EP1188676A1 - Assembly of blanks, method and device for packaging an article or a group of articles of indefinite volume - Google Patents

Abstract

The box consists of a base, at least four side walls (3, 4, 5, 6), and a sheet (13) of a heat-shrinkable plastic film which is folded over the articles in the box and then shrunk to keep them in position. The box has an inner panel (14) with a central fold line which is inserted into the box to hold the plastic film sheet against the inner surface of the base. The film sheet is rectangular in shape and in one piece, projecting from both sides of the inner panel by a sufficient amount to allow it to cover any articles placed in the box before undergoing heat-shrinkage. The inner panel is of corrugated cardboard and has lugs along its edges which engage with slots along the lower edges of the box.

Description

The present invention relates to a packaging of the cardboard box type provided with a shrink film which is integral with it, intended for packaging articles intended to be delivered in number or in variable volume.

It also relates to a set of blanks to obtain such packaging.

It also relates to a method and a device for formation of a type of packaging packaging cardboard box with shrink film.

It finds a particularly application important although not exclusive in the field of transport of heavy objects, i.e. of weight more than one kilogram, for example three kg and irregular shape.

Such conditioning is also particularly suitable for objects such as boxes, bottles, medicines or various documents taken in groups or individually in the same package particularly intended for the delivery of a retailer such as bookseller, pharmacist and more usually retail.

We know that wholesalers, to prepare the order for their retailers, have need to package lots of items by nature different in packaging which must nevertheless bear transport and delivery conditions difficult.

Given the cost of standard cases, it is quickly became difficult to use such packaging to package lots of items from this nature, because this would imply using scales packaging whose storage would be costly and by therefore unsuitable for this form of distribution.

We already know many solutions to this type of problems.

It has thus been proposed for a long time to condition batches of articles within a box or a container, in particular of cardboard, covered by a plastic sheet heat shrinkable linked to the internal face of the bottom of the body and / or the internal face of the two walls opposite verticals.

In this way, it suffices to have inside a cardboard background the objects to wrap, then cover them with foil plastic that we will finally fully retract on products by passage through a heating tunnel for example, with the consequence of maintaining said products securely stowed at the checkout transport.

Such solutions are normally very advantageous since they only require one case of a minimum volume of cardboard providing substantial material savings obvious savings in packaging storage become unique.

In this sense we know (FR-2,426,620) a packaging in which two sheets are used plastics overlapping by one of their ends above the load in order to be welded to it hot at the overlap area, the other of their ends which is not in contact with the load being glued to the inner face of the bottom or near the bottom on the inside of a side wall of a cardboard box obtained from of a simple blank forming the bottom of the box from which extend two side faces coming fall back on the load before fold down the two plastic sheets that will come by welding maintain the assembly.

However, this particular packaging suffers from lack of mechanical strength of the assembly. Indeed, the conditioning is linked to takeoff resistance or tearing off the plastic sheet bonds with the bottom or the side walls of the body cardboard. We know that such packaging is subject to heavy stress during the handling and transportation frequently leading to the rupture of plastic film bonds with the cardboard base.

In this respect other solutions have been proposed this time based on the observation that the resistance to take-off or lifting sheet heat shrinkable materials during handling and / or transport operations was improved when the bonding of materials heat shrinkable at the body was carried out at the outside of the body on at least one side external (bottom or side wall) thereof, the face field, which is covered by the material shrinkable sheet, acting as a means opposing the stresses exerted by the weight of load.

In this sense, several solutions have already been proposed.

French patent FR-A-2,593,781 describes a packing box consisting of a case by example of cardboard and heat shrinkable material in sheets for packaging and holding in place of a charge. The heat shrinkable material leaf is linked by at least one of its borders to the external surface of a wall of the case in the vicinity of the edge of said wall, and is developed at the exterior from said edge towards the edge of said wall then inside the case in look at the internal surface of said wall while moving away from it towards the load to be packaged.

We find a similar solution in the patent French FR-A-2,589,444 according to which the sheets heat shrinkable are inserted between the faces internal walls and portions of these walls folded towards the inside of the body.

The latter solutions have the disadvantage of either to require a headdress in the first case, either originally provide for an expensive special cut in material and generating an additional cost in the management of stock of such packaging. In addition, these solutions are mechanically more complicated because they require two complicated plastic sheets substantially the assembly operations.

Another solution has been proposed, which describes a American box or similar using film in heat-shrinkable plastic secured to the bottom from the cash register.

The plastic film is pinched between the external flaps adjoining two parallel walls of the body and constituting the fund itself the packaging, and the internal flaps, adjoining the two other walls and doubling the bottom internally.

The latter solution has the advantage of being able be mechanized relatively easily since the heat shrink film can be inserted so continues from a coil and further the solution requires no bonding of said film to bottom of the box, thus overcoming the disadvantages supra.

However, this other solution is not satisfactory since it is only adaptable to full bottom American crates, excluding by example of boxes with reduced flaps but also trays with external glued corners or interiors or even American checkouts joined together, closed by a independent glued cover.

We also know (FR 2 659 292) a case of cardboard packaging for the transport of a load, comprising a series of flaps forming the side walls of the body, connected two by two by first parallel junction lines to the others, the series of shutters comprising two series of two main components opposite two by two, and one first set of side flaps arranged with a dimensioned and connected to the main components by second junction lines, perpendicular to first junction lines, and comprising at least first two opposite flaps forming at least in part of the bottom of the box.

The case also includes a film of material heat shrinkable plastic for packaging and keeping the load in place, and the means fixing of the film on the bottom of the body.

Again, such a fund suffers from disadvantages due to the risks of grubbing up such as described above.

Document DE-U-81 5943 describes a packaging box with one or more rigid stepped plates inserted into a tube heat shrinkable plastic material.

The plates are hardly introduced into the tube and such a case authorizes transport only small items such as nails or medicines, or even weak textile articles weights like shirts.

