WO2018073462A1 - A bag that is suitable for packaging fruit and vegetable products, method - Google Patents

A bag that is suitable for packaging fruit and vegetable products, method Download PDF

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Publication number
WO2018073462A1
WO2018073462A1 PCT/ES2016/070743 ES2016070743W WO2018073462A1 WO 2018073462 A1 WO2018073462 A1 WO 2018073462A1 ES 2016070743 W ES2016070743 W ES 2016070743W WO 2018073462 A1 WO2018073462 A1 WO 2018073462A1
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WO
WIPO (PCT)
Prior art keywords
tubular formation
bag
tubular
faces
formation
Prior art date
Application number
PCT/ES2016/070743
Other languages
Spanish (es)
French (fr)
Inventor
Ezequiel Giro Amigo
Original Assignee
Girnet Internacional, S.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Girnet Internacional, S.L. filed Critical Girnet Internacional, S.L.
Priority to PCT/ES2016/070743 priority Critical patent/WO2018073462A1/en
Publication of WO2018073462A1 publication Critical patent/WO2018073462A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/01—Ventilation or drainage of bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/04—Windows or other apertures, e.g. for viewing contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
    • B65D33/20—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using pressure-sensitive adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
    • B65D33/22—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps using heat-activatable adhesive

Definitions

  • the present invention relates to a bag suitable for the packaging of fruit and vegetable products, such as citrus fruits or tubers.
  • the bag is formed by an envelope of a sheet material, for example, plastic. So that these bags are breathable, and suitable for packaging fruit and vegetable products, the sheet material is perforated or has a series of openings.
  • the envelope of sheet material is internally coated with a mesh that helps to confine the products in the bag, which allows to increase the size of the perforations or openings made in the sheet material and to select a shape and distribution for convenience, increasing creative freedom in the design of the bags.
  • the invention aims to make known a bag capable of standing up obtained from a tubular formation of a material whose thickness has been selected to resist the weight of the product when the bag is transported suspended, without said selection being conditioned to increase the usual stiffness of the bag. Increasing the thickness of the material to ensure that the bag held up is an increase in the amount of material and, consequently, the cost of obtaining per bag unit, aspects that are intended to be avoided or attenuated.
  • the process must be easily adaptable for various types of bags and therefore versatile. For example, you should share the maximum number of possible operations between a variant that allows you to obtain bags in which the envelope of the product you store is composed entirely of a sheet material; and another variant in which a sheet material and a mesh are combined. Explanation of the invention.
  • the proposed bag is of the type that is obtained from a tubular formation of a sheet material closed at its ends to form a bottom and an upper cartouche, distinguishing in the said tubular formation two major faces and two minor faces, of bond between the two major faces along at least a longitudinal portion of said tubular formation.
  • the bag is characterized in that the minor faces comprise a reinforcing edging, which also extends along the tubular formation, formed by the juxtaposition and joining of longitudinal strips of the material that make up each minor face; and because the minor faces have been manipulated to present longitudinal folds and adopt their cross section a sunken shape towards the inside of the tubular formation, each reinforcement rim determining a kind of longitudinal appendix that extends along the associated minor face and which contributes with the edging of the other side so that the bag is in an upright position when it is placed full supported on its bottom.
  • the invention provides that the tubular formation is formed by a single or more than one sheet of the sheet material giving rise to different alternatives to form the edges.
  • juxtaposed and joined longitudinal strips that form the reinforcing edges are portions of different sheets (A, B) of sheet material, preferably being longitudinal or extreme longitudinal strips at the edge of said sheets.
  • the juxtaposed and joined longitudinal strips that form one of reinforcing edges are strips of contiguous portions of the same sheet (D) of sheet material while the longitudinal strips that form the other of the edges are opposite strips of opposite edges of this same sheet (D).
  • the two pairs of juxtaposed and joined longitudinal stripes each forming a reinforcement border are portion strips adjacent to the same sheet (D) of closed section sheet material, obtained for example by blowing techniques.
  • each reinforcement trim is in any case arranged centered on its associated minor face.
  • the invention provides the sheets facing and joined by their longitudinal edges, the central portion of each sheet determining one of the major faces and on each side a half of a smaller face of the tubular formation.
  • each sheet (A, B) has a series of longitudinal folds, comprising two main folds that extend at least along a portion of the tubular formation (22), around which each sheet is folded in the direction to the opposite sheet and that delimit between them a corresponding major face of the tubular formation; and two extreme folds that extend along the tubular formation, next to two edges of the sheet, each determining with the edge of the sheet associated the longitudinal strip of material of a half face smaller than attached to the strip Longitudinal analog of its complementary half forms a reinforcing edging.
  • the reinforcement edges extend outward from the tubular formation, that is between the two halves of each minor face in the event that the tubular formation is formed by two sheets (A, B).
  • Reinforcement piping can also extend into the tubular formation.
  • the smaller faces are sunk into the tubular formation along the entire length of the tubular formation, including its ends, or only along a longitudinal portion.
  • the width of the reinforcing edges may not be constant along the tubular formation.
  • the width of the smaller faces in that portion of the tubular formation along which they are sunk inwardly may not be constant along said tubular formation.
  • the sheet material from which the tubular formation is obtained has or is provided with at least one window or opening.
  • Said at least one window or opening is preferably located on a larger face of the tubular formation.
  • the tubular formation is at least partially coated, inside or out, with a mesh material.
  • the mesh material may be in the form of a tubular mesh such that it fits inside or outside the said tubular formation of sheet material.
  • the invention provides that the tubular formation is only covered by the part coinciding with the window or opening, so that the mesh material closes or covers said opening.
  • the tubular formation is closed at its ends by juxtaposing and joining the upper and lower edges of its major faces, with interposition of the smaller faces folded on themselves between said major faces on one or both of its ends.
  • a process for the manufacture of a bag suitable for the packaging of fruit and vegetable products comprising the operations of
  • the sheet material constituting the tubular formation can have or can be provided with at least one opening and inside the tubular formation it can be longitudinally inserted, extending between the first and second transverse seams, a tubular mesh in which the interior is confined the product.
  • the invention contemplates that the reinforcement edges are formed in the sheet material that constitutes the tubular formation prior to making the longitudinal folds that determine the smaller sunken faces towards the interior of said tubular formation.
  • Figs. 1 and 2 show two variants of a bag according to the invention
  • Fig. 3a is a perspective and schematic view that simultaneously shows how it can be obtained and the general shape that a tubular formation can take from which a bag according to the invention can be made, in the example from two sheets of a sheet material;
  • Fig. 3b is a plan view of Fig. 3a, which illustrates the cross section that will take the tubular formation in the case of Fig. 3a;
  • Figs. 4, 5, 6, 7 and 8 are cross sections of as many alternative tubular formations as in Figs. 3b and which also contemplates the invention;
  • Fig. 9 shows a sequence of several stages in the manufacture of a bag according to the invention, different alternatives having been illustrated for obtaining the tubular formation that will be manipulated in the illustrated stages;
  • Fig. 10 shows another sequence of several final stages in the manufacture of a bag according to the invention, as an alternative to the sequence depicted in Fig. 9.
  • Figs. 1 and 2 show two variants of a bag 1 according to the invention.
  • the bags 1 are obtained, as will be explained in detail below, from a tubular formation of a sheet material and closed at its ends to form a bottom 13 and a top cartouche 14. Prior to its closure this tubular formation will have been manipulated to longitudinally bend two portions facing towards the inside of the tubular formation and thus promote two lateral sinks that will determine in the tubular formation two major faces 4 and 5 (of which only face 4 is visible in Figs. 1 and 2) and two minor faces 6, 7.
  • the sheet material is perforated in its larger faces and has a series of openings 12 that allow the aeration of the bag, which makes it suitable for perishable products.
  • the openings 12 are larger and in the construction of the bag 1 a mesh material 15 has also been used, which in the example covers the openings 12.
  • the invention provides that the tubular formation involved in obtaining the bags 1 is formed by a single sheet of a sheet material or by more than one sheet.
  • Figs. 3a and 3b schematically illustrate a possible way of obtaining a tubular formation 22; how these reinforcement trims are formed 8; and what will be its particular arrangement, in the event that the tubular formation 22 is formed from two sheets A and B of a sheet material.
  • the proportions and / or relative dimensions shown in these drawings may be exaggerated to be able to better identify the folds and the areas to be joined together to reach the tubular formation.
  • Fig. 3a shows a first sheet A and a second sheet B of a sheet material, conveniently folded and joined along its side edges as follows:
  • the sheet A has two main folds 10 around which the sheet A bends in the direction of the facing sheet, between these main folds 10 defining a larger face 4 of the tubular formation 22 and on each side a half 6a and 7a of a minor face 6, 7 of said tubular formation 22; and two extreme folds 1 1, close to two edges of the sheet, each determining a longitudinal strip 8a on one edge of the sheet A.
  • Sheet B also has similar main folds 10 around which sheet B bends in the direction of the facing sheet, which in this case delimits the other major face 5 of the tubular formation 22 and on each side the complementary halves 6b, 7b of the smaller faces 6, 7 of the tubular formation 22; and two extreme folds 11, analogous to the folds 1 1 of the sheet A, next to two edges of the sheet each determining a longitudinal strip 8b on one edge of the sheet B.
  • Each of the two longitudinal stripes 8a of the sheet A is juxtaposed and joined to one of the two longitudinal strips 8b of the sheet B, thus forming two reinforcing edges 8 which in the example (see Fig. 3b) project outwards of tubular formation 22. It is important to note that the union of each pair of strips 8a and 8b can be anterior or subsequent to form the main folds 10 and that in Fig. 3a the strips 8a and 8b whose union forms a corresponding reinforcement border 8 have been shown facing each other. , but not joined, to facilitate the explanation of the invention.
  • Figs. 4 to 8 show alternative tubular formations 22 to that illustrated in Fig. 3b and in them the same numerical references have been used to indicate similar technical characteristics to those identified in Figs. 3a and 3b above.
