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Патент USA US3035786

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May 22, 1962
Filed Aug. I3, 1959
' 2 Sheets~Sheet 1
,. 75
Gusnq VMEMP:
BY 44d
May 22, 1962
Filed Aug. 15, 1959
2 Sheets-Sheet 2
Gusnq viii 5M1?
BY A26’.
United States Patent tlice
Patented May 22, 1962
Smoothing is performed preferably by bars placed
Gustav Klernp, Morsbach (Sieg), Germany
Filed Aug. 13, 1959, Ser. No. 833,485
Claims priority, application Germany Aug. 14, 1958
4 Claims. (Cl. 239-—186)
The present invention relates to an apparatus for apply
ing plastic material, more particularly prepared mortar
or plaster, to a wall surface and distributing it so that the
above and below the mortar container which bars are
hydraulically or pneumatically pressed against the wall
and lifted away therefrom.
The actual smoothing operation is performed prefer
ably by a smoothing bar having a knife edge at the top
and a relatively blunt lower edge which is about 2 mm.
closer to the wall to which the plastic material is applied
than the top edge.
Control is effected by means of a single central control
handle to which are attached actuating levers and keys
for the several valves. It is preferable to so arrange the
valve controlling the ?ow of the hydraulic or pneumatic
plastered surface lies in a vertical plane, whether the wall
?uid governing the vertical travel of the mortar box and
surface be undulating, pitted, not normal to the floor, or
not straight when viewed in a horizontal plane.
15 related components that the valve is actuated by rotating
the control handle. The valves controlling the jacks for
An object of the invention resides in the provision of
the scraping and smoothing mechanisms are preferably
an apparatus for applying plastic material to a wall where
actuated ‘by pressure keys whilst the rows of nozzles are
by the applied material is perfectly smooth.
cut in and out of operation by hand levers. If the pres
Another object of the present invention is to provide
sure keys and hand levers are mounted on the rotating
an apparatus which will apply a continuous layer of
control handle, the rate of advance of the mortar box,
plastic material to a wall in vertical strips of any required
the pressure of the scraping and smoothing means and
Width from ?oor to ceiling.
the rate of ?ow of the jets of mortar can be adjusted
A further object of the invention is the provision of an
easily and quickly so that, if there are any irregularities
apparatus for applying plastic material to a wall whereby
excess material which is removed when smoothing the 25 in the wall surface to which the mortar is applied, the
operator can immediately make the necessary corrections.
wall surface drops back into the container for the plastic
The convenient means for making corrections, together
with the vertical guide mechanism of the apparatus,
An object of the present invention is the provision of
afford production of an accurately plane, vertical plas
a central control arrangement for a mortar applying
apparatus whereby all necessary operations such as the 30 tered wall surface.
A substantial advantage of the present invention resides
application of the plaster or mortar, scraping and smooth
ing it and the rate at which the work is being performed
can be controlled from a single central position.
in the fact that the necessary operations can be carried
out at any desired timing. This makes it possible ?rst
to allow the freshly applied mortar to set a little before
In the apparatus or plastering machine ‘according to
the invention the plaster is applied by means of two 35 smoothing. In addition, the scraping and smoothing at
tachments can easily be guided both horizontally and ver
horizontal rows of nozzles arranged one above the other
tically by means of the control system according to the
on a divided mortar container, the upper row of nozzles
invention so that the operator can readily lift the smooth
emitting obliquely upwardly inclined jets of mortar and
ing tools away from the wall along an arcuate path
the lower row producing horizontal jets. Compressed air
tangent to the plastered surface, without tearing holes into
or another suitable ?uid under pressure is used for blow
the surface just smoothed over.
ing the material through the nozzles. The width of the
A further advantage of the plastering machine accord
wall area to which the plaster is applied can be deter
ing to the invention consists in the fact that plastered
mined by cutting out individual nozzles or pairs of
strips located side ‘by side will blend into each other with
nozzles one above the other. The row of nozzles emit
ting the oblique upwardly inclined jets is used for plaster 45 out discontinuity; this is achieved by making the scrap
ing and smoothing bars of a length such that they extend
ing the part of the wall immediately below the ceiling.
beyond the widths of the rows of nozzles.
The divided mortar container comprises an ordinary
An embodiment of the invention will now be described
mortar container with a partition attached to the front
in greater detail by way of example with reference to the
of the mortar container and extending rearwardly and
upwardly. Since with such an arrangement the two com 50 accompanying drawings in which:
FIG. 1 is a ‘diagrammatic vertical part sectional illus—
partments of the mortar container are open at the top
tration of a mortar applying apparatus according to the
container thereinto; excess mortar discharged into the
FIG. 2 is a View of the apparatus according to FIG. 1
upper compartment will then ?ow into the lower com
partment over the upper edge of the partition.
55 as seen from the wall surface to which the mortar is
The front wall of the container is preferably inclined
FIG. 3 is a schematic side view of a machine accord
forwardly so that any plaster scraped off above the con
ing to the invention.
tainer will be collected by the inclined front wall and
Referring more particularly to the drawing, a mortar
dropping of mortar or plaster to the ?oor is avoided.
In order that the plastering machine may be used in 60 container 1 which tapers downwardly is divided by a
partition 2 into a smaller upper compartment 3 and a
any location the mortar container is preferably mounted
larger lower compartment 4. Above the mortar con
on a support capable of moving sideways on rails so that
tainer is a smoothing bar 5 and a hinged scraper or dis
juxtaposed vertical strips of the wall can be covered suc
tributor bar 6; a smoothing tool 11 is below the container
‘they can be replenished simply by emptying a storage
The quantity of mortar issuing from each individual 65 1. The smoothing bar 5 is actuated by the plunger of
a hydraulic or pneumatic jack 13, the smoothing bar 11
nozzle is regulated preferably by throttling the compressed
air fed to each nozzle, preferably from a common control
being connected to a plunger 12a of a hydraulic or pneu
matic jack 12. The scraper 6 is movably connected to
the plunger actuating the bar 5 by means of an arm 6a.
