Closure device in the form of a cap for fluid-tight sealing of a nozzle and system with a closure device and a nozzle

Abstract

Closure device (1) in the form of a cap (2) with at least one lower opening (2.1) for releasably fluid-tight closing of a nozzle (3) with at least one inlet opening (4) and at least one outlet opening (4.1) for a fluid (5), wherein the nozzle (3) can be fluidically connected via the inlet opening (4) to a cartridge (6) filled with the fluid (5), wherein the cap (2) closes the nozzle (3) connected to the cartridge (6) and the outlet opening (4.1) when the nozzle (3) is closed.1) the nozzle (3) completely and the inlet opening (4) of the nozzle (3) at least partially encompasses such that the cap (2) seals fluid-tight in the region of the inlet opening (4) of the nozzle (3) by contacting the cartridge (6), characterized in that the cap (2) is lined in its interior at least partially with a filler (8), wherein the nozzle (2) can immerse itself at least partially into the filler (8) when the nozzle (2) is closed with the cap (2), and in that a compression element (10) functionally connected to the filler (8) and the nozzle (3) is arranged in a starting position (10.1) in the region of the lower opening (2.1) of the cap (2) such that when the nozzle (3) immerses itself in the filler (8), the nozzle (3) at least partially penetrates the compression element (10) and, upon immersion of the nozzle (3) into the filler (8), the compression element (10) from the starting position (10.1) to a position different from the starting position (10.1) different displacement position (10.2) can be guided inside the cap (2), with compression of the filler (8) above the compression element (10) providing support.

Description

[0001] The present invention relates to a closure device in the form of a cap with at least one lower opening for releasably and fluid-tightly closing a nozzle having at least one inlet opening and at least one outlet opening for a fluid, wherein the nozzle can be fluidically connected to a cartridge filled with the fluid via the inlet opening, wherein the cap, when closing the nozzle connected to the cartridge, completely surrounds the outlet opening of the nozzle and at least partially surrounds the inlet opening of the nozzle such that the cap seals fluid-tightly in the region of the inlet opening of the nozzle by bearing against the cartridge, according to the preamble of claim 1, and a closure system for fluid-tightly closing a nozzle which is fluidly connected to a cartridge, comprising a closure device according to the invention in the form of a cap and a nozzle according to the preamble of claim 8.

[0002] Numerous sealing devices are already known in the art for closing opened cartridges filled with fluid, and for closing open cartridges filled with fluid that are fluidically connected to a nozzle. Among DIY enthusiasts, it is also common to close the nozzles attached to opened cartridges by screwing a screw or inserting a dowel into the nozzle's outlet opening. Closing the nozzle with a nail or adhesive tape is also known. Furthermore, a commercially available screw protector is known, which, when screwed into the nozzle, is intended to extend the usable life of partially used cartridges.

[0003] From DE 20 2015 002 988 U1, a reusable sealing cap for sealing opened cartridges is known. A fluid-tight seal of a nozzle connected to the cartridge, which is described as a silicone tip (nozzle), is not provided and cannot be achieved by directly placing the sealing cap on the cartridge, since the silicone tip must first be removed.

[0004] DE 10 2008 007 306 A1 relates to a dispensing device for plastic materials, which has a closure device at the tip of an application nozzle with a pin and a cap movable relative to it, with a closure opening. The pin is designed to be reduced in size by its shape until it forms a sealing closure. In practice, however, it has been found that sealing the closure opening with the pin is insufficient to permanently prevent, for example, the hardening of the fluid remaining in the application nozzle, such as acrylate or silicone.

[0005] German patent DE 1 969 045 discloses a cap with which a nozzle-shaped dispensing tip attachable to a cartridge can be securely fastened to prevent the material in the dispensing tip from hardening during temporary work interruptions. In practice, such a cap has proven unsuitable for permanently protecting the material in the dispensing tip and the cartridge from hardening.

