The invention is referred to a itachine driven by an electric irotor and which carries out autαnatically the conventional sleeked coat¬ ing, such as sheatliing and other, by acting on the material alrea- dy present on the wall. The machine is decortiposable and, consequent ly, can be easily transported by a person and mounted in position for prαπpt employ essentially with hand practicability for stabiliz ing and blocking its parts.

po _r carrying out these wall coatings, at present vertical bands are at first carried out at intervals with constant thickness, to per¬ form as leaning collations, then the product is thrown in different ways in the -Intermediate spaces or is levelled by εmx>t-hing with a shaft operated by hand. These operations are carried out exclusive- ly b master masons: if the operation is not carried out with the required skill, in fact, the thickness deformities which can be not ed on the bands are deteπtdning unlevelled surfaces. Furthermore the execution of these operations requires considerable time, becau¬ se the projection of the product on the wall is carried out by means of a manual tool and, in addition, the levelling of the wall must be

SUBSTI UTE SHEET

constantly tested with verticality checking means.

The iiachine according to the present invention enables to carry out the above ^" operations even by a not specialized worker and considerably reduces the working times. This is possible because after having tiiro n the product on the wall with a conventional lance, the product is automatically levelled with only one sequen ce on a length of the wall by a device which operates in constant levelling condition. In this way, ^• vvhen the πachine has been mount ed in working position and the relevant controls have been adjust ed, the coating is carried out with automatic sequences. Substan¬ tially the machine consists of two syriohronously working assαπbli- es fitted on extendable uprights which are available in battery and parallel to the wall to treat, by fixing their feet by pressu re on the pavement and to the ceiling. The operating assembly con sists of a bearing upright on a truck engaged in a longitudinal guide, of a motor assembly which, by means of a rack, allows its up and down movements. The said truck holds an arm which is ortho gonal to the upright bearing an additional motor acting on a warm screw for its extension on coaxial guides. The exter ible ends of the two arms bear a horizontal shaft on imposing par^ equipped with blocking means; on this shaft, another shaft i ^• .-j scs Vhich is in a slcmting position, supported and moved by a pai.. of jacks fitt ed on the extensible parts of the arms using imposers with block- ing means. For starting operation, the machine is fitted in posi¬ tion on the lenght of the wall to treat, the.two operating assembli es are srLngularly fitted by means of the cranks for extending the filling feet, and the verticality is checked by means of the levels fitted on the device, and this one is then blocked in position; the levelling assembly is now mounted by blocking its two cαrtponents in the iiπposers. The upper shaft acts as a pressure conveyer of the product on the levelling lines determined by the lower shaft: this

e ma er a on e wa .

An execution form is illustrated in an indicative way by the draw¬ ings of tables' 1 and 2. With reference to these ones, fig. 1 is the perspective view of the machine already prepared with levell¬ ing assambly which will be brought down to a lower limit for start ing the operation; the length of wall can be noted on which the a chine operates, as weli as -the extendi.ble feet of the uprights which ensures the machine fixed between the floor and the ceiling. Fig. 2 is the back view of the machine according, to the previous drawing. Fig. 3 is the view from above, whereas fig. 4 is the side view in operation phase. Fig. 5 is the view of an upright length to show the levels and the controls.

The version foresees the uprights 1 and 2 with coaxial extensibili¬ ty in both senses with feet 3, 4 and 5, 6 to control by hand through the crank pair 7 acting on device fitted with worms. The stabiliza- tion in vertical sense can be regulated by means of the level pair 8. Each upright supports a truck 9 engaged in longitudinal guide 10 sustaining a motor assaribly 11 which, by means of a gear on rack 12, allows its up and down movements. Truck 9 brings the connected arm 13 supporting a second motor assembly 14 for the extensibility on coaxial guides of part 15 of the said arm by means of a worm devi¬ ce. The extendible part 15 brings the horizontal shaft 18 on top of i poser 16 with blocking screw 17. On this part 15, jack 19 is brought which supports the compacting shaft 22 with pressure blocking means 21. For working, the levelling assembly is ^' adjusted by means of the two jacks 19 supporting the compacting shaft, and the assembly is brought into position by means of the motor assemblies 14 which regu¬ late the straddle. A trial movement is then carried out to check whe¬ ther the machine is suited for the operation, and the ^' automatic control 23 is engaged to stop the πtovement at the upper travel limit by means

of control 24. With the hydraulic pump lance, the compound, such as "scagliola" coating or other, is brought on the wall length to treat, and the control 23 is switched on from above, with control• 25 in automatic sequence, bringing the ^" levelling assembly down to the lower limit.

The operation can be carried out with advancing levelling group in continuous motion and constant upward speed.

The position of the machine can be easily displaced and trasport- ed since it consists of four independent parts that can be reduc¬ ed.

The cαxrponents of the wo operation assemblies and the levelling one, as well as the movement and regulation organs, can be fore- seen in different ways.