MX2007014245A

MX2007014245A - Film bag and method for producing it.

Info

Publication number: MX2007014245A
Application number: MX2007014245A
Authority: MX
Inventors: Jochen Brauer; Marcus Kujat; Detlef Stoppelmann; Darius Maseiker
Original assignee: Nordenia D Halle Gmbh
Priority date: 2005-05-18
Filing date: 2006-05-17
Publication date: 2008-03-24
Also published as: AU2006249119A1; EP1881929A1; DE502006006853D1; JP2008540278A; AU2006249119B2; NZ563372A; DE102005022743B4; WO2006122761A1; EP1881929B1; US20090136160A1; ZA200710315B; ATE465952T1; JP5161765B2; BRPI0610820A2; CA2608005A1; DE102005022743A1; ES2340710T3; CA2608005C

Abstract

The invention relates to a film bag with two front faces (1, 1a??), 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, 4a??) 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 (V) of the bag contains a punched-out area (8) for the slide 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

MOVIE BAG AND METHOD TO PRODUCE IT DESCRIPTION The invention relates to a film bag, with: two front faces, lateral folds inserted between the front faces in a V-shaped manner, and a resealable closure in an upper opening of the bag comprising two profiled strips and a slider that joins the profiled strips, where one of the profiled strips is connected to one front face and the other profiled strip, after the filling of the bag, can be connected to the other front face, where the film layers of the pouch rest on the other they are connected to transverse and longitudinal sealed seams at the bottom and along the edges of the lateral folds and where the longitudinal sealed seams that run along the lateral folds extend from the bottom to the upper edge of the bag. The film bag that lies flat at the beginning is filled with the filling material in the filling facilities of the bag. The filling takes place in the upper part of the bag. The material of The filler is introduced into an opening that is still present between the resealable closure and a front face of the film bag. Subsequently, this opening is sealed by a sealed seam. The film bags with the depictions described are used, among other things, for the packaging of animal feed.

A film bag with the depictions described is known from DE 202 07 333 Ul. The slide of the resealable closure overlaps the edges of the saddle-shaped closure and projects on the upper side of the bag. The profile strips are connected to each other at their end facing the slide and form a seal of originality that can be opened with the first use of the film bag. The disadvantage is that, from the outside, it is not clear if the seal of originality is still undamaged. In addition, there is a danger that the projected slide will get stuck in obstacles during transport of the bag and during handling in the trade, and that it will move without checking. The production of the film bag is also complicated. After making the bag, resealable closures are applied in a downstream installation. For this purpose, a section of the film from the manufactured film bag is opened in the upper section of the bag, a resealable closure is placed on the sheet of film that rests underneath and connects with it. Subsequently, the open section of the film is folded back and the sealed seams still missing are applied. For the application of the resealable closures, the existing equipment for the manufacture of the film bags has to be enlarged by means of an additional installation to apply the resealable closures. The additional installation to apply resealable closures is complicated and requires considerable space. In this regard, there is also a need to integrate the application of resealable closures into the usual bag manufacturing method.

Against this background, the aim of the invention is to provide a film bag having a sliding closure that is trimmed covered and that is simple to manufacture. In addition, a method is provided in which the resealable closure application is made during the continuous forward run of a flat film network prior to the manufacture of the bag.

From a film bag with the representations described above, the objective of the invention is solved in that the resealable closure that includes its slider is arranged at a distance from the upper edge of the bag inside the bag and in which at least one front face of the bag contains a perforated area for the slide which conforms to the dimension of the slide, in which The slide is positioned before the bag is used for the first time. According to the invention, the resealable closure that is arranged in the upper opening of the film bag is covered where the slide remains visible through the sliding surface. For the consumer it is immediately recognizable from the outside that the bag is provided with a sliding closure and that the sliding closure is properly closed. In addition, the perforation of the sliding surface plays an important role in the manufacture of the film bag. The perforation of the sliding surface that fits the dimension of the slide and encloses it, allows an application of the resealable closure on a flat film network before the latter runs through the folding stations in which the network of film is bent and the lateral folds are formed. The perforation of the sliding surface is located exactly in the position of the slide and prevents a movement of the resealable closure during the run of the network on guide trays of the bending stations against the direction of movement of the movie.

