FR2813856A1 - CORNER-SHAPED CASE - Google Patents

Abstract

The packaging case is made from a pre-cut blank (30) and erected by folding. The rectangular median panel (45) is connected to the connecting strip (42) by an articulation strip (44) which is folded back against the connecting strip. The connecting strip and the back panel (49) are in the same direction in relation to the median panel and located in the same wedge compartment in order to reinforce one of the two triangular faces of this wedge compartment.

Description

The present invention relates to the technical field of packaging and

  packaging of various products in a case formed by folding a blank

  pre-cut from cardboard or the like.

  The cases used generally have a substantially parallelepipedal shape which, if it is capable of containing the product to be packaged, is not always capable of providing the latter with sufficient wedging to preserve its integrity. In order to take account of the particular form of the content, the case must therefore include an internal wedging structure which then defines a reception housing

for the product to be packaged.

  This is, for example, the case for the packaging of a tube produced from a sheath of deformable material and closed by the bottom, so that the tube has, at its mouth, a substantially cylindrical shape which will in

  flattening to present a shape at the substantially prismatic opposite end.

  Indeed, to ensure an efficient wedging of such a tube, it is necessary to have

  a housing, in the form of a wedge or a prism.

  The presence of corner housings can also be useful for packaging, for example, products in sachets which have one end

thicker than the other.

  In order to meet this need, the US Pat. No. 3,370,776 and the utility model DE 29,902,027 have both proposed a packaging case produced from a pre-cut blank of compact cardboard. This packaging case is mounted by folding to include a peripheral envelope with hinged panels intended to form a substantially parallelepiped case body, flaps and flaps for closing the transverse ends of the body. The case also includes an internal wedging structure forming a foldable and counterfixable extension of an articulated panel and comprising a connecting strip, a median panel and a counter panel, delimited and articulated together by oriented fold lines. so that the middle panel extends diagonally in the case body and delimits two

  compartments substantially wedge-shaped.

  According to these two documents, the connecting strip and the counter panel are articulated on two diametrically opposite parts of the middle panel, so that the connecting strip and the counter panel are folded in two directions.

  opposite to be arranged each in a separate compartment, wedge-shaped.

  The manner of producing the packaging case according to the prior art does not make it possible to obtain a median panel of exactly rectangular plan shape and one of the corners of the median panel is truncated so that the two compartments in

  corner communicate through an opening not occupied by the middle panel.

  However, the presence of this opening is unsightly and detrimental to the

  partitioning function of the middle panel.

  In order to remedy this drawback, it therefore appeared the need to have a packaging case, the structure of which makes it possible to obtain a median panel of exactly rectangular shape so as to partition the case in two.

  corner compartments which do not communicate with each other.

  To achieve this objective, the invention relates to a packaging case, of the type produced from a precut blank and mounted by folding to include: * a peripheral envelope with hinged panels intended to form a case body, flaps and closing flaps of the transverse ends of the case body,

  * and an internal wedging structure forming a folding and counter-extending

  fixable of an articulated panel and comprising a connecting strip, a median panel and a counter-panel delimited and articulated together by fold lines oriented so that the median panel extends diagonally in the

  case body and delimits two compartments substantially in the form of wedges.

  According to the invention, this case is characterized in that the middle panel is connected to the connecting band by a hinge band intended to be folded

against the connecting strip.

  The invention also relates, for the production of the case, to a precut blank comprising, on the one hand, a first part, called an envelope, composed of four panels articulated one after the other by lines of parallel folding, some of said panels being extended at the end by folding flaps, while others are provided with closing flaps of the case body formed by said panels and, on the other hand, a second part, called internal wedging , which includes: * a connecting strip connected to the last articulated panel, by a fold line parallel to that separating the last articulated panel from the adjacent panel, and intended to provide a fixing surface for the first panel, in order to form the body case, 5. an articulation band connected to the connecting band by a fold line forming an angle a with the fold line separating the link band from the articulated panel, a middle panel and a counter panel which extend from the articulation band being delimited by two fold lines, parallel to each other, the counter panel having, opposite the fold line, a bearing edge converging substantially with the fold line separating the counter panel from the middle panel in the same direction as that in which the fold lines converge between, on the one hand, the last articulated panel and the strip of

  connection and, on the other hand, the connecting band and the articulation band.

