US3009602A - Aerosol bomb - Google Patents

Description

' W. RAEHS AEROSOL BOMB Nov. 21, 1961 Filed May 5, 1968 IN VEN TOR.

United States Patent Ofiice 3,009,602 Patented Nov. 21, 196 1 V AEROSOL BOMB Wilhelm Raehs, Stolberg, Rhineland, Germany, assignor to Consilia Fidnciaire, Basel, Switzerland Filed May 5, 1958, Ser. No. 733,084

'2 Claims. (Cl. 220-67) The present invention relates to a container, preferably in form of a can, for receiving aerosols.

It is known to make aerosol cans or aerosol bombs from deep drawn steel or aluminum sheet metal. When employing steel sheet metal, it is known to solder or weld the hull of the cans in overlapped condition. These metallic cans or'bombs have the drawback that they are subject to corrosion by their contents; Due to this drawback, glass bottles have been employed as. aerosol bombs which, however, have. the drawback that they break easily. In .an'eiiort to overcome this drawback, such glass bottles have been covered by a protective layer of polyvinyl chloride. layer was not sufficient protection against the easy breakage of the glass bottle.

Recently, also blown synthetic aerosol bottles and bottles of melamine resin have been employed. These bottles have the drawback that the wall thickness cannot be dimensioned expediently and so as to save material, while the bottom of such bottles cannot be welded absolutely tight. In addition thereto, melamine resin bottles cannot be deformed.

Inasmuch as generally aerosol bombs are articles of mass production, it is, therefore, an object of the present invention to provide an aerosol container which can be produced with as thin a wall as possible but which will not break when being roughly handled or dropped.

It is another object of this invention to provide an aerosol container of the type set forth in the preceding paragraph, which can be sealed absolutely tight.

It is still another object of this invention to provide an aerosol container of non-breakable material, which after production of the container proper can still be deformed to such an extent as to allow the insertion and the securing of a valve body in said container.

These and other objects and advantages of the invention will appear more clearly from the following specification in connection with the accompanying drawings, in which:

FIG. 1 is a section through a container according to the present invention, the neck of which is provided with a metal cap and the bottom of which is connected with the hull by means of a genuine fold.

FIG. 2 illustrates the fold at the bottom of the can of FIG. 1 but on an enlarged scale over the latter.

FIG. 3 illustrates in section the container neck with inserted valve of FIG. 1 but on a larger scale than the latter.

FIG. 4 is a section on an enlarged scale of the Wedgeshaped contour of that portion of the synthetic container hull which is folded into the bottom portion of the container.

FIG. 5 illustrates partly in section and partly in view an aerosol bomb the hull of which is integral with a valve sleeve.

General arrangement The container or aerosol bomb according to the present invention is characterized primarily in that the container hull is made of synthetic material and is connected to a metallic bottom by a genuine fold. By genuine fold is to be understood a fold in which that portion of the metallic bottom, which is to be united with the hull by folding, is formed by an approximately -U-shaped marginal portion of the bottom, while one leg ofsaid U-shaped marginal portion of the bottom extends between the outer However, it was found that such protective 2 wall of the container hull and the upwardly bent marginal portion or flange at the lower end of the container hull.

Structural arrangement Referring now to the drawings in detail, the container hull 1 may be of any convenient shape, for instance of a conical shape as shown in FIG. 1, a cylindrical shape or may have a cylindrical portion 1a (see FIG. 5) and a conical portion 1b. The lower marginal portion of the hull 1 is connected to a metallic bottom 2 by a genuine fold as is particularly clearly shown in FIG. 2. As will be seen from this figure, the lower marginal portion of hull 1 has an upwardly bent section or flange 4 which is embraced by a fold formed by the marginal portion of the bottom 2 and comprising the legs 5, 6 and the portions 6a and 6b forming so to speak an extension of the leg 6. The portion 6b extends between the flange 4 and the outer wall 7 of hull I. I v

A particularly good seal by the fold is obtained if the lower marginal portion or flanged portion of the container hull, which extends into the fold is designed in a wedge-shaped manner as is illustrated in FIG. 4. According to the arrangement of FIG. 4, the flange 40 is wedge-shaped in such a way that it has its greatest thickness at approximately the edge 40a, whereas the lower portion of the flange 40 has a thickness approximating the thickness of the container hull. As will be obvious from FIG. 4, the wedge-shaped flange 40 pulls itself into the fold when the bottom 2 is put under load. As a result thereof, as has been proved by numerous tests, the sealing effect is still further increased.

