FR2900391A1 - Suppressed/pre-cut cardboard/corrugated cardboard blank for forming package, has passage unit passing film from flaps to package`s interior when package is formed such that film is present inside package during/after package formation - Google Patents

Abstract

The blank (10) has flaps (5, 24), and a thermoshrinkable film (7) e.g. transversal sectioned tube, including parts (7a, 7b) in which the part (7a) is detachably bonded on an adhesive point (3) and the flap (24) adjoining with a rectangular panel (2), and the other part (7b) receives an article resting on a central panel (1). The film is subjected to a retraction phase during a package formation. The flaps have a passage unit (4) passing the film from the flaps to a package`s interior when the package is formed such that the film is present inside the package during/after the package formation.

Description

Flan for making a package made of a semi-rigid material, equipped

  on at least one side of a film. The present invention relates to a blank made of a semi-rigid material such as cardboard or corrugated cardboard, precut and reprocessed, equipped on one side with a film of heat-shrinkable material, for producing a new packaging. The invention also relates to the packaging made from this blank. Such packaging is very popular with users because of its simplicity, ease of use and high reliability, and many variations are available in the art. The French patent application FR-A 1-2 837 742 of the Applicant describes a blank for the realization of a semi-rigid material packaging, equipped on one side with a film of a heat-shrinkable material. The package mounted from this blank is also described. Unfortunately, in practice, the film often needs to be larger in area than the available expanded surface of the blank, and this is why it has been envisaged to use two overlapping films welded at each end (hence a shape of tube). However, in this case, the setting of said conditioning volume proves delicate, and may be the source of tearing of the semi-rigid material in the case of the passage of force of the film by the free edges of the flaps after setting volume of the 'packaging.

  The present invention is concerned with packages of this type originating from a pre-cut and repressed blank, which is equipped with a film of heat-shrinkable material extending over at least one of the panels intended to form walls or parts of packaging walls. , as well as on at least one of the flaps or flaps hinged by upsetting these flaps and intended to overlap at least partially when the package is set volume. The invention aims more particularly to provide a blank of semi-rigid material for producing such packages, which allows easy passage of the heat-shrinkable film during the setting volume of the blank which it is secured.

  For this purpose, the subject of the invention is a pre-cut and repressed blank made of a semi-rigid material, such as cardboard or corrugated cardboard, for producing a package, this blank comprising:

  three substantially rectangular panels and of substantially the same length, articulated together along their longitudinal edges by first parallel upsets, namely a first central panel and two second panels articulated on this first panel and intended to be erected perpendicular thereto; - At the ends of the first and second panels, flaps hinged to these panels by second upsets perpendicular to the first upsetting, these flaps being intended to be erected perpendicular to the adjacent panels to cover at least partially the adjacent flaps; a film of heat-shrinkable plastic material, this film comprising at least two parts, a first part rigidly secured by bonding the first panel and possibly a portion of the second panels and a portion of the flaps, preferably flaps adjoining the first panel, said first portion being further releasably adhered by at least one point of glue on the second panels and / or the flaps adjacent to these second panels, and a second portion intended to cover articles that may be based on the first panel, the film being intended to be subjected to a retraction phase, when setting the volume of the package; the blank being characterized in that the flaps comprise at least one means of passage of a portion of the film from the flaps to the inside of the package when the package is set in volume, so that all the film is present inside the packaging as soon as or after the packaging is put in volume. According to the invention, the two second panels may be of the same dimensions, but they may also be of different size (s).

  According to the invention, during the setting volume means prior to setting volume or during setting volume. According to the invention, the blank may comprise at least one, preferably at least two means of passage at each longitudinal end of the panels of the blank. More preferably according to the invention, the blank comprises four means of passage. According to the invention, the passage means may be chosen from cutouts and lines of weakness. It can be a set of

  cuts of particular shapes, or a set of cuts associated with at least one line of weakness, or at least one line of weakness. A line of weakness generally defines a flap, which, by its movement along this line, allows the passage of the film.