  According to another characteristic of the invention, the middle panel has

an exactly rectangular shape.

  Various other characteristics will emerge from the description given below.

  below with reference to the accompanying drawings which show, by way of examples not

  limiting, embodiments of the subject of the invention.

  Fig. 1 is a flat view of a precut blank for making a

  case according to documents US 3,370,776 and DE 29 9 02 027.

  Fig. 2 is a perspective of the case according to the prior art produced by folding the blank illustrated in FIG. 1 showing, more particularly, the internal structure of

shimming the case.

  Fig. 3 is a section along the HI-HI plane of FIG. 2 of this case according to

prior art.

  Fig. 4 is a plan view of a blank precut for the constitution

a case according to the invention.

  Fig. 5 is a perspective of a case according to the invention, formed from the

blank illustrated in fig. 4.

  Fig. 6 is a longitudinal section along the plane VI-VI of FIG. 5.

  Fig. 7 is a cross section along the plane VII-VII of FIG. 5.

  Fig. 8 is a plan view of a blank precut for the formation of a

  variant of the case according to the invention.

  Fig. 9 is a longitudinal section, similar to FIG. 6, from the case obtained

from the blank according to fig. 8.

  Fig. 10 is a plan view of a precut blank for the formation of a case according to the invention, comprising an internal reinforcement structure of the bottom of one of the

corner compartments.

  Fig. 11 is a longitudinal section similar to that of FIG. 6 of

  case made from a precut blank illustrated in fig. 10.

  Fig. 12 is a cross section along the line XII-XII of FIG. 11.

  Fig. 13 is a plan view of a precut blank for the formation of a case, substantially similar to that of FIGS. 10 to 12 but having another form

  for making the internal structure for rendering the bottom of one of the compartments.

  Fig. 14 is a longitudinal section of a case obtained from the blank

illustrated in fig. 13.

  Fig. 15 is a cross section along the line XV-XV of FIG. 14.

  In order to better understand the contribution of the invention compared to the prior art, FIGS. 1 to 3 recall, in detail, the teaching of documents

US 3,370,776 and DE 29,902,027.

  As shown in fig. 1, the precut blank, for producing by folding a case according to the prior art, comprises a first part A, called the peripheral envelope, which comprises four panels 1, 2, 3, 4 articulated one after the other others by parallel fold lines 5, 6, 7. Some panels, 1 and 3, are extended at the end by folding flaps 8, while the other two panels, 2 and 4, are each provided with a flap of closing of the transverse ends of the

  case body 10 and 11, respectively high and low.

  The precut blank also includes a second part B, called internal wedging, constituted in particular by a connecting strip 12 connected to the last articulated panel 4 by a fold line 13 parallel to that 7 separating the last panel 4 from the adjacent panel 3. This connecting strip is intended to provide a fixing surface for the first panel 1, in order to form the case body, as illustrated in FIG. 2. The internal wedging part B also comprises a middle panel 15 and a counter panel 16 which extend from the connecting strip, being delimited by two fold lines 17 and 18, parallel to each other and forming an angle with the fold line 13. The counter panel 16 has an edge

  support 19 intended to be placed in the angle defined by the fold line 6.

  It should be noted that, taking into account the relative arrangement of the middle panel 15 and the connecting strip 12, the angle of the middle panel 15 located on the side of the connecting strip 12 is truncated so that the middle panel 15 does not

  does not have an exactly rectangular shape.

  It appears, more particularly from FIG. 1, that the fold lines 17 and 18 are diametrically opposite with respect to the middle panel 15, so that the counter panel 16 and the connecting strip 12 are connected to opposite portions, respectively low and high, of the middle panel 15 Similarly, it appears that the fold lines 13 and 17 converge downward, while the edge 19 and the line 18

converge towards the top of the case.

