ES2543403T3 - Single use container, its use and a procedure to pressurize a single use container - Google Patents

Abstract

Single-use container (1), especially single-use paint container, for receiving and distributing a paint fluid by spraying, with a container (2) forming a storage volume for the paint fluid and with a regulation unit of pressure (30) that can be attached to a propellant reservoir (29), the propellant reservoir (29) being arranged or being able to be arranged in a receiving unit (33) of the single-use container, a perforation element being able to be positioned (39) with respect to the receiving unit (33) in order to pierce the propellant reservoir (29), said piercing element (39) being able to move through an adjustment element (47) that can be actuated by the user, characterized in that the perforation element has a sealing section (48) with which an outlet opening (49) produced by the perforation element (39) in the propellant container (29) can be sealed.

Description

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DESCRIPTION

Single use container, its use and a procedure to pressurize a single use container

The invention relates to a single-use container, especially a single-use paint container, for receiving and distributing a paint fluid by spraying, a method for pressurizing such a container and the use of such a container. for paints, varnishes, enamels, impregnants for wood or similar fluids.

Single-use containers are known in the state of the art, for example in the form of aerosol spray cans. In these, a paint fluid and a pressurized propellant reservoir are arranged in the canister. On the upper side of the canister there is a dispensing valve, with which a paint fluid pressurized by the propellant can be sprayed through a spray nozzle located in the valve. A disadvantage of this type of aerosol spray cans is that their filling sizes or volumes are usually limited to between 250 ml and 1000 ml. In aerosol spray cans of higher content, handling worsens disadvantageously or is even impossible. If the user wishes to apply a correspondingly large amount of paint, he is forced to use several of these aerosol spray cans that must be disposed of or recycled with the corresponding impact on the environment.

Another problem with large-volume single-use paint containers is that a loss of pressure in the container, a loss of propellant in the propellant tank and drying or other quality losses of the paint fluid can occur, if not use the complete paint fluid in one application.

A single-use package according to the preamble of claim 1 is disclosed in US 1,196,965.

Starting from the prior art described above, the invention aims to provide a single-use container for receiving and applying a paint fluid by spraying that is suitable for fluid volumes of up to 10 liters or more, which meets a high standard safety, which can be stored safely and without loss of pressure or propellant especially before a first use, in which, after partial consumption, paint fluid can be stored for prolonged periods of time without loss of quality and It can continue to be used, and can be disposed of and recycled well and handled easily. Furthermore, the invention has the objective of providing a method with which a single-use container of this type can be pressurized.

On the part of the device, the objective is achieved by a single-use container, especially a single-use paint container, to receive and apply a paint fluid by spraying, with a container that forms a storage volume for the paint fluid and with a pressure regulating unit that can be connected to a propellant reservoir, the propellant reservoir being arranged or being able to be disposed in a receiving unit of the single-use container, a piercing element to pierce the propellant reservoir with respect to to the receiving unit, a piercing element that can be moved by the user by means of an operable adjustment element and having a sealing section with which an outlet orifice made in the propellant tank can be sealed by the element drilling

By means of the invention it is possible that the propellant reservoir can be preassembled in or inside the receiving unit, without it being able to escape propellant under pressure and that the paint fluid reservoir was subjected to a higher pressure especially during a longer period of time before first use. The only unit that must withstand a constant high pressure is the propellant reservoir itself. The other units of the single-use container instead should only be designed to withstand high pressure for shorter periods of time. This is especially advantageous against the background that the package according to the invention is a single-use container in which less high-quality materials are preferably used than in multi-use containers. In addition, the packaging can be made with less material, which saves resources and costs. A package within the meaning of the invention means a single-use paint container.

The disposition of the propellant deposit in or inside the receiving unit can be done basically in any way. Especially advantageously, it is connected by threaded connection with the receiving unit, so that as a propellant tank, pressurized gas cartridges can be used as usual in the market. In addition, the propellant reservoir can be attached to the receiving unit by a retention joint or by another type of geometric joint. Especially advantageously, the propellant reservoir is a CO2 cartridge. The amount of gas contained in the cartridge or in the propellant reservoir depends substantially on the internal pressure of the container necessary to spray the paint fluid and the volume of the reservoir. It is especially advantageous to use a cartridge of 38 g of CO2 used in the market, together with a 5 liter tank. Depending on the spray can used, it has proved particularly advantageous to

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interior pressure of the vessel between 2.0 bar and 3 bar, preferably 2.5 bar. With a pressure of 2.5 bar, 5 liters of paint fluid can be sprayed using a 38g cartridge of CO2 used in the market. However, these values may vary depending on the paint fluid.

By paint fluid within the meaning of the present invention, especially paints, varnishes, impregnants for wood, oils or similar liquids are understood to be applied by the spray can in the most homogeneously distributed way possible. It is worth mentioning that the spray pressure, the size of the can and the viscosity of the paint fluid to be sprayed must be adapted to each other. Depending on the paint fluid, other propellants can be used instead of CO2. It is worth mentioning for example nitrogen (N2)

or nitrous oxide (hilarious gas, N20).