  According to a preferred embodiment of the invention, the film is in the form of a tube of cross-section with respect to the panels of the blank, in that it comes from two strips of film of substantially the same length, and possibly of the same width. , welded together at each of their ends which are not located on the side of the flaps, substantially parallel. Then, the first part of the tube is a half upper tube farthest from the panels and the second part of the tube is a lower half tube closest to the panels. In this case, the tube may be opened before placing the package in volume, for example by an opening made on the farthest part of the panels, over the entire length of the film in the longitudinal direction relative to the tube. For the volume of the packaging, it rectifies the second panels and adjoining flaps. When packaging volume, it can be formed by any means known in the art, for example by gluing the flaps. After setting the volume of the packaging from this blank, it is put in place the articles to be packaged on the face of the first panel coated with the film of heat-shrinkable material, the film is detached from other panels and flaps which it is solidarity it is folded over the articles resting on the first panel and then the film is generally shrunk by heating, so that it encloses the packaged articles to make them integral with the first panel. Then, the parts of the film stuck on the: flaps deposited at the ends of the central panel are, according to the invention, easy to pull the film inwardly of the packaging thus produced, from the overlapping parts with the contiguous flaps. The invention also relates to a package from a blank previously described according to the invention, said packaging being set in volume from said blank and said package being capable of containing articles resting on the first part of the film. The invention finally relates to a package resulting from a blank previously described according to the invention, said packaging being put into

  volume from said blank and said package being capable of containing articles resting on the first part of the film, the second part of the film being capable of covering and possibly holding in position at least a portion of said articles.

  Other features and advantages of the blank of the invention will emerge from the detailed description which follows of four embodiments of this blank. In this description, reference is made to the accompanying drawings, in which: Figure 1 is a plan view of a first corrugated cardboard blank pre-cut and discharged according to the invention. Figure 2 is a partial perspective view of a first package according to the invention set volume from the blank of Figure 1; Figure 3 is a plan view of a second corrugated cardboard blank precut and repressed according to the invention.

  Figure 4 is a plan view of a third corrugated cardboard blank precut and repressed according to the invention. Figure 5 is a plan view of a fourth corrugated cardboard blank pre-cut and discharged according to the invention. Figure 6 is a partial perspective view of a fourth packaging according to the invention set volume from the blank of Figure 5, being set volume. Figure 7 is a partial perspective view of the fourth package of Figure 6, once set volume. Referring first to Figure 1.

  The blank 10 shown comprises three rectangular panels of the same length, articulated to each other by first parallel upsets, arranged along their longitudinal sides, namely a central panel 1 and two second panels 2 of the same width, articulated laterally on the panel 1, the panels 1 and 2 being intended to be straightened perpendicularly to each other when setting volume of the package. At the ends of these panels are articulated by second upsets perpendicular to the previous flaps referenced respectively 5, for the panel 1, and 24 for the panels 2. The flaps 5 and 24 are intended to be straightened perpendicularly to the associated panels, during the setting volume of the package from the blank 10, forming flaps that partially cover the flaps

  contiguous. A film 7 made of a thermosetting material extends over the panels 1 and 2, which it covers almost completely, and on the flaps 24 and 5, which it covers at least partially. This film is intended, in a manner known per se, to be at least partly folded over articles of various shapes that can rest on the panel 1 and then be heat-shrunk prior to setting the volume of the package, so as to enclose firmly packed items and to make them integral with the panel 1.