The front sides of the film bag have a strip-shaped section covering the resealable closure at the upper end of the bag that can be closed according to a preferred embodiment of the invention along a roughly arranged perforation line. at the level of the slide or below the slide. The perforation lines that extend through the longitudinal sealed seams to the outer edges of the bag are appropriately joined at the ends of the perforation line. The strip can be completely removed as a waste strip from the film bag, in a very simple manner, in the depiction described when using a film bag for the first time. To facilitate the separation of the strip, it is advantageous to have the lateral end folded below the perforation line.

The waste strip, which can be closed along the perforation line, can also fulfill the function of an originality seal when the double-layer strip is sealed at its upper edge with a transverse sealed seam after filling the film bag. With the first use of the film bag, the The top side strip must be separated, where the resealable closure is exposed at the top edge of the film bag. If the sealed cross seam of the strip is not damaged, then it is ensured that the film bag has not been opened.

Within the context of the invention is that, before filling the bag, the profiled strip is connected only to the front face through its entire length and extends in the region of the lateral folds. In this modality the bag can be opened completely on its upper side, to be filled. An alternative representation provides that the profiled strip connected to the front face is placed on the side folds and connected to them prior to filling the bag. In this representation, the filling opening of the bag is somewhat smaller.

The subject matter of the invention is also a method for manufacturing the described film bag. The method according to the invention comprises the following steps of the method: a) the perforations of the sliding zone are applied to a flat sheet network; b) resealable closures consisting of two profiled strips that rest on each other and connect to each other, as well as a slide that overlaps the sealed edges of the profiled strips in the form of a frame, are placed in the flat film network transversely to the direction of the network such that the slide rests within the perforations of the sliding surface, and is attached to the film network at the ends; c) subsequently the film network is guided through the bending stations in which the film network is bent and the lateral folds are formed; d) the film layers of the film web resting on one another are connected by sealed seams, where the bottom of the bags is formed with the transverse sealed seams transversely to the direction of the network and the resealable closures are connected to a front face of the bags and where, along with the lateral folds, the longitudinal sealed seams are applied in the longitudinal direction of the net extending from the bottom to the upper edge of the bag; e) the bags are separated from the run of the bags formed in step d) of the method.

The invention is based on the consideration of the application of resealable closures in the flat film network before the film network runs through the folding stations in which it is folded and where the lateral folds are formed. The application of the resealable closures according to the invention can be integrated into the current bag making systems. The method according to the invention makes use of drilling means and bending devices already present. Thus, the technical problem must be solved, however, that is that the resealable closures can move during transport of the film network through the system, in particular, in the folding apparatus, since the resealable closures are first only connected with the movie network at its ends. An opening must remain between the profiled strips of resealable closures and the film web, so that the bag can be filled at the upper end. Only after the bag is full is this opening closed by sealing the profiled strips towards the front face of the film bag. The described technical problem is solved according to the invention, through step b) of the method.

According to the invention, perforations are introduced in the sliding zone that fall exactly in the position of the slide and prevent movement of the resealable closures and of the slide against the direction of the film run during the run of the slide. network through the production system of the bag, in particular, also during the run of the res on the guide trays of the bending stations. The slides are fixed to a certain degree in the perforations of the associated sliding zone. The perforations of the sliding zone are round perforations in the simplest case, whose diameter adapts to the geometry of the slide.

According to a preferred embodiment of the invention, in the regions of the flat film network from which the lateral folds are formed, apertures in the form of windows are perforated defining the upper end of the side folds of the bag. Advantageously, the perforation lines are further perforated in the flat film network transversely to the longitudinal direction of the net which is arranged at the level of the window-shaped openings and in the run of the bag respectively define a section in the form of a strip which is projected onto the slip zone of the resealable seals to the sealed seam of the bottom of the adjacent bag. The strip can be used as a stamp of originality. Before the first use of a bag, the strip is detached, thereby exposing the slide of the resealable closure. The window-shaped openings as well as the perforation lines are introduced into the flat film network before it runs through the bending stations in which it is bent and the lateral bends are formed. In this connection, there is the technical problem that the film network can tear in the bending system in the perforation lines and in the window-like openings it can tear when the forming tools engage in the perforation or in the perforations and The film network is caught in the tools. This problem can be solved in a surprisingly simple manner, in that the perforation lines extend substantially over the width of the network, however, with the proviso that, between the perforation and the window-shaped openings, respectively, an non-perforated film area 5 to 50 mm wide. The film web is guided in the bending stations so that the edges of the bending tools do not rest against the non-perforated regions of the film between the perforations and the window-shaped openings. He bent over the film network for a tubular network, it takes place using triangular bending trays. When the window-shaped openings are guided concentrically over the triangular trays, surprisingly they do not trap the trays.