Preferably, the receiving unit is substantially composed of synthetic material and may be made especially as an injection molding component. It can be composed of other materials or combinations of material, if it must withstand especially high pressures. Preferably, the receiving unit is made in the form of a housing in which the piercing element is housed. It can especially have a hole. In this, the piercing element can be advantageously disposed in a mobile manner in the longitudinal direction of the housing or the through hole. With the invention it is especially proposed that the piercing element is arranged in a mobile manner in a sealed manner with respect to the receiving unit. The sealing can be carried out, for example, by an O-ring arranged between the piercing element and the receiving unit. According to another embodiment, the receiving unit especially has a thread in which the propellant tank can be screwed into the passage hole of the invention. Preferably, the propellant reservoir is sealed with respect to the receiving unit. In particular, a heel can be made for this purpose in which the propellant tank is in tight contact in case of a suitable arrangement. The receiving unit can be connected to the pressure regulating unit directly or indirectly in terms of flow.

The piercing element is preferably composed of synthetic material. On its side facing the propellant reservoir, a piercing tip is made that can penetrate the propellant reservoir or a closure element present in the propellant reservoir and make therein an outlet opening for propellant, through which propellant can exit of the propellant tank. For this purpose, the piercing tip may be temple reinforced by a metal wrap or similar reinforcement. The piercing element is guided in or inside the receiving unit linearly in its longitudinal direction, preferably in its exit hole. For this purpose, the outer contour of the piercing element may correspond to the inner contour of the passage hole present in the receiving unit. A slight game adjustment advantageously exists between the drilling element and the receiving unit, so that the drilling element can move in the longitudinal direction with sufficient guidance with respect to the receiving unit.

In a particularly advantageous manner, the piercing element can be sealed tightly to the propellant with respect to the receiving unit. In the case of a perforation element arranged in a through hole of the receiving unit, a groove in which a sealing element is arranged can be made in the outer contour of the piercing element or in the inner contour of the through hole which seals the gap between the piercing element and the through hole.

On the opposite side of the propellant reservoir, the piercing element may be directly or indirectly attached to the adjustment element to be operated by the user. To do this, it can have a thread that acts together with a corresponding opposite thread in the adjustment element and that during a rotation of the adjustment element can produce a linear movement of the perforation element in the passage hole. The adjustment element is rotatable, but is fixedly arranged in the linear direction of the housing of the receiving unit, while the perforation element is arranged fixedly against rotation, but linearly movable in or inside the unit of reception. Alternatively, the adjusting element may be arranged by means of a thread, especially by means of an internal thread, in the receiving unit, especially in the housing, while the perforation element is disposed movably in the longitudinal direction of the housing. In this case, the piercing element and the adjusting element are fixedly arranged relative to each other in the longitudinal direction, the first not having to present any thread to produce an adjustment for the perforation. For this purpose, an annular groove in which a suitable spring of the adjustment element, or vice versa, can be arranged in the drilling element.

The pressure regulating unit is arranged in the flow path of the propellant behind the receiving unit and serves to regulate the pressure of the high pressure of the propellant reservoir at the low pressure in the vessel. On the high pressure side, it is attached to the propellant tank and, on the low pressure side, it is attached to the vessel, and has a transmission member, through which it can be operated based on pressure variations on the side Low pressure one outlet valve located on the high pressure side. The pressure

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Existing in the container can act on the transmission member through a flexible membrane that closes a low pressure chamber. The intensity of the pressure and therefore the position of the membrane determine the position of the transmission member, by which the position of the outlet valve is controlled. According to a special embodiment, a tilting lever is provided as a transmission element. A lever arm of the pivoting lever, located on the low pressure side, is in contact with the flexible membrane, while a lever arm located on the low pressure side actuates the outlet valve. Advantageously, the transmission member can be prestressed against the membrane, and in particular, the prestress can be adjustable by an end user, whereby the intensity of the adjustable pressure inside the vessel can be determined through the unit of pressure regulation. The outlet valve can be prestressed against the transmission member or the rocker lever only by the pressure existing on the high pressure side. A compression spring of a discretionary type serves advantageously as a pretensioner.

Preferably, the outlet valve has a valve body especially made of synthetic material, arranged tightly in the high pressure conduit between the receiving unit and the pressure regulating unit. For this purpose, the high pressure conduit may be widened towards a valve chamber in which the valve body is arranged being able to move between a closed position that closes the high pressure conduit and an open position that leaves the high conduit free. Pressure. A valve body made especially simple can be used if the valve chamber is provided at its end with a high pressure inlet and on its side with an outlet. In this case, in the closed position, the valve body is in tight contact with the inlet at the end and during opening it moves away from it to its open position in which it leaves the side outlet free. A surface of the valve body facing the inlet is made as a sealing surface that seals the high pressure inlet in the closed position.

Especially advantageously, the membrane is fixed by tightening to the low pressure chamber. It can be connected by tightening to the pressure regulating unit especially by means of a clamping element which is in turn fixed to it by means of retention projections. In this way, an especially easy assembly of the membrane is possible.

