Pressure container for receiving and mixing at least two separate components

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Short Title:

Int. Cl: 7

<td> c</td><td> Application Number: Lodged:</td><td></td>

<td> &lt;» © ' * » * * ~ V © - * * ^: fc tf</td><td> Complete Specification-Lodged: Accepted: Lapsed: Published:</td><td></td>

<td> a '</td><td> Priority:^-</td><td></td>

<td> Λ . ' • ♦ · ·</td><td> Related Art:</td><td></td>

<td> • * -Ύ * * · ♦</td><td rowspan="2"> TO BE COMPLETED BY APPLICANT Name of Applicant: LOTHAR MICZKA Address of Applicant: FELDWIESENSTR.22 CH-9450 ALTSTATTEN SWITZERLAND</td><td> This doct aent contains the amendments made under Section 49 and is correct for printing</td>

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<td> e ©</td><td> Actual Inventor:</td><td></td>

<td> 1 “ ^e i . - </td><td> Address for Service: CLEMENT HACK &amp; CO., 601 St. Kilda Road, Melbourne, Victoria 3004, Australia .</td><td></td>

<td></td><td colspan="2"> Complete Specification for the Invention entitled: PRESSURE CONTAINER FOR RECEIVING AND MIXING AT LEAST TWO SEPARATE COMPONENTS</td>

<td></td><td> The following statement is a full description of including the best method Of performing it known</td><td> this invention to me·:-</td>

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PRESSURE CONTAINER FOR RECEIVING ANS' MIXING AT LEAST TWO SEPARATE COMPONENTS.

The invention relates to a pressure container for receiving gaseous and/or flowable components in at least two separate partial containers provided with a discharge valve and for mixing said components on discharging by means of a blowing or foaming medium, which has a container body or frame provided on the end faces with a bottom and a cover or hopper.

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Throughout this specification the term hopper is used as a synonym for the term cover, and the terms inner partial hopper and outer partial hopper are used as synonyms for inner partial wall and outer partial wall, respectively.

Apart from the known pressure containers for the removal of a single flowable phase, of e.g. US patent 2 662 668, pressure containers are also known (PCT WO 84/01355) , in which several components are housed in separate partial containers and are only mixed just prior to processing by forming a connection between the separately stored components and then discharge takes place as a mixture through a single dosing valve. It is a disadvantage of this construction that on the one hand uniform mixing of the components is not ensured and on the other the mixing carried out in the container is subject to changes if the container content is not completely processed immediately on mixing the components.

In another pressure container type, said disadvantage is overcome by placing the components in separate partial containers by only mixing the partial quantities of the components required for discharge purposes, but then other problems occur. In particular, throughout the emptying process, the components are to be mixed with a constant mixing ratio, which presupposes that the compressive load or the compressive load ratio on the individual partial containers remains unchanged, i.e. during the pressure container emptying process changes to the shape and position do not lead to any modification of the mixing ratio. It is also necessary for tha

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arranged in the hopper, it being desirable to be' able to use ' standardized valves. However, this is not possible in practice : with the generally used convex hoppers. Reference is made in this connection to the simultaneously filed industrial property right of the_ • β · • · · tt » ♦ · ♦ * * « © i* «

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Applicant relating to the construction of the hopper (AU 72678/87) , which is considered to supplement the present invention.

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The problem of the present invention is to so construct a pressure container of the aforementioned type that it can be exposed to the action of a high pressure for maintaining a constant mixing ratio, use being made of standardized discharge valves for sealing the partial containers and the mixing ratio of the 'components can be adapted in simple manner to the required ratio value.

According to the invention there is provided a pressure container comprising:

a hollow cylindrical body;

a bottom wall and a cover disposed at opposite ends of said body for sealing said container;

a plurality of separate internal containers housed within said body, each internal container provided with a valve for allowing discharge of the contents therein;

said cover provided with a plurality of ports corresponding in number to the plurality of internal containers, each valve secured to respective ones of said ports; and, an adaptor head connectable to said plurality of valves providing simultaneous operation of said valves and including a plurality of supply lines in communication with each other for mixing the contents of the internal containers after discharge therefrom, said adaptor head including a body portion and a head portion;

wherein each supply line is provided with a dosing sleeve communicating between said body portion and said head portion, and wherein said head portion can be detached from said body portion whereby the dosing sleeve can be removed and replaced.

Preferably the cover is constructed as an e.g. partly profiled, but substantially disk-shaped wall, in which an inner partial

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2Α wall (or hopper) has a smaller diameter than the outer partial wall (or hopper) associated with the inner partial wall. Due to the double wall, an adequate cover strength is obtained, even without a convex hopper shape and in addition the flanging of the hopper with the body edge usj ng the edge of the larger diameter outer partial wall projecting over the inner partial hopper is simplified.

The invention is described in greater detail hereinafter relative to an embodiment of a pressure container with two partial containers and a few different accessories and the attached drawings, wherein show:

Fig. 1, a section through a pressure container with two partial containers along line I-I in fig. 2.

Fig. 2, a plan view of the hopper of the pressure containe.r_

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-3according to fig 1 from direction II in fig 1 .

