DE7014898U - Aerosol spray can - Google Patents

Description

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Geigy

J.R. Geigy A.G., CH-40Q0 B * mI21

2-3045 / GC

AER0S0L-SPRUEHD0SE

The invention relates to an aerosol spray can with a cap and a valve structure with a valve body, in particular an aerosol spray can, in which the spray substance to be dispensed is in a separate from the propellant material container and the propellant is housed in an inner chamber that is from the outside Container is surrounded.

There are aerosol spray cans of this type known with a cone valve attached to the underside of a cap are. The cap covers the outer or fabric container or a jacket surrounding it. The cone valve has a Valve housing containing a valve mechanism that controls the propellant flow and the flow of the product to be sprayed during dispensing. In the usual embodiment consist of the outer container, cap and valve body made of one and the same type of plastic. This plastic usually consists of a somewhat resilient and easy-to-shape synthetic thermoplastic resin. Usually it is Valve housing attached to the underside of the cap in such a way that a dangling part on the underside of the cap and on the

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A plug-in part is provided on the upper side of the valve housing. These two parts are made in a conventional manner, for example by roller welding, ultrasonic welding or heat welding connected with each other. For this purpose, however, special connection

S equipment required, such as a welding machine or the like. Since such a device can be operated by one person but Niue, the compounds are not always uniformly good and the good of the connection varies darUberhinaus nor from operator to operator. Is also welded by means of heat, so the heat occurring at the connection point can more or less unfavorably the dimensional accuracy of the adjoining parts affect, which in turn depends in part on the experience of the operator.

Further, it is desirable in some cases, the cap and the valve housing of different plastics herzu- '■■■' β share, for example, when the valve housing is integrally connected with a propellant container, the impermeable from a for the blowing agent of plastic, while the Cap is made of a different plastic that need not be impermeable to the '20 propellant. However, if the parts are made of different plastics, they usually cannot be connected to one another in a conventional manner, for example by welding.

The present invention is therefore based on the object of a simple mechanical connection between the cap and the To specify valve housing for aerosol spray cans of the above type. The cap and valve housing are intended to be used without a conventional Plastic connection, for example 7schweissung, by a can be connected to each other with a simple handle.

According to the invention, this is achieved by an aerosol spray can in which the cap is provided with a plug-in device that hangs down from its underside, which is part of a

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mechanical preferably non-releasable connection or coupling forms. The valve housing of the cone valve is provided with a further plug-in part of the mechanical connection which is attached to the top of the valve housing. One of the plug-in parts, which serves as a plug part, is preferably ring-shaped and has a protruding flange. The other plug-in part, which serves as a socket or socket part, has a protruding annular collar or a plurality of fingers provided with protrusions which can engage with the flange of the annular part.

With this structure, the cap and the valve housing only need to be pressed against one another. The ring-shaped part with the protruding flange or the ring-shaped collar or the fingers or both parts are deformed sufficiently so that the ring-shaped collar of one plug-in part passes the ring-shaped flange of the other part and snaps over the ring-shaped flange so that both of them fit together Intervention come.

The invention is explained in more detail below with reference to the exemplary embodiments shown in the accompanying drawing. Show it:
1 shows a sectional view of the upper part of an aerosol spray can with a cap and a valve housing;

Fig. 2 is an enlarged section of part of a second embodiment of the spray can; and

3 shows an enlarged section of part of a third embodiment of the spray can.

The aerosol spray can has an outer container 1, which either itself contains the product to be sprayed in flowable form, for example a liquid or a finely divided powder, or a flexible bag or a similar product

Contains container. A cap 3 is attached with its edge 4 on a ' ^: -coulter 4a at the open upper end of the wall of the outer container sr; - ^{r' s 1.} In the middle of the cap 3 an OerC- ^ g 3a is provided through which the valve stem 5 of the Kegelve Is

From the lower surface of the cap 3 hangs down one male connector of the mechanical coupling. In the embodiment shown in FIG. 1, this part consists of a socket or base part which has the shape of a ring 6. The ring 6 has an inwardly projecting flange 6a at its lower end. The upper surface of the annular flange 6a is preferably slightly inclined so that the innermost edge protrudes around the central opening of the flange back to the cap 3, ie upwards from the ring 6 to above the area in which the inclined upper surface of the flange meets the Inner wall of the ring 6 itself abuts.

