WO1998001351A1

WO1998001351A1 - Blank for producing a package with nesting lid

Info

Publication number: WO1998001351A1
Application number: PCT/FR1997/000695
Authority: WO
Inventors: Yves Delaunay; Edgard Schroyens
Original assignee: Groupe Danone
Priority date: 1996-07-03
Filing date: 1997-04-17
Publication date: 1998-01-15
Also published as: FR2750672B3; FR2750672A1; ES2208896T3; DE69726420T2; EP0904235B1; AU2703397A; DE69726420D1; EP0904235A1

Abstract

The invention discloses a package in sheet material, such as cardboard or the like with a lid capable of being nested onto a separate lid body. It is made from a single blank of the said material, cut out and grooved to provide an opening means which defines in the package - after the latter has been initially opened - a body (30) and a covering lid (31) and at the package portion constituting the said body (30) are associated means (36, 37) for deforming it so as to reduce the perimeter of its opening (35) so that it can be closed by the covering lid (31) being nested onto it.

Description

BLANK FOR THE PRODUCTION OF A PACKAGE WITH A LID

The invention relates to a blank intended for producing a packaging made of cardboard or material having mechanical characteristics similar to those of cardboard, in particular a packaging with an interlocking closure cover.

We already know, in many embodiments, cardboard packaging or similar material with an interlocking closure cover, sometimes designated in the art as "telescope" type packaging and which include, as indicated for example in FR-A -2 486 912, a parallelepiped body and a cover of identical shape but of dimensions slightly larger than those of the body, for covering the latter, the cover and the body being produced in two separate and distinct blanks of sheet material. If packages of this type are satisfactory, they nevertheless have the disadvantage of requiring two assembly operations, one for the body and the other for the cover, on the one hand, and, on the other hand, require auxiliary means, such as pieces of adhesive tape, if you want to temporarily secure the body and the cover. It is, in general, an object of the invention to provide a blank intended for a packaging made of cardboard or similar material, in particular with an interlocking closure cover, and which allows easier assembly.

It is also an object of the invention to provide such packaging capable of being produced economically, on the one hand, and suitable for being mounted on automatic machines well suited to packaging installations with a high operating rate. , on the other hand. It is also an object of the invention to provide such packaging of the "tamper-evident witness" type, that is to say a package, the first opening of which cannot then be concealed or hidden.

It is also an object of the invention to provide such packaging in which a first opening, which is extremely simple to perform, separates said packaging into a box body and a styling cover, without creating or revealing on the cover fitting groove body.

It is, finally, an object of the invention to provide such packaging, in particular a cardboard box or similar material, capable of being very easily closed, - after opening and removing part of its contents -, for thus contribute to the conservation of said content. A packaging made of sheet material, such as cardboard or the like, meeting at least one of the aforementioned aims, is produced according to the invention from a single blank of said material, cut and possibly creased, this blank being characterized in that 'it comprises: - a first and a second panel constituting a first pair of opposite lateral walls of the packaging a third and a fourth panel constituting a second pair of opposite lateral walls of the packaging a first flap forming a bottom of the packaging, and which is articulated to the third panel along a first line of articulation a second flap articulated to the fourth panel along a second line of articulation

- And, on either side of the first flap, a first and a second series of intermediate flaps of smaller area than the first flap and which are articulated to the first and to the second panel along a third and a fourth line of articulation which are located in the extension of said first and second lines of articulation when the blank is placed flat.

The blank can be characterized in that it includes: - a third component articulated to a third panel along a fifth line of articulation opposite to said first line of articulation

- A fourth component hinges on the fourth panel along a sixth line of articulation opposite said second line of articulation

- And, on either side of the third flap, a third and a fourth series of vo ets of smaller surface area than the third flap and which are articulated to the first and to the second panel along a seventh and d 'an eighth line of articulation, which are located in the extension of the fifth and sixth lines of articulation.

