AEROSOL SPRAYER WITH ACTIVATION DEVICE THAT FUNCTIONS BY MOVEMENT IN ONE DIRECTION

专利摘要:
Aerosol canister (10) comprising a canister body (12) in which a cartridge (14) is coaxially inserted and stabilized, coupled to an activator or valve lever (16) housed in a recessed portion (18) of a face of the body (12) from which the cartridge protrudes with a shaped appendage (20) forming the shaft for connection to the valve lever (16); wherein the lever defines, in the central portion, a circular core (22) forming a circular mouth (30) starting from a circular crown (28). The core includes a series of shaped recesses (26) extending at least partially circumferentially along the inner side surface (26 ') of the core and adapted to cooperate with complementary protrusions (36) extending on at least one part of the circumference of a sleeve (32). The sleeve is engaged in the circular mouth (30) and is connected to the formed appendage (20).
公开号:BE1023387B1
申请号:E2016/5070
申请日:2016-01-27
公开日:2017-03-01
发明作者:Rudi LETEN
申请人:Soudal；
IPC主号:

专利说明:

AEROSOL SPRAYER WITH ACTIVATION DEVICE THAT FUNCTIONS BY MOVEMENT IN ONE DIRECTION
Domain of the invention
The present invention relates to an aerosol spray can with an activating device that functions by movement in one direction. More specifically, this invention relates to an aerosol spray can or pressure can into which two different components, which are kept separate from each other, are inserted, and these two different components should only be mixed for subsequent use to obtain and deliver the desired substance . Mixing is triggered by rotating an activation device or a valve lever.
BACKGROUND OF THE INVENTION
Aerosol spray bottles or cans of this type are often called two-component canisters or 2K cans. They are known and are used in, for example, the cosmetics sector, the paint sector, the lubricant sector, in polyurethane foam compositions, and in the industrial sector in general.
Aerosol cans are usually made of sheet metal and usually have a concave bottom or rear and a convex top or top, both of which are usually attached to either side of the cylindrical can body by means of a flange. The bottom or rear of the can is made concave to withstand the pressure inside the can. The concave bottom also makes it easier to place the can with its rear on a virtually flat surface, in an upright position. The top is made convex for the same reason as pressure resistance, and is usually provided with a central opening. The opening is intended for filling the container, after which the valve of the container is installed by fixing the valve plate in the opening, thereby closing the container or canister. Next, propellants can be added by pushing them through the valve. The convex shape of the top allows easy access to the valve of the container, for example for mounting a reducer.
The concave bottom brings another advantage. If the pressure in the can exceeds the prescribed level, the concave shape of the bottom, as the weakest part, is expected to yield and turn inside out to convex bottom or rear, usually with a loud and clear sound. This action significantly increases the internal volume of the bus, resulting in an immediate reduction in pressure in the expanded bus. An additional advantage is that when the canister is upright on a flat surface, for example on a store shelf, the expanded canister is raised in its entirety and can no longer maintain its stable upright position. The expanded, and thus defective, bus can therefore be easily noticed in a group of similar buses, such that appropriate measures can be taken by an operator or supervisor.
Characteristic of the 2K-type canisters is that the second component is stored in a separate cartridge, inside the larger container that contains the first component. Shortly before its intended use, the cartridge must be opened to the contents of the container, by an action from outside the container, and the two components can mix, which is usually promoted by the user shaking the container. In many cases, a chemical reaction takes place between certain components in the two components, forming the one mixed composition that is desired, ready to be released from the container, again by an action of the user, this time with the valve of the recipient.
An example are polyurethane foam-forming compositions, wherein the first component (or component 'A') is supplied in a first container and usually contains a prepolymer with residual isocyanate functionality, while the second component (or component 'B') is supplied from a second container and a curing agent, ie a polyfunctional isocyanate-reactive compound, usually a low molecular weight polyol, preferably with primary alcohol functions. Generally, the second component also contains a catalyst for the reaction between isocyanate and polyol, usually a tertiary amine. At the time of use, the two components are mixed, and the resulting mixture is applied to the desired location. The result is a very fast curing mixture that forms a product with high density and high-quality mechanical properties, which is extremely suitable for the building industry, for example for mounting doors and window frames. Optionally, some water may be added to the polyol, whereby CO 2 forms; in this case, propellants may not be strictly necessary to obtain a foam.
For professional experts and intensive users, usually in a workplace, it is common for the two components to be provided in two separate containers. The system with the two containers under pressure and the mixing and application tools is regarded in industry as "the pure 2K delivery system".
For less experienced and / or less intensive users, and in particular for improved practicality in a construction site environment, a variant of the 2K delivery system has been developed in which the second component is contained in a cartridge housed within the container with the first component. To distinguish this version from the 'pure 2K delivery system' described above, such delivery systems are sometimes referred to as 1.5K or 11 / 4K PU cans, for example in Figure 1 on page 13 of The Foam Manual by A. De Schrijver , which first appeared in 1986. For the sake of simplicity, the term 2K buses or two-component buses will be used in this document to designate buses of this type including an internal cartridge for the second component.