  According to the invention, the heat-shrinkable film 7 is rigidly secured to the panel 1, with the aid of four parallel strips 6b of glue in the longitudinal direction of the panels, and also here of the two flaps 5 with the aid of four parallelepipeds or glue tabs 6a, the set of collages 6a and 6b forming the gluing means 6. But one could also use according to the invention any other mode of gluing. The film 7 is also detachably fixed, using four points of glue 3, on a portion of the flaps 24, in the vicinity of their free edges. According to the invention, the film 7 comprises two parts 7a and 7b which are initially distinct and which have been welded together on the second panels 2 and the adjoining flaps 24 during the production of the blank 10. A first part 7a is rigidly secured by gluing 6 of the first panel 1 and a portion of the flaps 5, and is further adhesively bonded to the flaps 24, as explained above. A second part 7b is intended to cover articles that can. resting on the first panel 1. In the case shown in Figure 1, the film 7 is, after welding parts 7a and 7b, a cross-sectional tube relative to the panels 1 and 2, the first part 7a being the half tube the farthest one of the panels 1 and 2 and the second part 7b being the lower half tube closest to the panels 1 and 2. According to the invention, the tube 7 comprises two rupture lines or longitudinal openings, over the entire length of the tube in the longitudinal direction relative to the tube 7. A first breaking line, 7c, is formed just in the middle of the upper half tube, and a second breaking line, 7d, is formed just in the middle of the lower half tube. The manufacture of the tube 7 led to the realization of these two lines of rupture. According to the invention, the flaps 5 and 24 comprise four means 4 for passing a portion 7b of the film 7 from these flaps to the inside of the package when the package is set in volume, so as to that all the film 7 is present inside the package once the packaging volume. In the case of Figure 1, the passage means 4 comprises a main cut 4c of the flap 24, substantially in the longitudinal direction of the panels, in the vicinity of the junction line between the flap 5 and the flap 24, embellished with a small secondary cutout 4b which is perpendicular to it, in the vicinity of the junction between the flap 24 and the panel 2, but not adjacent to said junction, and completed by a line of weakness 4b, which starts from the end of the cutout 4b the further away from the flap 5, and which will join transversely the edge of the flap 24 farthest from the panel 2, said edge forming substantially an almost triangular trapezium whose large base is the portion of said edge located on the cutting side 4c, the short side is the edge of the cut 4c, and the two lateral sides are the edge of the flap 24 corresponding to the edge of the cut 4c and said line of weakness 4b. The passage means 4 thus consists of the cutouts 4a and 4c, and the line of weakness 4b. The pre-equipped blank 10 coated with the heat-shrinkable film can thus be easily transported, handled and stored flat. In use, the articles to be packaged are placed on the face of the panel 1 coated with the film 7 ie on the part 7a of the film 7, then the film 7 is separated from the panels 3 and the flaps 5 and 6, to be folded on these objects and be heat-shrunk, the package 100 can then be shaped as shown in Figure 2, by gluing the flaps 24 on the flaps 5. During this shaping, the printing of the film 7 so as to that all the film 7 is present inside the package 100 when the package 100 is volume is facilitated, very advantageously according to the invention, by the presence of the means 4 passage. In FIG. 2, the tube 7, just after setting volume, has been opened by the precut line 7c, giving rise to the separation of the second part 7b into two parts 7'b and 7 "b of edges 7'c and 7 "c. It is thus easy to dispose of the articles on the bottom 7a of the tube 7, then to cover and possibly maintain in position at least one

  part of said articles by the parts 7'b and 7 "b Figure 3 is a plan view of a second blank 20 made of corrugated cardboard precut and repressed according to the invention This second blank 20 has many elements closer to the elements making up the blank 10 of FIG. 1, with the exception of the passage means of the film, which are different although close, The blank 20 comprises a first panel 8, with two flaps 9, and two second panels 11, each comprising two flaps 12. The film 13 is a closed tube (formed, as for the blank 10 of the figure, of the two parts 13a and 13b initially welded to the second panels 11 and the adjoining flaps 12), comprising an upper half tube 13b, 1c, and a lower half-tube 13a, of rupture line 13d, The half-tube 13a is bonded by the fixed bonding means 6, and a detachable bonding means consisting of four bonding points 15 (one point). gluing 15 per flap 12) According to the invention, the flaps 9 and 12 comprise four means 14 for passing a portion 13b of the film 13 from these flaps to the inside of the package when the package is placed in volume so that all the film 13 is present inside the package once the packaging volume. In the case of FIG. 3, this passage means 14 comprises a main cutout 14b, substantially of rectangular shape, the width of which is a small part of the junction, on the associated folding line, between the flap 12 and the panel 11. c of the flap 24, the cut 14b being of substantially elongate shape along an axis perpendicular to said fold line. The cut 14b, about a quarter of the length of the flap 12, in the longitudinal direction of the panels 9 and 11, widens obliquely to form a wider rectangular and elongated shape, which is a cutout 14a, extending to at the edge of the flap 12 farthest from the panel 11. The passage means 14 is constituted by the cuts 14a and 14b. Figure 4 is a plan view of a third blank of corrugated cardboard precut and repressed according to the invention. This third blank 30 has many elements approximating the elements making up the first blank 10 of FIG. 1 or the second blank 20 of FIG. 3, with the exception of the film passing means, which are different although close. The blank 30 comprises a first panel 16, with two flaps 17,