Finally, it is also known (FR 2 661 392) a body with plastic film and shim for holding the film on the bottom of the body, the wedge having side wings provided with self-locking means on the side.

Such a box is difficult to achieve because friction inherent in its mounting and presents fragile locking that does not exclude lifting during shocks.

We also know (US-A-5 323 896) a case with tube-shaped film and foldable plate, complicated to implement.

Also documents FR-A-2,661,392 and US-A-3 586,233 describe blanks and processes with cutouts having wings or flaps improving strength wrapping or keeping the film but insufficient.

We also know (US-A-5-323 896; FR-A-2-661-392 ; US-A-3.586-233) boxes and blanks with plastic sheet which nevertheless have mounting difficulties.

The present invention aims to provide a case responding better than that previously known to requirements of the practice, particularly in that it allows the plastic film to be fixed relative to a bottom of body which is itself firmly maintained and strong enough to transport of a load in complete safety thus overcoming the various disadvantages of art solutions prior.

To this end, the invention notably proposes a cardboard packaging box for transport a load, including a bottom, at least four side walls, namely the first two walls opposite and two second opposite walls, a film in heat-shrinkable plastic material intended for packing and keeping the load in place and means for fixing said film to the bottom of the body with a horizontal attached plate, for flattening and keeping the film flat heat shrink on the inside of the bottom of the body according to claim 1.

By middle or substantially fold line median, you should hear a line parallel to the two second opposite walls of the body, which is centered with respect to the plate of which it constitutes for example an axis of symmetry or even located from either side of this axis of symmetry at a distance less than or equal to a quarter of the dimension transverse of the plate, for example between the eighth and tenth.

The plate according to the invention is therefore formed of two portions of plates linked together by a fold line.

Such a solution has many advantages compared to the teachings of the prior art in to the extent that it allows to equip so really efficient the box forming the receptacle of a heat shrink film intended to wrap a any load without risking the problems of detachment or lifting during handling or shocks during transport.

The presence of the fold line will allow a easy insertion of the plate during assembly, authorizing assembly rates higher than this which is permitted with the boxes of the prior art.

In an advantageous embodiment of the invention the film is in the shape of a curtain rectangular heat shrinkable plastic in one piece, escaping on either side of two opposite edges opposite said plate parallel to the center line of the fold, and extending from said edges over a length sufficient to overlap one another enveloping said load and blocking it by thermal shrinkage of the film.

This solution fits well here again with a continuous manufacturing insofar as we use a shrink film in one piece, since just provide, in addition to a film reel heat shrinkable, flat elements that when the time comes, cut to the dimensions of the bottom of the tray, crate or other container containing compact corrugated cardboard or other sheet material, the editing of the film is then done simply by insertion between two opposite side walls of the container to equip.

According to another important characteristic of the invention, the plate which will constitute a double bottom for the container is obtained from a blank of corrugated cardboard, the direction of the grooves will be oriented as will be explained later.

• la plaque est insérée entre les deux seconds volets principaux opposés de sorte que les bords de la plaque soient en contact via le film en matériau plastique avec au moins une partie des bords inférieurs internes de la caisse, au bas desdites secondes parois;
• la plaque s'insère en force entre lesdits bords inférieurs internes de la caisse, au bas desdites secondes parois;
• la plaque comporte sur au moins un de ses deux bords opposés situé du coté des seconds volets, au moins un tenon, ledit tenon collaborant avec un évidement correspondant réalisé au niveau du bord inférieur interne de la caisse au bas desdits seconds volets correspondants, une fois la plaque en place contre le fond de la caisse;
• la plaque est en carton ondulé dont le sens des cannelures est perpendiculaire aux lignes de contact avec les secondes parois principales entre lesquelles ladite plaque est insérée;
• la face inférieure de la plaque est au moins en partie directement collée à la face supérieure du fond de la caisse, au travers d'au moins une partie évidée du film en matériau thermorétractable qui est d'un seul tenant;

In advantageous embodiments, one and / or the other of the following arrangements are also used:

• the plate is inserted between the two second opposite main flaps so that the edges of the plate are in contact via the plastic film with at least part of the internal lower edges of the body, at the bottom of said second walls;
• the plate is inserted by force between said internal lower edges of the body, at the bottom of said second walls;
• the plate comprises on at least one of its two opposite edges situated on the side of the second flaps, at least one stud, said stud collaborating with a corresponding recess produced at the internal lower edge of the body at the bottom of said second corresponding flaps, once the plate in place against the bottom of the box;
• the plate is made of corrugated cardboard, the direction of the grooves is perpendicular to the lines of contact with the second main walls between which said plate is inserted;
• the underside of the plate is at least partly directly bonded to the upper face of the bottom of the box, through at least one hollowed out part of the film of heat-shrinkable material which is in one piece;