Subsequently, perforation cuts can also be introduced into the longitudinal sealed seams that join in the perforation lines.

In the following, the invention will be explained on the basis of a drawing that illustrates only one representation. The Figures show, schematically: Figure 1, a flattened film bag, Figure 2 shows the film bag of Figure 1 after filling, Figure 3 shows a method for producing the flattened film bag that is illustrated in Figure 1, Figure 4 shows a flat film network with the perforations according to the invention introduced before the film network runs through the bending stations and the sealing stations.

The film bag shown in the Figure 1 has two front faces (1, 1 '), lateral folds (2) that are inserted between the side faces in a V-shape and a resealable closure (3) in an upper opening in the bag. The resealable closure (3) comprises two strips (4, 4 ') profiled and a slide (5) that joins the profiled strips. One of the profiled strips (4) is connected to a front face (1). The other profiled strip (4 ') can be connected to the other front face (1') after filling the bag. The film layers of the bag resting on each other are connected by means of transverse and longitudinal sealed seams at the bottom and along the edges of the lateral fold (2), where the longitudinal sealed seams (6) run at length of the lateral folds (2) extending from the bottom to the upper edge of the bag. The resealable closure (3) including its slide (5) is arranged at a distance from the upper edge (7) of the bag inside the bag. A front face (1 ') of the bag contains a perforation (8) of the sliding area adjusted to the dimension of the slide (5) where the slide (5) is positioned before the bag is used for the first time.

The front faces (1, 1 ') have a section (9) in the form of a strip covering the resealable closure (3) at the upper end of the bag that can be closed at along a line (10) of perforations arranged approximately at the level of the slide (5) or below the slide. The perforation lines are joined at the end of the line (10) of perforations extending through the longitudinal seal seams (6) to the outer edges of the bag. The lateral bends (2) end below the line (10) of perforations. The section (9) in the form of a strip can be separated along the line (10) of perforations and the perforation lines (11) that are joined to the film bag. With this, the resealable closure (3) is exposed.

The film bags shown in Figure 1 are used, for example, for packing animal feed. The filling is done in the upper part of the bag. The filling is introduced into an opening that is still present between the resealable closure (3) and a front face (1 ') of the film bag. Afterwards, this opening is sealed by a sealed seam. In addition, the upper edge of the strip-shaped section (9) is closed in the first use of the film bag which is sealed as a stamp of originality. The sealing is carried out with a transverse sealed seam (12) connecting the film layers. In the filling system of the bag the bottom of the film bag is folded back to a vertical bag of flat background. Figure 2 shows the vertical bag with a flat, full bottom.

The method for producing the flattened film bag illustrated in Figure 1 is shown schematically in Figure 3. In a flat film network (13) the perforations (8) of the sliding zone are introduced. In the film network (13) that is provided with the slide zone perforations (8), the resealable closures (5) consisting of two profiled strips (4, 4 ') which rest on one another and which are connected each other, as well as a slide (5) that overlaps the closing edges of the profiled strips (4, 4 '), in an upright manner, are placed transversely to the direction of the network so that the slide (5) it rests on the perforations (8) of the sliding zone. The profiled strips (4, 4 ') are connected only at the ends to the film web (13). Subsequently, the film network (13) runs through the bending stations in which the film network (13) is bent into a tube and the lateral bends (2) are formed. In the sealing station (15), the layers of film resting on one another are connected by the sealing seams (6, 16, lß1), in which the bottoms of the bags with the seams (16, 16 ') are formed. ) transverse sealed, transversely to the direction of the network and the resealable closures are connected to a front face (1) of the bags and where, along the lateral folds (2), the sealed seams (6) are applied longitudinal, in the longitudinal direction of the network extending from the bottom to the top edge (7) of the bag. In this way, a run (17) of the bag ensures that the end of the upper side is connected together on the bottom side, respectively. The bags are finally separated from the run (17) of the bag.

