Pressure box with modified riser

Abstract

The present invention relates to a pressure can (100) for dispensing a spray medium (102) and comprises a container (104) with a container wall (105) and a domed container bottom (103) for receiving the spray medium (102), a valve (101) for dispensing the spray medium when the valve is actuated, and a riser pipe (1) extending from the valve to the container bottom with a shell surface (6), a valve-side riser pipe opening (3) connected to the valve (101) and arranged on a first end face (2), and a container-side riser pipe opening (5) open towards the container and arranged on a second end face (4). The riser pipe (1) is designed to direct the spray medium from the container-side riser pipe opening (5) to the valve-side riser pipe opening, wherein the pipe (1) extends from the valve closer to the container bottom than to a container center point, and wherein the riser pipe (1) has at least one additional opening.To provide a pressure canister that can tolerate a greater variance in its use with regard to mechanical mixing, the at least one additional opening of the riser pipe (1) is designed to enlarge the cross-sectional area of ​​the riser pipe on the container side, independent of the filling volume of the pressure canister (100). The at least one additional opening is formed by a cut (8).

Description

[0001] The present invention relates to a pressurised can for dispensing a spraying agent.

[0002] Pressurized cans, such as aerosol cans, are regularly used to dispense a spraying agent. This agent, along with a propellant, is filled into the can's container and then dispensed via a valve. The use of dip tubes is common practice in this context, particularly to improve the spray pattern and ensure a consistent flow of the spraying agent to the valve.

[0003] The riser tube extends from the valve designed to dispense the spray agent into the container of the pressure can. By actuating the valve, the spray agent is transported from the container to the valve via the riser tube and dispensed through the valve, for example, sprayed onto a surface to be coated.

[0004] These types of aerosol cans can produce a homogeneous spray pattern, with the quality of the spray pattern improving the more thoroughly the propellant is mixed with the spray medium. This is typically achieved through mechanical mixing by shaking the can. Some manufacturers attempt to further enhance the movement by using mixing balls inside the can, which, through their own movement, can break down agglomerates or droplets.

[0005] This need for mechanical movement to homogenize the sprayed aerosol is all the more important the lower the fill level in the can is.

[0006] Considering the typical changes in a spray pattern over a longer period in this context, the decline in quality is easily explained: Firstly, the homogenization achieved through shaking occurs less frequently over time, allowing droplets and / or agglomerates to form again. Secondly, the fill level in the can decreases, which also promotes droplet and / or agglomerate formation. The formation of layers of different densities within the pressurized can over time is also known as gradient formation. This means that the heavier components, richer in pigment and propellant, sink in the direction of gravity, while the lighter components accumulate above them. This settling can lead to the formation of a layer rich in solids, particularly in the middle of the can during prolonged application.Since the product is transported from the lower part of the can during application, this can lead to significant disruptions in the spray pattern, even resulting in spitting. The user will perceive this as a deterioration in spray performance and will therefore discontinue using the can. The unused portion of the can's contents thus becomes a residue, increasing waste. It is therefore essential to maintain the most consistent aerosol formation possible for as long as possible.

[0007] In practice, it is therefore repeatedly shown that the consumer does not fully utilize the contents of the can, as this requires a longer period of mechanical movement in the form of shaking when the fill level is low, which either does not occur for a sufficient length of time or even not at all after the first use.

[0008] To make matters worse, the required time is also difficult to estimate, as it depends on the intensity of the movements in the form of the amplitude, the force applied and other factors.

[0009] The object of the present invention is therefore to provide a pressurized can in which a greater variance in the use of the can with regard to mechanical mixing can be tolerated without negatively affecting the application of the aerosol. This relates equally to a more consistent spray pattern and the ecologically important aspect of complete utilization of the can's contents. Furthermore, the object of the present invention is to ensure improved emptying of the pressurized can while maintaining a high-quality spray pattern.

[0010] The problem is solved using the features of a pressure can according to claim 1.

[0011] Accordingly, a pressurized spray can comprises a container, a valve, and a dip tube. The container serves to hold the spray and has a container wall and a domed base, i.e., a base that projects into an interior volume formed by the container wall. The container can have a substantially cylindrical shape, with the base and the container wall connected by crimping. Furthermore, the container wall can also include a dome, which is likewise connected to the container wall opposite the base by crimping. The valve can be located on the side of the container opposite the base and closes the container wall there. The valve can, for example, connect to the dome.

[0012] Once the pressure can according to the invention is filled with a spray medium and sealed, the spray medium can be dispensed by actuating a valve. For this purpose, a spray head can be attached to the valve, whereby the valve is actuated by means of the spray head, e.g. by pressing on the spray head, the valve opens and the pressurized spray medium is dispensed.

[0013] Furthermore, the pressure capsule includes a riser pipe that extends from the valve to the bottom of the container. The riser pipe has a cylindrical surface and two openings at each end. The riser pipe can, for example, have the shape of a hollow cylinder. It is not necessarily a rigid pipe, but can also be designed as a type of hose. Furthermore, the riser pipe can deviate from the shape of a hollow cylinder and, for example, be beveled or chamfered in the area of ​​the opening on the container side.