• la plaque recouvre totalement le fond de la caisse pour constituer un double fond;
• la plaque comporte des moyens d'arrachage de ladite plaque par rapport au fond, permettant une désolidarisation manuelle entre les parties en carton et libérant le matériau plastique;
• la caisse comporte une suite de volets formant les parois latérales de la caisse, reliés deux à deux par des premières lignes de jonction parallèles les unes aux autres, ladite suite de volets comportant deux séries de deux volets principaux opposés deux à deux, et un premier ensemble de rabats latéraux disposés d'un coté et reliés aux volets principaux par des deuxièmes lignes de jonction perpendiculaires aux premières lignes de jonction, et comprenant au moins deux premiers rabats opposés formant au moins en partie le fond de la caisse, les deux premiers rabats comprenant chacun respectivement sur leurs deux cotés latéraux des pattes de renfort rabattues et collées sur la face externe des volets principaux, dits seconds volets principaux, correspondant aux secondes parois adjacentes aux volets principaux correspondant auxdits premiers rabats, dits premiers volets principaux et correspondant auxdites premières parois;
• l'ensemble de rabats latéraux comprend des seconds rabats opposés reliés aux seconds volets principaux par des deuxièmes lignes de jonction;
• les seconds rabats sont rabattus à 180° autour de leur deuxièmes lignes de jonction et collés sur la face interne du second volet principal correspondant;
• les tenons comportent une périphérie présentant deux paliers successifs et les évidements sont constitués par des rainures de forme complémentaire aux tenons traversant successivement de part en part les deuxièmes rabats et deuxièmes volets correspondants dans le sens de l'épaisseur;
• les premiers rabats sont jointifs à leurs extrémités opposées aux deuxièmes lignes de jonction avec les premiers volets;
• la plaque comporte deux troisièmes rabats opposés d'extrémité reliées à celle-ci par des troisièmes lignes de jonction, coïncidant avec les premières lignes de jonction entre premiers volets et premiers rabats, lesdits troisièmes rabats étant plaqués et collés sur la face intérieure desdits premiers volets en vis-à-vis;
• la suite de volets est terminée par une languette de fixation,
     lesdites deuxièmes lignes de jonction sont alignées ou sensiblement alignées et la caisse est agencée pour être montée automatiquement par rabattement desdits volets et des rabats dudit premier ensemble autour d'un mandrin, le volet d'extrémité de la suite de volets et la languette d'une part, et les pattes des premiers rabats et la face externe des second volets adjacents d'autre part, étant fixés entre eux par collage pour former la caisse;
• la suite comporte huit volets, à savoir quatre volets principaux séparés deux à deux par quatre volets intermédiaires.

In this way the separation between cardboard elements and plastic material is easy, the plastic film not being glued with the cardboard;

• the plate completely covers the bottom of the box to form a double bottom;
• the plate includes means for tearing off said plate relative to the bottom, allowing manual separation between the cardboard parts and releasing the plastic material;
• the box comprises a series of flaps forming the side walls of the box, connected two by two by first junction lines parallel to each other, said series of flaps comprising two series of two main flaps opposite two by two, and a first set of lateral flaps arranged on one side and connected to the main flaps by second junction lines perpendicular to the first junction lines, and comprising at least two opposite first flaps forming at least partially the bottom of the box, the first two flaps each comprising respectively on their two lateral sides of the folded reinforcement tabs and glued to the external face of the main flaps, called second main flaps, corresponding to the second walls adjacent to the main flaps corresponding to said first flaps, said first main flaps and corresponding to said first walls ;
• the set of side flaps comprises second opposite flaps connected to the second main flaps by second junction lines;
• the second flaps are folded 180 ° around their second junction lines and glued to the internal face of the corresponding second main flap;
• the studs have a periphery having two successive bearings and the recesses are formed by grooves of complementary shape to the studs successively passing right through the second flaps and corresponding second flaps in the thickness direction;
• the first flaps are joined at their ends opposite the second lines of junction with the first flaps;
• the plate comprises two third opposite end flaps connected to the latter by third junction lines, coinciding with the first junction lines between first flaps and first flaps, said third flaps being pressed and glued to the inner face of said first flaps opposite;
• the series of shutters is terminated by a fixing tab,
  said second junction lines are aligned or substantially aligned and the body is arranged to be mounted automatically by folding down said flaps and flaps of said first set around a mandrel, the end flap of the series of flaps and the tongue of on the one hand, and the tabs of the first flaps and the external face of the second adjacent flaps on the other hand, being fixed to each other by gluing to form the box;
• the suite has eight parts, namely four main parts separated two by two by four intermediate parts.

It goes without saying that the embodiments more particularly described here which are half boxes, are intended to constitute boxes according to the invention and to do this include covers known per se, for example made up by flaps connected to the walls by lines of folding or by a cover in the form of plate connected or not connected by a fold line to a wall.

The present invention also provides a set of blanks for making a case of the type described above.

en ce que les deux premiers rabats comprennent chacun respectivement sur leurs deux cotés latéraux des pattes de renfort agencées pour être rabattues et collées sur la face externe des volets principaux, dits seconds volets principaux, adjacents aux volets principaux correspondant auxdits premiers rabats une fois la caisse formée,

en ce que les secondes lignes de jonction avec les seconds volets principaux comportent chacune au moins un évidement

et en ce que ledit ensemble comporte un deuxième flan en forme de plaque sensiblement rectangulaire munie sur ses bords longitudinaux d'au moins un tenon propre à coopérer avec ledit évidement et sur chacun de ses bords transversaux d'une languette propre à coopérer avec la face interne d'un premier volet une fois la caisse formée, ladite plaque comportant une ligne médiane ou sensiblement médiane de pliage-longitudinal de la plaque en chapeau chinois parallèle aux bords longitudinaux de ladite plaque.

It also offers a set of blanks for the production of a packing box comprising a first blank comprising a series of flaps suitable for forming the side walls of the box, linked in pairs by first junction lines parallel to each other. others, said series of flaps being terminated by a bonding tab and comprising two series of two main flaps, and a first set of lateral flaps arranged on one side and connected to the main flaps by second junction lines, perpendicular to the first lines junction, namely two first flaps and two second flaps intended to form the bottom of the body, characterized

in that the first two flaps each comprise respectively on their two lateral sides reinforcement tabs arranged to be folded down and glued to the external face of the main flaps, called second main flaps, adjacent to the main flaps corresponding to said first flaps once the box formed,

in that the second junction lines with the second main flaps each have at least one recess

and in that said assembly comprises a second blank in the form of a substantially rectangular plate provided on its longitudinal edges with at least one stud capable of cooperating with said recess and on each of its transverse edges with a tab capable of cooperating with the face internal of a first flap once the body formed, said plate comprising a median or substantially median line of longitudinal-folding of the plate in Chinese hat parallel to the longitudinal edges of said plate.

Advantageously, the plate comprises means for tearing of said plate by traction.

