ES2340710T3 - MOVIE BAG AND PROCEDURE FOR MANUFACTURING. - Google Patents

Abstract

The invention relates to a film bag with two front faces (1, 1'), side folds (2) which are inserted between the front faces in a V-shaped manner, and a resealable closure (3) in a top opening in the bag, comprising two profiled strips (4, 4') and a slide (5). The film layers of the bag which rest one on the other are connected to transverse and longitudinal sealed seams at the bottom and along the edges of the side folds (2), with the longitudinal sealed seams (6) which run along the side folds extending from the bottom to the upper edge (7) of the bag. The resealable closure (3), including its slide (5), is arranged at a distance from the upper bag edge (7) inside the bag. At least one front face (1') of the bag contains a punched-out area (8) for the slide (5) which is matched to the dimensions of the slide (5) and in which the slide (5) is positioned before the bag is used for the first time. The invention also relates to a method for producing the described film bag.

Description

Bag of film material and procedure for its manufacture

The invention concerns a bag of material film with a reapplicable closure in an opening on the side of bag head according to the preamble of claim 1.

The bag of film material arranged flat moment is loaded into bag filling equipment with a cargo product. Filling is done by the head of the bag. The loading product is introduced into an opening that is still present between the reapplicable closure and a front side of the bag of film material. Then, this opening is closed by means of a sealing seam. Such material bags film are used, among other applications, for the packaging of I think for animals.

A bag of film material according to the preamble of claim 1 is known from US 6 347 885 B1. The bag of known film material has two front walls formed by folding a film, which they are joined by a folding edge on the bottom side and by sealing seams on the longitudinal sides of the bag. He reapplicable closure is arranged in an opening on the side of the bag head and consists of two profiled strips and a cursor which couples said profiled strips, one of the strips being attached profiled with a front wall and being able to join the other strip profiled, after filling the bag, with the other side frontal. The reapplicable closure, including its cursor, is arranged inside the bag some distance from the top edge of the same, containing the front side of the bag a die cut adapted to the dimensions of the cursor, in which it is positioned said cursor before the first use of the bag. Front sides at the top end of the bag they have a section in the shape of strip that conceals the reapplicable closure and that can be detached from along a perforation line arranged below the cursor. Bag of film material formed without folds side forms a cushion-shaped container.

EP 1 234 773 A describes a similar execution of a film material container with a closure reapplicable arranged on the side of the head.

Document DE 202 07 333 U1 is known as a bag of film material in the form of a fold bag lateral features V-shaped tucked side folds between the front sides and that is also equipped with a closure reapplicable The reapplicable closure is arranged in an opening on the side of the head of the bag and consists of two profiled strips and A cursor that couples these strips. The reapplicable closing cursor It is mounted like a jinetillo on the closing edges of the strips profiled and protrudes from the top side of the bag. Strips profiles are attached to each other at their opposite end to the cursor and form an originality closure that can be torn when used by First time the bag of film material. The fact is disadvantageous that cannot be seen from the outside without major difficulties if the originality closure is still intact. There is also the risk of the protruding cursor getting caught in elements of resistance during the transport of the bag or its manipulation in commerce and then move uncontrollably. The Manufacturing of the film material bag is also complicated. Following the manufacture of the bag the closures are placed reapplicable in a postponed part of the installation. To this end, a section of the film of the film material bag is lifted already manufactured in the area of the head of the bag, a reapplicable closure on the film strip below and unite said closure with it. Then you have to go back to fold the section of raised film and you have to do the sealing seams that are still missing. For the placement of reapplicable closures the facilities have to be expanded existing manufacturing of bags of film material with a additional installation of reapplicable fasteners. The additional installation of reapplicable fasteners installation is complicated and requires considerable space. Therefore, there is also the need to integrate lock fittings reapplicable in the usual bag manufacturing procedure.

Given this background, the invention is based on the problem of indicating a bag of film material in the form of a side fold bag that features a cursor closure arranged in a hidden way and that can be manufactured in a way simple. It is also intended to indicate a procedure in which the reapplicable closures are placed during the continuous advance of a flat film band before the conformation of the bag.

