DE1778477A1 - Hose and method and apparatus for its manufacture - Google Patents

Description

DR.-IN ·. DIPl IN «. U.SC. OIPL.-PHY ». OR. OICL-PHYS. HÖGER - LEGAL RIGHTS - GRIESSBACH - HAECKER PATENT LAWYERS IN STUTTGART 177RA77

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USSer.No. 635 818
USSer.No. 649 711

Minigrip Europe A / S, Copenhagen, Denmark

Hose and method and apparatus for its manufacture

The invention relates to a hose, a method and a device for the continuous production of such plastic tubes, the closure elements wear, which can be closed and reopened as often as desired, the hoses mainly for production of pouches or pouches, '

It is already known to manufacture flexible plastic bags from a thin tube on the surface thereof directly by injection or extrusion from a nozzle sealing ribs or sealing strips with complementary Profiles are formed which can be hooked together by flattening the thin tube, the aforementioned Closing strips are elastically engaged. The hose is then divided into cross sections,

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the ends of which are welded together along partial lines, a slot is provided in the direction of the hose generation, which is located in the vicinity of the sealing strips ", through which access to the inside of the bag is possible.

This type of manufacture has the advantage of simplicity, but has certain disadvantages. The optimal injection or extrusion speeds for such a thin film and for properly profiled, thicker sealing strips are not the same. In addition, the presence of the sealing strips on the hose creates uneven tensions in the interior of the plastic as a result of the stretching during inflation and prevents the material from cooling evenly. In addition, it is desirable to choose materials on the one hand for the hose and on the other hand for the profiled sealing strips which result in optimal properties for each part. ^w THE INVENTION The object is now based, to be attached to a closed tube separate closure elements, so that the best characteristics for tubing and sealing elements can be selected. According to the invention, this object is achieved in that profiled closure strips are attached to the inner or outer surface of the thin plastic hose after it has left its spray nozzle, preferably in the form of tapes, these

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Closure strips are produced independently of the formation of the hose, preferably also by extrusion.

Advantageously, the profiled closure elements come into contact with the film of the hose at one point brought to which the hose inflated by compressed air is soft and sticky.

It is beneficial if .the closure elements before they ™

are brought into contact with the still soft and adhesive hose, are subjected to preheating, about the temperature difference between the hose and the profiled sealing strips before fastening, in particular welding onto the hose, to reduce or, if necessary, to eliminate it completely.

The welding of the profile strips on the hose can be carried out by a heating device, which acts like a sufficiently remote from the spray head point where the tube is already cold.

When it comes to the locking elements on the To weld the inner side of the hose, an insertion channel for these elements is provided in the spray head, which is located on the The circumference of the spray head begins and inside the spray nozzle on the core of the same, i.e. within the spray gap, ends.

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When it comes to the. Closure elements on the. Attaching the outside of the hose is preferred a longitudinal weakening, preferably in the form of a groove or groove, is provided in the hose wall and under the closure strips, which allows the hose wall to be torn open when the closure is opened, or the hose wall is cut under the sealing strips in the longitudinal direction of the hose. That way is the inside of the hose or the bags obtained by dividing the bags "when opening the Closure accessible from the outside.

Further advantages and features of the invention emerge from the following description and drawings, which Embodiments of the invention included. In the drawing show:

Pig.1 shows a schematic longitudinal section through a spray head and one produced by this spray head Hose and furthermore the means for introducing the profiled sealing strips into the hose and to fix this according to a first embodiment behind the spray gap on the inner surface of the hose,

Pig.2 shows a partial section through the application device Fig. 1, but on a larger scale than this,

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3 shows a partial section along line III-III of FIG. 2, however on a larger scale than this,

4 shows a horizontal section along line IV-IY of FIG. FIG. 5 shows a partial section along line V-V of FIG. 1, FIG. 6 shows a diagrammatic view of a flattened one

Hose made of pliable, flexible plastic, which herge- ^ according to the first method according to the invention is and explains the division of the same into bags, FIG. 7 is a schematic, perspective partial view of a

second method according to the invention for application. the locking strips,
FIG. 8 shows a partial section along line VIII-VIII of FIG. 7 on a larger scale than this,

9 shows a partial plan view to explain a method step of the method according to FIGS. 7 and 8 on a larger scale than this, _Λ

10 is a schematic perspective view of an apparatus for performing the method according to Figure 9, Figure 11 is a partial section according to line XI-XI of Fig.9, Fig.12 is a schematic perspective view of a device for 'carrying out a third method according to the Invention,

13 shows a partial section along line XIII-XIII of FIG. 12 on a larger scale than this.