A valve housing 7, which has a central channel 8, is located below the cap 3. An opening in which a sealing ring 9 is located extends through the underside of the same. The upper part of the valve housing 7 around the opening of the central channel 8 is designed as a plug part 7a of the mechanical connection. In the embodiment of Fig. 1 , this plug part has an annular collar 10 which protrudes radially outward and whose lower surface is preferably slightly inclined so that its lower outer edge protrudes backwards towards the valve housing, that is, downwards as seen from the plug part 7a . The annular collar 10 is in tight engagement with the ring 6 via the inwardly projecting flange 6a.

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The valve housing 7 can be made of a thermoplastic resin, while the cap 3 and the depending ring 6 may consist of a different plastic.

"■■ During assembly of the valve housing and the cap, only the valve housing 7 to hold the top of the ring 6 need not be. The annular collar 10 expands while the ring 6, so that • the collar 10 passes by the inwardly projecting flange 6a. The flange 6a then snaps under the annular collar 10, so that the valve housing is held tightly on the cap 3.

In a further embodiment, one of which in FIG preferred form is shown, the male part of the connection, i. H. the annular collar 10 on the valve body 7 at the Inside of the cap are attached, so that the ring 6 depending on the cap ■ "· ■" with an outwardly protruding ring-shaped Covenant is provided. The can part is attached to the valve housing 7 so that the inwardly projecting annular flange 6a is located on the valve body.

The aerosol spray can with the coupling according to the invention also has an annular flange or a sleeve 11 which hangs down from the valve housing 7. At the lower end of the sleeve 11, a propellant chamber 13 is attached, in the interior of which there is a propellant 14, which is normally liquid and is under increased pressure. In the embodiment of the aerosol spray can shown, the upper edge of the propellant chamber 13 is designed to be complementary to the lower edge of a downwardly and outwardly widened part 12 of the hanging flange 11 . These parts are connected to one another to form a common part, for example by welding. However, these parts can also be connected to one another in other ways, for example by bending the metal wall of the metal chamber over the edge of the nccn externally widened part and between the metal and the plastic

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- 6 def. *>; vetterten part of a seal is arranged.

, between the ring-shaped head part 7a serving as a plug around the top of the valve housing 7 and a downwardly protruding projection 3b around the opening 3a in the cap 3, a sealing ring is clamped. This sealing ring serves as a low-pressure seal for the product to be sprayed and optionally against the influx of air to the material container 1 from inside the spray can.

The valve stem 5 extends through the central channel 8 of the valve housing 7 through and the opening 3a in the cap 3 opens into an upper open end region 8a of the central channel 8. As an actuating device for the spray can is a push button 16 which is attached to the upper end of the valve stem 5 and a DUsen insert 17 contains, in which there is a Venturi nozzle 17a. The DU insert 17 is inserted into a corresponding recess in the push button 16. The enlarged opening area 8b of the central channel 8 in the bottom of the valve housing opens into the interior of the propellant chamber 13.

By means of a spring 20 which lies around the valve stem S, a flange 19 is pressed upwards on the valve stem. The lower end of the spring 20 is held in a recess of a holding part 21 which is located in the lower part of the central channel 8. The retaining ring 21 is pressed against the sealing ring 9, which serves as a high-pressure seal and which lies on the lower part of the central channel 8 around its opening area 8b The end of the retaining ring 21 protrudes into the central channel 8. The spring 20 presses the flange 19 upwards so that the flexible lip of the sealing ring 15 between a frustoconical seat 19a on the flange 19 and the annular projection 3b around the

Edge of the Opening 3a held in the cap 3 will, whereby himself the Sealing ring 15 in the the way shown. In order to are the middle 701489823.8.73

channel opposite the opening 3a and a passage 7b, which extends through the ring 6 into the space below the cap 3, sealed.

