FR2620426A1 - PACKABLE PACKAGE WITH INTERNAL SACHET AND METHOD OF MANUFACTURE - Google Patents

Abstract

The present invention relates to a collapsible package of the type comprising a substantially parallelepipedal cardboard box and a flexible inner bag. The flexible inner bag is glued before filling on the side faces 5 to 8 of the box 1 as well as on the closing tabs 9 to 12 in gluing zones 23 to 26 having the shape of an isosceles triangle. One of the closure tabs 12 may constitute a pouring spout. The invention also relates to a method of making a box consisting of depositing a blank on an assembly machine, gluing the gluing zones 22 to 26, depositing the flexible bag on the glued zone and folding the remainder. from the box onto the bag. Applications: semi-sealed packaging for spraying materials, liquids, food products.

Description

- 1 -

  The present invention relates to a foldable package

  as well as a method of manufacturing such a package.

  It relates more particularly to a foldable package consisting on the one hand, of a box of the type comprising four lateral faces extended by foldable closing tabs constituting in folded position, the bottoms of said box and on the other hand, a bag flexible interior, the section of said flexible bag being substantially identical to

the section of the box.

  Foldable packaging is known in the state of the art with a flexible inner bag made from a cardboard box in which one introduces a bag after filling the latter. Such packages require many manipulations of the box on the one hand and the bag before and after filling on the other hand and

  automation of these operations is difficult.

  Moreover, this type of packaging requires the delivery and storage of two separate elements, namely the box

  on the one hand and the bag on the other, before use.

  Also known in the prior art under the trade name "BAG IN BOX", a package consisting of a cardboard box provided with a flexible sheath, including plastic, open at each end. These packages

can be delivered flat.

  When using them, you must first seal the bottom of the sheath and then constitute the lower bottom of the box by folding the closing tabs. We

  can then proceed to fill the sheath.

  The closure of the package is effected by successively closing the bag then the box. The closure of the bag is usually done manually and can be done

  by simply folding the edges of the bag or by sealing.

  In addition to the many operations required to package a product using this type of packaging, it is very difficult to obtain a sealed seal of the inner sheath and this type of packaging is therefore more suitable for packaging materials. in granulated form of large dimensions that conditioning pulverized materials

even liquids.

  The object of the present invention is to remedy these drawbacks by proposing a foldable, watertight package which can be shaped automatically on

  existing packaging machines.

  It relates more particularly to a foldable package consisting of an inner bag stuck on the side faces of the box, before filling, the open end of the flexible bag being glued to the foldable closure tabs in sizing areas included in a triangle isosceles whose height is substantially equal to the height of the shortest of the closing tabs and the base substantially

  equal to the width of the closing tab.

  The open end of the bag thus being secured to the closure tabs of the box, the closure of the open end of the package is simply done by

  folding said closing tabs.

  The characteristics of the sizing surface allow for particularly easy closure. It suffices to fold outwardly two opposite closure tabs, preferably the largest, which causes the folding inward of the two other opposite closure tabs and the partial folding of the bag

flexible interior.

  Then holding the two closing tabs already folded and folding the other two legs inward, we get a near-tight bottom. Of course, the last two opposite legs are stuck on

  the first two so that they stay in place.

  The inner bag can be opened at both ends or closed at the origin by any method at one

from its ends.

  The gluing area can be totally covered with glue or glue-only at different points distributed as points or bands on the triangle

isosceles considered.

  In a preferred embodiment, the foldable package of the present invention is provided with a bellows plastic interior bag having a

lower is closed.

  The principle of obtaining such bags is of current manufacture in the profession. From a plastic film delivered generally in coil, a sheath is formed

  by folding said film on itself along its median axis.

  After forming the lower part of the sheath with a finger creating a section W, a movable heating blade seals the bottom of the bag and cuts the

bag of the rest of the film.

  The packaging formed according to this variant can be very easily D flat or volume and its use on a packaging machine of known type does not pose

no difficulty.

  To do this, it suffices to close the lower bottom by folding, in a known manner, the closing tabs and to fill the box provided with its inner bag. The closure of the packaging is thus carried out in the same manner as described above. According to a preferred embodiment, the box is

made of cardboard preraine.

  O It is thus possible to realize the box from

  cardboard cuttings according to the usual techniques.

  According to an advantageous embodiment, the box has two opposite side faces, long and two opposite side faces, wide, the wide side faces being provided with short closure tabs of a height substantially equal to half the length of the box and the long side faces being provided with high closing tabs, of a height substantially equal to the

width of the box.

  O0 The closure of the open end of the box is effected by folding, first of all, the short closure tabs which each arrive substantially at half the width of the box, then by folding on the two closure tabs short the first high closing tab, gluing, and gluing and folding

  the second short closing tab.