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A hose made of a plastic film "1. is produced by injection or extrusion from an injection gap 2 of an injection head 3, which one by heating deformable material, for example polyethylene or polyvinyl, is fed to such a kind as it can be used for thin films.

The plastic material is fed to the extrusion head 3 in the direction of arrow 4 via a feed device (not shown). The hose 1 is guided at a certain distance from the spray head over guide rollers 5, 6, 7, which flatten it and feed it to a device on which it is either wound up or in which it is immediately processed into individual bags. ^

Between the spray head 3 and the guide roller 5, the hose is inflated in the transverse direction by means of a channel 8 to the spray head is widened, what makes the hose walls thinner and is prevented, that the walls that are still sticky when exiting the spray head touch each other, which could cause them to weld together. the Hose walls obtained in this way are usually very thin and their thickness is usually of the order of magnitude of 0.02 to 0.2 mm.

According to the invention, as shown in the figures, the The hose is completely independent of the sealing strips 15 and 16.

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placed separately, usually by extrusion or Syringes, preferably in the form of ribbons, are produced and with the hose behind the spray head 3 (see Fig. 4) are combined, preferably at a point where the hose wall is still soft and sticky.

According to a first embodiment of the invention -

the closure strips 15 and 16 from a generating device or a supply (not shown) the interior of the hose 1 via a channel provided in the spray head 3 17 supplied, as indicated by the arrow 18 (Fig.l) is. The feed speed corresponds to the speed used for extruding or spraying the hose.

In certain cases it is advantageous to preheat the sealing strips, the occurrence of voltages to the touch like their cold plastic material with the still hot tube to be avoided. A heating device can be provided for this purpose (see Pig.l). Since the locking strips are preferably hooked together before being inserted into the channel 17, the strips are preheated in such a way that no melting occurs.

When the sealing head leaving channel 17 of the spray head

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afford 15,16 are engaged with each other, they will clamped between two sections of the hose 1,

on
the wall of which is folded by pinch rollers 20, 21 acting on the outer surface of the hose, a partition plate 22 being located inside the hose at this fold. The closure strips 15, 16 are fed to the fold of the hose wall, as shown in FIGS. 2 and 3.

Both closure strips 15, 16 preferably each have at least one or preferably two flat fastening strips, which extend laterally from the locking strips to be hooked. These fastening strips of the closure strip 15

. and

are denoted by 15a, 15b for the closure strip 16 with 16a, 16b and form the edge parts, with the help of which the Closure strips attached to the hose 1, in particular welded on, can be. At the point where the attachment or welding is carried out, the separating plate 22 is placed between the two closure strips to separate them introduced and thereby forms an abutment for the Kleram rollers 20 and 21, which are in particular designed as welding rollers, whereby it is prevented that the hooked parts are welded together by the welding heat.

The partition plate 22 contains heating means, in particular heating resistors 23 and 24, which are the plastic material of the fastening strips 15a, 15b and 16a, 16b soften and the welding

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ensure the strip with the hose 1. The partition plate is held by the middle section 3a of the spray head 3 via a rigid arm 25 which is arranged in the interior of the hose (see I ¹ Ig.1).

The pinch rollers 20, 21 toward each other are pressed by unillustrated force store, so as λ a corresponding apply the pressure and to press the tube 1 firmly against the fastener strips 15a, 15b and 16a, 16b of the sealing strips. 15 and 16 The means to keep this energy storage device, for example springs, and the pinch rollers outside the hose, are not shown.

