EP0439700A1 - Fabrication process for a dustbag closure device - Google Patents

Abstract

A closure device for filter bags serving to collect dust in vacuum cleaning appliances or the like has a base body to be attached to the filter bag, with a multi-layer structure and flat design out of cardboard- or paperboard-type material. The base body has a passage aperture (5a) for the passage of the dust into the filter bag. On the base body, a closure slide (6a) is arranged between two base body layers, projects by means of a handle (10a) laterally beyond the base body, and can be transferred laterally from an open position which leaves the passage aperture (5a) free into a closed position which closes the passage aperture. The base body is folded from a one-piece folding blank along moulded-in intended fold lines (34, 35, 36). The base body layers, resting one upon the other after folding, are bonded together. The closure slide 6a is, at least in part, an integral part of the folding blank and is connected to the remainder of the folding blank via intended tearing points (27, 28), so that the closure slide (6a) can be torn loose laterally after the folding and bonding. <IMAGE>

Description

The invention relates to a method for producing a connecting piece for filter bags or the like used in vacuuming devices for dust absorption. The connecting piece has a base body to be fastened to the filter bag and having a passage opening corresponding to a dust inlet opening of the filter bag, with a multilayer structure and a flat shape made of cardboard or cardboard-like material and a locking slide arranged on the base body between two base body layers and projecting laterally beyond the base body with a handle, which can be moved from an open position leaving the passage opening to the side into a closed position closing the passage opening.

Both in household vacuum cleaners and in larger, commercially used vacuum cleaners, filter bags or the like are used to collect the dust that accumulates. used. In this case, a suction stream is generated by means of a vacuum cleaner blower, or the like, the dust into a suction channel, suction hose. pulls and from there through the dust inlet opening into the filter bag in question. The dust contained in the sucked-in air is held back by the filter bag wall, while the dust-free air flow penetrates the filter bag wall and is then blown out into the environment. If the filter bag is full, it is removed and can be thrown away.

The filter bag is attached to the vacuum cleaner device by means of the connector attached to the filter bag in the region of its inlet opening, in particular by gluing. As mentioned at the beginning, this connecting piece is suitable for attaching a locking slide. With the help of this slide valve, the inlet opening of the filter bag or the through opening of the connector can be closed when the filter bag is removed from the vacuum cleaner device, so that no dust can escape from the filter bag into the environment again.

From US-PS 28 64 462 and the unpublished DE-OS 38 33 799 similar connectors with the features mentioned emerge. These connecting pieces are constructed in three layers, the slide valve being contained in the middle position between two opposite guide parts guiding the slide valve. In the manufacture of such a connector, the two outer layers, the two guide parts and the slide valve are cut out of cardboard or cardboard material, after which they are placed on top of one another and with the exception of the slide valve together be glued.

DE-OS 24 o7 478 also describes a connector of the type mentioned, this connector being formed in two layers with a flexible slide slide band arranged between the two layers. Here, too, the two layers are cut out and glued to one another, the closure slide band being interposed and glued with its one end region, which runs in a folded manner.

This cutting out of the individual components of the connecting piece and their subsequent stacking is cumbersome and time-consuming. The individual components can be punched out very rationally from tape-shaped cardboard or cardboard material. However, they must then be removed and coated with adhesive separately and then placed exactly on top of one another.

The present invention is therefore based on the object of providing a method for producing such a connecting piece, with which the connecting piece can be manufactured in a particularly simple and inexpensive manner.

This object is achieved according to the invention in that the base body is folded from a one-piece folding blank along molded-in predetermined bending lines and the base body layers lying on top of one another after folding are glued to one another and in that the closure slide is at least partially part of the folding blank and is connected to the rest of the folding blank via predetermined tear points, so that the slide gate can be torn off to the side after folding and gluing.