The two components containing the 2K bushings are insulated from each other in sealed independent spaces, one of which is integrated into an internal cartridge, which generally has a cylindrical shape and which is coaxially placed in the bushing during assembly of the set and is stabilized relative to it in any known manner. Such 2K buses have been widely known for several decades now. Suitable buses were described, for example, in EP 42128, WO 84/01355 and WO 85/00157.
The internal cartridge of such cans is provided with an activation device, usually in the form of a valve lever, protruding from the rear or bottom of the bottle or can. The valve lever can be operated manually by the user, usually by rotation, to activate the valve of the cartridge, thereby opening the cartridge whenever it is necessary to mix the two components together. After mixing, by pressing on a conventional dispensing valve installed as the valve of the container, the user can deliver or spray the composition formed by the mixing toward the target, or directly onto it.
An embodiment is also known which is described in the Italian utility model ITMI2012000421, published under No. IT-U-278.593, wherein the activation unit or device of the cartridge or valve lever is adapted to fit completely into the cavity of the bottom and does not protrude downward from the rear of the can body, beyond the edge of the bottom flange. This prevents unwanted knocks and movements of the device itself, which could potentially cause damage to the entire bus. Moreover, a canister of this type can be stably placed on any substantially flat surface, since the activation device does not protrude, even to the slightest extent, from the bottom of the canister. An additional advantage is that the bottom cavity can be closed with the valve lever by means of a simple, flat, flexible casing which, for example, fits over the bottom flange of the container and leaves sufficient space in the cavity for an accessory, such as a pair of folded disposable gloves from polymeric material.
Another embodiment with respect to the two-component buses contemplated herein is described in ITMI2013000396, published under No. IT-U-280,846. Both 1K buses and 2K buses are described in that document. In both embodiments, the sleeve also has a concave shape at the upper end, instead of the conventional convex tip, this concave shape having a central opening. In the embodiment as a 2K bus, the opening can be used for inserting and stabilizing the cartridge. Therefore, the activation device of the latter is placed at the upper end of the can body, not protruding relative to it because it is completely housed within the concave shape. The main purpose of this embodiment is to reduce the overall height of the can, particularly when the protective lid is in plastic, which is usually placed on the convex top of pressure cans to protect the valve of the container from damage or unintentional opening. At the same time, the cartridge activation device is conveniently protected in the concave top according to ITM12013000396, because it does not protrude from the body. In addition, a plastic cover of low height is sufficient to create a flat and uniform surface at the upper end, while again providing sufficient space for an accessory, such as a pair of folded plastic gloves. In all intended embodiments of the 2K bus, the activation device of the cartridge advantageously consists of the aforementioned valve lever, which is generally made of plastic material.
It was noted, however, that the movement of the lever or trigger device has a major drawback associated with the direction of rotation to which it is subjected manually.
These devices or valve levers traditionally require a rotation to the right, or clockwise, to activate the cartridge; this movement is the most spontaneous and intuitive for most people, except for left-handed people, who tend to automatically try to turn counterclockwise. Incidentally, even at least in an initial phase, right-wing users may unknowingly or unintentionally rotate the valve lever of such conventional aerosol spray cans in the direction opposite to the direction traditionally provided for activating the cartridge.
In both cases, considerable damage to the bushing can occur as a result of such rotation in the wrong direction, this rotation usually being carried out with significant force. This can lead to serious damage and can result in a considerable safety and / or industrial hygiene hazard. For example, it may occur that the activation handle is pulled out of its seat, resulting in a potential leak of fluid under pressure, which may render the aerosol sprayer unusable and lead to contact of the skin and / or eyes of the user with the contents of the container, which is generally still chemically reactive.
Another problem with the 2K buses described above has to do with the force to be exerted to open the cartridge and thereby cause the mixing of the second component from the cartridge with the first component present in the container and the cartridge.
In many conventional 2K buses, a rod runs axially concentrically through the cartridge over its entire length. The rod extends at one end through a gasket or seal beyond the cartridge, and also beyond the concave surface of the bottom of the container, and at that end the rod is adapted to be connected to the valve lever. The other end of the rod cooperates with an internal seal or lid of the cartridge, such that, for example, an axial rotation or axial movement of the rod is able to push the lid away from the cartridge and open the cartridge toward the surrounding contents of the container.
In a fully assembled 2K container in accordance with the present invention, the lid of the cartridge is subject to considerable forces, requiring a greater force to push the seal or lid away, and thus to open the cartridge. One force component is usually due to a pressure difference between the pressure in the container where the first component is located and the pressure in the cartridge where the second component is located. The pressure within the container can be, for example, 6 bar overpressure (barg), and can be higher than the pressure in the cartridge, which can, for example, be only 1 barg or even be the atmospheric pressure, and the pressure difference can thus result in a first , important net force component, the advantage of which is that this first force component holds the lid of the cartridge in place at the upper end of the cartridge, but the disadvantage is that this first force component must be overcome to open the cartridge.
