FR2898876A1 - Double self-lock package forming device for packing e.g. alcohol bottle, has internal flaps with free ends oriented in direction of distal end to fold flaps during insertion of blank and to form wedging stop - Google Patents

Abstract

The device has an open end box (90) obtained from transparent sheet and comprising internal flaps disposed close to a proximal end (106), which facilitates the insertion of a blank (10) supporting products (P1, P2). Each flap has a free end oriented in the direction of a distal end to fold the flap during the insertion of the blank and to form a wedging stop to prevent the removal of the blank. The blank has external flaps forming another wedging stop by locking the internal and external flaps during sliding of the blank, which is made of paper, card board or plastic material. Independent claims are also included for the following: (1) a blank for a package forming device (2) a method for fabricating a blank.

Description

The present invention essentially relates to a device forming a

  self-locking package, preferably doubly self-locking.

  STATE OF THE ART It is known from the prior document by the company Cosfibel FR-A-2,871,142 a device forming a self-locking package, comprising on the one hand an outer casing in the sheath comprising two open lateral ends, respectively referred to as the proximal end and distal end, allowing the insertion of an inner member comprising at least one housing for containing and presenting one or more products, such as for example an alcohol bottle or a cosmetic bottle. This known device comprises on the outer casing or sheath on one side at least two notches obtained by cutting into the surface of the face, defining at least two lugs folded inward, at least one of which is disposed adjacent to each end open, serving to insert the inner member for containing said product, said lugs being arranged to have their free end oriented towards the central portion of the face, so as to fold during the insertion of the internal member from the outside and to form a stop abutment preventing the backward movement of the inner member once it has passed said pin. On the other hand, the inner member comprises at least one transverse edge intended to cooperate with the lugs so as to provide a locking surface with self-locking effect of the inner member between the lugs. See claim 1 and the figures of this prior document.

  OBJECTS OF THE INVENTION The main purpose of the invention is to solve the new problem by providing a device which forms a eutoblocking, preferably doubly self-locking, cushioning device in a safe and reliable manner, which can be used on an industrial scale. and commercial. The main purpose of the invention is to solve this new technical problem according to a solution that is particularly simple, implement an uncomplicated manufacturing process, preferably simpler or in any case less expensive than the manufacturing processes of the prior art and in particular that of the document of the STATE OF THE TECHNIQUE above.