[0014] The riser pipe is connected to the valve via one of its openings. This opening is located on a first end face of the riser pipe and forms a valve-side riser pipe opening. The other riser pipe opening, located on a second end face, projects into the container and consequently forms a container-side riser pipe opening. The container-side riser pipe opening can extend into the filling volume formed by the container, and the riser pipe is designed to direct the spray medium from the container-side riser pipe opening to the valve-side riser pipe opening. In other words, a pressurized spray medium can be directed through the container-side riser pipe opening to the valve-side riser pipe opening by actuating the valve accordingly, and exit the valve there, for example, through the spray head.

[0015] The riser pipe extends from the valve closer to the bottom of the container than to the container's center point. The container's center point is defined here as a point within the container that is centrally located with respect to a longitudinal extension of the container; that is, a point that is centered along a longitudinal distance between the valve and the bottom of the container. In other words, the container's center point is defined as a point within the container that is centrally located with respect to a longitudinal extension of the container parallel to the container wall, where the riser pipe is longer than the distance measured from the valve to this point, i.e., to the container's center point. More precisely, the riser pipe extends from the valve closer to the bottom of the container than to the container's center point.

[0016] Consequently, the container-side riser pipe opening of the riser pipe is located closer to the bottom of the container than to the center of the container. In In other words, the distance from the container-side riser pipe opening to the container bottom is less than the distance to the container center. Preferably, the riser pipe is designed such that, if a spray medium sump forms at the container bottom, as described above (i.e., if spray medium settles at the container bottom, for example, due to the storage of the pressure can), the riser pipe extends into this spray medium sump.

[0017] In addition to the tank-side opening, the riser pipe has at least one further opening designed to increase the cross-sectional area of ​​the riser pipe on the tank side, independent of the pressure vessel's filling volume. This means that the at least one additional opening is designed to increase the cross-sectional area of ​​the riser pipe on the tank side, which, without this additional opening, would always be formed solely by the tank-side opening located on the second end face of the riser pipe. Consequently, the at least one additional opening can increase the cross-sectional area of ​​the riser pipe compared to a riser pipe with only one tank-side opening.

[0018] The cross-sectional area of ​​the riser pipe on the container side can therefore be formed not only by the opening of the riser pipe itself, but also by an enlarged opening formed from the opening of the riser pipe as the opening of the hollow cylinder forming the riser pipe and at least one additional opening. In other words, the opening according to the invention can be not only an opening in the wall of the riser pipe, but can also be designed as an enlargement of the opening cross-section.

[0019] In this context, the possibility of increasing the cross-sectional area of ​​the riser pipe opening on the container side is independent of the pressure vessel's filling volume. Therefore, the cross-sectional area of ​​the riser pipe opening on the container side can increase due to at least one additional opening, whether the pressure vessel is completely full or only half full, a quarter full, or otherwise full.

[0020] The opening cross-section can be fixed. Preferably, however, the opening cross-section is variable. For example, the container-side opening cross-section of the riser pipe can be variable such that, in the case of a pressurized can containing a spray medium, it increases when the valve is actuated—for example, due to the resulting flow of the spray medium from the container through the riser pipe to the valve—and then decreases again after the valve is actuated. Similarly, the opening cross-section can be variable depending on the pressurized spray medium. However, the container-side opening cross-section of the riser pipe can also be fixed, i.e., its size can remain constant regardless of whether the valve is actuated.

[0021] In summary, the cross-sectional area of ​​the riser pipe opening on the container side can be the sum of the cross-sectional area of ​​the riser pipe opening on the container side and the cross-sectional area of ​​at least one additional opening. However, alternatively or additionally, in the case of a pressure can filled with a pressurized spraying agent, the at least one additional opening can also only form and / or enlarge when the valve is actuated.

[0022] The at least one additional opening is formed by a cut. This cut can be located partially in the outer surface and partially in the second end face of the riser pipe. Consequently, the at least one additional opening can also be formed by a cut in the outer surface of the riser pipe. Besides improved spray application, the specific design of the at least one additional opening also offers advantages in manufacturing.

[0023] Enlarging the cross-sectional area of ​​the container's opening allows the canister to be emptied as completely as possible, even with minimal shaking by the user. Depending on the specific design of the riser tube, it can even extend into the spray solution reservoir without clogging or becoming blocked, thus ensuring the canister's continued functionality. Tests have shown that the solution according to the invention allows for 5% to 10% more spray solution to be dispensed from a single canister. Surprisingly, it was also found that the inventive design of the riser tube results in a more constant volume of spray solution across the canister's fill level, thus improving the spray pattern.Furthermore, it must be noted that the modifications made to the riser pipe are minimal and do not require any additional components or complex manufacturing steps. Consequently, the inventive design of the riser pipe of a pressure can not only improves the function of the pressure can, but also creates an economically worthwhile improvement.

