U.S. patent number 3,831,851 [Application Number 05/244,181] was granted by the patent office on 1974-08-27 for spray installation for highly-filled dispersions.
This patent grant is currently assigned to Tirama AG. Invention is credited to Hans Peter Gsell, Friedrich Kunzler.
United States Patent |
3,831,851 |
Gsell , et al. |
August 27, 1974 |
SPRAY INSTALLATION FOR HIGHLY-FILLED DISPERSIONS
Abstract
A spray installation for highly-filled dispersions comprising a
pressure container for a dispersion which at its lower end
possesses an outlet connection for the dispersion and at its upper
end an inlet connection for compressed air. The pressure container
further is equipped with a removable cover having a flange bearing
against a flange at the container body. The cover is retained at
the container body through the agency of a clamping ring closure
which engages over the flanges. A compressed air device is
connected via a conduit with the inlet connection of the pressure
container. There is also provided a blower mechanism and a spray
gun. The spray gun is coupled via a dispersion feed line with the
outlet connection of the pressure container and via an air conduit
with the blower mechanism.
Inventors: |
Gsell; Hans Peter (Baar,
CH), Kunzler; Friedrich (Roggwil, CH) |
Assignee: |
Tirama AG (Zug,
CH)
|
Family
ID: |
4309902 |
Appl.
No.: |
05/244,181 |
Filed: |
April 14, 1972 |
Foreign Application Priority Data
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Apr 30, 1971 [CH] |
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6455/71 |
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Current U.S.
Class: |
239/175; 239/372;
239/373; 239/417.3 |
Current CPC
Class: |
E04F
21/12 (20130101) |
Current International
Class: |
E04F
21/02 (20060101); E04F 21/12 (20060101); B05b
007/26 () |
Field of
Search: |
;239/143,172,175,325,372,373,417.3,424,526 ;222/193 ;259/151
;220/55AN,3 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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530,001 |
|
Dec 1940 |
|
GB |
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703,667 |
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Apr 1966 |
|
IT |
|
Primary Examiner: Wood, Jr.; M. Henson
Assistant Examiner: Love; John J.
Attorney, Agent or Firm: Kleeman; Werner W.
Claims
What is claimed is:
1. A spray installation for materials, especially highly-filled
dispersions, comprising, in combination:
a. a pressure container including a container body for housing a
dispersion and having a lower end region and an upper end
region;
b. outlet connection means for the dispersion provided at the lower
end region of the pressure container and an inlet connection means
for compressed air provided at the upper end region of the pressure
container;
c. a removable cover member provided for said pressure container,
said removable cover member having a flange;
d. said container being provided with a flange, and the flange of
said cover member bearing against the flange of said pressure
container;
e. a single clamping ring closure means engaging with said flanges
for securing the cover member to said container body of the
pressure container;
f. a compressed air device;
g. conduit means for connecting the compressed air device with said
inlet connection means of the pressure container;
h. a blower mechanism;
i. a spray gun;
j. a dispersion feed conduit means for connecting said spray gun
with said outlet connection means of the pressure container;
k. air conduit means for connecting of said spray gun with said
blower mechanism; and
l. at least one of said flanges possesses a substantially
ring-shaped groove in which there is arranged a cushion and upon
said cushion a sealing O-ring member.
2. The spray installation as defined in claim 1 wherein said
substantially ring-shaped groove is provided at the flange of said
cover member.
3. A spray installation for materials, especially highly-filled
dispersions, comprising, in combination: a pressure container
including a container body for housing a dispersion and having a
lower end region and an upper end region; outlet connection means
for the dispersion provided at the lower end region of the pressure
container and an inlet connection means for compressed air provided
at the upper end region of the pressure container; a removable
cover member provided for said pressure container, said removable
cover member having a flange; said container being provided with a
flange, and the flange of said cover member bearing against the
flange of said pressure container; clamping ring closure means
engaging with said flanges for securing the cover member to said
container body of the pressure container; a compressed air device;
conduit means for connecting the compressed air device with said
inlet connection means of the pressure container; a blower
mechanism; a spray gun; a dispersion feed conduit means for
connecting said spray gun with said outlet connection means of the
pressure container; air conduit means for connection of said spray
gun with said blower mechanism, said clamping ring closure means
being formed of at least two parts, wherein the parts at one side
are hingedly connected with one another and at the other side are
connected with one another by means of a quick closure mechanism,
said quick closure mechanism being constructed as a safety closure
which can only be opened after said pressure container is relieved
of pressure, and the parts of the clamping ring closure means
include respective end portions supporting said safety closure,
each of said end portions incorporating a projection having an
opening, wherein the projections in the closed position of said
safety closure are located in front of one another and the openings
are in alignment, a connection nipple provided for said inlet
connection means for the compressed air extending through said
openings so that in order to open said safety closure it is first
necessary to remove said connection nipple.