It should further be appreciated that the pressure within the cartridge acts only on a portion of the surface of the underside of the cartridge lid, i.e. the surface without the area occupied by the rod where the rod engages the lid. A net force on the lid, on top of any pressure difference between the container and the cartridge, is therefore the force corresponding to the pressure in the container that acts on the part of the outer surface of the lid that has no equivalent area on the inner surface, because the internal rod of the cartridge engages the inside of the lid. In other words, because the rod occupies a part of the inner surface of the lid, the inner surface on which the pressure in the cartridge acts is smaller than the outer surface on which the pressure of the container acts. This difference in operating area results in a second net force component that presses the lid onto the cartridge, even if the pressure in the container and in the cartridge were equal to each other. The inventors have found that this second net force component can also be a significant factor in relation to the total force that must be overcome to open the cartridge by pushing the lid upwards.
In order to keep the two components in the aerosol spray can or pressure canister separate, a seal is usually provided at the location where the cartridge cover engages the top or wall of the cartridge. The seal can be, for example, an O-ring in rubber around the part of the lid that penetrates into the cartridge. Applicants have observed that when filling the cartridge with the second component, a small amount of this second component may remain on the inner surface of the top or wall of the cartridge where the lid, after closing the cartridge, engages the wall of the cartridge. Later, the space in the container surrounding the cartridge is filled with the first component, and the container is sealed by installing the valve. The first component may then come into contact with the small amount of the second component against the inner surface of the cartridge wall. The two components react quickly with each other, in many cases forming a cross-linked polymer with strong bonding force. This adhesive thus adheres the lid and / or the O-ring to its environment, in particular to the wall of the cartridge. The adhesive force of this small amount of cross-linked polymer at this location represents a third net force component that must be overcome to open the cartridge by pushing the lid up.
The object of the present invention is to prevent the disadvantages mentioned above.
More specifically, the object of the present invention is to provide a aerosol aerosol sprayer of the two-component type with the intention of avoiding any disadvantage in case the user subjects the activation device to a rotational movement opposite to the rotational movement intended for opening the cartridge and then mixing the two substances in the can itself.
A further object of the present invention is to provide a two-component type aerosol spray can in which the opening of the valve of the internal cartridge takes place only after the respective clockwise rotation of the respective one activation device.
A further object of the present invention is to provide users with a two-component type aerosol spray can intended to ensure high durability and reliability, and which can also be produced easily and cheaply.
It is an object of the present invention to eliminate or at least alleviate the problem described above or the problems described above, and / or to provide improvements in general.
Summary of the invention
According to the invention, an aerosol spray can is provided as defined in any of the appended claims.
These and other objects are accomplished by the two-component type aerosol spray can of the present invention according to the main claim.
In one embodiment, the present invention provides an aerosol spray can or pressure can, specifically of the two-component type, with an activation device that functions by movement in one direction to activate the internal cartridge, comprising a can body in which the cartridge is coaxially inserted and is known in a known manner stabilized, coupled to a valve lever or device for activating it, housed in a recessed portion of the top or bottom of the body, from which the cartridge itself protrudes with a molded appendix that forms the mandrel or shaft for connection to the valve lever, the latter defining a circular core in the central portion from which the two opposite branches of the lever develop, the internal diameter of the circular core decreasing to form a circular mouth starting from a circular crown, the characteristic that the valve lever, in the central portion consisting of the core, is provided with a series of shaped indentations which extend at least partially circumferentially along the internal side surface of the core and are intended to cooperate with complementary protrusions extending on at least one portion of the circumference of a sleeve that is engaged in the circular mouth and connected to the molded appendix of the cartridge.
We have found that with the 2K pressure sleeve in accordance with the present invention, the opening of the valve or lid of the internal cartridge only takes place as a result of rotating the activation device in the correct direction, usually the clockwise direction of the clockwise.
When the activation device is rotated in the correct direction, the protuberances engage the complementarily shaped indentations, which causes the torsional force of the core of the activation device to be transmitted to the sleeve, and thus further to the molded appendage and thereby to the Rod. The rotation of the rod then pushes the cover away from the cartridge. On the other hand, when the activation device is rotated in the wrong direction, the core rotates freely around the sleeve, and is unable to cause a rotation of the rod.
We have determined that a rotational movement exerted on the activation device against the direction intended for the opening of the valve or lid of the internal cartridge does not entail any risk of damage to the container, safety risk or risk of industrial hygiene, such as pulling the rod or activation handle out of the seat, damage to the cartridge lid, leakage of pressurized liquid, or possible contact of the skin and / or eyes of the user with the contents of the container.