[0024] According to another embodiment, the at least one additional opening can be arranged in the outer surface of the riser pipe. In other words, the riser pipe then comprises at least one additional opening arranged in the outer surface of the riser pipe and a container-side riser pipe opening arranged in the second end face of the riser pipe. Together, the openings—that is, the at least one additional opening and the container-side riser pipe opening—form the container-side opening cross-section of the riser pipe and enable optimized application of the spray agent. Depending on the design of the riser pipe, it may be advantageous if the opening cross-section of the at least one additional opening is arranged substantially at a right angle to the opening cross-section of the container-side riser pipe opening arranged in the second end face of the riser pipe.It can also be advantageous if the at least one additional opening on the outer surface of the riser tube is arranged such that, when the pressure can is filled, it is located partially above a layer of spray compound that would form during storage. The riser tube opening on the container side, located on the second end face of the riser tube, is immersed in the maximum amount of spray compound that would accumulate. A "maximum amount of spray compound" is defined as the maximum quantity of spray compound that would form at the bottom of the container if the pressure can were stored completely filled with spray compound.The specific design of the pressure can, wherein at least one additional opening is arranged on the outer surface of the riser pipe, can consequently increase the container-side opening cross-section independently of the filling volume of the pressure can; however, in this design, this is achieved through two separate openings.

[0025] According to a further embodiment, the at least one additional opening can be arranged at least partially in the outer surface and the second end face of the riser pipe. In other words, the at least one additional opening is not only located entirely within the outer surface of the riser pipe, but also extends into the second end face of the riser pipe. The cross-sectional area of ​​the riser pipe opening on the container side can seamlessly transition into the cross-sectional area of ​​the at least one additional opening. That is, the two opening cross-sections can merge into one another and together form an enlarged opening cross-section. The arrangement of the at least one additional opening in the area of ​​the second end face of the riser pipe not only improves the application of the spray agent, but also allows for easy access, so that the at least one additional opening can be precisely positioned within the riser pipe.

[0026] When the valve of the pressure can is actuated with a pressurized spray medium, the spray medium flow can widen the incision, thereby increasing the cross-sectional area of ​​the riser pipe opening on the container side. This additional opening may only become clearly visible when a spray medium is dispensed, due to the widening. However, the riser pipe can also widen independently of valve actuation, solely due to the incision. This additional opening, i.e., the incision, can then widen further when the valve of the pressure can is actuated.

[0027] According to a further embodiment, the riser pipe can have at least two additional openings. Preferably, any two of the at least two additional openings are arranged diametrically opposite each other, at least partially. In other words, the riser pipe can, for example, have two diametrically opposed incisions, each of which is located at least partially in the outer surface and the second end face of the riser pipe. Preferably, the riser pipe has exactly two additional openings. However, the riser pipe can also have, for example, only one additional opening, three additional openings, or four additional openings. Any other number of additional openings is also possible.Tests have shown that an optimal ratio between spray rate and residual emptying is achieved when exactly two diametrically opposed incisions are used. While it was also observed that residual emptying can be greater with only one incision in the riser pipe, a greater temporal invariance in the spray rate was simultaneously noted.

[0028] According to another aspect, the riser pipe, as mentioned previously, can have more than two additional openings. In this case, it is preferred that the angle between two adjacent additional openings, measured in the circumferential direction of the riser pipe, is at least 90°. For example, the riser pipe can have three additional openings, each located at least partially in the outer surface and the second end face of the riser pipe, with the angle between any two adjacent openings being 120°. Similarly, the riser pipe can, for example, have four openings, each offset by 90° in the circumferential direction of the riser pipe. Sufficient spacing between adjacent openings can promote the expansion of the riser pipe and thus lead to improved application of the spray.

[0029] According to a further aspect of the invention, the at least one additional opening can extend along the riser pipe from the container-side riser pipe opening to the valve-side riser pipe opening over a length of less than 40 mm, preferably over a length between 5 mm and 30 mm, most preferably over a length of 15 mm. In the case of a circular opening, the length of the at least one additional opening would consequently correspond to the diameter of the additional opening. The at least one additional opening, in the form of a notch, can, for example, extend from the second end face of the riser pipe towards the direction of the valve-side riser pipe opening. That is, the riser pipe can, for example, be longitudinally notched at the container-side riser pipe opening. An additional opening on the riser pipe designed according to the specified lengths further optimizes the application of the spray agent.

[0030] According to one embodiment, the length of the at least one additional opening can have a ratio of at least 1 to 33 to the total length of the riser pipe. Preferably, the ratio is a maximum of 1 to 5. A ratio between 1 to 10 and 1 to 11 is preferred. With a highly preferred length of 15 mm for the at least one additional opening and a preferred ratio between 1 to 10 and 1 to 11, this would mean that the total length of the riser pipe is between 150 mm and 165 mm. It can thus be stated that the length of the at least one additional opening is relatively small in relation to the total length of the riser pipe and yet has a decisive effect on the improved spray application.

[0031] According to a further embodiment of the present invention, the riser pipe can have a total length between 145 mm and 170 mm. Preferably, the riser pipe has a total length of 155 mm. The total length of the riser pipe is defined by the shortest path measured along the outer surface of the riser pipe between the first end face and the second end face. Furthermore, the riser pipe can have an outer diameter between 1 mm and 7 mm, preferably between 3 mm and 6 mm. Most preferably, the riser pipe has an outer diameter of 4 mm.