  The short closure tabs are advantageously folded by spreading outwards the high closing tabs which causes the automatic folding 4 of said short closure tabs because of the tension created by the flexible bag glued on each of the closure tabs. The terms "wide", "long" and "high" have no significance as to the respective dimensions of the side faces or legs and serve only to distinguish them

between them.

  According to a preferred embodiment, the broad side faces comprise a median band pre-finished in

the meaning of the height of the box.

  This embodiment avoids that the bottom of the bag is twisted after opening and shaping the package, this twisting limiting the strength of the inner bag which

  can tear when filled with a heavy product.

  It also removes the frosting of the bag and the difficulties of opening the bag at the time of shaping. Moreover, the packaging thus formed can be more easily shaped, the package being delivered flat, folded at the two middle ribs. Formatting

  exerts a perpendicular lateral pressure

to the two middle ribs.

  According to a preferred embodiment, the open end of the bag protrudes from the short flaps

  between 10 and 30 mm in length.

  This excess allows sealing of the upper end of the bag at the time of closure of the package. This sealing is done by pressing the lips protruding from the short legs folded between two heating blades. The sealing of the bag thus sealed is sufficient to prevent any flow of liquid and isolate

  the contents of the bag of ambient air.

  This gives a good recovery of the edges of the bag

  inside at the time of closing.

  According to an advantageous variant, one of the legs of

closure forms a spout.

  To implement this spout function, after closing the foldable package, the upper face of the box is peeled off, by raising the first closure tab and cutting with a chisel a strip of

  this tab parallel to the bottom of the box, passing

  below the upper point of the gluing triangle.

  The bag is thus pierced and may leak a liquid. Moreover, the middle raining creates a gutter

  facilitating the smooth flow of the liquid.

  The packaging thus formed can even be closed with a sufficient seal by folding the tab of

closing on the bottom of the box.

  According to a particular embodiment, the box comprises, on at least part of its surfaces, a

transparent window.

  This transparent window, glued on the cutout before the constitution of the box, makes it possible to make visible the

contents of the packaging.

  In another variant, the package according to the present invention provides a space between the bottom of the box and the

bottom of the inner bag.

  O This space can be used to hold a second

  article, for example, ur.e tin can or container.

  The present invention also relates to a method of manufacturing a foldable package consisting of a box and

a flexible inner bag.

  According to a first variant, the cutout of the

  box on an assembly machine.

  On the inner surfaces of the box, strips of adhesive are deposited along at least some of the grooves of the lateral faces and on the sizing surfaces included in the isosceles triangle of the closing tabs. The bellows bag is then deposited flat on the cut thus glued, substantially symmetrically with the central axis of one of the large lateral faces. Then folds the side face provided with a connecting tab on the large side face on which is disposed the bag. We then glue the connecting leg and fold the others

  side faces on the remainder of the cut.

  This embodiment is fully compatible with the use of machines usually used for making folding carton boxes from

of a pre-cut cut.

  This method makes it possible to automatically obtain packagings according to the invention, flat. This process is more specifically intended for boxes having no median rainant. According to another preferred embodiment, the flexible bag is disposed between the two medial grooves provided on the long side faces. Then folds the portion of the blank provided with a connecting lug according to the groove closest to said connecting lug to superpose on the side face on which the bag is placed. The connecting lug is then glued and folded according to the other median groove, the second part of the

  cut to get the package flat.

  This embodiment makes it possible to obtain a packaging

  flat of the type having two median rainants.

  Other advantages and embodiments will emerge

  better description which will follow and which will be based on

  FIG. 1 shows a top view of a box blank provided with the inner bag; FIG. 2 is a perspective view of a package according to the present invention being closed, FIG. represents a perspective view of a

  example embodiment box with a spout.

  The foldable package according to the present invention is

  composed of a box (1) and a flexible bag (2).

  The flexible bag (2) has in the example described an open upper end (3) and a lower end

closed (4).

  It is advantageously made of a material

  transparent plastic of the polyethylene or polypropylene type.

  It can also be made of any other flexible material, such as paper, aluminum, aluminized plastic material. The bag (2) is a bellows bag made from a flexible sheath usually delivered in coils, cut with a hot cutting blade, one of whose ends is sealed after formation. bellows

folding of the film on itself.

  This gives a bag of the desired dimensions, that is to say whose section substantially corresponds to the section of the shaped box and whose height corresponds in the example described, substantially to the sum of the height of a lateral face (5) of the box (1) and the height of a closing tab (9) increased by a length

  substantially equal to one tenth of the height of the box.