  SUMMARY OF THE INVENTION The present invention solves for the first time all of the above technical problems, in a safe and reliable manner, usable on an industrial and commercial scale. Thus, according to a first aspect, the present invention provides a device forming a self-locking package, preferably doubly self-locking, comprising on the one hand an outer casing or sleeve comprising two open lateral ends, respectively said proximal end and distal end, allowing the insertion of an inner member comprising at least one housing for containing and presenting one or more products, such as for example an alcohol bottle, a cosmetic bottle, a candle or any object of cylindrical, conical, square or parallelepiped shape and characterized in that a) the outer shell or sheath comprises on one side at least one inner flap, preferably at least two inner flaps, obtained by folding at least one extension of the surface of said face to the inside of the sheath, at least one of which is disposed in the vicinity of an open end used for the insertion of the element internal holder for containing said product, each flap of the sleeve being arranged to have its free edge oriented towards the other open end, so as to fold substantially completely upon insertion of said inner member from the outside, and forming a first stopper preventing the complete exit of the inner member once it has passed said flap; and b) said element intended to support said prodt_itr) comprises, on an external face facing the inner surface of the sheath comprising the internal flap, at least one outer flap, preferably at least two outer flaps, obtained (s). ) by folding at least one, preferably at least two, extensions) of said outer surface towards the flap of the sheath, so as to provide a second self-locking locking stop of the respectively internal and external flap (s) (s) by snapping into each other during a sliding back of the inner member to the outside of the sleeve, prohibiting a complete exit thereof. According to an advantageous embodiment of the invention, the or each inner flap of the sheath is provided substantially at the edge of an inner face of an open end by the distal or proximal end; and the outer flap of the inner member is also provided substantially at an edge of an outer face to be positioned facing the inner member but the other open end respectively proximal or distal, so as to that snapping between the flaps occurs while the inner member is almost completely out of the sleeve, to allow the introduction of the product or products to be packaged. According to another advantageous embodiment of the invention, the sheath has a substantially parallelepipedal shape, comprising an upper face, a lower face, two so-called longitudinal side faces and two transverse lateral faces; and, correspondingly, the inner member also has a substantially parallelepipedal shape comprising an upper face, a lower face, two so-called longitudinal side faces and two lateral faces said transverse. According to another particular variant embodiment of the invention, the inner element is characterized in that it is provided on the opposite side to the side comprising the outer flap, of at least one means forming an insertion stop stop. the inner element inside the sheath. According to yet another advantageous embodiment of the invention, the inner element is formed from a substantially plane sheet by appropriate cutting, in particular to define the aforementioned flaps, according to a particularly advantageous embodiment of the inventive element. eele, the element 1-1re: 1 is obtained by cutting a foil sensibiemer: plane to obtain first a sensibly rectanellar shape and on which there are provided various transverse lines of folding substantially parallel to the transverse edges opposed, at a predetermined distance from the transverse end edge of the inner member, separated from each other by a predetermined distance to define said substantially parallelepipedal shape in the folded state, according to yet another advantageous embodiment of the invention, certain fold lines of the sheet intended to form the inner element are provided to enable the realization of substantially in the vicinity of each end of the inner member, in the mounted position, at least one, and preferably two, transverse surfaces inclined at about 450 and facing each other, each inclined surface comprising at least one housing for receiving in part the product packaged, such that said product can be firmly held by cooperation of said housings present in each inclined surface. According to a particular embodiment, said housing comprises an opening made by a partial cut of a wall portion of said inclined surface defining a movable flap for wedging and maintaining said product in said opening. According to another particular embodiment of the internal element, it is made of a self-supporting material, flexible, such as paper, cardboard or a plastic material such as polyethylene, polypropylene, PVC, polyester such as PET , it can be monolayer or multilayer, thus allowing to significantly reduce the manufacturing cost of the inner member. According to yet another advantageous embodiment of the invention, the sleeve is also made from a substantially plane sheet by appropriate cutting, and folding along several fold lines substantially parallel to two opposite edges of said sheet, to define after folding said two respectively proximal and distal end openings. According to a particular embodiment of the invention, the sheath has a substantially parallelepipedal final shape, and is obtained from said substantially planar sheet, by cutting to the appropriate size, and folding over several ihc (bending res substantially parallel to the two opposite transverse edges of said sheet, to define after folding said two respectively proximal and distal end openings.

  According to another particular embodiment of the invention, the sheath is obtained from a transparent sheet made of a self-supporting material, flexible but not extensible, for example plastic material such as a material used to form an element of blister type such as a sheet of polyethylene, polypropylene, PVC, polyester such as polyethylene terephthalate or PET etc., as is well known to those skilled in the art. According to a second aspect, the invention also covers as a new product, the internal element as defined above and as described with reference to the drawings, which complete the description, and which form an integral part of the invention.

  According to a third aspect, the present invention further covers a method of manufacturing this inner member. This method of manufacturing the inner member comprises a) providing a substantially planar sheet having longitudinal and transverse outer edges; b) cutting said sheet into a substantially rectangular shape and with formation at least on each longitudinal outer edge of at least one flap for forming a stopper; c) producing various transverse fold lines substantially parallel to said transverse edges, with appropriate shaping tools; separated from each other by a predetermined distance to define a substantially parallelepiped shape in the folded state; this step of forming the fold lines can be performed concomitantly in the cutting state or independently thereof; d) folding said sheet according to said transverse fold lines to form said inner member having in the folded state, a substantially parallelepiped shape. According to an advantageous embodiment of this method, certain lines, be it a folding file of the sheet intended to form the inner element, are provided to enable the position of the element nr to be substantially corrected in the position mounted, at least one, and preferably two surfaces inclined at about 450 and facing each inclined surface comprising at least one housing for partially receiving the packaged product, so that said product can be maintained by cooperation of said housing present in that inclined surface.