4. The spray installation as defined in claim 3, wherein said
connection nipple is provided with a polyhedral profile member, a
compressed air coupling supported by said connection nipple, one of
said projections being externally located with respect to the other
projection and equipped with a ring flange surrounding said
polyhedral profile member of the connection nipple so that said
profile member is only accessible by means of a socket wrench and
with the compressed air coupling released.
5. The spray installation as defined in claim 3, wherein said
container has a container opening which is closed by said cover
member, and wherein said container opening is at least
approximately as large as the cross-section of the container
body.
6. The spray installation as defined in claim 3, wherein said spray
gun possesses a material nozzle having a mouth and a dispersion
channel having a tapering cross-section terminating at said
material nozzle, said dispersion channel having a portion disposed
behind said material nozzle which extends linearly, an air channel
coaxially arranged with regard to said linearly extending portion
of said dispersion channel and surrounding said linearly extending
portion, said air channel terminating at an air nozzle, said air
nozzle having an opening which surrounds said mouth of the material
nozzle.
7. The spray installation as defined in claim 6, wherein the
opening of said air nozzle is adjustable in axial direction with
regard to said mouth of the material nozzle.
8. The spray installation as defined in claim 7, wherein said air
channel possesses approximately twice the crosssection of said
dispersion channel.
9. The spray installation as defined in claim 8, wherein said spray
gun possesses a mouth portion and a gun handle which forms an
obtuse angle with the mouth portion of the spray gun, a connection
stud for the dispersion feed conduit means at the end of the gun
handle, said dispersion channel extending through said gun handle
up to said connection stud.
10. The spray installation as defined in claim 9, wherein said
obtuse angle amounts to approximately 115.degree..
11. The spray installation as defined in claim 9, wherein the
dispersion feed conduit possesses a larger cross-section than that
of the dispersion channel of the spray gun, and wherein said spray
gun is provided with a reducing portion following said connection
stud for the dispersion feed conduit means, said reducing portion
possessing a converging angle.
12. The spray installation as defined in claim 11, wherein said
converging angle of said reducing portion amounts to at most
20.degree..
13. The spray installation as defined in claim 3, wherein said
spray gun is provided with a reducing- and shut-off element.
14. The spray installation as defined in claim 13, wherein said
spray gun possesses a connection means for said dispersion feed
conduit means, said reducing- and shut-off element being connected
with said connection means of said dispersion feed conduit
means.
15. The spray installation as defined in claim 3, wherein said
spray gun possesses a reducing- and shut-off element.
16. The spray installation as defined in claim 15, wherein said
reducing- and shut-off element is operably connected with said air
conduit means.
17. The spray installation as defined in claim 3, further including
a travelling carriage for supporting said pressure container, said
compressed air device and said blower mechanism.
18. The spray installation as defined in claim 17, wherein said
pressure container is provided at its lower end with leg means and
coupling means for releasably connecting the pressure container
with the travelling carriage.
19. A spray installation for materials, especially highly-filled
dispersions, comprising, in combination:
a. a pressure container including a container body for housing a
dispersion and having a lower end region and an upper end
region;
b. outlet connection means for the dispersion provided at the lower
end region of the pressure container and an inlet connection means
for compressed air provided at the upper end region of the pressure
container;
c. a removable cover member provided for said pressure container,
said removable cover member having a flange;
d. said container being provided with a flange, and the flange of
said cover member bearing against the flange of said pressure
container;
e. a single clamping ring closure means engaging with said flanges
for securing the cover member to said container body of the
pressure container;
f. a compressed air device;
g. conduit means for connecting the compressed air device with said
inlet connection means of the pressure container;
h. a blower mechanism;
i. a spray gun;
j. a dispersion feed conduit means for connecting said spray gun
with said outlet connection means of the pressure container;
k. air conduit means for connection of said spray gun with said
blower mechanism;
l. said clamping ring closure means being formed of at least two
parts, wherein the parts at one side are hingedly connected with
one another and at the other side are connected with one another by
means of a quick closure mechanism;
m. said quick closure mechanism including means for constructing
the same as a safety closure which can only be opened after said
pressure container is relieved of pressure; and
n. the parts of the clamping ring closure means include respective
end portions supporting said safety closure, each of said end
portions incorporating a projection having an opening, wherein the
projections in the closed position of said safety closure are
located in front of one another and the openings are in alignment,
a connection nipple provided for said inlet connection means for
the compressed air extending through said openings so that in order
to open said safety closure it is first necessary to remove said
connection nipple.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a new and improved construction of
spray installation for highly-filled dispersions.