  Given the orientation of the fold lines 17 and 18, the middle panel 15 extends, when the case is mounted, as illustrated in FIG. 2, diagonally in the case body E formed from part A of the precut blank. The middle panel 15 then delimits two compartments 20, 21 which are substantially wedge-shaped or

of prism.

  However, given the shape of the middle panel 15, the corner C of one of the compartments is open to the other compartment so that the two compartments communicate. In addition, this opening C is unsightly when the case E is opened. The invention therefore aims to remedy these drawbacks by proposing, in particular, to arrange, inside the case, two compartments in corner

perfectly partitioned.

  To this end, according to a first embodiment, the case according to the invention is produced from a precut blank, generally designated by the reference 30 and illustrated in FIG. 4 on which the edges and cutting lines are

  shown in solid lines, while the fold lines are shown in phantom.

  The blank 30 can be made of any suitable material and, preferably but not

exclusively, in compact cardboard.

  The precut blank 30 comprises a first part I, called the peripheral envelope, intended to form, by folding, the body of the case. This first part I comprises, in particular, four panels 31, 32, 33, 34 articulated, one after the other, by parallel fold lines 35, 36, 37. Some panels, 31 and 33, are extended at the end by folding flaps 38, while the other two panels, 32 and 34, are each provided with a closing flap 40 and 41 at the ends of the

  case body, respectively high and low.

  The blank 30 also comprises a second part II, known as an internal wedging structure, which consists, in particular, of a connecting strip 42 extending in the extension of the last articulated panel 34. The connecting strip 42 is connected to the last panel 34 by a fold line 43 parallel to that 37 separating the

  last panel 34 of the adjacent panel 33.

  The internal structural part H also includes a hinge band 44 connecting the connecting band 42 to a middle panel 45. The hinge band 44 is separated from the connecting band 42 by a fold line 46 which forms with the fold line 43 an angle a while converging towards a so-called lower end of the case or of the blank 30. Furthermore, the articulation band 44 is separated from the middle panel 45 by a fold line 47. According to the example illustrated , the articulation band 44 extends only over part of the height of the connecting band 42 and the median panel 45, in the lower part of the latter which are then separated in the upper part by

"U" notch 48.

  The median panel has, opposite the articulation band 44, a counter panel 49 which is separated from the median panel 45 by a fold line 50, parallel to the fold line 47 separating the median panel 45 from the hinge band. Preferably, but not strictly necessary, the fold line 47 is parallel to the fold line 43. In addition, it should be emphasized that, in accordance with a characteristic of the invention, the middle panel 45 has a rectangular shape and that none of its angles is truncated. This difference between

  the invention and the prior art is clear from the comparative analysis of FIGS. 1 and 4.

  The shaping of the case according to the invention, from the blank 30, is carried out for example, by successive and alternating folding, along lines 46, 47 and 50, of part II of the blank in, respectively , the direction of the arrows Fi, F2 and F3. During this folding, the articulation band 44 is folded against the internal face of the connecting band 42. Preferably but not strictly necessary, the articulation band 44 is then fixed on the connecting band 42 by any means suitable and preferably by gluing. The mounting of the case continues by a successive folding along the lines 35, 36, 37 and 43 of the part I of peripheral envelope, so as to come fix the first articulated panel 31 against the connecting strip 42 by

  any suitable means, such as, for example, by bonding.

  Against the panel 49 has, opposite the line 50, a bearing edge 51 which comes to be placed in the angle defined by the fold line 37. It should be noted that the edge 51 defines with the line folding 50 an angle J which corresponds to the inclination of the middle panel 45 inside the case body defined by the articulated panels 31 to 34. In addition, the folding line 50 and the bearing edge 51 converge to the so-called part

bottom of the case.

  After assembly, the connecting strip 42 is located against the first panel 31, while the counter panel 50 is located against the third

panel 33.

  The case thus formed is illustrated in perspective in FIG. 5 and in section in FIGS. 6 and 7. It appears from FIG. 5 that the middle panel 45 extends diagonally in the case body. The position of the middle panel 45 is shown clearly in FIG. 6 and it appears that the inclination of the panel 45 defines, in the case body, two

  compartments 52 and 53 of substantially prismatic or corner shape.