In the partition plate 22, grooves 26, 27 are provided for receiving the closure strips 15, 16, with the web between them Grooves does not contain heating resistors,

In a modified embodiment, the heating means in the pinch rollers instead of in the partition plate 22 or there in addition to the aforementioned heating means of the partition plate be arranged,.

Additional print rolls 28 and 29 (Pig, 2) bring the Closing strips 15 and 16 behind the partition plate again engage with each other (see Fig. 2), the hose 1, on which now

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the closure strips 15 and .16 are attached, runs before winding, as in the known devices, over the Guide rollers 5, β and 7 to prepare it for the formation of a winding or. To it immediately afterwards, like mentioned above, to be divided into bags.

fe The closure strips and in particular their fastening strips are advantageously warmed up to a temperature of the order of magnitude of preferably 40-60 before being fastened to the wall of the tube 1 and combined with the wall of the plastic tube at a suitable point, which is determined by the distance that this point separates from 'the injection gap, so that the plastic is still soft • and a temperature preferably of the order of 100- 130 ⁰ C.

) The fastening strips are preferably fastened on the tube near the point where the tube assumes its maximum diameter when inflated.

In some cases, the closure strips through their Passage through the spray head provides sufficient preheating so that additional heating can be dispensed with.

In certain cases, a closure strip can be combined with the inner surface of the hose before it makes the fold

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ler hose walls reached. Furthermore, the ■ closure strips can also be connected separately to the softened plastic material of the hose, whereupon they are later connected to each other get hooked.

The locking strips can take various forms. For example, the closure strip 15 according to FIG. 3 can be a {( Groove profile with two hook parts facing one another ■ approach, and the closure strip 16 can have a rib profile in the manner of a T, the head of which can be inserted between the hook parts of the other locking strip.

The Fig.6 shows "for example, how individual bags thereby can be produced that the hose is separated and the walls lying one above the other along the transverse separation lines 9, 9a be welded,

The hose 1 can then subsequently be slit longitudinally along the line 10 between the closure strips 15, 16 along the outer edges of the bevel tabs 13 and 14 are located, which can be gripped by hand to separate the locking strips 15 and 16 and allow access to get to the inside of the bag. In order to close the bags again, the sealing strips are through with each other a finger pressure on the outside hooked.

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According to a further embodiment, the prefabricated. Closing strips, which in this case also preferably have the form of tapes with fastening strips, on the Attached to the outside of the hose. In FIGS. 7-13 various advantageous embodiments of this fastening are shown the closure strips on the outside of the hose after it has left the spray head. Furthermore, means are shown for opening the hose between and below the closure strips in order to gain access to the Get inside the hose.

The embodiment shown in Figure 7 has in the

30th

To form the spray gap serving to form the hose, a projection 31 which reduces the thickness of the spray gap

ί and a weakening groove 32 is created in the tube 1 above

[ which the sealing strips are attached to the hose.

ρ In this way the hose wall can be opened without difficulty later below the closure along the weakening groove - 32 are torn when the closure strips 33,34 be separated from each other, for example after the tube with the closure strips has been processed into bags.

The edges of the injection gap part, which creates the weakening groove, form the edges of the access opening of the bags when one of the closure strips is

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tab 35 exerted tension from the other closure strip is separated. This train can also separate one edge of the opening from the other.

The bag can be closed again by applying pressure on the outer opposite sides of the bag is exercised, whereby the two locking strips then come into engagement with one another again.

As shown in Pig. 8, the locking strips 33 and a fastening strip 36, 37 only on one side, the fastening edges 36a, 37a of which are fastened to the hose 1. The closure strips 33, 34 are hooked together and the fastening edges 36a, 37a are heated before the closure strips can be applied to the outer surface of the hose 1.

For this purpose, the sealing strips 33, 34 pass through a heating plate 33 in which there are electrical heating resistors 39, 40 which are arranged in the heating plate in such a way that, above all, the fastening strips on the fastening edges 36a, 37a are heated.

When the closure strips 33, 34 reach the surface of the hose as shown in FIG. 7, pressure rollers 41, 42 press the labeling strips or /. their fastening edges 36a, 37a

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against the outer surface of the tube 1, which is introduced by inserting inflated by air.