Spray installations are already known to the art wherein the
material to be sprayed, sometimes conveniently referred to herein
as the sprayed material, is delivered by compressed air or
conveying pumps to the spray or injection mouth of a spray gun in
order to be distributed by means of compressed air which is at a
lower or higher pressure. Nonetheless spray installations employing
conveying pumps for the sprayed material possess the drawback that
the conveying pumps, during spraying of highly-filled dispersions,
for instance possessing quartz- and fiber constituents are
subjected to extreme wear, can become clogged, and, notwithstanding
the use of expensive and uneconomical regulation devices,
regulation of the conveyed quantity still leaves something to be
desired.
Spray installations which operate with compressed air are basically
suitable for the spraying of highly-filled dispersions, yet do
however possess the considerable drawback that they are not
designed for large material throughput which arises when spraying
highly-filled dispersions. As a result such installations have not
been found to be adequate, so that even at the present time in the
construction industry highly-filled dispersions, especially sprayed
plaster and abrasive plaster possessing quartz- and PVC-granulate
exceeding 1 - 2 mm. grain size, must be manually applied by means
of a plasterer's smoothing trowel.
SUMMARY OF THE INVENTION
Hence from what has been explained above it should be apparent that
this particular technology is still in need of a spray installation
for highly-filled dispersions which is not associated with the
aforementioned drawbacks and limitations of the prior art
proposals. It is therefore a primary object of this invention to
provide a new and improved construction of spray installation for
highly-filled dispersions which is capable of effectively and
reliably fulfilling the existing need in the art and is not
associated with the previously mentioned drawbacks of the
state-of-the-art proposals.
Another and more specific object of the present invention is the
provision of a spray installation for highly-filled dispersions
which, with extremely simple use thereof, renders possible high
throughput of the dispersion, can be economically manufactured and
wear of the spray installation is reduced to a minimum.
Still a further significant object of the present invention relates
to a new and improved spray installation capable of effectively and
reliably handling materials, such as typically highly-filled
dispersions without danger of excessive wear or clogging of the
installation of other malfunction, the spray installation can be
easily used without difficulty even by relatively unskilled
individuals, and wherein handling is relatively simple and easy to
carry out.
Now in order to implement these and still further objects of the
invention, which will become more readily apparent as the
description proceeds, the inventive spray installation for
highly-filled dispersions is manifested by the features that there
are provided:
a. a pressure container for a dispersion which is provided at its
lower end with an outlet connection for the dispersion and at its
upper with an inlet connection for compressed air and which further
possesses a removable cover having a flange bearing against a
flange of the container body, the cover being retained at the
container body by means of a clamping ring closure which engages
the flanges;
b. a compressed air device which is connected via a conduit with
the inlet connection of the pressure container;
c. a blower mechanism; and
d. a spray gun which is connected through the agency of a
dispersion feed line with the outlet connection of the pressure
container and through the agency of an air conduit with the blower
mechanism.
By means of the spray installation as contemplated by this
invention it is possible to faultlessly and quickly spray
highly-filled dispersions of the most different viscosity and
fillings, such as for instance injection or spray plaster, adhesion
plaster formed on the basis of gypsum- and PVC having a quartz- or
PVC-granulate filling exceeding 1mm. grain size, with fiber
filling, such as for instance raw fibers having a fiber component
exceeding 10mm., mortar and so forth. In this connection the size
of the pressure container, the quantity of air and its pressure,
the conduit- and spray gun cross-sections can be preferably
accommodated to the momentarily encountered conditions.
The compressed air device renders possible an extremely simple
conveying or feed of the dispersions and can be accommodated in
most simple manner to most all types of dispersions and is
especially insensitive to wear. By virtue of the provision of the
blower mechanism there is provided a simple air supply for the
spray gun which is independent of the compressed air device. The
compressed air device which is relatively expensive can be
accordingly designed much smaller and it is possible to dispense
with complicated and disturbance-prone pressure reduction
elements.
