US3035776A

US3035776A - Apparatus for applying, distributing and smoothing plastic material to a wall surface

Info

Publication number: US3035776A
Application number: US833485A
Authority: US
Inventors: Klemp Gustav
Original assignee: Individual
Current assignee: Individual
Priority date: 1958-08-14
Filing date: 1959-08-13
Publication date: 1962-05-22
Anticipated expiration: 1979-05-22

Description

May 22, 1962 G. KLEMP 3,035,776

APPARATUS FOR APPLYING, DISTRIBUTING AND SMOOTHING PLASTIC MATERIAL TO A WALL SURFACE Filed Aug. I3, 1959 2 Sheets-Sheet 1 INVENTOR Gusn VMEMP:

BY 44d ATTORNEY y 1962 G. KLEMP 3,035,776

APPARATUS FOR APPLYING, DISTRIBUTING AND SMOOTHING PLASTIC MATERIAL TO A WALL SURFACE Filed Aug. 15, 1959 2 Sheets-Sheet 2 INVENTOR Gusnq viii 5M1? BY A26.

ATTO R N EY United States Patent 3,035,776 Patented May 22, 1962 tlice APPARATUS FOR APPLYING, DISTRIBUTING AND SMOOTHING PLASTIC MATERIAL TO A WALL SURFACE 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 applying plastic material, more particularly prepared mortar or plaster, to a wall surface and distributing it so that the plastered surface lies in a vertical plane, whether the wall surface be undulating, pitted, not normal to the floor, or not straight when viewed in a horizontal plane.

An object of the invention resides in the provision of an apparatus for applying plastic material to a wall whereby the applied material is perfectly smooth.

Another object of the present invention is to provide an apparatus which will apply a continuous layer of plastic material to a wall in vertical strips of any required Width from floor to ceiling.

A further object of the invention is the provision of an apparatus for applying plastic material to a wall whereby excess material which is removed when smoothing the wall surface drops back into the container for the plastic material.

An object of the present invention is the provision of a central control arrangement for a mortar applying apparatus whereby all necessary operations such as the application of the plaster or mortar, scraping and smoothing it and the rate at which the work is being performed can be controlled from a single central position.

In the apparatus or plastering machine according to the invention the plaster is applied by means of two horizontal rows of nozzles arranged one above the other on a divided mortar container, the upper row of nozzles emitting obliquely upwardly inclined jets of mortar and the lower row producing horizontal jets. Compressed air or another suitable fluid under pressure is used for blowing the material through the nozzles. The width of the wall area to which the plaster is applied can be determined by cutting out individual nozzles or pairs of nozzles one above the other. The row of nozzles emitting the oblique upwardly inclined jets is used for plastering the part of the wall immediately below the ceiling.

The divided mortar container comprises an ordinary mortar container with a partition attached to the front of the mortar container and extending rearwardly and upwardly. Since with such an arrangement the two compartments of the mortar container are open at the top they can be replenished simply by emptying a storage container thereinto; excess mortar discharged into the upper compartment will then flow into the lower compartment over the upper edge of the partition.

The front wall of the container is preferably inclined forwardly so that any plaster scraped off above the container will be collected by the inclined front wall and dropping of mortar or plaster to the floor is avoided.

In order that the plastering machine may be used in any location the mortar container is preferably mounted on a support capable of moving sideways on rails so that juxtaposed vertical strips of the wall can be covered successively.

The quantity of mortar issuing from each individual nozzle is regulated preferably by throttling the compressed air fed to each nozzle, preferably from a common control position.

Vertical movement of the unit consisting of the mortar container and the nozzles is eifected by mounting the unit on a base which is vertically movable on a frame and actuated either pneumatically or hydraulically or by other suitable, conventional means.

Smoothing is performed preferably by bars placed 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 preferably 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 flow of the hydraulic or pneumatic fluid governing the vertical travel of the mortar box and related components that the valve is actuated by rotating the control handle. The valves controlling the jacks for the scraping and smoothing mechanisms are preferably actuated by pressure keys whilst the rows of nozzles are cut in and out of operation by hand levers. If the pressure keys and hand levers are mounted on the rotating control handle, the rate of advance of the mortar box, the pressure of the scraping and smoothing means and the rate of fiow of the jets of mortar can be adjusted easily and quickly so that, if there are any irregularities in the wall surface to which the mortar is applied, the operator can immediately make the necessary corrections. The convenient means for making corrections, together with the vertical guide mechanism of the apparatus, afford production of an accurately plane, vertical plastered wall surface.

A substantial advantage of the present invention resides in the fact that the necessary operations can be carried out at any desired timing. This makes it possible first to allow the freshly applied mortar to set a little before smoothing. In addition, the scraping and smoothing attachments can easily be guided both horizontally and vertically by means of the control system according to the invention so that the operator can readily lift the smoothing tools away from the wall along an arcuate path tangent to the plastered surface, without tearing holes into the surface just smoothed over.

