ES2356876B1 - HORTOFRUT�? COLAS PRODUCT BAG. - Google Patents

Abstract

Bag for fruit and vegetable products. # The bag of the invention is of the type constituted by a continuous band that closes on itself by means of a longitudinal welding line, defining a fragmented tubular body in modules corresponding to respective bags, in which Said continuous band involves longitudinal strips of closed plastic, alternated with longitudinal strips of mesh, which are superimposed by their marginal areas for joining between them. The invention focuses on the fact that while the closed plastic strips are made of polyethylene, the mesh strips are made of bioriented polypropylene, incorporating the continuous band in correspondence with each overlapping line between the aforementioned strips, a narrow strip also made of polyethylene. , adapted to the polypropylene mesh, which welds with the aforementioned longitudinal and wider strips of polyethylene through the holes of the mesh, fixing the latter. In this way, a smaller quantity of raw material is required for the construction of the bag.

Description

With low density polyethylene and closed sheet

Bag for fruit and vegetable products.

Object of the invention

The present invention refers to a bag of those used for the packaging and marketing of fruit and vegetable products, such as citrus fruits, potatoes, etc., although said bag is usable in any other field where similar benefits are required.

The object of the invention is to obtain a bag that, offering the adequate performance from the point of view of mechanical resistance, requires for its construction a smaller quantity of raw material, with the consequent and bene fi cial impact that this has from the point of view economic. Background of the invention

Certain types of fruit and vegetable products, such as potatoes, have long been commercialized in plastic bags of reticular structure, which allow both aeration and direct visualization of the product. Sometimes and to obtain these bags, it starts from a tubular mesh body that closes at both ends after the product is housed inside, and one of these handles ends can be provided that facilitate manual transport after acquisition by the consumer.

On other occasions, it starts from a continuous, laminar band, which closes on itself to configure the said tubular body, through a longitudinal welding line, after which the aforementioned process is repeated.

The problem common to all these types of bag, focuses on the fact that this mesh body is unable to receive printed information, which is essential in the vast majority of cases, since on the bag itself it is necessary to establish the product brand, product characteristics, barcode, etc.

A solution to this problem is that shown by Utility Model U 9701734, which the applicant himself owns, consists of using a continuous band, structured based on a strip or intermediate longitudinal strip of continuous plastic, of considerable width, susceptible of carrying printed information, two lateral strips with respect to the aforementioned intermediate band, also of plastic, but of reticular structure, specifically based on a three-wire network, these strips being fixed to the intermediate by means of linear and longitudinal welding in correspondence with their overlapping edges, complementing the band with two other fringes or strips of continuous marginal and narrower plastic, also intended to partially overlap their free edge and be fixed together by means of a longitudinal weld, to define the tubular body, subsequently fragmented into sectors or bags that close at their ends after receiving inside the do sis of planned product.

As can be deduced from the above, the indispensable requirement for obtaining a bag such as that of Utility Model U 9701734, is that the plastic material constituting the different strips

or longitudinal strips participating in the band, ie continuous strips and reticular strips, are of compatible materials to be bonded by heat welding.

with medium density polyethylene.

For the mesh to have adequate strength and by its very nature of PE (polyethylene) it must have a minimum weight that can be set in the order of 70 gr / m2.

This brings with it that the bag in question, perfectly valid from the theoretical point of view because it meets the basic requirements demanded of it, in practice it cannot be used for certain products, such as for citrus fruits, as it is not competitive in the market compared to conventional solutions, precisely because of the amount of material required to manufacture it.

The apparently obvious solution to this problem is to use meshes based on materials that, with a high degree of resistance, can be very light, so that the amount of material involved in the bags is minimal, as is the case with bi-polypropylene. -oriented.

However, this apparent solution is not feasible in practice because the bioriented polypropylene is not weldable with polyethylene, at least with the level of mechanical resistance that is required, so that the fixation between longitudinal strips provided in this Model of Utility U 9701734, it is not feasible using these materials.

It is also not feasible to also replace the polyethylene sheets that participate in said Utility Model with bi-oriented polypropylene sheets, that is sheets of the same material as the constituent of the meshes, since the bioriented polypropylene does not weld with itself, at least in an effective way. Description of the invention

The bag for fruit and vegetable products that the invention proposes solves the aforementioned problem definitively, allowing that, from a basic structuring like the one shown in Utility Model U 9701734, medium density polyethylene can be used to obtain the closed bands that they participate in it, and bi-oriented polypropylene to obtain the mesh stripes, leaving one and the other strips solidly joined together.