  and two second panels 18, each having two flaps 19. The film 21 is a closed tube comprising an upper half-tube 21b, of pre-cut rupture line 21c, and a lower half-tube 21a, of rupture line 21d, this half-tube 21a being bonded by the fixed bonding means 6 and a releasable bonding means consisting of four bonding points 23, a bonding point 23 per flap 19. According to the invention, the flaps 17 and 19 comprise four means 22 for passing the bond a portion 21b of the film 21 from these flaps to the inside of the package when the package; is set in volume, so that all the film 21 is present inside the package once the packaging volume. In the case of FIG. 4, this passage means 22 comprises a main cutout 22a of the flap 19, substantially in the longitudinal direction of the panels, in the vicinity of the junction line between the flap 19 and the flap 17, embellished with a small secondary cutout 22b which is perpendicular thereto, in the vicinity of the junction between the flap 19 and the panel 18, but not adjacent to said junction, and completed by a line of weakness 22c, which starts from the end of the cutout 22b further away from the flap 17, and which will join transversely the corner intersection between the edge of the flap 19 furthest from the panel 18 and the edge of the cutout 22a, said edge forming substantially a triangle whose three sides are the edge of the cutout 22b, the edge of the flap 19 corresponding to the edge of the cutout 22a and said line of weakness 22c. The passage means 22 thus consists of the cutouts 22a and 22b, and the line of weakness 22c.

  Figure 5 is a plan view of a fourth blank 40 corrugated cardboard precut and repressed according to the invention. This fourth blank 30 has, with the exception of the flaps, many elements approaching the elements constituting the first blank 10 of FIG. 1 or the second blank 20 of FIG. 3 or the third blank 30 of FIG. the exception of the means of passage of the film which are different although close. The blank 40 shown in FIG. 5 comprises three rectangular panels of the same length, hinged together by first parallel upsets, arranged along their longitudinal sides, namely a central panel 25 and two second panels 27 of the same width, articulated laterally on the panel 25, the panels 25 and 27 being intended to be straightened perpendicularly to each other during the setting volume of the package.

  At the ends of these panels are articulated by second upsets perpendicular to the previous flaps referenced respectively 26, for the panel 25, and 33 and 34 for the panels 27. The flaps 26, 33 and 34 are intended to be straightened perpendicular to the associated panels when setting the volume of the package from the blank 40, forming flaps that partially overlap the contiguous flaps. A film 28 of a thermosetting material extends over the panels 25 and 27, which it covers almost completely, and on the flaps 26, 3 and 34, which it covers at least partially. This film 28 is intended, in a manner known per se, to be folded over articles of various shapes that can rest on the panel 25 and then be heat-shrunk prior to setting the volume of the package, so as to firmly grip the articles. conditioned and to make them integral with the panel 25. According to the invention, the heat-shrinkable film 28 is rigidly secured to the panel 25, with the aid of three parallel strips 29a of glue in the transverse direction of the panels, and also here of the two panels 27 using four parallelepipeds or glue tabs 32, in the vicinity of their free edges, the set of collars 29a and 32 forming the gluing means 29. But it could equally well be used according to the invention any other mode lift-off. In the case shown in FIG. 5, the film 28 is a tube initially formed from two strips of superimposed films and welded together on the second panels 27 and the adjacent flaps 33 and 34. According to the invention, the film 28 comprises two parts 28a and 28'b, 28 "b) A first part 28a is rigidly secured by gluing 29a of the first panel 25 and the second panels 27, as explained above, A second part (28'b, 28" b) is intended to cover articles that can rest on the first panel 25. In the case shown in Figure 5, the film 28 is in the form of a cross-sectional tube relative to the panels 25 and 27, the first part 28a being a half lower tube farthest from the panels 25 and 27, and the second part (28'b, 28 "b) being a half upper tube closest to the panels 25 and 27. The upper half tube (28'b, 28") (b) has been opened and has two symmetrical parts, 28'b and 28 "b, respective opening edge 28'c and 28 "c.

