FR2718717A1 - Sealed packaging for bananas - Google Patents

Abstract

The sealed envelope is made from a composite transparent film having on its internal face a thermo-weldable film. It has two rectangular faces (1,2), constituted from two bands of opaque film assembled along covering bands, connected together by bellows (3) obtained by folding a sheet of the composite film. The faces are fixed along their sides (8) and at the faces (10,11) of the bellows by welding on the internal thermo-weldable film and the top opening is closed after filling the envelope with fruit.The envelope has layered folds perpendicular to the edges of the bellows fold which are fixed at their ends. The number of layered folds can vary between two and five and set off in steps varying between 3 and 8 cm. These layered folds are opened out at the time of placing the fruit.

Description

The invention relates to a packaging for packaging

  unit of bananas on the place of production.

  Generally bananas are sent by whole or bunches or cut into blocks of 6 or 7 bananas approximately on the place of consumption. These bananas are sent green and stored in appropriate conditioned atmaosphere in which the final ripening phase is artificially triggered just before being delivered for consumption; the ripening as it is currently practiced gives fruits which have lost much of their flavor. The purpose of the operation is to remove the bananas from the banana trees while the m phase (Triss is required to package them in a sealed package under controlled atmosphere to slow them down.

  the ripening phase Up to the place of consumption.

  The object of the invention is to provide a suitable erballajge for this purpose as well as to :: e :: ljences market on the plan

aesthetic and economical.

  Fig .. shows the sheet forming the future envelope according to the invention whose edges are not yet finished

between them:.

  Fig.2 shows the envelope according to the invention, the

  edges are welded but not yet filled with its container.

  Fig.3 shows a preferred variant of the invention

with coated pleats.

  Fig. 4 shows a detail concerning the shape of the folds

layers in Fig. 3.

  Fig.5 represents the packaging of Fig.3 closes with a

banana inside.

  Fig.6 shows a section of a sheet formed of one assembly of 3 films used for the manufacture of the envelope. Fig.7 shows in section a way to fold the film longitudinally according to Fig.b to form a

envelope with window.

  Fig. 8 shows in section another way of joining 3

  Films for constructing the envelope according to the invention.

  Fig.9 shows in section a way to fold the film longitudinally according to Fij.8 to form a

envelope with window.

BAD ORIGiNA.

  The packaging is a waterproof envelope made from a composite thin sheet comprising a gas barrier film, in particular oxygen and on the side facing

  inside at least one film of heat-sealable material.

  The envelope includes two sides (l1) and (2) Fig. 1 of identical rectangular elongated shape connected to each other by a bottom, comprising at least one bellows (3), formed of two; walls (10) and (11), obtained by simple folding of the sheet along the longest side (4 ) and (5) faces (1) and (2); The height (6) of the bellows (3) is preferably between the third and the two: x third of the height (7) of the faces (1) and (2). The faces (1) and (2) Fig. 2 are fi: - xed together by their short side (8) in the part (9) located above the bellows (3) on the one hand and are fi :: ées on the walls (10) and (11) of the bellows (3), in the other part (12), on the other hand; the fixing of the small dimensions (8) of the faces (1) and (2) is obtained by hot welding which is done by pressing the small dimensions in between: x along a strip a few millimeters wide; if the sheet is heat-sealable only by its inner face the bellows does not fix on itself and the ex: lateral hoppers of the envelope appear as a three-pointed star Fig. 2 in the case where it does not there is only one bellows (3); otherwise the two walls (10) and (11) of the bellows (3) weld on themselves at the ends which does not prevent the bellows (3) from being able to deploy in its central part; it then suffices to introduce the banana into the envelope and to close it by welding the two: edges (13) and (14) of the upper opening (15), possibly, after having injected therein the gaseous mixture suitable for delaying of

ripening of the contained banana.

  In a preferred version of the invention, the sheet constituting the envelope is pleated with several ply layers (16) Fig.3 and Fig.4 in a direction perpendicular to the :: edges (17) and (18) Fig.3 delimiting the opening of the future envelope and are fi :: s by welding at their e: end (19); the folds (16) are two in number: five, distributed regularly over a distance ranging, depending on the number of folds, from three to four centimeters; the hollow (20) Fig. 4 of the ply layers (16)

BAD ORIGINAL

  measure from five to fifteen millimeters depending on the number of plies (16); the greater the number of folds the lower the trough; the folds (16) are fixed at their ends by hot welding thanks to the presence of the heat-sealable film located on the internal side (21). The envelope is then formed, as described above, taking care if necessary that the transverse folds (16) do not

  do not come apart when the bellows (22) are formed.