  • the tubular formation 22 is originally constituted by a single sheet D of sheet material which can be obtained by blowing techniques. Two laterals of the tubular formation 22 have been sunk inwards to determine the smaller faces 6, 7; and at the bottom of these sinks that determine the smaller faces 6, 7, the reinforcement edges 8 are formed in this case by juxtaposition and joining of adjacent longitudinal strips already of origin in the same sheet D.
  • sheet D has two folds 1 1 'which together with the folds 11 and 10 allow the tubular formation 22 to be pleated until it adopts a shape with the cross section represented in said Fig. 5.
  • the tubular formation 22 is also constituted of a single sheet D of sheet material, but in this case non-tubular of origin.
  • a reinforcing edging 8 which is arranged to the right of the image, is formed by the union of two strips of opposite edges on the sheet D while the other reinforcing edging 8, which is arranged on the left of the image, it is formed by the juxtaposition and union of two contiguous strips of origin on sheet D, for which a fold 11 'analogous to those of Fig. 5 should be formed.
  • Other alternatives are illustrated in Figs. 6 to 8 which show that the invention contemplates that the reinforcement edges 8 project into the interior of the tubular formation 22. This option is compatible when the reinforcement edges 8 are formed by joining different sheets (see Fig. 6 ); for the juxtaposition and joining of adjacent longitudinal strips of the same sheet (see Fig. 7); or a mixture of both cases (see Fig. 8).
  • Fig. 9 shows a sequence of steps B to F that can be followed in a procedure for obtaining a bag 1, in particular a bag 1 according to the example of Fig. 2.
  • the procedure of Fig. 9 can start of a single or more sheets of sheet material, as options A1, A2 and A3 illustrate, to obtain the tubular formation 22 shown in step D. It is characteristic of this procedure for obtaining the bag 1 that the trims reinforcement 8 are formed in the sheet material that constitutes the tubular formation 22 before having sunk the facing sides that determine the smaller faces 6, 7.
  • the tubular formation 22 has two windows or openings 12, each facing each other on a larger face 4 and 5 of the tubular formation 22, openings that will later be covered by a mesh 15 for which it is used, in this example, a tubular mesh 16.
  • These openings 12 can be made originally in the sheet material that is manipulated to obtain the tubular formation 22.
  • said openings are covered by a mesh material 15.
  • the supply of sheet material with these particularities is known even for the manufacture of similar bags to which the invention refers, that is with two major faces and two minor faces of link between the major faces.
  • An example of this type of sheet material is described in WO2008040826.
  • a tube 2 of sheet material with two openings 12 on opposite faces is provided.
  • Tube 2 has two seams sides that determine reinforcement ribs 8. Depending on the characteristics of the starting material, these reinforcement ribs 8 will be obtained in one way or another.
  • the reinforcement edges 8 will be obtained by flattening the starting tube 2 and crushing and joining the longitudinal edges thereof.
  • the reinforcement edges 8 will be obtained by juxtaposing the sheets A and B and joining them together along their longitudinal edges.
  • the starting sheet D will be folded over itself, making its longitudinal edges coincide, which will be joined together while crushing and joining together the adjacent longitudinal strips remaining on each side of the fold.
  • a tubular mesh 16 will be inserted into the tube 2.
  • the tubular mesh 16 and the tube 2 will be joined along a series of longitudinal seams, exemplified by the seams 17 in the drawing of the stage C, symmetrically arranged with respect to the openings 12.
  • each minor face 6, 7 has a general V-shaped cross-section, the reinforcing edging 8 being arranged at the apex of the V, in this case facing outwardly of the tubular formation 22.
  • step D It also proceeds to the formation of the bottom 13 of the future bag 1, juxtaposing the major faces 4 and 5 with interposition of the sunken portions, that is to say with the interposition of the minor faces 6 and 7 folded in half, and joining them forming a transverse seam, exemplified in the drawing by transverse seam 18.
  • Step D will preferably comprise a cross-sectional operation of the package formed by the tubular formation 22 and the tubular mesh 16 coinciding with this transverse seam 18.
  • the tubular formation 22 is made of thermo weldable plastic material. Suitable materials may be polyethylene, polypropylene, polyester, paper or a combination of these. The material may comprise several layers or layers, each of a different composition, preferably of a material selected from the above listing. The thickness of the tubular formation 22 may be between 25 and 150 microns.
  • step E the tubular formation 22 closed at a lower end 22b can be introduced through an opening in the tubular mesh 16 of the required or selected amount of product 20 into said tubular mesh 16 so that it will remain confined the product inside it and wrapped more externally by tubular formation 22.
  • the product 20 will tend by gravity to occupy the lower part of the tubular formation 22 closed lower, supported on the bottom 13 of the future bag 1, which will cause the expansion of the bag 1 attenuating the sinking of the lateral faces 6 and 7 at the bottom of said bag 1.
  • the bottom 13 will be flattened when the bag 1 rests on said bottom, which causes a crushing effect of the reinforcement edges 8 that will be attached to the surface of the smaller face associated 6 or 7. This effect will be compensated at the opposite end of the bag 1 once finished, of so that the reinforcement edges 8 will be arranged vertically and slightly raised with respect to the surface of the smaller faces 6 and 7.
  • Step F shows the completion of the closing operation of the tubular formation 22 in a manner similar to that performed for the formation of the bottom 13, that is by juxtaposing the faces 4 and 5 of the tubular formation with interposition of the minor faces 6 and 7 sunk inwards and joining the layers of the formed package.
  • this operation is carried out by means of the formation of two transverse seams 19 that determine a cartouche 14 at the upper end of the finished bag 1.
  • the step F will preferably comprise a cross-sectional operation of the package formed by the tubular formation 22 and the tubular mesh 16 coinciding with the transverse seam 19 arranged at a higher level.
  • the transverse seams 19 can be made directly by means of heat and pressure, by ultrasound or in other more traditional ways, for example, by stapling or by sewing.
  • Fig. 10 shows a sequence of the final stages of an alternative procedure to that illustrated in Fig. 9.
  • this procedure shown in Fig. 10 it is possible to start from a single or several sheets of sheet material including at least all the options already described for the procedure according to Fig. 9.
  • Fig. 10 differs from the procedure according to Fig. 9 in that, although the reinforcing edges 8 extend along the entire tubular formation 22, the sides of the tubular formation are not sunk in the adjacent portion to the upper end 22a of the tubular formation 22 at the instant in which said tubular formation is closed by its upper end 22a.
  • the upper closure is carried out by juxtaposing the faces 4 and 5 of the tubular formation 22 but without interposition of the minor faces 6 and 7 that are expressly deployed outward and whose two halves they are also juxtaposed and united between yes, as exemplified by stage F.
  • step D comprises pulling the smaller faces 6, 7 out of the tubular formation 22, in the direction indicated by the arrows in the vignette.
  • This operation is preferably carried out once the bottom 13 of the future bag 1 is formed, so as to ensure that these smaller faces 6 and 7 are pleated between the larger faces 4 and 5 of the future bag 1 at the lower end. 22b thereof.
  • the result is a bag 1 whose card 14 offers a larger exposure surface than a bag 1 obtained according to the procedure of Fig. 9.
  • the reinforcement edges 8 nevertheless continue to function and contribute to the upper part of the bag 1 with the card 14 remains in the air.

Abstract

A bag (1) suitable for packaging fruit and vegetable products, obtained from a tubular formation (22) closed at the ends thereof (22a, 22b) and manipulated in order to form on said tubular formation two larger faces (4, 5) and two smaller faces (6, 7) recessed towards the interior of the tubular formation at least along a longitudinal portion of said tubular formation. The smaller faces (6, 7) comprise a reinforcement trim (8) which also extends along the tubular formation, formed by juxtaposing and joining corresponding longitudinal strips (8a, 8b) of the material which forms each smaller face, said reinforcement trim determining a kind of longitudinal appendage which extends along the smaller face and, together with the trim of the other face, helps to maintain the bag in an upright position when it is full and set to stand on its base.

Description

D E S C R I P C I Ó N "Una bolsa apta para el envasado de productos hortofrutícolas"  D E S C R I P C I Ó N "A bag suitable for the packaging of fruit and vegetable products"
Sector técnico de la invención Technical sector of the invention
La presente invención se refiere a una bolsa apta para el envasado de productos hortofrutícolas, tales como cítricos o tubérculos.  The present invention relates to a bag suitable for the packaging of fruit and vegetable products, such as citrus fruits or tubers.
Antecedentes de la invención Background of the invention
En la actualidad existen numerosas propuestas de bolsas para productos hortofrutícolas. De entre todas las propuestas conocidas son de interés aquellas que permiten la obtención de las bolsas en un proceso que comprende también in situ las operaciones de llenado y de cierre de las bolsas. En general, en tales propuestas el material a partir del cual se obtienen las bolsas se suministra de un arrollamiento de material en continuo, del que son sucesivamente estiradas y cortadas las porciones necesarias para confeccionar las bolsas. Un ejemplo cásico son las bolsas de malla, obtenidas a partir de un arrollamiento de malla tubular del que se estiran intermitentemente sucesivas porciones de malla para confeccionar respectivas bolsas y a las que, opcionalmente, se provee en uno o en sus dos laterales de una banda flexible de material plástico que contribuyen a dotar a la bolsa terminada de mejores prestaciones mecánicas y/o a poder realizar el cierre de las bolsas mediante la unión entre sí de porciones del material plástico con interposición de la malla tubular. There are currently numerous proposals for bags for fruit and vegetable products. Among all the known proposals are those that allow obtaining the bags in a process that also includes in situ the operations of filling and closing the bags. In general, in such proposals the material from which the bags are obtained is supplied with a continuous material winding, from which the portions necessary to make the bags are successively stretched and cut. A classic example is the mesh bags, obtained from a wrapping of tubular mesh from which successive portions of mesh are stretched intermittently to make respective bags and which, optionally, is provided on one or both sides of a flexible band of plastic material that contribute to provide the finished bag with better mechanical performance and / or to be able to close the bags by joining together portions of the plastic material with interposition of the tubular mesh.
