient to break the antiviolation veil 24 or 19 to access the product contained in the sachet 10. Thus, the state of the veil 24 or 19 allows indicating whether the sachet has been the object or not of a manipulation. In order to facilitate the opening of the veil 24 or 19, it can be provided, in a manner known per se, with a line of weakening or pre-cutting, for example of half a width, as illustrated schematically by the number reference 190 in figures 10 and 11. The sachets obtained within the scope of the present invention offer numerous advantages over known prior sachets. In particular, they allow a high rate of production, in addition to a good tightness of the sachets. On the other hand, the cooperation defined between the notches 160, 180 and the ribs 522, 542 of the cursors 50, allows to avoid any untimely removal of the cursors 50 under the effect of the internal pressure of the sachets or also under the effect of a solicitation by a user. Where appropriate, within the scope of the embodiments illustrated in FIGS. 10 and 11 for which an antivioral veil 19 is provided, formed by a fold of the film making up the sachets, it is possible to provide a weld between the surfaces interiors of the main sheets 16, 18, which make up the sachet and the sections 162, 182 that form the bellows corresponding to the anti-intrusion veil 19, as has been schematized with the reference number 60 in figures 10 and 11. Of course, the invention is not limited to the particular embodiments that we have just described, but extends to all the variants conforming to its spirit. The sachets according to the present invention can be realized in all types of known and suitable machines, especially in machines of the FFS type (Form, Fill and Seal), that is to say in machines designed to carry out automatic operations of formation, filling and closing of the sachets. On the other hand, the present invention applies to both Implementations according to which the closure profiles are arranged longitudinally with respect to the direction of film advancement as well as implementations according to which the closure profiles are arranged transversely. On the other hand, the present invention applies both to implementations according to which the closure profiles are pre-equipped with the slider when they are advanced in the sachet forming machine, as well as to implementations according to which the slider is arranged subsequently on the profiles. Note, on the other hand, that the present invention is not limited to the geometry of the notches 160, 180 and of the ribs 522, 542, illustrated in the enclosed figure 6. In fact, these recesses 160, 180 and ribs 522, 542 can be subject to numerous variants in terms of their cross section. For example, it is possible to face conferring to the notches 522, 542 a cross section of converging edges, for example in a rounded tail or in the form of a rail (for example in T or others). An arrangement of this type reinforces the maintenance of the cursor 50 on the sachets. As indicated in the foregoing, within the scope of the present invention, it is preferable that the sealing means 100, as well as the closing profiles 20, 22, extend over the entire width of the sachet. By contrast, by definition, the cursor 50 extends only in a limited area of this width. Therefore, the cursor 50 alone is able to request or press the sealing means, 100, permanently along its entire length. As indicated above, to ensure tightness, it is possible to impart to the medium 100 a thickness L1 greater than the thickness L2 of the closing profiles 20, 22. Other means for inducing a transverse pressure P with respect to the walls 16, 18, in the means 100, the sachet being in its closed position, in order to ensure a good seal. This pressure P has been schematized in figures 2 and 3. However, also in this case these provisions can be applied to all the embodiments according to the present invention. Thus, within the scope of the present invention, according to a variant, the closure profiles 20, 22 are adapted to automatically ensure a P-loading of this type of the means 100 when the sachet is closed. For this purpose, different geometries can be adopted for the closing profiles 20, 22. In the case of complementary profiles of male / female type as illustrated in FIG. 2, it is possible to provide, for example, an asymmetrical female profile, especially so that L3 is less than L4, ie the physical height or volume L3 of the element 20 defining the inner lip of the female profile 22 is lower than the physical height or volume L4 of the element 222 that defines the outer lip of the profile 22. The person skilled in the art will understand that thanks to this arrangement, the inner element 220 of the female profile 22 induces a tension (contrainte) on the sealing means 100 with the sachet closed, that is to say when the male element 20 is has been coupled with the female element 22, this over the entire length of the means 100. A similar effect can be obtained with an asymmetrical male profile 20 (possibly combined with a profile). The female 22 also asymmetric, as previously mentioned). In the case of the complementary hook-type closing profiles, as illustrated in FIG. 5, it is possible to provide for example that both complementary hooks C1, C2, located towards the interior of the sachet, define in assembled position a width L5 between the inner faces of the sheets 16, 18, less than the width L6 spanning between the same faces of the sheets 16, 18, in correspondence with the pair of complementary hooks C3, C4 located towards the outside of the sachet. This arrangement makes it possible to ensure the same tension over the entire length of the means 100. In FIG. 12, an embodiment variant according to which both elements are illustrated is illustrated.106, integral with the inner surface of the sheets 16, 18, respectively, are positioned so as to be able to rest on their crest, as previously described with respect to Figure 2, but are positioned so as to be juxtaposed and supported in correspondence with each other. their flanks adjacent to 103, 105, generally perpendicular to the blades 16 and 18. Note that it is preferable, according to the embodiments illustrated in Figures 12 and following, that the slider 50 be provided at the ends of its wings laterals 52, 54 with respective returns 53, 55 directed towards the inside of the sachet. These returns 53, 55 are positioned so as to be located beyond the sealing means 100. On the one hand, these returns 53, 55 participate in the sealing of the sachet. On the other hand, these returns 53, 55 intervene in the maintenance of the cursor 50 on the sachets in order to prevent an untimely removal of the cursor. As can be seen in figure 12, these returns 53, 55 request or press the sheets 16, 18 causing them to come closer to each other, beyond the sealing means 100. Note also that according to the embodiments illustrated in FIGS. 12 and following figures, it is preferable that the portions of supporting film 16, 18, located opposite the closing profiles 20, 22 and the sealing means 100, have a thickness greater than the thickness of the rest of the film making up the sachet. This over-thickening of the support films 16, 18, normally to the slider 50, allows the means 100 to be maintained in its sealing position when the sachet is in its closed position. A localized over-thickness of this type, of the films 16, 18, can be obtained in the form of an over-thickness formed by extrusion or it can also be the result of the fixing of the support sheets of the closing profiles, 20, 22, or means 100, as previously mentioned. Figure 13 shows another variant embodiment according to which both elements 104, 106, integral with the inner surface of the sheets 16, 18 respectively, are provided on their crest with a respective wing 1040, 1060, orthogonal with respect to said elements. In this way, said wings 1040, 1060 extend globally parallel to the leaves 16, 18. The elements 104, 106 are supported on their crest by means of these wings 1040, 1060.