Due to the production of the base body from a folding blank, which also forms the closure slide at least in part, the manufacturing effort is significantly reduced. One can proceed in such a way that the folded blanks cut from a cardboard or cardboard tape remain in the tape running through the production system and are folded and glued in this position by means of suitable devices. All of this can be fully automated. The band-shaped cardboard or cardboard material serves as a means of transport for the folded blanks and the resulting intermediate products and connecting pieces. Furthermore, after folding, the various components lie on one another exactly in the desired position.

At the same time, the locking slide is correctly positioned because it is firmly connected to the base body on the finished connector via the predetermined tear points. The connector can then be attached to the filter bag with the slide valve still stuck. The slide gate only needs to be torn off when you want to remove the filter bag.

The closure slide connected to the base body via the predetermined tear points has the further advantage, in particular in the case of sliders containing a flexible closure slide band, that the closure slide is not inadvertently pulled into its closed position before use of the filter bag, from which it hardly moves back in due to its flexible closure slide band would have the open position pushed back.

Fig. 1

einen mit einem Anschlußstück versehen Filtersack in schematischer Schrägansicht,

Fig. 2

das Anschlußstück des Filtersacks gemäß Fig. 1 in gesonderter Darstellung in Vorderansicht,

Fig. 3

das Anschlußstück gemäß Fig. 2, wobei die Handgriffpartie des Verschlußschiebers vom Grundkörper losgerissen und der Verschlußschieber ein Stück weit in Richtung auf seine Schließstellung hin bewegt ist,

Fig. 4

das gleiche Anschlußstück mit in die Schließstellung gezogenem Verschlußschieber,

Fig. 5

den zur Herstellung des Anschlußstücks gemäß den Fig. 1 - 4 verwendeten Faltzuschnitt,

Fig. 6

den Faltzuschnitt nach Fig. 5 mit eingeklebtem Verschlußschieberband,

Fig. 7

die Anordnung nach Fig. 6 während des Zusammenfaltens zu einem zweilagigen Aufbau in Schrägansicht,

Fig. 8

die Anordnung nach den Fig. 6 und 7 nach dem Zusammenfalten und Verkleben,

Fig. 9

das fertige Anschlußstück im in seiner Langsrichtung verlaufenden Querschnitt gemäß der Schnittlinie IX-IX in Fig. 2,

Fig. 1o

das gleiche Anschlußstück im der Fig. 9 entsprechenden Querschnitt, wobei der Verschlußschieber jedoch in seine Schließstellung herausgezogen ist,

Fig. 11

ein zweites Ausführungsbeispiel des Anschlußstücks in der Fig. 2 entsprechender Ansicht,

Fig. 12

das Anschlußstück gemäß Fig. 11 bei in die Schließstellung gezogenem Verschlußschieber,

Fig. 13

das Anschlußstück gemäß den Fig. 11 und 12 im rechtwinkelig zu seiner Längsrichtung verlaufenden Querschnitt gemäß der Schnittlinie XIII-XIII in Fig. 11

Fig. 14

den zur Herstellung des Anschlußstücks gemäß den Fig. 11 - 13 verwendeten Faltzuschnitt und

Fig. 15

den Faltzuschnitt nach Fig. 14 während des dreilagigen Zusammenfaltens in Schrägansicht.

A connector is known from DE-AS 13 01 025, which is made from a folding blank that forms a closure assigned to the passage opening and held in place by predetermined tear points. However, this is not a slide gate but a door flap hinged like a door, which is pushed open at right angles to the level of the connector when the filter bag is inserted into the vacuum cleaner by tearing open the predetermined tear points. This corresponds to the usual pushing out of an individual part from a layer of material, as is known to practically everyone, for example from paper handicrafts.
In contrast, for parts moving in a slide-like manner, such attachment via predetermined tear points is not common. In addition, the closure slide present in the patented method is not torn off for opening the passage opening but only for later closing the passage opening when the filter bag is removed from the vacuum cleaner.
Appropriate developments of the invention are specified in the subclaims.
Embodiments of the invention will now be explained in detail with reference to the drawing. Show it:

Fig. 1

a filter bag provided with a connector in a schematic oblique view,

Fig. 2

1 in a separate representation in front view,

Fig. 3

2, wherein the handle portion of the slide is torn from the base body and the slide is moved a little towards its closed position,

Fig. 4

the same connector with the slide valve pulled into the closed position,

Fig. 5

the folding blank used to manufacture the connector according to FIGS. 1-4,

Fig. 6

5 with the closure slide tape glued in,

Fig. 7

6 while folding to a two-layer structure in an oblique view,

Fig. 8

the arrangement of FIGS. 6 and 7 after folding and gluing,

Fig. 9

the finished connector in its longitudinal cross-section according to section line IX-IX in Fig. 2,

Fig. 1o

9 shows the same connecting piece in the cross section corresponding to FIG. 9, but the slide is pulled out into its closed position,

Fig. 11

a second embodiment of the connector in Fig. 2 corresponding view,

Fig. 12

11 with the slide valve pulled into the closed position,

Fig. 13

11 and 12 in the cross-section perpendicular to its longitudinal direction according to the section line XIII-XIII in Fig. 11th

Fig. 14

the folding blank used to manufacture the connector according to FIGS. 11-13 and

Fig. 15

14 during the three-layer folding in oblique view.

The filter bag 1 shown in FIG. 1, one could also use a filter bag or the like. speak, is provided on one of its sack walls - sack wall 2 - with an inlet opening 3. In the sack wall area of the inlet opening 3, a connecting piece 4 is fastened to the outside of the sack wall 2, the connecting piece 4 being simply glued onto the sack wall 2 in a regular manner. The vacuuming device for which the filter bag 1 is intended has a suitable holding device for the connector 4, so that the filter bag is held in place on the connector 4 in the vacuuming device. At the connection piece 4 there is a passage opening 5 corresponding to the dust inlet opening 3 of the filter bag wall 2, so that when the connection piece is fastened to the filter bag there is a passage formed by the passage opening 5 of the connection piece and the inlet opening 3 behind it, through which the inside of the bag is accessible.

In use you can use the connector 4 of the filter bag plug its through opening 5 a short distance onto a device-side connector. The air stream containing the dust, which is generated by means of a blower and is supplied via a suction channel or suction hose connected to the device-side connecting piece or other connecting means, inflates the filter bag 1 and passes through the bag wall made of air-permeable material, the dust in the Sack is held back.

If the filter bag is filled, it is removed from the vacuuming device and can be thrown away. This removal of the full filter bag is problematic in that dust can get out into the environment again through the passage formed by the openings 3, 5. In order to remedy this situation, a closure slide 6 is provided on the connecting piece 4, which can be moved from an open position that leaves the passage opening 5 to the side into a closed position that closes the passage opening 5.

The passage opening 5 is located on a base body 7 of the connector 4, which is glued to the filter bag wall 2. The base body 7 consists of cardboard or cardboard-like material and has a flat shape with a multilayer structure. The locking slide 6 is arranged between two base body layers 8, 9 and projects laterally beyond the base body 7 with a handle 10.

When using the filter bag, the closure slide 6 is in its open position, in which it does not hinder the passage of dust into the filter bag.

For this purpose, a passage opening 11 corresponding to the passage opening 5, which is aligned with the passage opening 5 in the open position, can be present on the closure slide 6 when it extends over the main body region of the passage opening 5 in the open position. When it is later transferred into the closed position, which is done manually by means of its handle 10, the closure slide 6 moves in the connector plane running at right angles to the axis line of the holes 3, 5, 11 and thereby pushes with a closed closure part over the passage opening 5 the displacement of the locking slide is guided between the two base body layers 8, 9 in the base body 7.

The previous description also applies in full to the exemplary embodiment according to FIGS. 11-15, in which the same parts are drawn with the same reference numbers with the addition of an "a". In this regard, the connector according to FIGS. 11-15, when it is explained in detail, will not be described any further later.