En convivencia con estas bolsas clásicas de malla también se conocen propuestas más exclusivas en la que la bolsa está formada por una envolvente de un material laminar, por ejemplo, de plástico. Para que estas bolsas sean transpirables, y aptas para envasar productos hortofrutícolas, el material laminar está perforado o presenta una serie de aberturas. En una variante, la envolvente de material laminar está revestida interiormente con una malla que contribuye a confinar los productos en la bolsa, lo que permite aumentar el tamaño de las perforaciones o aberturas practicadas en el material laminar y a seleccionar una forma y distribución a conveniencia, aumentando la libertad creativa en el diseño de las bolsas. Es un objetivo de la invención dar a conocer una bolsa que sea obtenible empleando los métodos más tradicionales, eso es a partiendo de una formación tubular, pero que esté especialmente preparada para mantenerse en una posición erguida cuando la bolsa descanse sobre un estante o similar, apoyada de forma estable sobre su fondo cuando éste viene formado por el cierre inferior de la mencionada formación tubular, por ejemplo, yuxtaponiendo y juntando entre sí las paredes de dicha formación tubular. In coexistence with these classic mesh bags, more exclusive proposals are also known in which the bag is formed by an envelope of a sheet material, for example, plastic. So that these bags are breathable, and suitable for packaging fruit and vegetable products, the sheet material is perforated or has a series of openings. In a variant, the envelope of sheet material is internally coated with a mesh that helps to confine the products in the bag, which allows to increase the size of the perforations or openings made in the sheet material and to select a shape and distribution for convenience, increasing creative freedom in the design of the bags. It is an objective of the invention to disclose a bag that is obtainable using the most traditional methods, that is from a tubular formation, but that is specially prepared to remain in an upright position when the bag rests on a shelf or the like, stably supported on its bottom when it is formed by the lower closure of said tubular formation, for example, by juxtaposing and joining together the walls of said tubular formation.
También es un objetivo de la presente invención alcanzar el propósito antes señalado sin tener que emplear postizos o similares, es decir empleándose el mismo material en lámina que conforma la formación tubular a partir de la cual se obtiene la bolsa. It is also an objective of the present invention to achieve the aforementioned purpose without having to use hairpieces or the like, ie using the same sheet material that forms the tubular formation from which the bag is obtained.
También es un objetivo de la presente invención alcanzar el mismo propósito sin tener que emplear para ello un material en lámina con un espesor sobredimensionado para dotar a la envolvente de la rigidez necesaria para aguantarse erguido. La invención pretende pues dar a conocer una bolsa capaz de mantenerse erguida obtenida a partir de una formación tubular de un material cuyo espesor ha sido seleccionado para resistir el peso del producto cuando la bolsa es transportada suspendida, sin estar dicha selección condicionada para aumentar la habitual rigidez de la bolsa. Aumentar el espesor del material para asegurar que la bolsa de mantenga erguida supone un aumento de la cantidad de material y en consecuencia del coste de obtención por unidad de bolsa, aspectos que se pretenden evitar o atenuar. It is also an objective of the present invention to achieve the same purpose without having to use for this purpose a sheet material with an oversized thickness to provide the envelope with the rigidity necessary to stand upright. The invention thus aims to make known a bag capable of standing up obtained from a tubular formation of a material whose thickness has been selected to resist the weight of the product when the bag is transported suspended, without said selection being conditioned to increase the usual stiffness of the bag. Increasing the thickness of the material to ensure that the bag held up is an increase in the amount of material and, consequently, the cost of obtaining per bag unit, aspects that are intended to be avoided or attenuated.
Es también un objetivo de la invención un procedimiento de obtención de la bolsa sencillo, que pueda ser puesto en práctica adaptando fácilmente las máquinas existentes para fabricar y llenar bolsas a partir de un material tubular. It is also an object of the invention to obtain a simple bag, which can be put into practice by easily adapting the existing machines for manufacturing and filling bags from a tubular material.
El proceso debe ser fácilmente adaptable para varios tipos de bolsas y por lo tanto versátil. Por ejemplo, debe compartir el máximo número de operaciones posibles entre una variante que permita obtener bolsas en las que la envolvente del producto que almacenan está compuesta en su totalidad por un material en lámina; y otra variante en la que se combina un material en lámina y una malla. Explicación de la invención The process must be easily adaptable for various types of bags and therefore versatile. For example, you should share the maximum number of possible operations between a variant that allows you to obtain bags in which the envelope of the product you store is composed entirely of a sheet material; and another variant in which a sheet material and a mesh are combined. Explanation of the invention.
La bolsa que se propone es del tipo que está obtenida a partir de una formación tubular de un material en lámina cerrada por sus extremos para formar un fondo y una cartela superior, distinguiéndose en la citada formación tubular dos caras mayores y dos caras menores, de enlace entre las dos caras mayores a lo largo de al menos una porción longitudinal de dicha formación tubular.  The proposed bag is of the type that is obtained from a tubular formation of a sheet material closed at its ends to form a bottom and an upper cartouche, distinguishing in the said tubular formation two major faces and two minor faces, of bond between the two major faces along at least a longitudinal portion of said tubular formation.
En esencia, la bolsa se caracteriza porque las caras menores comprenden un ribete de refuerzo, que se extiende además a lo largo de la formación tubular, formado por la yuxtaposición y unión de sendas franjas longitudinales del material que conforma cada cara menor; y porque las caras menores han sido manipuladas para presentar dobleces longitudinales y adoptar su sección transversal una forma hundida hacia el interior de la formación tubular, determinando cada ribete de refuerzo una suerte de apéndice longitudinal que se extiende a lo largo de la cara menor asociada y que contribuye con el ribete de la otra cara a que la bolsa quede en posición erguida cuando se coloca llena apoyada sobre su fondo. In essence, the bag is characterized in that the minor faces comprise a reinforcing edging, which also extends along the tubular formation, formed by the juxtaposition and joining of longitudinal strips of the material that make up each minor face; and because the minor faces have been manipulated to present longitudinal folds and adopt their cross section a sunken shape towards the inside of the tubular formation, each reinforcement rim determining a kind of longitudinal appendix that extends along the associated minor face and which contributes with the edging of the other side so that the bag is in an upright position when it is placed full supported on its bottom.
La invención prevé que la formación tubular esté formada por una única o por más de una hoja del material en lámina dando lugar a diferentes alternativas para formar los ribetes. The invention provides that the tubular formation is formed by a single or more than one sheet of the sheet material giving rise to different alternatives to form the edges.
Así, en una variante las franjas longitudinales yuxtapuestas y unidas que forman los ribetes de refuerzo son porciones de diferentes hojas (A, B) de material en lámina, siendo preferentemente franjas longitudinales extremas o en la orilla de dichas hojas. Thus, in a variant the juxtaposed and joined longitudinal strips that form the reinforcing edges are portions of different sheets (A, B) of sheet material, preferably being longitudinal or extreme longitudinal strips at the edge of said sheets.
En otra variante las franjas longitudinales yuxtapuestas y unidas que forman uno de ribetes de refuerzo son franjas de porciones contiguas de una misma hoja (D) de material en lámina mientras que las franjas longitudinales que forman el otro de los ribetes son franjas longitudinales de orillas opuesta de esta misma hoja (D). In another variant, the juxtaposed and joined longitudinal strips that form one of reinforcing edges are strips of contiguous portions of the same sheet (D) of sheet material while the longitudinal strips that form the other of the edges are opposite strips of opposite edges of this same sheet (D).
En otra variante los dos pares de franjas longitudinales yuxtapuestas y unidas que forman cada uno un ribete de refuerzo son franjas de porciones contiguas de una misma hoja (D) de material en lámina de sección cerrada, obtenida por ejemplo mediante técnicas de soplado. In another variant the two pairs of juxtaposed and joined longitudinal stripes each forming a reinforcement border are portion strips adjacent to the same sheet (D) of closed section sheet material, obtained for example by blowing techniques.
Es preferible que cada ribete de refuerzo quede en cualquier caso dispuesto centrado en su cara menor asociada. It is preferable that each reinforcement trim is in any case arranged centered on its associated minor face.
En un caso en el que la formación tubular está formada por dos hojas (A, B) de material en lámina, la invención prevé disponer las hojas enfrentadas y unidas por sus bordes longitudinales, determinando la porción central de cada hoja una de las caras mayores y a cada lado una mitad de una cara menor de la formación tubular. In a case in which the tubular formation is formed by two sheets (A, B) of sheet material, the invention provides the sheets facing and joined by their longitudinal edges, the central portion of each sheet determining one of the major faces and on each side a half of a smaller face of the tubular formation.
Preferentemente, cada hoja (A, B) presenta una serie de pliegues longitudinales, comprendiendo dos pliegues principales que se extienden al menos a lo largo de una porción de la formación tubular (22), en torno a los cuales cada hoja está plegada en dirección a la hoja enfrentada y que delimitan entre los dos una correspondiente cara mayor de la formación tubular; y dos pliegues extremos que se extienden a lo largo de la formación tubular, próximos a sendos cantos de la hoja, que determinan cada uno con la orilla de la hoja asociada la franja longitudinal de material de una mitad de cara menor que unida a la franja longitudinal análoga de su mitad complementaria forma un ribete de refuerzo. Preferably, each sheet (A, B) has a series of longitudinal folds, comprising two main folds that extend at least along a portion of the tubular formation (22), around which each sheet is folded in the direction to the opposite sheet and that delimit between them a corresponding major face of the tubular formation; and two extreme folds that extend along the tubular formation, next to two edges of the sheet, each determining with the edge of the sheet associated the longitudinal strip of material of a half face smaller than attached to the strip Longitudinal analog of its complementary half forms a reinforcing edging.