The push button 16 seated on the valve stem 5 has at its base two coaxial sleeves, of which the outer sleeve, which is formed by a downwardly projecting wall 23, sits tightly around the valve stem 5. The inner sleeve 23a receives the upper end 5a of the valve stem 5, the diameter of which is reduced compared to that of the rest of the valve stem. The inner sleeve 23a can be pressed along the valve stem 5 up to an annular shoulder 5c at the base of the upper end 5a of the valve stem 5. The valve stem 5 is provided with ribs 25 along its outside, between which channels 24 are located. The channels 24 open to the outside through openings 26 from the valve stem. The upper end of a dip tube 27 opens ? ^? ch in the central channel 8 and is in a bore 27a in the vent? .jadrper 7 in a press fit be fastened. The product to be sprayed is conveyed into the central channel 8 through the dip tube 27. Instead of the dip tube 27 and the inlet and outlet can '..' a flexible bag can be inserted into the bore 27a, which then is preferably perpendicular to the center axis of the center channel. 8 In this case, the flexible bag containing the material to be dispensed and is vorzugsw- 'ithin the Susseren container 1 and around the Treibina .. · e ¹ .airaner 13'. In this embodiment ( not shown), there is preferably an opening in the wall of the outer container 1 or the cap 3 , so that the outer wall of the flexible bag is always under atmospheric pressure.

The valve stem 5 is preferably made of one part, for example cast. It has an axial bore 28 which is closed at the lower end with a conical insert 29.

'The valve stem 5 has at the lower end a neck 29a with a reduced Diameter in which the bore 28 ends over several lateral openings 30. The side openings 30 are closed by the inner peripheral edge of the sealing ring 9 when the valve stem 5 is in the raised position. In the lowered position of the valve stem 5, so when the push button 16 is pressed, the sealing ring 9 is bent and the side openings 30 open. The propellant can thus enter the axial bore 28.

In the position of the individual parts of the spray can shown in FIG. 1, the propellant under high pressure is enclosed in the propellant container 13 by the sealing ring 9. The interior of the container 1 is closed by the sealing ring 15, so that both the substance to be dispensed and the propellant are sealed off from the outside atmosphere.

When the push button 16 is depressed, these seals are removed bent and the openings 30 opened, so that the propellant through the axial bore 28 of the valve stem 5 to the Venturi nozzle 17a arrives. As a result, the substance to be dispensed is bent through the immersion tube 27, through the central channel 8, over the now downward Sealing ring 15, sucked away and through the channels 24 and the openings 17b in the nozzle insert 17 to the neck of the Venturi nozzle 17a.

Another embodiment of the spray can is shown in FIG. 2 shown. A plug part in the form of a ring 32 hangs down from the cap 3, which has a further part 32a and a narrower inner part 32b owns. The part of the ring 32 between the further part 32a and the narrower part 32b is chamfered to the outside at 32c. An annular collar 33 protrudes radially outward from the lower end of the narrower inner part 32b. The ring-shaped collar preferably has a blunt end 33a, the

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both ring edges are beveled. The upper edge surface 33b of the annular collar 33 is beveled upwards and outwards from the inner part 32b.

At the upper end of the valve body 7 there is a socket in the form of a plurality of upstanding fingers 34, at the upper end thereof ; each radially inwardly protruding parts 34a are attached. The lower surfaces 34b are preferably inclined from the fingers 34 downwardly. The upper ends 34c of the fingers 34 are preferably beveled inwardly from the valve body 7, so that they have a shape complementary to the outwardly beveled part 32c of the ring.

The fingers 34 are preferably evenly spaced around the circumference of the valve housing 7, while the ring 32 consists of a complete ring.

Since in this embodiment the coupling according to the invention consists of several fingers 34, these are designed to be sufficiently resilient so that they bend in the radial direction and go over the annular collar 33. In doing so, they snap into place over the waistband and engage with it. The inwardly beveled upper ends 34c of the fingers are pressed outwards by the beveled part of the lower end of the annular collar 33 , so that the spreading of the fingers 34 is facilitated.

It should be noted that the arrangement of the collar and the finger, the reverse may be one another, ie that the ring radially outside the finger is located and may include inwardly projecting collar, said projecting portions of the fingers project externally.

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In the embodiment shown in Fig. 3 embodiment, the parts of the Fig Ausftlhrungsform "> are practical. 2 from top to bottom. 'Versa. That is, the Stackerteil is as ring 7a on Ventll body 7 formed »while the socket part is on the cap 3 and has a ring 40 depending therefrom. Several fingers 41 are behind from the lower part of the ring 40 below, which are provided with inwardly projecting parts 41a. The inner edge of the inwardly extending portions 41a is at 41b beveled inwards.

On the ring part 7a of the valve housing 7 there is a plug part in the form of an outwardly protruding collar 42 and the The surface of the ring part 7a above the collar 42 is chamfered to the outside at 43.