  In addition, the exactly rectangular shape of the middle panel makes it possible to perfectly partition and separate the two compartments 52 and 53. It should be noted that preferably the middle panel 45 has a length sufficient to extend into the case from the lower edge 54 of the last hinged panel 34

  up to the upper edge 55 of the second articulated panel 32.

  When the object intended to be packaged in one of the compartments 52, 53 of the case is curved, the middle panel 45 preferably has two slots 56 arranged in a cross to allow the adaptation of the middle panel 45 and of the compartment 52 to the shape of the object. According to the invention one or more cutouts could also be made in the middle panel to define one or more

  several wedging cells for packaged products.

  According to a preferred but not strictly necessary feature of the invention, the median panel 45 has, at its lower end, an articulated holding tab 57 intended to bear on the internal face of the panel

  articulated 32 located opposite the lower end of the middle panel 45 ..

  To this end, the retaining tab 57 extends from a fold line 58 perpendicular to the fold lines 47 and 50 and has, opposite the line 58 a

  support edge 59 parallel to the latter.

  During the shaping of the case, and before closing the bottom of the latter, the retaining tab 57 is folded towards the inside of the case so as to place the edge 59 in abutment against the internal face of the second articulated panel 32. The use of the retaining tab 57 advantageously makes it possible to reinforce the point of the compartment 52 by preventing the lower end of the middle panel 45 from moving away from the articulated panel 34 during the introduction of an object in the

compartment 52.

  Figs. 8 and 9 illustrate another embodiment of the case according to the invention, according to which the blank 30, constituting the case, has the same elements as those described in relation to FIG. 4, the middle panel 45 does not have

  however, no holding tab at the bottom.

  This other embodiment differs from that illustrated in FIG. 4 in this

  that the counter panel 49 has, opposite the middle panel 45, a counter

  reinforcement tab 70 which is separated from the counter-panel 49 by a fold line 71 parallel to the support edge 51 and situated in the extension of the latter. The fold line 71 then achieves, with the fold line 48, an angle 13. The reinforcing lug 70 is preferably connected to the counter panel 46 in the lower part of the latter, towards the point of convergence of the fold lines 50 and 71. The lug of

  reinforcement 70 defines, opposite line 71, a bearing edge 72.

  The precut blank, thus formed, is shaped substantially in the same way as has been described in connection with FIG. 4, so as to constitute the case according to the invention. During this shaping, the reinforcement lug 70 is folded against the panel 49 by the formation of the fold line 72. This last fold is carried out so that, after the shaping of the case, as illustrated in fig. 12, the reinforcing lug 70 is pressed against the articulated panel 33 and its edge 72 is in abutment against the panel 32 in the angle formed by the line of

folding 36.

  Thus, the lug 70 reinforces the lower part of the compartment 51 and the triangular faces corresponding to the panels 33 of the compartment 52. In addition, the lug 72 thus ensures immobilization and wedging of the counter panel 46

  contributing to the correct positioning of the middle panel 45.

  Figs. 10 to 12 illustrate another embodiment of the case according to the invention according to which the blank 30 constituting the case has the same elements as those described in relation to FIG. 4 the middle panel does not, however,

  not holding tab at the bottom.

  In order to provide reinforcement for the corner point corresponding to the bottom of the compartment 51, the blank 30 also has a folding extension III intended to constitute an internal reinforcement structure. According to the example illustrated in FIG. 10, the reinforcement extension m extends at the bottom of the third articulated panel 33 from a fold line 80 perpendicular to the fold lines 36 and 37. The reinforcement extension III then comprises two flaps 81 and 82 separated by a fold line 83 parallel to the fold line 80. It should be noted that the line of

  folding 80 contributes to delimiting the lower edge of the third articulated panel 33.