From Figure 4 it is particularly clear that, in the areas (18) of the flat film network (13) from which the lateral folds (2) are formed, the openings (19) in the shape of window that define the upper end of the side folds of the bag. In addition, perforation lines (10) are perforated which are arranged at the level of the openings (19) in the form of a window and in the run (17) of the bag define a transversal strip and / or the section (9) in strip form, projecting above the slide (5) of the resealable closure (3) to the sealed seam (16) of the bottom of the adjacent bag. From Figure 4 it is inferred that the line (10) of perforations extends over the width of the net, with the proviso that, between the ends of the perforation and the window-shaped openings (19), respectively, an unperforated region (20) remains from 5 mm to 50 mm wide. The region (20) of undrilled film between the perforation and the openings (19) in the form of a window prevents the film network (13) from tearing at the bending station (14). In the longitudinal sealed seams (6), the perforation cuts (6) and / or the perforation lines (11) that connect with the perforation lines (10) are applied.

In the exemplary embodiment shown in Figure 1, the profiled strip (4) connected to the front face (1) is placed on the lateral folds (2) before filling the bag and connected therewith. It is also within the context of the invention that, before filling the bag, the profiled strip (4) is connected only to the front face (1) along its entire length and extends to the area of the folds (2) lateral.

Claims

1. Film bag, with: two front faces, lateral folds that are inserted between the front faces in a V-shaped manner, and a resealable closure in an upper opening of the bag comprising two profiled strips and a slide connecting the strips profiled, where one of the profiled strips is connected to one front face and the other profiled strip, after filling the bag, can be connected to the other front face, where the film layers of the bag resting on one another are connected to sealed transverse and longitudinal seams on the bottom side and along the edges of the lateral folds and where the longitudinal sealed seams running along the lateral folds extend from the bottom to the top edge of the bag, characterized in that the resealable closure that includes its slide is arranged at a distance from the upper edge of the balls inside the bag and in that at least one The front of the bag contains a perforated area for the slide that is adjusted to the dimensions of the slide, where the slide is positioned before the use of the bag for the first time.

2. Film bag according to the claim 1, characterized in that the two front faces have a strip-shaped section at the upper end of the bag covering the resealable closure, which can be closed along a perforation line arranged at the level of the slide or below of the slide.

3. Film bag according to the claim 2, characterized in that the perforation lines extending through the longitudinal sealed seams towards the outer edges of the bag are joined at the ends of the perforation lines. Film bag according to claim 2 or 3, characterized in that the lateral folds end below the perforation line. Film bag according to one of claims 1 to 4, characterized in that the profiled strip connected to the front face before filling the bag is connected along its entire length only to that front face and extends inside the region of the lateral folds. Film bag according to one of claims 1 to 4, characterized in that the profiled strip connected to the front face is placed on the side bends and connected to them before filling the bag. 7. Method to produce film bags according with one of claims 1 to 6, characterized in that it comprises the following steps of the method: a) perforations of the sliding zone are introduced into a flat sheet network; b) resealable closures consisting of two profiled strips that rest on each other and connect to each other, as well as a slide that overlaps with the sealing edges of the profiled strips in the form of a mount, are placed in the direction transverse to the network in such a way that the slide rests within the perforations of the sliding surface, and is attached to the film network at the ends; c) the film network is guided through the bending stations in which the film network is bent and the lateral folds are formed; d) the layers of film resting on one another are connected by sealed seams, where the bottom of the bags is formed with the transverse sealed seams transverse to the direction of the network and the resealable seals are connected with a front face of the bags and where, together with the lateral folds, the longitudinal sealed seams are applied in the longitudinal direction of the net, extending from the bottom to the upper edge of the bag; e) the bags are separated from the run of the bags formed in step d) of the method. 8. Method according to claim 7, characterized in that the window-shaped openings defining the upper end of the folds of the bag are perforated in the regions of the flat film network from which the lateral folds are formed. 9. Method according to claim 8, characterized in that, in the film network transverse to the longitudinal direction of the net, perforation lines are perforated which are arranged at the level of the window-shaped openings and which define in the run of the bag, respectively, a a strip-shaped section projecting over the slide of the resealable closure to the sealed seam of the bottom of the adjacent bag, where the perforation lines extend over the width of the net with the condition that an unperforated region of the web remains film, from 5 mm to 50 mm wide, respectively, between the perforation and the window-shaped openings. 10. Method according to claim 9, characterized in that in the longitudinal sealed seams are inserted perforated cuts that are joined in the line of perforations.