[0006] A closure cap for repeatedly closing containers with contents susceptible to drying out, oxidation, or perishability is already known from DE 10 2005 034 676 B3. To protect the contents, the closure cap has one or more absorbent elements with free surfaces inside, which are filled with one or more gas-producing substances suitable for suppressing drying out, oxidation, or bacterial contamination of the contents.

[0007] DE 10 2017 109 255 A1 discloses a cap attached to the external thread of a discharge tube extending from the interior of a cartridge, wherein the front (upper) part of the cap is filled with polystyrene or foam. The cap has two wings, allowing it to be easily unscrewed from the discharge tube like a wing nut. The cap also has lateral openings. This design allows the interior of the cartridge to be sterilized by ethylene oxide.

[0008] DE 41 25 987 A1 relates to a screw cap for a bottle with an external thread at its neck and a dispensing opening formed in the neck. The bottle fitted with the screw cap is opened by breaking off the closure tip from the ring cap and pulling it off the dispensing tip. The ring cap remains on the bottle and holds the dispensing tip securely in the dispensing opening.

[0009] German patent DE 40 05 528 A1 discloses a discharge device for flowable and similar media, which may be gaseous, liquid, pasty, powdery, or the like. The discharge device has a spherical valve body that is held in the closed position by a spring-loaded detent. At a predetermined discharge pressure, the valve body is released from the detent position and, like a piston, moved into a sealed receiving chamber, where it is locked in place. This creates a single-use closure of the discharge channel, which is very simple in design and reliable in its operation.

[0010] Finally, an applicator with a replaceable container is known from DE 10 2006 018 827 A1. A cartridge can be attached to the front end of a housing via an adapter. The end of the cartridge facing the applicator has an opening for filling the cartridge, which is closed by a piston when ready for use. The other end of the cartridge tapers to a nozzle, which is closed by a cap.

[0011] The disadvantages of known sealing devices are that they do not offer sufficient protection against the escape or ingress of fluid, nor against the hardening or oxidation of fluid, either from or into the nozzle or from or into the cartridge fluidically connected to the nozzle. Furthermore, they are cumbersome to handle, for example, due to the need for constant refilling with an absorbent substance. In addition, the insufficient protection against hardening or oxidation of fluid in the nozzle means that it must be replaced with a new one repeatedly.Furthermore, with known sealing solutions that only provide for closing the nozzle outlet, there is the problem that when the nozzle is connected to an open cartridge, a plug forms in the area of ​​the connection between the nozzle and the cartridge, which is filled, for example, with a fluid in the form of a sealant, such as acrylate or silicone, or in the form of an adhesive, which prevents further use of the cartridge when work is resumed, so that the cartridge with the fluid remaining below the plug has to be disposed of. Disclosure of the invention

[0012] The object of the invention is to improve, at least partially, the closure devices known from the prior art. In particular, the object of the present invention is to design a closure device for a cartridge with a fluidically connected nozzle in such a way that sufficient and lasting protection against the escape or ingress of a fluid into the cartridge or the nozzle can be ensured, thus preventing the hardening or oxidation of the fluid in the system consisting of the cartridge and the connected nozzle. Furthermore, the design of the closure device should lead to a reduction in avoidable waste products compared to closure devices known from the prior art.

[0013] The foregoing problem is solved by a closure device in the form of a cap with the features of claim 1 and by a closure system for fluid-tight sealing of a nozzle which is fluidically connected to a cartridge, with the features of claim 10. Further advantages, features and details of the invention will become apparent from the dependent claims, the description and the drawings.