  The shaping of the case from the blank 30, thus formed, is carried out in a manner substantially similar to that described in relation to FIG. 4. When the bottom of the case is closed, the folding extension III is brought towards the inside of the case so as to interpose the second flap 82 between the middle panel 45 and the internal face of the second articulated panel 32 as this is evident from fig. 11 and 12. The second flap 82 then has a width sufficient to be in permanent support on the median panel 45 and the articulated panel 32, so as to wedge the median panel 45. This advantageous arrangement of the invention thus makes it possible to strengthen the lower corner of the first compartment 52 so as to prevent the bottom of the middle panel 45 from being separated from the fourth articulated panel 34 when

  the introduction of an object into compartment 52.

  Figs. 13 to 15 illustrate an alternative embodiment of the case according to

  the invention as described in relation to FIGS. 10 to 12.

  According to this alternative embodiment, the folding extension m extends from the fold line 80, delimiting the edge of the third articulated panel 33, and comprises three articulated bands 85, 86 and 87 delimited by fold lines 88 and 89 parallel to the first fold line 80. The extreme articulated band 87 also has, opposite the articulated panel 33, a counter-fixing band 90 separated from the extreme articulated band 87 by a fold line 91 parallel to the lines folding 81, 88 and 89. The shaping of the case from the blank precut as well

  constituted is carried out as follows.

  Before folding of the parts I and II of the blank, as described above, the reinforcement extension III is folded down on the internal face of the third articulated panel 33, the counter-fixing strip 90 then being fixed against the latter by any appropriate means and, preferably by gluing. During this operation, the various fold lines 82, 83 and 91 are marked to allow subsequent shaping of the reinforcement III, as will appear later. After complete shaping of the case body and when it is desired to close the bottom of the latter, the extension mI is folded back inside the case, so as to interpose said extension III between the middle panel 45 and the internal face of the second articulated panel 32, as shown in FIG. 14. During this positioning, the articulated bands 85 and 87 extend substantially parallel to the bottom of the case and perpendicular to the articulated panels 31 to 34 and the intermediate articulated band 86 extends substantially vertically, as shown in the fig. 4. After the reinforcement structure III has been put in place and the flap 38 has been folded, the flap 41 can be closed. It should be noted that, to ensure good wedging of the lower part of the middle panel 45, the extreme articulated band 85 then has a width substantially equal to the distance separating the internal face of the second panel.

  articulated 32 of the face opposite the middle panel 45.

  Thus, the reinforcing structure 45 prevents the lower part of the middle panel 45 from moving away from the last articulated panel 34 when an object is introduced.

  in the first corner compartment 52.

  The invention is not limited to the examples described and shown, because

  various modifications can be made without departing from its scope.

Claims (15)