In addition, the pressure regulating unit may have an overpressure valve, which prevents the vessel from being subjected to too high a pressure. It is especially advantageous if the overpressure valve is connected as regards the flow to the low pressure chamber by opening it with respect to the environment in case of an overpressure, so that the overpressure can escape into the atmosphere and does not reach the vessel. An overpressure valve of this type can be carried out in a particularly simple and safe way if the low pressure chamber is provided with an outlet to the atmosphere that is tightly closed to the pressure medium by means of a closing body of the overpressure valve , spring loaded. If a pressure is set too high in the low pressure chamber, the closing body is lifted from its valve seat against the spring force and leaves the outlet opening free, so that overpressure can be reduced.

The paint fluid is sprayed with an applicator device, especially with a spray gun. The connecting duct between the pressure regulating unit and the applicator device can be arranged in the fluid container in an especially advantageous manner through an adaptation piece so that the user can remove and replace it. In this way, the connecting duct, as well as the adaptation piece that is presently present and the applicator device, can be easily cleaned in case of partial consumption of the paint fluid. A check or shut-off valve may be arranged in the connection conduit or the adaptation piece, so that the container can be sealed tightly before removing the applicator device or connection conduit and as little as possible is reduced quality of the paint fluid that remains inside it. Thus, although the package according to the invention is a single use container, multiple use in the form of several partial emptyings is possible.

In another embodiment, the single-use package has a piece superimposed on or within which the pressure regulating unit and / or the receiving unit are arranged. More or more units may be arranged on or inside the superimposed piece. Especially, the spray gun or a similar device for applying the paint fluid as well as the connecting duct between it and the pressure regulating unit may be located there. In this way, it is advantageously possible to make containers for large amounts of paint fluid as single-use containers, and during the spraying of paint fluid the container can be placed on the floor or on a corresponding surface by operating and operating only the spray gun regardless of the container and its weight. During the spraying of the paint fluid it is not necessary to move the entire container with the paint fluid received therein, which considerably facilitates spraying and application. The applicator device may be made depending on the shape, size and material of the container. Therefore, it can adapt with greater freedom of design to the anatomy of the hand. Preferably, it is made as an injection molding piece, so that it can be manufactured in a corresponding way with a low weight in an economical and simple way.

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According to another proposal, the superimposed piece can be advantageously made as a synthetic material component, especially as a synthetic injection molding component. According to another proposal of the invention, it can be arranged in the container in such a way that it substantially cannot be removed by the final consumer. In this way, the tightness, functionality and safety of the single-use container can be preserved. Especially, the superimposed piece can be fixed to the edge of the container with retaining elements, for example in the form of a clip joint. Additionally or alternatively, fixing by gluing, direct welding, indirect welding or similar fixing methods is possible. It is especially advantageous if the container edge is made in the form of a flange or provided with a fold. To said flange or fold, the superimposed piece can be fixed by engaging in or out, by means of retention projections or clips. Another possibility of fixing the superimposed part in the container is that on the side of the container wall, opposite the container bottom, a container lid is provided. The container lid may be made in one piece with the container wall or be arranged therein as a separate element in a known manner in a pressure-tight manner. Preferably, the container lid is composed of the same material as the rest of the container. A filling hole may be centrally provided in the container lid, whereby the container on the one hand can be filled with paint fluid and through which on the other hand paint fluid can be extracted from the container. The filling hole can be used in a particularly advantageous way to fix the piece superimposed on the container edge exclusively or in addition to the aforementioned fixation, in an identical or similar manner.

In another embodiment, an ascending tube can be arranged in the superimposed part that looks inside the container. It can be glued, plugged, screwed or otherwise attached to the overlay

or be made in one piece with this. Preferably, the riser tube can be connected to the joint conduit in a tight manner to the flow and be made to receive paint fluid from an area as close as possible to the bottom of the container and transport it to the spray gun. Especially advantageously, the bottom of the container can be made in a bulged manner, so that a deeper point of the container is formed in the center or at the edge. Preferably, the ascending tube ends at said deepest point or near it, so that a practically complete emptying of the single-use container is possible.

According to another proposal, the riser can enter the storage volume through the filling hole. Alternatively, a separate hole in the container may be provided for the riser. Between the ascending tube or filling hole, a sealing plug, preferably of rubber, which is tightly sealed to the fluid and pressure the intermediate space between the tube can be arranged between the rising tube and the edge of the container surrounding the hole ascending and hole edge. As regards manufacturing, it is especially convenient if the sealing plug is fixedly arranged in the riser or attached to it. Especially, the sealing cap may be glued with the riser or be formed therein. In this way, the superimposed part being arranged in the manner provided in the container, the ascending tube can be arranged in a sealed manner in the opening of the container next to the sealing cap in a single working step. Likewise, the sealing cap may initially be arranged in the manner provided in the orifice of the container and subject thereto, if necessary, by geometric connection, forced connection, forming or gluing. In this case, the ascending tube is introduced into the sealing cap during the arrangement of the superimposed piece and, if necessary, it is glued. In a particularly advantageous way, in addition to transporting the paint fluid from the container, the riser also fulfills the additional function of supplying the propellant to the storage volume.