[0014] The closure device according to the invention, in the form of a cap with at least one lower opening for releasably sealing a nozzle with at least one inlet opening and at least one outlet opening for a fluid, wherein the nozzle can be fluidically connected to a cartridge filled with the fluid via the inlet opening, wherein the cap completely surrounds the outlet opening of the nozzle and at least partially surrounds the inlet opening of the nozzle when the nozzle is closed, such that the cap seals fluid-tight in the area of ​​the inlet opening of the nozzle by contacting the cartridge, includes the technical teaching that the cap is lined at least partially inside with a filler, wherein the nozzle can immerse at least partially in the filler when the nozzle is closed with the cap.and that in the area of ​​the lower opening of the cap, a compression element is arranged in a starting position, functionally connected to the filler and the nozzle, such that when the nozzle is immersed in the filler, the nozzle at least partially penetrates the compression element and, with the immersion of the nozzle in the filler, the compression element can be moved from the starting position to a displacement position inside the cap that differs from the starting position, whereby compression of the filler above the compression element is supported.

[0015] For the purposes of this invention, the term "fluid" or "fluids" refers to gases, liquids, plasma, suspensions, and aerosols. In addition to viscoelastic substances such as sealants, for example silicone or acrylate, the term "fluid" is also intended to include, among other things, adhesives, food, nutritional supplements, fats, emulsions, creams, and animal feed.

[0016] According to the present invention, a “fluidic connection”, for example one between a cartridge and a nozzle connected thereto, should technically enable the fluid to escape from the cartridge into the nozzle.

[0017] In contrast, for the purposes of the present invention, the term "fluid-tight" shall be understood to mean that neither a fluid can penetrate into the cap and the cartridge fluidically connected to the cap, nor can a fluid escape from the aforementioned system.

[0018] For the purposes of the present invention, a "cartridge" is understood to be a container in which a fluid is held. The container must have or permit at least one technical configuration to which a nozzle can be connected directly or indirectly via a connecting piece. In this case, the optional connecting piece becomes part of the system described above.

[0019] The closure device according to the invention, designed in the form of a cap, solves the aforementioned problem in that the cap completely encloses the nozzle when closing, both by overlapping the outlet opening and by overlapping the inlet opening, and is sealed fluid-tight by contact with the cartridge, whereby a fluid cannot enter or escape from the aforementioned system either via the fluid connection between the cartridge and the nozzle in the area of ​​the nozzle's inlet opening or via the nozzle's outlet opening, i.e., that the cap hermetically seals the nozzle.Due to the inventive design of the cap, which completely surrounds the nozzle and hermetically seals against the cartridge, the fluids in the cartridge and the fluids in the nozzle can be effectively prevented from outgassing, oxidation and thus from changes such as hardening, or at least suppressed to such an extent that when work is restarted, both the fluid remaining in the cartridge can still be used and the nozzle does not need to be cleaned or replaced, so that waste products can be effectively reduced by the design of the closure device according to the invention.

[0020] Preferably, when the nozzle on the cartridge is closed, the cap extends beyond the nozzle's inlet opening, through which the nozzle is fluidly connected to the cartridge, in the region of its lower opening, such that the cap seals fluid-tight against the cartridge. The upper section of the cartridge can advantageously be formed by a shoulder of the cartridge, against whose surface the cap rests, at least fluid-tight, or is supported by the shoulder of the cartridge. Even more preferably, the cap extends beyond at least an upper section of a cartridge surface and seals fluid-tight against the cartridge surface.

[0021] Advantageously, the cap can be detachably attached to the nozzle in the area of ​​the fluid connection between the cartridge and the nozzle inlet opening for repeated hermetic sealing. For this attachment, at least the cap has fastening means by which it is securely held in the aforementioned system in the area of ​​the fluid connection between the cartridge and the nozzle inlet opening. Alternatively, the cap can be detachably attached to the nozzle. For this alternative attachment method, engagement elements are advantageously designed or arranged inside the cap, which interact with engagement elements designed or arranged on the nozzle to form a fastening system such that the cap can be repeatedly and detachably attached to the nozzle.A click-lock fastener can serve as a fastening system, in which, for example, a first engagement element in the form of a bead, ring, or groove is formed radially around the outer wall of the nozzle, at least in sections, and in which a second engagement element in the form of a bead, ring, or groove, also at least in sections, is formed radially around the inner wall of the cap such that the second engagement element can be guided over the first engagement element under force, for example, by pressure on the cap, and after being guided over the first engagement element, the second engagement element is held in place by shearing. The connection between the first and second engagement elements can be released by overcoming the shear forces, for example, by pulling on the cap.The first engagement element can alternatively be an external or internal thread, which interacts functionally with the second engagement element, also an internal or external thread. In this case, the cap is turned relative to the nozzle, for example clockwise to attach it to the nozzle, or counterclockwise to detach the cap from the nozzle.