At the level of the pressure rollers 41 and 42, the hose 1, which has just left the spray gap, is still adhesive, in such a way that the preheated fastening strips or their fastening edges 36a, 37a are attached in a favorable manner and unite with the hose wall by welding, which becomes final after cooling.

Because now only the outer fastening edges 36a, 37a the fastening strips 36,37 are preheated and pressed against the tube and because the central part of the Closure strips carrying closure profiles are neither preheated nor pressed against the hose, it hangs Do not participate in the hose.

As follows from Mg.8, the weakening groove 32 is located between the fastening strips or their fastening edges 36a, 37a in such a way that when the closure strips 33 and 34 are separated from each other, the hose 1 can be torn along the weakening groove 32 to gain access to To get the inside of the hose.

This process is preferably only carried out when the tube has been made into bags,

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" ¹⁵ BAD ORIGINAL

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In some cases the hose can also be used for other purposes, for example as a protective hose for electric wires. In this case, the hose is slit along the weakening groove 32 when used for the first time, i.e. when the closure strips 33, 34 are first opened by lifting the gripping tab 35 or by some other means Means, for example a slide, are separated.

The plastic tube can also be produced without the weakening groove.

According to a further embodiment of the invention, a continuous cutting device can be provided in order to cut the hose open in the longitudinal direction, be it when joining the hose with the closure strips or be it preferably before this point.

Such a device is shown in Figures 9-11 *

The hose 1 according to FIG. 10 was injected from an annular spray gap of a spray head (not shown) which had no projection 31 according to FIG. The closure strips 33> 34 are fastened to the hose surface by fastening edges 36a, 37a, as was explained in more detail above.

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The hose 1 with the sealing strips attached to it 33,34 is flattened after passing a pair of pressure rollers 43, 'before a welding device for Welding of the sealing strips 33,34 on the hose is achieved. The hose has when it arrives at the Flat spot had enough time to cool off.

W Pig.Ii shows how the closure strips 33, 34 are fastened to the surface of the hose with their fastening edges 36a, 37a.

At a certain distance from the pressure rollers 43 is a Separating finger 44 is provided, which separates the locking strips which are in engagement with one another from one another, in such a way that that a cutting device 47 has access to a part of the hose which is located below the closure, so that the hose can now be cut lengthways.

The interlocking parts of the locking strips 33,34 have the Form of grooves 45 and ribs 46 with complementary profiles that interlock when pressed together and separate from each other if they act in the opposite direction. Therefore, the separating finger 44 can separate the interlocking profiles 45 and 46, when inserted between these profiles,

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In the by the separating finger 44 between the hooking profiles 45, 46 the slicing device 47 is introduced. This slicer has a Shoe 48 with a smooth surface that extends into the interior of the hose 1 and a sharp knife 49 carries, which faces the feed side of the hose for cutting open the same.

The longitudinal slot produced by the knife 49 lies between the connecting zones of the fastening edges 36a, 37a of the Closing strips with the hose. It now allows access to the inside of the hose between the closure strips 33, 34.

While the hose and sealing strips continue to move, the closure strips are brought into engagement with one another again with the aid of the pressure rollers 50, 51. The pressure roller 50 presses the rib 46 into the hat 45 so that the locking strips 33,34 form a closed tube together with the hose, the slot according to FIG Closing strips is.

In the construction according to FIGS. 12 and 13, a spray head 52 is shown with a spray gap 30 through which a hose 1 can be produced by spraying. In the injection gap 30, a projection 31 is provided which. a weakening groove in the hose

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32 generated, along which .the hose can be separated if one exerts a train in opposite directions on its walls on both sides of the weakening groove 32. The closure strips 33, 34 guided by the pressure rollers 53 are pressed against the hose.

™ With this construction, the locking strips are 33,34 welded to the hose at a point where the hose is cold and therefore no longer sticky.