In addition to its function as closure of the container, the superimposed part that closes the container can fulfill other functions at the same time, for example carrying some or all the units necessary for the extraction of the paint fluid, such as the pressure regulating unit, the propellant reservoir, riser, junction, applicator device and safety and shut-off valves provided. The basic shape of the superimposed piece can advantageously correspond to the basic shape of the container, and can be especially circular. Its lower edge may preferably be slightly larger in diameter than the edge of the container on which the superimposed piece is arranged. Then, the superimposed piece can be arranged on or in the container by wrapping the edge of the container. Preferably, the superimposed piece forms a shape that can be stacked and handled well next to the container. In the case of containers in the form of a cylinder or barrel, the complete single-use container may be in the form of a cylinder or barrel, which allows a good stackability. On the opposite side of the container, the superimposed piece may have a deepening or a groove on the outer or inner side. Preferably, this or this extends annularly around the superimposed piece. The width and depth of the groove can be adapted to the length of the connecting conduit, so that it can be accommodated in the deepening or the groove, saving space and being largely protected against damage. For the applicator device disposed in the connecting duct, a housing can be made inside or on the superimposed part. In this, the applicator device may preferably be held by tightening or geometric bonding or by detachable fastening means.

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In order to facilitate the transport of the single-use container according to the invention and improve its manageability, one or more handles can be provided on the superimposed piece. Preferably, these are made on the front side or side of the superimposed piece, opposite the container. An embodiment in the form of a handle in the form of circular segments is especially advantageous, since then on the side of the superimposed piece, opposite the container, a circumferential limitation can be made at least by areas. Especially advantageously, the handle (s) is arranged in a circle or circular segment, parallel to the bottom of the container, such that the base structure of the single-use container composed of the part superimposed and the container is substantially cylinder-shaped, so that the single-use containers according to the invention can be stacked, stored and transported especially well. Alternatively, a handle can be disposed recessed in the superimposed piece, so that a user can place it from this recessed rest position in an extended transport position in which it protrudes from the superimposed piece.

With the invention, a method for pressurizing a single-use container, especially a single-use paint container, is also proposed. The single-use container has a container that forms a storage volume for a paint fluid and a pressure regulating unit that is attached to a propellant reservoir. The propellant reservoir is arranged or disposed in a single-use container receiving unit being sealed tightly to the propellant and is perforated by means of a piercing element that can be positioned with respect to the receiving unit, such that the latter moves in the direction of the propellant reservoir by actuating an adjustment element by the user and seals the propellant tightly with a sealing section of the propellant reservoir. Next, the piercing element moves away from the propellant reservoir, whereby an outlet hole for propellant is free to pressurize in the vessel. The sealing of the propellant tank can be carried out especially in such a way that once the perforation is carried out, the sealing section is in contact with the propellant tank, the outlet opening being free, since the sealing section is released from the tank of propellant.

A high safety standard can be achieved by the method according to the invention. The single-use container can be issued to the end user as a fully assembled and filled unit and be activated, that is, the container is pressurized, just just before use. The use of usual gas cartridges in the market allows safe long-term storage of propellant. For activation, the user activates the adjustment element, so that only a perforation of the propellant reservoir occurs initially. However, the outlet orifice made in the propellant reservoir is still sealed by the sealing section of the piercing element, so that it cannot escape propellant and the paint fluid container is not yet under pressure. Only by the movement of the drilling element moving away from the propellant reservoir, the sealing section is released from the outlet opening leaving it free, so that it can pass propellant to the paint fluid container and it is pressurized. The release of the outlet orifice can preferably be carried out by an additional actuation of the adjustment element. Advantageously, this additional drive is contrary to the first drive for drilling the propellant reservoir. The additionally necessary release of the exit orifice constitutes an advantageous function that provides security, since the possibility of accidental pressurization of the container can be practically avoided.

In addition, by actuating the adjustment element again, the perforation element can be placed in a position that seals the outlet opening. In this way, the propellant reservoir can be sealed tightly to the propellant especially after a partial consumption of paint fluid. For temporary storage of the single-use container, the pressure in the container can be reduced, for example, by a purge. If necessary, the applicator device and the connecting duct can be cleaned without using a new propellant reservoir for a next use of the single-use container started.

More features and details result from the following non-exhaustive description of the figures, in which they show:

Figure 1, a single-use container in a sectional side elevation, Figure 2, an overlapping piece of a single-use container in a first sectional view, Figure 3, an overlapping piece of a single-use container in a second sectional view, figure 4, an overlapping piece of a single use container in a third sectional view, figure 5, (a, b, c) an overlapping piece of a single use container in a fourth view in section with two enlarged detail views, figure 6, a piece superimposed in a perspective representation, figure 7, the superimposed piece of figure 6 with the handle extended, figure 8, a plan view from above of a superimposed piece of the single-use container, provided with a

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cap, and figure 9, (a, b, c) the high pressure shut-off valve shown in figure 3, augmentedly in different operating positions.