For this purpose and more specifically, the invention consists in incorporating into the continuous band constitutive of the base element for forming the bags, that is to say the continuous band in which the strips or bands of medium density polyethylene and bi polypropylene bands participate. -oriented, narrow strips of polyethylene that overlap the bi-oriented polypropylene strips in correspondence with the areas where said bi-oriented polypropylene strips in turn overlap the medium density polyethylene strips, obtaining a species sandwich based on two layers of polyethylene that weld directly to each other with interposition of the polypropylene mesh. Description of the drawings

To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical implementation thereof, a set of drawings is attached as an integral part of said description. with personality

3 EN 2356876A1 4

Illustrative and not limiting, the following has been represented:

Figure 1.- Shows, according to a partial perspective view, the continuous band from which it is used to obtain the bag of fruit and vegetable products that constitutes the object of the present invention.

Figure 2.- Shows a section detail of the same band.

Figure 3. Shows a rear elevational view of the bag formed at the expense of the band of Figure 1.

Figure 4 - Shows a cross-sectional detail of the bag in Figure 3.

Figure 5.- It shows, finally, a representation similar to Figure 1 but corresponding to a variant embodiment of the continuous band. Preferred Embodiment of the Invention

In view of the fi gures outlined, it can be seen how the bag that is recommended is obtained from a continuous band (1), in which an intermediate longitudinal strip (2) of medium density polyethylene is established, capable of supporting any type of printed information (3) overlapping the marginal areas of the aforementioned strip (2) two stripes (4-4 ') that as before will be bi-oriented polypropylene and are structured in the form of mesh, strips (4-4' ) that through their opposite marginal zone they overlap in turn to the marginal zone of other strips (5-5 ') of the same polyethylene as the intermediate strip (2) and of width approximately half that of the latter.

On the marginal areas of these strips (2, 4 and 5) that are superimposed, narrow strips (6) also of medium density polyethylene are superimposed, strips (6) that are specifically superimposed on the strips (4-4 ') of bioriented polypropylene mesh, so that when applied to the continuous band (1) pressure and heat in these overlapping zones, the strips (2 and 5) are solidly joined by welding to the narrow strips (6) through of the empty spaces of the meshes (4-4 '), as observed especially in Figure 2, so that the different components of the continuous band (1) are solidly joined together.

Obviously the invention is applicable in the same way to a continuous band (1), as shown in Figure 5, which instead of presenting on both sides of the intermediate longitudinal strip (2) of polyethylene, a symmetrical structuring as in the In the case of Figure 1, it has an asymmetrical structuring, so that both sides of it are located two-oriented strips of bi-oriented polypropylene, and only on one side of one of these lattice strips (4) another longitudinal strip (7) of material and size coinciding with those of the central strip (2).

From here and as is conventional, the continuous band (1) closes on itself transforming itself into a tubular body, in which the marginal, longitudinal and free zones of the strips (5-5 ') or (4'- 7) overlap and are fixed by welding, with the help of the narrow strips (6) mentioned, tubular and continuous body which, as is also conventional, is fragmented into portions such as that shown in Figure 3, corresponding to respective units or bags that will conveniently close at their ends.

5 EN 2356876A1 6

Claims (3)

1. Bag for fruit and vegetable products, of the type that are constituted by a continuous band that closes on itself by means of a longitudinal welding line, constituting a fragmentary tubular body in modules corresponding to respective bags, and of which in said band Continuous longitudinal strips of closed plastic participate, alternated with longitudinal strips of mesh, which are superimposed by their marginal areas for union between them, characterized in that while the closed plastic strips are made of polyethylene, the mesh strips are made of bi-oriented polypropylene, incorporating the continuous band in correspondence with each overlapping line between the aforementioned strips, a narrow strip also made of polyethylene, adapted to the polypropylene mesh, which welds with the aforementioned longitudinal and wider polyethylene strips through the holes in the mesh , fixing the latter. 2. Bag for fruit and vegetable products, according to claim 1, characterized in that when the continuous band has marginal strips of different nature, ie a bi-oriented polypropylene strip and another polyethylene strip, these are joined in the transformation of the continuous band into a tubular body by another narrow strip of polieliteno.  ES 2 356 876 A1    ES 2 356 876 A1    ES 2 356 876 A1   SPANISH PATENTS AND BRANDS OFFICE Application no .: 200930287 SPAIN Date of submission of the application: 09.06.2009

REPORT ON THE STATE OF THE TECHNIQUE

Priority Date:    

51 Int. Cl.:

B65D 06/30 (2006.01)

 RELEVANT DOCUMENTS  

Category

56 Documents cited Claims Affected

Y

ES 2239920 A1 (SEINEC S.A.) 01.10.2005, column 1, line 3 - column 2, line 67; figures 1,2. 1.2

Y

US 3970503 A (RUBY NET HOSOKI KK) 20.07.1976, column 3, line 53-column 6, line 18; Figures 1-7. 1.2

TO

ES 2284340 A1 (PREFORMADOS TUBULARES S.L.) 01.11.2007, column 4, lines 2-7; column 4, line 38-column 8, line 7; figures. 1.2

TO

ES 2214142 A1 (CRISTOBAL MESEGUER S.A.) 01.09.2004, column 3, line 26-column 4, line 37; Figure 1. 1.2