According to the embodiment of Figure 13, said wings 1040, 1060, are directed towards the interior of the sachet. As a variant, it is possible to foresee that the wings 1040, 1060 are instead directed towards the outside of the sachet. According to yet another variant, it is possible to provide the wings of this type, 1040, 1060, on the crest of the elements 104, 106, both inwardly and outwardly of the sachet. In this case the elements 104, 106 provided with the wings 1040, 1060, have the general shape of a T. In figure 14, an embodiment variant of figure 12 is shown according to which at least of both juxtaposed elements 104, 106 is provided on its ridge with an orthogonal wing 1060. It is intended to come to rest against the inner face of the opposite blade 16, to achieve sealing. According to FIG. 14, a wing of this type, 1060, has been shown on only one of the elements 106. As a variant, it is however possible to provide an additional wing of this type designed to come to rest against the inner face of the opposite sheet, on the crest of both elements 104, 106. Figure 15 shows another variant embodiment of figure 12 according to which the two juxtaposed elements 104, 106, are provided on their crest with an excrescence rounds 1042 , 1062. The purpose of the same is to come to rest against the inner face of the opposite blade 16, 18, in order to achieve sealing. According to FIG. 15, an outgrowth of this type is provided in both elements 104, 106. As a variant it is possible to provide an excrescence of this type 1042, 1062 in a single element 104, 106. According to FIG. The excrescences have a circular cross-section, and are symmetrical with respect to the median plane of the elements 104, 106. However, the invention is not limited to this particular geometry. Figure 16 illustrates a variant embodiment of Figure 13 according to which the cursor 50 is also provided in correspondence with the ends of each of the returns 53, 55, with an additional wing 530, 550, oriented towards the base or seat 56 of the cursor 50, that is, towards the outside of the sachet. These wings 530, 550 are thus oriented generally parallel to the lateral wings 52, 54 of the slider 50. These additional wings 530, 550 are designed to take position in the volume defined between the sheets 16, 18 and 1040 , 1060, of the sealing means 100. If one observes Figure 16, it is understood that these wings 530, 550, ensure an undulation on the sheets 16, 18, suitable to further strengthen the sealing of the obtained sachets. According to the embodiments described above, the cursor 50 has a symmetry with respect to a longitudinal plane. Thus, according to figures 12 and 14, each of the flanks 52, 54 is provided with a return 53, 55. In contrast, according to the variant illustrated in figure 17, the cursor presents an asymmetry in the sense that not only one, 52, of the flanks is provided with a return 53 of this type oriented towards the interior of the sachet.

