ES2421544B2 - CONTINUOUS BAND FOR MANUFACTURE OF BAGS FOR HORTOFRUIT AND SIMILAR PRODUCTS. - Google Patents

Abstract

Continuous band for the manufacture of bags for fruit and vegetable products and the like. # The continuous band consists of a continuous sheet of plastic, in which, in correspondence with each of its sectors, in longitudinal alignment, corresponding to the subsequent production of the bags, rectangular plastic plates are placed in such a way that once the corresponding heat welding is made, these rectangular plastic plates are located on opposite sides of the formed bag that once filled with the product to be packaged adopts a box shape or basket. # The continuous band will have the corresponding die-cut windows closed by heat-welded net fragments to the continuous plastic sheet.

Description

Continuous band for manufacturing bags for fruit and vegetable products and the like.

Technical sector of the invention.

The present invention relates to a continuous band, which has been specially designed for the manufacture of bags for fruit and vegetable products and the like, by longitudinal heat welding of said band through its longitudinal edges, to convert it into a continuous tube, and by cross cutting and welding parallel to said cut, to obtain the unitary bags, closing and independence of the same.

The object of the invention is to achieve a continuous band that incorporates two rectangular plates of plastic material and a series of windows and, where appropriate, perforations, from which it is possible to obtain, by joining its heat-welded edges, a bag, two of whose sides are rigid, and that once filled with the product to be packaged, it adopts a shape similar to a tray or basket and that has one or more perforations, in order to obtain a maximum mechanical resistance of the bag, a correct aeration of the products, an optimal protection of the products contained therein against crushing, a greater printing capacity in the bag and a faster manufacturing of the bag and its filling.

Background of the invention.

Certain fruit and vegetable products, such as tomatoes, cherries, oranges, etc., have long been marketed in paper or cardboard baskets or wooden or plastic boxes that in many cases are protected and wrapped in perforated or not plastic bags that allow both aeration of the product, the direct display of the product, its protection against crushing and facilitate its storage or exhibition in the exhibitors and linear points of sale.

The above baskets or boxes must be filled with the aforementioned products manually or by machines with low production speeds. In addition, later these baskets or boxes have to be wrapped in plastic bags. The process of packaging the fruit and vegetable products in these baskets or boxes is slow and the materials have a high cost.

Description of the invention

The continuous band for manufacturing bags proposed by the invention constitutes a new technological advance in this field and is based on the use of a continuous band that is intended to close on itself, by joining its longitudinal edges by means of a parallel heat welding to said longitudinal edges, to configure a fragmentable continuous tube in a plurality of sectors corresponding to the respective bags, said continuous band has one or more windows and, where appropriate, perforations of the same or different size. Said continuous band is a continuous sheet of plastic, of a width equal to that of the continuous band. Corresponding to each of the sectors of the continuous plastic sheet provided for obtaining a bag, two rectangular plates of plastic material whose longitudinal axes are parallel to the longitudinal axis of the continuous plastic sheet are attached to said continuous plastic sheet .

In a preferred embodiment of the invention the distance between the longitudinal axes of the two rectangular plastic plates is half the width of the continuous plastic sheet.

In another preferred embodiment of the invention the length of the rectangular plastic plates is less than the length of the sectors provided for obtaining a bag less the width of said rectangular plates.

In another preferred embodiment, the rectangular plastic plates are attached to the continuous plastic sheet by heat welding or gluing.

The material of the rectangular plastic plates can be polypropylene or polystyrene.

Likewise, in correspondence with each of the sectors of the continuous plastic sheet, at least one window can be established, which is closed with the collaboration of a network fragment, formally and dimensionally appropriate to said window and fixed by heat welding to the periphery of said windows, such that the windows do not overlap with rectangular plastic plates.

Furthermore, when only one window is established on the continuous plastic sheet, it can be placed centered on the longitudinal axis of said continuous plastic sheet and on both sides of it, small perforations, lacking a net, can be established that do not coincide with the position of rectangular plates.

ES 2 421 544 A1

The net that closes the window can be a continuous strip of net that runs longitudinally through the continuous sheet of plastic.

Description of the figures.

To complement the description and in order to help a better understanding of the characteristics of the invention, in accordance with a preferred embodiment of the invention, a set of figures is attached as an integral part of the description, where it is illustrative and not limiting, the following has been represented:

Figure 1 shows a perspective exploded view of a continuous band for manufacturing bags for fruit and vegetable products and the like.

Figure 2.- Shows a perspective of the continuous band of Figure 1 duly finished.

Figure 3.- It shows two perspectives of a bag obtained in which the shape of a basket or tray that the bag acquires once it is filled with product and the thermosoldaduras made.