  At the time of implementation of the packaging, the folds are unfolded (16) Fig. 5 at the same time as the bellows (22) which makes it possible to give the packaging a bottom (23) of convex shape while maintaining mechanically the edges (17) and (18) of the opening opposite one another to allow good welding conditions when the assembly is closed. In the context of the declination of this product, it is of course possible to use films which are less efficient than those previously described while remaining within the scope of the invention; we can for example use plasticized paper on one side to carry out the

solders.

  In a variant of the invention, strips of paper (25) and (26) and a transparent film are combined to make a window allowing the fruit to be seen; the sides of the envelope are, for example, constituted by the strips of plasticized paper (25) and (26) Fig.6 and the bellows (31) consists of the transparent film (27); the transparent film (27) Fig.6 being welded, along two lateral bands (28) and (29) of a width (30) which can vary from 5 to 20 mm depending on the films used, with plasticized paper; the lateral assembly bands can be part of the faces (1) and (2) as well as the bellows (3) without leaving the domain

of the invention.

  In a preferred version of this variant, the film (32) Fig.8 and Fig.9 constituting the envelope is entirely transparent, but the faces (33) Fig.9 are covered with another material in the form of a thin film (34 ) which is fixed by gluing or welding, on all or part of the contacting surface; it can be, by e :: ample, without this e: xample being limiting, a plasticized paper to allow the

welding on the film.

  b- AD de._ INA To make such a packaging, one can use a coil having the width equal to the height (7) Fiq.1 of the two side faces increased by the height (6) of the two walls of the bellows (3) . The folds (16) Fig.3 are produced, when there are any, transverse to the direction of unwinding of the coil, and the bellows (3) or (22) are produced by longitudinal folding. If you want to make an envelope with a window (31) made with a transparent film (27) Fig. 7 and two opaque faces made with different material, you can start with three coils and assemble the three films (25) (26) and (27) Fig. 6 before entering the forming phase of the envelope itself. In the case where the transparent film (32) constitutes the basic structure of the envelope as described previously in FIG. 9, the film of opaque material is then attached and fixed according to two: x lateral bands (34); starting from a reel of transparent material of necessary and sufficient width for the manufacture of the envelope, the lateral opaque parts (34) are attached from two reels, they are fixed by an appropriate means and the whole can be rewound in a first operation independent of the manufacture of the envelope. This has the advantage of making the assembly at higher rates and simplifying the implementation

  works on the envelope making machine.

  While remaining within the scope of the invention, the various types of films previously described can be used to manufacture envelopes according to the invention, the coated folds of which are produced, by longitudinal folding with respect to the direction of unwinding of the sheet to form the folds (16) Fig. 3 if there are any, then by transverse folding

for the bellows.

  It should be noted that the shape of the end of the star-shaped envelope facilitates opening by simply pulling one hand on one of the branches of the star while holding the two in the other hand. other branches of the star.

BAD ORIGINAL

Claims (5)

CLAIMS l-Waterproof envelope made from a composite film comprising on its internal face a heat-sealable film characterized in that it is formed of two rectangular faces (1) and (2) connected together by at least one bellows (3), obtained by folding a sheet of said composite film, the faces (1) and (Z) being fixed, according to their dimensions (8), to each other and to the faces (10) and (11) of the bellows ( 3) by welding on itself of the heat-sealable internal film, while the opening (15) is closed in the same way after filling the envelope.   2-sealed envelope according to claim 1, characterized in that the envelope comprises coated folds (16) perpendicular to the folding edges of the bellows (22)   and which are fixed at their ends (19).   3-sealed envelope according to claim 2, characterized in that the number of plies (16) can vary from two to five, with a hollow (20) which can vary from five to fifteen hollow millimeters and distributed in a pitch that can   vary from three to eight centimeters.   4-Waterproof envelope, according to any one of   Claims 1 to 3, characterized in that the bellows (3)   is essentially composed of a transparent film (27) while the faces (1) and (2) consist of two strips (25) and (26) of an opaque film assembled in strips (28) and (29).   -Waterproof envelope, according to any one of   Claims 1 to 3, characterized in that the envelope is   essentially composed of a transparent film (32) while the faces (1) and (2) are externally covered with two strips (34) of an opaque film fixed on the film (34)   according to all or part of their common surface.   6-Waterproof envelope, according to any one of   claims 1, 4, and 5, characterized in that the   bellows (3) is deployed when the fruit in the envelope.   7-Waterproof envelope, according to any one of   Claims 3, 4, 5, and 6 characterized in that the folds   (16) are deployed when the fruit is placed in the envelope. BAD ORIGINAL