[0022] In a further advantageous embodiment, the cap can be detachably attached to the cartridge wall. In the case of conventional cartridges for sealants or adhesives, these have a cylindrical outer surface. A first engagement element in the form of a bead, a ring, or a groove can be formed radially around at least part of the cartridge's outer surface, and a second engagement element in the form of a bead, ring, or groove, also radially around the inner wall of the cap, is configured such that the second engagement element can be guided over the first engagement element under force, for example, by pressure on the cap, and after being guided over the first engagement element, the second engagement element is held in place by shear force against the first engagement element.By overcoming the shear forces, for example by pulling on the cap, the connection between the first and second engagement elements can be released. The first engagement element can alternatively be an external or internal thread, which interacts with the second engagement element, also an internal or external thread. In this case, the cap is turned relative to the cartridge, for example clockwise, to attach it to the cartridge, or counterclockwise to detach it.

[0023] According to the invention, the interior of the cap is lined, at least partially, with a filler such that the fluid volume of the cap is reduced by displacement through the filler. Advantageously, the nozzle can immerse itself, at least partially, into the filler or filler body when the cap is closed. Immersion of the nozzle into the filler can be advantageously facilitated by insertion aids in the form of incisions or recesses in the filler body. Preferably, the filler contained in the cap is an open-cell and even more preferably a closed-cell foam. The filler can consist of the following non-exhaustive group of materials: thermoplastic elastomers (TPE), ethylene propylene diene monomer rubber (EPDM), natural or cellular rubber, thermoplastic foams (e.g., polystyrene (PS-E), polypropylene (PP-E), and polyvinyl chloride (PVC-E)), elastomeric foams (e.g.,Polyurethane (PUR) flexible foam and acrylonitrile butadiene rubber (NBR) or thermosetting foams (e.g., PUR rigid foam or phenolic resins), etc. The filler serves, among other things, to reduce the gas volume inside the cap, so that simply by lining the cap with the filler, oxidative processes caused by the air present in the cap interacting with the fluid in the nozzle and cartridge can be reduced.

[0024] According to the invention, the volume lining the cap with the filler is variable. Preferably, this volume is variable by compressing the filler or filler body, particularly by applying force, preferably by pressure to the filler. The pressure advantageously arises when the nozzle is immersed in the filler, whereby the filler, as a result of displacement by the volume of the nozzle section immersed in the filler, can advantageously be reduced by the volume of the nozzle section immersed in the filler.This offers the advantage that, regardless of the nozzle length, the filler is always compressed by the nozzle section immersed in the filler to such an extent that the nozzle outlet is always surrounded by compressed filler when the cap is closed, thus minimizing the amount of fluid surrounding the outlet in the cap.

[0025] According to the invention, a compression element, functionally connected to the filler and the nozzle, is arranged in a starting position in the region of the lower opening of the cap. When the nozzle is immersed in the filler, it advantageously extends at least partially through the compression element, allowing the compression element to be moved from its starting position to a different position inside the cap. The compression element, which is located radially around the nozzle at least partially, advantageously supports not only the compression of the filler caused by the volume displacement through the inserted nozzle, but also the compression of the filler above the compression element.Furthermore, the compression element can also serve as a fluid-tight seal for the section of the cap lined with the filler, thereby helping to prevent fluid from escaping from the nozzle outlet or from entering the outlet. In a particularly preferred embodiment, the compression element can have fluid-permeable openings such that the fluid exiting the filler during compression can escape through these openings, which are permeable in at least one direction, in the opposite direction to the nozzle's immersion into the filler.