FIG. 18 shows an embodiment of FIG. 17 according to which this return 53 is provided on its inner surface with a protuberance 532 facing the base 56 for requesting or pressing the two juxtaposed elements 104, 106 so that support, through its adjacent flanks, 103, 105. To this end, the protrusion 532 exerts on the element 104, a pressure or pressure oriented towards the base 56. Figure 19 shows another variant embodiment according to which the portions of support films 16, 18, which carry the closing profiles 20, 22, and the sealing means 100, are not located in the direct extension of the sheets that make up the body of the sachet, but are displaced towards the outside of the sachet in correspondence to the respective recesses or recesses 1600, 1800. These recesses 1600, 1800, can be obtained by extrusion on the occasion of the manufacture of the film, or can be obtained subsequently by folding the film. If Figure 19 is observed, it is observed that said recesses 1600, 1800, facilitate the juxtaposition of the sheets 16, 18 at the exit of the cursor 50, although the sheets 16, 18, are necessarily separated from each other, in the interior of the cursor, due to the presence of the closing profiles 20, 22, and of the means 100. Figure 12 shows an embodiment according to which both elements 104, 106 integral with the surface respectively interior of the sheets 16, 18, are not positioned so as to be able to rest on their crest, as previously described with respect to Figure 2, but are positioned so as to juxtapose and support each other in correspondence of their adjacent flanks in front of each other. 103, 105, globally perpendicular to the blades 16 and 18. Note that it is preferable, according to the embodiments illustrated in figure 12 and following, that the slider 50 be provided at the ends of its wings with the Tears 52, 54, with respective returns 53, 55 directed towards the interior of the sachet. These returns 53, 55 are positioned so as to be located beyond the sealing means 100. On the one hand, these returns 53, 55 participate in the sealing of the sachet. On the other hand, these returns 53, 55 intervene in the maintenance of the cursor 50 on the sachets in order to prevent an untimely removal of the cursor. As can be seen in figure 12, these returns 53, 55 request or press the sheets 16, 18 causing them to come closer to each other, beyond the sealing means 100. Note also that according to the embodiments illustrated in FIGS. 12 and following figures, it is preferable that the portions of supporting films 16, 18, located opposite the closing profiles 20, 22 and the sealing means 100, have a thickness greater than the thickness of the rest of the film making up the sachet. This over-thickening of the support films 16, 18, normally to the slider 50, allows the means 100 to be maintained in its sealing position when the sachet is in its closed position. A localized thickening of this type, of the films 16, 18, can be obtained in the form of an over-thickening formed by extrusion or it can also be the result of the fixing of the support sheets of the closing profiles, 20, 22, or means 100, as previously mentioned. FIG. 13 shows another variant embodiment according to which both elements 104, 106, integral with the inner surface of the sheets 16, 18 respectively, are provided on their crest with a respective wing 1040, 1060, orthogonal with respect to to said elements. In this way, said wings 1040, 1060 extend globally parallel to the leaves 16, 18. The elements 104, 106 are supported on their crest by means of these wings 1040, 1060. According to the embodiment of the 13, said wings 1040, 1060 are directed towards the inside of the sachet. As a variant, it is possible to foresee that the wings 1040, 1060 are instead directed towards the outside of the sachet. According to another variant, it is possible to provide the wings of this type, 1040, 10602, on the crest of the elements 104, 106, both inwardly and outwardly of the sachet. In this case, the elements 104, 106 provided with the wings 1040, 1060, have the general form of a T. In figure 14, an embodiment variant of figure 12 according to which at least one of both is shown is illustrated. juxtaposed elements 104, 106 is provided on its crest with an orthogonal wing 1060. It is intended to come to rest against the inner face of the opposite blade 16, to achieve sealing. According to figure 14, a wing of this type, 1060, has been represented in only one of the elements 106. As a variant, it is however possible to provide an additional wing of this type designed to come to rest against the inner face of the opposite sheet, on the crest of both elements 104, 106. Another embodiment of the figure is illustrated in FIG. 12 according to which the two juxtaposed elements 104, 106, are provided on their crest with a rounded excrescence 1042, 1062. It aims to come to rest against the inner face of the blade 16, 18, opposite, to achieve tightness . According to figure 15, an outgrowth of this type is provided in both elements 104, 106. As a variant, it is possible to provide an outgrowth of this type 1042, 1062 in a single element 104, 106. According to figure 15, these excrescences have a circular cross-section, and are symmetrical with respect to the median plane of the elements 104, 106. However, the invention is not limited to this particular geometry. Figure 16 illustrates a variant embodiment of Figure 13 according to which the cursor 50 is also provided in correspondence with the ends of each of the returns 53, 55, with an additional wing 530, 550, oriented towards the base or seat 56 of the cursor 50, that is, towards the outside of the sachet. These wings 530, 550 are thus oriented generally parallel to the lateral wings 52, 54 of the slider 50. These additional wings 530, 550 are designed to take position in the volume defined between the sheets 16, 18 and 1040 , 1060, of the sealing means 100. If one observes Figure 16 it is understood that these wings 530, 550, ensure a ripple on the sheets 16, 18, suitable to further strengthen the tightness of the obtained sachets. According to the embodiments described above, the cursor 50 has a symmetry with respect to a longitudinal plane. Thus, according to figures 12 to 14, each of the flanks 52, 54, is provided with a return 53, 55. Instead according to the variant illustrated in figure 17, the cursor has a symmetry in the direction that only one, 52, of the flanks is provided with a return 53 of this type oriented towards the inside of the sachet. FIG. 18 shows an embodiment of FIG. 17 according to which this return 53 is provided on its inner surface with a protuberance 532 facing the base 56 for requesting or pressing the two juxtaposed elements 104, 106 so that support, through its adjacent flanks, 103, 105. To such affect, the protrusion 532 exerts on the element 104, a pressure or pressure oriented towards the base 56. Figure 19 shows another variant embodiment according to which the portions of support films 16, 18, which carry the closing profiles 20, 22 and the sealing means 100, are not located in the direct extension of the sheets comprising the body of the sachet, but are displaced towards the outside of Sachet in correspondence to the respective shelves or recesses 1600, 1800. These recesses 1600, 1800, can be obtained by extrusion in the manufacture of the film, or can be obtained eriormente by folding the film. If Figure 19 is observed, it is observed that said recesses 1600, 1800, facilitate the juxtaposition of the sheets 16, 18 at the exit of the cursor 50, although the sheets 16, 18, are necessarily separated from each other, in the interior of the cursor, this, due to the presence of the closing profiles 20, 22, and of the means 100. Note also during the examination of Figure 19, that if necessary any one of the entrances 1800 can in turn to be provided with an extension 102 facing the opposite support sheet 16. This extension 1802 has been designed to come to rest against the opposite entrance 1600 in order to further strengthen the sealing of the obtained sachets. In FIG. 20, an embodiment variant according to which a protuberance 530 or return to the interior of the slider on the single return 53 and on the other hand an element 106 projecting on the sheet 18 is provided. as can be seen in figure 20, the protrusion 530 imposes a curvature or labyrinth path to the second blade 16, at the exit of the cursor 50, also in this case suitable to reinforce the sealing of the obtained sachet. FIG. 21 shows a variant embodiment of FIG. 12 according to which at least one of both elements 104 or 106 has an increasing thickness in the direction of its ridge or a flank inclined in such a way that it exerts a force on the other element 106 or 104 juxtaposed, the sachet being in the closed position. In figure 22 and following embodiments are shown according to which the sealing means 100 are essentially formed by flexible and elastic structures, so as to be deformable on the occasion of the closure of the sachet, while according to the representations given in Figures 12 to 21, means 100 are essentially rigid. Also shown in FIG. 22 is a variant embodiment according to which the sealing means 100 comprise a curved, flexible and elastic lip, 130 integral with the sheet 18 carrying the female closing profile 22. As a variant, a lip flexible and elastic of this type, 130, could be integral with the blade 16 carrying the male closure profile 20. According to figure 22, the lip 130 is formed by a cylinder sector whose central angle is greater than 180 degrees. According to figure 22, the concavity of the lip 130 is oriented towards the inside of the sachet. However, as a variant it could be foreseen that the concavity of the lip 130 is directed towards the exterior of the sachet. As can be seen in figure 22, when the sachet is in the closed position, the crest of the lip 130 comes to rest against the opposite support sheet 16. For this purpose, and as can be seen in figure 23, the sachet is open state, said lip 130 extends beyond the associated closure profile, 22. Thanks to this arrangement it can be ensured that when the sachet is in the closed state, said lip 130 exerts a pressure on the opposite sheet, 16. In figure 24 an embodiment variant of figure 22 according to which the location of the lip 130 and the geometry of this lip 130 are such that said lip 130, when it rests on the opposite sheet 16, receives a reaction that presses it once is illustrated. so that it rests against one of the closing profiles, in this case the female closing profile 22. In FIG. 25, another reaction variant according to which such an engagement of the lip 130 supported with The female closure element 22 is reinforced by the presence on the inner surface of the flanks 52, 54, of the protrusion slider 50, 540. In this case, according to the representation given in FIG. 25, these protuberances 520, 540 they are not limited to this geometry, and can be the subject of numerous variants of realization. Note that in figure 25 the central sole of the cursor 50 controlling the coupling, respectively the separation of the closing profiles 20,22, bears the reference numeral 57. In figure 26 a side view of a fitted sachet is illustrated. in this way. In said figure 26 it is possible to distinguish a cursor 50 having this type of protuberances 520, 540, as well as the closing profiles 20, 22 and the sealing means 100. If one observes Figure 26, it will be observed that it is preferable that the protuberances 520, 540, extend only a part of the length of the slider 50 and converge on the other side towards the upper base 56 of the slider 50 whereby the end of the slider 50 located on the side of the sachet opening approaches. Thanks to this arrangement, the protuberances 520, 540 press the lip 130 towards a support against the closing profile 22, in the vicinity of the opening area of the sachet. Similarly, the returns 53, 55, provided on the wings 52, 54, of the slider 50 may converge towards the base 56 whereby the end of the slider 50 located on the side of the sachet opening approaches., in order to improve the sealing of the sachet in said place. In FIG. 27, another variant embodiment is shown according to which each of the two blades, 16, 18, is provided on its inner surface with an elastic lip 130 in the form of a cylinder sector. These two lips 130 are therefore in abutment on their crest when the sachet is closed. Also for this, in rest condition, that is, in the open position, at least one of both lips 130 preferably extends beyond the associated closure profile, as schematized in FIG. 28. The slider 50 used within the scope of the variant embodiment of FIG. 27 can also include ascending probing bulges 520, 540, as shown in FIG. 26, in order to press said elastic lips 130 against the closing profiles 20, 22, towards the closing position of the sachet. In figure 29 another embodiment variant according to which each of the supporting films 16, 18, is provided with an elastic lip 130, however, they are positioned not to get to rest on their crest, but on way of juxtaposing laterally, as can be seen in figure 29. To do this both lips 130 formed, each of them by a sector of cylinder that has a central angle greater than 180 degrees, have a concavity directed respectively towards the inside and towards the outside of the sachet. The variants of embodiment illustrated in the attached figures 30 and 39 are described below. As indicated above, according to these variants, the sachet comprises at its mouth 12, means 150 located opposite said additional sealing means 100, with respect to the closing profiles 20, 22, and these means 150 are adapted to define a support between the internal faces of the walls of the sachet. In addition, means 50 are provided on the slider 50 for being able to request the sachet-like faces, towards the interior, towards an area of these walls comprised between the additional sealing means 100 and the support means 150. In this way it is ensured that said additional means 100 are requested towards a sealing position, by the slider 50. It is preferable that this solicitation is normally made with respect to the closing profiles 20 and 22. In this way, and preferably as can be seen in the attached figures , the additional sealing means 100 are located inside the closing profiles 20, 22, while the means 150 defining the support are located on the outside of the closing profiles , 22. This arrangement comprising means 150 to means for soliciting the sealing means by the slider 50 can be applied to all the variants of embodiment described above. Therefore, it is not limited to the embodiments of FIGS. 30 to 39. In particular, this arrangement applies to all types of sealing means 100, to all types of closing profiles 20, 22 and to all the cursor variants 50 or sachet equipped with an anti-rape veil, etc. In figure 30 a variant is illustrated according to which the additional sealing means 100 are formed by two flexible and elastic lips 170, 172 symmetrical and integral, with the internal face of the walls 16 and 18, respectively, and oriented towards the inside and the bottom of the sachet. As a variant, these lips 170, 172 can be oriented towards the interior of the slider 50 (especially for example for vacuum sachets). As indicated above, the arrangement with the support means 150 can be applied to all types of sealing means 100, and is not limited to the means 100 of FIG. 30. In particular, it can be applied to lips 170, 172, not symmetrical with each other.

