AT414232B - FILLABLE UPHOLSTERY AND METHOD AND DEVICE FOR PRODUCING A CUSHIONER - Google Patents

Description

2

AT 414 232 B

The invention relates to a pad that can be filled, a method and a device for assembling fillable upholstery, in particular air - inflatable upholstery, in which at least two plastic films are welded together along a contour of the upholstery so as to form a fillable cavity, and a method and a device for 5 Fill empty cushions with gas.

Cushions and combinations of cushions are known which protect the corners and / or edges of parallelepiped articles to be packaged, see for example WO 98/23502. However, these upholstery have the disadvantage that only the edges and the corners are protected io, the surfaces remain unprotected, which does not provide the necessary protection on the underside or the top of the objects, especially for large objects.

US Pat. No. 5,803,263 A, US Pat. No. 6,244,441 B1 and WO 98/29319 show pads which additionally protect a surface of a parallelepiped object.

It is therefore an object of the present invention to provide a cushion that is as simple and easy to fasten as possible, which surrounds not only edges and corners but also at least one surface of the object to be protected. 20

The object is achieved by a pad according to claim 1. With this now four corners, two edges and a surface of the object can be padded, wherein the pad is held by the recesses at its longitudinal ends at two corners in position. With two of these pads, all corners of the article can be padded and given if in addition two surfaces, so about the base on which the object rests in the packaging, such as a box, and the top surface.

So that the pad can be guided around the corners of the object when it is later placed around the object, it can be provided that the pad consists of several Teilpols-30 tern, in particular with separate chambers consists. So for example from a partial pad having a completed fillable chamber, for the first edge to be protected, and another part pad, which also has a closed fillable chamber, for the second edge to be protected. Between the partial cushions, the pad can then be folded and guided around the corner. It would also be possible for the two partial cushions 35 to have a common fillable chamber. On the other hand, the individual partial pad itself could also have a plurality of inflatable chambers, which increases safety if a chamber should leak.

One possible embodiment provides that in each case a partial pad is provided for the 40 edge to be protected, which has a recess with which the partial pad can be plugged onto the edge to be protected. This is achieved, for example, by rectangular ring cushions whose recess is substantially as long as the edge of the object to be protected. In this case, the two partial cushions can be connected to each other by a band or by another partial pad. The band has the advantage that it can be easily manufactured, but the disadvantage that it can protect the spanned surface of the object only limited, they are thus protected mainly by the over the edges projecting part pads. Another part pad between the two partial pads for the two edges so has the advantage that the spanned surface of the article is also padded and opposite to a package in which the object is arranged together with pad, held in position.

In order that the partial cushions for the edges remain better in position, it may be provided that, in the case of at least one partial cushion, the recess in the middle has a smaller width 3

AT 414 232 B than at the ends. The partial padding has e.g. then no longer the shape of a rectangle, but the portions of the pad, which are arranged along the edge of the object are moved to each other, so that the rectangle of the shape of an "8" approaches. It is another object of the invention to provide a method and apparatus for making upholstery (make-up and inflation).

Fabrication is understood as the production of welds along the desired contours of the pad. It is known from the prior art to use thermal welding processes for the manufacture of fillable upholstery. These have the disadvantage that the quality of the welds is not satisfactory due to the relatively large heat-affected zone of the stamp used. It can form hairline cracks in the plastic film, can escape through the air later. In addition, the method is inflexible through the use of stamps, only large quantities of one and the same pad can be produced economically.

From WO 00/44644 A1 it is known to use ultrasonic welding for the production of packaging pads. It is therefore an object of the invention to provide an alternative method of welding plastic films which overcomes this disadvantage.

This object is achieved by the method according to claim 9 or by the device according to claim 15. 25

Ultrasonic welding has hitherto been mainly used to weld non-deformable plastic moldings which have significantly greater thicknesses (> 1 mm).