[0032] Preferably, the aforementioned length ratios and dimensions, i.e., the overall length of the riser tube, the outer diameter of the riser tube, and the length of at least one additional opening, relate to a pressure can with a nominal filling volume of 400 ml. However, according to one aspect of the invention, the invention can also be used for pressure cans with a filling volume of 50 ml to 1000 ml, preferably from 150 ml to 600 ml. Preferably, a necked-in or straight 400 ml pressure can is used. According to another aspect of the invention, the pressure can can have a nominal filling volume according to EN 15007:2006 (D).

[0033] In another embodiment, the riser pipe can be made of a material that is at least partially flexible. Preferably, the riser pipe can be made of an elastic, flexible material such as polypropylene or polyethylene. This allows the riser pipe opening on the container side to fan out or widen particularly easily during the application of a spray. This means that the at least one additional riser pipe opening can widen, for example, during the application of the spray, with the widening forming, for example, a kind of funnel on the riser pipe in the area of ​​the second end face. However, the riser pipe can also widen or fan out simply by introducing an additional opening, for example, a slit, independently of the application of the spray.In an arrangement, for example, two additional openings can be positioned opposite each other. For instance, the riser pipe can be cut at opposite points. An opposing arrangement of at least two additional openings can, however, promote a symmetrical fanning out of the container-side riser pipe opening. For example, the segments of the riser pipe's outer surface, partially separated by the two cuts, can fold outwards when the pressure can's valve is actuated. The extent or degree of fanning of the at least one additional opening can decrease continuously due to the pressure drop within the can during application, whereby the riser pipe, initially fanned out in the area of ​​the container-side riser pipe opening, can gradually contract during continuous application of the spray agent.By fanning out the riser pipe, both the spray pattern can be improved and the emptying of the pressure can optimized.

[0034] According to one embodiment, the riser pipe can have at least one circular opening arranged in its outer surface. From one perspective, this circular opening can improve the application of the spraying agent. That is, the application, which is improved, for example, by the fanning out of the riser pipe during application and the resulting increase in the cross-sectional area of ​​the opening on the container side of the riser pipe (since this prevents clogging of the riser pipe even when it is immersed in the spraying agent reservoir and simultaneously ensures the application of the spraying agent), can be further optimized by the circular opening.

[0035] Furthermore, in one embodiment, the circular opening can be positioned between 1.5 cm and 2 cm above a vertex of the concave container base. The vertex defines a point on the container base that is closest to the valve. In one embodiment, the concave container base of the pressure can can form a dome-like shape. In cross-section, the container base can thus have a semi-ellipse shape in certain areas, with the vertex of the container base being the point on the base closest to the center of the container. The relative arrangement of the circular opening on the outer surface of the riser tube allows the riser tube, with its container-side opening, to extend into a sump of spray material, and at least one additional opening can be positioned above this sump.Consequently, for example, an aerosol located above the spray concentrate sump can be drawn into the riser pipe through at least one additional opening. Due to the resulting suction effect, spray concentrate from the sump can be drawn into the riser pipe via the container-side opening, carried along, and dispensed from the valve. This ensures more complete emptying of the pressure can. However, a round opening can also be located at the valve-side end of the riser pipe and / or designed in such a way that its effect on the spray concentrate dispensing is barely perceptible.

[0036] In another embodiment, the pressure can can be filled with a propellant and a filler material. The propellant can be in liquid and / or gaseous form. Furthermore, the filler material can comprise at least one paint binder, preferably a curable paint binder. In addition, the filler material can, for example, comprise a solvent. When the valve is actuated, the propellant can thus, for example, guide the paint binder via the riser tube to the valve and dispense it, for example, via a spray nozzle. In other words, the spray medium can be formed at least by the propellant and the filler material.

[0037] Furthermore, according to one embodiment, the fill material in the pressurized can can consist of binders and / or pigments and / or solvents, for example, water. Such fill materials are also referred to as spray paints. Water-based paints also utilize water as a solvent. Preferably, when filling the pressurized can, the fill material has a viscosity of 20 to 50 seconds in a 3 mm discharge cup, measured at room temperature of 20°C. The use of paints with a higher solids content, as well as paints with a higher density, as the fill material allows for particularly good utilization of the advantages of the invention. According to an alternative or supplementary aspect of the invention, the fill material has a solids content of between 15% and 60%, preferably between 20% and 50%, and most preferably between 25% and 35%. According to another alternative or supplementary aspect of the invention, the fill material has a density of between 0.8 g / l and 3 g / l.The riser pipe according to the invention thus makes it possible in particular to use filling material with a comparatively high density.

[0038] According to a further aspect of the present invention, the container wall and the container bottom can jointly form a fold. The fold can define the point on the container bottom where the container wall and the container bottom are clinched. Furthermore, the container-side riser pipe opening can be arranged in an area between the fold and the apex of the container bottom. This allows the riser pipe, or the container-side riser pipe opening, to immerse itself in the spray medium sump even with a small amount of spray medium present at the lowest point of the container, i.e., in the area of ​​the fold. Consequently, this can further optimize the application of the spray medium and achieve more complete emptying of the pressure can. According to a preferred aspect of the invention, the riser pipe extends right up to the fold.The second end face of the riser pipe is particularly likely to touch the fold in certain areas.

