FR2595324A1 - CUTTING FOR PRODUCING FRUIT AND VEGETABLE TRAYS AND METHOD FOR ASSEMBLING SUCH CUTTING - Google Patents

Abstract

THE PRESENT INVENTION CONCERNS A CUTTING FOR THE REALIZATION OF A PARALLELEPIPEDIC CONTAINER OPEN AT ITS UPPER END SUCH AS A FRUIT AND VEGETABLE TRAY AND WHICH IS OF THE TYPE CONSISTING OF A CUT AND RAINED CARDBOARD BLANK AND CONTAINING THE VERTICENTAL AREIPTES OF THE RECEPTACLE INTERIOR VERTICAL REINFORCEMENTS, CHARACTERIZED IN THAT THE CARDBOARD BLANK 1 IS IN THE FORM OF A SINGLE PIECE CONTAINING ALL THE PARTS 2, 3, 4, 5 INTENDED TO FORM THE BOTTOM AND THE VERTICAL WALLS AS WELL AS THE SEALING LEGS OF THE CONTAINER, SAID REINFORCEMENTS 6 BEING FIXED ON LEDIT FLAN 1 WHEN THIS IS EXTENDING FLAT IN A HORIZONTAL PLANE BEFORE SHAPING THE CONTAINER TO BE FORMED. THE INVENTION ALSO RELATES TO A PROCESS FOR THE ASSEMBLY AND SHAPING OF THE CUTS ACCORDING TO THE INVENTION.

Description

The present invention relates to a cut-out for the production of a

  parallelepiped container open at its upper end such as a tray for fruits and vegetables and which is of the type consisting of a cardboard blank découné and grooved and having vertical vertical reinforcements of the container vertical reinforcements. In the known cuts of this type, the cut and grooved cardboard blank forms the bottom and two vertical walls of the container to be formed. The reinforcements are connected in pairs to form the other two opposite vertical walls of the container. They are most often interconnected by strips of wood unrolled to increase the rigidity of the container obtained. Such a structure is complex because the container must be assembled from three separate parts and this assembly is long and expensive and is difficult to mechanize on

  machines working at high speeds.

  The present invention aims to design a cutout of said type which assembly is easy and fast and can be implemented using automatic devices working at high rates. According to the present invention, said cardboard blank is in the form of a single piece comprising all the parts intended to form the bottom and the vertical walls as well as the sealing tabs

  of the container, said reinforcements being fixed on said blank when said

  it extends flat in a horizontal plane before shaping the

container to form.

  This produces a cutout consisting of a single niece and whose reinforcements are fixed flat on the cardboard blank. This cut can be handled and transported flat and be formatted only at

  moment of its use by simple folding and sealing.

  Preferably, the portion of the cardboard blank has facing adjacent ends reinforcements, perforated portions whose section substantially corresponds to that of the reinforcements, the latter extending beyond the outer or upper edges of the blank portions intended

  to form the vertical walls of the container.

  This facilitates the stacking of the containers on each other.

  The present invention also relates to a method for assembling

cutouts according to the invention.

  The method according to the present invention consists in depositing the reinforcements - 2 - in predetermined positions on a moving horizontal conveyor, to deposit on the upper face of each reinforcement a layer of an adhesive material, to be deposited on all the reinforcements glue said cut and scored cutout and lift the portion intended to form the bottom of the container to be formed in the vertical direction so that the portions of the cut bearing the reinforcements are folded down under the action of gravity, to fold the two other parts of the cut and seal the tabs on the first said parts holding the parts in a vertical position perpendicular to the

  plane of the part forming the bottom of the container.

  The assembly can thus be carried out in a continuous manner without complex handling of the cardboard blank and reinforcements. Similarly, the shaping of the blank to form the container is an operation

simple and fast.

  Other embodiments and advantages of the invention will emerge from

  the description which follows and with reference to the accompanying drawings on

  FIG. 1 is a plan view of a preferred embodiment of the blank according to the invention; FIGS. 2 to 5 are diagrammatic side elevational views showing the essential phases of the method according to the invention;

  for shaping the cutout according to the invention.

  The cutting according to the invention shown in FIG.

  killed from a cardboard cut, for example corrugated cardboard, bearing the

  general reference (1) and which is produced in one piece by means of

  page from a rectangular cardboard plan.

  The cutout (1) comprises a central portion (2) intended to form

  the bottom of the container to be formed, two parts (3) forming the vertical walls

  longitudinal tices and two parts (4) forming the transverse vertical walls of the container to be formed. Each part (3) includes, in addition,

  two sealing lugs (5) for connecting the parts (3) to the parts

  (4) after shaping the container when the parts (3) and

  (4) extend perpendicular to the bottom (2).

