FR2818616A1 - Tray for food or vegetables has sloping sides, shorter sides being higher than longer ones, and is produced from conventional blank, but made from fiber board covered on outside with paper or plastic rather than cardboard - Google Patents

Abstract

The tray for food or vegetables has sloping sides (3 - 6), the shorter sides (4, 6) being higher than the longer ones (3, 5). It is produced from a conventional blank, but made from fiber board covered on the outside with paper or plastic rather than cardboard. Chamfered grooves through the fiber board separate the sections of the blank, the paper or plastic acting as a hinge.

Description

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The present invention relates to a rectangular base package, without cover, made from a rigid panel (plywood, wood fiber etc ....), printed or coated on one side of a sheet of paper, pre-printed or not, and / or plastic film. The two short sides are usually higher than the long sides.

This type of packaging is intended for the packaging, storage and transport of fruits and vegetables to points of sale. It is commonly made of wood, by assembling wooden boards sawn or unwound, or free of wood; these materials are appreciated for their rigidity and their resistance in a humid environment. In order to obtain a packaging, heads (short sides) [one or more boards fixed by stapling on two triangular batten] are produced on the one hand, and on the other sides (long), sawn or peeled or made of wood fiber board. . Two short sides and two long sides are assembled by stapling to form a frame. A bottom is manufactured by assembling boards and battens or by cutting a fiberboard or plywood panel in the desired format. The bottom is fixed to the frame by "corner" stapling. This process is long, complex and expensive. The packages are delivered fully assembled, which generates high transport and storage costs.

This type of packaging is also made of corrugated or compact cardboard; in this case, the package consists of a "cut blank" and printed, with fold lines. It is delivered flat (economical transportation and storage) to the user. The latter has a machine that sets the volume of the blank and the assembly by gluing. The disadvantage is the degradation of the mechanical characteristics in a humid environment.

More recently, packaging made from wood fiber panels or any other rigid board, such as plywood, has been coated on one side with a paper sheet, or cardboard and / or plastic film. This type of packaging uses the known possibility of folding the panel as described above after having performed a milling which generates a charm between the bottom of the rectangular package and the four adjoining sides; these four sides, after folding to about 900, constitute a frame that is locked by a system of tenons and mortises. In addition to the difficulty of machining such a locking system leads, the packaging has a pyramidal shape that obeys the interior volume and hinders the automatic filling since the neckline is smaller than the dimensions of the bottom. Finally, the material yield is poor compared to conventional packaging because the four corners of the base blank are unused and the long sides, whose initial width is equal to the height of the short sides, are indented to create aeration of the product transported, this indentation constituting an additional waste.

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 The packaging according to the invention makes it possible to use this known ability to fold rigid panels, of wood fiber or other rigid material, previously coated with a sheet of paper, cardboard and / or plastic film, after having practiced a triangular groove, limited substantially to the thickness of the panel, without breaking the thickness of the paper coating or cardboard and / or plastic film. The originality lies in the use of this possibility of folding rigid panels, like a hinge connecting two adjacent panels, not only to connect a bottom and four sides, but also by connecting at the four corners the ends of the sides together by superimposing them, with a substantial saving of material.

e un rectangle central qui constitue le fond de l'emballage à obtenir . deux trapèzes qui constituent les côtés longs, attenants respectivement à l'un et l'autre des grands côtés du rectangle du fond, dont la longueur est sensiblement identique au grand côté du fond, et dont la hauteur est égale à la hauteur de ces côtés longs dans l'emballage à obtenir . deux rectangles qui constituent les côtés courts, attenants respectivement à l'un et l'autre des petits côtés du fond, de longueur sensiblement égale à ces côtés, et dont

la largeur est égale à la hauteur de l'emballage à obtenir . quatre parallélogrammes appelés rabats, attenants aux extrémités des côtés courts, dont un côté est sensiblement égal à la hauteur de l'emballage à obtenir et l'autre côté sensiblement égal à la largeur du côté long, utilisant ainsi la totalité de la sur- face du panneau initial Il est à remarquer que la hauteur des côtés longs est inférieure de 30 à 70mm à celle des côtés