  According to the invention, the tube 28 comprises a rupture line 28 d or longitudinal opening, over the entire length of the tube in the longitudinal direction relative to the tube 28. The manufacture of the tube 28 has led to the realization of this break line .

  According to the invention, the flaps 26, 33 and 34 comprise four means 31 for passing the portions 28'b and 28'c of the film 28 from these flaps to the inside of the package when the package is put in volume, so that all the film 28 is present inside the package once the packaging volume. Unlike in the case of the preceding figures, where the setting volume of the package was automatic, the volume of the packaging is manual. The flaps 26, 33 and 34 are embedded in each other as will be shown in Figure 6. The two flaps 33 each comprise an opening 33b and a line of weakness 33a. The two flaps 34 each comprise two holes 35, which make it possible to weaken the cardboard for the flush mounting, and an opening 36. The flaps 26 each comprise, at the end farthest from the panel 25, an end tongue 26a, a cutout 26c, a central tongue 26b, intended to fit into the opening 36, another cut 26c, and another end tab 26a, and two lines of weaknesses parallel and close to one of the other, 26d and 26e, both parallel to the fold line between the flap 26 and the panel 25. In the case of Figure 5, the passage means 31 comprises a first cut 31c of the flap 34, of elongate shape and small width, substantially in the longitudinal direction of the panels, in the vicinity of the junction line between the flap 26 and the flap 34, embellished with a secondary cutout 31b which is perpendicular thereto, in the vicinity of the junction between the flap 34 and the panel 27 but not adjacent to said junction, and completed by a second cut 3la, larger than the first cut 31c, which extends the first cut in the same elongated direction, from the cut 31b, and which is delimited by an arc line which borders the flap 34, and which will join transversely the edge of the flap 34 farthest from the panel 27. The passage means 31 also comprises the low line 33a of the flap 33. The passage means 31 is constituted by cutouts 31a, 31b and 31c, and the line of weakness 33a.

  The pre-equipped blank 40 coated with the heat-shrinkable film can thus be easily transported, handled and stored flat. In use, the articles to be packaged are placed on the face of the panel coated with the film 28, that is to say on the portion 28a of the film 28, the parts 28'b and 28 "c of the film 28 thus released which can be folded on these objects and be heat-shrunk, the package 400 can then be shaped as shown in Figures 6 and 7, by embedding the flaps 26, 33 and 34. During this formatting, the drawing of the film 28 so that all the film 28 is present inside the package 400 when the packaging 400 is set in volume is facilitated by the presence of the passage means 31. FIGS. are two partial views in perspective of a fourth packaging according to the invention set in volume from the blank of Figure 5, being set volume in Figure 6 and once set volume in Figure 7. The figure 6 shows the flush mounting of the flaps 26, 33 and 34. In this figure, the film 28 does not have ty shown, for clarity. The flaps 33, 34 and 26 have been folded in this order, from the inside of the package 400 to the outside of the package 400. The main tab of the upper part of the flap 26 fits well into opening 36, which closes and secures the flaps between them. In FIG. 7, the film 28, just after setting volume, is freely present in two parts 28 'b and 28 "B. It is thus easy to arrange the articles on the bottom 28a of the tube 28, then to covering and possibly holding in position at least a portion of said articles by parts 28'b and 28 "b.