A single-use container 1 with a container 2 and an overlapping part 3 is shown in a sectional side elevation in FIG. The container 2 has a substantially circular container bottom 4 as well as a container wall 5 attached thereto. The bottom of the container 4 is domed in its inner area towards the inside of the container. In this way, the outer edge 6 of the container bottom 4 forms an annular positioning zone on which the single-use container 1 can be placed securely and stably. The outer edge 6 has a fold 7 that is flanged outward and in the direction of the container wall 5 and in which the bottom edge of the bottom 4 is housed in a fluid and pressure tight manner. On the side of the wall of container 5, opposite to the bottom of container 4, a container lid 10 is arranged. This, like the bottom of container 4, is domed in its inner area towards the interior space of the container, so that it is realized a circumferential lid edge 11. Similar to the container bottom 4, the container lid 10 is attached to the upper fold 9 of the container wall 5 in a fluid and pressure tight manner by means of a flange. The circumferential lid edge 11 forms a positioning surface on which the container 2 can be deposited and stored as a semi-finished product (without overlapping part 3) or for filling by means of a filling lance. It is especially advantageous if the shape of the container bottom 3 and the outer edge 6 is adapted to the shape of the container lid 10 and the lid edge 11, such that the container bottom 4 and the container lid 10 of two containers 2 stacked on each other can engage one in another and partly around each other, so that, as a semi-product, the containers 2 can be stacked, stored and transported especially well. In the container lid 10 a filling hole 13 is provided centrally. An ascending tube 18 that is formed either directly in a base body 14 of the superimposed part 3, which is described in detail below, or tightly connected to this, looks inside the container 2 through the filling hole 13. The length of the ascending tube 18 is sized such that its bottom, open bottom end 19, ends in a hollow 20 in the form of bottom concavity of container

4. In this way, it is guaranteed that the paint fluid received in the container 2 through the ascending tube 18 can be extracted substantially completely and without rest. The sealing between the riser tube 18 and the container lid 10 is carried out through a plug 23 inserted in the filling hole 13 by circling the riser tube 18 in a fluid and pressure tight manner.

The superimposed part 3 for the single-use container 1 is represented in different sectional views in Figures 2,3 and 4 and in perspective views in Figures 5 and 6. It has a base body 14. This is made correspondingly to the shape of the container, for example in a circular shape, on the side that when the superimposed part 3 is arranged in the intended manner it is oriented towards the container 2 (as shown in Figure 1), and has an annular end edge 15 , whose inner diameter is slightly larger than the outer diameter of the upper lid edge 11, so that it can engage around the container 2. In the area of the final edge 15 retention elements 12 are made which can engage in retention counter-structures corresponding in the container 2 interlocking with them, so that the superimposed piece 3 is arranged securely and stably in the container 2.

The riser tube 18 can be attached to a conduit 24 for the application of paint fluid. Then, the paint fluid sucked from inside the container through the riser tube 18 is conducted through the conduit 24 towards the spray gun 25 as an applicator device. In the figures it is shown that the conduit 24 is wound in a deepening 26 made on the outer side in the base body 14 of the superimposed piece 3 for transport and storage purposes. It can be unwound to spray the paint fluid having to be attached, in a manner described below, to the riser tube 18 on the one hand and the spray gun 25 on the other hand.

On the side of the superimposed piece 3, opposite the annular end edge 15, a grabbing element 27 is realized. As can be seen especially in figures 5 and 6, the grabbing element is mobilely supported with respect to the piece superimposed 3, in the base body 14 thereof, so that it can be passed from a resting position (represented in Figures 1 to 5) that ends substantially flush with the upper side of the superimposed piece 3, to a position of transport removed represented. So that the grabbing element 27 can be easily grasped by a user in the resting position, a cavity 31 is provided in the base body 14 of the superimposed part 3. Since in its resting position, the grabbing element 27 ends flush with the upper side of the superimposed piece 3, several single-use containers 1 can be stacked on top of each other easily and stably.

A cover element 32 is placed through the superimposed part 3 for protection during transport. This has a cavity 16, through which the gripping element 27 can be grasped and placed in the transport position. Advantageously, the outer contour of the cover member 32 is slightly more

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smaller than the inside diameter of the outer edge 6 of the bottom of container 4, so that by stacking several packages, the outer edge 6 of a top single use container can engage around the lid element 32 of a lower single use container, so that a particularly stable placement is possible.

The spray gun 25 is made in the form of a synthetic injection molding component as a single-use spray gun. It has a shut-off valve not shown in the figures that can be operated by a handle. To spray a paint fluid received in the container 2, the interior space of the container is charged through the pressure regulating valve 30 by CO2 as a propellant from a CO2 pressure cartridge 29 as a propellant reservoir, so that it remains guaranteed the desired internal pressure and substantially constant for extraction. When the shut-off valve is opened by the actuation of the spray gun 25, the paint fluid contained under overpressure in the container 2 is sprayed through the riser tube 18, the conduit 24 and the spray gun 25. The spray gun 25 is arranged in a cavity made in the base body 14 and held therein by means of a clamping device not shown.