The object of the invention and the solution thereof problem is a bag of film material according to claim 1. The reapplicable closure, including its cursor, is arranged inside from the bag some distance from the top edge of the bag. To the less a front side of the bag contains a die cut adapted to the cursor dimension, in which the cursor is positioned before of the first use of the bag. The reapplicable closure is arranged in hidden position in the head area of the material bag film, the cursor remaining visible through the die cut for the same. Therefore, it can be recognized immediately from outside the consumer that the bag is equipped with a cursor closure and that the cursor closure is correctly closed. In addition, the punch for the cursor performs a function important in the manufacture of bags of film material. He die cut for the cursor, which is adapted to the size of the cursor and hugs it, makes a reapplicable closure placement possible on a flat film band before it goes through folding stations in which the film band is folded and make up side folds. The punch for the cursor is seated exactly at the cursor position and prevents slide the band over guide plates of the stations folded, the reapplicable closure moves in the opposite direction to the film slide direction.

The front sides of the film material bag have a strip-shaped section at the upper end of the bag that conceals the reapplicable closure and can be detached along a perforation line arranged approximately at the height of the cursor or by under this one. The ends of the perforation line have die-cut lines that extend through the longitudinal sealing seams to the outer edges of the bag. In the described embodiment, the strip can be removed from the film material bag as a waste strip in a complete and simple manner when a film material bag is used for the first time. In order to facilitate the cutting and separation of the strip it is convenient that the lateral folds end below the line of
perforations

The removable scrap strip along the perforation line can also perform the function of a originality closure when the double layer strip is sealed in its upper edge with a transverse sealing seam after filling of the bag of film material. During the first use of the bag of film material has to be cut and separate the strip from the upper side, releasing the reapplicable closure at the top edge of the bag of film material. If the Transverse sealing seam of the disposable strip is intact, it is ensured then that the bag has not been previously opened of film material.

It is within the framework of the invention that the profiled strip attached to the front side before filling the bag is attached along its entire length only with the front side and extend to the area of the lateral folds. Is this realization the bag can be fully opened on its upper side for the filling operation. An alternative embodiment provides that the profiled strip attached to the front side before a filling of the bag is placed on the side folds and joined with these. In this embodiment the filling opening is something else little.

It is also the object of the invention a method according to claim 5 for manufacturing the bag of film material described.

The invention is based on the consideration of place the reapplicable closures on the flat film strip before said film band travels folding stations in which it is folded and lateral folds are formed. The placement of the reapplicable closures according to the invention can integrate into existing bag manufacturing facilities. He procedure according to the invention makes use of the equipment of punching and folding equipment already existing in a facility of bag manufacturing. However, the technical problem that reapplicable closures can move during the transport of the film band through the installation, especially in refolding equipment, since reapplicable closures are joined at the moment only at the ends With the movie band. Between the profiled strips of the closures reapplicable and the film band has to remain an opening so that the bags can be filled by the end of the side of the head. Only after filling the bag is this weld opening of the profiled strip with the front side of the bag of film material. The technical problem described is resolves according to the invention by means of step b) of the process. According to the invention, some films are practiced in the film strip die cut for cursor that are located exactly on the position of the cursors and that, when the band slides through the bag manufacturing facility, especially also at sliding the band over the station guide plates of folded, prevent displacement of reapplicable closures and the cursors in the opposite direction to the sliding direction of the movie. The cursors are, so to speak, immobilized in the associated die cuts provided for them. The die cut for the cursors consist of the simplest case in round holes whose diameter is adapted to the geometry of the cursors.

Also, in areas of the flat film band with which the lateral folds are formed, some are punched window-shaped recesses that limit the upper end of the side folds of the bag. Also, in the movie band flat are punched transversely to the longitudinal direction of said band some perforation lines that are arranged to the height of the window-shaped recesses and that limit in the string of bags a respective stretch of strip shape that protrudes from the reapplicable closing cursor to the sealing seam of the bottom of the adjacent bag. The strip can be used as closure of originality. Before the first use of a bag, the pulls, releasing the cursor of the reapplicable closure. The recesses window-shaped, like perforation lines, are practiced in the flat film band before it touches folding stations where it is folded and conformed lateral folds. There is the technical problem here that the band of film, at the folding stations, I was able to tear through the perforation lines and window-shaped die cuts when the shaping tools fit in the perforations or the die cut and the film band is hooked on the tools. This problem can be solved in a surprisingly simple way. causing, certainly, the perforation lines to extend substantially across the entire width of the band, but with the condition that between the perforations and the recesses of form The window always has a 5 mm non-perforated film area 50 mm wide The movie band is conducted in the folding stations so that the edges of the tools of bending applied to areas of unperforated film between the perforations and recesses. The retracted band of film to obtain a tubular band is made using triangular folding plates. When the Window-shaped die cuts extend in a centered position to along the triangular shaped plates, these, so Surprisingly, they don't get caught in the sheets.