An additional advantage is that a rotational movement exerted on the activating device against the direction intended for the opening of the valve or lid of the internal cartridge will make a noise, usually a clicking noise. Such a clicking sound is a clear and intuitive sign to the user that the movement he was making will have no effect. The sound will give the user a quick and clear signal that he must turn the valve lever in the opposite direction to activate the container. The present invention therefore brings with it the advantage that the user is quickly informed of the failure of his attempt to activate the container, and thus can perform the correct action on the valve lever faster and activate the container. The present invention therefore also represents a time saving for the user.
We have further found that the pressure sleeve according to the present invention exhibits even greater resistance to damage due to incorrect manipulation, as well as even greater reliability for good and error-free operation, compared to the pressure sleeves known in the art, and moreover easily and can be produced cheaply.
In one embodiment, the present invention provides a method for producing the sleeve (10) according to any of the preceding claims, comprising the steps of folding a rectangular metal plate into a cylinder and welding two sides of the metal plate to form the cylindrical portion of the can body (12), flange-mounting a concave surface at one end of the cylindrical portion, thereby forming the recessed portion (18), the plane forming a central opening for receiving a cartridge (14), coaxially inserting the cartridge (14) into the aperture of the face, stabilizing the inserted cartridge with respect to the sleeve body (12), preferably by shrinking a tray provided as part of the cartridge (14) on the edges of the aperture in the plane, thereby forming a flange between the internal cartridge (14) and the plane of the sleeve body (12), and attaching a top to the other end of the cylindrical part by means of a flange, thereby forming the sleeve body (12), the top including a central opening for receiving a valve.
The constructional and functional characteristics of the aerosol spray can according to the present invention can be better understood with reference to the following detailed description, in which reference is made to the accompanying figures, which represent a preferred embodiment.
Brief description of the drawings
Figure 1 shows schematically, partly in perspective, the aerosol spray can or pressure can according to the present invention, in which a valve forming the cartridge activation device is embedded by way of example in its concave shape in its upper surface;
Figure 2 is a schematic, cut-away and partial view of the same aerosol spray can, to clearly show the connection between the valve lever and the cartridge;
Fig. 3 schematically shows, partly in perspective, the aerosol spray can or pressure can according to the present invention, in which the valve forming the cartridge activation device is embedded, by way of example, in its concave shape on its bottom surface;
Figure 4 is a schematic, exploded view of said valve lever coupled to a complementary sleeve for connection to the cartridge;
Figure 5 is a schematic representation, from the internal plane, of the valve lever and the sleeve of Figure 4 coupled to each other;
Figure 6 is a schematic, partly cross-sectional side view of the valve lever and the sleeve according to the previous figure.
Figure 7 is a schematic, partially sectioned side view of an aerosol spray can in accordance with the present invention.
Figure 8 is a schematic representation of a cross-section of detail A of Figure 7.
Detailed description
The present invention will be described in the following with regard to specific embodiments and with reference to certain illustrations; however, it is not limited to that, but is only limited by the claims. All illustrations described are only schematic and are non-limiting. In the illustrations, the size of some elements for illustrative purposes may be magnified and not drawn to scale. The dimensions and relative dimensions do not necessarily correspond to actual practical embodiments of the invention.
Furthermore, the terms first, second, third, and the like, in the description and claims, are used to distinguish between similar elements, and not necessarily to describe a sequential or chronological order. The terms are interchangeable under appropriate circumstances, and the embodiments of the invention may function in sequences other than described or illustrated herein.
Furthermore, the terms upper, lower, top, bottom, and the like are used in the description and the claims for descriptive purposes, and not necessarily to describe relative positions. The terms thus used are interchangeable under appropriate conditions, and the embodiments of the invention described herein may function in other orientations than described or illustrated herein.
The terms "comprising" and "including" used in the claims are inclusive or open, and do not exclude additional, non-enumerated elements, component components, or method steps. Therefore, the terms "comprising" and "including" include the more restrictive terms "consisting essentially of" and "consisting of".
Unless otherwise specified, all values specified herein are intended to include end points, and the values of the components or components are expressed in percentages or percentages by weight relative to each ingredient in the composition.
Furthermore, each component used herein can be discussed interchangeably as to its chemical formula, chemical name, abbreviation, etc.
In the context of the present invention, the terms "aerosol spray can", "pressure canister" and "pressure container" are used interchangeably, and they all mean a metal can that can be put under internal pressure and can be used to deliver various products.
Suitable products may have a low viscosity, such as at most 4000 mPa s at 20 ° C, preferably at most 1000 mPa-s, more preferably at most 500 mPa-s, even more preferably at most 100 mPa-s, even more preferably at most 50 mPa s, preferably at most 10 mPa-s, more preferably at most 5.0 mPa-s, even more preferably at most 1.50 mPa-s at 20 ° C, and these low-viscosity products can often sprayed, such as a body deodorant, a perfume, a hair spray, a hair coloring agent, an aqueous or water-based composition, a household product, a cosmetic product, a food product, a decorative product, or a technical product, a cleaning fluid, a lubricating oil, a bactericidal, a fungicide, an insecticide and the like.