CLAIMS:   1- Packaging case, of the type made from a blank (30) precut and mounted by folding to include: A peripheral envelope with articulated panels (31, 32, 33, 34) intended to form a case body , flaps (40, 41) and flaps (38) for closing the transverse ends of the case body,   * and an internal wedging structure forming a folding and counter-extending   fixable with an articulated panel (34) and comprising a connecting strip (42), a middle panel (45) and a counter-panel (43) delimited and articulated together by fold lines (47, 50) oriented so that the middle panel (45) extends diagonally in the case body and delimits two compartments (51, 52) substantially in the form of wedges, characterized in that the middle panel (45) is connected to the strip of connection (42) by a hinge band (44) intended to be folded against the connecting strip (42).   2 - packaging case according to claim 1, characterized in that   the middle panel (45) has a rectangular shape.   3 - Case according to claim 1 or 2, characterized in that the strip   of articulation is fixed on the connecting strip.   4 - Case according to one of claims 1 to 3, characterized in that the   against the panel (46) has, opposite the median panel (45), a lug of   reinforcement (70) intended to wedge the counter-panel (46).   - Case according to one of claims 1 to 3, characterized in that the   median panel (45) comprises, at the level of a so-called low end, at least one articulated holding tab (57) intended to bear on the internal face of the   hinged panel (32) located opposite the lower end of the middle panel.   6 - Case according to one of claims 1 to 4, characterized in that it   has an internal structure (I) for reinforcing the corner corresponding to the bottom of one of the compartments (52) which is intended to be interposed between the middle panel (45) and the internal face of the articulated panel (32) located at the opposite of the panel median (45).   7 - Case according to claim 6, characterized in that the reinforcing structure is formed by a folding extension (III) located in the lower part of a panel   articulated (33) defining the peripheral envelope.   8 - Case according to claim 7, characterized in that the folding extension (m) extends from a first fold line (80) delimiting the edge of the articulated panel (33) and comprises three articulated bands (85, 86 , 87) delimited by lines of folds parallel (88, 89) to the first line (80), the articulated band   end (87) having, opposite the articulated panel (33), a strip of counter   fixing (90) intended to be fixed on the internal face of said articulated panel (33).   9 - Case according to claim 7, characterized in that the folding extension (III) extends from a first fold line (80) delimiting the edge of the articulated panel (33) and comprises two flaps (81, 82) separated by a line of   folding (83) parallel to the first folding line (80).   - Case according to one of claims 1 to 9, characterized in that the   middle panel (45) has at least one cutout which defines a cell   for a packaged unit product.   11 - Case according to claims 1 to 9, characterized in that the panel   median (45) has two slots (56) arranged in a cross and intended to allow the adaptation of the median panel (45) to the shape of a product arranged in one of case compartments (52).   12 - Case according to claim 1 or 2, characterized in that it is obtained by folding a pre-cut blank (30) comprising, on the one hand, a first part (I), called envelope, composed of four panels (31, 32, 33, 34) articulated one after the other by parallel fold lines (35, 36, 37), some of said panels (31, 33) being extended at the end by folding flaps (38 ), while others (32, 34) are provided with closing flaps (40, 41) of the case body formed by said panels and, on the other hand, a second part (II), called internal wedging which comprises: * a connecting strip (42) connected to the last articulated panel, by a fold line (43) parallel to that (37) separating the last (34) panel from the adjacent panel (33), and intended to offer a fixing surface for the first panel (31), in order to form the case body, To a hinge band (44) connected to the connecting band (42) by a fold line ( 46) forming an angle (a) with the fold line separating the connecting strip from the articulated panel, * a middle panel (45) and a counter panel (49) which extend from the articulation band ( 42) being delimited by two fold lines (47, 50), mutually parallel, the counter panel (49) having, opposite the fold line (50), a bearing edge (51) substantially converging with the fold line (50), separating the counter panel (49) from the middle panel (45) in the same direction as that in which the fold lines (43 and 47) converge between, on the one hand, the last hinged panel and the   connecting band and, on the other hand, the articulation band.   13 - Case according to claim 8, characterized in that the fold line (47), separating the middle panel (45) of the articulation band (44), is parallel to   that (43) separating the connecting strip (42) from the last articulated panel (34).   14 - Case according to claim 12 or 13, characterized in that the counter   panel (49) comprises, in the lower part, a reinforcement lug (70) extending opposite the median panel (45) from a fold line (71) situated in the extension of the edge d support (51) and having a support edge (72) parallel to the   fold line (71) separating the lug (70) from the liner (46).   -Case according to claim 12, characterized in that the third articulated panel (33) has, in the lower part, a folding extension (III) intended to constitute an internal structure for reinforcing the corner corresponding to the bottom of one of the compartments (52).   16 - Case according to claim 15, characterized in that the folding extension (III) extends from a first fold line (80) delimiting the edge of the articulated panel (33) and comprises three articulated bands (85, 86, 87) delimited by lines of folds parallel (88, 89) to the first line (80), the articulated band   end (87) having, opposite the articulated panel (33), a strip of counter   fixing intended to be counter-fixed on the internal face of said articulated panel (33).   17 - Case according to claim 15, characterized in that the reinforcement extension (mII) extends from a first fold line (80) delimiting the edge of the articulated panel (33) and comprises two flaps (81, 82) separated by a line of   folding (83) parallel to the first folding line (80).   18 - Case according to one of claims 12 to 17, characterized in that the   median panel (45) comprises, at the level of a so-called low end, at least one articulated holding tab (57) intended to bear on the internal face of the   hinged panel (32) located opposite the lower end of the middle panel.