Figure 4.- Shows a continuous band duly finished with a central window closed by a network fragment and a series of perforations on both sides of the central window.

Figure 5.- It shows a properly finished continuous band in which the central windows are closed by a strip of net that runs longitudinally through the continuous plastic sheet.

List of references.

1 continuous band

2 Continuous plastic sheet

3 Window

4 Position of rectangular plastic plates

5 Rectangular plastic plate

6 Network fragment

7 Bag

8 Longitudinal heat welding

9 Transverse heat welding

10 perforations

11 Net strip

Preferred Embodiment of the Invention

In view of the figures, especially 1 and 2, it can be seen how the continuous band (1) for manufacturing bags, object of the present invention, comprises a continuous plastic sheet (2), of a width coinciding with that of the bag itself. continuous band (1) and consequently of width greater than twice the width of the bag to be obtained. Clusters of windows (3) and, where appropriate, perforations (10) both obtained by die-cutting, and positions (4) of the rectangular plastic plates (5) are established along the continuous plastic sheet (2). , preferably a grouping for each bag (7) to be obtained from said continuous band, there being at least one window (3) centered on which the upper face of the bag must be, and optionally a series of perforations (10) that without The need for them to be closed by means of network fragments helps to aerate the packaged product. The position of the rectangular plastic plates (5) of each group will be adequate so that when manufacturing the bag they are placed on the sides of the bag where there is no heat welding.

The continuous plastic sheet (1) will be joined by its longitudinal edges by means of a longitudinal heat welding

(8) and by means of a double transverse heat welding line (9) to form the bag.

The network fragments (6) that close the respective windows (3) are fixed by heat welding. Rectangular plastic plates can be fixed to the continuous plastic sheet by heat welding its edges to the continuous plastic sheet or by gluing.

In another preferred embodiment, the windows are closed by means of a net strip (11) that longitudinally runs through the plastic sheet and which is fixed to said sheet by means of the transverse heat seals (9).

In the above-described embodiments, the resulting bag, once filled with the chosen fruit and vegetable product, adopts a tray or basket form in which two of its sides are formed by two rectangular plastic plates (4), the material of which can be polypropylene or polystyrene, They offer optimum resistance to prevent crushing of the packaged product.

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In any of the cases described above, the resulting bags offer ample areas for graphic prints alluding to the products contained therein.

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Claims (8)

one.

Continuous band for the manufacture of bags for fruit and vegetable products and the like, of the type in which said band is intended to close on itself, by joining its longitudinal edges by heat welding, to configure a fragmented continuous tube in a plurality of sectors corresponding to respective bags, said continuous band has one or more windows and, where appropriate, perforations of the same or different size, characterized in that it is constituted from a continuous sheet of plastic, of width equal to said continuous band, continuous sheet of plastic to which, in correspondence with each of the sectors of the same provided for obtaining a bag, two rectangular plates of plastic material are joined whose longitudinal axes are parallel to the longitudinal axis of the continuous plastic sheet.

2.

Continuous band for manufacturing bags for fruit and vegetable products and the like according to claim 1, characterized in that the distance between the longitudinal axes of the two rectangular plates is half the width of the continuous plastic sheet.

3.

Continuous band for manufacturing bags for fruit and vegetable products and the like according to claims 1 and 2, characterized in that the length of the rectangular plates is less than the length of the sectors provided for obtaining a bag less the width of said rectangular plates.

Four.

Continuous band for manufacturing bags for fruit and vegetable products and the like according to claims 1 - 3 characterized in that the plates are joined to the continuous plastic sheet by heat welding or gluing.

5.

Continuous band for manufacturing bags for fruit and vegetable products and the like according to any of claims 1-4, characterized in that the material of the rectangular plates is polypropylene or polystyrene.

6.

Continuous band for manufacturing bags for fruit and vegetable products and the like according to any one of claims 1 -5 characterized in that at least one window is established in correspondence with each of the sectors of the continuous plastic sheet, which is closed with the collaboration of a network fragment, formally and dimensionally suitable to said window and fixed by heat welding to the periphery of said window, such that the position and size of the window does not overlap with rectangular plates.

7.

Continuous band for the manufacture of bags for fruit and vegetable products and the like according to claim 6, characterized in that when a single window with its corresponding network is established in each sector of the continuous plastic sheet, said window is centered centered on the longitudinal axis of the continuous sheet of plastic, and on both sides of it are established small perforations, lacking net, that do not match the position of the rectangular plates.

8.

Continuous band for manufacturing bags for fruit and vegetable products and the like according to claim 7, characterized in that the net that closes the window is a continuous strip of net that runs longitudinally on the continuous plastic sheet.

ES 2 421 544 A1 ES 2 421 544 A1 Figure 4 Figure 5