Fig 3, a section of the hopper of the pressure container according to fig 1 along line III - III of fig 2.

Fig 4, another section through the hopper of the pressure container according to fig 1 along line IV - IV in fig 2.

Fig 5, a detail of the section according to fig 4 on a larger scale and with a closed venting means.

Fig 6, the same detail as in fig 5, but with the venting means open.

Fig 7, a section through an adapter head to be mounted on the partial container valves.

Fig 8, an actuating device for the adapter head.

Fig 9, another actuating device for the adapter head.

Fig 10, a section through the sealing part of a joined piston according to fig 1 . .

Fig 11, a section through the piston according to fig T.

Fig 12, a partial plan view of the sealing part according to fig,10 from direction XII.

The pressure container 1 shown in fig 1 comprises a container body or frame 2 manufactured from e.g. tin plate, aluminium, an aluminium alloy, plastic or a composite metal - plastic material, an inwardly curved bottom 3 and a hopper 4. Pressure container 1 houses two partial containers 5, 6, which are made from plastic and whose bottom parts 7, 8 are supported on a piston 9. Piston 9 is subject to the action of a gas propellant filling, which fills the space between piston 9 and bottom 3 and can be filled through a seal 10, e. g. a pressed-in plug or a one-weiy valve. Hopper 4 has two circular openings 11, 12, cf fig 2, whose construction will be explained hereinafter relative to figs 3 and 4.

As can be gathered from figs 3 and 4, hopper 4 comprises two partial hoppers, an inner partial hopper 13 on the one hand and an outer partial hooper 14 on the other. The diameter of the inner partial hopper 13 roughly corresponds to the internal diameter of the cylindrical container body 2 and is constructed with a greater wall thickness than the outer

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-4partial hopper 14. Partial hopper 14 has a larger diameter than inner partial hopper 13 and has in the circumferential region a groove 15, against which the inner partial hopper 13 engages from the inside. The outer partial hopper 14 is circumferentially provided with a flanging part 16, by means of which is produced the flanging between the edge of container body 2 and hopper 4. Due to the fact that only one and in the present case the outer partial hopper 14 is used for said flanging, this can be carried out with limited expenditure and in a reliable manner.

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As can be gathered from figs 3 and 4, openings 11, 12 are provided with a rim 17, which is roughly at right angles to the hopper plane and is remote from the inner partial hopper

13. It is important that rim ¹7 is formed from both partial hoppers 13, 14, so that its wall thickness represents the sum of the wall thicknesses of the two partial hoppers 13, 14 and no additional flanging or beading is required.

Rim 17 serves to receive a valve disk 18, whose edge curvature 21 embraces the unrolled rim 17 formed from partial hoppers 13, 14 and is crimped therewith. Thus, a reliable connection is formed between valve disk 18 and hopper 4.

The partial containers 5, 6 constructed as gusset bags have an upwardly open socket-like bag neck 22, 2.3, which has a reinforcing bead 24, cf figs 3 and 4. The edge of the bag neck 22, 23 is placed under the edge curvature 21 of valve disk 18 over rim 17 of hopper 4 and then crimping with the valve disk 18 is carried out. Thus, the bag neck 22, 23 forms a reliable seal between hopper 4 and valve disk 18. Each valve disk 18 carries a valve 19, 20, with which a complete sealing of each partial container 5, 6 is ensured. Both valve disk 18 and valves 19, 20 are standard components, which can be used without any modification due to the construction of hopper 4.

A Valves 19, 20 comprise a tubular valve tappet 25 and an,

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-5elastically deformable valve body 26 engaged in an opening 27 in bottom 28 of valve disk 18. The construction and function of valves 19, 20 is known, cf e.g. US patent 3 662 926.

The substantially planar hopper arrange two or more valves 19, 20, makes it possible as a function of

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( ito the number of partial containers 5, 6 used. Due to the use of partial hoppers 13, 14, hopper 4 can even be used for high pressures, without the wall thickness of the partial hoppers 13, 14 having to be made excessively thick. The partial hoppers 13, 14 form a stable entity, because they are appropriately interconnected, e.g. by spot welding or bonding. As can be gathered from fig 4, between the two partial hoppers 13, 14 is formed a cavity 29 provided with passages 30, 31. Cavity 29 can be constructed as a venting means, cf figs 5 and 6, in that an elastically resilient tongue 32 is inserted in cavity 29. Tongue 32 engages on passage 31 of the outer partial hopper 1 4 and is consequently in the closed position, in which the interior of pressure container 1 is sealed in pressure-tight manner.

is moved away from passage 31 by depressing a brought into the open position, cf fig 6, a

If tongue 32 pin 33 and connection is formed between the interior of pressure container 1 and the external air. This venting operation is always necessary on removing components from partial containers 5, 6, so that the piston 9 subject to the action of the propellant gas filling can perform its lifting movement for emptying partial containers 5, 6.

When using pressure container 1 , the components must be brought together and mixed prior to the discharge from partial containers 5, 6. For bringing together the components, an adapter head'40 is provided, which is mounted όη valves 19, 20 of partial containers 5, 6 and and has two supply lines 41, 42 issuing into a connecting piece 43. Into the latter is screwed a not shown mixing tube, in which the components are mixed and brought to the processing point.