It may comprise an opening means which defines in the packaging, - after a first opening of the latter -, a body and a covering cover and in that the part of the packaging constituting said body are associated with means making it possible to deform it so as to reduce the perimeter of its opening so that it can be closed by fitting the styling cover over it.

According to another characteristic of the invention, the first opening means is a pre-cut strip over substantially the entire side wall of the packaging and which is preferably provided with a gripping tab making it possible to facilitate its tearing off.

According to another characteristic of the invention, the means associated with the body for the deformation of the perimeter of its opening edge are constituted by at least one line of ramage formed on the side wall of the body, advantageously by one or non-traversing αecoupeis (s) in the thickness of the blank constituting the packaging.

In a preferred embodiment, the packaging has a cylindrical lateral surface, - in the general sense of this term -, and at least one of said rowing lines is oblique to the direction of the generatrices of the cylinder.

In an alternative embodiment, the row (s) of rowing is (are) parallel (s) to said generators.

The invention also relates to a method for producing a packaging from a blank as defined above, and comprising the following steps: a_) forming from the blank a case set in volume b) folding substantially at an angle at least one intermediate flap of the first and / or second series c) fold the first flap substantially at right angles, the latter coming into contact with at least one said intermediate flap folded during step bd) substantially fold a right angle the intermediate flaps not yet folded to stick them on the first glued regions of the external face of the first folded flap e) fold the second flap substantially at right angles to fold it over second glued regions of the folded intermediate flaps and / or the external face of the first flap. The process can be characterized in that it includes, after step e, or between steps a and b, a step f_ of inserting a product in the case.

It can be characterized in that it also comprises the following steps: α) fold substantially at right angles an intermediate flap of the third and / or the fourth series h_) fold the third flap substantially at right angles, the latter coming into contact with at least one said folded intermediate flap ι_) fold substantially at an angle the non-folded intermediate flaps of the third and / or fourth group to stick them on first glued regions of the external face of the third flap

) fold the fourth flap substantially at right angles to fold it over the second glued regions of the folded intermediate flaps of the third and / or fourth group, and / or of the external face of the third flap.

Other characteristics and advantages of the invention will emerge from the description which follows, given by way of example and with reference to the accompanying drawings in which: FIG. 1 is a schematic perspective view of a package according to the invention before first opening; Figure 2 illustrates, in exploded perspective, the body and the covering cap of a package according to Figure 1 after first opening thereof;

- Figure 3 is a perspective view, from the inside, of the styling cover;

- Figure 4 is a flat view of a blank of material, such as cardboard or material having mechanical characteristics similar to those of cardboard, from which can be made the package 1 according to the invention;

- Figure 5 is a flat view of a preferred embodiment of the blank according to the invention, and Figure 6 shows said folded blank.

In the embodiment described and shown, the packaging made of sheet material, such as cardboard or material having mechanical characteristics analogous to those of the carton, with a cover with a snap closure is a box 10 intended for the packaging of food products such as biscuits B, without this indication having, however, any limiting nature whatsoever. The package 10, Figure 1, comprises a cylindrical side wall 11, and two parallel end faces whose outline, as shown for the face 12, is centrally symmetrical around a point O with two curved parts 13, 14 joined together by rectilinear parts 15 and 16, respectively, so that the side wall 11 has two curved faces and two flat faces 20 and 21 which allow these packaging boxes to be joined together for their transport and presentation on sale.