[0039] In a further embodiment, a two-component system, in particular a two-component system for two-component sealing foams, two-component adhesives, or two-component coatings, can be arranged at least partially within the container. The two-component system can include an inner sleeve with a release mechanism. Furthermore, the release mechanism can be configured to permanently open the inner sleeve towards the container. This means that the inner sleeve can be opened in such a way that a component contained within the inner sleeve spreads into the interior of the container after the inner sleeve has been opened.Consequently, the 2K component system can, for example, be configured to form a multi-component product, such as a multi-component paint, together with a spray medium already contained in the aerosol can when the trigger mechanism is activated. By actuating the trigger mechanism, the spray medium reacts with the component of the 2K component system to form a finished end product. After the reaction, the spray medium, i.e., the multi-component spray medium, can be dispensed via the dip tube and the valve. The component present in the inner sleeve that reacts with the spray medium can be relatively small in quantity compared to the spray medium itself. This component can, for example, influence the curing and quality of the spray medium, such as accelerating the curing process and / or increasing its strength.The reaction initiated by the triggering mechanism can lead to a particularly rapid formation of a spray medium sediment, which is why the present invention is especially optimized for 2K component systems. In other words, the reacted spray medium of a 2K component system tends to settle at the bottom of the container to a particularly high degree, i.e., to sediment formation, which is why the solution according to the invention is particularly well suited for pressurized cans with a 2K component system.

[0040] According to a further aspect of the present invention, the inner sleeve can be arranged on a plate, in particular a base plate, and, as part of the release mechanism, comprise a plunger arranged in the inner sleeve for bursting open the inner sleeve. Furthermore, the plunger can be actuated through the plate, the inner sleeve being connected to the plate via a spring basket. The spring basket can also contain a spring-mounted release mechanism, the end of which, facing the bottom of the container, is guided through the plate and acts on the plunger. The plunger can also act against a diaphragm arranged at the valve-side end of the inner sleeve, the diaphragm being able to hermetically seal the inner sleeve at its valve-side end against the contents of the pressure can. When the release mechanism is actuated by the plunger, the diaphragm can be torn open.Furthermore, the spring basket can be designed to be closed on the valve side, and the trigger can be provided on the bottom side with a sealing element acting against the inner wall of the spring basket. Such a triggering mechanism is known, for example, from EP 2 114 795 A1. By arranging the inner sleeve on a plate, the component stored within the inner sleeve can, in particular, be deployed above the apex of the container bottom, so that a reaction preferably takes place above the riser pipe opening on the container side.

[0041] In particular, the arrangement of the two-component system at the bottom of the container and within the container reduces the container volume and the surface area available for the spray agent to settle. Furthermore, the amount of spray agent increases after activation of the two-component system, typically resulting in a larger quantity of spray agent accumulating or settling at the bottom of the container. Due to the reaction between the contents and the components of the two-component system, the spray agent also has a greater tendency to clog the riser tube or the riser tube opening on the container side. Consequently, the design according to the invention is particularly suitable and advantageous for pressurized cans with a two-component system.

[0042] Accordingly, the pressurized can, as described above, can also be used for liquid two-component systems, in particular two-component sealing foams, two-component adhesives, or two-component coatings. The pressurized can can be designed to be used with or without an actuating aid. When using the pressurized can with an actuating aid, the aid can be attached to the can. The actuating aid can serve as a spraying aid, which may only require actuation of the pressurized can and / or guidance of the spray mist, but not the conveyance of the spray material exiting the pressurized can, for example, by air pressure. Such conveyance of material, as is known, for example, from the use of HVLP spray guns, is not necessary here, since the pressurized can typically contains a propellant.In other words, the pressure can can be used with a simple actuation aid that serves solely to actuate the spray head without affecting the atomization or spray pattern.

[0043] Further embodiments of the invention are shown in the example and the figures with their accompanying descriptions. Each feature, individually and in any combination, is considered disclosed. Some of the illustrations are slightly simplified and schematic.

[0044] They show: Fig. 1A : a perspective view of a riser pipe according to the invention with a cutout; Fig. 1B : a perspective view of a riser pipe according to the invention with two diametrically opposed incisions and a round opening; Fig. 1C : a perspective view of a riser pipe according to the invention with a cut and an opposing round opening; Fig. 2: a schematic cross-section of a lower area of ​​a pressure can with a riser pipe according to Fig. 1C ; Fig. 3 : a schematic cross-section of a pressure can with a 2K component system; Fig. 4A : a top view of a second end face of a riser pipe with an additional opening; Fig. 4B : a top view of a second end face of a riser pipe with two diametrically opposed additional openings; Fig. 4C : a top view of an exemplary second end face of a riser pipe with three additional openings; Fig. 4D : a top view of another exemplary second end face of a riser pipe with three additional openings; and Fig. 4E : a top view of a second end face of a riser pipe with four additional openings, two of which are arranged diametrically opposite each other.

[0045] In the following figures, identical elements and components as well as identical elements and components in different examples or embodiments, i.e., elements and components that act identically or are intended for the same purposes but belong to different examples, are provided with the same reference numerals.

