Note: Descriptions are shown in the official language in which they were submitted.
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The present invention relates to a pressure can compri-
sing a container and a dosing valve disposed in an opening of the
container and intended for separately receiving components of a
mixture.or compound to be dispensed from the pressure can.
The properties of mixturesor compounds may be subject
to change or degradation as a function of time. The change or the
degradation can be such that the product can be no longer used.
In order to maintain the properties over a long period, the com-
ponents causing the change or degradation are stored separately
from the other components and they are combined only when the mix-
ture or compound is to be used.
The separation of the components is also desireable when
they develop special properties, such as forming a foam, on being
combined. For this kind of mixture or compound, the components
may be stored separately and combined only upon use. For example,
polyurethane foams are used in many fields. They consist substan-
tially of two fundamental components and small amounts of addi-
tives, which are mixed with one of the two components. When the
components are combined and thoroughly mixed, the polyurethane
foam is formed.
Various systems for dispensing small amounts of these
foams available are known. Apart from the simplest system, in
which the two components are kept in separate packages, poured to-
gether, and mixed for use, a system which causes problems for un-
trained personnel since one of the two components requires speci-
al precautions to be taken, asystem with one package is known. In
~; this one-package system, the two components are separated by a
diaphragm which must be pierced prior to use. Debris from the dia-
phragm frequently obstructs the mixing process, impairing the qua-
lity of the end product. Furthermore, this system can be emptied
only with the aid of an additional device.
All known systems have draw-backs associated either with
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their handling or storage.
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According to the present invention there is provided a
pressure can for dispensing a mixture or a compound, components of
which are stored separately prior to activation, comprising a
first container containing one component of said mixture or com-
pound, a dosing valve mounted in an opening of the first contain-
er, said dosing valve having a tubular extension through which the
mixture or compound passes, extending into the first container,
a movable valve member, and at least one frangible second contain-
er containing another component of said mixture or compound as-
sociated with said tubular extension and located such that actua-
tion of said valve member causes destruction of said at least one
frangible second container to release the contents thereof into
the first container.
The present invention will be further described, by
way of example only, with reference to the accompanying drawings,
in which:-
Figure 1 is a diagrammatic longitudinal section of a
top portion of a pressure can having a dosing valve for opening a
container containing a component of a mixture or compound, the
container being located in the paths of the dosing valve;
Figure 2 is a diagrammatic longitudianl section of a
container support according to a further embodiment of the pre-
sent invention;
Figure 3 is a lateral view of the support shown in Fi-
gure 2;
Figure 4 is a diagrammatic longitudinal section of a con-
tainer support according to another embodiment of the present in-
vention;
Figure 5 is a diagrammatic longitudinal section of a
container support according to a still further embodiment of the
present invention; and
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Figure 6 is a diagrammatic longitudinal section of a
container support according to another embodiment of the present
invention.
In Figure 1, a top portion 1 of a pressure can 2 has a
valve disk 4 secured to its edge 3. Both the pressure can 2 and
the valve disk 4 are thin-walled parts of metal or plastics.
The valve disk 4 is secured to the edge 3 of the pres
sure can 2 by means of a disk edge 5. The disk edge S merges into
a short feed pipe 6, boundedby a shoulder 7, which in turn merges
into a pipe~like extension part 10, whose diameter is smaller than
the diameter of the short feed pipe 6. However, the extension
part 10 can also form part of the short feed pipe 6, in which case
it has the same diameter. The extension part 10 has a rim bead 11
enabllng a tubular and sleeve-like connecting part 15 to be relia-
bly sècured thereto. However, the rim bead 11 can also be con-
structed as a thread so that tubular and sleeve-like connecting
parts 15 can be screwed to the valve disk 4.
The extension part 10 is bounded by an inwardly directed
flange 12, which has an opening 16 and serves for securing a valve
20. The valve 20 is suitably a tilting valve. The valve 20 has
a valve body 21 extending through the opening 16 and having an inside
valve seat body 22. The valve body 21 also has a spring or guide
bearing 23, in which a valve shaft 24 with an axial duct 25 is
disposed. The valve shaft 24 has a collar 26, against which the
spring or guide bearing 23 of the valve body 21 abuts. The valve
shaft 24 also has an inside flange cut-off 27, whose outer edge,
together with the valve body 22, seals the valve. Directly at
the flange cut-off 27 outlets 28 are disposed in the valve shaft
24. When the valve shaft 24 is tilted, the flange cut-off 27 is
lifted from the valve seat body 22 on one side and the contents of
the can pass through the outlets 28 into the axial duct 25 and
then to the outside. It will be noted that a moving part of the
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valve 20, in Figure 1 the valve shaft 24 with the valve cut-off
27, projects into the inside of the can 2.
In Figure 1 connecti,pg part 15 is a sleeve 35,
whose o~e end has an inwardly drawn-in shoulder 36, forming an
orifice 37. The other end of the sleeve 35 is disposed on the ex-
tension part 10 and thus retains the sleeve 35 in its position.
However, sleeve 35 may be in the form of a truncated cone, corres-
ponding to the dash-and-dot line 38, which is clamped between the
edge 3 of the pressure can 2 and the disk edge 5 in order to retain
the sleeve 35 in its position in this manner.