The packaging box 10, - produced as will be explained below from a single blank 25 of sheet material such as cardboard or the like -, comprises means 26 for first opening which, when they are made operational , separate said packaging into a box body properly has 30 and a covering cover 31. In the embodiment described and represented the means 26 are housed by a strip 32 cut in the blank 25, between its edges 27, 28 (FIG. 4) and which is provided with a gripping tab 33 which, when pulled by the user α in the direction of the arrow f_, causes the strip to be torn over the entire side wall 11 of the packaging without it appears on the body 30 or the throat or rim cover 31 of the type of those known, for example, in cardboard boxes of cigarette packets. With the easy tearing-off, and as a result of the easy opening of the box, contributes to the fact that for a cardboard blank 25 the direction of the fibers thereof is chosen to obtain a sharp tear along the precut edges from bank 32. The packaging box which has just been described, and which is mainly intended to enclose a content whose volume can decrease by successive withdrawals, such as cookies, on the one hand, and which one wishes to be able to keep while having the possibility of closing it, on the other hand, comprises means intended precisely to allow this reclosing by fitting the covering cover 31 onto the body 30. More precisely, said means are arranged so that a slight pressure in the preferred areas of the body causes a reduction in the perimeter of the opening 35 of the latter and, in the embodiment described and shown, said means are constituted by rowing lines 36, 37 and 38, 39 formed by non-through cuts in the thickness of the planar faces 20 and 21, respectively, of the side wall of the packaging box; as can be seen in FIGS. 2 and 4, said row lines 36-39 are directed obliquely with respect to the generatrices of the side wall, by forming inverted V's whose points 40 and 41, respectively, are in the vicinity of the opening 35 body 30.

As a variant, a single ra line directed parallel to the generatrices of the side wall is provided substantially in the middle of the planar faces 20 and 21.

In yet another variant, the ra lines as 36-39 are parallel to each other and parallel to the generatrices of the side wall of one package. Whatever the embodiment of the means making it possible to easily deform the body 30, the box according to the invention can be closed, - after part of its contents have been removed -, by deforming the opening 35 of said body by light pressure on it (taking advantage of the slight play between the body and its contents) to bring the opening part of the body in the condition shown in solid lines in FIG. 2 in which its opening perimeter is reduced relative to that of the perimeter with the covering cover 31, so that the latter can be easily placed on the body, as suggested by arrow E in this figure.

A packaging box according to the invention thus makes it possible to package food products enclosed directly in the box or previously conditioned in an intermediate flexible sheath and this in order to guarantee that no untimely handling has been carried out on the box for as long αue the opening strip 32 is present and intact, then to easily close the box after first opening, and subsequent openings, to contribute to the conservation of the product which it encloses.

Whatever the mode of use of the e-paving, the invention provides for making it from a blank 25, FIG. 4, in one piece and which comprises, in addition to the panels 20 and 21, panels 50, 50 'and 51 constituting the side wall and a set of flaps 52 and 53 intended to form, the first, the bottom of the covering cover 21 and the second the bottom to the body of box 30. As shown in Figure 4 , the flap 50 'is used for bonding on it the panel 21, -to form a cylindrical case-, while the flaps 52 and 53, symmetrical with respect to an average transverse axis XX of the blank, serve to form the fonαs of the packaging and each include:

. a flap 60 bounded by the domed parts 13, 14 and the straight parts 15 and 16, the latter forming articulation lines on the panel 20;

. a flap 61 of cruciform appearance connects because a hinge _ιgne 62 to the panel 21; . three intermediate flaps of smaller dimension 63, 64 and 65 connected to articulation to the panel 50 around a line 66; and panels of the same shape as those mentioned last, references 67, 68, 69 connected around a line of articulation 70 to the panel 51, said flaps forming, after folding and gluing, a relatively rigid and resistant cover structure 31 , Figure 3, the flaps 53 of the blank forming a bottom of the body also rigid and resistant.

The invention is not limited, of course, to the embodiment described and shown. It finds application for packages whose cross section of the side wall is a polygon, for example rectangular or another closed curve, the height of the covering lid being advantageously, - when the contents of the package are in the form of discrete products - , at least the height of one of these products.

A preferred embodiment of the invention is shown in Figures 5 and 6.

The blank shown in Figure 5 is in one piece and has a first (7) and a second (7 ') panels constituting a first pair of side walls of the package, as well as a third (8) and a fourth (8 ') panels, possibly grooved, constituting a second pair of opposite side walls of the package. In general, it is planned to present the case to the consumer by placing it on one of the walls 8 or 8 '. It also comprises two pairs of opposite flaps, respectively (2A, 2B) and (4A, 4B), the flaps 2A, 2B, and possibly the flaps 4A, 4B being, like the flap 60 previously described, delimited by two curved parts 13 ', 14' and straight parts 15 'and 16', the latter forming a line of articulation with the panel 8 ', and possibly the panel 8. Whatever their shape, the flaps 4A and 4B are folded down around a hinge line 71 located in the extension of line 16 ', when the blank is placed flat (Figure 5).