courts, d'où l'économie de matière par rapport à d'autres modèles dont les côtés longs sont découpés dans des rectangles dont la largeur est égale à la hauteur des côtés courts. Une rainure est fraisée suivant les quatre côtés du rectangle délimitant le fond. La fraise est à section triangulaire isocèle dont l'angle au sommet est sensiblement le complément de l'angle souhaité entre les panneaux après pliage-environ 90 -. Une rainure de même section est fraisée entre les petits côtés et leur prolongement, que nous appelons rabats, parallèlement aux petits côtés du fond. La distance entre ces deux fraisages est égale à la largeur du fond, augmentée ou diminuée, de part et d'autre de la charnière entre fond et côtés longs, de The packaging consists of a rectangular panel of wood fiber or plywood, coated on the so-called outer face of the future packaging, or a sheet of paper, printed or not, and whether or not a transparent plastic film, or it is printed and protected by a glued plastic film. The panel is cut by any appropriate means to obtain:

e a central rectangle which constitutes the bottom of the package to obtain. two trapeziums which constitute the long sides, respectively adjacent to one and the other of the long sides of the rectangle of the bottom, whose length is substantially identical to the long side of the bottom, and whose height is equal to the height of these sides long in the package to get. two rectangles which constitute the short sides, adjoining respectively to the one and the other of the short sides of the bottom, of length substantially equal to these sides, and of which

the width is equal to the height of the package to obtain. four parallelograms called flaps, adjoining the ends of the short sides, one side of which is substantially equal to the height of the package to be obtained and the other side substantially equal to the width of the long side, thus using the entire surface of the initial panel It should be noted that the height of the long sides is 30 to 70mm lower than that of the sides

short, hence the economy of material compared to other models whose long sides are cut into rectangles whose width is equal to the height of the short sides. A groove is milled along the four sides of the rectangle delimiting the bottom. The cutter is an isosceles triangular section whose apex angle is substantially the complement of the desired angle between the panels after folding-about 90-. A groove of the same section is milled between the short sides and their extension, which we call flaps, parallel to the short sides of the bottom. The distance between these two millings is equal to the width of the bottom, increased or decreased, on both sides of the hinge between bottom and long sides, of

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 the thickness of the panel, depending on whether one wishes to have outer or inner flaps of the finished package. Four indentations located in extension of the short sides of the bottom, made between the rectangle of the bottom and the outer perimeter of the panel, separate the long sides of the flaps and will fold these flaps when setting volume. The sides of the notches are parallel or oblique, according to whether one wants to obtain a package whose four sides will be perpendicular to the bottom, or whose short sides will be slightly oblique.

'sur chaque côté court une surélévation centrale dont la saillie est égale environ à deux à trois fois l'épaisseur du panneau, la longueur de la saillie étant d'environ dix fois l'épaisseur du panneau. To complete the machining and allow the packaging to be stacked one on the other and locked laterally, we realize:

on each side there is a central elevation whose projection is about two to three times the thickness of the panel, the length of the projection being about ten times the thickness of the panel.

 * on the funds an opening sufficient to receive the projection when stacking the packages one on the other.

To volume the package, just fold the two flaps extending each short side of YOU, fold the short sides thus prepared by 900, and fold the long sides 90 to obtain the desired packaging. The two pairs of flaps will be superimposed on the long sides, either internally or externally, depending on the choice; fixing these flaps on the long sides will be done by gluing or stapling or any other appropriate means. The flaps, whose length measured flat is equal to the height of the heads, extends the latter, thus increasing the lifting surface stacking, and are true corner angles transmitting the vertical load without flaming and forming gussets able to withstand with lateral stresses and stresses during handling and transport. The long sides can therefore be lowered without harming the strength of the whole, while providing maximum ventilation, better relief of the products and a substantial saving of panel, of the order of 15 to 25%. In the case where the flaps are rephé inside the long sides, it becomes possible to fit upside down, in pairs, mounted packages, significantly reducing the overall volume during transport and storage empty.

détaillée qui suit. A titre d'illustration, des formes de réalisation de l'objet de l'invention et des modes d'exécution sont représentés, à titre d'exemples non limitatifs, sur les dessins annexés. a la fig. 1 est la vue de dessus du flan découpé et rainuré, à plat, permettant de position- Various other features and advantages of the invention will emerge from the description

detailed below. By way of illustration, embodiments of the subject of the invention and of the embodiments are shown, by way of non-limiting examples, in the accompanying drawings. in fig. 1 is the top view of the blank cut and grooved, flat, allowing position-

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ner les rabats à l'intérieur des côtés longs lors de la mise en volume, et d'incliner les petits côtés vers l'intérieur de l'emballage.

wrap the flaps on the inside of the long sides when setting the volume, and tilt the short sides towards the inside of the package.