  According to a particular embodiment, said housing comprises an opening made by a partial cut of a wall portion of said inclined surface defining a movable flap for wedging and maintaining said product in said opening. According to another particular embodiment of the internal element, provision is made to make said inner element of a self-supporting, flexible material, such as for example paper or paperboard, which may be monolayer or multilayer, thus allowing significantly reduce the manufacturing cost of the internal element. The invention as defined above and as resulting from the description of the figures, being an integral part of the invention representing a presently preferred embodiment of the inner member and the outer member to the sheath, solves the technical problems previously stated for the purposes of the invention and allows for devices doubly self-blocking packaging, partially simple, inexpensive, usable on an industrial and commercial scale. Other objects, features and advantages of the invention will become apparent in light of the following explanatory description, with reference to a presently preferred embodiment of the invention, given merely by way of illustration and which in no way limit the scope of the inventions

  DESCRIPTION OF THE FIGURES FIG. 1 represents a plan view and in phantom of a substantially rectangular sheet, from which a substantially rectangular sheet intended to constitute an internal element according to the present invention is cut out, and according to a first embodiment of it currently preferred; FIG. 2 is a perspective view of the cut sheet and showing complementary bonds defining mibril flaps intended to constitute wedging surfaces of the products to be packaged; FIG. 3 represents the first folding step; of the inner member on an end for example distal, to form a first stiffening box - Figure 4 shows the complementary step of folding the proximal end to form on this end a second stiffening box; FIG. 5 represents a further subsequent folding step 5 of the lateral flaps such as 21, 22, 23, 24, 25, 26, 27, stiffening boxes; FIG. 6 again represents a complementary step of tilting at 90 of the stiffening boxes in a substantially vertical position; FIG. 7 represents a complementary step of folding the fastening tabs and maintaining the end caissons in a substantially vertical position, with the unexpected technical effect desired of the invention of effecting a lifting effect of the central part of the body. and other a transverse fold line located in substantially central position, to obtain walls inclined at about 45, for housing the product to be packaged; Figure 8 shows a top plan view of a sheet shown in phantom with general reference 80 for making a substantially rectangular sheet to form after folding the outer sleeve 90; - Figure 9 shows on the one hand the outer sleeve 90 in the folded state, with its inner flaps 100,102 foldable inside; and the inner member 10 in the folded state as obtained in FIG. 7 but in the inverted position, ready to be inserted inside the outer sleeve 90 with the outer flaps 30, 32 of the inner member, bearing against and fold the inner flaps 100, 102 of the outer sleeve during its insertion therein; FIG. 10 represents the step of positioning the packaged products in the housings provided for this purpose in the inner element, in the latching position respectively of the internal flaps 100, 102 and of the external flaps 30, 32; and Fig. 11 shows the inner member 10 fully retracted within the outer member or sleeve 90 with stoppers 60, 62, preventing further penetration of the inner member into the interior. scabbard.