[0046] Figure 1A shows a riser pipe 1, which is in a pressure can 100, for example in the one in Figure 3 The pressure can 100 shown is usable. Although, as described below, the pressure can 100 in Figure 3 Although a 2K component system is included, this is not strictly necessary for the invention. The riser pipe 2 in Figure 1A It has a first end face 2 with a valve-side riser pipe opening 3. The valve-side riser pipe opening 3 can be, for example, in Figure 3shown, to be connected to a valve 101. On the side of the riser pipe 1 opposite the first end face 2, i.e., on a second end face 4 of the riser pipe 1, the riser pipe 1 has a tank-side riser pipe opening 5.

[0047] Between the two end faces 2 and 4 of the riser pipe 1, the riser pipe 1 is formed by its outer surface 6 and extends with a total length L1. In the area of ​​the second end face 4, the riser pipe 1 also has an additional opening in the form of a cut 8. The cut 8 extends from the outer surface 6 into the opening 5 on the container side. The cut 8 shown here thus extends over a length L7 to the second end face 4 of the riser pipe 1. The transition between the opening cross-sections of the cut 8 and the container-side riser pipe opening 5 is therefore seamless. Furthermore, the riser pipe 1, in the form shown, is essentially designed in the form of a hollow cylinder.

[0048] As soon as the valve 101 of the pressure can 100 is actuated, a spray medium 102 can flow into the riser pipe 1 through the container-side riser pipe opening 5 and the, for example, fanning or widening notch 8. The cut edges forming the notch 8 can be in contact before the spray medium is dispensed, as shown here. Due to the pressurized spray medium 102 and the weakening of the material caused by the notch 8, the riser pipe 1 then widens in the area of ​​the container-side riser pipe opening 3; that is, the riser pipe 1, or the container-side riser pipe opening 5 and the notch 8, are widened during the dispensing of the spray medium 102.

[0049] From one perspective, the widening of the incision can also occur simply through the creation of the incision 8. In other words, after the incision 8 is created, the riser pipe 1 may already be widened and then widen further, for example, during the application of the spray agent 102. Regardless, the riser pipe 1 then directs the spray agent 102 to the valve-side riser pipe opening 3.

[0050] In a Figure 1B In the illustrated alternative embodiment of a riser pipe 1, the riser pipe 1 has two additional openings, both of which are in the form of a notch 8 and arranged diametrically opposite each other. As shown by the dashed arrows, this allows the container-side riser pipe opening 5 to fan out very wide during the application of the spray agent 102.

[0051] The opposing incisions 8 can be simultaneously made in the second end face 4 of the riser pipe 1 in a single manufacturing step. An exemplary top view of a second end face 4 of a corresponding riser pipe 1 is shown, for example, in Figure 4B shown.

[0052] Although in the Figures 4A to 4E The incisions 8, depicted as slits, are, for example, simply made by a cutting tool in the second end face 4 of the riser pipe 1, and the resulting cut edges may touch or at least be substantially in contact with each other. The representation as a slit thus serves only for improved illustration.

[0053] The in Figure 4A to 4EThe second end faces 4 of a riser pipe 1 shown thus illustrate alternative possibilities for the arrangement of cuts 8 on the riser pipe 1. The cuts 8 can each be arranged as, for example, in Figure 1B shown, extending along the lateral surface 6 in the direction of the first end face 3. Figure 4A This shows a riser pipe 1 with only one incision 8. Figure 4B Figure 1 shows an embodiment of a riser pipe 1 with two incisions 8 which are arranged diametrically opposite each other. Figure 4C Figure 1 shows an exemplary riser pipe 1 with three incisions 8 arranged in a T-shape. Additionally, in Figure 4C An angle α is shown, plotted in the circumferential direction of the riser pipe. The circumferential direction is illustrated by an arrow. In this case, the angle α is 90°. The angle between the subsequent circumferential incisions 8 is 180°. Figure 4DAn alternative arrangement of three incisions 8 on a second end face 4 of a riser pipe 1 is shown. Figure 4C The incisions 8 are arranged in a Y-shape. The angle α between any two adjacent incisions 8 is 120°. Another alternative embodiment of a riser pipe 1 is described in Figure 4E The figure shows four incisions 8 arranged in the second end face 4 of the riser pipe. Two of the incisions 8 are arranged diametrically opposite each other, so that the angle α between any two adjacent incisions 8 is 90°.

[0054] The in the Figures 4A to 4E The possible arrangements of cuts shown in Figure 8 are merely examples. Alternative arrangements are also conceivable. For example, five cuts could be arranged on a riser pipe, etc.

[0055] The in Figure 1BThe riser pipe 1 shown has, in addition to the incisions 8, a round opening 9, which is located closer to the first end face 3 of the riser pipe 1 than to the second end face 4.

[0056] The riser tube 1 can, for example, be made of a plastic that gives it the flexibility advantageous for fanning or expanding. The dashed arrows indicate the fanning movements of the outer surface segments separated from one another by the incisions 8. In the riser tube 1 shown here, the outer surface segments essentially fold away from a longitudinal axis of the riser tube 1 in certain areas.

[0057] The application of the spray agent 102 can be triggered by actuating the valve 101 of the pressure can 100, whereby, for example, pressure is exerted on a spray head (not shown) in the direction of a container bottom 103 to actuate the valve 101, causing the valve 101 to open and the pressurized spray agent 102 to flow out via the riser pipe 1 and the valve 101.