FIG. 2 is the top view of the blank cut and groove, flat, for positioning the flaps outside the long sides when setting volume. and to obtain a perfectly parallelepipedic packaging.

FIG. 3 is a perspective view of the pack set volume, with flaps on the inside and slight troncomcité between short sides. in fig. 4 is a perspective view of the packaging volume, with flaps on the outside and perfectly parallelepiped shape. fig. Fig. 5 is an elevational view of the package showing the stacking in the case (Fig. 1) where the short sides determine a slight taper; it specifies the shape of the flaps.

FIG. 6 is a left view of the same package showing that the long sides are perfectly perpendicular to the bottom.

FIG. 7 shows the detail of milling between bottom and long side, and the detail of the cut between long side, flap and bottom.

FIG. 8 shows the detail of milling between short side and flap-interior version.

FIG. 9 shows the detail of the milling between short rib and flap-outdoor version.

FIG. 10 is a perspective view showing the preparation of the short sides, with the flaps folded and the long sides folded before setting volume.

* fig. 11 is a perspective view showing the package set volume and stapled.

FIG. 12 is a perspective view showing the package mus in volume and glued.

FIG. 13 is a perspective view showing the package volume and "riveted".

* fig. 14 shows the detail of riveting-gluing.

With reference to these drawings, the blank is cut from a panel (1) previously sawn to the outer edges of the blank and coated, on a so-called outside face to the packaging, with a printing and a plastic film or a pre-printed sheet, reinforced, if necessary, with a plastic film. This blank comprises: - A central portion (2) -rectangular-bottom of the desired packaging - Two trapezoids (3) (5) each adjoining a long side of the bottom and whose base is substantially equal to the length of this side long - Two rectangles (4) (6) adjacent to the short sides of the bottom - Two parallelograms (7) (8) and (9) (10), extending respectively the short sides (4) and (6)

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- Quatre échancrures coniques (11) (12) (13) (14) séparant les côtés longs (3) (5) des ra- bats respectifs (7) (10) et (8) (9). La pente des côtés de ces échancrures est identique à la pente a que l'on souhaite donner aux côtés courts (4) (6) lors de la mise en volume ; elle peut être égale à zéro si l'on souhaite un parallélépipède rectangle parfait-côtés courts à 900 par rapport au fond-. Le fond des échancrures est défini par un demi-cercle dont le diamètre est légèrement supérieur à deux fois l'épaisseur du panneau.

- Four conical notches (11) (12) (13) (14) separating the long sides (3) (5) of respective ra- bats (7) (10) and (8) (9). The slope of the sides of these indentations is identical to the slope a that it is desired to give the short sides (4) (6) during the setting volume; it can be equal to zero if one wishes a parallelepiped perfect rectangle-short sides to 900 in relation to the bottom-. The bottom of the indentations is defined by a semicircle whose diameter is slightly greater than twice the thickness of the panel.

aux côtés courts est égale à deux à trois fois l'épaisseur du panneau, et d'autre part, des portées obliques (17) (18) (19) (20) dont la pente est identique à celle des échancrures (11) (12) (13) (14), c'est-à-dire la pente souhaitée pour les côtés courts. Le fond comporte deux ouvertures rectangulaires (21) (22) positionnées de telle sorte que les saillies (15) (16) des côtés courts (4) (6) viennent le centrer dans ces ouvertures lors du gerbage des emballages. Une rainure est pratiquée sur la périphérie du rectangle du fond (2), par une fraise à section triangulaire, sur la face interne du panneau. L'angle au sommet est de 900 environ, entre fond et côtés longs (25) (26) ; il est supérieur à 90 pour (23) (24) entre fond et côté court. Quatre rainures à 900 (27) (28) (29) (30) sont pratiquées respectivement entre les côtés courts (4) (6) et les rabats (7) (8) (9) (10), en décalant l'alignement de ces rainures vers le centre de l'emballage par rapport aux rainures (25) (26) entre tond et côtés longs de la valeur de l'épaisseur du panneau. The short sides (4) (6) are cut in their peripheral portion to obtain, on the one hand, the desired height of this side with a central projection (15) (16) whose height relative to