Alternatively, suitable products may exhibit a high viscosity, such as at least 5,000 mPa-s at 20 ° C, preferably at least 10,000 mPa-s, more preferably at least 20,000 mPa-s, even more preferably at least 40,000 mPa-s -s, such as a polyurethane foam-forming (PU-foam-forming) composition, a silicone paste, an adhesive, or combinations thereof.
For example, the internal cartridge of the pressure can be stabilized or secured inside the container by bolting the cartridge into an opening in the bottom or top of the container, as disclosed in WO 84/01355, by means of a nut screwed over a threaded, outwardly projecting fitting of the cartridge, protruding through the opening and sealed by means of a gasket between the lower part of the cartridge and the inner surface of the wall of the container, around the opening where the cartridge is secured.
In another embodiment, similar to what is described in WO 85/00157 A1, the cartridge comprises a tray that is pinned or shrunk on the edges of the bottom or top surface of the container provided to form a flange, such as when a conventional valve is crimped on top of a container, and usually additionally sealed with a seal connection provided as part of the flange.
In an embodiment of the aerosol spray can or pressure can according to the present invention, the internal cartridge comprises a longitudinal body sealed at one end with a removable seal or removable cover, and connected at the other end to the top surface or bottom or bottom rear face of the sleeve, the cartridge further comprising a rod positioned within the longitudinal body and extending throughout the length of the cartridge, the rod being provided with an upper end adapted to be in loose engagement with a inner surface of the lid, and a lower end protruding beyond the top surface or the bottom or rear surface of the can body, and forming the molded tag (20) adapted to be coupled to the activation device (16)
In an embodiment of the sleeve in accordance with the present invention, a first elastic ring is provided between the cartridge cover and the cartridge body, this elastic ring being adapted to form a seal between the contents of the cartridge and the contents of the canister outside the internal cartridge.
In the embodiment of the aerosol spray can or pressure canister in accordance with the present invention with the rod in the cartridge, the rod extends axially, and concentrically with respect to the cartridge body, throughout the length of the cartridge.
In the embodiment of the aerosol spray can or pressure can according to the present invention with the rod in the cartridge, the rod is provided with lateral protrusions adapted to maintain the position of the rod relative to a cross-section of the cartridge, this cross-section perpendicular to the central axis of the cartridge body.
In the embodiment of the aerosol spray can or pressure canister in accordance with the present invention with the rod in the cartridge, the upper end of the rod comprises an external screw thread that engages a corresponding internal screw thread in the cartridge cover.
In the embodiment of the aerosol spray can or pressure can according to the present invention with the threaded engagement between rod and cover, the body and cover of the cartridge are provided with cooperating means that prevent the cover from rotating relative to the cartridge. Preferably, the longitudinal wall of the cartridge protrudes upwards with a segment of its circular cross-section, and the lid has a recess for receiving the protruding part of the wall of the cartridge. Preferably, the protruding segment of the longitudinal wall of the cartridge covers a greater distance than the axial contact surface between the cover and the wall of the cartridge. This feature ensures that rotation of the lid relative to the wall of the cartridge is prevented until the lid is pushed completely free of the cartridge body.
In the embodiment of the aerosol spray can or pressure can according to the present invention with the threaded engagement between the rod and the cartridge lid, the cartridge lid comprises a tubular protrusion that extends axially beyond the internal thread from the outer surface of the lid wherein the tubular protrusion is open at both ends and is adapted to co-operate with the upper end of the rod.
The inventors have found that the opening in the cartridge lid acts as a kind of "pressure relief hole" when the cartridge is opened. When the rod is rotated in the correct direction and the cartridge lid is pushed upwards, the lid only needs to move a small distance before the usually much higher pressure surrounding the cartridge can access the interior of the cartridge through the pressure relief hole . From that moment the first net power component described above has been removed.
The second net power component described above has also been removed. The opening in the cartridge lid through which the protrusion of the rod comes into contact with the contents of the container outside the cartridge reduces the surface area of the outer surface of the lid that is subject to the pressure in the container where the first component is located is located. For that amount of reduced area, thanks to the present invention of the pressure relief hole, the pressure in the container acts directly on the protrusion of the rod and not on the lid of the cartridge. This entails the advantage that the force required to push the cover away from the rod and from the cartridge, and thus to open the cartridge, can be reduced even more. Preferably, the amount of area by which the lid area is reduced represents at least 40% of the area of the underside of the lid of the cartridge occupied by the rod where the rod engages the inside of the lid, and where the pressure inside the cartridge cannot act on the inner surface of the cartridge lid. More preferably, the amount of area by which the lid area is reduced represents at least 50%, even more preferably at least 55%, even more preferably at least 60% of the area of the underside of the lid of the cartridge occupied by the rod. Applicants have found that this feature can lead to an additional significant reduction in the total force required to open the cartridge. The inventors have further established that this second advantage is already in force before the rod is rotated, and therefore already applies to the first rotational movement imparted to the rod in the cartridge.