The principle of ultrasonic welding is based on the fact that ultrasound vibrations are transmitted to a sonotrode by a gene radiator. The sonotrode transmits the ultrasonic vibrations to the plastic films and is pressed onto the plastic films arranged on a flat support surface (for example a glass plate). The ultrasonic vibrations generate frictional heat at the joining surfaces of the plastic films and the plastic film is brought to a viscous flow. After cooling, the welded joint is tight. 35

As plastic films are understood here thermoplastics having a thickness of at most 200 pm. The preferred thickness for air-inflatable high strength pads is between 80 and 150 microns, especially 90 microns. Examples of usable films are HD-PE (high-density polyethylene, has low gas permeability), or composite films with a preferably gas-impermeable, solid layer, which is usually poorly weldable (eg polyamide films, PA), and a good weldable layer ( Eg polyethylene films, PE), so about PA-PE films. For the use of the produced cushion as air cushion in the packaging industry, the use of such plastic films with high strength and low gas permeability is an important prerequisite because the pad there for fixing objects in containers, to absorb shocks and shocks, and to fill Cavities are used in packaging. These functions must also be maintained during extended storage of the upholstery (it must not exhale too much air from the upholstery) or under impact by impact, so low external pressure and / or extreme temperature fluctuations (transport by air).

However, the cavity of the pad can be filled except with gas with another fluid, namely with a liquid or with a gel. 4

AT 414 232 B

As a starting material for upholstery, both individual separate plastic films in question, or a plastic film, which is beaten or a hose.

The ultrasonic welding can be done in principle in two ways: by a sonotrode 5 along the contour of the pad, in particular spatially linear in three axes, or moved by a sonotrode for a period of time on the plastic film rests, so as a sonotrode as a stamp, the shape has the weld to be produced and is movable normal to the welding plane is pressed onto the plastic film. The time span depends on the thickness and the melting point of the plastic film. 10

The first variant has the advantage that any contour can be produced, which speaks in favor of the use for the upholstery according to the invention, since own upholstery has to be produced for each article of different dimensions. The second variant is advantageous if the same contour is to be produced often, which can be done much faster, 15 than if the contour has to be traveled several times by a sonotrode.

In the first variant, the invention provides for the sonotrode to be rotated in the case of curved contours about an axis normal to the welding plane such that the sonotrode is aligned tangentially to the contour. This ensures that the sonotrode is always aligned in the direction of the weld seam, which ensures a proper weld seam of consistent quality.

Furthermore, in the first variant, it is advantageous if the movement of the sonotrode is electronically controlled on the basis of any given contour. For example, the contour can be stored in a file on a computer and forwarded directly to the control device of the sonotrode. The control means may be used e.g. be connected to a CAD station.

The first variant can be carried out with the help of a so-called plotter. The ultrasonic welder is mounted on this 30 and can be moved linearly in space along three normally-spaced axes, with the additional possibility of rotation about the axis normal to the welding plane.

In order for a particularly uniform weld seam to be produced, it can be provided for both variants of the ultrasonic welding that the contact pressure with which the sonotrode is pressed against the plastic films is regulated. This ensures a constant pressure and a consistent quality of the weld.

In order for the pads to be easily released from the surrounding material (other pads, remaining plastic film) after the weld has been made, an embodiment of the invention provides that the sonotrode produces a perforation or a continuous cut in the plastic film. For this, a multi-blade sonotrode may be used, at least one of which is for welding and at least one for cutting or making a perforation (e.g., a continuous notch along which the pad 45 may later be separated from the surrounding material). Thus, in one step, the welding and the cutting / perforating of the pad can be done outside the weld.

In principle, the sonotrode can also have two or more blades only for welding, so that several parallel welds are produced at the same time.

In order to obtain an opening for easy inflation, it can be provided that at least one plastic film receives at least one punched out for each pad before or after the welding. By this punching the pad can be filled later by a device 55 which is arranged outside the cushioning plane, approximately above the cushioning level. 5

AT 414 232 B

The inflation is possible both in a complete punching (through all plastic films) as well as in a punched in only one plastic film.

Finally, it can be provided in the method according to the invention that only an open 5 weld is made, so the pad is not closed, so that it can be filled by the interruption of the weld. In this case, then a punching out of the contour of the pad would be provided so that it can be filled by this and by the interruption of the weld the pad. io If a closed weld is made, the punching must be placed inside the contour of the pad, preferably near the weld, so that it can be filled. After filling, the pad can be closed by dividing the area with the cut-out by another weld from the rest of the filled padding volume. 15

With the device or the method according to the invention, a fillable pad can be produced in which at least two layers of plastic films along a contour of the pad are welded together so that a fillable cavity is formed, wherein the weld is interrupted at a location for the purpose of filling , In this case, outside of the fillable cavity in the area of the interrupted point, an opening for filling the pad is provided tangentially to the contour of the pad in at least one plastic film.