at the short sides is equal to two to three times the thickness of the panel, and secondly, oblique bearing surfaces (17) (18) (19) (20) whose slope is identical to that of the notches (11) ( 12) (13) (14), i.e. the desired slope for the short sides. The bottom has two rectangular openings (21) (22) positioned such that the projections (15) (16) of the short sides (4) (6) are centered in these openings during stacking of the packages. A groove is made on the periphery of the bottom rectangle (2), by a triangular section milling cutter, on the inner face of the panel. The apex angle is about 900, between bottom and long sides (25) (26); it is greater than 90 for (23) (24) between bottom and short side. Four grooves 900 (27) (28) (29) (30) are formed respectively between the short sides (4) (6) and the flaps (7) (8) (9) (10), shifting the alignment these grooves towards the center of the package with respect to the grooves (25) (26) between mower and long sides of the thickness value of the panel.

The setting up of volume (FIG 10) is done on an automatic machine by folding the flaps (7) (8) (9) (10) of 90, then folding the short sides (4) (6) thus prepared for the position at 900 or more from the bottom; At the same time, with a slight delay, the long sides (3) (5) are also folded back to 90. The short sides (4) (6) are folded beyond 900 until the flaps (7) (8) (9) (10) rest against the bottom-the upper part (17) (18). ) (19) (20) of these flaps cut to the desired angle is perfectly horizontal and completes the plane of levitation at the same height as the short sides (4) (6). The lower part of these flaps resting on the bottom ensures the transmission of the load in stacking.

The assembly is done with known means already equipping producers and / or users of packaging (thus prolonging the damping of these conventional equipment): by flat stapling (FIG 11) between the end parts of the long sides ( 3) and (5) and the respective rulings (7) + (10) and (8) + (9). The assembly can be improved if one pre-coated

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 gluing the contacting faces to overlap. The glue can be "cold", so economic, because the take can be done in time under the pressure of the staples.

* by hot-gluing (Fig. 12) like hot-melt, to obtain a fast grip of the inner faces of the sides (3) and (5) and the flaps (7) (8) (9) (10) in the areas where they are superimposed.

A new assembly method (Fig. 13) can be used: one or more holes (31) (32) (33) (34) are drilled in the end zones of the long sides (3) and (5) and holes (35) (36) (37) (38) corresponding in the flaps (7) (8) (9) (10) so that these orifices coincide vis-à-vis at the time of setting volume. The various holes have chamfers (Fig. 14) on the outer faces of the assembly. In order to lock the assembly, it is possible either to insert plastic rivets which will be crimped by reheating or to pour hot-melt hot glue into the orifices, which will constitute so many cooling effects in the one and the other case, the cooling shrinkage ensures the tightening of the assembly. The section of the "rivets" depends on the size of the packaging and the loads to be transported.

Claims (6)

1.-Packing (Fig. 3) and (Fig. 4), intended primarily for the packaging, transportation and storage of fruits and vegetables, rectangular base (2) without lid, whose short sides (4) (6) ) are generally elevated with respect to long sides (3) (5); obtained from a single panel (1) rigid-wood fiber, plywood etc ...- printed or coated on one side of a sheet of paper, pre-printed or not, and / or d a plastic film, characterized in that the package consists of a single piece, cut from a rectangular panel (1), using the entire surface of this panel. in that the packaging comprises nine parts: a) 1 central rectangle constituting the mower (2) b) 2 trapeziums (3) and (5) constituting the long sides, respectively adjacent to the one and the other of the long sides of the bottom rectangle (2), the length of which is substantially identical to the long side of the bottom, and whose height is equal to the height of these long sides in the package to be obtained; (c) 2 rectangles (4) and ( 6) constituting the short sides, adjoining respectively to the one and the other of the short sides of the bottom, of length substantially equal to these sides, and whose width is equal to the height of the package to obtain d) 4 parallelograms called flaps (7) (8) and (9) (10), adjacent the ends of the short sides (4) and (6), one side is substantially equal to the height of the package to obtain and the other side is substantially equal to the width of the long side.  plastic film, thus constituting hinges during the setting volume of the packaging, for assembly.