The inventors have found that by providing the pressure relief hole, both the first net force component and the second net force component are removed from the force required to open the cartridge. The only net force component yet to be overcome before opening the cartridge could therefore be the bonding force of any cross-linked polymer present that has been formed by a premature reaction at the location between the lid, the cartridge wall and the first O-ring which provides the seal between the cartridge lid and the cartridge body wall.
In the embodiment of the aerosol spray can or pressure can according to the present invention with the threaded connection between the rod and the lid, the area of the underside of the lid of the cartridge occupied by the rod is calculated as the area of the cross section of the rod where the rod is provided with the external screw thread.
In the embodiment of the aerosol spray can or pressure can according to the present invention with the axial protrusion of the lid of the cartridge and of the rod, a recess is provided in at least one axial protrusion of the lid of the cartridge and of the rod, and A second elastic ring is provided in the recess adapted to provide a seal between the contents of the cartridge and the contents of the canister outside the internal cartridge.
The seal between the protrusion of the cartridge lid and the protrusion of the rod entails the advantage that the tight fit between the two protrusions becomes less crucial. This provides the advantage that the two cooperating elements, ie the cartridge seal or lid and the end of the rod, can be manufactured with a greater allowable deviation and less precision, whereby the production of these elements requires less skill and expertise. . As a result, these elements become more readily available from a larger number of possible sources, and can be offered in cheaper conditions.
In one embodiment of the aerosol spray can or pressure can according to the present invention, the recess in the protrusion of the cartridge or of the rod is circular.
In an embodiment of the aerosol spray can or pressure can according to the present invention, the second elastic ring is made of rubber.
In an embodiment of the aerosol spray can or pressure can according to the present invention, the second elastic ring is an O-ring.
In an embodiment of the method according to the present invention, the method further comprises the step, prior to coaxial insertion of the cartridge into the aperture of the face, of filling the cartridge with a second component and closing the cartridge with a lid.
In an embodiment of the method according to the present invention, the method further comprises the step of filling the can with a first component and closing the can with a valve, preferably by shrinking a tray, which is provided as part of the valve, on the edge of the opening in the top.
In an embodiment of the method according to the present invention, the method further comprises the step of injecting at least one propellant into the canister, wherein the propellant is preferably injected through the valve.
In an embodiment of the method according to the present invention, the method further comprises the step of connecting the sleeve to the molded appendix of the cartridge.
In an embodiment of the method according to the present invention, the method further comprises the step of connecting the circular core of the activation device to the sleeve.
In this document, the following reference numerals are used in association with the following corresponding elements: 10 aerosol spray can (or pressure canister) 12 can body 14 internal cartridge 16 activator (or valve lever) 18 sunken portion 20 shaped appendix 22 circular core 24 branch 26 recess (of the core) 26 'inner side surface (of the core) 28 circular crown 30 circular mouth 32 sleeve 34 upper part (of the sleeve) 36 protuberance 36' outer side surface (of the sleeve) 37 lower part (of the sleeve) 38 axially through hole ( of the sleeve) 40 cover (or seal) (of the cartridge) 42 rod 44 lateral protrusions (of the rod) 46 cartridge body 48 external thread (on the rod) 50 internal thread (in the cover) 52 tubular projection (of the cover ) 54 recess (in the rod or in the lid) 56 second elastic ring 58 first elastic ring
With reference to, initially, Figs. 1 to 3, the aerosol spray can with activating device that functions by movement in one direction according to the present invention, indicated in its entirety by the numeral 10 in Fig. 1, comprises a cylindrical can body 12 in which a cartridge 14, also cylindrical is coaxially inserted and stabilized in a known manner, said cartridge being coupled to a device for activating it or valve lever 16. The latter is accommodated in a recessed portion 18, which may be arranged along the outer surface of the body 12 1, or along the opposite bottom surface, as in FIG. 3. In both cases, the cartridge 14, as schematically shown as an example in FIG. 2, protrudes from the recessed portion 18 with a shaped appendix 20, which is the element for the its activation and the mandrel or shaft for connection to the valve lever 16.
According to the invention, the valve lever, which in the central part consists of the circular core 22 from which the two opposite branches 24 develop, is provided with a series of shaped recesses 26 with a substantially triangular shape, which are circulated along the internal side surface 26. extending from the core 22, as in Figure 4. The recesses 26 are preferably at equal distances and are arranged along the entire development of the inner side surface of the core 22, the inner diameter of which decreases and forms a circular mouth 30 which starts with a circular crown 28.
According to the preferred embodiment, as can be seen in Figure 4, the recesses 26 go deep into the core 22 until they reach the plane defined by said circular crown 28, and alternate with sections of the side surface 26 ".