This has the advantage that the gas passes through the arrangement of the opening near the interrupted point on a short path in the pad and at the same time the opening is closed to inflate by closing the weld 25 along the predetermined contour.

The upholstery produced according to the invention can be easily filled with a method according to the invention or a device according to the invention, as shown in claims 23 and 30, respectively. This is applicable both when the empty pads are already present as separate pads and also when the pads are present only in the form of the welds on a continuous band of at least two plastic films welded together. The latter has the advantage that the band can be transported more easily in the device for filling than individual pads. The invention provides that at least one nozzle is arranged at a distance from an opening, in particular a punched out, in one of the plastic films of the pad obliquely to the surface of the pad or to its support surface and gas is blown from this nozzle to the opening. In previous methods, the nozzle had to be introduced either into a specially prepared in one of the plastic films opening or introduced by an interruption of the weld between the plastic films, see for example WO 01/70593, Fig. 1, a specially formed by welds Fill opening 136 shows. The use of valves is also known from the prior art, see for example WO 98/23492. 45

With the method according to the invention no contact between nozzle and pad must now be made, so that the process of inserting the nozzle omitted and the filling can be done faster. In addition, the geometry of the nozzle can be kept simpler, since this does not have to be adapted to a specific shape of the filling opening. 50

The nozzle closes with the plane of the empty pad an angle between 5 ° and 60 °, preferably between 15 ° and 40 °, a.

In order to ensure in a simple manner that a defined amount of gas is contained in each pad, it can be provided that a predetermined amount of the nozzle is opened per opening

AT 414 232 B

Gas is blown out. This can be achieved, for example, by the fact that the gas in a storage container has a defined pressure and is supplied to the nozzle for a defined time. The pressure in a filled upholstery is usually below 1 bar overpressure, normally the overpressure in the upholstery is 0.2-0.6 bar. During inflation, an equilibrium is established, which depends on the nozzle geometry and the distance between the nozzle and the opening. Thus, for example, the compressed air network of an operation can be used, which normally provides a pressure of about 6 bar, wherein the pressure can be reduced by a pressure regulator to 2-3 bar, which has been found in practice to be beneficial for inflation. 10

Or a height sensor or a height limiter can be used, which measures the height of the inflated cushion and shuts off the gas supply when a certain value or the specified limit is reached. Furthermore, it can be provided that the pad is held stable at least two points during inflation. This can be done by two punches with a small support surface, each pressing on one side of the opening the pad about the edge of the film outside the weld against the surface and hold. 20 After inflation, the padding is closed by welding. Depending on where the opening for inflating has been arranged, this welding is carried out: if the opening is arranged outside the contour of the pad before a break in the weld, the interruption of the weld is closed following the welding of the contour of the pad. If the opening is within the contour of the pad, at least the opening is divided by the weld from the rest of the padding volume. This can be done by means of ultrasonic welding, but for the sake of simplicity, this welding can also be done thermally, for example in the form of a stamp that is pressed onto the pad for a certain period of time. Advantageously, it is provided that the point to be welded of the pad is depressurized during welding. For this purpose, a separate stamp can be provided, with which the area around the opening is pressed so that the gas in the cushion during welding and shortly thereafter (until after cooling) does not exert pressure on the opening. This can be done for example by a punch with a curved contour 35, which is pressed with the curvature to the filled pad on the existing on both sides of the opening welds.

If pads are to be inflated with different geometries, in which about the distance between the opening and interruption of the weld is different or 40 diameter of the opening, it may be necessary to pivot the nozzle, so to change the angle between the nozzle and cushion plane, and / or to change the distance of the nozzle to the cushion plane.

In order to achieve as parallel as possible, not too divergent jet to inflate, 45 has proven to be advantageous if the ratio of diameter of the nozzle at the gas outlet and distance of the nozzle to the opening of the pad is between 1: 3 and 1:10.