The invention also provides a training method a cardboard or similar packing case for transporting a load, as described above.

on forme le fond et les parois verticales d'une caisse qu'on laisse ouverte sur le dessus,

on présente une plaque de dimensions longitudinales sensiblement égales à celles du fond, ladite plaque comprenant une ligne médiane ou sensiblement médiane de pliage parallèle à ses cotés longitudinaux qui sont propres à coopérer avec deux parois verticales opposées de la caisse, dites secondes parois,

on plie la plaque sous forme de chapeau chinois autour de ladite ligne de pliage, ladite plaque étant placée au-dessus d'une feuille de matériau plastique agencée pour laisser s'échapper de part et d'autre des deux bords opposés en vis à vis de la plaque, des portions de rideau de matière libre s'étendant depuis lesdits bords sur une longueur suffisante pour se recouvrir l'une l'autre en enveloppant totalement la charge et bloquer ladite charge par rétraction thermique du film,

on introduit la feuille en matériau plastique et la plaque en chapeau chinois dans la caisse jusqu'à venir en position de blocage de ladite feuille entre plaque et fond par mise à l'horizontal de la plaque en butée contre le fond de la caisse,

on introduit la charge sur la plaque dans la caisse et on referme les portions de rideau sur la charge avant blocage par rétraction thermique et fermeture du couvercle de la caisse.

The invention also proposes a method for forming a corrugated cardboard box or the like for transporting a load, comprising the following steps:

we form the bottom and the vertical walls of a box which we leave open on top,

there is a plate of longitudinal dimensions substantially equal to those of the bottom, said plate comprising a median or substantially median fold line parallel to its longitudinal sides which are adapted to cooperate with two opposite vertical walls of the body, called second walls,

the plate is folded in the form of a Chinese hat around said fold line, said plate being placed above a sheet of plastic material arranged to let escape on either side of the two opposite edges opposite of the plate, curtain portions of free material extending from said edges over a length sufficient to cover each other by completely enveloping the load and blocking said load by thermal shrinkage of the film,

the plastic sheet and the Chinese hat plate are introduced into the box until it comes to the blocking position of said sheet between plate and bottom by placing the plate in abutment against the bottom of the box,

the load is introduced on the plate in the box and the curtain portions are closed on the load before blocking by thermal retraction and closing of the box cover.

Advantageously, the sheet of plastic material comprising at least one openwork part, the underside of the plate or the inner face of the bottom is previously glued opposite the part perforated, and the plate is stuck on the bottom at across the said perforated part during the setting the horizontal of the plate in abutment against the bottom.

Also advantageously, the plate comprising two side flaps, called third clean flaps to be clad on two opposite opposite walls of the box perpendicular to the fold line of the plate, we fold said third flaps against the upper face of the plate before introduction of the plate in the box and we glue the faces of plating of said third flaps then, after introduction of the plate in the box we put said faces under pressure for bonding against walls by automatic straightening of the third flaps when plating the plate on the bottom.

In another advantageous embodiment, forms the bottom and walls of the body around a mandrel.

Advantageously, the bottom of the box comprising first two flaps and two second flaps, one flap the second flaps at 180 ° around their lines of junction with the walls and we stick them on the face internal of the adjacent walls.

Also advantageously, the plastic sheet is introduced into the body in an offset manner in time and space in relation to the plate, that is to say not simultaneously with the plate, before the latter, being shaped like a funnel or hollow compared to the opening of the box, which allows its introduction without injury or risk of annoying friction.

des moyens de formation du fond et des parois verticales de la caisse,

des moyens de présentation d'un film en matériau plastique au dessus de ladite caisse,

des moyens de présentation d'une plaque préalablement pliée en forme de chapeau chinois autour d'une ligne de pliage longitudinale de ladite plaque au dessus dudit film et

des moyens d'introduction du film dans la caisse et d'introduction de la plaque en chapeau chinois dans ladite caisse, lesdits moyens étant propres à plaquer ladite plaque en appuyant dessus, jusqu'à plaquer le film thermorétractable sur la face interne du fond de la caisse en laissant s'échapper de part et d'autre de deux bords opposés en vis à vis de ladite plaque, des portions de rideau de matière libre s'étendant depuis lesdits bords sur une longueur suffisante pour se recouvrir l'une l'autre dans un deuxième temps en enveloppant totalement la charge.

The invention also provides a device for manufacturing a cardboard packaging box or the like for transporting a load, said box comprising a lateral belt formed by at least four vertical walls and a horizontal bottom secured to said belt via junction lines, and a heat-shrinkable plastic film material intended for packaging and keeping said load in place,
characterized in that it includes

means for forming the bottom and the vertical walls of the box,

means for presenting a plastic film above said box,

means for presenting a plate previously folded in the form of a Chinese hat around a longitudinal fold line of said plate above said film and

means for introducing the film into the box and for introducing the Chinese hat plate into said box, said means being suitable for pressing said plate by pressing on it, until pressing the heat-shrinkable film on the internal face of the bottom of the the body by letting escape on either side of two opposite edges opposite said plate, curtain portions of free material extending from said edges over a length sufficient to cover one another in a second step by completely enveloping the load.

Advantageously, the device comprises means cutting at least one orifice in the film in plastic material and glue from the bottom of the body opposite said orifice after introduction film in the box.

Also advantageously the device comprises more means of introducing the load into the body, means for folding down the portions of curtain over the load and means of heating the film for thermal shrinkage on the load.

Other advantages and features will emerge better from the description of several embodiments of the body, all of blanks, the method and the device in accordance with the invention, given without limitation.