Preferentemente, los ribetes de refuerzo se extienden hacia el exterior de la formación tubular, eso es entre las dos mitades de cada cara menor en el caso de que la formación tubular esté formada por dos hojas (A, B). Preferably, the reinforcement edges extend outward from the tubular formation, that is between the two halves of each minor face in the event that the tubular formation is formed by two sheets (A, B).
Los ribetes de refuerzo también pueden extenderse hacia el interior de la formación tubular. Reinforcement piping can also extend into the tubular formation.
Se prevé, como se explica en mayor detalle más adelante, que las caras menores estén hundidas hacia el interior de la formación tubular a lo largo de toda la longitud de la formación tubular, incluyéndose sus extremos, o únicamente a lo largo de una porción longitudinal de la misma. Asimismo, la anchura de los ribetes de refuerzo puede no ser constante a lo largo de la formación tubular. It is envisaged, as explained in greater detail below, that the smaller faces are sunk into the tubular formation along the entire length of the tubular formation, including its ends, or only along a longitudinal portion. Of the same. Also, the width of the reinforcing edges may not be constant along the tubular formation.
Asimismo, la anchura de las caras menores en aquella porción de la formación tubular a lo largo de la cual están hundidas hacia el interior puede no ser constante a lo largo de dicha formación tubular. Likewise, the width of the smaller faces in that portion of the tubular formation along which they are sunk inwardly may not be constant along said tubular formation.
En una variante de la invención, el material en lámina a partir del cual se obtiene la formación tubular tiene o se dota de al menos una ventana o abertura. In a variant of the invention, the sheet material from which the tubular formation is obtained has or is provided with at least one window or opening.
Dicha al menos una ventana o abertura está preferiblemente ubicada en una cara mayor de la formación tubular. Said at least one window or opening is preferably located on a larger face of the tubular formation.
De acuerdo con una variante de la invención, la formación tubular está al menos parcialmente revestida, por dentro o por fuera, con un material de malla. According to a variant of the invention, the tubular formation is at least partially coated, inside or out, with a mesh material.
El material de malla puede tener la forma de malla tubular de forma que ajusta por dentro o por fuera de la citada formación tubular de material en lámina. The mesh material may be in the form of a tubular mesh such that it fits inside or outside the said tubular formation of sheet material.
La invención prevé que la formación tubular esté únicamente revestida por la parte coincidente con la ventana o abertura, de forma que el material de malla cierra o cubre dicha abertura. The invention provides that the tubular formation is only covered by the part coinciding with the window or opening, so that the mesh material closes or covers said opening.
En una variante, la formación tubular está cerrada por sus extremos mediante la yuxtaposición y unión de los cantos superior e inferior de sus caras mayores, con interposición de las caras menores plegadas sobre sí mismas entre dichas caras mayores en uno o en ambos de sus extremos. In a variant, the tubular formation is closed at its ends by juxtaposing and joining the upper and lower edges of its major faces, with interposition of the smaller faces folded on themselves between said major faces on one or both of its ends. .
Según otro aspecto de la invención, se da a conocer un procedimiento para la fabricación de una bolsa apta para el envasado de productos hortofrutícolas, comprendiendo el procedimiento las operaciones de According to another aspect of the invention, a process for the manufacture of a bag suitable for the packaging of fruit and vegetable products is disclosed, the process comprising the operations of
a) obtener una formación tubular de un material en lámina con al menos dos ribetes de refuerzo, que se extienden a lo largo de la formación tubular, formados por la yuxtaposición y unión de sendas franjas longitudinales del material que conforma la citada formación tubular, y con dobleces que se extienden longitudinalmente a lo largo de al menos una porción de la formación tubular determinando en ella dos caras mayores enfrentadas y dos caras menores hundidas hacia el interior de la formación tubular de enlace entre las caras mayores y en coincidencia con los ribetes de refuerzo, de forma que al menos un ribete de refuerzo queda dispuesto en el fondo de cada cara menor hundida determinando una suerte de apéndice longitudinal; y a) obtain a tubular formation of a sheet material with at least two reinforcing edges, which extend along the tubular formation, formed by the juxtaposition and joining of longitudinal strips of the material that conforms the said tubular formation, and with folds that extend longitudinally along at least a portion of the tubular formation determining therein two faces facing each other and two smaller faces sunk into the interior of the tubular link formation between the larger faces and in coincidence with the reinforcement piping, so that at least one reinforcement piping is arranged at the bottom of each sunken minor face determining a kind of longitudinal appendix; Y
b) confinar una cantidad de un producto en el interior de la formación tubular mediante la realización de al menos una primera y una segunda costuras transversales de cierre en la formación tubular practicadas al menos una a cada lado del volumen de producto. b) confine an amount of a product inside the tubular formation by performing at least one first and a second transverse closure seams in the tubular formation practiced at least one on each side of the product volume.
El material en lámina que constituye la formación tubular puede tener o puede dotarse de al menos una abertura y en el interior de la formación tubular puede estar longitudinalmente introducida, extendiéndose entre la primera y la segunda costuras transversales, una malla tubular en cuyo interior queda confinado el producto. The sheet material constituting the tubular formation can have or can be provided with at least one opening and inside the tubular formation it can be longitudinally inserted, extending between the first and second transverse seams, a tubular mesh in which the interior is confined the product.
La invención contempla que los ribetes de refuerzo se formen en el material en lámina que constituye la formación tubular con carácter previo a realizar las dobleces longitudinales que determinan las caras menores hundidas hacia el interior de la citada formación tubular. The invention contemplates that the reinforcement edges are formed in the sheet material that constitutes the tubular formation prior to making the longitudinal folds that determine the smaller sunken faces towards the interior of said tubular formation.
Breve descripción de los dibujos Brief description of the drawings
Las Figs. 1 y 2 muestran dos variantes de una bolsa según la invención; Figs. 1 and 2 show two variants of a bag according to the invention;
La Fig. 3a, es una vista en perspectiva y esquemática que muestra simultáneamente cómo puede obtenerse y la forma general que puede adoptar una formación tubular a partir de la cual es confeccionable una bolsa según la invención, en el ejemplo a partir de dos hojas de un material en lámina; Fig. 3a is a perspective and schematic view that simultaneously shows how it can be obtained and the general shape that a tubular formation can take from which a bag according to the invention can be made, in the example from two sheets of a sheet material;
La Fig. 3b, es una vista en planta de la Fig. 3a, que viene a ilustrar la sección transversal que adoptará la formación tubular en el caso de la Fig. 3a;  Fig. 3b, is a plan view of Fig. 3a, which illustrates the cross section that will take the tubular formation in the case of Fig. 3a;
Las Figs. 4, 5, 6, 7 y 8 son sendas secciones transversales de otras tantas formaciones tubulares alternativas a la de la Figs. 3b y que también contempla la invención; La Fig. 9 muestra una secuencia de varias etapas en la fabricación de una bolsa según la invención, habiéndose ilustrado diferentes alternativas para la obtención de la formación tubular que será manipulada en las etapas ilustradas; yFigs. 4, 5, 6, 7 and 8 are cross sections of as many alternative tubular formations as in Figs. 3b and which also contemplates the invention; Fig. 9 shows a sequence of several stages in the manufacture of a bag according to the invention, different alternatives having been illustrated for obtaining the tubular formation that will be manipulated in the illustrated stages; Y
La Fig. 10 muestra otra secuencia de varias etapas finales en la fabricación de una bolsa según la invención, como una alternativa a la secuencia representada en la Fig. 9. Fig. 10 shows another sequence of several final stages in the manufacture of a bag according to the invention, as an alternative to the sequence depicted in Fig. 9.
Descripción detallada de la invención Detailed description of the invention
Las Figs. 1 y 2 muestran dos variantes de una bolsa 1 según la invención. Las bolsas 1 están obtenidas, como se explicará en detalle más adelante, a partir de una formación tubular de un material en lámina y cerrada por sus extremos para formar un fondo 13 y una cartela superior 14. Previamente a su cierre esta formación tubular habrá sido manipulada para doblar longitudinalmente dos porciones enfrentadas hacia el interior de la formación tubular y promover así sendos hundimientos laterales que determinarán en la formación tubular dos caras mayores 4 y 5 (de las que sólo es visible la cara 4 en las Figs. 1 y 2) y dos caras menores 6, 7. Es característico en estas bolsas 1 que en el fondo de estos hundimientos, eso es en cada una de las caras menores 6 y 7, estén formados unos ribetes de refuerzo 8 que se extienden longitudinalmente y que contribuyen a que las bolsas 1 permanezcan erguidas, de forma similar a como han sido dibujadas en las Figs. 1 y 2, cuando se apoyan sobre el fondo 13. Ventajosamente, las bolsas 1 no sólo se mantienen erguidas, sino que la parte superior de las mismas, aunque esté vacía de producto, se mantenga tiesa o enhiesta y por tanto la cartela 14 queda dispuesta vertical. Este efecto es de interés en el caso de que la cartela 14 sea empleada para incorporar accesorios, tales como un asa, o soportar información publicitaria o relativa al producto contenido en las bolsas 1.  Figs. 1 and 2 show two variants of a bag 1 according to the invention. The bags 1 are obtained, as will be explained in detail below, from a tubular formation of a sheet material and closed at its ends to form a bottom 13 and a top cartouche 14. Prior to its closure this tubular formation will have been manipulated to longitudinally bend two portions facing towards the inside of the tubular formation and thus promote two lateral sinks that will determine in the tubular formation two major faces 4 and 5 (of which only face 4 is visible in Figs. 1 and 2) and two minor faces 6, 7. It is characteristic in these bags 1 that at the bottom of these sinks, that is in each of the minor faces 6 and 7, reinforcement ribs 8 are formed that extend longitudinally and contribute to that the bags 1 remain upright, similar to how they have been drawn in Figs. 1 and 2, when they rest on the bottom 13. Advantageously, the bags 1 not only remain erect, but the upper part thereof, even if it is empty of the product, remains stiff or thickened and therefore the card 14 remains arranged vertically This effect is of interest in the event that the card 14 is used to incorporate accessories, such as a handle, or to support advertising or information related to the product contained in the bags 1.