The arrangement of the pressure container for the dispersion and
which is separate from the spray gun renders possible free
manipulation of the spray gun and a considerably larger supply of
the dispersion to be sprayed. A considerable improvement as
concerns handling and the throughput of the dispersion is realized
for the spraying installation by the construction of the cover and
its attachment by means of the clamping ring closure. Since, above
all, when it is intended to be used at the construction site, the
spraying installation must be easily transportable, so that it is
not possible to design the pressure container to have any randomly
large size. The ideal size of the pressure container preferably is
in the order of magnitude of 60 - 100 liters. Since, for instance,
already for average coarse abrasive plaster there must be sprayed
per hour several hundred liters of highly-filled dispersion, it is
necessary to fill a number of times per hour a pressure container
with a capacity of about 60 - 100 liters. Now since for such
dispersions and with a handy cross-section of the conduits there
are already necessary pressures exceeding 6 - 10 atmospheres
absolute in order to transport the dispersion from the pressure
container to the spray mouth of the spray gun the use of
conventional closures employing a number of screws are slow to
manipulate and uneconomical. On the other hand, the provision of
the clamping ring closure considerably reduces the refilling time
and therefore in a most simple way increases the dispersion
throughput capacity.
The new and improved construction of spray installation as
contemplated by this development possesses a spate of advantages
which could not be realized by any of the heretofore known prior
art proposals of spray installations.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood and objects other than
those set forth above, will become apparent when consideration is
given to the following detailed description thereof. Such
description makes reference to the annexed drawings wherein:
FIG. 1 is a side view of a pressure container, a compressed air
device and a blower mechanism of a spray installation mounted upon
a travelling carriage or frame;
FIG. 2 is a rear view of the components of the spray installation
depicted in FIG. 1;
FIG. 3 illustrates in side view and partially sectional view the
arrangement of the cover and clamping ring closure at the pressure
container;
FIG. 4 is a fragmentary view of the arrangement of FIG. 3 also in
section directly in front of the hinge of the clamping ring
closure; and
FIG. 5 is a longitudinal sectional view of the spray gun.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Describing now the drawings, in FIGS. 1 and 2 there is illustrated
a preferred embodiment of inventive spray installation embodying a
pressure container 1 which is equipped with three legs or supports
2. The floor 3 of the pressure container 1 is advantageously
economically constructed as a semi-sphere, i.e., possesses a
hemispherical configuration, even through a conical shape having a
cone angle of 90.degree. would be more advantageous. The
semi-spherical shape, which is less complicated to manufacture than
the conical shape, possesses approximately the same advantages as
the conical shape. Even when processing coarse grain dispersions of
low viscosity the conical shape completely prevents the presence of
a funnel at the container content whereas the semi-spherical shape
extensively prevents the presence of such funnel at the container
content during the spraying operation, therefore insures for
complete emptying of the pressure container 1. Residues at the
pressure container 1 reduce the useful space and therefore the
throughput for a given container pressure, container content and
conduit cross-section. Sprayed material which tends to settle at
the floor 3 of the pressure container 1 leads to the formation of
conglomerates or lumps, and thus to clogging of the conduits and
the spray gun. The central portion of the pressure container 1, the
actual material container, is formed by a cylindrical tubular body
member 1a at the upper end of which there is secured a domed cover
member 4 by means of a clamping or locking ring closure 11.
Details of the construction of the clamping ring closure 11 can be
best ascertained by referring to FIGS. 3 and 4. Both the cover
member 4 as well as the container body 1a each possess a respective
flange 6 and 7, the flanges being formed for instance of steel
rings welded to the remaining parts of such cover member and
container body respectively. The lower flange 7 secured to the
container body 1a only slightly reduces the cross-section of the
pressure container-cylindrical tube body, so that the useful
filling opening 1b amounts to at least 95 percent of the
cross-section of the cylindrical tubular body 1a. This opening 1b
renders possible proper filling of the dispersion directly from a
conventional material barrel or the like and simultaneously
facilitates cleaning of the pressure container 1. A substantially
ring-shaped groove or recess 8 is machined at the flange 6 of the
cover member 4 at its contact face 6a', and into which there is
inserted upon a cushion 9 or equivalent device, preferably formed
of foam or cellular rubber, a sealing O-ring 10, for instance
formed of nitrile, i.e., nitrile silicone rubber, 75.degree. Shore
hardness. The cushion 9 increases the pressure play for the sealing
O-ring member 10 which presses and seals against the lower flange 7
of the container body 1a. Consequently, any present irregularities
or unevenness are compensated to a certain degree.