The synthetic hull of the container is provided with a neck 8 (FIG. 3) which latter may be provided with an inwardly extending annular flange 9. A metal sleeve 10 is mounted over said flange 9 and neck 8. The metal sleeve it} is nicked or bent inwardly at 11 thereby forming a bead 12 protruding inwardly into the interior of the container. This bead secures a valve 13 in its position. Instead of providing the metal sleeve or cap 10 with a nick 11, it is, of course, also possible to roll in the metal cap 10 to provide the seat for the valve 13. The sleeve or cap '10 forms a valuable reinforcement for the syn-v thetic neck so that a pressure exerted upon the valve for actuating the latter will not deform the neck 8 of the container.

According to a further embodiment of the invention, the upper end of the synthetic hull may form the sleeve of a valve so that said valve sleeve will be integral with the synthetic hull of the container. Such an arrangement is shown in FIG. 5. As will be evident from this figure, the upper end of the synthetic hull comprises a web 14 merging with a sleeve 15 for the valve. This sleeve holds a valve stem 16, the lower end of which forms the valve head or valve cone 17. The valve stem 16 is held in said sleeve 15 by means of one or more dogs. If the valve sleeve is bent or edged laterally, which is facilitated by the notch or recess 15a, the conical surface of the valve head 17 will be spaced from its seat 19 thereby allowing aerosol under pressure to escape through sleeve 15.

In order to prevent an accidental edging or bending ofvalve sleeve 15, the container may be provided with a cap 20 having extensions 21 with small bores through which a wire or thread may be threaded and passed through corresponding bores of an extension 22 on the a The synthetic layer "23 on the metallic bottom may consist for instance of polyamid.

It is, of course, to be understood that the present invention is, by no means, limited to the particular construction shown in the drawings but also comprises any modifications within the scope of the appended claims.

What I claim is:

1. A container for receiving aerosols, which comprises: a hull of synthetic material, and a metallic bottom tightly connected to said hull, said hull having its end portion adjacent said bottom bent outwardly so as to form an annular trough, and said bottom having a marginal portion of substantially U-shaped cross section with an inner leg and an outer leg, said inner leg closely and firmly engaging the inner surface of the adjacent end of said hull, said outer leg extending around and into said marginal trough while closely and firmly engaging at least the outside of the outer wall of said trough thereby forming with said trough a genuine fold tightly interconnecting said bottom and said hull.

2. A container for receiving aerosols, which comprises: a hull of synthetic material, and a metallic bottom tightly connected to said hull, said hull having its end portion adjacent said bottom bent outwardly so as to form an annular trough, the outwardly bent portion of said annular trough being wedge-shaped so as to taper in the direction toward the bottom of said annular trough, and said bottom having a marginal portion of substantially U-shaped cross section with an inner leg and an outer leg, said inner leg closely and firmly engaging the inner surface, of the adjacent end of said hull and said outer leg extending around and into said marginal trough thereby forming with said trough while closely and firmly engaging at least the outside of the outer wall of said trough a genuine fold tightly interconnecting said bottom and said hull.

References Cited in the file of this patent UNITED STATES PATENTS 1,108,376 Lannoye Aug. 25, 1914 2,701,163 Teller et al Feb. 1, 1955 2,753,088 Prahl July 3, 1956 2,835,418 Manetti May 20, 1958 2,858,053 Waldherr Oct. 28, 1958 2,917,197 Glover et al Dec. 15, 1959

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