  This ratio of 1/10 is given as an indication but may vary in significant proportions without

  question the operation of the invention.

  The box (1) is advantageously made of cardboard,

  especially in micro-fluted cardboard or solid cardboard.

  It has two wide side faces (5) and (7) and two long side faces (6) and (8). The indications of "wide", "long" and "high" do not prejudge in any way the respective dimensions of the package. Thus the width may be greater than the length, itself greater than the height or the height greater than the length, itself greater than the width and any other

relationship is conceivable.

  One of the outer lateral faces (5) has a connecting lug (13) corresponding to a sizing and connecting zone (14) located on the face

lateral (8) opposite.

  The lateral faces (5, 6, 7, 8) have at their upper end closure lugs respectively (9, 10, 11, 12) and at their lower end legs of

  closing respectively (15, 16, 17, 18).

  The wide side faces (5, 7) are provided with upper tabs respectively (9, 11) and shorter tabs respectively (15, 17) short, that is to say a height substantially equal to the length of the faces long sides (6, 8). When the box is placed in volume, each of said short tongues (15, 17, 9, 11) covers substantially half of the bottom surface of the box (1). They can without hindering the fon2ti-n. ert of inrventionr. overlap partially in the closed position or on the contrary, -8-

to spare a free space.

  The large upper legs (10, 12) and the large lower legs (16, 18) have a height substantially

  equal to the width of the broad side faces (5, 7).

  Preferably, one of the large upper tabs (10) intended to be folded down before the second large upper tab (12), has a height slightly smaller than the width of the wide lateral face (5), so as to allow a folding easy of the second large upper leg (12) whose surface is substantially equal to the

surface of the bottom of the box.

  It is the same for the lower end of the

box (1).

  The cardboard blank further includes fold grooves (19) at the locations corresponding to the edges of the box. These folding grooves (19) make it easier to

shape of the box (1) by folding.

  The cutout further comprises two grooves (20, 21) extending along the central axis of the long lateral faces respectively (6, 8) and on the closing tabs respectively (10, 16) and (12, 18). ) that extend them. These two middle grooves (20, 21) allow to give the box, before folding the closing tabs (9 to 12) and (15 to 18), a substantially hexagonal section. The flexible bag (2) is glued to the cutout of the box (1) in a first step using adhesive strips (22) parallel to the folding grooves (19) and arranged along said folding grooves (19). ) an unsized tape

a few millimeters wide.

  The geometry of these gluing zones is given as an indication and it is possible, without modifying the operation of the invention, to replace them with zones of various shapes inasmuch as gluing takes place substantially over the entire height of the elements. side faces and over the entire width of the bellows bag when it is flat. The other bonding strips (22) come into contact with the inner bag (2) when the uncovered portions of the blank of the bag are folded over the covered portion of the bag at the time of constitution of the flat box. These uncovered portions of the pouch are folded around the grooves (20, 21). The upper lugs (9 to 12) comprise a sizing zone included in isosceles triangles respectively (23, 24, 25, 26) whose height is substantially equal to the height of the small closure lugs (9, 11). The base of the isosceles triangles (23 to 26) has a width substantially identical to the width of the leg

  closing respectively (9 to 12) corresponding.

  Sizing can be performed on all of these isosceles triangles (23 to 26) or at only certain points of these isosceles triangles, for example, in a median band extending substantially symmetrically with respect to the height of said isosceles triangle or still in three points located on the three angles of the isosceles triangle, or in the form of "T" whose branches correspond to the height and

at the base of said isosceles triangle.

  Figure 2 shows a package at the time of closure of the closure tabs (9 to 12). Folding the closing tabs (10, 12) outwards in the direction indicated by the arrows "F" causes green folding of the inside of the closing tabs (9, 11).

  following the direction of the arrows "F".

  Making a box of a package according to the

  The present invention is carried out as follows.

  First of all, on an assembly machine, a cutout corresponding to the box (1) is deposited. Then, using a gluing machine, a film of glue on the areas

sizing (22, 23, 24, 25 and 26).

  The flexible pouch is then placed on the cut and glued flat between the two grooves (20, 21), matching the edge delimiting the lower bottom of the box (1) and the bottom bottom of the flexible bag. The part of the uncovered cutout of the bag is then folded down and provided with the connecting tab (13) on the portion of the cutout provided with the bag, then the other is folded up.

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  uncovered part of the bag on the first part provided

  of the bag and on the connecting lug (13).

  By pressing on the flat box thus formed, the bag is glued on all the sizing areas provided on the lateral faces and on the closing tabs. The boxes can thus be stored and delivered flat. Their shaping is effected by exerting a lateral pressure on the large lateral faces (6, 8) provided with middle grooves (20, 21). The box thus takes up a rectangular section whose maintenance is ensured by the

  folding of the lower closing tabs (15 to 18).