En la bolsa 1 de la Fig. 1 , el material en lámina está perforado en sus caras mayores y presenta una serie de aberturas 12 que permiten la aireación de la bolsa, lo que la hace apta para productos perecederos. In the bag 1 of Fig. 1, the sheet material is perforated in its larger faces and has a series of openings 12 that allow the aeration of the bag, which makes it suitable for perishable products.
En la bolsa 1 de la Fig. 2, las aberturas 12 son mayores y en la confección de la bolsa 1 se ha utilizado también un material de malla 15, que en el ejemplo cubre las aberturas 12. La invención prevé que la formación tubular que interviene en la obtención de las bolsas 1 esté formada por una única hoja de un material laminar o por más de una hoja. In the bag 1 of Fig. 2, the openings 12 are larger and in the construction of the bag 1 a mesh material 15 has also been used, which in the example covers the openings 12. The invention provides that the tubular formation involved in obtaining the bags 1 is formed by a single sheet of a sheet material or by more than one sheet.
Las Figs. 3a y 3b ilustran esquemáticamente una posible forma de obtención de una formación tubular 22; cómo se forman estos ribetes de refuerzo 8; y cuál será su particular disposición, en el caso de que la formación tubular 22 esté formada a partir de dos hojas A y B de un material en lámina. Siendo esquemáticas, las proporciones y/o dimensiones relativas que se muestran en estos dibujos pueden estar exageradas para poder identificar mejor los pliegues y las zonas a unir entre sí para alcanzar la formación tubular. Figs. 3a and 3b schematically illustrate a possible way of obtaining a tubular formation 22; how these reinforcement trims are formed 8; and what will be its particular arrangement, in the event that the tubular formation 22 is formed from two sheets A and B of a sheet material. Being schematic, the proportions and / or relative dimensions shown in these drawings may be exaggerated to be able to better identify the folds and the areas to be joined together to reach the tubular formation.
En concreto, la Fig. 3a muestra una primera hoja A y una segunda hoja B de un material en lámina, convenientemente dobladas y unidas a lo largo de sus cantos laterales como sigue: Specifically, Fig. 3a shows a first sheet A and a second sheet B of a sheet material, conveniently folded and joined along its side edges as follows:
La hoja A presenta dos pliegues principales 10 en torno a los cuales la hoja A se dobla en dirección a la hoja enfrentada, delimitándose entre estos pliegues principales 10 una cara mayor 4 de la formación tubular 22 y a cada lado una mitad 6a y 7a de una cara menor 6, 7 de la citada formación tubular 22; y dos pliegues extremos 1 1 , próximos a sendos cantos de la hoja, que determinan cada uno una franja longitudinal 8a en una orilla de la hoja A. The sheet A has two main folds 10 around which the sheet A bends in the direction of the facing sheet, between these main folds 10 defining a larger face 4 of the tubular formation 22 and on each side a half 6a and 7a of a minor face 6, 7 of said tubular formation 22; and two extreme folds 1 1, close to two edges of the sheet, each determining a longitudinal strip 8a on one edge of the sheet A.
La hoja B presenta también similares pliegues principales 10 en torno a los cuales la hoja B se dobla en dirección a la hoja enfrentada, que delimitan en este caso la otra cara mayor 5 de la formación tubular 22 y a cada lado las mitades 6b, 7b complementarias de las caras menores 6, 7 de la formación tubular 22; y dos pliegues extremos 11 , análogos a los pliegues 1 1 de la hoja A, próximos a sendos cantos de la hoja que determinan cada uno una franja longitudinal 8b en una orilla de la hoja B.  Sheet B also has similar main folds 10 around which sheet B bends in the direction of the facing sheet, which in this case delimits the other major face 5 of the tubular formation 22 and on each side the complementary halves 6b, 7b of the smaller faces 6, 7 of the tubular formation 22; and two extreme folds 11, analogous to the folds 1 1 of the sheet A, next to two edges of the sheet each determining a longitudinal strip 8b on one edge of the sheet B.
Cada una de las dos franjas longitudinales 8a de la hoja A está yuxtapuesta y unida a una de las dos franjas longitudinales 8b de la hoja B, formándose así dos ribetes de refuerzo 8 que en el ejemplo (ver Fig. 3b) se proyectan hacia afuera de la formación tubular 22. Es importante destacar que la unión de cada par de franjas 8a y 8b puede ser anterior o posterior a formar los pliegues principales 10 y que en la Fig. 3a las franjas 8a y 8b cuya unión forma un correspondiente ribete de refuerzo 8 se han ilustrado enfrentadas, pero no unidas, para facilitar la explicación de la invención. Each of the two longitudinal stripes 8a of the sheet A is juxtaposed and joined to one of the two longitudinal strips 8b of the sheet B, thus forming two reinforcing edges 8 which in the example (see Fig. 3b) project outwards of tubular formation 22. It is important to note that the union of each pair of strips 8a and 8b can be anterior or subsequent to form the main folds 10 and that in Fig. 3a the strips 8a and 8b whose union forms a corresponding reinforcement border 8 have been shown facing each other. , but not joined, to facilitate the explanation of the invention.
En Fig. 3b se ha señalado mediante una trama por puntos precisamente dónde se efectuará la unión entre las hojas A y B para formar los ribetes de refuerzo 8. In Fig. 3b it has been indicated by a dotted plot precisely where the joint between the sheets A and B will be made to form the reinforcement edges 8.
Las Fig. 4 a 8 muestran formaciones tubulares 22 alternativas a la que se ilustra en la Fig. 3b y en ellas se han utilizado las mismas referencias numéricas para señalar similares características técnicas a aquellas identificadas en las Figs. 3a y 3b anteriores. Figs. 4 to 8 show alternative tubular formations 22 to that illustrated in Fig. 3b and in them the same numerical references have been used to indicate similar technical characteristics to those identified in Figs. 3a and 3b above.
En el ejemplo de la Fig. 5, la formación tubular 22 está constituida de origen por una única hoja D de material en lámina pudiéndose obtener mediante técnicas de soplado. Dos laterales de la formación tubular 22 han sido hundidos hacia el interior para determinar las caras menores 6, 7; y en el fondo de estos hundimientos que determinan las caras menores 6, 7 están formados los ribetes de refuerzo 8 en este caso por yuxtaposición y unión de franjas longitudinales contiguas ya de origen en la misma hoja D. En este caso, la hoja D presenta sendos pliegues 1 1 ' que conjuntamente con los pliegues 11 y 10 permiten plisar la formación tubular 22 hasta adoptar una forma con la sección trasversal representada en dicha Fig. 5. In the example of Fig. 5, the tubular formation 22 is originally constituted by a single sheet D of sheet material which can be obtained by blowing techniques. Two laterals of the tubular formation 22 have been sunk inwards to determine the smaller faces 6, 7; and at the bottom of these sinks that determine the smaller faces 6, 7, the reinforcement edges 8 are formed in this case by juxtaposition and joining of adjacent longitudinal strips already of origin in the same sheet D. In this case, sheet D has two folds 1 1 'which together with the folds 11 and 10 allow the tubular formation 22 to be pleated until it adopts a shape with the cross section represented in said Fig. 5.
En el ejemplo de la Fig. 4, la formación tubular 22 está constituida también de una única hoja D de material en lámina, pero en este caso no tubular de origen. En este ejemplo, un ribete de refuerzo 8, que queda dispuesto a la derecha de la imagen, está formado por la unión de dos franjas de orillas opuestas en la hoja D mientras que el otro ribete de refuerzo 8, que queda dispuesto a la izquierda de la imagen, está formado por la yuxtaposición y unión de dos franjas contiguas de origen en la hoja D, para lo cual deberá formarse un pliegue 11 ' análogo a los de la Fig. 5. Otras alternativas vienen ilustradas en las Figs. 6 a 8 las cuales muestran que la invención contempla que los ribetes de refuerzo 8 se proyecten hacia el interior de la formación tubular 22. Esta opción es compatible cuando los ribetes de refuerzo 8 están formados por la unión de hojas diferentes (ver Fig. 6); por la yuxtaposición y unión de franjas longitudinales contiguas de una misma hoja (ver Fig. 7); o una mezcla de ambos casos (ver Fig. 8). In the example of Fig. 4, the tubular formation 22 is also constituted of a single sheet D of sheet material, but in this case non-tubular of origin. In this example, a reinforcing edging 8, which is arranged to the right of the image, is formed by the union of two strips of opposite edges on the sheet D while the other reinforcing edging 8, which is arranged on the left of the image, it is formed by the juxtaposition and union of two contiguous strips of origin on sheet D, for which a fold 11 'analogous to those of Fig. 5 should be formed. Other alternatives are illustrated in Figs. 6 to 8 which show that the invention contemplates that the reinforcement edges 8 project into the interior of the tubular formation 22. This option is compatible when the reinforcement edges 8 are formed by joining different sheets (see Fig. 6 ); for the juxtaposition and joining of adjacent longitudinal strips of the same sheet (see Fig. 7); or a mixture of both cases (see Fig. 8).
La Fig. 9 muestran una secuencia de las etapas B a F que pueden seguirse en un procedimiento de obtención de una bolsa 1 , en concreto de una bolsa 1 según el ejemplo de la Fig. 2. El procedimiento de la Fig. 9 puede partir de una única o de más hojas de material en lámina, como ilustran las opciones A1 , A2 y A3, para obtener la formación tubular 22 que se muestra en la etapa D. Es característico de este procedimiento de obtención de la bolsa 1 que los ribetes de refuerzo 8 se forman en el material en lámina que constituye la formación tubular 22 antes de haber hundido los laterales enfrentados que determinan las caras menores 6, 7. Fig. 9 shows a sequence of steps B to F that can be followed in a procedure for obtaining a bag 1, in particular a bag 1 according to the example of Fig. 2. The procedure of Fig. 9 can start of a single or more sheets of sheet material, as options A1, A2 and A3 illustrate, to obtain the tubular formation 22 shown in step D. It is characteristic of this procedure for obtaining the bag 1 that the trims reinforcement 8 are formed in the sheet material that constitutes the tubular formation 22 before having sunk the facing sides that determine the smaller faces 6, 7.