For longitudinal sealing seams, they still practice die cuts that join the perforation lines

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In the following, the invention is explained referring to a drawing that represents only one example of realization. They show schematically:

Figure 1, a bag of film material flattened

Figure 2, the bag of film material represented in figure 1 after filling,

Figure 3, a procedure for manufacturing the bag of flattened film material depicted in figure 1 Y

Figure 4, a flat film band with stamped according to the invention before said band of film travels folding stations and stations sealed.

The bag of film material represented in Figure 1 has two front sides 1, 1 ', side folds 2 V-shaped tufts between the front sides and a closure reapplicable 3 in an opening on the side of the bag's head. He reapplicable closure 3 consists of two profiled strips 4, 4 'and a cursor 5 that couples said profiled strips. One of the strips profiled 4 is joined with a front side 1. The other strip 4 'profile can be joined with the other front side 1' after fill the bag The overlay film layers of the bag are joined with transverse and longitudinal sealing seams on the bottom side and along the edges of the folds lateral 2, extending the longitudinal sealing seams 6 that run along the lateral folds 2 from the bottom to the top edge of the bag. The reapplicable closure 3, including your cursor 5, is arranged inside the bag to certain distance from the upper edge 7 thereof. A 1 'front side of the bag contains a die cut 8 adapted to the dimension of cursor 5, in which cursor 5 is positioned before the first use of the bag.

The front sides 1, 1 'present in the upper end of the bag a section 9 of strip form that hides the reapplicable closure 3 and that can be detached along a perforation line 10 arranged approximately at the height of cursor 5 or below this cursor. The ends of the line of perforations 10 have die cut lines 11 joined together extend through the longitudinal sealing seams 6 to the outer edges of the bag. The lateral folds 2 end below the perforation line 10. Section 9 of Strip shape can be cut and separated from the material bag film along the perforation line 10 and the lines of adjacent punching 11. The reapplicable closure is then discovered 3.

The bags of film material represented in figure 1 they are used, for example, to package feed for animals. Filling is done by the head of the bag. He loading product is introduced into an opening that is present still between the reapplicable closure 3 and a 1 'front side of the bag of film material. Then, this opening is closed by means of a sealing seam. In addition, it is sealed as closure of originality the upper edge of the strip-shaped section 9 that detaches when using the bag of film material for the first time. He Sealing is done with a cross-seam 12 seam that joins The layers of film. In the bag filling facility, fold back the bottom of the bag of film material to get a support fund. Figure 2 shows the bag filled with bottom of support.

The procedure to manufacture the bag flattened film material depicted in figure 1 is shown schematically in figure 3. In a flat film band 13 8 die cuts are produced for cursor. About the movie band 13 provided with die cut 8 for cursor are placed above the band flat film 13, transversely to its direction, about reapplicable closures 3 consisting of two profiled strips 4, 4 ' superimposed and joined with each other, as well as a cursor 5 that Ride a jinetillo on the edges of the strips profiled 4, 4 ', such that the cursors 5 are located within the punched 8 provided for them. Strips 4, 4 'profiles are joined only at the ends with the band of movie 13. Next, movie band 13 goes through folding stations in which the film band 13 folds forming a flexible tube and the lateral folds 2 are obtained. sealing stations 15 join the superimposed film layers of the band of film material by means of sealing seams 6, 16, 16 ', forming the bottom of the bags with seams of transverse sealing 16, 16 'perpendicular to the direction of the band and joining the reapplicable closures 3 with a front side 1 of the bags, and disposing along the side folds 2 longitudinal sealing seams 6 in the direction longitudinal of the band, which extend from the bottom to the top edge 7 of the bags. In this way, you get a string 17 of bags that join with each other at the end of the bottom side or head side. Finally, they are cut and separate the bags from the string 17 of bags.

Particularly in figure 4 it is put stated that in zones 18 of movie band 13 with which side folds 2 are formed, cut-outs are cut 19 window-shaped that limit the upper end of the folds side of the bags. In addition, in the flat film band 13, die transversely to the longitudinal direction of said band perforation lines 10 that are arranged to the height of the recesses 19 of window form and that limit in the string 17 of bags a respective cross strip or a respective section 9 of strip form protruding from cursor 5 of the closure reapplicable 3 to seal seam 16 at bottom of bag contiguous It follows from Figure 4 that the line of perforations 10 extends over the entire width of the band of such so that between the ends of the perforations and the recesses 19 window form always remains a film zone 20 not perforated with a width of 5 mm to 50 mm. The movie zones 20 unperforated between perforations and recesses 19 window-shaped prevent the film band 13 from tearing at the folding stations 14. In the sealing seams longitudinal cuts 6 are still cut die cuts or die cut lines 11 that join the lines of perforations 10.

