FI57379B - AEROSOLBEHAOLLARE AV METALL OCH MED EN VAESENTLIGEN CYLINDRISK BEHAOLLARMANTEL OCH EN GENOM FALSNING PAO MANTELN FAEST BOTTEN SAMT SAETT ATT FRAMSTAELLA DYLIK BEHAOLLARE - Google Patents

Description

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Patent- och registrerttyreiMn Aratkin utlagcl och utl.ikrlfUn publlcmd 30.04.00 (32) (33) (31) Requested atuolkwit —Begird prtoritet 0U.12.72 ~ Switzerland-Switzerland (CH) 17610/72 (71) Aluminum Suisse SA, Chippis, Switzerland-Schveiz (CH) '(72) Gilbert Dolveck, St-Barthelemy-de-Beaurepaire, France-Frankfurt (FR) (7 * 0 Berggren Oy Ab (5I +) Metallic aerosol dispenser with mainly cylindrical container casing and flattening with bases attached to the jacket and way to make such a container - Aerosol dispensers with a ring and a low-cylindrical cylindrical shell and a genome falsning head

The present invention relates to a metal aerosol container according to the species definition of claim 1 and to a method for producing it according to the species definition of claim 2.

Swiss Patent Publication No. 525,820 discloses an aerosol container with a fixed bottom, in which a flange in the lower part of the container shell, an annular area in the bottom cooperating with this flange and a sealing ring arranged therebetween are co-rolled inwards so as to form a substantially circular into a trough fitted to the circumference of the tank jacket. Thus, the cylindrical circumference of the two-part aerosol container is completely smooth and yet the collar in the trough is visible on the outside.

It is an object of the present invention to make the adhesive beads in the container shell and bottom invisible from the outside in aerosol containers according to the type definition of claim 1 and at the same time strengthen the beads and their mutual engagement so as to avoid metal rupture and rupture as the bottom of the container is inflated.

57379

The object of the invention is achieved in a container with the features set forth in claim 1.

The technical advantages achieved in this way are that the aerosol container has a smooth cylindrical outer wall throughout and its bottom is fixed to the container jacket so that the pressure required to tear the bottom is higher than the pressure at which the bottom vaults outwards. Until now, this requirement, which is required for most practical applications, has only been possible with steel sheet metal soles.

One method according to the type set out in the introduction and the features set out in claim 2 is well suited for the production of such a container.

In this way, it has the advantage that it comprises only a few easy-to-perform work steps.

The accompanying drawing shows an example of a suitable embodiment of the invention in its various manufacturing steps.

Figure 1 shows the container after the first step, the bottom before it is attached, and a detail from the bottom.

Figure 2 shows the same container and detail from the bottom after the second work step.

Figure 3 shows the same container and detail from the bottom after the third work step.

Figure 4 shows the same container ready and a detail from the bottom after the fourth working step.

A groove 4 is formed at the lower end of an aluminum tube jacket with a deep-drawn, truncated cone-shaped top end 2 and an inverted edge 3 to which a valve is to be attached by a method called mandrel straightening 3 57379 by manipulating the tube jacket 1 inwards so that the lower edge of this groove is approximately large than the diameter of the cylindrical shell 1.

A base 6 having a convex portion 6a, a cylindrical portion 6b, a collar 6c and an edge 6d approximately parallel to the cylindrical portion 6b is then fitted to the edge 5, and this base is fixed by a conventional engraving step, whereby the collar 6c is folded up in this drawing. The size of the base, compared to the tubular jacket, is chosen so that its outer diameter after pickling is approximately equal to the outer diameter of the cylindrical wall minus four times the wall thickness, knowing that the radial retraction of the bottom during pickling is approximately "twice the thickness of the cylindrical wall. 2 the homes of the battery are visible, while the depth and shape of the groove 4 are such that the groove adapts to the parts 6b and 6c of the base in such a way that the lid is attached to the casing and that a satisfactory etching is obtained.

In a third operational step, which in Figure 3, base 6 is inserted into the container, by applying pressure to the bottom in the direction of the arrow F, a tool having a bottom curvature of the rounded end, respectively. During this work step, the base pushes the pickling into the tank without visibly detaching or deteriorating. The wall of the sheath 1 actually deforms in such a way that it follows the displacement of the pickling, forming a bend 7. The formation of this bend is possible due to the choice of the mutual dimensions of the base and the sheath.

In the position according to Figure 3, the pickling is already hidden inside the jacket 1. In addition, it is possible to use the bend 7 to strengthen the attachment of the base, for example by bending the bend 7 on the bevel to form a rim 7 'according to Fig. 4. As can be seen, the bevel has to rest against this rim so that the internal pressure of the tank is initially change the shape of this rim 7 'and push the base into the position according to Fig. 2 before it can affect the pickling. It is obvious that the base buckles long before it comes off, which aerosol can users usually just demand.

Claims (2)

4 57379 1. Aerosol containers made of metal and with a cylindrical cylindrical bead (1) and a genome fused to a plurality of cylindrical beads (6) kännetecknad därav, att behällarmanteln (1) omedelbart Bortom sin nedre kand är formad account ett veck _ (7), som täcker ytterperiferin av falskanterna (5, 6c) och som är bockat inät sä, att det kant kant (7?) delvis griper in under falskanterna (5 * 6c). A metal aerosol container with substantially cylindrical sheaths (1) and by flattening the base (6) attached to the sheath, wherein the interlocking grooves (5, 6c) in the container shell and bottom are inside the cylindrical body forming the container shell, characterized in that the container shell (1) is immediately adjacent to its lower edge provided with a bend (7) covering the outer circumferences of the bellows (5j 6c) and bent inwards so that it partially engages under the bellows (5, 6c) as a rim (7T). A method of manufacturing an aerosol container according to claim 1, wherein an annular groove (4) is first formed in the lower edge of the cylindrical container jacket (1) having a groove diameter smaller than the outer diameter of the jacket and then the bead edge at the bottom (6) is fixed to the annular groove. (6) the outer diameter after attachment is approximately equal to the outer diameter of the tank jacket (1) minus four times the thickness of the tank jacket and then the bottom is forced into the tank jacket, whereby the fold (7) formed in the tank jacket is pressed and bent into bellows (5 »6c) so that the edge (7 ') thus formed partially adheres under the ribs. 2. A set of spheres and aerosol containers according to claim 1, having a set of spheres and rings (4) in the form of cylindrical cylindrical beads (1) in the form of a spherical diameter and all of which are the diameter of the spheres, and in the case of spheres 6) fasteners in the ring genome falsning, kännetecknat därav, att bottnens (6) outer diameters after fastening to the use of non-hazardous materials (1) outer diameters after the use of non-hazardous parts