It is also common to all of the exemplary embodiments that the base body is folded from a one-piece folding blank along molded-in predetermined bending lines and the base body layers lying one on top of the other after the folding are glued to one another and that the closure slide is at least partially part of the folding blank and is connected to the rest of the folding blank via predetermined tear points, so that the slide can be torn away to the side after folding and gluing.

If here and below of predetermined bending lines and predetermined tear points is spoken, it means that the cutting material here is still partially connected in one piece, but that it can be bent or separated from one another by tearing to the side. This can be achieved by means of appropriate incisions or punchings in the folding blank material.

In the case of the connecting piece shown in FIGS. 2 to 10, it is a folding blank 12 which can be folded into a two-layer structure, so that the two layers 8, 9 already mentioned are formed. The folding blank 12 has two blanking areas 14, 15, which are separated from one another by the predetermined bending line 16. The basic body layer 8 results from the cutting region 14 and the basic body layer 9 results from the cutting region 15. The folding blank 12 has an elongated shape with a rectangular shape, the predetermined bending line 16 extending across the folding blank in the central region, so that a with reference to the predetermined bending line 16 results in an essentially symmetrical appearance of the two cutting regions 14, 15. In each of the two cut regions 14, 15 lying one after the other around the predetermined bending line 16, a partial passage opening 5 ′ or 5 ″ is contained, which together result in the passage opening 5.

Each of the two cutting regions 14, 15 separated from one another by the predetermined bending line 16 has at its end opposite the predetermined bending line 16, that is to say at the longitudinal end of the folding blank 12, a handle section 1o 'or 1o''which is attached via a predetermined tear line. The two handle sections 1o ', 10''form the handle 1o when the connector 4 is finished of the slide gate.

In the connection piece 4, the slide valve 6 is formed by the handle 10 and a slide slide band 19 which is firmly connected to it and which contains the through opening 11 and is arranged between the two base body layers 8, 9, while the handle 10 is located to the side of it. The closure slide band 19 consists of flexible material, in particular of relatively tear-resistant paper or the like. or a tissue. In the manufacture of the connecting piece 4, the procedure is such that the closing slide band 19 is folded with one end 19 'to one of the two handle parts, in the exemplary embodiment to the handle part 10', and with its other end 19 '' beyond the predetermined bending line before the folding blank is folded 16 sticks to the inside of the folded blank when folded. It goes without saying that the partial passage opening 5 ″ remains free in the cutting region 15 from the closure slide band 19, i.e. the tape end 19 ″ is glued between this partial opening 5 ″ and the predetermined bending line 16. If the slide slide tape 19 is fastened in this way, the folded blank is folded and the two cut areas 14, 15 are glued to each other on both sides of the slide slide tape, with the other handle section simultaneously 1o ,, to which the tape end 19 'already glued to the handle section 1o' is glued.

First of all, the folding blank according to FIG. 5 is cut out or punched out. Then you glue the closure slide tape 19 as shown in FIG. 6. In this context, it is expressly pointed out that the entire cutting area 14, apart from the handle section 10 ′ arranged on the end of it, is not glued to the tape 19. Beyond the predetermined bending line 16, the tape 19 remains unglued with the cutting area 15 up to the tape end 19 ″. If the closure slide band 19 is fastened in this way, the two cut areas 14, 15 are folded together in the manner shown in FIG. 7, with at least one of the two cut areas being coated with glue along its longitudinal edge areas and in the area of the handle part so that the the two cutting areas are glued to one another laterally next to the closure slide band 19 and on the handle 10 via the band end 19 '. This then results in the arrangement shown in FIG. 8, which can be used directly as a connector.

9 and 10, the two layers 8, 9 are drawn from each other at a greater distance than the reality, since otherwise the closure slide band could only have been shown more indistinctly.

As mentioned, the folding blank 12 has the two matching handle sections 1o 'and 1o' '. In principle, however, only one of these handle sections would suffice, namely the one to which the closure slide band 19 is glued before the folding blank is folded.