• Les figures 1 à 8 sont des vues en perspective montrant les différentes étapes constitutives d'une caisse conforme à une première variante de l'invention.
• La figure 9 est une vue en plan du flan permettant de monter la demi-caisse de la figure 1.
• La figure 9A est une vue en plan de la plaque rapportée du type de celle de la figure 2, avec bande d'arrachage,
• La figure 10 est une vue en plan, partielle, d'un flan constitutif de demi-caisse selon un autre mode de réalisation de l'invention, avec languette sur coins coupés.
• La figure 11 est une caisse obtenue avec le flan de la figure 10, fermée par un couvercle.
• La figure 12 montre un autre mode de réalisation de la plaque rapportée utilisée selon l'invention, avec zone frangible d'arrachage en croix.
• Les figures 13 et 14 montrent un autre mode de réalisation d'une caisse selon l'invention, à quatre volets, avec formation autour d'un mandrin.
• La figure 15 montre une vue en perspective éclatée de la jonction entre plaque et second volet, d'un ensemble destiné à former une demi-caisse selon le mode de réalisation de l'invention de la figure 1.
• La figure 16 est une vue en coupe selon VIII-VIII de la figure 15.
• Les figures 17 à 22 montrent schématiquement un dispositif selon un mode de réalisation de l'invention au cours des différentes étapes de formation d'une caisse selon un mode de réalisation de l'invention.

The description refers to the accompanying drawings in which:

• Figures 1 to 8 are perspective views showing the different stages of a box according to a first variant of the invention.
• FIG. 9 is a plan view of the blank for mounting the half-body of FIG. 1.
• FIG. 9A is a plan view of the attached plate of the type of that of FIG. 2, with tear strip,
• FIG. 10 is a partial plan view of a blank constituting a half-box according to another embodiment of the invention, with a tongue on cut corners.
• Figure 11 is a box obtained with the blank of Figure 10, closed by a cover.
• FIG. 12 shows another embodiment of the insert plate used according to the invention, with a frangible tear-off zone in the form of a cross.
• Figures 13 and 14 show another embodiment of a box according to the invention, with four components, with formation around a mandrel.
• FIG. 15 shows an exploded perspective view of the junction between plate and second flap, of an assembly intended to form a half-box according to the embodiment of the invention of FIG. 1.
• FIG. 16 is a sectional view along VIII-VIII of FIG. 15.
• Figures 17 to 22 schematically show a device according to an embodiment of the invention during the different stages of forming a box according to an embodiment of the invention.

Figures 23 to 28 are perspective views showing the different stages of a body according to another variant of the invention.

Figure 1 shows a half-body 1 for the conditioning of a load, comprising a series of flaps forming the side walls of the body, linked in pairs by the first lines of junction 2, parallel to each other.

The strand suite has two first strands main opposites 3 and 5, and two second parts main opposites 4 and 6, the main flaps being separated by intermediate flaps 7, forming cut corners of the body.

The first sections 3 and 5 include the first flaps 8, connected to the bottom of said first flaps by second perpendicular junction lines 9 at the first junction lines 2.

According to one embodiment of the invention, the first two flaps each include respectively on their two lateral sides of reinforcement tabs folded down and glued to the face external of the second main components 4 and 6.

The first two flaps are joined at the level of their ends located on the side opposite the lines folding 9 between first flaps and first flaps.

The tabs 10 are also contiguous to their ends and extend all along the first flap facing the second flap corresponding.

The second main components 3 and 5 include meanwhile in the lower part of the second flaps 11 connected to said flaps by second or second 9 'junction lines.

The second flaps are folded 180 ° by compared to the 9 'junction lines and glued on the internal face of said second flaps 4 and 6.

Figures 2 to 8 show in perspective the successive stages of the fund's creation cardboard packaging according to the method of embodiment of the invention more particularly described here.

After gluing in 12 of the upper face of the bottom of the body, i.e. the inside of the first flaps 8, on a central surface of determined area, place above the half-box 1 sheet of plastic material film 13 heat-shrinkable, comprising an openwork part 13 ' central, slightly larger in area than the central surface and arranged to be opposite gluing lines or points 12 'from the face internal bottom.

The glue 12 facing the openwork part can also and advantageously be done on the underside of the plate.

The plastic film 13 is cut to form a substantially rectangular sheet and has dimensions which will be specified below.

There is also an added plate 14 double-sided corrugated cardboard, the lines of groove are arranged perpendicular to the second parts 4 and 6.

The plate is of the same shape and substantially of same dimensions as the bottom of the half-body 1, and has a longitudinal line right through folding 16, for example of symmetry of the plate.

The fold line 16 is arranged to allow a folding down of the two side panels 17 of the plaque.

It can also be offset, its purpose being allow the Chinese hat to be folded plate, as shown in Figure 3, and allow its introduction without friction to inside the half-body 1 for example in loading the plastic material film.

The plate also includes thirds flaps 18, rectangular, opposite, at the ends, connected to the plate by third lines of junction 19 arranged to coincide with first lines of junction between the first shutters and the first flaps.

These third flaps 18 are folded towards inside the plate, which will allow them to keep towards the inside of the plate when the introduction of the latter in the half-body 1.

The plate also has four tenons 20 located respectively two by two and symmetrically relative to the fold line 16 on its edges opposite longitudinal 21, perpendicular to third junction lines 19.

The pins 20 are for example of shape trapezoidal, rectangular or stepped and are arranged to cooperate with recesses 22 located on the lower internal edge of the body at the bottom of the second flaps 4, 6, that is to say coinciding with part with the second fold lines 9 'between second flaps and second flaps.

Each recess is made straddling the second corresponding fold line while sparing, according to the embodiment of the invention more particularly described here, a hollowed out part of on either side of said slit line of thickness equal to that of the plate 14.

After shaping the Chinese hat of the plate 14, the latter is therefore introduced in loading the sheet of thermoplastic material 13 down.

As shown in Figure 4, the sheet of material thermoplastic has curtain 23 portions of free material extending from opposite edges 21 of the plate provided with tenons 20 over a length sufficient to initially fall back to the outside of the half-body above the walls formed by the second flaps 4 and 6 when the plastic sheet is pressed on the bottom of the half-body (Cf. figure 4), and in a second time, overlap each other by encompassing fully charge and block said charge 24 by thermal shrinkage of the film 13 (see FIGS. 5 and 6).

The plate 14 in Chinese hat is plated with bottom of the body, until it comes into position blocking of the sheet between plate and bottom, by placing horizontally of said plate in abutment, against the bottom of the body, the tenons 20 snapping into the recesses 22 by trapping the film of material plastic in said snaps.