También es característico del procedimiento ilustrado que la formación tubular 22 presenta dos ventanas o aberturas 12, dispuestas enfrentadas cada una en una cara mayor 4 y 5 de la formación tubular 22, aberturas que posteriormente serán cubiertas por una malla 15 para lo cual se emplea, en este ejemplo, una malla tubular 16. Estas aberturas 12 pueden estar realizadas de origen en el material en lámina que se manipula para obtener la formación tubular 22. Aunque no venga representado, además de venir ya formadas estas aberturas 12 en el material en lámina que se manipula para obtener la formación tubular 22 también se prevé que dichas aberturas estén cubiertas por un material de malla 15. El suministro de material en lámina con estas particularidades es conocido incluso para la fabricación de bolsas parecidas a las que se refiere la invención, eso es con dos caras mayores y dos caras menores de enlace entre las caras mayores. Un ejemplo de este tipo de material en lámina está descrito en el documento de patente WO2008040826. It is also characteristic of the illustrated procedure that the tubular formation 22 has two windows or openings 12, each facing each other on a larger face 4 and 5 of the tubular formation 22, openings that will later be covered by a mesh 15 for which it is used, in this example, a tubular mesh 16. These openings 12 can be made originally in the sheet material that is manipulated to obtain the tubular formation 22. Although it is not represented, in addition to these openings 12 already formed in the sheet material which is manipulated to obtain the tubular formation 22 it is also provided that said openings are covered by a mesh material 15. The supply of sheet material with these particularities is known even for the manufacture of similar bags to which the invention refers, that is with two major faces and two minor faces of link between the major faces. An example of this type of sheet material is described in WO2008040826.
Más en detalle, en la etapa B se procura un tubo 2 de material en lámina con dos aberturas 12 en caras enfrentadas. El tubo 2 presenta dos costuras laterales que determinan sendos ribetes de refuerzo 8. En función de cual sean las características del material de partida estos ribetes de refuerzo 8 se obtendrán de un modo u otro. More in detail, in stage B, a tube 2 of sheet material with two openings 12 on opposite faces is provided. Tube 2 has two seams sides that determine reinforcement ribs 8. Depending on the characteristics of the starting material, these reinforcement ribs 8 will be obtained in one way or another.
Partiendo de la opción A1 , los ribetes de refuerzo 8 se obtendrán aplanándose el tubo 2 de partida y aplastando y uniendo entre sí los bordes longitudinales del mismo. Starting from option A1, the reinforcement edges 8 will be obtained by flattening the starting tube 2 and crushing and joining the longitudinal edges thereof.
Partiendo de la opción A2, los ribetes de refuerzo 8 se obtendrán yuxtaponiendo las hojas A y B y uniéndolas entre sí a lo largo de sus bordes longitudinales. Starting from option A2, the reinforcement edges 8 will be obtained by juxtaposing the sheets A and B and joining them together along their longitudinal edges.
Partiendo de la opción A3, se plegará la hoja D de partida sobre sí misma haciéndose coincidir sus bordes longitudinales los cuales serán unidos entre sí a la vez que se aplastarán y unirán entre sí las franjas longitudinales contiguas que quedan a cada lado del pliegue. Starting from option A3, the starting sheet D will be folded over itself, making its longitudinal edges coincide, which will be joined together while crushing and joining together the adjacent longitudinal strips remaining on each side of the fold.
En la etapa C, se insertará una malla tubular 16 en el tubo 2. En una variante, la malla tubular 16 y el tubo 2 se unirán a lo largo de una serie de costuras longitudinales, ejemplificadas por las costuras 17 en el dibujo de la etapa C, simétricamente dispuestas respecto de las aberturas 12. In step C, a tubular mesh 16 will be inserted into the tube 2. In a variant, the tubular mesh 16 and the tube 2 will be joined along a series of longitudinal seams, exemplified by the seams 17 in the drawing of the stage C, symmetrically arranged with respect to the openings 12.
En la etapa D se hunden hacia el interior dos laterales del tubo 2 coincidiendo con los ribetes de refuerzo 8, de forma que se obtiene la formación tubular 22 con sus características caras mayores 4 y 5 y sus dos caras menores 6 y 7 hundidas hacia dentro. En el ejemplo, cada cara menor 6, 7 presenta en sección transversal una forma general en V quedando dispuesto el ribete de refuerzo 8 en el vértice de la V, en este caso orientado hacia el exterior de la formación tubular 22. En la etapa D se procede asimismo a la formación del fondo 13 de la futura bolsa 1 , yuxtaponiendo entre sí las caras mayores 4 y 5 con interposición de las porciones hundidas, es decir con interposición de las caras menores 6 y 7 plegadas por la mitad, y uniéndolas formando una costura transversal, ejemplificada en el dibujo por la costura transversal 18. La etapa D preferentemente comprenderá una operación de corte transversal del paquete formado por la formación tubular 22 y la malla tubular 16 coincidiendo con esta costura transversal 18. In stage D two sides of the tube 2 sink inwards coinciding with the reinforcement edges 8, so that the tubular formation 22 is obtained with its characteristic major faces 4 and 5 and its two minor faces 6 and 7 sunk inwards . In the example, each minor face 6, 7 has a general V-shaped cross-section, the reinforcing edging 8 being arranged at the apex of the V, in this case facing outwardly of the tubular formation 22. In step D It also proceeds to the formation of the bottom 13 of the future bag 1, juxtaposing the major faces 4 and 5 with interposition of the sunken portions, that is to say with the interposition of the minor faces 6 and 7 folded in half, and joining them forming a transverse seam, exemplified in the drawing by transverse seam 18. Step D will preferably comprise a cross-sectional operation of the package formed by the tubular formation 22 and the tubular mesh 16 coinciding with this transverse seam 18.
Con carácter preferido, la formación tubular 22 es de material plástico termo soldable. Materiales adecuados pueden ser polietileno, polipropileno, poliéster, papel o una combinación de éstos. El material puede comprender varias capas o estratos, cada una de una composición diferente, preferentemente de un material seleccionado del listado anterior. El grosor de la formación tubular 22 puede estar comprendido entre 25 y 150 mieras. Preferably, the tubular formation 22 is made of thermo weldable plastic material. Suitable materials may be polyethylene, polypropylene, polyester, paper or a combination of these. The material may comprise several layers or layers, each of a different composition, preferably of a material selected from the above listing. The thickness of the tubular formation 22 may be between 25 and 150 microns.
En el ejemplo, la malla tubular 16 es también una malla plástica de material termo soldable. A partir del material y del grosor seleccionado para la malla tubular 16 y para obtener la formación tubular 22 el experto podrá estimar o encontrar la temperatura de fusión óptima de estos materiales para, en la etapa D, formar con medios conocidos la costura transversal 18 que cerrará inferiormente dicha formación tubular 22 con la malla tubular 16 introducida. La unión que permite formar esta costura transversal 18 puede realizarse directamente mediante aporte de calor y presión, por ultrasonidos o de otras formas más tradicionales, por ejemplo, por grapado o por cosido. In the example, the tubular mesh 16 is also a plastic mesh of thermo weldable material. From the material and the thickness selected for the tubular mesh 16 and to obtain the tubular formation 22 the expert can estimate or find the optimum melting temperature of these materials to, in step D, form with known means the transverse seam 18 which it will lower said tubular formation 22 with the inserted tubular mesh 16. The joint that allows this transverse seam 18 to be formed can be made directly by means of heat and pressure, by ultrasound or other more traditional forms, for example, by stapling or by sewing.
En la etapa E, cerrada la formación tubular 22 por un extremo inferior 22b se puede proceder a la introducción a través de una abertura en la malla tubular 16 de la cantidad requerida o seleccionada de producto 20 dentro de dicha malla tubular 16 de forma que quedará confinado el producto dentro de ésta y envuelto más exteriormente por la formación tubular 22. In step E, the tubular formation 22 closed at a lower end 22b can be introduced through an opening in the tubular mesh 16 of the required or selected amount of product 20 into said tubular mesh 16 so that it will remain confined the product inside it and wrapped more externally by tubular formation 22.
Repárese que el producto 20 tenderá por gravedad a ocupar la parte inferior de la formación tubular 22 cerrada inferiormente, apoyado sobre el fondo 13 de la futura bolsa 1 , lo que provocará la expansión de la bolsa 1 atenuando el hundimiento de las caras laterales 6 y 7 en la parte inferior de dicha bolsa 1. Asimismo, el fondo 13 se verá aplanado cuando la bolsa 1 descanse sobre dicho fondo, lo que provoca un efecto de aplastamiento de los ribetes de refuerzo 8 que quedarán adosados a la superficie de la cara menor asociada 6 o 7. Este efecto se verá compensado en el extremo contrario de la bolsa 1 una vez terminada, de forma que los ribetes de refuerzo 8 quedarán dispuestos verticales y ligeramente levantados respecto de la superficie de las caras menores 6 y 7. Note that the product 20 will tend by gravity to occupy the lower part of the tubular formation 22 closed lower, supported on the bottom 13 of the future bag 1, which will cause the expansion of the bag 1 attenuating the sinking of the lateral faces 6 and 7 at the bottom of said bag 1. Likewise, the bottom 13 will be flattened when the bag 1 rests on said bottom, which causes a crushing effect of the reinforcement edges 8 that will be attached to the surface of the smaller face associated 6 or 7. This effect will be compensated at the opposite end of the bag 1 once finished, of so that the reinforcement edges 8 will be arranged vertically and slightly raised with respect to the surface of the smaller faces 6 and 7.