The panels 7 and 7 'also have, preferably on both the A side and the B side, intermediate flaps or tabs referenced 1A, 3A and / or 1B, 3B and which are articulated to these panels 7 and 7' around lines 72 and 72 'located in the extension of the articulation line 16', when the blank is placed flat (Figure 5).

The case 70 may have an opening strip 32. In the example shown, two flaps 1 of trapezoidal shape frame three flaps 3 also of trapezoidal shape. These shutters 1A, 3A, 1B, 3B have a surface which is considerably smaller than that of the shutters 2A, 2B which they border. However, their shapes and dimensions can be any provided that they are compatible with the process of shaping the packaging in the form of a case, as will be described below: The case 70 arrives flat from the printer being already folded along the generator 6, and glued to the bonding tab 5, as shown in FIG. 6.

The case 70 is inserted in a stack in a so-called cartoner machine. This machine will first of all, conventionally, unstack the case 70 and bring it into position to be shaped.

The case 70 is then set in volume, by any conventional method of setting in volume. The A side is closed first. This closing takes place as follows:

- folding of the four legs 1A, which will serve as a counterpart when the flap 2A is folded over the legs 1A,

- folding of the flap 2A on the four legs 1A, - removal of two lines of glue 18A on the outer face of the flap 2A. Following the removal of the glue, the legs 3A are folded and glued to the flap 2A,

- depositing adhesive 18 'A on the legs 3A, - finally, folding the flap 4A on the legs 3A.

Following the removal of glue 18 'A, the flap 4A is glued on the legs 3A.

Then, a bag of cookies, for example, is inserted into the case by the B side of the package. Once the pouch is inserted, we close the B side of the package in the same way as we closed the A side.

Alternatively, the pouch can be inserted into the case before closing the A side, that is to say after the volume of the case. We obtain an optimal quality of shaping of the semi-oval part of the package, because the number and size of the legs allow a good adequacy of the sides of the package to the rounded area of its end. In practice, it is possible to use at least two tabs 3A for each of the panels 7 and 7 '. It is advantageous to use as many 3A legs as possible. The implementation is in fact all the more suitable as the number of the legs 3A is more eieve, but also that the size of the legs 1A is smaller. The method according to the invention can be implemented on only one of the two sides (A or B) αe the case 70, or as shown, both on the sides A and B

It is however in the latter case that the mechanical resistance of the case is optimal, and allows the rounded shape of one case to be maintained in the best conditions during the use of the product.

The glue lines 18A, 18A ', 18B and / or 18' B can be replaced by glue dots. The lines (or points) of glue 18A, 18A ',

18B, 18 'B can be arranged on the external face of the corresponding flap 4A and / or 4B and / or on the corresponding tabs 3A and / or 3B.

It is also possible that the glued regions, in particular of the external face of the first 2A and / or of the second flap 2B, are produced in advance.

In the example shown, the tabs 1A and / or IB which serve as a counterpart to the folding down of the flaps 2A and / or 2B, are preferably end tabs which are adjacent to the straight edges 15 ′ and 16 ′ of the flaps 2A and / or 2B. Alternatively, it is possible to perform this function using any of the tabs 3A and / or 3B.