Claims (6)

  1. Blank (10, 20, 30, 40) pre-cut and discharged into a semi-rigid material, such as cardboard or corrugated cardboard, for producing a package (100, 400), this blank (10, 20, 30) , 40) comprising: - three panels (1, 2; 8, 11; 16, 18; 25, 27) substantially rectangular and of substantially the same length, articulated together along their longitudinal edges by first parallel upsets, namely a first central panel (1; 8; 16; 25) and two second panels (2; 11; 18; 27) articulated on this first panel and intended to be erected perpendicular thereto; at the ends of the first and second panels (1,2; 8,11; 16,18; 25,27), flaps (5,24; 9,12; 17,19; 26,33,34) hinged to these panels by second upsets perpendicular to the first upsets, these flaps (5, 24; 9, 12; 17, 19; 26, 33, 34) being intended to be erected perpendicularly to the panels (1, 2; 8, 11; 18, 25, 27) for at least partially covering the adjacent flaps; a film (7; 13; 21; 28) of heat-shrinkable plastic material, this film comprising at least two parts (7a, 7b; 13a, 13b; 21a, 21b; 28a, 28'b, 28 "b), a first portion (7a; 13a; 21a; 28a) rigidly secured by gluing (6,29) of the first panel (1; 8; 16; 25) and possibly a portion of the second panels (2; 11; 18; 27); a portion of the flaps (5, 24; 9, 12; 17, 19; 26, 33, 34), preferably flaps (5; 9; 17; 26) adjoining the first panel, said first portion (7a; 13a, 21a, 28a) being further releasably adhered by at least one glue point (3; 15; 23; 32) to the second panels (2; 11; 18; 27) and / or the flaps (24; 12; 19; 33,34) adjacent to these second panels (2; 11; 18; 27), and a second portion (7b; 13b; 21b; 28'b; 28 "b) intended to cover articles which can rest on the first panel (1; 8; 16; 25), the film (7; 13; 21; 28) being intended to be subjected to a retraction phase, when setting volume of the package (100, 400); the blank (10, 20, 30, 40) being characterized in that the flaps (5.24; 9, 12; 17, 19; 26, 33, 34) comprise at least one means (4; 14; 22; ) passing a portion of the film from the flaps (5, 24; 9, 12; 17, 19; 26, 33, 34) to the inside of the package (100, 400) when the package (100, 400) is set, so that the entire film (7; 13; 21; 28) is present inside the package (100, 400) as soon as or after the package (100, 400) is put in volume.   2. blank (10, 20, 30, 40) according to claim 1, such that the means (4; 14; 22; 31) passage is selected from the cuts (4a, 4c; 14a, 14b; 22a, 22b; 31a, 31b, 31c) and the lines of weakness (4b; 22c; 33a).   3. Flan (10, 20, 30, 40) according to one of claims 1 or 2, such that the film (7; 13; 21; 28) is tubular in cross-section with respect to the panels (1, 2, 8, 11, 16, 18, 25, 27) of the blank (10, 20, 30, 40), the first portion (7a; 13a; 21a; 28a) being an upper half-tube furthest from the panels (1 , 2, 8, 11, 16, 18, 25, 27) and the second portion (7b; 13b; 21b; 28'b, 28 "b) being a lower half-tube closest to the panels (1, 2; , 11, 16, 18, 25, 27).   4. Flan (10, 40) according to the preceding claim, such that the tube (7; 28) is open before setting the volume of the package (100; 400), for example by an opening (7c; 28'c , 28 "c) made on the furthest part of the panels (1,2; 8,11; 16,18; 25,27) over the entire length of the film in the longitudinal direction relative to the tube (7; ).   5. Packaging (100, 400) from a blank (10, 40) according to one of claims 1 to 4, said package (100, 400) being set in volume from said blank (10, 40) and said packaging (100, 400) being capable of containing articles resting on the first portion (7a; 13a; 21a; 28a) of the film (7; 28).   6. Packaging (100, 400) from a blank (10, 40) according to one of claims 1 to 4, said package (100, 400) being set in volume from said blank (10, 40) and said packaging (100, 400) being capable of containing articles resting on the first portion (7a, 28a) of the film (7; 28), the second portion (7'b, 7 "b; 28'b, 28" b) film (7; 28) being capable of covering and possibly holding in position at least a portion of said articles.