FR2691432A1 - Box with polygonal section in a sheet and blank material for producing such a box. - Google Patents

Abstract

- Box from sheet material and blank for manufacturing it. - According to the invention: . the lateral edges (17) of the said outer lid flaps (11.1, 11.3) include notches (21), a part (22) of the contour of which is rectilinear and at least approximately coincident with the third corresponding fold line (13.1, 13.3); and . the lateral edges (17) of the said inner lid flaps (11.2, 11.4) include lateral protuberances (23), corresponding to the said notches (21) and penetrating into the latter in order to bear on the said rectilinear part (22) of the contour of the said notches (21). - Production of a lid which is resistant to being pushed in.

Description

The present invention relates to a box of cardboard, corrugated cardboard or

  of similar sheet material, having a polygonal section, and in particular with a rectangular general section, and a blank of such a sheet material for producing said box. It is known that the single blank from which such boxes are formed comprises a series of flaps connected to each other by parallel fold lines and provided laterally with flaps, respectively connected to said flaps by fold lines perpendicular to the fold lines. connecting said flaps together and intended to form the bottom and the lid of said boxes The free edge of a

  extreme parts of the assembly are provided with a

  watch connected to said extreme shutter by a folding line

  parallel to those connecting said flaps and intended to be fixed against the free edge of the opposite end flap.

  Known cases of this type are called "American" and

  they have a generally rectangular section (transverse to said flaps). As a result, all flaps and flaps are also square or rectangular in shape, all the flaps being transverse to each other.

  fold lines connecting them to the shutters, the same width chosen to be at least approximately equal to half the width of the section of

checkout.

  In order to manufacture these known American boxes from said blank, said blank is folded onto itself and said tongue is fixed on the opposite end flap. Then, the bottom of the box is formed by folding and fixing (gluing) said bottom flaps. checkout is ready

to receive its content.

  After placing the contents in the box, the lid is formed by folding and fixing said

lid flaps.

  It will be noted that, at the time of forming the lid, pressure is exerted on said lid flaps in the direction of the interior of the box, the contents of the box serving as an abutment. Consequently, if the contents of the box is not sufficiently rigid or does not have sufficient volume to occupy the entire volume of the body, the flaps of the lid are pressed inside the body This results in a crate whose lid is poorly formed and whose presentation To avoid this drawback, we therefore tend to provide boxes adapted to the fairest content However, in this case, there is a risk, on the one hand to deteriorate the contents of the box at the time of formation of the lid and , other

  on the other hand, to provide just too much, so that the lid can not close completely and is in a curved shape.

  The object of the present invention is to remedy these drawbacks. It concerns a box whose lid is able, by itself, to withstand the depression and in particular to absorb the pressure forming the lid. As a result, it is possible to use crates that spaciously pack their contents, without the risk of sinking their lids or deteriorating their contents when

forming said lids.

  For this purpose, according to the invention, the body of material in

  sheet, such as cardboard or corrugated cardboard, comprising: side faces interconnected by means of

  diary of the first parallel fold lines; a bottom consisting of flaps respectively connected to said

  lateral faces by second orthogonal fold lines

  nales to said first fold lines; and a lid consisting of inner flaps and outer flaps, said flaps being respectively connected to said side faces by third fold lines orthogonal to said first fold lines and each inner flap being integral with a side face

  lying between two lateral faces to each of which

  the is connected an outer flap; is remarkable in that: the side edges of said lid outer flaps comprise indentations, a part of the contour is rectilinear and at least approximately coincident with the corresponding third fold line; and the side edges of said lid inner flaps comprise lateral protuberances, in correspondence with said notches and penetrating into the latter to bear on said rectilinear portion of the contour

said indentations.

  Thus, the lid of the box according to the invention resists penetration and, in particular during the formation of the cover, the pressure on the lid flaps is absorbed by the cooperation of said lateral protrusions with the straight portions of the contour of the notches The inner flaps to be folded first, their folding

  is possible because the lateral protrusions can freely move in rotation in the indentations of the adjacent outer flaps, not yet folded.

  The contour of said notches, except for said rectilinear part, can be circular.

  The indentations and the lateral protuberances could extend over all of the lateral edges of said outer and inner flaps of the lid. However, it is often sufficient for them to extend only

said edges.

  For the realization of the body according to the present invention, there is provided a blank of sheet material, such as cardboard or corrugated cardboard, comprising: a series of rectangular or square shutters connected the

  to each other by first parallel fold lines

  the; a first set of side flaps arranged on one side of said sequence of flaps, connected thereto by second fold lines perpendicular to said first fold lines and intended to form the bottom of said box; and a second set of side flaps disposed on the other side of said flap sequence, connected thereto by third fold lines perpendicular to said flaps

  first folding lines and intended to form the cover

  key of said box, said second set of side flaps having inner flaps to form the inner portion of said bottom and outer flaps to form the outer portion of said bottom; is remarkable in that: the side edges of said lid outer flaps comprise indentations, a part of the contour is rectilinear and at least approximately coincident with the corresponding third fold line; and the side edges of said lid inner flaps have corresponding lateral protrusions

  with said indentations, said lateral protuberances

  being able to penetrate the said samples

  res. The figures of the annexed drawing will make clear how

  In these figures, the invention may be embodied

  Identical references designate similar elements.