Similarly in accordance with Figure 30, the closure profiles, 20, 22, are of the male / female type. However, the invention can be applied to all types of closing profiles, especially hook profiles. According to figure 30, the support means 150 are formed by two symmetrical elements 152, 154, integral respectively with the internal faces of the walls 16, 18, in correspondence with the embouchure of the sachet. Still more precisely, according to FIG. 30, each of the elements 152, 154 has a rectangular cross section and extends in the direction of the median plane of the sachet in correspondence with which these elements are in reciprocal support, the sachet being in its closed position. Thus, these elements 152 and 154 extend globally in a direction perpendicular to this median plane. Note that according to FIG. 30, the means 100, the profiles 20, 22 and the means 150 consist of one or more materials preferably applied by extrusion, together with the walls 16, 18. With more precision, note that these sections of these walls between the sealing means 100 and the support means 150 are thicker than the sheets 16, 18, which make up the rest and the essentials of the sachets. Thus, the aforementioned sections have a certain rigidity between the means 100 and the means 150. The person skilled in the art will understand that thanks to the aforementioned characteristics, when the elements 152, 154 come to rest and the cursor 50 exerts a The above-mentioned sections of the walls 16, 18 placed between the means 100 and 150 are solicited, the sealing means 100 being pressed in turn towards their contact and maximum sealing position. In FIG. 31, the stressing means provided on the slider 50, in the form of protuberances 520, 540, provided on the inner surface of the wings 52, 54, normally located with respect to the closing profiles 20, 22, are shown. In this case, these are protuberances formed by cylindrical lugs, but the invention is not limited to this particular geometry. In FIG. 31, the force exerted by the cursor 50 on the embouchure sections of the walls of the sachet, F2, has been indicated with the reference number F1; in this case, the reaction due to the means 150 and F3 the effort exerted on the sealing means 100. On the other hand, it can be seen that according to figure 31 the sections mentioned above define, in correspondence to the embouchure of the sachet, a a cage whose cross section is rectangular and protruding with respect to the main walls 16 and 18 of the sachet. In other words, the main walls of the sachet are not coplanar with the external surfaces of these sections, but are located withdrawn towards the interior, with respect to them, in a "d" value. In this way, a recess serving to support the returns 53 and 55 provided on the wings 52 and 54 of the slider 50 is defined in the walls 16 and 18 of the sachet, in order to avoid an unexpected removal thereof.

In Figure 32, a variant according to which a recess of this type is suppressed is illustrated. Thus, according to FIG. 32, however, the main walls of the sachet are coplanar, in a condition of rest, with the external surfaces of the sections located between the means 100 and 150. However, a variant of this type can also be used. cooperate with a cursor 50 equipped with returns 53, 55, on its wings 52, 54, thanks to the authorized deformation, of the leaves, 16, 18. According to the variant illustrated in figure 33, the aforementioned sections, between the means 100 and 150, define in correspondence the embouchure of the sachet, not a cage of rectangular cross section, but a cage globally rounded. According to figures 30 to 33 described above, the support elements 152, 154 are symmetrical and are contacted in the median plane of the sachet. However, as a variant, these elements 152, 154 can be asymmetrical and thus contact outside the median plane. In this way, a variant according to which only the wall 18 is provided with a support element 154 protruding from its internal face is illustrated in FIG. 34. Said element 154 is adapted to come to rest against the internal face of the opposite wall 16. According to the aforementioned figures 30 to 34, the sealing means 100, the closing profiles 20, 22 and the support means 150 are As a variant, these different means can be applied on respective attached support webs, for example thermally welded or glued, on the internal faces of the sheets 16, 18. These can be respective and separate support webs for each of the means 100, profiles 20, 22 and means 150, or they can also be support webs common to several of these means. Thus, for example, in FIG. 35, an embodiment variant according to which the means 100, the closing profiles, 20, 22, and the support means, 150, are carried by two respective veils attached one against the other, are illustrated. internal face of the sheet 16, and the other side is attached on the inner side of the sheet 18. In figure 36 there is illustrated an embodiment according to which the means of solicitation are formed not by protuberances integral with the internal face of the wings of the cursor, but by protrusions 15 protruding from the external face of the wall sections located between the means 100 and 150, preferably at a right angle with respect to the closing profiles 20, 22. According to another embodiment more, it is in this way possible to provide protrusions simultaneously in the cursor and in the walls of the sachet. In figure 37 another embodiment variant according to which the limbs located opposite the elements 152 and 154 forming support means are widened, so as to ensure a support thereof and prevent these elements, by offset or displacement, are located adjacent to each other, in this case which would not be obtained the lever arm provided to exert the stress on the means 100. According to Figure 37, the adjacent ends of the elements 152 and 154, have a generally triangular cross section whose base is located in the contact plane. However, the invention is not limited to this particular arrangement. Figure 38 illustrates a variant according to which the slider 50 is provided on the inner side of its wings 52, 54, with protruding structures 522, 524 of complementary cross section to each other, there being grooves formed in the protuberances 15 previously mentioned, and structures 522, 542 are coupled in these grooves 13. More precisely, structures 522, 542 are opened in a horn or bell, while grooves 13 have converging edges. Thanks to this provision, an unforeseen removal of the cursor 50 is avoided. In figure 39 another embodiment variant is illustrated according to which elements of complementary shapes are defined between the cursor 50 and the sachet walls, in correspondence to the returns 53, 55, formed on wings 52, 54 in the form of elements 530, 550, as previously described. If necessary, the elements that make up the sealing means, 100, can be co-extruded together with the sachet and / or the closing profiles, with a material that is more flexible than the material forming the latter. For example, it is possible to provide co-extrusion of the lips 170, 172, using an ethylene copolymer or a synthetic elastomer.