As can be seen especially in Figures 2, 3 and 4, the CO2 pressure cartridge 29 is screwed into a receiving element 33 which by means of screwed joints 21 or a clip joint is fixed to the base body 14 of the overlapping part 3 For fixing to the receiving element, the CO2 pressure cartridge 29 has an external thread 34 made in its neck area. The receiving element 33 has an internal thread 22 matching it, which is arranged in a widened area 35 of a through hole 36 which passes through the receiving element 33 in its longitudinal direction. At its opposite end to the CO2 pressure cartridge 29, the widened area 35 ends in a heel 37. The CO2 pressure cartridge 29 is with its end in tight contact with the heel 37 with a sealing element interposed.

On the side of the hole 36, opposite to the heel 37, this is made with a smaller diameter compared to the widened zone 35. The inner contour of the passage hole there forms a guide zone 38 for a piercing element 39 disposed in the passage hole 36. At the end of the passage hole 36, opposite the widened zone 35, another heel 40 is arranged as end stop for drilling element 39.

The piercing element 39 is substantially cylindrical in shape and has a piercing tip 42 towards its CO2 pressure cartridge 29. It also has a guide area 43 which, with a small clearance, corresponds to the guide area 38 of the through hole 36. In the perforation element 39, a groove 41 is arranged approximately centrally in the guide area 43 in which an O-ring 28 is arranged. It is sealed between the perforation element 39 and the guide area 38 tightly to the propellant. At the opposite end of the piercing tip 42, the piercing element 39 is provided with a attachment appendix 44. This has a reduced diameter with respect to the guide area 43, so that a bead 45 is made which at its It also prevents the piercing element 39 from falling out of the passage hole 36. The piercing element 39 also has a sealing zone 48 which, when the piercing element 39 is moved towards the CO2 pressure cartridge 29 is in tight contact with it preventing the propellant from exiting through the outlet hole 49 drilled by the piercing tip. The sealing zone 48 is especially made in the form of a flat sealing surface that when the piercing element 39 is positioned correspondingly comes into tight contact with the CO2 pressure cartridge 29.

At its opposite end to the CO2 pressure cartridge 29, the receiving element 33 has an external thread 46 which acts in conjunction with an internal thread matching a rotary knob 47 as an adjustment element. The rotary knob 47 can be moved by a rotation with respect to the receiving element 33, in its longitudinal direction. Furthermore, it is attached to the attachment appendix 44 of the piercing element 39 so that it, by its actuation, can be moved in the longitudinal direction of the passage hole 36. When the rotary knob 47 is rotated in a first direction, the piercing element 39 moves in the direction of the CO2 pressure cartridge 29, such that it is perforated by the piercing tip. Without additional actuation of the rotary knob 47, the piercing element 39 remains in the position where the cartridge is perforated. In this, the outlet orifice 49 made in the cartridge by the piercing tip 42 is sealed tightly to the propellant by the sealing zone 48, such that initially it cannot propellably exit through the CO2 pressure cartridge 29. During a turn in the opposite direction, the piercing tip then moves away from the CO2 pressure cartridge 29, during which the sealing zone 48 is released therefrom leaving the outlet orifice 49 free. Once released, it can be released. passing propellant from the CO2 pressure cartridge 29 to the chamber 50 that is formed when the piercing element 39 is moved backwards. This is connected to the pressure regulating valve 30 through a passage not shown in the figures. By turning the rotary knob 47 again, the piercing element 39 can be moved backward in the direction of the CO2 pressure cartridge 29, so that its sealing zone 48 re-enters a sealed contact by closing the outlet opening 49 of watertight

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propellant

The pressure regulating valve 30 can be seen well in Figure 3. It has a tilting lever 51, a high pressure chamber 52, a low pressure chamber 53, a closing valve body 54, a propellant passage 55 as high pressure conduit, a compression spring 56 as well as an elastic membrane 57. The chamber 50 formed in the receiving element 33 is connected to the high pressure chamber 52 through the passage not shown. This is in turn connected to the low pressure chamber 53 through the propellant passage 55.

In the propellant passage 55 a high pressure shut-off valve is arranged with the shut-off valve body 54, through which the propellant passage 55 can be closed. The high-pressure shut-off valve is schematically represented in the figures. 9a to c. The closing valve body 54 is arranged in the widened propellant passage 55 forming a valve chamber 69, is guided by the wall of the valve and can be moved between a closed position that closes it (Figure 9a) and an open position ( figure 9b). It is provided with a circumferential groove 67 in which an O-ring 68 is arranged which is sealed between the closing valve body 54 and the wall of the valve chamber 69. Frontally, the closing valve body 54 is provided with a seal of valve seat 70 which in the closed position is in a sealed manner above the propellant passage 55 which flows into the valve chamber 69. On its side opposite the valve seat seal 70, the closing valve body 54 it is made with a rounded head 71 which, as shown for example in figure 3, is in contact with the rocker lever 51. In the open position, the closing valve body 54 is moved in the direction of the rocker lever 51, whereby the valve seat seal 70 is released from the sealing position. In the open position, the part of the propellant passage 55 that joins the valve chamber 69 to the low pressure chamber 53 is released by the shut-off valve body 54, so that it can pass propellant from the CO2 pressure cartridge 29 to the low pressure chamber 53. During release by the rocker lever 51, described below, the closing valve body is moved from the closed position to the open position by the high pressure in the pressure cartridge of CO2 29 acting on the valve seat seal 70. The reverse closing procedure is produced by a corresponding prestressing of the rocker lever 51.