The fastening edges 36a, 37a are thereby against the hose surface by a pair from outside the hose 1 * located welding rollers 54,55 and one opposite the ■ Welding rollers arranged in the interior of the hose counter plate 56 pressed so that the closure strips, as in lig.13 ^ shown, be welded to the hose. The counter plate is mounted inside the hose on supports 57 which it is attached to the core of the spray head 52 present within the spray gap 30.

The parts of the fastening strips 36, 37 that are directly next to the closure elements of the closure strips 33, 34 are not attached to the hose surface, since the heating required for welding is limited to the fastening edges 36a, 37a of these strips.

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In the embodiments of the invention according to Pig. 7-12 Closing strips are preferably used, each of which has several hooking elements that are in the form of one-sided Have hooks (see Figures 8, 11, 13).

With the help of the prescribed method according to the invention and rub: -o ^ r. becomes a flexible hose with lengthways Encrypted most specifically for the ™ Production of bags with openable and closable closures • is suitable. Such hoses have it the following advantages:

1. The production speed is increased. All parts can be produced with optimal injection speed will. At the same time, the profile of the sealing strips is generated with greater accuracy.

2. It can now be particularly suitable materials on the one hand for the actual hose and on the other hand for the Sealing strips are chosen, which often have to have very different characteristics, because the film of the hose should advantageously be very flexible and correspondingly have a high resistance to tearing its very small thickness, while the closure elements have a certain elasticity and a very should have a small coefficient of friction,

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3. Compared to the method according to which the hose wall and the closure elements are made by spraying the same! Injection gap are generated, there is the advantage that internal stresses and deformations by simultaneous cooling of the hose and closure elements when "stretching the hose in the presence of the Elements are avoided.

4. If the closure elements on the outside of the · ' Hose are attached and the hose has a weakening to tear open, you get a bag with double lock, one of which by the locking profiles that can be opened and closed as often as required and the other as a kind of guarantee seal is formed, which is not outside but inside the Closing elements of the bag are located in accordance with the explanations above.

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109853/0690

Claims (1)