[0026] According to the invention, by guiding the compression element from its initial position to a different displacement position, the filler, particularly in the area of ​​the nozzle outlet, can be adjusted to a minimal filler volume surrounding the outlet. The increased compression in the area of ​​the nozzle outlet has the advantage that the fluid present in the pores of the filler, which is, for example, an open-pore foam, particularly air, is forced out of the pores when the filler is compressed.Thus, it can be ensured that when closing with the closure device according to the invention, as the tip is immersed into the cap lined with the filler material and simultaneously compressed by the compression element, the gas volume, namely air in particular, which leads to oxidative processes with the fluid in the nozzle, is present in a minimal volume or even completely excluded, i.e., completely expelled from the filler material. The movement of the compression element through the nozzle, which tapers conically upwards from the inlet opening to the outlet opening and is sold with the commercially available cylindrical cartridges from hardware stores, is independent of their length. In this way, it can be ensured that the outlet opening of the nozzle is always enclosed by the filler material compressed by the compression element and / or by the immersion of the nozzle.the tip of the nozzle is enclosed by filler inside the cap.

[0027] Another aspect of the invention is a sealing system for fluid-tightly sealing a nozzle that is fluidically connected to a cartridge, comprising a sealing device according to the invention in the form of a cap and a nozzle. The sealing system incorporates the technical teaching that the cap and the nozzle have interacting engagement elements such that the cap can be detachably attached to the nozzle via these interacting engagement elements. As already described for the sealing device, the interacting engagement elements can, for example, form a screw or click connection. Since, in the case of a special embodiment of a nozzle with engagement elements, this nozzle differs from commercially available nozzles, the special design of the nozzle according to the invention can be used as a unique selling point for sales purposes.

[0028] Finally, another aspect of the invention is a method for fluid-tight sealing of a nozzle which is fluid-technically connected to a cartridge, using the sealing device or sealing system according to the invention, namely by placing a cap on the nozzle, wherein the cap seals both the outlet opening and the inlet opening of the nozzle in a fluid-tight manner by contacting the cartridge wall.

[0029] In order to avoid repetition regarding the advantages of the closure device, the closure system and the method for fluid-tight closure of a nozzle according to the invention, reference is made to the description of the advantageous embodiments of the closure device according to the invention and full reference is made to the disclosure by this description and vice versa. Preferred embodiments:

[0030] Further measures improving the invention are described in more detail below with reference to the figures and preferred embodiments of the invention. The features mentioned in the claims and in the description can be essential to the invention individually or in any combination. It should be noted that the embodiments shown in the figures are for descriptive purposes only and are not intended to limit the invention in any way.

[0031] They show: Fig. 1 a closure device according to the invention in the form of a cap with engagement elements for attaching the cap to a nozzle in a sectional view, Fig. 2 the locking device Fig. 1, which is attached to a nozzle connected to a cartridge, Fig. 3 a closure device according to the invention in the form of a cap with engagement elements for attaching the cap to a cartridge in a sectional view, Fig. 4 the locking device Fig. 2, which is attached to a cartridge which is fluidically connected to a nozzle, Fig. 5 a closure device according to the invention in the form of a cap, which is lined section by section with a filler, in a sectional view, and Fig. 6 the cap lined with filler made of Fig. 5 with nozzles of different lengths immersed in the filler,

[0032] In the different figures, identical parts are always marked with the same reference symbols, which is why they are usually only described once.