[0058] Another example of a riser pipe 1 according to the invention is shown in Figure 1C The riser pipe 1 shown here has, instead of a second additional opening in the form of a cutout 8 ( Figure 1B) a round opening 9 opposite one of the incisions 8. However, tests have shown that, as mentioned previously, when the riser pipe 1 is cut, especially when cut with two opposing incisions 8, the riser pipe 1 fans out as a result of the cutting process, regardless of whether spray medium 1 is applied. This means that the sections of the riser pipe 1 separated by the incisions 8 are further apart in an area closer to the end face 4 of the riser pipe than in an area further away from the end face 4 of the riser pipe 1. Nevertheless, when the valve 1 is actuated, the incisions 8 can widen further, or the container-side opening 5 of the riser pipe can fan out further. The incisions 8 thus also form an additional opening that increases the container-side opening cross-section of the riser pipe 1.

[0059] Although not shown, a riser pipe could also have other configurations, at least one additional opening on the riser pipe 1, wherein the additional opening increases the container-side opening cross-section in addition to the cut.

[0060] In the Figure 2 In the illustrated embodiment, only a circular opening 9 is visible; however, opposite the circular opening 9, there is also a non-visible incision 8, comparable to the one in Figure 1C The illustrated design is arranged as follows. The round opening 9 is circular in shape. Furthermore, in Figure 2The lower part of a container 104 is shown, comprising a concave container base 103 and a container wall 105. The lower part of the container 104 is the lower section of a pressure can, with only the upper section of the pressure can omitted. The upper section of the pressure can would contain, in particular, a valve for dispensing the spray agent. Together, the container base 103 and the container wall 105 of the container 104 form a fold 106. Furthermore, the concave container base 103 has a vertex 107. This vertex 108 is the point on the container base 103 that is closest to the valve 101 (not shown here).

[0061] The spray agent 102 has been in Figure 2The spray medium 102 settles at the bottom of the container 103, forming a so-called spray sump. A mixing ball 108, which can be used to mix the spray medium 102, is located in this sump. The riser pipe 1 also extends into the spray sump, such that the container-side riser pipe opening 5 is located in an area between the fold 106 and the apex 107 of the concave container bottom 103. The circular opening 9 of the riser pipe 1 is located above the apex 107 of the container bottom 103. A length L9 determines the vertical distance between the apex 107 and the circular opening 9; preferably, the length L9 is between 1.5 cm and 2 cm.

[0062] Due to the chosen arrangement in Figure 2 The round opening 9 is also located above the deposited spray medium 102, which allows for particularly good application of the spray medium 102 via the riser pipe 1.

[0063] Furthermore, in Figure 3An exemplary pressure can 100 with a 2K component system is shown. However, the presence of a 2K component system is not essential for the invention. The pressure can 100 in Figure 3 The system comprises a riser pipe 1, which includes an additional opening in the form of a cutout 8. The riser pipe 1 is arranged within a container, which here is formed in particular by the container wall 105, a domed container bottom 103, and a dome 109. Here, too, the riser pipe 1 projects into an area between the apex (not shown) of the container bottom 103 and the fold 106. The container extends longitudinally from the container bottom 103 to the dome 109.

[0064] The 2K component system also includes an inner sleeve 110, a plate 11, a plunger 112, a diaphragm 113, a component 114, and a sealing element 115. Actuation of the trigger mechanism causes the plunger 112 to break or rupture the diaphragm 113 from the inner sleeve 110, allowing the component 114 to mix and react with the spray medium 102. The resulting spray medium, for example, a multi-component paint, can then be dispensed from the pressure can 100 by actuating the valve 101. The actuation of the trigger mechanism is indicated by a small arrow, which shows the direction of movement or actuation of the trigger mechanism required for activation.

[0065] For a detailed description of the 2K component system presented here, which in particular also discloses a spring basket, reference is made to EP 2 114 795 A1, the disclosure content of which is expressly included.

[0066] The reacted spray medium 102 of a 2K component system tends to settle at the bottom of the container to a particularly high degree, i.e., to form a sludge, which is why the solution according to the invention is particularly well suited for pressure cans 100 with a 2K component system.

[0067] Consequently, the solution according to the invention, which essentially relates to the optimization of the riser tube 1 of a pressure can, can improve the dispensing of a spraying agent, thereby enabling more complete emptying of the pressure can. At the same time, it was surprisingly found that, due to the inventive design of the riser tube 1, the dispensed volume of the spraying agent remains more constant over the course of the pressure can's fill level, thus enabling an improved spray pattern. Reference symbol list

[0068] 1 Riser pipe 2 First end face 3 Valve-side riser pipe opening 4 Second end face 5 Tank-side riser pipe opening 6 Shell surface 8 Cut (as an additional opening) 9 Round opening 100 Pressure can 101 Valve 102 Spray medium 103 Container bottom 104 Container 105 Container wall 106 Fold 107 Apex 108 Mixing ball 109 Dome 110 Inner sleeve 111 Plate 112 Plunger 113 Membrane 114 Component 115 Sealing element L1 Total length (of the riser pipe) L7 Length (of an additional opening) L9 Distance (between the apex and the round opening) α Angle (between two adjacent additional openings)