  FIG. 1 is a perspective view illustrating the formation of

  cover of a known American box. Figure 2 shows, flat, a blank of cardboard for the

  realization of the American fund known from Figure 1.

  FIG. 3 is a perspective view, similar to FIG. 1, illustrating the lid flaps of the compliant box.

to the present invention.

  Figure 4 shows, flat, a blank of cardboard for the

  realization of the body according to the present invention.

  Figures 5 and 6 illustrate two stages in the formation of the

  cover of the body according to the present invention.

  The known American box B, shown in FIG. 1, is parallelepipedal with a rectangular section.

  To realize the box B, it is known to start from the blank F,

shown in Figure 2.

  Said blank of sheet material, for example of cardboard or corrugated cardboard, shown in FIG. 2 comprises a series of four aligned louvers 1, 2, 3 and 4, two by two connected by preformed and parallel fold lines 5 , 6 and 7. These parallel fold lines 5, 6 and 7 are respectively disposed between the flaps 1 and 2, 2 and 3, and 3 and 4.25 along the free edge of the end flap 4 of said flap assembly 1 to 4 is arranged a tongue 8, connected to said

  end flap 4 by a fold line 9, parallel to the fold lines 5, 6 and 7.

  Furthermore, on each side of each flap 1 to 4, flaps 10 1, 10 2, 10 3, 10 4 and 11 1, 11 2, 11 3, 11 4 are provided. Each side flap 10 1 to 10 4 is articulated to the corresponding flap 1 to 4 by a preformed fold line 12 1 to 12 4 The fold lines 12 1 to 12 4 are aligned and perpendicular to the fold lines 5, 6 and 7 Similarly,

  each lateral flap 11 1 to 11 4 is hinged to the corresponding flap 1 to 4 by a preformed fold line 13 1 to 13 4. The fold lines 13 1 to 13 4 are aligned and perpendicular to the fold lines 5, 6 and 7.

  Slots 14, arranged respectively opposite the lines

  5, 6 and 7, can separate each of the flaps 10.1 to 10 4 of the previous or next flap and delimit the side edges 15 facing said flaps 10 1 to 10 4.

  Similarly, slots 16, respectively disposed opposite the fold lines 5, 6 and 7, can separate the

  flaps 11 1 to 11 4 from each other and define the lateral edges facing 17 of said flaps 11 1 to 11 4.

  All flaps 1 to 4 and flaps 10 1 to 10 4 and 11 1 to

  11 4 are at least substantially rectangular, the flaps 1 and 3, on the one hand, and 2 and 4, on the other hand, being identical.

  In addition, the flaps 10 1, 10 3, 11 1 and 11 3 are identical. The same applies to the flaps 10 2, 10 4, 11 2 and 11 4. The length of each of the flaps 10 1 to 10 4 and 11 1 to 11 4.25 parallel to the preformed fold line 12 1 to 12 4 or 13.1 to 13 4 corresponding, is slightly smaller than the corresponding dimension of the flap to which is connected said

  flap, especially because of the presence of the slots 14 and 16.

  In order to produce the body B of FIG. 1 in a known manner from the blank F, at least one line of adhesive is applied to the tongue 8 of the latter (or to the shutter 1 along its free edge 18). 19, then folds said blank F around at least the fold line 6 and fixes said tongue

  8 on the flap 1, in the vicinity of said free edge 18.

  A blank (not shown) of the box B is thus obtained, with the flaps 10 1 to 10 4 and 11 1 to 11 4 extending the flaps 1 to 4 outwards. Then, the bottom is formed by folding around the lines. bending 12 1 to 12 4,

  flaps 10 1 to 10 4 that are fixed to each other, for example by gluing.

  For example, the two small flaps 10 2 and 10 4 are arranged on the inside of the box, while the two large flaps 10 1 and 10 3 are external and cover, to

  both of them, the whole of the bottom surface of said box.

  After filling the box with the objects it must contain, the lid is formed by folding the flaps 11.1 to 11 4 around the fold lines 13 1 to 13 4, then fixing said flaps together. For example, both

  small flaps 11 2 and 11 4 are internal, while the two large flaps 11 1 and 11 3 are external and cover20 to two two the entire surface of the lid of the box.

  As illustrated for the flap 11 4 in Fig. 1, since the inner flaps 11 2 and 11 4 have a length slightly less than the corresponding dimension of the flaps 2 and 4 to which said flaps are connected, these inner flaps are arranged In consequence, if the contents of the box B do not occupy therein a sufficient volume or do not offer sufficient rigidity to serve as support for the inner flaps. 2 and 11 4, when the outer flaps 11 1 and 11 3 are folded and fixed on them, said inner flaps 11 2 and 11 4 sink inside the box under the action of the pressure compulsorily exerted

  on said flaps 11 1 to 11 4 when they are secured.

  The lid of the box can only be poorly formed and

badly secured.