[0033] Fig. 1 and Fig. Figure 2 shows a sectional view of a closure device 1 in the form of a cap 2. The cap 2 is adapted to the contour of the nozzle 3 and has a lower opening 2.1 through which the cap 2 can be placed over or guided onto the nozzle 3. In the area of ​​the opening 2.1, engagement elements 20 are formed around the opening 2.1, which serve for attachment to the nozzle 3, wherein the engagement elements 20 interact operatively with engagement elements 30 formed on the nozzle 3 (see Figure 2). Fig. 2) that the click connection formed by the design of the engagement elements 20 and 30 allows repeated attachment of the cap 2 to the nozzle 3 and repeated closure of the nozzle 3 with the cap 2. Contrary to the illustration, the releasable fastening device between the cap 2 and the nozzle 3 can also be designed as a screw connection or another fastening technique. In the present case, the engagement elements 20 and 30 are designed to form a click connection in the lower area of ​​the cap 2 and in the area of ​​the inlet opening 4 of the nozzle 3. Contrary to the illustration, the releasable fastening device between the cap 2 and the nozzle 3 can be positioned in the direction of the outlet opening 4.1 of the nozzle, since the fastening between the cap 2 and the nozzle 3 is not essential for the technical solution according to the invention, which provides that the cap 2 is used to close the nozzle 2, or rather, to close the nozzle 3.To close the fluidically connected system consisting of cartridge 6 and nozzle 3, the cap 2 encompasses both the outlet opening 4.1 and the inlet opening 4 of the nozzle 3, and thereby seals the fluidically connected system consisting of cartridge 6 and nozzle 3 in the area of ​​the inlet opening 4 of the nozzle 3 by contacting the cartridge 6, such that the ingress of fluid into the cap or the system and the escape of fluid 5 (schematically represented by circles in the following figures) from the cap or the system are prevented. A sealing ring 2.2 is shown in the figures in the area of ​​the lower opening 2.1 of the cap 2 is arranged, which, when the cap 2 is placed against the cartridge 6, is at least slightly compressed between the upper wall or wall of the cartridge and the wall or wall of the cap, thus providing an additional optional safeguard for a fluid-tight seal. However, the sealing ring 2.2 can also be omitted, at least by selecting the appropriate material for the cap 2 or by ensuring the dimensional accuracy between the cartridge 6 and the cap 2, in order to guarantee a fluid-tight seal of the cap 2 by at least partial contact with the cartridge 6. An additional ring seal (not shown in the figure) could be arranged directly at the fluid connection between the nozzle 3 and the cartridge 6, whereby, for example, when the nozzle 3 is screwed onto a threaded connection of the cartridge 6, the ring seal is compressed between the nozzle 2 and the threaded connection of the cartridge 6.In conjunction with an airtight cap 2, which can be placed on the outlet opening 4.1 of the nozzle 3 and which only partially surrounds the inlet opening 4 of the nozzle 3, the cap 2, in conjunction with the aforementioned ring seal which rests against the cartridge opening, seals the nozzle 3 and the system consisting of nozzle 3 and cartridge 6 in a fluid-tight manner. Fig. Figure 2 shows a aforementioned system consisting of a cartridge 6 and a nozzle 3, wherein the nozzle 3 is connected to a cartridge 6. In the illustration in Fig. 2. In the following figures, no fluid connection has yet been established between the cartridge 6 and the nozzle 3. The nozzle 3 is screwed onto the cartridge 6 via an internal thread in the usual manner. The fluid connection between the cartridge 6 and the nozzle 3 is established in the usual manner by breaking the cartridge 6 in the area of ​​its external thread. Therefore, the Fig. The system shown in Figure 2, consisting of nozzle 3, cartridge 6, and cap 2, serves as a model for a sales variant. However, regardless of the fact that no fluid connection has yet been established between the nozzle 2 and the cartridge 6, the cap 2 already rests fluid-tight against the wall of the cartridge 6 via its lower shoulder area 2.3, which is shaped around the lower opening 2.1, and the upper shoulder area 6.2 of the cartridge 6. Additionally, the cap 2 is attached to the nozzle 3 via the fastening system with the functionally interacting engagement elements 20 and 30.