La etapa F muestra la realización de la operación de cierre de la formación tubular 22 de una forma similar a la realizada para la formación del fondo 13, eso es yuxtaponiendo las caras 4 y 5 de la formación tubular con interposición de las caras menores 6 y 7 hundidas hacia el interior y uniendo las capas del paquete formado. En el ejemplo esta operación se lleva a cabo mediante la formación de dos costuras transversales 19 que determinan una cartela 14 en el extremo superior de la bolsa 1 terminada. La etapa F preferentemente comprenderá una operación de corte transversal del paquete formado por la formación tubular 22 y la malla tubular 16 coincidiendo con la costura transversal 19 dispuesta a un nivel más elevado. Step F shows the completion of the closing operation of the tubular formation 22 in a manner similar to that performed for the formation of the bottom 13, that is by juxtaposing the faces 4 and 5 of the tubular formation with interposition of the minor faces 6 and 7 sunk inwards and joining the layers of the formed package. In the example this operation is carried out by means of the formation of two transverse seams 19 that determine a cartouche 14 at the upper end of the finished bag 1. The step F will preferably comprise a cross-sectional operation of the package formed by the tubular formation 22 and the tubular mesh 16 coinciding with the transverse seam 19 arranged at a higher level.
Al igual que la costura transversal 18, las costuras transversales 19 pueden realizarse directamente mediante aporte de calor y presión, por ultrasonidos o de otras formas más tradicionales, por ejemplo, por grapado o por cosido. Like the transverse seam 18, the transverse seams 19 can be made directly by means of heat and pressure, by ultrasound or in other more traditional ways, for example, by stapling or by sewing.
La Fig. 10 muestra una secuencia de las etapas finales de un procedimiento alternativo al ilustrado en la Fig. 9. Para este procedimiento mostrado en la Fig. 10 es posible partir de una única o de varias hojas de material en lámina incluyendo al menos todas las opciones ya descritas para el procedimiento según la Fig. 9. Fig. 10 shows a sequence of the final stages of an alternative procedure to that illustrated in Fig. 9. For this procedure shown in Fig. 10 it is possible to start from a single or several sheets of sheet material including at least all the options already described for the procedure according to Fig. 9.
El procedimiento de la Fig. 10 difiere del procedimiento según la Fig. 9 en que, si bien los ribetes de refuerzo 8 se extienden a lo largo de toda la formación tubular 22, los laterales de la formación tubular no están hundidos en la porción contigua al extremo superior 22a de la formación tubular 22 en el instante en el que se procede a cerrar dicha formación tubular por su extremo superior 22a. The procedure of Fig. 10 differs from the procedure according to Fig. 9 in that, although the reinforcing edges 8 extend along the entire tubular formation 22, the sides of the tubular formation are not sunk in the adjacent portion to the upper end 22a of the tubular formation 22 at the instant in which said tubular formation is closed by its upper end 22a.
En el caso del procedimiento según la Fig. 10, el cierre superior se lleva a cabo yuxtaponiendo las caras 4 y 5 de la formación tubular 22 pero sin interposición de las caras menores 6 y 7 que están expresamente desplegadas hacia el exterior y cuyas dos mitades también están yuxtapuestas y unidas entre sí, tal y como ejemplifica la etapa F. In the case of the procedure according to Fig. 10, the upper closure is carried out by juxtaposing the faces 4 and 5 of the tubular formation 22 but without interposition of the minor faces 6 and 7 that are expressly deployed outward and whose two halves they are also juxtaposed and united between yes, as exemplified by stage F.
Con este propósito, en el ejemplo de la Fig. 10 la etapa D comprende tirar de las caras menores 6, 7 hacia afuera de la formación tubular 22, en la dirección que señalan la flechas en la viñeta. Esta operación se lleva preferiblemente a cabo una vez el fondo 13 de la futura bolsa 1 está formado, de modo que se asegura que estas caras menores 6 y 7 queden plisadas entre las caras mayores 4 y 5 de la futura bolsa 1 en el extremo inferior 22b de la misma. El resultado es una bolsa 1 cuya cartela 14 ofrece una superficie de exposición mayor que la que ofrece una bolsa 1 obtenida según el procedimiento de la Fig. 9. Los ribetes de refuerzo 8 siguen no obstante presentando su función y contribuyen a que la parte superior de la bolsa 1 con la cartela 14 queda enhiesta. For this purpose, in the example of Fig. 10 step D comprises pulling the smaller faces 6, 7 out of the tubular formation 22, in the direction indicated by the arrows in the vignette. This operation is preferably carried out once the bottom 13 of the future bag 1 is formed, so as to ensure that these smaller faces 6 and 7 are pleated between the larger faces 4 and 5 of the future bag 1 at the lower end. 22b thereof. The result is a bag 1 whose card 14 offers a larger exposure surface than a bag 1 obtained according to the procedure of Fig. 9. The reinforcement edges 8 nevertheless continue to function and contribute to the upper part of the bag 1 with the card 14 remains in the air.
En otras formas de proceder, también contempladas, es posible hundir los laterales del tubo 2 a partir del cual se obtiene la formación tubular 22 de una forma variable, eso es hundiendo los laterales hacia el interior para formar las caras menores 6 y 7 únicamente en una porción inferior de la formación tubular 22. El hundimiento de estos laterales puede incluso ser progresivo, más acusado cuanto más cerca esté del extremo inferior de la formación tubular 22. In other ways of proceeding, also contemplated, it is possible to sink the sides of the tube 2 from which the tubular formation 22 is obtained in a variable way, that is by sinking the sides inwards to form the smaller faces 6 and 7 only in a lower portion of the tubular formation 22. The sinking of these laterals may even be progressive, more pronounced the closer it is to the lower end of the tubular formation 22.

Claims

R E I V I N D I C A C I O N E S
1. - Una bolsa (1) apta para el envasado de productos hortofrutícolas, obtenida a partir de una formación tubular (22) de un material en lámina cerrada por sus extremos (22a, 22b) para formar un fondo (13) y una cartela superior (14), distinguiéndose en la citada formación tubular dos caras mayores (4, 5) y dos caras menores (6, 7), de enlace entre las dos caras mayores, a lo largo de al menos una porción longitudinal de dicha formación tubular, caracterizada porque1. - A bag (1) suitable for the packaging of fruit and vegetable products, obtained from a tubular formation (22) of a sheet material closed at its ends (22a, 22b) to form a bottom (13) and a cartouche upper (14), distinguishing in the said tubular formation two major faces (4, 5) and two minor faces (6, 7), of connection between the two major faces, along at least a longitudinal portion of said tubular formation , characterized because
- las caras menores (6, 7) comprenden un ribete de refuerzo (8), que se extiende además a lo largo de la formación tubular, formado por la yuxtaposición y unión de sendas franjas longitudinales (8a, 8b) del material que conforma cada cara menor; y porque - the smaller faces (6, 7) comprise a reinforcing edging (8), which also extends along the tubular formation, formed by the juxtaposition and joining of longitudinal strips (8a, 8b) of the material that makes up each minor face; and because
- las caras menores (6, 7) han sido manipuladas para presentar dobleces longitudinales y adoptar su sección transversal una forma hundida hacia el interior de la formación tubular, determinando cada ribete de refuerzo una suerte de apéndice longitudinal que se extiende a lo largo de la cara menor asociada y que contribuye con el ribete de la otra cara a que la bolsa quede en posición erguida cuando se coloca llena apoyada sobre su fondo.  - the smaller faces (6, 7) have been manipulated to present longitudinal folds and adopt their cross section a sunken shape towards the inside of the tubular formation, each reinforcement rim determining a kind of longitudinal appendix that extends along the length of the associated lower face and that contributes to the edging of the other side so that the bag is in an upright position when it is placed full supported on its bottom.
2. - Una bolsa (1) según la reivindicación anterior, caracterizada porque cada ribete de refuerzo (8) queda dispuesto centrado en su cara menor (6, 7) asociada. 2. - A bag (1) according to the preceding claim, characterized in that each reinforcement rim (8) is arranged centered on its associated minor face (6, 7).
3. - Una bolsa (1) según la reivindicación 1 ó 2, caracterizada porque las franjas longitudinales (8a, 8b) yuxtapuestas y unidas que forman al menos uno de los ribetes de refuerzo (8) son porciones de diferentes hojas (A, B) de material en lámina. 3. - A bag (1) according to claim 1 or 2, characterized in that the longitudinal strips (8a, 8b) juxtaposed and joined that form at least one of the reinforcement edges (8) are portions of different sheets (A, B ) of sheet material.
4. - Una bolsa (1) según una cualquiera de las reivindicaciones anteriores, caracterizada porque las franjas longitudinales (8a, 8b) yuxtapuestas y unidas que forman al menos uno de los ribetes de refuerzo (8) son porciones de una misma hoja (D) de material en lámina. 4. - A bag (1) according to any one of the preceding claims, characterized in that the longitudinal strips (8a, 8b) juxtaposed and joined forming at least one of the reinforcement edges (8) are portions of the same sheet (D ) of sheet material.
5. - Una bolsa (1) según la reivindicación 2 ó 3, caracterizada porque la formación tubular (22) está formada por dos hojas (A, B) de material en lámina, enfrentadas y unidas a lo largo de sus bordes longitudinales, determinando la porción central de cada hoja una de las caras mayores (4, 5) y a cada lado una mitad (6a, 7a; 6b, 7b) de una cara menor (6, 7) de la formación tubular. 5. - A bag (1) according to claim 2 or 3, characterized in that the Tubular formation (22) is formed by two sheets (A, B) of sheet material, facing and joined along its longitudinal edges, the central portion of each sheet determining one of the major faces (4, 5) and each side one half (6a, 7a; 6b, 7b) of a smaller face (6, 7) of the tubular formation.