The valve lever 16, which is advantageously made of plastic material, is coupled to a sleeve 32 made of the same material. The sleeve 32, shown in detail in the same Figure 4 and also visible in Figure 2 in the mounting position, with the lever 14 on one side and with the appendix 20 of the cartridge 14 on the other, comprises a substantially cylindrical body with two diameters, the upper part, indicated by the numeral 34, defining the smaller diameter which, subject to coupling clearance, corresponds to the diameter of the circular mouth 30 of the core 22. The lower part of the sleeve 32, indicated by the numeral 37, defines a diameter that is significantly larger in comparison with the upper part 34, and which is provided on the circumference with a plurality of equally spaced, pointed protrusions 36, complementarily formed and developed in the same direction as the formed recesses 26 provided on the core 22 of the valve lever 16. The height of said upper part 34 substantially corresponds to that of the inner side surface of the valve nd 30 of the core 22, while the diameter of the lower part 32, viewed relative to the side surface without the protrusions 36 and indicated by the number 36 ', subject to coupling clearance, is equivalent to that of the inner side surface 26' of the core 22.
The sleeve 32 is provided with an axially through hole 38 of square shape, and is sized to accommodate and stabilize, with negative play, the mandrel or shaft emerging from the cartridge 14 formed by the molded appendix 20.
As is particularly shown in Figure 2, the press-fit sleeve is mounted on said shaped appendix 20, which engages hole 38; the valve lever 16 is in turn suitably mounted on the sleeve 32 such that the protrusions 36 of the upper part of the sleeve 32 engage in the correspondingly formed recesses 26 of the core 22. This situation of an established coupling between the sleeve 32 and valve lever 16 is particularly visible in Figure 5, while in Figures 1 and 2, on the opposite branches 24 of valve lever 16, arrows are shown indicating the rotational movement to which the lever is to be subjected in order to activate the valve of the cartridge 14. In this specific case, that movement is carried out clockwise, which is indicated by the arrows. This makes it a rotation that is primarily suitable for people who normally / mainly use their right hand for the various movements that are connected to the most diverse activities. Any possible accidental movement, especially exerted by left-handed people, in the opposite direction, i.e. counterclockwise, would not cause damage in any way, since the valve lever 16 would rotate in freewheel condition; more specifically, the pointed protrusions 36 of the sleeve 32 would slide along the inner side surface 26 'of the core 22 without ever engaging the formed recesses 26. This freewheel rotation is made possible and facilitated by the slightest deflection of the plastic material from which the bulges 36 are formed.
Note that this structural device, with protrusions 36 and correspondingly shaped recesses 26, can advantageously be used on any type of two-component spray can, or even one-component spray can, of the known type, not only on those spray cans which are the subject of the above-mentioned exclusive rights of the applicant.
As can be seen from the above, the advantages of the invention are clear.
In the aerosol spray can according to this invention, the presence of the protrusions 36 of the sleeve 32, and of the complementarily shaped recesses 26 formed on the core 22 of the valve lever 16, leads to an engagement system that only allows rotation when the coupling between said two elements, and which also requires rotation to take place in a given direction, namely clockwise, to effect mixing of the two components.
The ability to inadvertently rotate the valve lever 16 in a direction opposite to the foreseen direction clockwise, without this leading to risks for the integrity or functionality of the aerosol spray can, is particularly advantageous.
Figure 7 shows diagrammatically, in side view and partly in section, an aerosol spray can 10 in accordance with the present invention. Figure 7 illustrates how the bottom or rear of the bus body 12 forms a recessed portion 18 with a central opening in which an internal cartridge 14 is stabilized. The cartridge 14 has a cartridge body 46 and is closed at its upper end with a lid 40. Inside the cartridge 14 is a rod 42 which extends the entire length of the cartridge 14. The lower end of the rod protrudes beyond the rear surface of the bushing body and forms the formed appendix 20. On this formed appendix 20 is provided the activation device 16, which comprises a circular core 22 and opposite branches 24. The activating device and the stabilizing connection between the cartridge 14 and the recessed part 18 of the can body are only partially shown in section in figure 7. Figure 7 shows a detail A which can be seen in figure 8.
Figure 8 is a schematic representation of a cross-section of detail A of Figure 7. Figure 8 shows how the lid 40 seals the cartridge by partially fitting into the cartridge body 46. The lid is provided with a recess in which a first O-ring is provided for forming a seal, to prevent the contents of the cartridge from leaking between the cartridge body and the lid of the cartridge, and possibly coming into contact with the environment of the cartridge, as long as the cover is correctly positioned on the cartridge body, as shown in Figure 8.
Figure 8 further shows the engagement between the rod 42 and the lid of the cartridge 40 in accordance with the present invention. The rod 42 includes an external thread 48 in engagement with a corresponding internal thread 50 provided as part of the lid 40. The lid 40 has a tubular protrusion 52 that extends axially from the outer surface of the lid, beyond its internal thread. The tubular protrusion is open at both ends, and the upper end of the rod 42 extends into the tubular protrusion 52 of the lid. The outer end of the rod 42 includes a circular recess 54 into which a second O-ring 56 fits, to form a seal that prevents the contents of the cartridge from leaking between the upper end of the rod and the tubular protrusion of the lid as long as the cover and the rod are correctly positioned, as shown in Figure 8.
Also shown in Figure 8 are lateral protrusions 44 provided for maintaining the position of the rod relative to the cartridge body, in particular in the central position of the cartridge.
Now that this invention has been fully described, it will be apparent to those skilled in the art that the invention can be implemented within a wide range of parameters within what is claimed herein, without departing from the scope of the invention as defined by the claims.