  With reference to FIGS. 1 to 7, there is shown a presently preferred embodiment of an inner envelope according to the present invention, which is obtained from a substantially flat, rectangular sheet 1, shown in phantom: mixed, by cutting to obtain a blank of substantially rectangular shape, represented by the general reference number 10, and comprising various flaps and flaps foldable as shown in Figure 1. The inner member 10 which will be obtained from the substantially rectangular blank is, according to the preferred embodiment of the invention, after folding as indicated below of a final shape, in the folded state, substantially parallelepiped. As can be seen from the pre-cut sheet or blank 10, it has a substantially rectangular shape comprising two parallel longitudinal edges 12, 14, and two transverse edges, a proximal transversal edge 16 and a distal transverse edge 18. When of cutting the initial sheet, which can itself be obtained by cutting from a continuous roll, as is well known to those skilled in the art, it is intended to make appropriate cuts defining side flaps on the one hand proximal, such as 20, 21, 22, 23 on the proximal side and corresponding lateral flaps such as 24, 26; 25, 27 on the distal side; at least one outer flap, preferably two outer flaps 30, 32, as shown in Figure 1, on each longitudinal lateral side 12, 14 and which are intended, as explained below, to form a first stop preventing the exit complete the inner element 10 once it has crossed the flap (100, 102) of the outer member or sleeve 90 which will be described later, is initially provided, in the context of the presently preferred embodiment, shown in FIGS. 1 to 7, solitlarization tabs 40, 42, 41 and 43, respectively, when the internal device is being devel- oped, transverse fold lines represented in dashed lines, such as L1, are provided, L2, L3, L4, L5, L6, L7, L8, L9, L10, L11, LU and L13. As those skilled in the art will readily appreciate, these transverse fold lines are made at a predetermined distance from the transverse edge 16 or 18 of the inner member, separated from each other by a predetermined distance to define the desired shape. of the inner member, which is preferably a substantially parallelepipedic shape in the folded state, with a first stiffening box at the proximal end P and a second stiffening box at the second distal end D, as shown in FIGS. and 10.

  According to a particular embodiment, the inner element 10 is provided with the side (here P) opposite to the side (here D) comprising the outer flap (30, 32), of at least one means 60, 62, forming an abutment. stopping insertion of the inner member 10 inside the sleeve 90. According to another particular embodiment, certain fold lines (L7, L21, L22, L23, L24, L29, L30, L31, L32) of the sheet intended to form the inner member 10 are provided to enable substantially in the vicinity of each end (P, L) of the inner member (10), in mounted position, at least one, and preferably two, inclined transverse surfaces F7, F8, at approximately 45 and facing each inclined surface F7, F8, comprising at least one housing (01, 02, 03, 04) for partially receiving the packaged product (pl, p2), so that said product can be firmly held by cooperation of said housings present in each incl surface ine (see Figs 10 and 11).

  According to another advantageous characteristic, this device is characterized in that said housing comprises at least one opening (01, 02, 03, 04) made by a partial cut of a wall portion of said inclined surface (F7, F8) defining a movable flap (such as V3 and V4) for setting and holding said product (p1; p2) in said opening.

  The manufacturing procedure of the inner element, from the blank obtained in Figure 2, is particularly simple and is understandable for those skilled in the art starting from the mere consideration of Figures 1 to. 7. The latter is simplified as follows: a) the first folding is performed according to the fold lines L1, L2, L3, L4, from the transverse edge 16, with folding towards the other transverse side .8, to obtain the formation of the proximal end P clearly visible in Figure 3; b) after forming the proximal end P, the next step which is shown in Figure 4, is to fold on the other side from the edge 18, according to the fold lines L13, L12, L11, L10, to form the distal end D; c) the next step is to fold the flaps respectively 21, 23, 22, 24; 25, 27; 26, 28, engraves at particular fold lines L16 to L28, as shown in FIG. 5; d) the next step shown in FIG. 6 consists in tilting 90 inwards towards the line L7, the respectively P and distal D proximal ends, to form a shape with a substantially parallelepiped profile, clearly visible at Figure 6; E) FIG. 7 represents the last step of folding along the fold line L7, which is obtained by inserting the fastening tabs 41, 43 and 40, 42 inside the end boxes with folding ends thanks to particular folding lines L29, L30, L31, L32, intended to constitute respectively the proximal end P and the distal end D, as can be seen in FIGS. 6 and 7, By turning over the inner element 10 thus finalized, FIG. 9 shows the position ready for insertion. Moreover, the external element or sleeve 90 is manufactured. As can be seen from FIG. 8, the external element 90 is obtained from FIG. a sheet 80 shown in phantom, which is cut to the required size with formation of fold lines such as L'1, L'2, L'4, transverse and folding lines on parts of the longitudinal edge, L ' 5, The 6. Cutting defines a scissorsheet 90 having longitudinal edges 92, 94 and transverse edges 96, 98; as well as internal flaps respectively 100, 102. It is understood that similarly to the manufacture of the inner member shown in Figures 1 to 7, the outer member 90 is obtained by folding on the folding lines L`1, L 2, L`3 and U4, to define the substantially parallelepipedal shape shown in Figure 9, Obviously, the sheet 90 comprises a transverse band 104 of solidarity, also clearly visible in Figure 9 and which allows to permanently secure the opposite edges 96, 98 of the sheet 90, by any suitable fastening means, such as gluing, heat-sealing, etc.