On one side, the low pressure chamber 53 of the pressure regulating valve 30 is closed with the elastic membrane 57 and connected to the container 2 through a propellant outlet 58 and to the valve chamber 69 through the outlet propellant 55. The rocker lever 51 is pivotally supported around a pivot joint 60 and contacts a lever arm 59 located on the high pressure side of the head of the closing valve body 54 and, with a lever arm 61 located on the low pressure side, the elastic membrane 57. In addition, the lever arm 61 located on the low pressure side is prestressed in the direction of the membrane 57 through the compression spring 56. The elastic membrane 57 is clamped between a clamping ring 62 and the base body 14. The clamping ring 62 is fixed to the base body 14 through retaining elements 17.

Because of the connection to the container 2, in the low pressure chamber 53 there is the internal pressure present in it. As can be seen directly in Figure 3, a balance of forces is adjusted on the rocker lever 51 with which the force exerted by the compression spring 56, plus the high pressure in the high pressure chamber 52 acting on the surface of cross section of the shut-off valve body 54, they act against the internal pressure of the low pressure chamber 53 (corresponding to the pressure in the vessel 2) acting on the membrane 57. This balance is adjusted such that in case of equilibrium in the low pressure chamber 53 and the container 2 there is the desired pressure for the application (spraying) of paint fluid. If the pressure in the vessel and the low-pressure chamber decreases during application, due to the imbalance of forces caused by this, a pivoting of the rocker lever 51 occurs (in the representation of Figure 3, in the opposite direction to clockwise) During this, the lever arm 59 located on the high pressure side moves away from the shut-off valve body 54, so that it leaves its closed position due to the pressure in the high pressure chamber 52 leaving the propellant passage 55. Then, the propellant subjected to high pressure can pass from the high pressure chamber 52, through the propellant passage 55, to the low pressure chamber 53 and, from there, through the propellant outlet 58, to the container 2, thereby restoring the balance of forces on the rocker lever 51. The more the pressure in the low pressure chamber 53 increases again, the more the rocker lever returns to its starting position, returning the shut-off valve body 54 from the position that releases the passage of propellant 55 to its closed position.

In the base body 14 an outlet passage 63 is carried out. The base body 14 appears with an appendix 64 inside the container 2 passing through the filling hole 13 present in the container lid 10. The riser tube 18 forms an extension of the appendix 64. In the outlet passage 63, at its opposite end to the riser 18, an adaptation piece 65 is plugged in which on the side opposite the outlet passage 63 is provided with a connecting piece 66 to which it is possible connect conduit 24 (see figure 3). Instead of the adaptation piece plugged into the outlet passage 63, the adaptation piece 65 shown in Figures 5a and 5c which is inserted in a shut-off valve 71 can be used. In this way, the conduit can be disassembled

10

fifteen

twenty

25

30

35

40

Four. Five

fifty

55

60

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24 with the spray gun 25, for example for cleaning or transport purposes, without impurification of the paint fluid still remaining in the container 2. The shut-off valve 71 has substantially a valve body 77 in which a valve seat 72 is made which, by means of a closing element 73, can be sealed tightly to the paint fluid and a closing element 73. The closing element 73 is screwed by an external thread 76 in the valve body 77 and It can be positioned with respect to this by means of the thread. In addition, the closing element 73 is hollowly made with a through hole 74 in which the adaptation piece 65 is housed at the same time. When the closing valve 71 is closed, that is, when the element closure 73 is completely screwed into the valve body 77, the valve seat 72 is closed by a seat joint 75. When unscrewed, the valve seat 72 opens by releasing the seat seal 75 and the paint fluid can pass the conduit 24 through the passage hole 74 and the adaptation piece 65.

In Figures 5a and 5b, an overpressure valve 78 is shown designed to prevent overloading of the container 2 by too high a pressure. The overpressure valve 78 closes an outlet 79, through which the low pressure chamber 53 is connected to the environment. It is substantially composed of a valve body 81 provided with a gasket 80, a compression spring 82 and a base body 83. The latter is stationary arranged in the base body 14. The compression spring 82 presses the body of valve 81 with the gasket 80 with respect to the base body 83 in the direction of the outlet 79, so that the gasket 80 closes it tightly to the pressure medium. When the pressure in the low pressure chamber 53 rises too high, the valve body 81 is lifted from the outlet 79, by means of the seal 80, against the prestressing of the compression spring 82, so that the medium pressure can escape from the low pressure chamber 53 to the surroundings by avoiding an overload of the container 2. Once the overpressure has been purged and the desired pressure in the low pressure chamber 53 and the container 2 has been reached, the overpressure valve 78 closes automatically by the effect of compression spring 82.