The folding blank 12 has in the region of the predetermined bending line 16 a window 2o in the form of a rectangular (corresponding to the dimension running in the direction of the predetermined bending line) that corresponds at least to the closure slide band 19 Detail, wherein the two cutting areas 14, 15 are connected to each other on both sides of the window 2o via a connecting web 21, 22. The predetermined bending line 16 is located only on these connecting webs 21, 22. It goes without saying that the end 19 ″ of the closure slide band is glued to the cutting region 15 between the partial passage opening 5 ″ and the facing window end. In the not yet folded state, the slide slide band 19 extends in the longitudinal direction of the folded blank over the window 20. In the folded state (FIG. 8) there is a U-like base body end through the window 20, the closure slide band 19 between the two connecting webs 21, 22 being visible from the outside. The two mentioned connecting webs 21, 22 can still be cut off after producing the arrangement according to FIG. 8, so that the connecting piece 4 shown in FIGS. 1 to 4 results. However, the connecting webs 21, 22 could also be left standing. In principle, the window 2o could also be dispensed with, so that the closure slide band would be covered as a whole. The appearance of the connector in this area depends primarily on the type of filter bag for which the connector is intended.

When the folding blank 12 is folded together with the glued-in closure slide band 19, the section of the closure slide band starting from the predetermined bending line 16 and facing the cutting region 15, which is glued with its end 19 ″ to the cutting region 15, lies over the band section which extends along the cutting region 14 , so that the slide valve band is double-layered here. This double layer Band area is opposite the handle 1o.

After completion of the arrangement according to FIG. 8 or the connecting piece 4 according to FIGS. 1-4, by gripping the handle 1o and exerting a pulling force directed to the side in the direction of the arrow 23, the two handle parts 1o ', 10' 'of the the cut-away regions 14, 15 forming the base body layers 8, 9 tear along the predetermined tear lines 17, 18, as a result of which the handle 10 is separated from the base body 7. During this pulling on the handle 10, the closure slide band 19 glued to it is taken along, so that the passage opening 11 moves away from the passage opening 5 and the closure slide band is pulled over the passage opening and closes it (FIG. 4). This band movement is made possible by the double layer of the band at the end of the connector opposite the handle. The dimension of the double-layer band area measured in the longitudinal direction of the band is reduced when the band is transferred into the closed position, as can be seen from a comparison of FIGS. 9 and 10.

The connector 4 is attached to the filter bag 1 with a handle 10 that has not yet been torn off. Only when the filter bag is filled and removed from the vacuum cleaner, do you tear off the handle 1o and pull the slider band into the closed position.

It has already been mentioned that when the filter bag 1 is fastened in the vacuum cleaner device, the connector 4 can be plugged onto a device-side connector which then projects into the passage opening 5 or through it. The connection piece to the inside of the sack can be slightly above the connection piece protrude. As a result, the transfer of the closure slide band 19 into the closed position is not or only slightly impeded, since the closure slide band consists of flexible material so that it can be pulled over the neck opening.

The other expedient embodiment according to FIGS. 11-15 is now explained below:

With this connecting piece 4a, a one-piece folding blank 12a (FIG. 14) is assumed, which can be folded into a three-layer structure. In this case, the cut area 24 which results in the middle layer and from which the cut areas forming the two other layers 8a, 9a, the outer layers, are bent towards opposite sides, seen in the area between two opposite guide parts 25, 26 of a strip-like shape with these connected slide slide section 29 via predetermined tear points 27, 28. This closure slide section 29 corresponds to the closure slide band 19 of the embodiment already described with regard to closing the passage opening 5a of the finished connecting piece 4a. In the case of FIGS. 11 to 15, however, it is a closure slide 6a, including the handle 1oa, which is part of the exit folding blank 12a made of cardboard or cardboard-like material.