  According to a particular embodiment of the invention, the sheet 90 constituting the outer member to the sheath, is made from a transparent sheet of a self-supporting material, flexible but not extensible, for example the plastic such as a material used to form a blister-like member, such as, for example, a sheet of polyethylene, polypropylene, PVC, polyester such as PET, etc., as is well known to those skilled in the art. On the other hand, the sheet 1 intended to form the inner member 10 may, according to another particular embodiment, be made of a self-supporting material, flexible, such as paper or paperboard or a plastic material such as polyethylene, polypropylene, PVC, polyester, such as PET, the latter can be monolayer or multilayer, thereby significantly reducing the manufacturing cost of the inner member.

  According to another embodiment of the invention, the internal element could also be made with a transparent sheet but, identical or different from the external element but from a manufacturing cost point of view, it is currently preferred to make the inner element from paper or paperboard.

  As is understandable from the configuration of all the figures and in particular of Figure 9, the packaging device according to the present invention comprises the combination of the one hand, the outer casing 90 and 90 on the other hand, of the inner element 10. When the fastening takes place by insertion of the inner element 10, by its distal end D on the side of the sleeve 90 comprising the internal flaps 100, 102, as represented in FIG. 9, the insertion of the inner member 10 is easy, the outer flaps 30, 32 of the inner member 10 to slide and completely fold the inner flaps 100, 102 of the sleeve 90. Those skilled in the art will readily understand that. when the outer flaps 30, 32 of the inner member 10 are free from the holster 90, any withdrawal movement, as shown in Fig. 10, prohibits removal or withdrawal completely. the inner member 10 of the sheath 90, forming here a first self-locking security sought.

  It is thus understood that once the package has been manufactured, the inner element can be completely inserted inside the sheath 90 while being stopped in its insertion by the presence of at least one stopper means. insertion stop respectively 60, 62, clearly visible in Figures 1 to 11, in particular stop stop position when the inner member is completely inserted into the sleeve 90, as shown in Figure 11. Thus, the user , to achieve the packaging, will have to leave the inner member substantially completely of the sleeve 90, by a withdrawal movement which will be stopped by the snap of the inner flaps 100,102 of the sleeve 90 with the outer flaps 30, 32 of the element internal 10, as shown in Figure 10. In this safe and reliable self-locking position, it is easy for the user to position the products such as PI, P2, in the housing, defined by the combination of openings 01, 0 2, 03, 04 present in the inclined faces F7, F8 defined in the inner element 10.

  Thanks to the presence of these inclined faces F7, F8, the products to be packaged P1, P2 can be introduced slightly by force, so as to lock them in position in a safe and reliable manner, this blocking being aided by the presence of the flaps V3, V4 formed by the cuts C3, C4, and which constitute abutments stop and hold the products pl, p2.