As mentioned in the foregoing, the present invention is not limited to the particular embodiments just described, but applies to all variants according to its spirit. Within the scope of the present invention, the term "sealing" refers to the fact that the means 100 are adapted (depending on their geometry and / or support force) either to ensure a containment or complete barrier that prevents any penetration from the outside to the inside of the sachet and any leakage from the inside to the outside of the sachet, either to ensure at least one containment or barrier in one direction, that is to prevent penetration from the outside into the sachet, or prevent a leak from the inside to the outside of the sachet. Note also that the return means, 53, 55, and structures such as 522 and 542, provided in sachets and involved in the maintenance of the cursor 50 in the sachet, are not usually the only ones that ensure this maintenance , but for example complement the function of a flared or flared means provided in the central sole of the cursor 50. The person skilled in the art will understand, on the other hand, that within the scope of the embodiments illustrated in figures 30 to 39, the sealing means 100 may not be placed opposite the flanks 52, 54, of the cursor, but on the outside thereof. In other words, in this case, the end of the cursor is located between said means 100 and the closing profiles, 20, 22.

As indicated in the foregoing, according to a variant embodiment, sole 59 is interrupted on the other side more (i.e., recessed) of the longitudinal end of the slider, at least on the longer side of the slider. cursor corresponding to the divergent side of the corridors 590, 592, as can be seen especially in figures 40, 42, 43 and 44, and the wings 52, 54, are provided in the vicinity of their free edge opposite the base 56 , with means 520, 540, for requesting the sheets 16, 18, of the sachet, so that they approach each other, covering the entire longitudinal extension of the sole 59, and extending beyond it longitudinally, part by part thereof; way to ensure the tightness of the sachet in its closed position. According to the preferred embodiment illustrated in FIGS. 40 to 43, these biasing means are composed of ribs 520, 540, projecting towards the interior of the slider 50, in correspondence with the edge of the wings 52, 54, opposite the base 56, or, optionally, in a part of the height of the inner surface of these wings 52, 54, comprised between the free edge of the wings 52, 54 and the base 56. Note that although the ribs 520, 540, not they are necessarily located in correspondence with the free edge of the side wings 52, 54 these ribs 520, 540, however, are located below the sole 59 (ie, between the crest of the sole 59, opposite the base 56, and the free edge of the wings 52, 54), and not at the height thereof. Said ribs 520, 540, cover the sole 59 without discontinuity and extend beyond it, at least in correspondence with the longest end of the sole 59 corresponding to the diverging side of the corridors 590, 592. Said with more precision , according to the preferred embodiment illustrated in the attached figures, the yeasts 520, 540, extend over the entire length of the cursor 50, while the sole 59 is interrupted, in correspondence with its widest extremity (diverging side of the corridors 590, 592) at a distance "11" from the cursor 50, and in correspondence with its finer extremity (converging side of the corridors 590, 592), at a distance "12" from the end of the cursor. The width 16 of the free space defined between the crests of the ribs 520, 540 is substantially equal to the sum of the thicknesses of the sheets 16., 18, corresponding to the embouchure of the sachets. Thus, the cursor 50 requests or presses the sheets so that they come closer to each other, below the sole 59, and ensures the tightness of the sachet. According to the embodiment shown in the attached figures 40 to 44, two ribs 520, 540 are provided, symmetrical with each other of the same height, one on each of the wings 52, 54. As a variant, it is possible to foresee Asymmetric ribs. In this way, it is possible to provide only a single rib on one of the wings 52, 54 of the course 50. In the figures the following reference numbers have been used: 13 is the height of the sole 59, considered parallel to the wings 52 , 54 and perpendicular to the base 56, 14 is the distance between the free end of the sole 59 opposite the base 56, and the ribs 520, 540, and 15 is the width of the sole 59, corresponding to its extremity wider. Within the scope of the present invention: 11 is preferably between 1 mm and 10 mm, it being more preferable that it be of the order of 3 mm. 12 is preferably between 0.5 mm and 10 mm, it being more preferable that it be of the order of 4 mm. 13 is preferably between 2 mm and 7 mm, it being more preferable that it be of the order of 3 mm. 14 is preferably between 5 mm and 15 mm, it being more preferable that it be of the order of 8 mm. 15 is preferably between 0.3 mm and 2 mm, it being more preferable that it be of the order of 0.5 mm. 16 is preferably between 50 μm and 2.5 mm, it being more preferable that it be of the order of 200 μm. On the other hand, within the scope of the present invention: the ratio 11/15 is preferably comprised between 0.5 and 30, and more preferably is of the order of 6.; the ratio 12/15 is preferably between 2.5 and 30, and more preferably is of the order of 8; the ratio 11/13 is preferably comprised between 0.5 and 5 and more preferably is of the order of 1; the ratio 12/13 is preferably comprised between 0.1 and 5 and more preferably is of the order of 1.3; the ratio 11/14 is preferably comprised between 0.05 and 2 and more preferably is of the order of 0.4; the ratio 12/14 is preferably between 0.05 and 2 and more preferably is of the order of 0.5.