Claims

1. Blank intended for the realization of a packaging in sheet material like cardboard or similar material, said blank being in one piece, characterized in that it comprises:

- a first (7 ′, 50) and a second (7,51) panels constituting a first pair of opposite side walls of the packaging

- a third (20.8 ') and a fourth (21.8) panels constituting a second pair of opposite side walls of the package

- a first flap (2A, 60) forming a bottom of the packaging, and which is articulated to the third (20.8 ') panel along a first line of articulation (16.16') a second flap ( 4A, 61) articulated to the fourth panel (21,8) along a second line of articulation (62,71)

- And, on either side of the first flap (2A, 60), a first and a second series of intermediate flaps (1A, 3A, 63, 6, 65, 67, 68, 69) of smaller area than the first flap (2A, 60) and which are articulated to the first (7 ', 50) and to the second (7.51) panel along a third (66.72') and a fourth (70.72) hinge line which are located in the extension of said first (16,16 ') and second (62,71) hinge lines when the blank is placed flat.

2. Blank according to claim 1, characterized in that the third (20.8 ') and the fourth (21.8) panel have crease lines (36-39) directed obliquely relative to the generators of side wall.

3. Blank according to claim 2, characterized in that the crease lines (36-39) form V overturned whose points (40,41) are in the vicinity of an opening of the body (30).

4. Blank according to one of the preceding claims, characterized in that it has an opening strip (32).

5. Blank according to one of the preceding claims, characterized in that it comprises: a third flap (60, 2B) articulated to the third panel (20.8 ') along a fifth line of articulation (16') opposite at said first line of articulation (16, 16 *) a fourth flap (61, 4B) articulated to the fourth panel (21, 8) along a sixth line of articulation (71) opposite said second line of joint (62.71)

- And, on either side of the third flap (53, 2B), a third and a fourth series of intermediate flaps (1B, 3B) of smaller area than the third flap (53, 2B) and which are articulated to the first (7 ', 50) and second (7.51) panel along a seventh and an eighth line of articulation, which are located in the extension of said fifth (72') and sixth (72) lines of articulation.

6. Blank according to one of the preceding claims, characterized in that at least one flap has opposite curvilinear surfaces (13,14) giving the first (7 ', 50) and the second (7,51) panel at least one shape partially curved when the packaging is formed.

7. Blank according to one of the preceding claims, characterized in that at least one said series of intermediate flaps (1A, 3A, IB, 3B) comprises at least one intermediate end flap (1A, 1B) which is immediately adjacent to one end of the first (2A, 60) and / or the second (4A, 61) and / or the third (53, 2B) and / or the fourth flap (4B) when the packaging is set in volume and the first flap (2A, 60) is folded.

8. Method for producing a packaging from a blank according to one of the preceding claims, characterized in that it comprises the following steps: a_) forming from the blank a case set in volume b) folding substantially at right angles at least one intermediate flap (1A, 3A) of the first and / or of the second series c) fold the first flap (2A, 60) substantially at right angles, the latter coming into contact with at least one said intermediate flap ( 1A) folded during step bd) fold the not yet folded intermediate flaps (3A) substantially at right angles to glue them onto the first regions (18A) bonded to the external face of the first folded (2A, 60) folded e_) fold the second flap (4A, 61) substantially at right angles to fold it over second glued regions of the folded intermediate flaps (1A.3A) and / or of the external face of the first flap (2A, 60).

9. Method according to claim 8, characterized in that it comprises, after step e_, or between steps a_ and b, a step f_ of inserting a product in the case.

10. Method according to claim 9, characterized in that it comprises the following additional steps:) fold substantially at right angles an intermediate flap (1B, 3B) of the third and / or fourth series h) fold substantially at an angle right the third flap (53, 2B), the latter coming into contact with at least one said folded intermediate flap (IB) _ι) fold substantially at right angles the intermediate flaps not yet folded (3B) of the third and / or of the fourth group to stick them on the first regions (18B) glued to the external face of the third folded flap (53, 2B) ι_) fold substantially at right angles the fourth flap (4B) to fold it over the second glued regions of the flaps folded intermediates (1B, 3B) of the third and / or fourth group, and / or of the external face of the third flap (53, 2B).

11. Method according to one of claims 8 to 10, characterized in that the first glued regions

(18A, 18B) are carried out between steps c and d and / or between steps h and α ..

12. Method according to one of claims 8 to 11, characterized in that at least one intermediate flap folded during step b and / or step g_, is a said end flap (1A, 1B).