In the embodiment shown in the Figure 1 the profiled strip 4 connected with the front side 1 before fill the bag is placed on the side folds 2 and attached with these. It is also within the framework of the invention that the profiled strip 4 attached to the front side 1 before filling the bag is attached along its entire length only with the front side 1 and extend to the area of the lateral folds 2.

Claims (5)

1. Bag of film material formed only by a single movie band, which comprises two front sides (1, 1 ') and a reapplicable closure (3) in an opening of the side of the bag head, which consists of two strips profiles (4, 4 ') joined together and a cursor (5) that couples the profiled strips (4, 4 '), wherein one of the profiled strips (4) is joined with a front side (1) and the other profiled strip (4 ') can be joined with the other front side (1') after filling the bag, where the closure reapplicable (3), including its cursor (5), is arranged inside the bag at a certain distance from the upper edge (7) of the bag, where at least one front side (1 ') of the bag contains a die cut (8) adapted to the dimensions of the cursor (5), in which the cursor (5) is positioned before the first use of the bag, and where the front sides (1, 1 ') have a section on the upper end of the bag (9) in the form of a strip that conceals the reapplicable closure (3) and can be detached along a perforation line (10) arranged at or below the cursor (5), characterized in that between the sides front (1, 1 ') are tucked in a V-shaped side folds (2), because the layers of superimposed film of the bag are joined with costu Transversal sealing strips (16, 16 ') and longitudinal (6) along the bottom side and along the edges of the lateral folds (2), extending the longitudinal sealing seams (6) that run along the lateral folds (2) from the bottom to the upper edge (7) of the bag, and because the ends of the perforation line (10) have die cut lines (11) that extend through the sealing seams longitudinal (6) to the outer edges of the bag. 2. Bag of film material according to claim 1, characterized in that the lateral folds (2) end below the perforation line (10). 3. Bag of film material according to claim 1 or 2, characterized in that the profiled strip (4) joined with the front side (1) before filling the bag is joined along its entire length only with the front side (1) and is extend to the area of the lateral folds (2). 4. Bag of film material according to claim 1 or 2, characterized in that the profiled strip (4) joined with the front side (1) before filling the bag is placed on the side folds (2) and joined with them. 5. Procedure for manufacturing bags film material according to any of claims 1 to 4 with the following procedural steps:

to)

in a flat film band (13) are punched out (8) to cursors and in areas of the flat film band (13) with the which side folds are formed (2) recesses are punched out (19) window-shaped that limit the upper end of the side folds (2) of the bags;

b)

on the flat film band (13), transversely to the direction of the same, reapplicable closures (3) consisting of two profiled strips (4, 4 ') superimposed and joined together, as well like a cursor (5) that mounts like a jinetillo on closing edges of the profiled strips (4, 4 '), such that the cursors (5) are located in the punched (8) provided for them and they join at the ends with the movie band (13);

C)

in the flat film band (13) are practiced, transversely to the longitudinal direction thereof, perforation lines (10) that are arranged at the height of the recesses (19) of window shape and that limit in the string (17) of bags a respective section (9) of strip form protruding from the cursor (5) from the reapplicable closure (3) to a sealing seam (16 ') of the bottom of an adjacent bag that must still be fixed, the perforation lines extending along the entire width of the band in such a way that between perforations and recesses (19) in the form of a window there is always a film area (20) not perforated with a width of 5 mm to 50 mm;

d)

to then the film band (13) is conducted through folding stations (14) in which said band is folded film (13) and lateral folds (2) are formed;

and)

be join the superimposed film layers of the film band by sealing seam means (6, 16, 16 '), forming the bottom of bags with transverse sealing seams (16, 16 ') perpendicular to the direction of the band and joining the closures reapplicable (3) with a front side (1) of the bags, and disposing along the lateral folds (2), in the longitudinal direction of the band, sealing seams Longitudinal (6) extending from the bottom to the edge upper (7) of the bags;

F)

in the longitudinal sealing seams (6) cuts are made die cut (11) that join the perforation line (10);

g)

be cut and separate bags of the string (17) of bags formed in the step e) of the procedure.