When inflating the pad, it should be noted that the pad and thus the openings stand out from the pad and thereby the distance to the nozzle is changed, so that the distance between a nozzle not moving during inflation relative to the pad from the pad level of the empty pad must be selected accordingly, so that the nozzle still has the optimum distance to the changed position of the opening during inflation. 55 If the position of the opening of the pad during inflation due to the Pols- 7

AT 414 232 B very large changes, it makes sense to make the nozzle movable, so that it can be pivoted both to change the angle between the nozzle and the plane of the empty pad, as well as in the sense of a translatory Movement can be moved to change the distance to the pad. 5

The invention will be explained with reference to the attached Figures 1 to 7, which illustrate the devices according to the invention by way of example and schematically, and the following descriptions. 1 and 2 show cushions according to the invention with partial cushions, which are connected by a band,

3 and 4 inventive cushion with partial pads, which are connected via another pad,

5 shows a confectioner,

FIG. 6 shows a blower, FIG. 15 shows a longitudinal section through a blower according to FIG. 6.

1 to 4, there is shown an article 19 to be packaged, here a multimedia device (e.g., VCR, DVD player, etc.) to which two pads of the present invention are attached. The article with the cushions can be packed in a box which is matched to the article with cushions with respect to the inside dimensions so that it is fixed in the box. In this case, several padded objects can be packed over and / or next to each other in a box.

In Fig. 1, the padded article 19 is shown obliquely from above in the upper view and obliquely from below in Fig. 25 of the lower illustration. The front of the article 19 is characterized by the buttons located thereon. The two pads 20, 21 each consist of two partial pads for the edges to be protected, hereinafter referred to briefly as edge pad 16. These edge pads are connected by a band 18 on each side. In the figures, the edge pads 16 are shown to illustrate their shape with contour lines 30.

The pad 21 protects with the one edge pad 16, the left rear vertical edge and the two left rear corners of the article 19, with the other edge pad 16, the right front vertical edge of the article 19 with the associated corners. The band 35 18 is guided over the top of the article 19. The pad 20 protects with the one

Edge pad 16, the left front vertical edge and the two left front corners of the article 19, with the other edge pad 16, the right rear vertical edge of the article 19 with the associated corners. The band 18 is guided over the underside of the article 19. 40

The tape consists of two layers of unwelded plastic film, so that the entire pad 20, 21 can be made of one piece of plastic film. However, it is also possible for the edge cushions 16 to be manufactured as independent individual cushions and to be connected to one side before or after inflation by a tape. 45

In Fig. 2, the padded article 19 is shown in the upper view from the front and in the lower view from above. Here it can be seen that the band 18 is stretched between the two edge pads 16 and does not rest on the article 19, so that by the tensioned tape a protective effect for the underlying surface (top or bottom of the article 19).

In Fig. 3, the padded article 19 is again shown obliquely from above in the upper illustration and obliquely from below. The two pads 30, 31 each consist of two edge pads 26, which are connected by a surface pad 17 on each side 55, wherein between surface pad 17 and the two edge pads. 8

AT 414 232 B 26 a flat, band-shaped region 27 is provided.

The surface pad 17 has an annular filled edge, which is adapted in the outer dimension of the shape of the article 19. In the interior, as in the case of the 5 edge cushions 16, 26, the plastic film is not cut along the contour of the cushion, but it is retained. In the recess 28 in the interior accessories for the article 19 can be transported, such as cables, operating instructions, remote controls. The plastic film acts as a protective layer between the accessories and the item 19. 10

Of course, the surface pad 17 can also be made inflatable over the entire surface, have several connected or separate chambers or also have a plurality of recesses 28 which can be adapted by their shape to the individual accessories, so embrace them approximately positively. 15

The pad 31 protects with the one edge pad 26, the left rear vertical edge and the two left rear corners of the article 19, with the other edge pad 26, the right front vertical edge of the article 19 with the associated corners. The surface pad 17 rests on the top of the article 19. The pad 30 protects with 20 one edge pad 26, the left front vertical edge and the two left front corners of the article 19, with the other edge pad 26, the right rear vertical edge of the article 19 with the associated corners. The associated surface pad 17 rests on the underside of the article 19. 25 The edge pads 26 have a constriction in the middle, so that the edge pads take the outer shape of an "8". The surface surrounded by the edge pad has a smaller width in the middle of the edge pad than at the ends, but the cross-sections of the annular pad in the middle of the edge pad are not smaller than at the top or bottom. 30