Vertical movement of the unit consisting of the mortar
container and the nozzles is eifected by mounting the unit 70 The said hydraulic or pneumatic jacks and the container
1 are mounted rigidly upon a base plate 14 which is
on a base which is vertically movable on a frame and
guided by means of rollers 16 and 17 to move along a
actuated either pneumatically or hydraulically or by other
framework indicated diagrammatically at 15.
suitable, conventional means.
Two horizontal pipes 7 and 9, provided with a row of
nozzles 7a and 9a, respectively, are placed inside the
container 11. The nozzles 7a extend horizontally forward
(as shown in FIG. 1) whilst the nozzles 9a are inclined
upwardly. Openings 27 are provided in the front wall of
the container 1 in the path of the jets issuing from the
nozzles 7a, and openings 26 are provided in front of the
46 receiving pressure ?uid through a pipe 47 from a
source of supply, not shown.
I claim:
1. An apparatus for applying plastic material to a wall
comprising, in combination, a base element, an upright
mounted on said base element, a base member vertically
movable along said upright, a container supported by said
base member, said container having a front wall facing
the wall to which the plastic material must be supplied,
nozzles 9a. If compressed air issues from the said noz
zles, the mortar contained in the chambers 4 and 3' will
be carried along, forming jets of mortar 8 and 10, respec 10 a horizontal row of apertures provided in the lower por
tively. The flow of compressed air in the pipes 7 and 9
tion of said front wall, an outlet nozzle for a pressure
is regulated by means of levers 21 and 22, respectively,
?uid associated with each of said apertures and mounted
which actuate conventional valves located in a block 18
in said container for blowing plastic material from said
receiving compressed air from a supply pipe 25.
?ow of compressed air to the jacks 12 and 13 is con
container through said apertures in substantially horizon
15 tal direction, said front Wall of said container having an
trolled by manipulating keys 23 and 24, respectively,
upper portion reclining from a horizontal line, a hon'zon—
tal row of apertures in said reclining wall portion, and
which actuate suitable conventional valves located in the
block 18.
an outlet nozzle for a pressure ?uid associated with each
The block 18 can also be rotated about an axis 18a
of said last mentioned apertures and mounted in said
by manipulating handles 19 and 20 which are rigidly 20 container for blowing plastic material from said con
connected to the block 18. Rotation of the block 118 in
tainer through said last mentioned apertures in an up
wardly inclined direction.
one or the other direction ‘by means of the handles 19, 20
causes actuation of a valve, not shown and connected to
2. An apparatus as de?ned in claim 1 comprising a
the block 13, for controlling the ?ow of a pressure ?uid
partition in said container, dividing the latter into a
lower chamber including said lower portion of said front
to or from a pneumatic or hydraulic motor, not shown,
wall and supplying plastic material to the apertures in
actuating a rope drum 34 (FIG. 3) for raising or lower
ing the base plate 14 and the devices attached thereto.
the lower portion of said front wall, and into an upper
chamber including said reclining wall portion and supply
Compressed air or a ?uid under pressure ?ows to the
block 18 and therefrom to the valves controlled by the
ing plastic material to the apertures in the reclining por
aforedescribed operating handles, which are arranged in 30 tion of said front wall.
3. An apparatus as de?ned in claim 1 including a pipe
a cluster, through a hose 25.
to which the nozzles associated with the apertures in the
FIG. 2 shows the mortar box 1 as viewed from the
lower front wall portion are connected for supplying
wall. against which the nozzles are directed, showing
particularly the location of the openings 26 and 27. The
pressure ?uid to said nozzles, and a pipe to which the
smoothing bar 5 and the scraper bar 6 located above the
nozzles associated with the apertures in said reclining
mortar box are actuated by plungers 13a of the jacks 13.
front wall portion are connected for separately and inde
The jets 10 are directed upwardly for applying plaster
pendently supplying pressure ?uid to said last- mentioned
to the corner of a wall and a ceiling. The bar 5 can be
turned upward to be pressed into the corner.
The smoothing tool 11 connected to the plungers 12a
of the jacks .12 is seen below the container 1. Numerals
4. An apparatus ‘according to claim 3 including a ?ex
ible pressure ?uid conduit connected to each of said pipes,
and a valve in each of said conduits for selectively con
28 and 29 designate bars supporting the mortar container
1 and rigidly attached to the base plate 14.
trolling supply of pressure ?uid to said pipes.
FIG. 3 is a schematic side view of a complete appara
tus according to the invention. The container 1 for the 45
plastic material is supported ‘by the base 14 which rolls
by means of rollers 16 and 17 on the frame 15. The base
114 hangs on a rope 30 running over a roller 31 mounted
on an extension 32 of the frame 15. The rope is guided
by a roller 33 wherefrom it runs on a drum 34 which 50
may ‘be driven by a pressure ?uid actuated motor, not
shown. The roller 33 and the drum 34 are supported by
a base element 40 to which a support 41 for the valve
block 18 is connected. The latter receives pressure ?uid
through the supply conduit '25. from a storage container 55
References Cited in the file of this patent
Higgins .. ____________ __ June 16, 1914
Marquess _____________ __. Oct. 15,
Morelli ______________ __ Mar. 24,
Dunn _______________ __ June 21,
Robinson ____________ __ Dec. 13,
Hensel _________ _; ____ __ May 1, 1951
Switzerland ___________ __ Oct. 31, 1958
Great Britain _________ __ Oct. 20, 1954
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