  These lower closure tabs (15 to 18) can

constitute an automatic fund.

  After filling the flexible inner bag (2), the upper part of the package is closed by spreading out the large closing tabs (10, 12) and keeping the small closing tabs in the closed position. (9, 11). The top edge of the bag

  exceeds the top and forms two lips appreciably joined.

  These lips are sealed with two heated blades. This gives a near perfect seal. The smallest of the large closing tabs (10) are then folded over the small folded tabs by gluing and gluing.

  on it the largest of the large closing tabs (12).

  FIG. 3 represents a perspective view of a

  packaging provided with a closing tab forming a spout.

  The opening of the package is effected by unfolding the largest closure tab (12) and cutting a strip parallel to the upper bottom of the box (1) and cutting the point of the isosceles triangle sizing (26) . The other three closure tabs (9, 11) remain in the closed position. Cutting the closure tab (12) and the bag (2) creates an orifice through which liquid can flow. Moreover, the weight of the liquid exerted on the lateral face (8) causes at the middle grooves (21) a

  gutter facilitating the smooth flow of the liquid.

  The packaging has been described by way of non-limiting example. The present invention is therefore not limited to

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  particularities explained so as to allow a good understanding of the invention but extends on the contrary to all the variants and embodiments compatible with obtaining the desired result, according to the general means considered.

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Claims (7)

R E V E N D I C A T I 0 N S   1) Foldable packaging consisting on the one hand of a box (1) of the type comprising four lateral faces (5 to 8) extended by closing tabs (9 to 12) and (15 to 18) constituting, in the folded position , the bottoms of said box (1) and, on the other hand, of a flexible inner bag (2), the section of said flexible bag being substantially identical to the section of the box (1), characterized in that the inner bag (1) is bonded to the side faces (5 to 8) before filling said bag, the open end of the inner bag (2) being glued to the closing tabs (5 to 8) foldable into sizing areas included in triangles (23 to 26) whose height is substantially equal to the height of the shortest of the closing tabs (9 to 12) and the base substantially equal to the width of the tab of   -Closing (9 to 12) corresponding.   2) foldable packaging according to claim 1, characterized in that the inner bag (2) consists of a bellows plastic bag whose end lower is closed.   3) Foldable package according to any one of   claims 1 and 2, characterized in that the box is made of cardboard prérain6.   4) Foldable package according to any one of   Claims 1 to 3, characterized in that the box (1)   has two long opposite side faces (6 and 8) and two broad side faces (5 and 7), the lateral faces (5, 7) being provided with two short closing tabs (9, 11) of a height substantially equal to half the length of the long side faces (6, 8) and the long side faces (6, 8) being provided with large closing tabs (10, 12) of a height substantially equal to the width of the side faces (5, 7).   Foldable package according to claim 4, characterized in that the wide lateral faces (5, 7) comprise a median strip (20, 21) pre-formed in the direction the height of the box. - 13 -   6) Foldable package according to any one of   Claims 1 to 5, characterized in that the end   open bag (2) exceeds the short folding legs (9, 11) of a height substantially equal to one tenth of the length of the box. 7) Foldable package according to any one of   Claims 4 to 6, characterized in that it comprises a   large closing tab (12) forming a spout.   8) Foldable package according to any one of   Claims 1 to 7, characterized in that the box   has on a water less of its surfaces, a transparent window. 9) Foldable package according to any one of   claims 2 to 8, characterized in that it provides a   space between the lower bottom of the box and the closed bottom the bellows bag.   A method of manufacturing a foldable package consisting of a box and a flexible inner bag, characterized in that the cutout of the box (1) is disposed on an assembly machine, and is deposited on the surfaces interior of the belte glue strips (22) along at least some of the grooves of the lateral faces (5 to 8) and that is glued isosceles triangles sizing (23 to 26), which is deposited the bag bellows flat on the cut and glued substantially symmetrically with the central axis of one of the side faces (7), which is then folded the side face (5) provided with a connecting lug (13) on the part of the cut covered with the flexible bag (2), that is glued the connecting tab   (13) and then fold the other side faces.   11) A method of manufacturing a foldable package consisting of a box provided with two wide side faces (5, 7) having a central pre-shaped line (20, 21) and a flexible inner bag, characterized in that the bag flexible is disposed between the two intermediate lines (20, 21) median, that is folded the portion of the blank provided with a connecting lug (13) along the prerine line (20) closest to said connecting lug (13) for superimposing said portion on the flexible bag (2) and that - 14 -   the other non-covered portion of the flexible bag is then folded.