List of reference signs

1 Single-use container 2 Container 3 Overlapping piece 4 Container bottom 5 Container wall 6 Outer edge 7 Fold 8 Sealing element 9 Fold (top) 10 Container lid 11 Cap edge 12 Retention element 13 Filling hole 14 Body base 15 End edge 16 Cavity (at 32) 17 Retaining element 18 Rising tube 19 Rising tube end 20 Concave-shaped recess 21 Screw joint 22 Inner thread 23 Plug

37 Heel 38 Guide area 39 Drilling element 40 Heel 41 Groove 42 Drilling tip 43 Guide area 44 Attachment attachment 45 Heel 46 Outside thread 47 Rotary knob

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48 Sealing section 49 Exit hole 50 Chamber 51 Tilt lever

5 52 High pressure chamber 53 Low pressure chamber 54 Shut-off valve body 55 Propellant passage 56 Compression spring

10 57 Membrane 58 Propellant outlet 59 Lever arm located on the high pressure side

24 Duct

15 25 Spray gun 26 Drilling 27 Gripping element 28 O-ring 29 CO2 pressure cartridge

20 30 Pressure regulating valve 31 Cavity (in 14) 32 Cap element 33 Receiving unit 34 External thread

25 35 Widened area 36 Passage hole 73 Locking element 74 Passage hole 75 Seat seal

30 76 77 Valve body 78 Overpressure valve

60 Swing joint

35 61 Toggle arm located on the low pressure side 62 Tightening ring 63 Exit step 64 Appendix 65 Fitting part

40 66 Connecting piece 67 Groove 68 O-ring 69 Valve chamber 70 Valve seat seal

45 71 Shut-off valve 72 Valve seat 79 Outlet 80 Seal 81 Valve body

50 82 Compression spring 83 Base body

Claims (12)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 1.-Single-use container (1), especially single-use paint container, to receive and distribute a paint fluid by spraying, with a container (2) that forms a storage volume for the paint fluid and with a pressure regulating unit (30) that can be attached to a propellant tank (29), the propellant tank (29) being arranged or being able to be arranged in a receiving unit (33) of the single-use container, being able to position a piercing element (39) with respect to the receiving unit (33) in order to pierce the propellant reservoir (29), said piercing element (39) being able to move through an adjustment element (47) which can be operated by the user, characterized in that the piercing element has a sealing section (48) with which an outlet orifice (49) made by means of the piercing element (39) can be sealed in the propellant tank (29). 2. A single-use container according to claim 1, characterized in that the receiving unit (33) has a through hole (36) in which the piercing element (39) is arranged, being able to move in the longitudinal direction of the latter, being specially arranged in such a way that it moves tightly with respect to the receiving unit (33). 3. Single-use container according to claim 2, characterized in that the receiving unit (33) has a thread (22) with which it is screwed or the propellant tank (29) can be screwed. 4. Single-use container according to claim 2 or 3, characterized in that the passage hole (36) has a heel (37) with which the propellant tank (29) is in a sealed contact in case of a suitable arrangement. 5. Single-use container according to one of the preceding claims, characterized in that the adjustment element

(47)

It has a thread and is attached to the drilling element (39), such that the drilling element

(39)

it can be moved with respect to the receiving unit (33) by means of a drive, especially a rotation drive, of the adjustment element (47).

6. Single-use container according to one of the preceding claims, characterized in that the receiving unit (33) is connected to the pressure regulating unit (30) in terms of flow. 7. Single-use container according to one of the preceding claims, characterized in that it has an overlapping part (3) in which the pressure regulating unit (30) and / or the receiving unit (33) is arranged. ). 8. Single-use container according to claim 7, characterized in that the superimposed part (3) is fixed tightly to the container edge (9) of the container (3), especially with retaining elements (17) or with a joint by clips. 9.-Procedure for pressurizing a single-use container (1), especially a single-use paint container, which has a container (2) that forms a storage volume for paint fluid and a pressure regulating unit (30 ) which is attached or can be attached to a propellant reservoir (29), in which the propellant reservoir (29) is arranged tightly to the propellant in a receiving unit (33) of the single-use container and is perforated by a piercing element (39) that can be positioned with respect to the receiving unit (33), such that the piercing element (39) moves in the direction of the propellant reservoir (29) by means of a drive by the user, especially a rotation drive of an adjustment element (47), sealing with a sealing section (48) the propellant tank (29) in a sealed manner to the propellant once the perforation has been carried out, the perforation element being moved ration (39) then moving away from the propellant reservoir (29), whereby an outlet opening (49) for propellant to pressurize the container (2) is free.

10.

Method according to claim 9, characterized in that the piercing element (39) moves away from the propellant reservoir (29) by means of a drive of the adjustment element (47).

eleven.

Method according to claim 9 or 10, characterized in that when the adjustment element (47) is reactivated, the perforation element (39) is placed in a position that seals the outlet opening (49) of the propellant tank (29) .

12.

Use of a container according to one of claims 1 to 8 for paints, varnishes, enamels, impregnators for wood and similar fluids.

12