In the finished connector 4a, the slide 6a forms, together with the two guide parts 25, 26 running next to it, the middle position between the two outer layers 8a, 9a. The slide gate section is in the folded state 29 overlapped by the two outer layers 8a, 9a at least on their longitudinal edge regions facing the guide parts 25, 26, that is to say at least in the vicinity of the predetermined tear points 27, 28. If the two outer layers 8a, 9a are glued to the guide parts 25, 26, the three-layer base body 7a is obtained. During this gluing, the slide gate section 29 is released. Therefore, after folding and gluing, the slide slide part 29 can be torn away from the guide parts 25, 26 by pulling the handle 10a, after which the slide slide part forms the slide slide 6a, which is guided by the outer layers 8a, 9a and the guide parts 25, 26 12, in which its passage opening 11a is no longer aligned with the passage opening 5a of the base body but is arranged apart from it, so that the passage opening 5a is covered by the closure slide.

The laterally protruding handle section 1oa of the locking slide can, as shown, be provided with gripping openings 3o for the fingers for easier gripping by hand.

The cutting area 24 which results in the middle position has a rectangular shape, apart from the handle 10a. At the edges of this rectangular cutting area 24, the cutting areas resulting in the two outer layers 8a, 9a are attached, so that the cutting area 31 resulting in the outer layer 8a is bent to one side and the cutting area 32, 33 forming the other outer layer 9a to the opposite side can. One of the two outer layer cutting areas, in the illustrated case the cutting area 31 is attached to the edge of the cutting area 24 forming the middle layer opposite the handle 10a, these two cutting areas 24 and 31 being separated from one another by the predetermined bending line 34. The folding blank 12a is completely slotted along the predetermined bending line 34 across the width of the slide slide, so that the slide slide portion 29 is not connected to the cut area 31, which facilitates the tearing of the slide slide. In the expedient embodiment, the cutting area 31 is only connected to the guide parts 25, 26 by left-over material points.

Said cutting area 31 has the same outer dimensions as the cutting area 24 forming the middle layer without the handle 10a, so that it completely covers it in the folded state. The passage opening 5a is formed on this cutting area 31. The passage opening 11a is arranged symmetrically with respect to the passage opening 5a with respect to the predetermined bending line 34, so that the passage opening 5a and the passage opening 11a overlap after the two cutting regions 24, 31 have been bent and laid on top of one another.

The outer layer 8a formed by the cutting area 31 represents the underside of the finished connecting piece 4a, with which the connecting piece is glued to the filter bag 1.

The cutting area 32, 33 forming the other outer layer 9a is parallel to the practical embodiment The direction of displacement of the closure slide 6a is attached to the edge of the cutting area 24 forming the middle layer. It is expediently provided that this outer layer cutting area is divided into two partial areas 32 and 33 of strip-shaped form attached to one of the two guide parts 25, 26. The sub-area 32 thus adjoins the longitudinal edge of the guide section 25 and the sub-area 33 adjoins the longitudinal edge of the opposite guide section 26, a predetermined bending line 35 and 36 running between each, so that the strip-shaped sub-areas 32, 33 can be bent. Said sub-areas 32, 33 are wider than the guide sections 25, 26, so that in the finished connecting piece 4a they overlap the locking slide 6a to the side to hold it in place. It goes without saying that the partial areas 32, 33 need not be wider than the guide sections 25, 26 over their entire length.

In the manufacture of the connector 4a, the folding blank 12a is used, after which the blanking area 31 is bent to one side and the two partial areas 32, 33 to the other side of the blanking area 24. Previously, the folding blank was coated with adhesive at the desired locations, so that only the guide parts 25, 26 are glued to the cutting area 31 on the one hand and to the two partial areas 32, 33 on the other hand, and the slide gate section 29 remains free. After the locking slide 6a has been torn away, it is guided along the edge of the guide parts 25, 26.