The plastic film repelled by the end of the is also protected from contact outside thanks to the external legs 10 located in opposite the recesses of the fold lines 9 ' between second flaps and second flaps.

When the plate 14 is returned to the horizontal, the third flaps 18 straighten up and, having been previously glued, come naturally stick under pressure on the internal bases of first sections 3 and 5, consolidating the entire fixing the plastic film on the bottom of the box.

The packaging is then finished (see Figures 7 and 8) by adding a cover 25 constituted so known in itself by a central flap 26 of form and of dimensions identical to those of section horizontal of the body, said central flap having rectangular side flaps 27 arranged to adhere to the upper part of the external face of the main shutters corresponding, and small end tabs 28 arranged to stick to the external face intermediate flaps 7 of the body.

Finally, to facilitate the implementation of the box and possibly allow its stacking more easy, nipples 30 on the upper edge 31 of second main components 4 and 6 are planned, at which case of the additional recesses are for example plumb on the bottom of the body.

Slot-shaped recesses 32 are elsewhere made on the cover 25 at the fold lines 33 between the main flap 26 and the side flaps 27 corresponding to the edges upper ones fitted with nipples 30 of the half-body.

Figures 9 and 9A show the blank assembly for the realization of the half-packing box described with reference to Figures 1 to 8.

The assembly includes a first blank 40 consisting a series of shutters 41 linked in pairs by first fold or join lines 42, parallel to each other, said series of shutters being terminated by a bonding tab 43 and comprising two series of main components, know a first series of so-called first shutters flaps 44 and 46 and a second series of so-called flaps second parts 45 and 47.

The main components are also separated and / or completed if necessary, by shutters intermediaries 48 capable of forming the cut corners from the cash register.

The blank has a first set of flaps sides arranged on one side and connected to the flaps main by second fold lines 49 and 49 'aligned or substantially aligned with each other the others, namely the first two flaps 50 connected with the first flaps 44 and 46 and two second flaps 51 substantially rectangular connected to the two second parts 45 and 47.

More precisely the first flaps have a shape substantially rectangular comprising near second junction lines 49 a part at an angle to 45 ° extending outward from seconds junction lines, then a parallel straight section at the first fold lines 42.

According to the embodiment of the invention more particularly described here, the first flaps each have respectively on the part of their two lateral sides parallel to the first fold lines 42, reinforcement tabs 52 connected to said flaps by fold lines 53 and arranged to be folded down and glued to the outside of the second main flaps 45 and 47 adjacent around said fold lines, which are simple.

In one embodiment, the lines 53 are doubles.

The second flaps 51 are in turn connected to the second sections 45 and 47 with second lines of folding 49 ', which are, as indicated above, aligned or roughly aligned with the seconds junction lines 49 between the first flaps and first parts. The second flaps have sides of shape complementary to the first flaps, for optimize the use of cardboard.

Lines 49 ′ are for example double in the particularly in the case of thick corrugated cardboard, so as to allow the folding of the seconds to 180 ° flaps 51 on the internal faces of the future half-body.

Second junction or fold lines 49 ' include for each flap 51, two recesses 54 slit-shaped, for example 3 cm long and width of two or more plate thicknesses.

For example and more specifically, the recess includes a first width slot portion equal to an added plate thickness, hollowed out in the second strand along the first line of the double fold line 49 ', and a second part slit width also equal to that of the plate, hollowed out in the second adjacent flap, along of the second fold line of the double line.

FIG. 9A shows a plate 55 provided with a flap central 56 of octagonal shape identical to that from the bottom of the half-body made with the blank 40, comprising on its two longitudinal edges 57 tenons 58 arranged to cooperate with the recesses 54.

On its two other opposite sides, the plate includes respectively two third flaps 59 rectangular connected to the central flap by third junction lines 60.

The plate also has a fold line central 61 combined with the axis of symmetry longitudinal of the plate.

Finally, the plate has a double strip tear 62 (for example a strip of material plastic inserted in the carton), that the user can enter, for example, through hole 63 provided for this effect.

By pulling on each side, it is possible to release and tear off the rest of the plate when subsequent destruction of the packaging, such provision allowing in particular, for reasons ecological, to separate cardboard waste, plastic waste.

Figure 10 shows another embodiment of blank 66, with eight flaps.

The blank 66 has tabs 67 on the ends of the intermediate flaps 68 forming the cut corners of the body 69 of FIG. 11.

Figure 12 shows another embodiment of a plate 70 according to the invention which here comprises third double junction lines 71 and lifting means 72 constituted in a known manner by itself by a central gripping orifice connected at the four corners of the plate by lines 73 frangible and / or precut, tearing off the plate.

FIGS. 13 and 14 show a mode of a four-sided 74 case by winding around a mandrel 75, from a blank 80 with four main flaps, and a set of four corresponding flaps, the second flaps being used in double plaiting.

More specifically, Figure 13 shows a blank 80 with two first main flaps 81 and two second main shutters 82, the first shutters main having first flaps 83 provided two side tabs 84 and the second flaps main 82 each comprising a second flap 85 provided with recesses 86 on the second line of junction 87, arranged to cooperate with the studs vis-à-vis the plate concerned, said seconds flaps 85 being folded over (arrow 88) and glued to the internal face of the second flaps 82.

The assembly thus formed as shown in the Figure 13, the first flaps being flat in the extension of the first components and the second flaps having been previously folded and glued on the inner face of the second flaps, the blank is wrapped (arrow 89, figure 14) around the mandrel to form the half-body using for example the process and apparatus described in patent FR 90 09,457.

Figure 15 shows in exploded view and in section the detail of the locking of the plate 14 according to the embodiment of the invention of FIGS. 1 to 8.

The plate 14 has here on each of its edges longitudinal 21, two tenons 20 called double bearing, namely a first bearing 20 'and a bearing 20 '' end.