The band-shaped region 27 consists of two layers of non-welded plastic film, so that the entire pad 30, 31 can be made in one piece. But it can also be the edge pad 26 and the pad surface 17 are manufactured as independent pads and individually before or after inflation by a band connected to one side. 35

In Fig. 4, the padded article 19 is shown in the upper view from the front and in the lower view from above.

Of course, the embodiments in FIGS. 1, 2 on the one hand and FIGS. 3, 4 ande-40 on the other hand can be combined. Straight edge pad 16 can be combined with surface pads 17 to form a total cushion, constricted edge pad 26 can be connected to bands 18.

It should also be mentioned that the edge pads 16, 26 alone without connection Untereinan-45 can be plugged as protection on the edges of an object to be protected.

FIG. 5 shows a prefabricator according to the invention for producing welds along the desired contours of the pad. Welded seams 3 are produced by welding two plastic-fabric-webs 22, 23 wound on rolls by means of an ultrasonic welding device 4 (welding device for short), which has a sonotrode 5. The plastic films 22, 23 are supplied discontinuously by means not shown drives and guide rollers of the welding device 4, wherein at a first punch portal 24 openings 7 can be punched into the upper plastic film 22. If both Kunststofffo-55 lien 22, 23 are to be pierced, the first punch portal 24 does not function, but 9

AT 414 232 B, the punching is performed by a second punching portal 25.

The welding is carried out on a support surface 29, which should be flat, smooth and preferably not elastic, such as on a glass plate. The welding device 4 is arranged on a portal 2, which is movable in the same way as a plotter in all three spatial directions relative to the support surface 29, which is indicated by the double arrows. In this way, arbitrarily shaped welds 3 can be produced. In addition to the welding device 4, a motor 6 is arranged, which adjusts the sonotrode 5 about the axis normal to the welding plane, so that the sonotrode is always aligned tangentially to the contour. Once all the welds 3 on the width of the io plastic films 22, 23 are completed, they are transported on, usually by a pad length, so that when resting plastic film, the next pad can be made.

Since, in the example in FIG. 5, the openings 7 are located outside the contour of the upholstery 15, the weld seam 3 remains open for the subsequent filling of the upholstery.

The prefabricated plastic film 9 is then either rolled up or folded.

In Fig. 6, a blower according to the invention is shown, which serves to inflate vorkonfektio-20 ned empty pads. These are rotatably mounted as a roll 10 made of prefabricated plastic film 9 on the blower. In this example, two identical substantially rectangular ring cushions 1 with rounded corners are arranged next to each other over the width of the film, wherein the ensprechenden welds 3 for the sake of simplicity, only one half of the plastic film 9 are shown. Between the individual pads a perforation 15 is already provided, along which the pads can be separated from each other. The weld 3 has for each pad in the region of the opening 7 on an interruption, through which the pad can be inflated.

To close this interruption, a welding punch 11 is provided, which has a right-angular punch surface, with the interruption of the weld 3 can be closed by heat, the welding punch 11 from its rest position at a distance from the pad to the welding position, as in Fig. 6 shown, can be lowered. Before welding, however, the location to be welded must be depressurized with a further punch 12. It is therefore first the punch 12 is lowered from the dargestell-35 th resting position on the pad 1, then the welding punch 11, which is driven up again after welding, while the punch 12 is still pressed as long as the pad until the weld cooled and is resilient.

Both punches 11, 12 can be displaced and fixed on a bar 13 along the bar, so that the punches can be adjusted to different cushion geometries and film widths. It is also possible to arrange two or more punches 11, 12 and nozzles 8 on the bar 13, so that several cushions can be inflated simultaneously.

Thus, the pre-assembled plastic film 9 does not slip during inflation, 45 can be provided on the left and right of the stamp 11, 12 further stamp relative to the direction of the bar 13, the plastic film 9 in the region between the weld 3 and the perforation 15 left and Press the opening 7 on the right against the base.