[0034] You Fig. 3 and Fig. Figure 4 shows a sectional view of a closure device 1 in the form of a cap 2. The cap 2 has a lower opening 2.1 through which the cap can be placed over a nozzle 3. In contrast to the opening shown in the Fig. 1 and Fig. 2 In the closure device 1 shown, the engagement elements 20 are designed below opening 2.1, which serve for attachment to the cap 2 and to the outer wall 6.1 of the cartridge 6, in this case a cylindrical surface of the cartridge 6, wherein the engagement elements 20 interact functionally with engagement elements 30 designed on the cartridge 6 (see Figure 2). Fig. 4) that the click connection formed by the design of the engagement elements 20 and 30 allows repeated attachment of the cap 2 to the cartridge 6 and repeated closing of the nozzle 3 with the cap 2. Contrary to the illustration, the releasable attachment between the cap 2 and the cartridge 6 can also be designed as a screw connection or in the form of another fastening technique, since here too the attachment between the cap 2 and the cartridge 6 is not essential for the technical solution according to the invention, which provides that the cap 2, for closing the nozzle 2 or, respectively, for closing the fluidically connected system of cartridge 6 and nozzle 3, covers both the outlet opening 4.The cap 2 encompasses both the inlet opening 4 of the nozzle 3 and the inlet opening 4 of the nozzle 3, with the cap 2 sealing the fluid-technically connected system of cartridge 6 and nozzle 3 in the area of ​​the inlet opening 4 of the nozzle 2 by contacting the wall or outer surface of the cartridge 6 in such a fluid-tight manner that the ingress of fluid into the cap 2 or the system and the escape of fluid from the cap 2 or the system are prevented. Fig. Figure 4 shows a aforementioned system consisting of a cartridge 6 and a nozzle 3, wherein the nozzle 3 is connected to a cartridge 6. In the illustration in Fig. 4 A fluid connection is established between the cartridge 6 and the nozzle 3, whereby the fluid 5 contained in the cartridge 6 can flow or be forced into the nozzle 2 via the inlet opening 4 of the nozzle 2 through the fluid connection between the nozzle 2 and the cartridge 6 and can exit from the outlet opening 4.1 of the nozzle 2 during operation.

[0035] The Fig. 5 and Fig. Figure 6 shows a closure device 1 according to the invention in the form of a cylindrical cap 2 with a shaped shoulder area 2.3 for abutting a cartridge 6, each in a sectional view. The cap 1 is lined section by section with a filler 8. In this case, the cap 2 is closed via the opening for the Fig. 1 and Fig. The fastening system described in section 2 is attached between the cap 2 and the nozzle 3 to the nozzle 3. Contrary to the illustration, the cap 2 can also be attached to the cartridge 6, as for the embodiment shown in the Fig. 3 and Fig. 4 described. Fig. Figure 6 shows a working position of the filler 8, which is compressed by the immersion of the nozzle 3 into the filler 8, whereby, regardless of the length of the nozzle 3, the outlet opening of the nozzle 3 is surrounded by or immersed in the compressed filler 8. In addition to the immersion of the nozzle 3 into a space in the Fig. In the insertion aid 3.1 shown in section 5, in the form of incisions or recesses in the filler, the compression of the filler is supported by a compression element 10 in the form of a ring, through which the nozzle 3 engages. In the Fig. In position 5, the compression element 10 is in a starting position 10.1, from which, as the nozzle 3 is immersed in the filler 8, the compression element 10 is moved to a displacement position 10.2 inside the cap 2, which differs from the starting position 10.1. By moving the compression element 10 from the starting position 10.1 to the displacement position 10.2, the filler 8 in the region of the outlet opening 4.1 of the nozzle 3 is adjusted to a minimum filler volume surrounding the outlet opening 4.1, partly due to the pressure exerted on the filler 8 by the compression element 10. This is because the fluid contained in the filler 8 is squeezed out of the filler 8 when it is compressed. The compression element has two fluid-permeable openings 10 for draining the fluid from the section of the cap lined with the compressed filler 8.3, so that when the filler 8 is compressed, the fluid exiting from it can exit through the openings 10.3, which are fluid-permeable in at least one direction, in the opposite direction to the immersion of the nozzle 2 into the filler 8. In the detailed view of the . Fig. 6A of the compression element 10 in top view, the fluid-permeable openings 10.3 are designed as semicircular recesses that allow the fluid discharged from the compressed filler 8 to escape between the compression element 10 and the inner wall of the cap 2.