  To remedy these disadvantages, as shown in Figures 3 and 4, in the box BI according to the invention, it is provided that: the side edges 17 of the outer lid flaps 11.1 and 11 3 comprise notches 21, a part 22 the contour is rectilinear and at least approximately coincident with the third folding line 13 1 or 13 3 corresponding; and the side edges 17 of the lid inner flaps 11.2 and 11 4 have lateral protuberances 23,

  correspondence with said indentations 21 and

  to enter these to apply

  against the rectilinear parts 22 of the indentations 21.

  In the embodiment shown in FIGS. 3 to 6, the indentations 21 and the protuberances 23 do not extend

  on a portion of the side edges 17 of the corresponding flaps 11 1, 11 3 or 11 2, 11 4 and the outline of the samples.

  Cracks 21, with the exception of rectilinear portions 22, is a quarter-circle 24 at least approximately centered at the intersection of the corresponding lateral edge 17 and fold line 13 or 13.

  Before forming the lid, the different flaps 11 1 to 11.4 are in a position similar to that shown in FIG. 3, said flaps being at least

  approximately in the respective extension of the faces 130 to 4.

  To close the lid, the inner flaps 11 2 and 11.4 (see FIG. 5) are folded towards the inside of the box B1. During this folding, the lateral protrusions 23 of said inner flaps penetrate into the notches 21 of the flaps. At the end of folding, said lateral protuberances 23 are in abutment against the rectilinear portions 22 of the indentations 21. Then, the outer flaps 11 1 and 11 3 are folded over.

  the inner flaps 11 2 and 11 4 (see Figure 6), and said outer flaps on said inner flaps are fixed, for example by gluing.

  Due to the support of the inner flaps 11 2 and 11 4 on the faces 1 and 3, due to the cooperation of the protrusions 23 and the rectilinear portions 22 of the indentations 21, the flaps of said lid have no tendency to sink in the interior of the box Bl under the action of the pressure exerted on the outer flaps 11 1 and 11 3 during their bonding

  on the inner flaps 11 2 and 11 4, even if the box Bl is empty.

Claims (4)

  1 Box of sheet material, such as cardboard or corrugated cardboard, comprising: lateral faces (1 to 4) interconnected by means of the first parallel fold lines (5,6,7,9);   a bottom consisting of flaps (10 1 to 10 4) connected respectively   said second side faces (1 to 4) are provided with second fold lines (12 1 to 12 4) orthogonal to said first fold lines; and a lid consisting of inner flaps (11 2, 11 4) and outer flaps (11 1, 11 3), said flaps (11 1   4) being respectively connected to said lateral faces   (1 to 4) by third fold lines (13 1 to 13.4) orthogonal to said first fold lines and each inner flap (11 2, 11 4) being integral with a side face (2,4) lying between two lateral faces (1,3) to each of which is connected an outer flap (11 1, 11 3); characterized in that: the lateral edges (17) of said lid outer flaps (11 1, 11 3) comprise indentations (21), of which a portion (22) of the contour is rectilinear and at least approximately merging with the third line of corresponding folding (13 1, 13 3); and the side edges (17) of said lid inner flaps (11 2, 11 4) comprise protrusions   lateral sections (23), in correspondence with the said notches   res (21) and entering the latter to take   pressing on said rectilinear part (22) of the outline of said notches (21).   2. Case according to claim 1, characterized in that the contour of said notches, except for said rectilinear portion (22), is circular.   3 Box according to one of claims 1 or 2,   characterized in that said indentations (4) and said lateral protuberances (23) extend only over part of the lateral edges (17) of said outer flaps and inside the lid.   4 Blank of sheet material, such as cardboard or corrugated cardboard, for producing the box specified under   any one of claims 1 to 3, said blank comprising: a series of rectangular or square shutters (1 to 4)   connected to each other by first parallel fold lines (5,6,7,9); a first set of side flaps (10 1 to 10 4) disposed on one side of said sequence of flaps, connected thereto by second fold lines (12 1 to 12 4) perpendicular to said first fold lines and for forming the bottom of said box; and a second set of side flaps (11 1 to 11 4) disposed on the other side of said flap sequence, connected thereto by third fold lines (13 1 to 13 11) perpendicular to said first fold lines and for forming the lid of said box, said second set of side flaps having inner flaps (11 2, 11 4) to form the inner portion of said bottom and outer flaps (11 1, 11 3) to form the outer portion said background; characterized in that: the lateral edges (17) of said outer lid flaps (11 1, 11 3) comprise indentations (21), of which a portion (22) of the contour is rectilinear and at least 12 -   approximately coincident with the corresponding third fold line (13 1, 13 3); and the side edges (17) of said inner lid flaps comprise lateral protuberances (23) in correspondence with said indentations (21), said   side protrusions (23) being capable of penetrating trer in said indentations.   Blank according to claim 4, characterized in that the contour of said indentations, except   as regards said rectilinear part (22), is circular.   6 blank according to one of claims 4 or 5, characterized in that said indentations (21) and said   Side protrusions (23) extend only over a portion of the side edges (17) of said outer and inner lid flaps.