In Fig. 7 is a longitudinal section through a blower of FIG. 6, wherein the section extends through the opening 7 and only the area around the punches 11 and 12 and the nozzle 8 is shown. The prefabricated plastic film 9 is transported by guide rollers 14 and advanced so far that the opening 7 of the pad comes to rest where the jet of the nozzle 8, whose gas supply line is not shown, impinges. When this point is reached, the plastic film 9 is stopped and gas is blown through the nozzle into the opening. The nozzle 55 has in this embodiment an angle with the cushioning plane, between

Claims (37)

10 AT 414 232 B 25 ° and 35 °. The opening 7 is provided at least in the form of a punched-out in the upper layer of the prefabricated plastic film 9, but the upholstery can also be inflated when both 5 layers of the plastic film 9 have been punched. The latter has the advantage that the opening 7 can be made only in the prefabricated plastic film 9, while otherwise the opening must be made in only one layer prior to assembly. If both layers of the plastic film have been punched 9, if necessary, when inflating a device to provide, which allows the separation of the two plastic films, so io about the lower plastic film holds, so that the upper can be lifted by the gas pressure. 1. Filler pad (20, 21, 30, 31) for protecting four corners, two edges and a surface of a substantially cuboidal, to be packaged article (19), wherein the pad of at least two layers of plastic films (22, 23), characterized in that the pad near its longitudinal ends in each case has a recess 20, by means of which the pad can be pushed onto at least one corner of the cuboid object (19), wherein the pad is dimensioned so that its longitudinal extent between the two recesses corresponds to the length of the two edges to be protected plus the length of the diagonal of the surface to be protected. 2. Upholstery according to claim 1, characterized in that the padding of several part cushion (16, 17, 26), in particular with separate chambers, consists. 3. Upholstery according to claim 1 or 2, characterized in that in each case a partial pad (16, 26) is provided for the edge to be protected, which has a recess, with which the partial pad can be plugged onto the edge to be protected. 4. Upholstery according to claim 3, characterized in that the two partial cushions (16) by a band (18) are interconnected. 5. Upholstery according to claim 3, characterized in that the two partial cushions (26) are interconnected by a further partial cushion (27). 6. Upholstery according to one of claims 3 to 5, characterized in that at least one partial pad (26) for an edge, the recess in the middle has a smaller width 40 than at the ends. 7. Upholstery according to one of claims 2 to 6, characterized in that a partial pad (27) has at least one recess which is adapted in shape to it to be included in other objects, such as accessories to the article (19). 45 8. Use of a pad (20, 21, 30, 31) according to any one of claims 1 to 7 for packaging a cuboid article (19), wherein a longitudinal end is pushed with the recess at least on a first corner of a first surface of the article, the Padding from the first corner along a first edge, diagonally across a second surface which faces the first surface, to one and along a second edge leading to the second corner, and the other longitudinal end with its recess at least a second corner, which is the first corner on the first surface diagonally opposite, is postponed. 9. A method for assembling fillable pads (1, 20, 21, 30, 31), in particular 1 1 AT 414 232 B luftbefüllbaren upholstery, in particular pads according to one of claims 1 to 7, wherein at least two layers of plastic films (22, 23) along a contour of the pad are welded to each other by means of ultrasound (4), that a fillable cavity is formed, characterized in that a sonotrode (5) with curved contours by 5 an axis normal to the welding plane is rotated so that the sonotrode tangent is aligned to the contour. 10. The method according to claim 9, characterized in that a sonotrode (5) for producing the weld along the contour of the pad, in particular spatially linear in three axes io, is moved. 11. The method according to claim 9 or 10, characterized in that the movement of the sonotrode (5) is controlled electronically due to any predetermined contour. 12. The method according to any one of claims 9 to 11, characterized in that the contact pressure with which the sonotrode (5) against the plastic films (22, 23) is pressed, is regulated. 13. The method according to any one of claims 9 to 12, characterized in that with the 20 sonotrode (5) a perforation (15) or a continuous cut in the plastic film (22, 23) is generated. 14. The method according to any one of claims 9 to 13, characterized in that before or after the welding at least one plastic film (22, 23) for each pad receives at least 25 a punched. 