  Thus, these products are securely maintained in place through this system. The end of the packaging procedure is shown in FIG. 11 and consists in pushing the inner element 10 inside the sheath 90, until the insertion stop stop means 60, 62, abut against the corresponding edge 94 of the element external to the sheath 90. It is understood that the casing external envelope 90 comprises two open lateral ends respectively 106, 108, respectively said proximal end 106 and distal end 108, allowing the insertion an inner member 10 comprising at least one housing comprising the eei! Liiit: ries Li2, e-13, 04, desui-lee contain and present one or more products pl, p2, such as for example a bottle of alcohol or a cosmetic bottle, and this with a doubly self-locking effect, respectively vis-à-vis the complete extraction of the inner member 10 of the outer member sheath 90, once the inner member has been inserted inside of it ; and secondly, vis-à-vis the insertion too advanced the inner member 10, inside the outer member or sleeve 90. Thus, the sleeve (90) has a substantially parallelepiped shape, comprising an upper face, a lower face, two longitudinal side faces and two transverse lateral faces; and, correspondingly, the inner member (10) also has a substantially parallelepiped shape comprising an upper face, a lower face, two so-called longitudinal side faces and two lateral faces said transverse.

  The invention therefore makes it possible to obtain a device forming self-locking packaging, preferably doubly self-locking. The invention obviously includes all the means constituting equivalents described and shown in the drawings, and their various combinations resulting from the preceding complete description, supplemented by Figures 1 to 11 which form an integral part of the invention.

Claims (16)