Both of the flanges 6 and 7 uniformly transmit the forces resulting
during pressure build-up to an infinite number of locations over
the entire periphery onto the clamping ring closure 11 which is
preferably formed from a substantially U-shaped profile into two
halves 11a and 11b and is preferably retained at one side by means
of a hinge 12 and at the other side by means of a safety or
security closure 13.
The security closure 13 possesses two projections or extended
portions 14 and 15 which are welded in an upright position
substantially tangentially perpendicular to a respective ring half.
The projections 14 and 15 are each provided with an opening 16
which in the closed position of the clamping ring closure 11 are
both coaxially aligned with regard to one another as well as with
an inlet connection or stud 17. A connection nipple or stud 18 is
placed through the opening 16 and is threadably connected with the
inlet connection or stud 17. A ring flange 19 is welded in the
opening 16 at the outer projection 15 of the security closure 13.
The connection nipple 18 carries a multiple-edge or polyhedral
profile member 20 which in the threaded-in condition of the
connection nipple 18 is disposed within the ring flange 19. The
arrangement of the polyhedral profile member 20 and the ring flange
19 is chosen such that the connection nipple 18 can be only
tightened or released by means of a socket wrench or equivalent
device. The compressed air conduit or line 22 which extends from a
suitable compressed air device 21 is connected through the agency
of a conventional compressed air coupling 23 with the connection
nipple or stud 18. In order to be able to open the cover member 4
it is thus necessary to initially remove the compressed air conduit
22 by loosening the compressed air coupling 23. As a result the
pressure within the pressure container 1 is released through the
agency of the connection nipple or stud 18. Thereafter it is
possible to threadably remove the connection nipple 18 by means of
the socket wrench. Only then is it possible to open the clamping
ring 11 and remove the cover member 4. Consequently, the compressed
air within the confines of the pressure container 1 must be
automatically relieved in pressure prior to removal of cover member
4.
The illustrated clamping or locking ring 11 possesses a profile
member 11d having a substantially U-shaped cross-section, wherein
the inner surfaces of the legs 11c of the U-portion of the U-shaped
profile 11d converge towards the base 11e of such U-shaped profile
11d. Thus, upon applying the clamping ring 11 the flanges 6 and 7
of the cover and the container body respectively are pressed
together owing to the wedge action exerted by the converging inner
surfaces of the legs 11c of the clamping ring 11. This action could
also be realized by utilizing a clamping ring having substantially
V-shaped cross-section.
In contrast to the illustrated embodiment it would also be possible
for the outer surfaces 6a and 7a of the flanges 6 and 7 to converge
towards the outside and the inner surfaces of the legs 11c to
extend parallely. It is also possible to combine both measures.
Furthermore, the clamping ring 11 can be also constructed formed of
a number of parts, wherein the individual segments are hingedly
connected with one another. It is also possible to construct the
inner surfaces of the legs of the U-portion of the clamping ring as
well as also the outer surfaces of the flanges of the cover and the
container body to be parallel to one another. Then the seal formed
for instance from the previously discussed cushion 9 and the
sealing O-ring 10 could be so elastic that for the purpose of
applying the clamping ring such could be compressed to such an
extent that the clamping ring could be slipped over the
flanges.
Finally there is also present the further possibility of
constructing the seal between the cover and container body 1a to be
so elastic that it is compressed together by the weight of the
cover member to such an extent that the clamping ring 11 is loosely
seated at the flanges 6 and 7 when the pressure container 1 is
without pressure. Only during the operating pressure do the flanges
6 and 7 of the cover member 4 and the container body 1a come to
bear against the clamping ring 11. The seal thus expands owing to
its inherent elasticity to such an extent that the pressure
container is also absolutely tight in the operating condition.