Claims

NOVELTY OF THE INVENTION CLAIMS

1. - Sachet comprising two generally parallel sheets forming the main walls of the sachet, complementary closure profiles to each other fixed on said sheets and a cursor to actuate the profiles for opening and closing, characterized in that it also comprises, parallel to the profiles of closing, between said sheets and in correspondence to the embouchure of the sachet, additional relief means disposed on the inside of the closing profiles, designed to ensure the tightness to form a containment or barrier between the sheets, the sachet being in position of closing, said additional means being in relief, adapted to be pressed towards its sealing position by the cursor when the cursor is moved towards the closing position of the sachet.

2. Sachet according to claim 1, further characterized in that the additional relief means that ensure sealing are composed of at least one bead or bead that is integral with the inner surface of a sachet sheet.

3. Sachet according to any of claims 1 or 2, further characterized in that the additional raised means that ensure sealing are composed of two weather strips secured respectively to the inner surface of the two sheets of the sachet.

4. Sachet according to claim 1, further characterized in that the additional relief means that ensure sealing are composed of elements complementary to each other, male / female, respectively secured to the inner surface of the sachet sheets.

5. Sachet according to claim 4, further characterized in that the male element has a substantially triangular section.

6. Sachet according to any one of claims 4 or 5, further characterized in that both lips of the female element are asymmetric.

7. Sachet according to any one of claims 4 to 6, further characterized in that the lip of the female element located towards the inside of the sachet with respect to the male element, is longer and more flexible than the second lip located towards the outside of the sachet.

8. Sachet according to any one of claims 1 to 7, further characterized in that the additional relief means that ensure the sealing extend over the entire length of the sachets.

9. Sachet according to any one of claims 1 to 8, characterized in that the geometry of the profiles, of the additional means and of the slider, is such that the flanks of the cursor impose on the media a transverse clearance that is less than tolerated for closing profiles.

10. Sachet according to any one of claims 1 to 9, characterized in that the internal surfaces of the flanks of the cursor are parallel and the thickness of the means is greater than the thickness defined by the closing profiles when they are coupled between yes.

11. Sachet according to any one of claims 1 to 10, further characterized in that the cursor has on the inner surface, means to ensure the solicitation of the latter by pressing them to the sealing position, on the occasion of the closure of the sachet.

12. Sachet according to any one of claims 1 to 11, further characterized in that the walls of the sachet comprise protuberances placed in front of the means and in front of the flanks of the cursor to ensure the solicitation of the means leading them to their sealing position , on the occasion of the closing of the sachet.

13. Sachet according to any one of claims 1 to 12, characterized in that it comprises on the one hand notches that open on the outer surface of the sachet, respectively facing the means, and on the other hand ribs projecting on the inner surface of the cursor flanks, said ribs are adapted to penetrate respectively said recesses.

14. Sachet according to any one of claims 1 to 13, characterized in that it comprises means forming an anti-violation veil or witness of the opening, in correspondence of the embouchure.

15. Sachet according to claim 14, further characterized in that the anti-violation veil is formed by a bellows folded towards the inside of the sachet, in correspondence of the embouchure in the continuity of support veils of the closure profiles or the additional sealing means.

16. Sachet according to claim 14, further characterized in that the anti-breach veil is formed by a bellows folded back into the sachet, in correspondence of the embouchure in the continuity of the film making up the sachet.

17. Sachet according to any one of claims 1 to 16, characterized in that the sachet is formed from a single film folded on itself in correspondence with the bottom of the sachet.

18. Sachet according to any one of claims 1 to 16, characterized in that the sachet is formed from a single film folded on itself in correspondence to the embouchure of the sachet.

19. - Sachet according to any one of claims 1 to 16, characterized in that the sachet is formed from the sheets initially separated and superimposed during manufacture.

20. Sachet according to any one of claims 1 to 19, characterized in that the complementary closing profiles and / or the additional sealing means are applied by extrusion on the sheets that make up the sachet.

21. Sachet according to any of claims 1 to 19, characterized in that the complementary closing profiles and / or the additional sealing means are formed Initially on respective support veils attached on the sheets, in correspondence to the embouchure of the sachet.

22. Sachet according to any one of claims 1 to 19 and 21, characterized in that the complementary closing profiles and the additional sealing means are initially formed on common support leaflets attached to the leaves in correspondence with the mouth of the sachet

23. Sachet according to any one of claims 1 to 22, characterized in that the closing profiles are adapted to automatically ensure a transversal stress on the means when the sachet is closed.

24. Sachet according to any one of claims 1 to 23, further characterized in that the complementary closure profiles are of the male / female type and because they comprise at least one asymmetric male or female profile.

25. Sachet according to claim 24, further characterized in that the physical height or volume of the element defining the inner lip of the female profile, is lower than the physical height or volume of the element that defines the outer lip of the female profile.

26.- Sachet according to any one of claims 1 to 23, characterized in that the complementary closing profiles are of hook type and because they have at least two pairs of complementary hooks that define widths in assembled position, different from a pair of hooks. hooks to another.

27. Sachet according to claim 26, characterized in that both complementary hooks located towards the inside of the sachet, define in assembled position, a width between the inner faces of the leaves, lower than the width considered between the same faces of the sheets in correspondence to the pair of complementary hooks located towards the outside of the sachet.

28.- Sachet according to any one of claims 1 to 27, characterized in that the additional relief means that ensure sealing are composed of two elements respectively secured to the inner surface of both sheets of the sachet and intended to rest on their crests .

29. Sachet according to any one of claims 1 to 27, characterized in that the additional relief means that ensure sealing are composed of two elements respectively secured to the inner surface of both sheets of the sachet and intended to be juxtaposed and arrive to lean in correspondence to its adjacent flanks facing globally perpendicular with respect to the leaves.

30. Sachet according to any one of the claims 1 to 27, characterized in that the cursor is provided at the ends of at least one of its side wings, with a return directed towards the interior of the sachet and positioned so as to be located beyond the sealing means.

31.- Sachet according to claim 30, characterized in that the cursor is also provided in correspondence with the end of this return, with an additional wing oriented towards the base of the cursor, that is towards the outside of the sachet.

32.- Sachet according to any one of claims 1 to 31, characterized in that the portions of the support films located in front of the closing profiles and the sealing means, have a thickness that is greater than the thickness of the rest of the film that makes up the sachet.

33.- Sachet according to claim 32, characterized in that the localized over-thickness of the films is obtained in the form of an over-thickness formed during the extrusion of the film.

34.- Sachet according to claim 32, characterized in that the localized over-thickness of the films is the result of the fixing of the support webs of the closing profiles or of the means.