TO

JP 7033170 A (TOPPAN PRINTING CO LTD) 03.02.1995, Summary of the EPODOC database. Recovered from EPOQUE; AN JP-17545993-A. 1.2

TO

JP 2004196353 A (YAMAGATA GRAVURE CO LTD; UC HANBAI KK) 15.07.2004, figure 4 & Summary of the EPODOC database. Recovered from WPI; AN 2004-513077. 1.2

Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

This report has been prepared • for all claims • for claims no:

Date of realization of the report 12.02.2010

Examiner F. J. Riesco Ruiz Page 1/4

Application number: 200930287 REPORT ON THE STATE OF THE TECHNIQUE Minimum documentation sought (classification system followed by classification symbols) B65D Electronic databases consulted during the search (name of the database and, if possible, search terms used) INVENTIONS, EPODOC, WPI State of the Art Report (additional sheet) Page 2/4  WRITTEN OPINION Application number: 200930287 Date of Written Opinion: 12.02.2010

Statement

Novelty (Art. 6.1 LP 11/1986)

Claims 1,2 Claims _____________________________________ Yes NO

Inventive activity

Claims _____________________________________ Yes

(Art. 8.1 LP11 / 1986)

Claims 1,2 NO

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).  Opinion Base.- This opinion has been made on the basis of the patent application as published. Report on the State of the Art (Written Opinion) Page 3/4  WRITTEN OPINION Application number: 200930287 1. Documents considered.- The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Document

Publication or Identification Number publication date

D01

ES 2239920 A1 (SEINEC S.A.) 01.10.2005

D02

US 3970503 A (RUBY NET HOSOKI KK) 07/20/1976

2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement The object of the invention is a bag for fruit and vegetable products, which is constituted by a continuous band that closes on itself by a longitudinal welding line, constituting a fragmentary tubular body into modules corresponding to respective bags. In the continuous band longitudinal strips of closed polyethylene plastic participate, alternated with longitudinal strips of bi-oriented polypropylene mesh, which are superimposed by their marginal areas for joining between them. For this connection, a narrow strip of polyethylene, which welds with the aforementioned longitudinal and wider strips of polyethylene through the holes in the mesh, is incorporated into the continuous band, in correspondence with each overlapping line between the aforementioned strips, fixing the latter. The inclusion of this strip of polyethylene allows fixing each other and using in the same bag materials that are not compatible to be joined by heat welding, such as polyethylene and bi-oriented polypropylene. Document D1 is considered the state of the art closest to the technical object of claim 1 of the application. Document D1 discloses a bag for fruit and vegetable products, which is constituted by a continuous band that closes on itself by a longitudinal welding line, constituting a fragmentary tubular body into modules corresponding to respective bags. In the continuous band longitudinal strips of closed polyethylene plastic participate, alternated with longitudinal strips of polypropylene mesh, which overlap by their marginal areas for joining between them. For this connection, a narrow strip of hot glue ("hot melt"), which solidifies the polypropylene mesh to the wide longitudinal strip of polyethylene, is incorporated into the continuous band, in correspondence with each superposition line between the aforementioned strips. (see column 1, line 3 - column 2, line 67; figures 1,2). It is thus possible to fix each other and use materials in the same bag that are not compatible to be welded together, such as polyethylene and polypropylene. The use of bioriented polypropylene in the manufacture of bags of this type, instead of polypropylene, is common knowledge in the state of the art. The difference between D1 and the technical matter of claim 1 is that a polyethylene strip is used as a solder joint, instead of a solid glue strip. The technical problem that therefore underlies the present application can be established as the provision of an alternative to the fixing mechanism between polyethylene web and bi-oriented polypropylene mesh. This problem and its corresponding solution are already included in document D2 which discloses a bag for fruit and vegetable products, composed of a mesh band of a synthetic resin, to which continuous bands of closed polyethylene plastic are attached for use as labels or reinforcements at the entrance. For the mutual fixation of the synthetic resin mesh and the continuous polyethylene band, strips of molten polyethylene are applied, which by pressure and cooling solidify and weld with the continuous polyethylene band, fixing the mesh in position with respect to the continuous polyethylene band (see column 3, lines 53 - column 6, line 18; figures 1-7). For an expert in the field, the alternative use of these polyethylene strips as relative fixing elements of the mesh and the continuous polyethylene web described in the bag of document D1 would be obvious, resulting in the technical object set forth in claim 1 of application. Therefore, said claim 1 lacks inventive activity in relation to what is disclosed in documents D1 and D2 (Art. 8 LP). In relation to dependent claim 2, using this same joining technique for the relative fixation of the marginal strips when they were of different nature, in the transformation of the band into a tubular body, is a simple use of the known technique for a completely analogous situation, which is evident to the person skilled in the art, without involving an inventive activity. Report on the State of the Art (Written Opinion) Page 4/4