Claims

1. Pressure can (100) for dispensing a spray agent (102), the pressure can (100) comprising: a container (104) with a container wall (105) and a domed container bottom (103) for receiving the spray agent (102), a valve (101) for dispensing the spray agent (102) when the valve (101) is actuated, and a riser pipe (1) extending from the valve (101) to the container bottom (103) with a shell surface (6), a valve-side riser pipe opening (3) connected to the valve (101) and arranged at a first end face (2), and a container-side riser pipe opening (5) open towards the container (104) and arranged at a second end face (4), wherein the riser pipe (1) is configured to deliver the spray agent (102) from the container-side riser pipe opening (5) to the valve-side riser pipe opening (3). to direct, wherein the riser pipe (1) extends from the valve (101) closer to the bottom of the container (103) than to a center point of the container,and wherein the riser pipe (1) has at least one additional opening, wherein the at least one additional opening of the riser pipe (1) is configured to increase a container-side opening cross-section of the riser pipe (1) independently of a filling volume of the pressure can (100), , characterized by the fact that which at least one additional opening is formed by a cut (8).

2. Pressure can (100) according to claim 1, characterized by the fact that which has at least one additional opening in the outer surface (6) of the riser pipe (1).

3. Pressure can (100) according to one of the preceding claims, characterized by the fact that which at least one additional opening is arranged at least partially in the outer surface (6) and the second end face (4) of the riser pipe (1).

4. Pressure can (100) according to one of the preceding claims, characterized by the fact thatthe riser pipe (1) has at least two additional openings, and wherein preferably two of the at least two additional openings are arranged diametrically opposite each other at least in certain areas.

5. Pressure can (100) according to one of the preceding claims, characterized by the fact that the riser pipe (1) has more than at least two additional openings, and wherein preferably an angle (α) between two adjacent additional openings measured in the circumferential direction of the riser pipe (1) is at least 90°.

6. Pressure can (100) according to one of the preceding claims, characterized by the fact that the at least one additional opening extends along the riser pipe (1) from the container-side riser pipe opening (5) to the valve-side riser pipe opening (3) over a length (L7) of less than 40 mm, preferably over a length (L7) between 5 mm and 30 mm, most preferably over a length (L7) of 15 mm.

7. Pressure can (100) according to one of the preceding claims, characterized by the fact that the length (L7) of the at least one additional opening to a total length (L1) of the riser pipe (1) has a ratio of at least 1 to 33.

8. Pressure can (100) according to one of the preceding claims, characterized by the fact that the riser pipe (1) is made of a material that is at least partially flexible, for example plastic, and wherein the container-side riser pipe opening (5) is fanned out during the application of a spray agent (102).

9. Pressure can (100) according to one of the preceding claims, characterized by the fact that the riser pipe (1) has at least one circular opening (9) arranged in the outer surface (6) of the riser pipe (1), and wherein the circular opening (9) is preferably arranged between 1.5 cm and 2 cm above a vertex (107) of the concave container bottom (103).

10. Pressure can (100) according to one of the preceding claims, characterized by the fact thatthe riser pipe (1) has a total length (L1) between 145 mm and 170 mm, preferably a total length of 155 mm, and / or wherein the riser pipe (1) has an outer diameter between 1 mm and 7 mm, preferably between 3 mm and 6 mm, most preferably an outer diameter of 4 mm.

11. Pressure can (100) according to one of the preceding claims, characterized by the fact that the pressure can (100) is filled with a propellant and filler material, wherein the filler material comprises at least one lacquer binder.

12. Pressure can (100) according to claim 11, characterized by the fact that the filler material consists of binder and / or pigments and / or solvents, and wherein the filler material has a density between 0.8 g / l and 3 g / l.

13. Pressure can (100) according to one of the preceding claims, characterized by the fact thatthe container wall (105) and the container bottom (103) together form a fold (106), and wherein the container-side riser pipe opening (5) is arranged in an area between the fold (106) and the apex (107) of the container bottom (103).

14. Pressure can (100) according to one of the preceding claims, characterized by the fact that at least partially within the container (104) a 2K component system is arranged, wherein the 2K component system comprises an inner sleeve (110) with a release mechanism, and wherein the release mechanism is configured to permanently open the inner sleeve (110) towards the container (104).

15. Pressure can (100) according to claim 14, characterized by the fact thatthe inner sleeve (110) is arranged on a plate (111) and, as part of the release mechanism, comprises a plunger (112) arranged in the inner sleeve (110) for bursting open the inner sleeve (110), wherein the plunger (112) can be actuated through the plate (111), wherein the inner sleeve (110) is connected to the plate (111) via a spring basket, the spring basket contains a release spring-mounted, the end of which is located at the bottom of the container and is guided through the plate (111) and which acts on the plunger (112), which plunger (112) acts against a diaphragm (113) arranged at the valve-side end of the inner sleeve (110), which diaphragm (113) hermetically seals the inner sleeve (110) at its valve-side end against the contents of the pressure can (100) and is torn open when the release is actuated by the plunger (112),wherein the spring basket is designed to be closed on the valve side and the trigger is provided on the bottom side with a sealing element (115) acting against the inner wall of the spring basket.

16. Use of the pressure can (100) according to one of the preceding claims for liquid 2K component systems, in particular 2K sealing foams, 2K adhesives or 2K lacquers.

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