权利要求:
Claims (22)
[1]
Conclusions
An aerosol spray can or pressure canister (10), in particular of the two-component type, with activation device for activating the internal cartridge (14), comprising a can body (12) into which the cart ridge (14) is inserted coaxially and on a known is stabilized, the cartridge being coupled to a cartridge activation device, the activation device comprising a valve lever (16) housed in a recessed portion (18) of the top surface or the bottom surface of the body (12) from which the cartridge itself projects with a molded appendix (20) which forms the shaft for connection to the valve lever (16), the valve lever having a central portion and defining a circular core (22) in the central portion from which the two opposed lever branches (24) protrude, the inner diameter of the circular core decreasing to form a circular mouth (30) starting from a ci Circular crown (28), characterized in that the activating device functions by rotating movement in one direction in that the valve lever, in the central part consisting of the core (22), is provided with a series of shaped indentations (26) which extend at least partially circumferentially along the internal side surface (26 ') of the core and are intended to cooperate with complementary protrusions (36) extending on at least one portion of the circumference of a sleeve (32) engaged in the circular mouth (30) and is connected to the molded appendix (20) of the cartridge (14).
[2]
The sleeve according to claim 1, characterized in that the protrusions (36) of the sleeve (32) engage with the formed recesses (26) and, just like the latter, define clockwise rotation which applies a rotation to the right to the valve lever (16) to activate the cartridge (14) starting from its formed appendix (20).
[3]
The bush according to claim 1 or 2, characterized in that the sleeve (32) consists of a substantially cylindrical body with two different diameters, the upper part (34) defining the smaller diameter corresponding to the diameter of the circular mouth (30) of the core (22), while the lower part (37) defines a larger diameter at the circumference is provided with the plurality of protrusions (36), the height of the upper part (34) of the sleeve (32) substantially corresponds to that of the inner side surface (26 ') of the core (22).
[4]
The sleeve according to the preceding claim, characterized in that the diameter of the outer side surface (36 ') without the bulges (36) of the lower part of the sleeve (32) is substantially equivalent to that of the inner side surface (26) ') from the core (22).
[5]
The can according to any of the preceding claims, characterized in that the sleeve (32) is provided with an axially through hole (38) sized to accommodate and stabilize the molded appendix (20) extending from the cartridge (14).
[6]
The can according to any of the preceding claims, characterized in that the shaped recesses (26) define a substantially triangular shape and are equally spaced.
[7]
The can according to any of the preceding claims, characterized in that the formed recesses (26) are arranged along the entire development of the inner side surface (26 ') of the core (22).
[8]
The can (10) according to any of the preceding claims, wherein the internal cartridge (14) comprises a longitudinal body (46) sealed at one end with a removable seal or removable cover (40), and on the other end is connected to the top surface or the bottom or rear surface of the sleeve (10), the cartridge (14) further comprising a rod (42) positioned within the longitudinal body (46) and extending throughout the entire length of the cartridge (14), wherein the rod (42) is provided with an upper end adapted to be in loose engagement with an inner surface of the cover (40), and a lower end protruding beyond the upper surface or the bottom or rear surface of the can body (12), and forms the molded tag (20) adapted to be coupled to the activation device (16).
[9]
The can according to claim 8, wherein a first elastic ring (58) is provided between the cartridge cover (40) and the cartridge body (46), said elastic ring being adapted to form a seal between the contents of the cartridge (14) and the contents of the canister (10) outside the internal cartridge (14).
[10]
The can according to claim 8 or 9, wherein the rod (42) extends axially, and concentrically with respect to the cartridge body (46), throughout the length of the cartridge (14).
[11]
The can according to any of claims 8 to 10, wherein the rod (42) is provided with lateral protrusions (44) adapted to maintain the position of the rod relative to a cross-section of the cartridge (14) wherein this cross-section is taken perpendicular to the central axis of the cartridge body (46).
[12]
The can of any one of claims 8 to 11, wherein the upper end of the rod (42) comprises an external thread (48) that engages a corresponding internal thread (50) in the lid (40) ) of the cartridge (14).
[13]
The can according to any of claims 8 to 12, wherein the cartridge body (46) and the lid of the cartridge (40) are provided with cooperating means that prevent the lid (40) from rotating relative to the cartridge body (46).
[14]
The can according to claim 12 or 13, wherein the cartridge cover (40) comprises a tubular protrusion (52) that extends axially from the outer surface of the lid beyond the internal thread (50), the tubular protrusion on both ends is open and adapted to cooperate with the upper end of the rod (42).
[15]
The can according to claim 14, wherein a recess (54) is provided in at least one axial protrusion (52) of the cover of the cartridge (40) and of the rod (42), and a second elastic ring (56) is provided in the recess (54) and is adapted to provide a seal between the contents of the cartridge (14) and the contents of the can (10) outside the internal cartridge (14).
[16]
The can according to claim 15, wherein the recess (54) is circular.
[17]
The can according to claim 15 or 16, wherein the second elastic ring (56) is made of rubber.
[18]
The sleeve of any one of claims 15-17, wherein the second elastic ring (56) is an O-ring.
[19]
A method of manufacturing the sleeve (10) according to any of the preceding claims, comprising the steps of folding a rectangular metal plate into a cylinder and welding two sides of the metal plate around the cylindrical part of the can body (12), attaching a concave face to one end of the cylindrical member by means of a flange, thereby forming the recessed portion (18), the face comprising a central aperture for receiving a cartridge (14), coaxially inserting the cartridge (14) into the aperture of the face, stabilizing the inserted cartridge relative to the sleeve body (12), preferably by shrinking a tray provided as a part of the cartridge (14) on the edges of the aperture in the face, thereby forming a flange between the internal cartridge (14) and the face of the can body (12), the cartridge having the formed aa The jaw (20) protrudes from the concave surface, and a flange securing a top to the other end of the cylindrical portion, thereby forming the sleeve body (12), the top including a central opening for receiving a valve, the method further comprising the steps of connecting the sleeve (32) to the molded appendix (20) of the cartridge (14), and connecting the circular core (22) of the activator (16) ) with sleeve (32).
[20]
The method of the preceding claim, further comprising the step, prior to coaxially inserting the cartridge into the aperture of the face, of filling the cartridge (14) with a second component and closing the cartridge with a lid (40).
[21]
The method of claim 19 or 20, further comprising the step of filling the canister with a first component and closing the canister with a valve, preferably by shrinking a tray provided as part of the valve, on the edge of the opening in the top.
[22]
The method of any one of claims 19 to 21, further comprising the step of injecting at least one propellant into the canister, wherein the propellant is preferably injected through the valve.

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EP3250478B1|2020-05-13|

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SI3250478T1|2020-09-30|

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WO2016120336A1|2016-08-04|

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BE1023387A1|2017-03-01|

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RU2692992C9|2019-08-19|

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HUE051149T2|2021-03-01|

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EP3250478A1|2017-12-06|

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ITMI20150015U1|2016-07-28|

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RU2017129395A|2019-02-20|

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RU2017129395A3|2019-05-13|

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PL3250478T3|2020-10-19|

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RU2692992C2|2019-06-28|

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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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ITMI2015U000015|2015-01-28|

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ITMI2015U000015U|ITMI20150015U1|2015-01-28|2015-01-28|AEROSOL CYLINDER WITH UNIDIRECTIONAL HANDLING DEVICE|

---