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-6Adapter head 40 is constructed in multipart form, being constituted by a body 44 and a head 45 with connecting piece

43. Head 45 is screwed by means of a box nut 46 onto body

44, which also has a stop plate 49.

For sealing adapter head 40 on valves 19, 20, for each supply line 41 , 42 a relatively soft, conical sealing sleeve 47 is inserted in body 44. At the transition between body 44 and head 45, in each case one dosing sleeve 48 is provided in the supply lines 41, 42. Dosing sleeves 48 make it possible to set the mixing ratio of the components, so that they are interchangeable after removing head 45.

Piston 3 is in two parts, a sealing part 50 on the one hand and a cup-shaped piston part 51 on the other. The two parts 50, 51 are made from plastic and are connected to one another e.g. by bonding or welding. On the partial container side, sealing part 50 has a recess 52, into which project the bottoms 28 of partial containers 5, 6 and are supported by ribs 53, cf figs 10 and 12. In the centre of recess 52 is provided a projection 54, in whose rear recess projects and is centered a projection 56 of head 57 of piston part 51. A further centering of piston part 51 is achieved by 58, which define a recess 59 facing recesses 52, 59 are surrounded by a which has a plurality of circular grooves 61 for packing rings 62. In fig 10 there are three packing rings 62, but the number thereof can be modified at random.

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According to fig 11, piston part 51 is a relatively thin plastic part, whose piston skirt 63 is provided on its free edge with a conical sealing and guiding lip 64.

For removing the components from partial containers 5, 6, adapter head 40 is depressed, so that valves 19, 20 are simultaneously and uniformly opened. In accordance with the pressure uniformly exerted on the bottoms 28 of partial containers 5, 6 by piston 9, the components are delivered in

-7connecting pieces 43 and it is possible for the ratio of the components to be fixed by dosing sleeves 48.

The ratio of the discharged components can also be obtained by partial containers 5, 6 with different cross-sections. As can be gathered from the two broken lines in fig 2, partial containers 5, 6 have the same cross-section. Dosing sleeves 48 make it possible to modify the ratio of the components to a certain extent. However, if the mixing ratio is large, partial containers 5, 6 must have different cross-sections. For example, one cross-section can be circular and the other reniform. These possibilities make it possible to vary the

<td></td><td> mixing ratio within wide limits and can viscosity of the components.</td><td> be</td><td> adapted</td><td> to</td><td> the</td>

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<td> « »» ftft β</td><td> depressing the adapter head 40 during</td><td> the</td><td> removal</td><td> of</td><td> the</td>

* » » « .«·» components. Both actuating means have a fixing sleeve 87, which is mounted on hopper 4 of pressure container 1 and ft · ft * · engages on the hopper flanging. As can be gathered from fig

J « *··· 8, a bent lever 88 is pivotably mounted at the end of one

I lever arm 89 on fixing sleeve 87. The other lever arm 90 ,, extends along pressure container 1 and is used for manually k s fi ' ί ' ’ ’ operating the bent lever 88. One lever arm 89 extends

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I ¹¹ through a passage 91 of adapter head 40. Through the { .. ... depression of bent lever 88, adapter head 40 is depressed, so j ¹ that valves 19, 20 are opened. On the hopper side, two pins ΐ 33 are fixed to stop plate 49 of the adapter head 40, of figs and 6 and on depressing adapter head 40 bring tongues 32 ί ' ^: ' . into the open position, so that the interior of pressure ' , ‘ container 1 is vented. Adapter head 40 is not shown in figs and 9 and instead, for reasons of clarity, only its hopper y .

or valve-side stop plate 92.

According to fig 9, actuating means 86 has a turn sleeve 93, which is screwed to the fixing sleeve 87. On turn sleeve 93 is also provided a control ring 94, which is destroyed on turning turn sleeve 93 for opening valves 19, 20 and

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-8consequently indicates that pressure container 1 has already been used.

The described pressure container 1 can be used for random components. Not only two, but even three and even possibly more components can be housed in the pressure container 1, the hopper surface permitting the arrangement of valves with the aid of standardized valve disks. The strength of hopper 4 can be adapted through the choice of the wall thicknesses of partial hoppers 13, 14 to the requirements of the particular case. The partial hoppers are appropriately made from different materials, as are the container body and container bottom 3. Suitable materials are metals, e.g. tin plate, aluminium and its alloys, plastics with and without reinforcement or composite metal - plastic materials. The parts of the adapter 40 are preferably made from plastic or * ,metal, whilst the actuating means 85, 86 are made from ,,., plastic or metal. In addition, it is possible to adapt the dosing ratio within wide limits by dosing sleeves 48 and t # #. . ' , ^: • * partial containers 5, 6 of different sizes.

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It would also be possible to operate pressure container 1 ,, without piptea 9. in this case there would be no need for # 0 , passages 30 _# 31 in hopper 4 or the tongues 32 are left in the

W/ dosed position.

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