35.- Sachet according to any one of claims 3 and 28, characterized in that both elements, which are respectively integral with the inner surface of the leaves, are provided on their crest with at least one respective wing that is orthogonal with respect to said elements. .

36.- Sachet according to any one of claims 3 and 29, characterized in that at least one of both elements provided in the support sheets, is provided on its crest with an orthogonal wing intended to come to rest against the inner face of the opposite leaves.

37.- Sachet according to any one of claims 3 and 29, characterized in that at least one of both elements provided in the support sheets, is provided on its crest with a rounded excrescence.

38.- Sachet according to claim 31, characterized in that the cursor is also provided in correspondence of the end of this return, with a protrusion oriented towards the base to request (press) both juxtaposed elements that are supported by their flanks adjacent.

39. Sachet according to any one of claims 1 to 38, characterized in that the portions of support films carrying the closure profiles and the sealing means are not located in the direct extension of the leaves that make up the body of the container. sachet, but are offset to the outside of the sachet in correspondence to the respective entrants.

40.- Sachet according to claim 39, characterized in that one of the recesses is in turn provided with an extension towards the opposite support sheet.

41.- Sachet according to any one of claims 3 and 29, characterized in that at least one of both elements has an increasing thickness in the direction of its ridge or has a flank inclined in such a way that exerts an effort on the other element juxtaposed, the sachet being in the closed position.

42. Sachet according to any one of claims 1 to 41, characterized in that the sealing means comprise flexible and elastic structures, to be deformable on the occasion of sachet closure.

43. Sachet according to any one of claims 1 to 42, characterized in that the over-thickening means comprise at least one bent, flexible and elastic lip, integral with the sheet carrying some of the closing profiles.

44. - Sachet according to claim 43, characterized in that the lip is formed by a cylinder sector whose angle at the center is greater than 180 degrees.

45.- Sachet according to any one of claims 43 or 44, characterized in that the sachet being open, said lip extends beyond the associated closure profile, such that when the sachet is closed, said lip exerts a pressure on the opposite sheet.

46.- Sachet according to any one of claims 43 to 45, characterized in that the location of the lip and the geometry of said lip are such that said lip, when it rests on the opposite sheet, receives a reaction that requests or presses it to turn so that it rests against some of the closing profiles.

47.- Sachet according to claim 46, characterized in that the solicitation of the lip so that it rests against the female closing element is reinforced by the presence on the inner surface of the flanks of the protrusion slider.

48. Sachet according to claim 47, characterized in that the protuberances converge towards the upper base of the cursor while the end of the cursor located on the side of the sachet opening approaches.

49. Sachet according to any one of claim 1 to 48, characterized in that each of the two sheets is provided on its inner surface with an elastic lip in the form of cylinder sector designed to get to rest on its crest on occasion of the closing of the sachet.

50.- Sachet according to any one of claims 1 to 48, characterized in that each of the two sheets is provided on its inner surface with an elastic lip in the form of cylinder sector designed to be laterally juxtaposed.

51. Sachet according to any one of claims 1 to 50, characterized in that it comprises at its embouchure, means located opposite said additional sealing means, with respect to the closing profiles and adapted to define a support between the internal faces opposite of the walls of the sachet, and provided in the cursor appropriate means to request the walls of the sachet by pressing them inwards, towards an area of these walls comprised between the additional sealing means and the support means.

52. Sachet according to claim 51, characterized in that the solicitation normally takes place with respect to the closing profiles.

53.- Sachet according to any one of claims 51 or 52, characterized in that the additional sealing means are located inside the closing profiles, while the means defining the support are located on the outside of the profiles closing.

54.- Sachet according to any one of claims 51 to 53, characterized in that the additional sealing means are formed by two flexible and elastic lips.

55.- Sachet according to any one of claims 51 to 54, characterized in that the support means are formed by two elements that are respectively integral with the inner faces of the walls in correspondence with the embouchure of the sachet.

56.- Sachet according to claim 55, characterized in that these elements are in reciprocal support, the sachet being in closed position, in the median plane thereof.

57. Sachet according to claim 55, characterized in that these elements are in reciprocal support, the sachet being in closed position, outside the median plane thereof.

58.- Sachet according to any one of claims 51 to 57, characterized in that the support means are made of a material, possibly of several materials, preferably applied by extrusion, together with the walls of the sachet.

59.- Sachet according to any one of claims 51 to 57, characterized in that the support means are made of a material, possibly of several materials, preferably applied by extrusion, on attached support sheets, for example by welding or gluing , on the walls of the sachet.

60. - Sachet according to any one of claims 51 to 59, characterized in that the sections of the walls between the sealing means and the support means are thicker than the leaves that make up the rest and the essentials of the sachets.

61.- Sachet according to any one of claims 51 to 60, characterized in that the biasing means comprise protuberances on the inner surface of the wings of the cursor.

62. Sachet according to any one of claims 51 to 64, characterized in that the means of solicición comprise protuberances on the walls of the sachet.

63.- Sachet according to any one of claims 61 or 62, characterized in that the protuberances are normally provided with respect to the closing profiles.

64.- Sachet according to any one of claims 51 to 63, characterized in that the ends in front of the elements forming support means are widened, being for example of generally triangular cross section.

65.- Sachet according to any one of claims 1 to 64, characterized in that the elements that make up the sealing means are co-extruded together with the sachet and / or the closing profiles, of a material that is more flexible than the material forming the latter, for example an ethylene copolymer and / or a synthetic elastomer.

66.- Sachet according to any one of claims 1 to 65, characterized in that said relief means are placed opposite the flanks of the cursor.

67.- Film for the production of a sachet according to any one of claims 1 to 66, characterized in that it comprises closing profiles that are complementary to each other operable by means of a cursor, and additional means in relief arranged inside the profiles closing, designed to ensure a tightness to form a containment or sweep between the sheets intended to forms the sachet, being, the sachet in its closed position.

68.- Film according to claim 67, characterized in that the additional relief means that ensure sealing are composed of at least one weather strip.

69.- Film according to any of claims 67 or 68, characterized in that the additional relief means that ensure sealing are composed of two weather strips.

70.- Film according to claim 67, characterized in that the additional raised means that ensure the sealing are composed of complementary elements male / female.

71.- Film according to claim 70, characterized in that the male element has a substantially triangular section.

72.- Film according to any one of claims 70 or 71, characterized in that both lips of the female element are asymmetric with each other.

73.- Film according to claim 67, characterized in that the additional relief means that ensure sealing are composed of elements intended to be juxtaposed and to come to rest in correspondence with their adjacent flanks globally opposite and perpendicular to the leaves.