15. Apparatus for assembling fillable upholstery (1, 20, 21, 30, 31), in particular air-inflatable upholstery, comprising at least one ultrasonic welding device (4) for welding at least two layers of plastic films (22, 23) along a contour of the 30th Pad, characterized in that the sonotrode (5) is rotatable about an axis normal to the welding plane so that the sonotrode is tangentially aligned during welding to a curved contour. 16. The apparatus according to claim 15, characterized in that the sonotrode (5) of the ultra 35 sound welding device (4) is spatially movable linearly in three axes. 17. The apparatus of claim 15 or 16, characterized in that a device for electronic control of the movement of the sonotrode (5) is provided due to any predetermined contour. 40 18. Device according to one of claims 15 to 17, characterized in that a device for regulating the contact pressure with which the sonotrode (5) against the plastic films (22, 23) is pressed, is provided. 19. Device according to one of claims 15 to 18, characterized in that the So notrode (5) has a plurality of blades. 20. Device according to one of claims 15 to 19, characterized in that a punching device (24, 25) is provided, by which before or after the welding so at least one plastic film (22, 23) for each pad at least one punched-out (7) receives. 21. Use of a device according to one of claims 15 to 20 for the manufacture of fillable pads, in particular air-inflatable pads, which consist of two layers 55 of plastic films (22, 23). 12 AT 414 232 B 22. Filling (1, 20, 21, 30, 31) pad in which at least two plastic films (22, 23) along a contour of the pad are welded together so that a fillable cavity is formed, wherein the weld (3) in one place is interrupted for the purpose of filling, characterized in that outside the fillable cavity in the region 5 of the interrupted point tangentially to the contour of the pad in at least one plastic film (22, 23) an opening (7) is provided for filling the pad. 23. A method for filling empty upholstery of plastic films (22, 23) with gas, characterized in that at least one nozzle (8) at a distance from an opening (7), io in particular a punched, in one of the plastic films (22, 23) of the pad is arranged obliquely to the surface of the pad and from this nozzle gas is blown onto the opening. 24. The method according to claim 23, characterized in that the nozzle (8) with the plane 15 (29) of the empty pad an angle between 5 ° and 60 °, preferably between 15 ° and 40 °, includes. 25. The method according to claim 23 or 24, characterized in that per opening (7) a predetermined amount of gas is blown out. 20 26. The method according to any one of claims 23 to 25, characterized in that the pad is held stable during inflation at least two points. 27. The method according to any one of claims 23 to 26, characterized in that the pad 25 is closed by welding. 28. The method according to claim 27, characterized in that the point to be welded of the pad is depressurized during welding. 29. The method according to any one of claims 23 to 28, characterized in that the nozzle (8) is pivoted and / or the distance to the opening (7) is changed. 30. An apparatus for filling empty upholstery of plastic films with gas, characterized in that at least one nozzle (8) at a distance from a support surface 35 (29) for the empty cushion is arranged obliquely to the support surface, so that an opening Publ (7 ), in particular a punch, in one of the plastic films (22, 23) of the pad from this nozzle gas can be blown onto the opening. 31. The device according to claim 30, characterized in that the nozzle (8) with the Aufla- 40 gefläche (29) forms an angle between 5 ° and 60 °, preferably between 15 ° and 40 ° includes. 32. Apparatus according to claim 30 or 31, characterized in that a device is provided, with the per opening (7) a predetermined amount of gas to be blown 45 can. 33. Device according to one of claims 30 to 32, characterized in that a holding device is provided, with which the pad (1) can be stably held at least two points during inflation. 50 34. Device according to one of claims 30 to 33, characterized in that a welding device (11) is provided, with which the pad (1) can be closed after inflation. 35. Apparatus according to claim 34, characterized in that device (12) is provided with which the point of the pad (1) to be welded can be depressurized during welding. 36. Device according to one of claims 30 to 35, characterized in that the nozzle 5 (8) is pivotable and / or relative to the support surface (29) is movable. 37. Use of a device according to one of claims 30 to 36 for filling empty pads of plastic films (22, 23) with gas. 10 Including 6 sheets of drawings 15 20 25 30 35 40 45 50 55