If the valve housing 7 is pressed upwards against the fingers 41 with a ring part 7a, the beveled surface 43 presses the fingers 41 outwards when it slides along the beveled edge 41b of the fingers. This will make the fingers A sufficiently wide spread, so that the annular collar 42 engages with the ring 40 via the inwardly protruding part 41a . can snap.

As in the embodiment of FIG. 2, the mutual position of the covenant and the fingers be the opposite, so that the collar protrudes inwards and lies over the outwardly protruding parts of the fingers.

The mechanical connection between the cap and the valve housing is therefore a very simple one. With this connection you can the valve housing and the cap are made of different thermoplastic materials, diu according to conventional methods, for example by welding, heat sealing and the like

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cannot be connected to each other. The parts are sufficiently tightly engaged that the valve housing and the remainder of the cone valve are securely held on the cap _; Furthermore, this structure facilitates the attachment of the low-pressure sealing ring 15 between the cap and the valve housing and this seal is securely held in place during the actuation of the spray can. Since the connection is purely mechanical, changes in the quality of the welded or heat-sealed connections caused by operators during production are avoided. No heat is required, so that the dimensional stability of the various parts of the spray can is not impaired.

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Claims (12)

TA NSPRINTS . "1. Aerosol spray can with a single cap and valve assembly with a valve housing, characterized by a mechanical coupling of the cap with the valve housing, a plug part (7a, 32, 40) on the cap (3) or the valve housing (7) and a socket part (6, 34, 41) on the other of these two parts, the plug part and the socket part comprising radially extending parts (10, 33, 42 or 6a, 34a, 41a) which are in engagement with one another, so that a contact surface of the radially extending Part of the socket part which lies towards the part on which the socket part is arranged, with a contact surface of the radially extending part of the plug part is in contact, which is towards the part on which the plug part at is ordered, whereby the cap and the valve housing are tightly connected to each other. / 2. Aerosol spray can according to claim 1, characterized in that against the arranged on the cap Plug-in part of the coupling one surface of a sealing ring (15) rests, the other surface of which through the valve body (7) is brought into engagement that the sealing ring (15) is held tightly by the mutual engagement of the plug part and the socket part between them. ' 3. Aerosol spray can according to claim 1 or 2, characterized in that g e that the contact area of each of the radially extending parts of the two plug-together parts ■ inclined from the approach of the same towards that part, namely cap or valve housing, to which the plug-in unit in question is attached. 761489823.1.71 - 13 - 4. Aerosol spray can according to one of claims 1 to 3, characterized in that at least one of the 'plug-together parts has a beveled surface which can be brought into engagement with the other plug-in parts when the plug-in parts are moved against each other and by means of the one plug-in part can be spread relative to the other. / 5. Aerosol spray can according to one of claims 1 to 4, characterized in that the plug part on the Cap and the socket part is arranged on the valve housing. 6. Aerosol spray can according to claim 5, characterized in that the plug part and the socket part each have a ring with an annular projection at the end desselbeα delegated, which is called raaiaj. extending part serves .X 7. Aero sol spray can according to claim 5, characterized in that the plug part has a ring with a 'has outwardly projecting flange at its lower end and that the holder part has several upwardly standing fingers , each of which has a ti ^ ... vf \ th projection at its upper end. 8. Aerosol spray can according to claim 5, characterized in that the plug part has a plurality of fingers which are provided at their lower end with an outwardly protruding projection, and that the socket part at its upper end has a / ring with an inwardly protruding one ... has a flangeJ It »« - 14 - 9. aerosol spray can according to one of claims 1 to 4, characterized in that the socket part of the cap and the plug part is mounted on the valve housing. 10. Aerosol spray can according to claim 9, characterized in that g e k e η η - shows that the plug part and the socket part each have a ring with an annular projection at its end exhibit. ^ / "' 11. Aerosol spray can according to claim 9, characterized in that the plug part has a ring with a attached to the upper end protruding outwards Has flange and that the socket part has several downward fingers, which at its lower end with a inwardly protruding projection are provided. 12. Aerosol spray can according to claim 9, characterized in that g e k e η η, that the plug part has several fingers, each of which has an outward protrusion at its upper end have, and that the socket part has a ring with an inwardly extending ring attached to its end Has flange .. Basel, April 16, 1970 HWH / ab