On the side of the body wall, there is a first recess 22 'made above the second junction line 9 'in the second flap 11 padded, complementary to the first part of tenon forming the first bearing, and a second recess 22 '' of complementary shape and coming to cooperate with the second 20 '' bearing, the second recess being in the second flap 4 in opposite allowing penetration of the post on two cardboard wall thicknesses.

In Figure 16 we see that the double overcome allows to penetrate deep into the wall of the body, the tabs 10 for overflowing the first flaps, glued to the outside of the second flap 4 to protect the recesses thus produced and the film wedged between plate and wall (not shown).

FIG. 17 shows a device 100 for manufacture of a cardboard packaging case or the like for transporting a load, said body being formed from a half body 101 comprising a side belt 102 formed of minus four vertical walls and a bottom horizontal 103 secured to said belt by junction lines 104 and a film 105 of material heat shrinkable plastic for packaging and keeping the load in place.

The device includes means (not shown) of formation of the bottom and walls vertical of the body, for example comprising a chuck as shown in Figures 13 and 14, means 106 for bringing the half-body into position positioning of the plate for example comprising a treadmill 107 in noria, with stop 108 of maintenance of the body, and means 109 (Cf. figure 22) recovery of the half-body fitted with its film in plastic material to the filling station of the charge (not shown).

The device 100 includes means 111 for presentation of the plastic film 105 above of the cash register for example through of rollers 113 pulling the film continuously above from the body and the means of cutting the film to dimensions and of the openwork part (not shown) known in themselves.

Means 114 for preparing the plate 115 according to the invention with vertical placement of third flaps 116 are provided.

They include cylinders 117 for straightening the third flaps 116, then folding towards the center of the plate, and of the gluing means (not shown) from above said third flaps.

The device (see Figures 19 and 20) includes means 118 of folding in Chinese hat, around a longitudinal fold line 119, of the plate, by example above the film.

The folding means 118 comprise for example (See figure 20) two rollers 120 and one against retractable 120 'roller.

Cylinders 121 mounted on carriage back and forth allow the positioning of the plate above the plastic film.

The device 100 includes means introduction 122 of the plate held in the cap Chinese for example embarking the film in the checkout.

In an advantageous embodiment, the device includes means (not shown) introduction of the plastic film separately from the plate, allowing the film to be placed in the box before the introduction of the hat plate Chinese.

The means of introduction, in particular of the plate for example comprise a piston 123, said means then being able to press the plate onto the bottom half-body 101, pressing it until pressurize the central part of the film heat shrinkable on the inside of the bottom letting the portions escape on both sides curtains 124 made of free plastic, extending from opposite edges of the plate on sufficient length to eventually exit from the cash register at first, and cover in a second time charges it by completely enveloping it.

Gluing means (not shown) are by elsewhere provided in the appropriate location by glue for example of the "Hot melt" type in language Anglo-Saxon, either from the lower surface of the plate, either from the bottom of the body, on the surface adequate.

Let us remember that advantageously the device includes cutting means (not shown) of at least one orifice in the film in plastic material, for fixing the face bottom of the plate on the bottom of the half-body vis-à-vis, through this orifice.

The device also includes means introduction 125 of the load into the known box in themselves, means (not shown) of folding down the curtain portions on the load and heating means, for example by moving in a heating tunnel, film, for retraction thermal on the load.

The packaging is then closed with a cover of the type described above in a manner known per se.

Advantageously in the case more particularly described here where the plate has thirds flaps, these can either be shaped and plated on the internal face of the corresponding flaps by simple natural straightening of said third flaps during vertical compression, and so flattening of the plate, and / or can be plated by push cylinders horizontal introduced in the front half-body removal of the vertical cylinder, piston type (not represented).

We will now describe a first mode of carrying out the process of placing the plate according to the invention with reference to FIGS. 1 to 8, and in Figures 17 to 22.

The half-box 1 or 101 is first formed, for example around a mandrel.

The film is cut, perforated, then placed on top of the half-body whose bottom has been previously glued.

The plate is then presented beforehand shaped like a Chinese hat, above the film plastic (see Figures 2 and 20), the plate being by example taken via suction cups (not shown) and place it on top of the sheet made of plastic.

Then we introduce the plate (figure 3) in Chinese hat in the box for example in loading the plastic sheet up come in sheet blocking position between plate and bottom by placing the plate horizontally in abutment and latching of the pins in the recesses provided for this purpose, the ends of curtain portions falling down then and for example at the exterior of the body above the walls.

They can also fall back inside but it then requires to remove them for introduce the load with spacer means, by example by suction or manually.

The third flaps are then glued to the internal faces of the first flaps, then we put in places the load.

We then close the curtain portions on the charge then the heat restriction of the whole and we just finish the packaging in fitting the cover as indicated above.

Figures 23 to 28 show a box 201 for the conditioning of a charge obtained from a tray comprising a bottom 202 and four side walls, namely the first two walls opposite 203 and two second opposite walls 204, one film 205 of heat-shrinkable plastic material, rectangular tablecloth, provided with an orifice 206, by example in the form of a rectangular and / or oval slot two to three centimeters wide and 5 to 10 cm long.

The body has an attached plate 207, rectangular, the same size as the section of the body, comprising a center line 208 of folding provisional longitudinal of the hat plate chinese, parallel to the second two walls 204 of the tray.

Chinese hat is folded at an angle sufficiently acute, for example less than 60 °, by example 40 ° or less, to leave on both sides from its edges 209 an empty space large enough to avoid damaging the plastic film 205, and allow movement of the lowering arm and film application on both sides of the plate in inverted V.

The case manufacturing process corresponding to Figures 23 to 28 will now be detailed further.

The tray 201 being formed, and the bottom 202 previously glued to the right of the slot 206, we brings and we conform the U or V plastic film below the open face of the tray (Cf. figure 24).

We lower the plastic film thus conformed to the bottom 202 of the tray.