in that the different intersections between the adjoining parts comprise a groove machined with an isosceles triangular section mill, the angle at the apex of which is substantially 90. These grooves are therefore: * (23) (24) between the bottom (2) and the two short sides (4) (6) * (25) (26) between the bottom (2) and the two long sides (3) ) (5) * (27) (28) (29) (30) between the ends of the short sides (4) (6) and the respective flaps (7) (8) and (9) (10) are depth of the triangular section grooves is limited substantially to the thickness of the panel, without breaking down the thickness of the paper, cardboard and / or <Desc / Clms Page number 8>  . in that four notches (11) (12) (13) (14), located in extension of the short sides of the bottom, formed between the bottom rectangle and the outer perimeter of the panel, separate the long sides (3) and (5) ) flaps (7) (8) (9) (10) and allow folding of these flaps along the fold lines (27) (28) (29) (30) during assembly by volume.

 in that the two arches of the notches (11) (12) (13) (14) each have a slope with respect to the short side of the bottom, the angle of which is equal to the slope that is to be given to the short sides (4) and (6), relative to the vertical, when setting the volume (Fig. 11) (Fig. 12) (Fig. 13): => the edge of the indentation which respectively delimits the flaps (7) (8) (9) (10) can thus take full support on the bottom during the setting volume and transmit the load stacking => the edge of the indentation which delimits respectively the long sides ( 3) and (5) defines the trapezoidal shape of the latter and rehash the perfect parallelism of their ends with the short sides (4) and (6) inclined angle a when setting volume.

 2. Packaging according to claim 1 characterized: 3. Packaging according to claims 1 and 2 characterized in that the short sides (4) and (6) each comprise, on the side opposite the bottom, and parallel thereto, a central projection (15) ( 16), trapezoidal, whose height is approximately equal to three times the thickness of the panel or more, and the width ten to fifteen times * in that the bottom (2) has two openings (21) (22) positioned such that such that the projections (15) (16) center it in these openings when stacking the packages in that the ridges parallel to the short side of the bottom, from the projection to the fold lines (27) (28) ( 29) (30) is o / oMM <? (17) (18) (19) (20) outwardly of the short side at an angle α and thereby defining the flaps (7) (8) (9) (9) in the form of a parallelogram; the latter, when placing the package in volume, will extend horizontally the upper part of the short sides (4) (6), thus increasing the support surface of the stacking bases and constituting angle brackets. rigid angle transmitting the load without flaring and gusset with the long sides (3) and (5), with which they are assembled.  in that the grooves (27) (28) (29) (30) between the short sides (4) and (6) and the corresponding flaps (7) (8) (9) (10) are machined parallel to the large ones. sides of the rectangle

 4. Packaging according to claims 1-2 and 3 characterized <Desc / Clms Page number 9>  bottom (2) and offset towards the center with respect to the grooves (25) and (26) of the thickness value of the panel to allow the flaps, after folding, to fit snugly against the ends of the long sides (3). ) and (5) when setting volume, to assemble.  5. Packaging according to claims 1-2 and 3 characterized:. in that the grooves (27) (28) (29) (30) between the short sides (4) and (6) and the corresponding flaps (7) (8) and (9) (10) are machined in parallel at the long sides of the bottom rectangle and offset outwardly with respect to the grooves (25) and (26) of the value of the thickness of the panel, to allow the flaps, after folding, to fit perfectly to the outside and against the ends of the long sides (3) and (5) when setting the volume (Fig. 4) for assembly.  The hot melt (fig.12) can be made into volume by means of holes drilled for this purpose, according to a new method of assembly which can be made by inserting plastic rivets which it will be heated by heating => either by casting hot-melt type hot glue which will constitute as many rivets at cooling the cooling shrinkage ensuring, in one and the other case, the tightening of the assembly .

 in that it can be transported flat from the country where it is made (forest region) to the place of use (fruit or vegetable growing area). in this rutil can be put in volume simply with known means already equipping producers and / or users of traditional wooden packaging or corrugated cardboard: * multi-headed wire stapler according to (Fig. 11) * machine volume of corrugated packaging and glue assembly

 6. Packaging according to claims 1-2-3 and 4 characterized