74.- Film according to claim 67, characterized in that the additional relief means that ensure sealing comprise at least one bent, flexible and elastic lip.

75.- Film according to any one of claims 67 to 74, characterized in that it comprises means located opposite said additional sealing means, with respect to the closing profiles, and adapted so as to define a support between the opposite inner faces of the walls of the sachet.

76.- Extruded strip for the realization of a sachet according to any one of claims 1 to 66, characterized in that it comprises relief means disposed inside the closing profiles, designed to ensure a tightness when forming a containment or barrier between the sheets intended to form the sachet, the sachet being in the closed position.

77. - Strip according to claim 76, characterized in that it also comprises at least one closure profile operable by a slider on a support web common to said relief means.

78. Strip according to any one of claims 76 or 77, further characterized in that the embossed means that ensure sealing are composed of at least one weather strip.

79.- Strip according to any one of claims 76 to 78, characterized in that the embossed means that ensure sealing are composed of two weather strips.

80. Strip according to any one of claims 76 or 77, characterized in that the raised means that ensure the tightness are composed of male / female elements.

81. Strip according to claim 80, characterized in that the male element has a substantially triangular section.

82. Strip according to any one of claims 80 or 81, characterized in that the two lips of the female elements are asymmetrical with each other.

83. Strip according to any one of claims 76 to 82, characterized in that the additional relief means that ensure sealing are composed of elements intended to be juxtaposed and come to rest in correspondence with their adjacent flanks facing, globally perpendicular to leaves.

84. Strip according to any one of claims 76 to 83, characterized in that the additional raised means that ensure the seal comprise at least one bent, flexible and elastic lip.

85. Strip according to any one of claims 76 to 84, characterized in that it comprises means located opposite said additional sealing means, with respect to the closing profiles, and adapted so as to define a support between the opposite internal faces. of the walls of the sachet.

86.- Sachet according to any one of claims 1 to 66, comprising two general sheets parallel to each other forming the main walls of the sachet, complementary closure profiles fixed respectively on said sheets in correspondence to the embouchure of the sachet and a a cursor comprising two lateral wings joined together in correspondence of a base, placed on the outside of the leaves in correspondence of the opening of the sachet and defining together with an elongated central sole two converging passageways for the complementary closing profiles, characterized in that the sole is interrupted in withdrawal from the longitudinal end of the cursor, at least on the wider side of the cursor corresponding to the diverging side of the passageways, and because the lateral wings are provided in the vicinity of their opposite free edge. at the base, with means for soliciting the sachet leaves to come between Yes, they cover the entire longitudinal extension of the sole and extend beyond it longitudinally from side to side of it, in order to ensure the tightness of the sachet when it is in its closed composition.

87. Sachet according to claim 86, characterized in that the means of solicitation are composed of ribs protruding towards the interior of the slider, in correspondence with the edge of the wings opposite the base, or on a part of the height of the inner surface of these wings comprised between the free edge of the wings and the base.

88. Sachet according to claim 67, characterized in that the ribs are located below the sole, and not at the height thereof.

89.- Sachet according to claim 87 or 88, characterized in that the ribs extend over the entire length of the cursor, while the sole is interrupted, in correspondence with its wider extremity, at a distance from the end of the cursor.

90. Sachet according to any one of claims 86 to 90, characterized in that the sole is also interrupted in correspondence with its thinnest extremity (converging side of the corridors), at a distance from the end of the cursor.

91. Sachet according to any one of claims 87 to 90, characterized in that the width of the free space defined between the ridges of the ribs is substantially equal to the sum of the thicknesses of the leaves, in correspondence with the mouth of the ribs. sachets

92. Sachet according to any one of claims 87 to 91, characterized in that the cursor comprises two symmetrical ribs of the same height, one on each of the wings.

93. Sachet according to any one of claims 87 to 91, characterized in that the cursor comprises asymmetric ribs, or a single rib on any one of the wings of the cursor.

94. Sachet according to any one of claims 86 to 93, characterized in that the distance separating the wide end of the sole and the end of the cursor, is between 1 mm and 10 mm, and preferably is the order of 3 mm

95. Sachet according to any one of claims 86 to 94, characterized in that the distance separating the thin end of the sole and the end of the cursor is between 0.5 mm and 10 mm, and more preferably is the order of 4 mm.

96.- Sachet according to any of claims 86 to 95, characterized in that the height of the sole is between 2 mm and 7 mm, and preferably is of the order of 3 mm.

97. Sachet according to any of claims 86 to 96, characterized in that the distance separating the ridge and the means of solicitation, is between 5 mm and 15 mm, it being very preferable that it is of the order of 8 mm.

98. Sachet according to any one of claims 86 to 97, characterized in that the thickness of the sole at its wide end is between 0.32 mm and 2 mm, preferably of the order of 0.5 mm.

99. Sachet according to any of claims 86 to 98, characterized in that the width of the opening made between the means of solicitation is between 50 um and 2.5 mm, being most preferable that it be of the order of 200 um .

100.- Sachet according to any one of claims 86 to 99, characterized in that the relation between the distance separating the wide end of the sole and the end of the cursor and the thickness of the sole at its wide end, is preferably found between 0.5 and 30, and very preferably is of the order of 6.

101. Sachet according to any one of claims 86 to 100, characterized in that the relationship between the distance separating the fine end of the sole and the end of the The cursor and the thickness of the sole at its wide end, is preferably between 2.5 and 30, it being very preferable that it be of the order of 8.

102. Sachet according to any one of claims 86 to 101, characterized in that the relationship between the distance separating the wide end of the sole and the extremity of the cursor and the height of the sole, is preferably comprised between 0.5 and 5, being very preferred It should be the order of 1.

103.- Sachet according to any one of claims 86 to 102, characterized in that the relationship between the distance separating the thin extremity from the sole and the extremity of the cursor and the height of the sole , it is preferably comprised between 0.1 and 5, being very preferable that it be of the order of 1.3.

104. Sachet according to any one of claims 86 to 103, characterized in that the relationship between the distance separating the wide end of the sole and the extremity of the cursor and the distance separating the crest of the sole and the means of solicitation, it is preferably comprised between 0.05 and 2, being very preferable that it be of the order of 0.4.

105. Sachet according to any of claims 86 to 104, characterized in that the relationship between the distance separating the thin extremity from the sole and the extremity of the cursor and the distance separating the crest of the sole and the means of solicitation, is preferably comprised between 0.05 and 2, being most preferable that it be of the order of 0.5.