A 35 991 h h - ta 4/30/68 - 21 - Claims: 1. Plastic hose made of flexible plastic, with two "as often as required openable and closable closure elements" extending along the length of the hose, which are attached so that the part of the hose on one side of the closure elements is a multiple of that on the other side In part, it is characterized in that the locking elements (15, 16) are in engagement with one another and are attached to the hose (1), in particular by welding (Pig. 1-3). 2. Plastic hose according to claim 1, characterized in that the closure elements (15,16) on the inner or outer hose (l) are firmly attached, in particular by welding (Fig. 1-3, Fig. 7 - 12). 3. Plastic hose according to claim 1 or 2, characterized in that that the closure elements (15, 16) are in engagement with one another (Pig.1-3). 4 ·· plastic hose according to one of the preceding claims, characterized in that the hose (l) and the closure elements (l'5,16) are made of different materials are. - 22 - 109853/0590 . h - ta "
4/30/68 - 22 - 5. Plastic hose according to one of the preceding claims, characterized in that the hose (l) a weakening between the locking elements (33, 34) (32) has or has been cut through (Pig. 10-12). 6. Plastic hose according to one of the preceding claims, characterized in that the closure elements (33, 34) have several one-sided hooking profiles (45, 46) (Fig. 11). 7. Plastic hose according to one of the preceding claims, characterized in that the closure elements (33 ^ 54-) lie on top of each other (Fig. 11-13), 6. Plastic hose according to one of the preceding claims, characterized in that the closure elements (33, 34) are fastened on the outer tube (1) and that a fastening strip extends from a closure element (34) (37) extends to one side, the fastening edge (37a) of which is firmly connected to the hose (l), and that the other closure element (33) has a fastening strip (36) extending to the other side, the The fastening edge (36a) is firmly connected to the hose (l) (Fig. 11-13). 9. Plastic hose according to claim 8, characterized in that that the outer closure element (33) opposite to the fastening strip (36) has a gripping tab (35), 109853/0590 " ₂₃ . A 35 991 h h - ta 4/30/68 - 23 - 10. Method of continuously producing a continuous Plastic hose made of flexible plastic with "open and close as often as you like, in 'Longitudinal direction of the hose at its Y / and firmly arranged Closure elements, preferably for the production of sacks and bags, which hose by injection molding or extrusion is produced, according to any one of the preceding claims, characterized in that the. Closure elements (15, 16) are produced independently of the actual hose (1), preferably by injection molding and attached to the outside or inside of the hose (l) that has been sprayed out, with the speeds of movement in the forward direction when connecting the hose (l) to the closure elements (15,16] are essentially the same. 11. The method according to claim 10, characterized in that the closure elements (15, 16) or preferably only their Edges (I5a, l6a) before connecting to the hose (l) be preheated. 12. The method according to claim 10 or 11, characterized in that the closure elements (15, 16) prior to fastening are brought into engagement with one another on the hose (l). - 24 - 109853/0590 r ·· . A 35 991 h
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4/30/68 - 24 - 13. The method according to any one of claims 10-12, characterized in that that the closure elements (15, 16) are connected to one another following the attachment to the hose (1) be engaged «. 14 «Method according to one of claims 10-13, characterized in that that the closure elements (33,34) are "attached by welding". 15. The method according to any one of claims 10-14, characterized in that that the closure elements (15, 16) are in the form of straps before they are fastened. 16. The method according to any one of claims 10-15, characterized in, that the closure elements (33,34) have lateral fastening strips (36,37) that connect to the hose (l) be firmly connected. 17. The method according to claim 16, characterized in that the closure elements (33,34) on both sides fastening strips (36, 37) have. 18. The method according to any one of claims 10-17, characterized in that the zone of the closure elements (33,34). on which the closure profiles (45, 46) are located, are not connected to the hose (1), in particular when the closure elements (33, 34) are attached on the outside. 1098S3 / 0SÖÖ -25- η - ta 4/30/68 - 25 - 19, the method according to any one of claims 16-18, characterized in that that only the fastening edges (36a, 37a) the fastening strips (36,37) are firmly connected to the hose (1), 20, method according to claim 16, characterized in, that the closure elements (33,34) have fastening strips (36,37) only on one side, which are only attached to the Fastening edges (36a, 37a) of the same are firmly connected to the hose (I), Method according to one of Claims 10-20, characterized in that a weakening (32) is produced in the tube wall in the longitudinal direction and the closure elements (33, 34) are preferably on the outside of the tube (1) on both sides of this weakening ( 32), Λ 22, the method according to any one of claims 10-21, characterized in that that the hose (l) is cut open between the closure elements (33,34), 23, the method according to any one of claims 10-22, characterized in that that the closure elements (15, 16) are inflated by blowing in air after ejection Hose (1) can be applied while the hose (l) is still soft and / or sticky, 109853/0590 - ² ^ - BATH h - ta 30.4.68 -26 - 24. The method according to claim 23, characterized in that the closure elements (15, 16) .. on the inflated tube (l) be attached approximately at the point at which the hose (l) has its maximum diameter. 