A further advantage of the plastering machine according to the invention consists in the fact that plastered strips located side by side will blend into each other without discontinuity; this is achieved by making the scraping and smoothing bars of a length such that they extend beyond the widths of the rows of nozzles.

An embodiment of the invention will now be described in greater detail by way of example with reference to the accompanying drawings in which: 7

FIG. 1 is a diagrammatic vertical part sectional illus tration of a mortar applying apparatus according to the invention.

FIG. 2 is a View of the apparatus according to FIG. 1 as seen from the wall surface to which the mortar is applied. I

FIG. 3 is a schematic side view of a machine according to the invention.

Referring more particularly to the drawing, a mortar container 1 which tapers downwardly is divided by a partition 2 into a smaller upper compartment 3 and a larger lower compartment 4. Above the mortar container is a smoothing bar 5 and a hinged scraper or distributor bar 6; a smoothing tool 11 is below the container 1. The smoothing bar 5 is actuated by the plunger of a hydraulic or pneumatic jack 13, the smoothing bar 11 being connected to a plunger 12a of a hydraulic or pneumatic jack 12. The scraper 6 is movably connected to the plunger actuating the bar 5 by means of an arm 6a. The said hydraulic or pneumatic jacks and the container 1 are mounted rigidly upon a base plate 14 which is guided by means of

rollers

16 and 17 to move along a framework indicated diagrammatically at 15.

Two horizontal pipes 7 and 9, provided with a row of

nozzles

7a and 9a, respectively, are placed inside the container 1. 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 nozzles 9a. If compressed air issues from the said nozzles, the mortar contained in the chambers 4 and 3' will be carried along, forming jets of mortar 8 and 10, respectively. The flow of compressed air in the pipes 7 and 9 is regulated by means of

levers

21 and 22, respectively, which actuate conventional valves located in a block 18 receiving compressed air from a supply pipe 25. The flow of compressed air to the

jacks

12 and 13 is controlled by manipulating

keys

23 and 24, respectively, which actuate suitable conventional valves located in the block 18.

The block 18 can also be rotated about an axis 18a by manipulating handles 19 and 20 which are rigidly connected to the block 18. Rotation of the block 18 in one or the other direction by means of the handles 19, 20 causes actuation of a valve, not shown and connected to the block 13, for controlling the flow of a pressure fluid to or from a pneumatic or hydraulic motor, not shown, actuating a rope drum 34 (FIG. 3) for raising or lowering the base plate 14 and the devices attached thereto. Compressed air or a fluid under pressure flows to the block 18 and therefrom to the valves controlled by the aforedescribed operating handles, which are arranged in a cluster, through a hose 25.

FIG. 2 shows the mortar box 1 as viewed from the wall against which the nozzles are directed, showing particularly the location of the openings 26 and 27. The smoothing bar and the scraper bar 6 located above the mortar box are actuated by plungers 13a of the jacks 13. The jets are directed upwardly for applying plaster 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

28 and 29 designate bars supporting the mortar container 1 and rigidly attached to the base plate 14.

FIG. 3 is a schematic side view of a complete apparatus according to the invention. The container 1 for the plastic material is supported by the base 14 which rolls by means of

rollers

16 and 17 on the frame 15. The base 1 4 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 may be driven by a pressure fluid 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 fluid through the supply conduit 25. from a storage container 46 receiving pressure fluid 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, a horizontal row of apertures provided in the lower portion of said front wall, an outlet nozzle for a pressure fluid associated with each of said apertures and mounted in said container for blowing plastic material from said container through said apertures in substantially horizontal direction, said front Wall of said container having an upper portion reclining from a horizontal line, a hon'zon tal row of apertures in said reclining wall portion, and an outlet nozzle for a pressure fluid associated with each of said last mentioned apertures and mounted in said container for blowing plastic material from said container through said last mentioned apertures in an upwardly inclined direction.

2. An apparatus as defined in claim 1 comprising a partition in said container, dividing the latter into a lower chamber including said lower portion of said front wall and supplying plastic material to the apertures in the lower portion of said front wall, and into an upper chamber including said reclining wall portion and supplying plastic material to the apertures in the reclining portion of said front wall.

3. An apparatus as defined in claim 1 including a pipe to which the nozzles associated with the apertures in the lower front wall portion are connected for supplying pressure fluid to said nozzles, and a pipe to which the nozzles associated with the apertures in said reclining front wall portion are connected for separately and independently supplying pressure fluid to said lastmentioned nozzles.

4. An apparatus according to claim 3 including a flexible pressure fluid conduit connected to each of said pipes, and a valve in each of said conduits for selectively controlling supply of pressure fluid to said pipes.

References Cited in the file of this patent UNITED STATES PATENTS 1,100,565 Higgins June 16, 1914 1,281,404 Marquess Oct. 15, 1918 1,797,666 Morelli Mar. 24, 1931 1,863,924 Dunn June 21, 1932 2,491,212 Robinson Dec. 13, 1949 2,551,538 Hensel May 1, 1951 FOREIGN PATENTS 333,423 Switzerland Oct. 31, 1958 716,944 Great Britain Oct. 20, 1954