So that the torn slide 6a is not accidentally pulled out of the base body 7a, at least points a longitudinal edge of the slide slide part 29 or of the slide slide 6a and the edge of the facing guide part 25, 26 have a stepped course such that the detached slide slide 6a forms stops which prevent complete pulling out. This stepped course results from a corresponding course of the predetermined tear line 27, 28 together with a longitudinal slot 37 or 38 between the guide section 25 or 26 and the slide slide section 29. In FIG. 12, the connecting piece is drawn with the outer layer partial area 33 partially cut away, so that the lateral stop projection 39 of the slide slide 6a formed in the manner mentioned is visible, which comes to rest against the stop section 40 when it is pulled out against a stop step 40. In the case of the exemplary embodiment, the arrangement in this regard is the same on both sides of the slide.

Claims (9)

Method for producing a connection piece for filter bags or the like used in vacuum-cleaning devices for dust absorption, the connection piece comprising a base body to be fastened to the filter bag and having a passage opening corresponding to a dust inlet opening of the filter bag, with a multi-layer structure and flat shape made of cardboard or cardboard-like material, and one arranged on the base body between two base body layers and with a handle laterally protruding over the base body, which can be moved from an open position leaving the passage opening to the side into a closed position closing the passage opening, characterized in that the base body (7; 7a) an integral folding blank (12; 12a) is folded along molded-in predetermined bending lines (16; 34, 35, 36) and the base body layers lying on top of one another after the folding are glued together and that the Closing slide (6; 6a) at least is partly part of the folding blank and is connected to the rest of the folding blank via predetermined tear points (17, 18; 27, 28), so that the locking slide can be torn aside after folding and gluing. A method according to claim 1, characterized in that the foldable blank (12a) can be folded into a three-layer structure and the cut area (24) which results in the middle position, seen in the area between two mutually opposite guide parts (25, 26), one with these via predetermined tear points ( 27, 28) forms a connecting slide part (29) which, in the folded state, is overlapped by the two outer layers (8a, 9a) at least on their longitudinal edge areas facing the guide parts (25,26), which are released with the guide parts (25,26) the slide valve section (29) are glued so that the slide valve section can be torn aside from the guide parts and then be pushed as a slide valve under guidance on the outer layers and the guide parts into the closed position. Method according to Claim 2, characterized in that one of the two outer-layer cutting regions is attached to the edge of the cutting region (24) forming the middle layer opposite the handle (1oa). Method according to Claim 2 or 3, characterized in that one of the two outer layer cutting regions is attached to the edge of the cutting region (24) forming the middle layer parallel to the direction of displacement of the closure slide, this outer layer cutting region being divided into two can be divided in each case to one of the two guide sections attached areas (32, 33) of strip-like shape. Method according to one of claims 2 to 4, characterized in that at least one longitudinal edge of the slide slide section (29) and the edge of the facing guide section (25 or 26) have a stepped course such that the detached slide slide (6a) against a complete Pulling out stops (39, 40) from the base body (7a) are formed. Method according to Claim 1, characterized in that the foldable blank (12) can be folded into a two-layer structure, at least one of the two cut regions (14, 15) separated from one another by the predetermined bending line (16) at its end opposite the predetermined bending line, using a predetermined tear points Has slide slide handle section (1o ', 1o' '), and that before folding a flexible slide slide band (19) at one end to the handle section or to one of the two handle sections and on the other side beyond the predetermined bending line to the folded blank top side inside when folded is glued, after which the folded blank is folded and the two cut areas (14, 15) are glued to each other on both sides of the slide valve band (19) so that the handle section can then be torn away to the side and the slide valve band can be pulled over the opening by pulling on the handle section. A method according to claim 6, characterized in that in the presence of a matching handle section on other cutting area, the other handle section is glued to the end of the closing slide band simultaneously with the gluing of the two cutting areas. Method according to claim 6 or 7, characterized in that the folding blank (12) in the region of the predetermined bending line (16) has a window (2o) corresponding at least in width to the locking slide band (19), on both sides of which the two blanking areas (14, 15) are connected to one another via connecting webs (21, 22). Method according to Claim 8, characterized in that the connecting webs (21, 22) are separated from one another after the cutting regions (14, 15) have been glued.

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