25. The method according to any one of claims 23 or 24, characterized in that the closure elements (15, 16) P the opposite inner surfaces one in the wall of the hose (l) made folding. 26. Device for performing the method according to one of claims 10-25, characterized in that a heating device (l9) is provided, which is before the * Position is arranged at which the locking elements (15,16) be connected to the hose (Fig.l). 27. Device according to claim 26, characterized in that that the heating device (19) is such that the closure elements (15, 16), which in the hooked state the · Run through the device, preferably only on the fastening rims (I5a, 15b; 16a, l6b) can be heated (iig.l). 28 * Device according to one of claims 26 or 27, characterized characterized in that a pair of pressure rams (28,29) is arranged behind the connection point, with the help of which the "When fastening separate closure elements (15, 16). can be brought into engagement again (Pig.1-3). 109853/0590 " ²⁷ " May 2, 1968 29. Device according to one of claims 26-28, characterized that pressure rollers (21, 22) are provided, which are preferably designed as welding rollers (Fig. 1-.5). ·. 30. Device according to claim 29, characterized in that a counter-pressure member (22) cooperates with the pressure rollers (20, 21) (Pig. 1-3). 31. Device according to one of claims 29 or 30, characterized in that that the pressure rollers, which are preferably designed as welding rollers (54, 55), only on the Fastening edges (36a, 37a) of fastening strips '(36, 37) of the closure elements (33 »34) act in such a way that only these and not the zones of the interlocking profiles of the closure elements (33, 34) are connected to the hose (1) (Pig. 11-13). 32. Device according to claim 30 or 31, characterized in that the counter-pressure member (22) and / or the pressure rollers (20, 21) Have heating elements (24) in order to heat the parts to be connected, preferably to welding heat: (Pig. 1-3). 33 · Device according to one of claims 30 - 32, characterized in that that the pressure rollers (20, 21) by energy storage, especially springs, against the outside of the hose (1) are pressed (Fig. 1-3). - 28 - 109853/0590 h - "ta 4/30/68 - 28 - 34. Device according to one of claims 26-33, characterized in that for weakening ″ (32) of the hose (l) ' a projection (31) in the spray gap (30) of the spray head (3) is provided (Fig. 7). 35. Device according to one of claims 26-34, characterized. that for feeding the closure elements (15,16) a channel (17) is provided which is located on the circumference of the The spray head (3) begins and ends on the surface of the core (3a) of the spray head (3) (Fig.1-3). 36. Device according to claim 35, characterized in that to form a fold of the hose (l) at a distance from the spray head (3) inside the hose (l) the Counter-pressure member (22) is provided, on both sides of which outside the hose (l) there is a pressure roller (20,21) is provided whose axes are parallel to each other and perpendicular to the fastening direction of the hose (l) are arranged in such a way that when running along the closure elements (15, 16) on both sides of the counter-pressure member (22) these closure elements (15, 16) by the pressure rollers (20,21) can be pressed against the inner wall of the hose (1) (Fig. 1-3). - 29 109 8 5 3/0590 h - ta 30.4.68 - 29 - 37 «Device according to one of claims 3t? or 36, thereby characterized in that the counter-pressure member (22) has a hat (26, 27) on both sides for receiving the closure profiles (Pig. 1-3). 38. Device according to one of claims 35-37, characterized in that that the one between the grooves (26,27) located part of the counter-pressure member (22) free of ^ Heating elements (24) is (Pig.1-3). 39. Device according to one of claims 30-38, characterized in that the counter-pressure member is a plate (22) is, which is arranged approximately in the longitudinal direction of the hose (l) radially. 40. Device according to one of claims 30-39, characterized in that the counter-pressure member is a separating plate (22), with the aid of which the closure elements (15, 16) can be separated (Pig. 1-3 ) before being attached to the hose (1) ), 41. Device according to one of claims 26-34, characterized in that "when the closure elements (33, 34) are attached to the outside of the hose (-1), a separating element is used to separate the hooked closure elements (33, 34), preferably in the form of a separating finger (44), - 30 109853/0590 h - - ta 4/30/68 - 30 - and behind this a cutting member (49) for cutting open the hose (1) between the fastening edges (36a, 37a) are provided (Fig.10, 11). 42. Device according to claim 41, characterized in that the cutting member (49) is attached to a shoe (48), which is located inside the hose (1) and is preferably firmly connected to the separating member (44) (Fig. 10, 11). 43. Device according to claim 42, characterized in that the shoe (48) extends on both sides of the cutting member (49) extends and over it the edges of the hose (1) * run along the cut slot (Fig. 10, 11). 44. Device according to one of claims 41-43, characterized in that pressure rollers (50, 51) are arranged behind the cutting member (49) which bring the closure elements (33, 34) back into engagement (Fig. 10). 45 «Device according to one of Claims 41-44, characterized in that, for welding, the closure elements (33, 34) are pressed against the outside of the hose by pressure rollers (54, 55) designed as welding rollers, and a counter-pressure member (1) inside the hose (1). 56), preferably in the form of a plate, is arranged, which is carried by the core (3a) of the spray head (3) (Pig.11-13). 109853 / 0S90 Blank page