6. - Una bolsa (1) según la reivindicación anterior, caracterizada porque cada hoja (A, B) presenta una serie de pliegues longitudinales, comprendiendo6. - A bag (1) according to the preceding claim, characterized in that each sheet (A, B) has a series of longitudinal folds, comprising
- dos pliegues principales (10) que se extienden al menos a lo largo de una porción de la formación tubular (22), en torno a los cuales cada hoja (A o B) está plegada en dirección a la hoja enfrentada (B o A), que delimitan entre los dos una correspondiente cara mayor (4, 5); - two main folds (10) that extend at least along a portion of the tubular formation (22), around which each sheet (A or B) is folded in the direction of the facing sheet (B or A ), which delimit between the two a corresponding major face (4, 5);
- dos pliegues extremos (1 1) que se extienden a lo largo de la formación tubular (22), próximos a sendos cantos de la hoja, que determinan cada uno con la orilla de la hoja asociada la franja longitudinal (8a) de material de una mitad de cara menor que unida a la franja longitudinal (8b) de su mitad complementaria forma un ribete (8) de refuerzo.  - two extreme folds (1 1) that extend along the tubular formation (22), next to two edges of the sheet, which each determine the longitudinal strip (8a) of material with the edge of the sheet associated a half face smaller than attached to the longitudinal strip (8b) of its complementary half forms a reinforcement rim (8).
7. - Una bolsa (1) según una cualquiera de las reivindicaciones anteriores, caracterizada porque los ribetes de refuerzo (8) se extienden hacia el exterior de la formación tubular (22). 7. - A bag (1) according to any one of the preceding claims, characterized in that the reinforcing edges (8) extend outwards from the tubular formation (22).
8. - Una bolsa (1) según una cualquiera de las reivindicaciones 1 a 6, caracterizada porque los ribetes de refuerzo (8) se extienden hacia el interior de la formación tubular (22). 8. - A bag (1) according to any one of claims 1 to 6, characterized in that the reinforcing edges (8) extend into the tubular formation (22).
9. - Una bolsa (1) según una cualquiera de las reivindicaciones anteriores, caracterizada porque las caras menores (6, 7) están hundidas hacia el interior de la formación tubular a lo largo de toda la longitud de la formación tubular (22), incluyéndose sus extremos (22a, 22b). 9. - A bag (1) according to any one of the preceding claims, characterized in that the smaller faces (6, 7) are sunk into the tubular formation along the entire length of the tubular formation (22), including its ends (22a, 22b).
10. - Una bolsa (1) según una cualquiera de las reivindicaciones anteriores, caracterizada porque la anchura de los ribetes de refuerzo (8) no es constante a lo largo de la formación tubular. 10. - A bag (1) according to any one of the preceding claims, characterized in that the width of the reinforcement piping (8) is not constant along the tubular formation.
1 1. - Una bolsa (1) según una cualquiera de las reivindicaciones anteriores, caracterizada porque la anchura de las caras menores (6, 7) en aquella porción de la formación tubular (22) a lo largo de la cual están hundidas hacia el interior no es constante a lo largo de dicha formación tubular (22). 1 1. - A bag (1) according to any one of the preceding claims, characterized in that the width of the smaller faces (6, 7) in that portion of the tubular formation (22) along which they are sunk towards the inside is not constant along said tubular formation (22).
12. - Una bolsa (1) según una cualquiera de las reivindicaciones anteriores, caracterizada porque el material en lámina a partir del cual se obtiene la formación tubular (22) presenta o se dota de al menos una ventana o abertura (12). 12. - A bag (1) according to any one of the preceding claims, characterized in that the sheet material from which the tubular formation (22) is obtained has or is provided with at least one window or opening (12).
13. - Una bolsa (1) según la reivindicación anterior, caracterizada porque dicha al menos una ventana o abertura (12) está ubicada en una cara mayor (4, 5) de la formación tubular (22). 13. - A bag (1) according to the preceding claim, characterized in that said at least one window or opening (12) is located on a larger face (4, 5) of the tubular formation (22).
14. - Una bolsa (1) según una cualquiera de las reivindicaciones anteriores, caracterizada porque la formación tubular (22) está al menos parcialmente revestida, por dentro o por fuera, con un material de malla (15). 14. - A bag (1) according to any one of the preceding claims, characterized in that the tubular formation (22) is at least partially coated, inside or out, with a mesh material (15).
15. - Una bolsa (1) según la reivindicación anterior, caracterizada porque el material de malla (15) tiene la forma de malla tubular (16), de forma que ajusta por dentro o por fuera de la citada formación tubular (22) de material en lámina. 15. - A bag (1) according to the preceding claim, characterized in that the mesh material (15) has the form of tubular mesh (16), so that it fits inside or outside said tubular formation (22) of sheet material.
16. - Una bolsa (1) según las reivindicaciones 12 y 13, caracterizada porque la formación tubular (22) está únicamente revestida por la parte coincidente con la ventana o abertura (12), de forma que el material de malla (15) cubre o cierra la abertura. 16. - A bag (1) according to claims 12 and 13, characterized in that the tubular formation (22) is only covered by the part coinciding with the window or opening (12), so that the mesh material (15) covers or close the opening.
17. - Una bolsa (1) según una cualquiera de las reivindicaciones anteriores, caracterizada porque la formación tubular (22) está cerrada por sus extremos (22a, 22b) mediante la yuxtaposición y unión de sus caras mayores (4, 5), con interposición de las caras menores (6, 7) plegadas sobre sí mismas entre dichas caras mayores (4, 5) en uno o en ambos de sus extremos. 17. - A bag (1) according to any one of the preceding claims, characterized in that the tubular formation (22) is closed at its ends (22a, 22b) by juxtaposing and joining its major faces (4, 5), with interposition of the smaller faces (6, 7) folded on themselves between said larger faces (4, 5) at one or both of its ends.
18. - Un procedimiento para la fabricación de una bolsa (1) apta para el envasado de productos hortofrutícolas, comprendiendo el procedimiento las operaciones de 18. - A procedure for the manufacture of a bag (1) suitable for the packaging of fruit and vegetable products, the procedure comprising operations of
a) obtener una formación tubular (22) de un material en lámina a) obtain a tubular formation (22) of a sheet material
- con al menos dos ribetes de refuerzo (8), que se extienden a lo largo de la formación tubular, formados por la yuxtaposición y unión de sendas franjas longitudinales (8a, 8b) del material que conforma la citada formación tubular, y - with at least two reinforcement edges (8), which extend along the tubular formation, formed by the juxtaposition and joining of longitudinal strips (8a, 8b) of the material that forms the said tubular formation, and
- con dobleces que se extienden longitudinalmente a lo largo de al menos una porción de la formación tubular determinando en ella dos caras mayores (4, 5) enfrentadas y dos caras menores (6, 7) hundidas hacia el interior de la formación tubular de enlace entre las caras mayores y en coincidencia con los ribetes de refuerzo, de forma que al menos un ribete de refuerzo queda dispuesto en el fondo de cada cara menor (6, 7) hundida determinando una suerte de apéndice longitudinal; y - with folds that extend longitudinally along at least a portion of the tubular formation determining in it two major faces (4, 5) facing each other and two smaller faces (6, 7) sunk into the tubular link formation between the major faces and in coincidence with the reinforcement edges, so that at least one reinforcement edge is disposed at the bottom of each minor face (6, 7) sunk determining a kind of longitudinal appendix; Y
b) confinar una cantidad de un producto (20) en el interior de la formación tubular (22) mediante la realización de al menos una primera y una segunda costuras transversales (18, 19) de cierre en la formación tubular (2) practicadas al menos una a cada lado del volumen de producto (20). b) confine an amount of a product (20) inside the tubular formation (22) by performing at least a first and a second transverse seams (18, 19) of closure in the tubular formation (2) practiced at minus one on each side of the product volume (20).
19. - Un procedimiento según la reivindicación anterior, caracterizado porque el material en lámina que constituye la formación tubular tiene o se dota de al menos una abertura (12) y porque en el interior de la formación tubular (22) está longitudinalmente introducida, extendiéndose entre la primera y la segunda costuras transversales (18, 19), una malla tubular (16) en cuyo interior queda confinado el producto (20). 19. - A method according to the preceding claim, characterized in that the sheet material constituting the tubular formation has or is provided with at least one opening (12) and because inside the tubular formation (22) it is longitudinally inserted, extending Between the first and second transverse seams (18, 19), a tubular mesh (16) in which the product (20) is confined.
20. - Un procedimiento según una cualquiera de las reivindicaciones 18 y 19, caracterizado porque los ribetes de refuerzo (8) se forman en el material en lámina que constituye la formación tubular (22) con carácter previo a realizar las dobleces longitudinales que determinan las caras menores (6, 7) hundidas hacia el interior de la citada formación tubular (22). 20. - A method according to any one of claims 18 and 19, characterized in that the reinforcing edges (8) are formed in the sheet material constituting the tubular formation (22) prior to making the longitudinal bends that determine the minor faces (6, 7) sunk into the said tubular formation (22).
PCT/ES2016/070743 2016-10-20 2016-10-20 A bag that is suitable for packaging fruit and vegetable products, method WO2018073462A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4265537A1 (en) * 2022-04-21 2023-10-25 Ulrich Etiketten Gesellschaft m.b.H. Paper tubular bag and method of making the same

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GB1259473A (en) * 1968-12-19 1972-01-05
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US20030232161A1 (en) * 2002-06-14 2003-12-18 Paul Lin Poly-woven laminated paper bag with window
WO2008040826A1 (en) 2006-10-02 2008-04-10 Cristóbal Meseguer, S.A. Continuous band for producing bags for fruit and vegetable products

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FR1589469A (en) * 1968-09-10 1970-03-31
GB1259473A (en) * 1968-12-19 1972-01-05
US6033114A (en) * 1998-01-20 2000-03-07 Bagcraft Packaging, L.L.C. Window bag with polyester lining and method of forming same
US20030232161A1 (en) * 2002-06-14 2003-12-18 Paul Lin Poly-woven laminated paper bag with window
WO2008040826A1 (en) 2006-10-02 2008-04-10 Cristóbal Meseguer, S.A. Continuous band for producing bags for fruit and vegetable products

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EP4265537A1 (en) * 2022-04-21 2023-10-25 Ulrich Etiketten Gesellschaft m.b.H. Paper tubular bag and method of making the same

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