  A self-locking packaging device, preferably doubly self-locking, comprising on the one hand an outer casing or sheath (90), comprising two open lateral ends (106, 108), respectively called proximal end (P ') and distal end ( D '), allowing the insertion of an inner member (10) comprising at least one housing (01, 02, 03, 04) for containing and presenting one or more products (pl, p2), for example a bottle of alcohol or a cosmetic bottle a candle or any object of cylindrical, conical, square or parallelepiped shape, and characterized in that a) the outer casing or sheath (90) comprises on one side at least one internal flap (100, 102), preferably at least two internal flaps obtained by folding at least one extension of the surface of said face inside the sheath, of which at least one (100, 102) is disposed in the vicinity of unedite open end (106) for the insert ion of the inner member (10) for containing said product (pl, p2), each flap (100, 102) of the sleeve being arranged to have its free edge oriented towards the other open end (108), in such a manner as to fold substantially completely upon insertion of said inner member (10) from the outside, and to form a first stopping abutment preventing complete exit of the inner member once it has passed said flap (100). , 102); and b) said inner member (10) for supporting said product (s) comprises, on an external face facing the inner surface of the sheath (90) comprising the internal flap (100, 102), at least one flap outer (30, 32), preferably at least two outer flaps, obtained by folding at least one, preferably at least two, extensions) of said outer surface towards the flap (100, 102) of the sheath , so as to provide a second locking abutment by self-locking effect of the flap respectively internal (s) and external (s) by snapping into each other during a sliding back of the inner member outwardly the sheath, prohibiting a complete kind of it (Fig.10) .35   2. Device according to claim 1, characterized in that the or each inner flap (100, 102) of the sleeve (90) is provided substantially at the edge of an inner face of an open end (106) of the distal (D ') or proximal end (p'); and the outer flap (30, 32) of the inner member (10) is also provided substantially at an edge of an outer face, facing the inner member but facing the other end. open (108) respectively proximal or distal, so that the snap between the flaps occurs while the inner member (10) is almost completely out of the sheath, to allow the introduction of the product or products to pack (ig.10),   3. Device according to claim 1 or 2, characterized in that the sheath (90) has a substantially parallelepiped shape, comprising an upper face, a lower face, two so-called longitudinal side faces and two lateral faces said transverse; and, correspondingly, the inner member (10) also has a substantially parallelepiped shape comprising an upper face, a lower face, two longitudinal side faces and two transverse lateral faces.   4. Device according to one of claims 1 to 3, characterized in that the inner member (10) is provided with the side (here P) opposite the side (here D) comprising the outer flap (30, 32), d at least one means (60, 62) forming an insertion stop for inserting the inner element (10) inside the sheath (90).   5. Device according to one of claims 1 to 4, characterized in that the inner member (10) is formed from a sheet (1) substantially planar by appropriate cutting, in particular to define the aforementioned flaps.   6. Device according to one of claims 1 to 5, characterized in that the inner member (10) is obtained by cutting a sheet (1) substantially flat to obtain first a substantially rectangular shape and on wherein a plurality of transverse fold lines (L1-L13) are provided substantially parallel to the opposite transverse edges (16, 18), at a predetermined distance from the transverse end edge (16 or 18) of the inner member, separated from each other others a predetermined distance to define said substantially parallelepipedic shape in the folded state (Fig 7, 9).   7. Device according to one of claims 1 to 6, characterized in that certain fold lines of the sheet intended to form the inner member are provided to allow substantially to be realized in the vicinity of each end of the inner member, mounted position, at least one, and preferably two, transverse surfaces inclined at approximately 45 and facing each inclined surface comprising at least one housing for partially receiving the packaged product, so that said product can be firmly maintained by cooperation of said housings present in each inclined surface.   8. Device according to one of claims 1 to 7, characterized in that said housing comprises an opening (01, 02, 03, 04) made by a partial cut of a wall portion of said inclined surface (F7, F8 ) defining a movable flap (such as V3 and V4) for setting and maintaining said product (pl; p2) in said opening.   9. Device according to one of claims 1 to 8, characterized in that the inner member (10) is made of a self-supporting material, flexible, such as for example paper, cardboard, or a plastic material such as polyethylene, polypropylene, PVC, polyester polyester such as PET, the latter may be monolayer or multilayer.   10. Device according to one of claims 1 to 9, characterized in that the sheath (90) is also made from a sheet (80) substantially flat by appropriate cutting, and folding along a plurality of fold lines (LI, L2, L'3, L'4) substantially pu3llèles two opposite edges (96, 98) of said sheet, to define after folding said two apertures (106, 108) respectively proximal (P and distal (D, in having a substantially parallelepipedal final shape.   11. Device according to one of claims 1 to 10, characterized in that the sleeve (90) is obtained from a transparent sheet made of a self-supporting material, flexible but not extensible, for example plastic such as a material used to forming a blister-type element such as a sheet of polyethylene, polypropylene, PVC, polyester such as PET.   12. Internal element as defined in any one of claims 1 to 11.   13. A method of manufacturing the inner member as defined in claim 12 or any one of claims 1 to 11, characterized in that it comprises a) the provision of a substantially planar sheet (1) having longitudinal and transverse external edges (16, 18); b) cutting said sheet (1) into a substantially rectangular shape and with formation at least on each longitudinal outer edge (12,   14) at least one outer flap (30, 32) for forming a stopper; C) providing a plurality of transverse fold lines substantially parallel to said transverse edges, with appropriate conformation tools; separated from each other by a predetermined distance to define a substantially parallelepiped shape in the folded state; this step of forming the fold lines can be carried out concomitantly with the cutting state or independently of it; d) folding said single sheet into said transverse fold lines to form said inner member having folded state, substantially parallelepiped shape. 14. A method according to claim 1, characterized in that: fold lines (such as t.7) of the iron lie (1) for forming the inner member (10) are provided to enable substantially in the vicinity of each end of the inner member, in the mounted position, at least one, and preferably two inclined surfaces (F7, F8) at about 450 and facing one another, each inclined surface comprising at least one housing for receiving in part the packaged product, such that said product can be maintained by cooperation of said housings present in that inclined surface.   15. The method of claim 13 or 14, characterized in that said housing comprises an opening made by a partial cut of a wall portion of said inclined surface defining a movable flap for wedging and maintaining said product in said opening.   16. Method according to one of claims 13 to 15 characterized in that it is provided to make said inner member of a self-supporting material, flexible, such as paper or paperboard, the latter may be monolayer or multilayer. 20 25 0