Plate 207 shaped like a Chinese hat is then descended in turn, until its edges 209 abut on the plastic film against which they slide until the plate 207 is horizontal and comes to stick on the bottom 202 through hole 206.

The plastic film is then blocked on the bottom in being sandwiched between the bottom and the plate.

As it goes without saying and as it results from elsewhere of the above the present invention is not limited to more embodiments particularly described.

On the contrary, it embraces all variants especially those where the plate is devoid of third flap, the one where the second flaps are without second flaps, or those where the line median is replaced by two or three lines of parallel middle bends, fairly close together to conform the plate substantially in Chinese hat shape.

Claims (12)

Set of blanks for producing a packaging box comprising a first blank (40) comprising a series (41) of shutters suitable for forming the side walls of the box, linked in pairs by first junction lines (42 ) parallel to each other, said series of flaps being terminated by a bonding tab (43) and comprising two series of two main flaps, and a first set of side flaps arranged on one side and connected to the main flaps by second junction lines (9, 9 '; 49, 49'; 86), perpendicular to the first junction lines, namely two first flaps (8, 50, 83) and two second flaps (11, 85) intended to form the bottom of the body, characterized in that the first two flaps (8, 50, 83) each comprise respectively on their two lateral sides reinforcement tabs (52, 84) arranged to be folded down and glued to the external face of the main flaps, called second main flaps, adjacent to the main flaps corresponding to said first flaps once the box has been formed, characterized in that the second junction lines (9, 9 '; 49, 49'; 86) with the second main flaps each have at least one recess (54, 86) and in that said assembly comprises a second blank (55, 70) in the form of a substantially rectangular plate provided on its longitudinal edges with at least one stud (58) suitable for cooperating with said recess and on each of its transverse edges of a tongue (59) adapted to cooperate with the internal face of a first flap once the body is formed, said plate comprising a median line (16, 61) or substantially median of longitudinal folding of the plate in Chinese hat, parallel to the edges longitudinal (21, 57) of said plate. Assembly according to claim 1, characterized in that the plate (70) comprises means (73) for tearing said plate by traction. Method of forming a case (1, 101, 201) for packaging in cardboard or the like for transporting a load, in which forming the bottom (202) and the vertical walls (203, 204) of a box which is left open on top, there is a sheet (205) of plastic material arranged to let escape on either side of the two opposite edges opposite a plate (207), the said plate is presented with longitudinal dimensions substantially equal to those of the bottom, characterized in that said plate (207) comprising a median or substantially median line (208) of folding parallel to its longitudinal sides which are adapted to cooperate with two vertical walls (204) opposite the body, called second walls, the plate is folded in the form of a Chinese hat around said fold line (208), said plate being placed above a sheet of plastic material, the sheet (205) of plastic material and the Chinese hat plate are introduced into the box until it comes to the blocking position of said sheet between plate (207) and bottom (202) by placing the plate horizontally abutment against the bottom of the box, curtain portions (23) of free material extending from said edges over a length sufficient to, firstly fall back outside the box above the walls when the sheet in plastic material is pressed onto the bottom of the body, and in a second step cover each other by completely enveloping the load and blocking said load by thermal shrinkage of the film, the load is introduced (24) into the box and said curtain portions are closed on said load before blocking by thermal retraction and closing of the box cover. Method according to claim 3, characterized in that the sheet (205) of plastic material comprising at least one perforated part (206), the underside of the plate or the internal face of the bottom is previously glued facing the perforated part, and the plate (207) is glued to the bottom (202) through said perforated part (206) when the plate is brought into horizontal abutment against the bottom. Method according to any one of claims 3 and 4, characterized in that the plate comprising two lateral flaps (18), called third flaps suitable for being pressed against two opposite walls opposite the body perpendicular to the line of folding (16) of the plate (14), said third flaps (18) are folded against the upper face of the plate before introduction of the plate into the box and the plating faces of said third flaps are glued then, after introduction of the plate in the box, said faces are pressurized for bonding against the walls by automatic straightening of the third flaps when the plate is pressed against the bottom. Method of forming a box according to any one of Claims 3 to 5, characterized in that
the bottom and the walls of the box are formed around a mandrel. Method according to any one of Claims 3 to 6, characterized in that , the bottom of the box comprising two first flaps (83) and two second flaps (85), the second flaps (85) are folded 180 ° around their junction lines with the walls and they are glued to the internal face (82) of the adjacent walls. Device (100) for manufacturing a cardboard packaging box or the like for transporting a load, said box comprising a lateral belt (102) formed by at least four vertical walls and a horizontal bottom (103) secured to said belt via junction lines (104), and a heat shrinkable plastic film material (105) intended for packaging and holding said load in place, comprising means for forming the bottom and the vertical walls of the box, means (111) for presenting the film (105) of plastic material above said box, means (114) for presenting a plate above the body,
characterized in that it comprises means (118) for folding in the form of a Chinese hat around a fold line (119) longitudinal of said plate above said film and means (122) for introducing the film into the box and for introducing the Chinese hat plate into said box, said means being capable of pressing said plate by pressing on it, until pressing the heat-shrinkable film on the internal face from the bottom of the body while letting escape on either side of two opposite edges opposite said plate, curtain portions (124) of free material extending from said edges over a length sufficient to exit of the body initially and overlap each other in a second step by completely enveloping the load. Device according to claim 8,
characterized in that it comprises means for cutting at least one orifice in the plastic film and for gluing the underside of the plate or the bottom of the box opposite said orifice after introduction of said film into the box. Device according to any one of claims 8 and 9, characterized in that it further comprises means (125) for introducing the load into the body, means for folding down the curtain portions on the load and film heating means for thermal shrinkage on the load. Device according to any one of Claims 8 to 10, characterized in that
it comprises means for forming the bottom and the walls of the box around a mandrel. Device according to any one of Claims 8 to 11, characterized in that , the plate comprising third lateral flaps (18),
it comprises means for folding these flaps against the upper face of the plate and for gluing said third flaps.

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