[0036] Advantageously, plastic, light metals or alloys of the aforementioned materials can be used as material for the closure device or the parts encompassed by the closure system.

Claims

[1] A closure device (1) in the form of a cap (2) with at least one lower opening (2.1) for releasably and fluid-tightly closing a nozzle (3) with at least one inlet opening (4) and at least one outlet opening (4.1) for a fluid (5), wherein the nozzle (3) can be fluidically connected via the inlet opening (4) to a cartridge (6) filled with the fluid (5), wherein the cap (2) completely surrounds the outlet opening (4.1) of the nozzle (3) and at least partially surrounds the inlet opening (4) of the nozzle (3) when the nozzle (3) is closed, such that the cap (2) seals fluid-tightly in the area of ​​the inlet opening (4) of the nozzle (3) by contacting the cartridge (6), characterized bythat the cap (2) is lined at least partially inside with a filler (8), wherein the nozzle (2) can immerse at least partially into the filler (8) when the nozzle (2) is closed with the cap (2), and that a compression element (10) functionally connected to the filler (8) and the nozzle (3) is arranged in a starting position (10.1) in the region of the lower opening (2.1) of the cap (2) such that when the nozzle (3) is immersed in the filler (8), the nozzle (3) penetrates the compression element (10) at least partially, and with the immersion of the nozzle (3) into the filler (8), the compression element (10) can be moved from the starting position (10.1) to a displacement position (10.2) inside the cap (2) that differs from the starting position (10.1), thereby supporting compression of the filler (8) above the compression element (10). This has been done. [2] Locking device (1) according to claim 1, characterized by , that the cap (2) when closing the nozzle (3) arranged on the cartridge (6) extends at least section by section beyond the inlet opening (4) of the nozzle (3) over an upper section of a wall (7) of the cartridge (6). [3] Locking device (1) according to claim 1 or 2, characterized by , that the cap (2) can be attached at least detachably in the area of ​​the fluid connection between the cartridge (6) and the inlet opening (4) of the nozzle (3) at the connection between the cartridge (6) and the inlet opening (4) of the nozzle (3) or at the nozzle (3). [4] Locking device (1) according to any one of the preceding claims, characterized by , that the cap (2) can be attached to the cartridge wall (7) at least detachably. [5] Locking device (1) according to any one of the preceding claims, characterized by, that at least when force is applied to the filler (8), in particular when pressure is applied via the nozzle (3) during immersion in the filler (8), the sectional lining of the cap (2) can be altered by the filler (8), in particular the filler (8) can be compressed. [6] Locking device (1) according to any one of the preceding claims, characterized by , that by guiding the compression element (10) from the initial position (10.1) to the displacement position (10.2) which differs from the initial position (10.1) the filler (8) in the area of ​​the outlet opening (5) of the nozzle (3) can be adjusted to a minimum filler volume surrounding the outlet opening (4.1). [7] Locking device (1) according to any one of the preceding claims, characterized by , that the cap (2) is supported at least partially on a shoulder area (6.2) encompassed by the cartridge (6) when the nozzle (3) is closed in a fluid-tight manner. [8] Closure system (100) for fluid-tight sealing of a nozzle (3) which is fluidically connected to a cartridge, comprising a closure device (1) in the form of a cap (2) according to one of the preceding claims, and a nozzle (3), characterized by , that the cap (2) and the nozzle (3) have interacting engagement elements (20, 30) such that the cap (2) can be detachably attached to the nozzle (2) via the interacting engagement elements (20, 30).

Images