  The two parts (4) intended to form the transverse vertical walls of the container carry in the vicinity of their lateral ends, reinforcement amounts (6) consisting of wooden elements of triangular section. These reinforcements or uprights (6) extend

  beyond the outer or upper end of the corresponding part (4)

  -3- laying and are fixed on it by gluing before the shaping of the cut when the different parts (2, 3 and 4) of the cut

  (1) lie flat in the same plane.

  Opposite the inner or lower end of each reinforcement (6), the bottom portion (2) of the cutout has a perforated portion (7) whose cross section substantially corresponds to that of the reinforcements (6) and which makes it possible to a known way a vertical stack of several containers

  made from cuts according to the present invention.

  Between the different parts (2, 3, 4 and 5) of the blank (1) there are provided, in a known manner, folding baits (8) made, for example, by grooving, which allow the parts to be bent together.

  compared to others for the shaping of the cut.

  FIGS. 2 to 5 show the essential phases of the method according to the invention for shaping the blank shown in FIG. 1. In FIG. 2, a horizontal conveyor belt (9) carrying lugs (10) for positioning and driving reinforcements (6) of the predetermined relative positions corresponding to their position on the cut and grooved cardboard blank (1). In advance

  reinforcement on the carpet (9) is deposited with a dispensing gun.

  glue scorer (11), a layer of an adhesive material (12) on the face

  upper part of each reinforcement (6), FIG.

  Then, the cut and grooved blank (1) is deposited on the reinforcements

  (6) to seal on them through the adhesive layer. This operation

  can be easily carried out without stopping the carrier to the afde

  a cutter dispenser of a known type arranged above the conveyor

  carrier. When the adhesive material (12) which is preferably a glue

  heat-deposited on the reinforcements (6) has hardened and provides a seal

  the cardboard blank (1) on the reinforcements, the assembly of the blank (1, 6) is lifted by means of a cylinder (13) upwards so that the parts (4) carrying the reinforcements (6) fold down under the action of gravity, to facilitate the shaping of the container (Figure). This operation can be carried out on the carrier (9), as

  schematically represented in (14) in FIG. 4. In this case, the transmission

  carrier consists of two separate longitudinal strips between

  which is provided a passage for the cylinder (13). It can also be performed outside the conveyor (9) as shown schematically

in Figure 5.

  - 4 - Then, the other two parts (3) are folded down and the tabs (5) are folded on the outer face of the parts (4) and

  are fixed by sealing and stapling.

  These phases are known and within the reach of those skilled in the art and are, for this reason, not illustrated or described here. Of course, the invention is not limited to: -modes of realization

  described and represented here, but many modifications can be made

  cations without departing from the scope of the invention.

  For example, we can replace the collage of the cut by a

  fixation of the staple cut per se known per se.

- 5-

R; EVDICATIONS

  1) Cutting for the production of a parallelepiped container open at its upper end such as a tray for fruits and vegetables And which is of the type consisting of a blank of cardboard cut and grooved and

  vertical reinforcements of the container with vertical reinforcements

  characterized in that said carton blank (1) is in the form of

  one-piece form comprising all the parts (2, 3, 4, 5)

  to form the bottom and the vertical walls and the sealing lugs of the container, said reinforcements (6) being fixed on said blank (1) when it extends flat in a horizontal plane before the setting

in the form of the container to be formed.

  2) Cutting according to claim 1, characterized in that the

  part (2) of the carton blank (1) has opposite ends

  reinforcements (6), perforated parts (7) whose section corresponds to

  to the reinforcements (6), these reinforcements (6) extend

  beyond the outer or upper edges of the parts (3, 4) of the

  blank (1) for forming the vertical walls of the container.

  3) Method for assembling a cutout according to any one

  of claims 1 or 2, from a blank (1) cut and grooved and

  reinforcement (6) pre-cut, characterized in that it consists in depositing the reinforcements (6) in predetermined positions on a moving horizontal conveyor (9), to be deposited on the upper face of each

  reinforcement (6) a layer of an adhesive material (12) to be deposited on the assembly.

  glue reinforcement (6) said cut and grooved cut (1) and to lift the portion (2) for forming the bottom of the container to be formed in a vertical direction so that the portions (4) of the cutting (1) the reinforcements (6) are folded down under the action of gravity, to fold the two other parts (3) of the blank (1) and to seal the tabs (5) on the first said parts (4) in now the parts (3) and (4) in a vertical position perpendicular to the plane

  part (2) forming the bottom of the container.