A frangible container 40, abuting the shoulder 36, is
disposed on the inside of the sleeve 35. The container 40 contains
a component of the mixture or compound. It is also possible for
the sleeve 35 to extend into more than one container 40. The con-
tainer 40 consists of glass or some other material which can be
broken or opened, for example, at a rated breaking point. When the
valve 20
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is o~ened, the valYe sha~t 2~ is pressed a~ainst the container
40 and the container ~,Qr containerS~ 40 is broken or opened
by the flan~e 27. The contents of the eontainer or containers
40 are discharged through the oxifice 37 and combined with the
component in the can 2. The container contents can be homo-
geneously distributed in the can by shaking to form the desired
mixture or compound.
In Figure 2, the connecting part 15 is also a sleeve
35, but in its cylindrical or conical portion it has a double
10 bead 41 anda concavely curved shoulder 36, to which a short
feed pipe 42 is connected. A plurality of slots43 are provided
in the shoulder 36.
A container 40 is disposed on the seat 44 formed
by the short feed pipe 42. In this~case also, several containers
40 can be disposed on the seat. A moving member 45, which, in
Figure 2, is a plate 46 havingan opening 47, serves for
transmitting the motion of the flange cutof 27 of the valve
shaft 24. However, the plate 46 can also have a different
shape, for example, it can be cross-shaped or wheel-shaped.
The openings in the moving member 45 serve for the passage of
the mixture or compound when the valve 20 is actuated.
When the valve shaft 24 is actuated the plate 46
is pressed agalnst the container 40, which thus is broken or
opened. The component passes into the concave portion of the
shoulder 36 and, via the openings 43, it combines with the
component in the can 2,
The slots 43 usuall~ are closed or only slightly
opened so that a pressure balance between the can and the
inside spa,ce of the sleeYe 35 c~n be attained. When the plate
3Q 46 ~s moyed onto the douhle head 41, the sleeve 35 is defor,med
in the ~Qwer re~ion s~ that the slots 43 ,a,re opened. The plate
46 is thus ~etained ~n the bead 41. When the valve shaft 24
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is ~u~thex depressed, the pla~te 46 cQ~es to rest on the se~t
44 and is held below the double bead 41.
The adyantage o the stxucture according ta ~igures
2 and 3 lies in the fact that a riser 48 is secured to the
short feed pipe 42. This has the result that the contents of
the can 2 can be processed in any position. The fact that the
plate 46 rests on the seat 44 ensures that no connection exists
between the can space and the inside space of the sleeve 35.
A sleeve having a structure similar to that in Figure
2 and 3 is shown in Figure 4. The starting position of the
plate 46 and of the container 40 is shown in dotted outline.
When the plate 46 is engaged in the double bead 41, the component
flows from the broken or opened container 40 through the open-
ings 43. A diaphragm 49 is provided so that the liquid cannot
flow off through the short feed pipe 42. When the flow of the
component through the opening 43 is completed, the plate 46 is
brought into the position shown in Figure 4, i.e., below
the double bead 41, in which it closes the openings 43.
When upon completion of the mixing of the components, the
contents of the can 2 are processed, the diaphragm 49 is de-
stroyed by the internal pressure of the can and the processing
of the can contents can be carried out. It is self-evident
that the container 40 is destroyed or opened with the dosing
valve 20 closed, i.e., the outlet duct of the valve. In
Figure 1, the axial duct 25 is closed by a removable seal (not
shown in detail),. Onl~ when the mixing of the components is
completed iS this se,a,l det,a,ched, whexeupon the diaphragm 49
iS de~t~o~e,d when the yalye is ope,ned,
In Pl;gu~e 5 the c~nta,~nex 40 i~, a, holl~w ring~
3Q dispo,~ed ~n the peripher~ of the connecting part 15, On the
inside ~ the connect~n~ paxt 15 the moving part 45 is a xoo~-
shaped plate 51 provided with openings 5Q. Beads 52 and 53,
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against which the container 40 and the plate 51 abut, are
provided on the connecting Rart 15 on the inside and on the
periphery, ~hen the flange cutoff 27 of the valve shaft 24
is moved down~ards, the cylindrical connecting part 15 is spread
apart, whereby the container 40 is bxoken for example, when it is
made of glass, or opened. In the structure accordlng to Figure
5 it is also possible to arrange several containers 40 on
the periphery of the connecting part 15. The advantage of
this embodiment lies in the fact that the upper empty space
10 of the can 2 can be kept relatively small. The component
flowing out of the container 40 can be mixed with the other
component by shaking the can 2. In this structure (see Fig.
S) a r'iser 48 can also be used.
In Figure 6 the connecting part 15 comprises a roof-
shaped plate 55 whose ends extend through openings 56 in
the wall of the connecting part 15. When the flange cutoff 27
presses on the bar 55, the connecting part 15 is spread apart
by cams 57, whereby the external container 40 is broken
or opened.
The connecting part 15 is preferably made of a
suitable plastic material, which is sufficiently non-deformable
to cause the destruction or opening of the container 40.
However, it is possible to deform the connecting part 15 by
means of the moving member 45 so that the container 40 can be
broken or opened. The slots 43 can be opened with the aid
of the double beads 41. The MoVing member 45 also is desirably
made of plastics, while the container 4~ may be made
fro~ ~l,a,s,,s oX pl~sticS.
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