The pressure container 1 (material vessel) stands upon the three
legs 2 secured to the floor of the container 1 and can be raised
and transported by means of two handgrips 24 (FIG. 2). In the
sealed condition it is advantageous to transport the pressure
container 1 by means of the travelling carriage 25 or equivalent
structure. This travelling carriage 25 is transported until it has
arrived at the pressure container 1 and such container is then
suspended at its lower end by means of two holding plates 26 (only
one of which is shown) applied at the carriage and two brackets 27
(only one of which is shown) secured to the pressure container 1 at
the carriage 25 and at its top or upper region is secured by means
of the centering bolts 28 or equivalent. The travelling carriage 25
supports the compressed air device 21 which possesses a compressor
29 for producing the high air pressure in the pressure container 1
for feeding the dispersion to the spray gun. Further, there is
arranged at the travelling carriage 25 the blower mechanism 30 for
producing the compressed air at low pressure serving to distribute
the dispersion, preferably at a pressure below about 0.3
kp/cm.sup.2. Both units are powered by separate electric motors
which are directly flanged therwith and advantageously designed for
connection with the standard light power current network. The
housing 30a of the blower mechanism 30 is constructed at one side
as an instrument panel 31 containing an electric switch, a
manometer and a compressed air regulating valve of standard
construction, as schematically indicated. The upper sheet member
cover or plate of the housing is designed as a tool box 32 in which
there can be accommodated the socket wrench for the connection
nipple 18, the spray gun such as gun 35 of FIG. 5, and the other
tools and accessories.
The sprayed material emanating from the outlet connection or stud
33 of the pressure container 1 is conducted by means of a hose of
suitable cross-section to the connection stud 34 of the spray gun
35 of FIG. 5. At the connection stud 34 there merges a channel 36
of the spray gun 35 which serves to guide the dispersion to be
sprayed. In the dispersion channel 36 there is arranged immediately
after the connection stud 34 a reduction component 37 having a
conical-shaped throughpassage opening 37a in order that the
dispersion channel 36 can be reduced in cross-section relative to
the hose infeed, in order to reduce as much as possible the
dimensions and weight of the spray gun 35. The cone of the reduced
portion should be designed so as to possess an angle which is as
acute as possible and should not exceed an angle of about
20.degree.. The spray gun 35 possesses a gun handle 37 at the lower
end of which there is arranged the connection stud 34 and which
further possesses at the lower portion merging with the reduction
portion 37 reduction- and shut-off element 38, for instance in the
form of the stopcock illustrated in FIG. 5. The dispersion channel
36 is introduced above the gun handle 37 into an air conduit or
pipe 39, the cross-section of which is approximately twice as large
as that of the dispersion channel 36. The gun or pistol handle 37
and therefore also the first portion of the dispersion channel 36
form with the front portion of the air conduit 39 an obtuse angle,
amounting preferably to 115.degree. . If the angle is selected to
be larger then the spray gun is not very handy; if it is reduced
then the dispersion channel will be curved much too strongly and
coarse grained material will tend to become lodged at the curved
portion and will lead to clogging.
The air conduit 39 is open towards the rear and is connected by
means of a hose of suitable cross-section with the blower mechanism
30. At the air conduit end there can be arranged a reduction- and
shut-off element of conventional construction and merely
schematically indicated in FIG. 5 by reference character 50. The
dispersion channel 36 and the air conduit 39 are extended coaxially
linearly towards the front and terminate at the material nozzle 40
and the air nozzle 41. The material nozzle 40 is fixedly threadably
connected with the conduit of the dispersion channel 36. The air
nozzle 41 can be displaced with respect to the material nozzle 40
for the purpose of regulating the air flow by means of the
threading 42. The material- and air nozzles are designed so as to
possess a conical-shape, the cone angle of which can be varied
depending upon the properties of the dispersion to be sprayed and
the required application finish.
Since the spray gun 35 is operated with blower air of the lowest
pressure (from 0.1 kp/cm.sup.2) it is essential that the blower air
be linearly guided to the air nozzle 41 without any hindrance in a
coaxial tube arranged about the dispersion channel. In order that
there can be used an inexpensive low pressure blower, for instance
a vacuum cleaner blower, the air conduit cross-section must be
selected to be so large that the air velocity at the conduit is
below 12 meters per second.
The inventive construction of pressure container with the clamping
ring closure is not only suitable for spray installations for
highly-filled dispersions, rather can also be used for the most
different other purposes, especially for such where the pressure
container for instance for refilling and cleaning purposes must be
more frequently opened.
While there is shown and described present preferred embodiments of
the invention, it is to be distinctly understood that the invention
is not limited thereto but may be otherwise variously embodied and
practiced within the scope of the following claims.
* * * * *