The subject of the invention is a surface spatula designed as a tool in the building branch for executing the smooth surfaces.

Known spatulas usually consist of hand-held grip - handle, with different shapes suitable for holding in operator's hand performing spackling and consist of the tool holder in which working portion of the tool is fixed, usually in the form of thin plate most frequently made of metal, called smoothing tool, knife or edge.

In the-state-of-the-art different shaped hand-held grips and different structures for smoothing edge fixing are known.

The surface spatulas are hand-held tools which in particular may have large length of the smoothing edge blade what allows the greater smooth surfaces during executing one tool pass by the operator to be obtained.

In the-state-of-the-art of the invention different technical solutions of the surface spatulas which are characterized by shape of the hand-held grip and structure of smoothing edge fixing are known.

From community design number RCD 002614677-0002 shape of manual tool housing called „Werkzeuggriffe" designed for surface spackling is known. The tool consists of the hand-held grip which in its upper portion have form similar to the ellipse and consists of the connector placed underneath in the form of necking narrowing and consists of the lower tool holder located at one side of the connector. The tool holder is connected from one side of the connector and has the tool slot between lower support and upper short arm. In the tool slot the tool working portion in the form of thin plate extended outside the tool slot is mounted. The spatula for surface smoothing which has the open handheld grip which has in the front view its profile based on the plane similar to the regular square with lateral indent at one of the sides from the upper surface of the smoothing tool plate is known from US 2015225967A1 application. From EP 2137364 spackling spatula hand-held grip which in front view has profile in form of relatively thin, elongate handle extended in the opposite direction from the smoothing edge location and which profile has necking narrowing below hand-held grip underneath of which the holder for smoothing edge is located is known. Plug community design according RCD 04735553-0001 closing profile faces of the hand-held grip and the connector of the spackling spatula in housing profile is known.

From EP3263801 patent description structure of smoothing edge blade mounting in the spackling spatula in which shape of hand-held grip corresponds industrial design RCD 002614677 is known. The tool holder according to this design comprises the tool slot in square form for smoothing blade located in the lower portion of the spackling spatula ended with support with the hook.

From P.427393 patent application the fixing design of the smoothing edge blade by articulated lock is known. The hand-held grip in this solution in front view has U- bended profile.

Known surface spatulas, as tools for surface manual spackling, most frequently are made of metal profiles, in particular, aluminum profiles.

To develop the present invention, the technical analyses in the range of the hand-held grip, construction of working portion mounting in the tool and analyses of the surface spatulas using manner by operator at executing smooth surfaces in building and renovation branch were performed.

The technical problem to find solution in manual tool design for spackling according to present invention was developing surface spatula not comprising drawbacks present in previously known tool designs, in particular tools for spackling with metal hand-held grips which by nature are smooth and cause uncertainty while keeping in hand by the operator caused by grip slippery surface.

Analyzing this, it was taken into account that spackling operation is occurring in conditions of the moisture mass application and it is unavoidable its spreading on spackling tool in particular also on handheld grip, and then when it is made in particular from aluminum what reduces the adhesion of the tool grip by operator's hand.

In addition, it was noticed that manual tool for spackling made from metal profile is a very good heat conductor and is "cold" when touched even during operator's work in gloves. Furthermore, it was taken into account that during long-lasting work in particular when the tool length may reach 2500 mm, excessive weight may be subject matter for the operator.

Thus, in developing spackling tool according to invention, it was considered that it is necessary to solve these problems, in particular in view of obtaining for the operator the manual tool of higher surface quality and to increase work productivity with less physical effort, in particular at long-lasting work, and in particular when executing the spackling of large surfaces with the tool of large length having in view obtaining good tool grip.

The essential problem when developing invention was also the need to obtain the possibility of easy replacement of the used working element - smoothing edge blade.

The invention provides technical solutions corresponding to above mentioned problems connected with obtaining technical effect when using the tool for manual spackling.

According to invention, the manual tool for spackling designed in particular for larger surfaces consists of known elements, in form of housing comprising the hand-held grip and the tool holder in which the working portion in form of the smoothing edge blade is mounted detachably. In the solution ranged in invention between the hand-held grip and the tool holder in the surface spatula mounting the profile connector is present.

According to invention, the surface spatula housing is provided on the gripping portion surfaces with the soft, convex covering made of thermoplastic. The soft covering is integrally bonded to the substrate on the portion of the external surface of the housing spatial structure formed as the longitudinal profile. Preferably, the housing is made of the hard construction plastic, preferably from the plastomer group. The spatial structure constitutes closed block, ribbed internally, with uniform profile along its length. The soft covering, including also made in form of the superficial elements on external surfaces of the hand-held grip and connector is present. The spatial structure elements of the profile present in the housing in the portions including the hand-held grip and the connector have the known spatial form. In front view of the housing profile outline the hand-held grip is located in the upper housing portion and has outline form similar to the ellipse. The outline in the lower portion is connected to the connector form outline, narrow in relation with the tool holder form and located in the lower portion of the housing with smooth, concave arcs. The connector in the middle of its height has the necking narrowing and is located asymmetrically in relation to the handheld grip. From the one side of the connector in its lower portion, the spatial structure of the housing in form of extended arm is attached and from the same side of the connector the support located below the arm is attached. In the surface spatula between the arm and support the tool seating with two-part, open space of the tool slot is located. The tool slot space consists of the wedge slot and the cuboidal slot. In the tool slot, preferably detachably, the retaining portion of the known working element for direct spackling - called smoothing edge - is mounted and fixed. The retaining portion of the smoothing edge is fixed longitudinally in the housing by the plug plates which are mounted and close preferably detachably the faces of the housing profile. The plug plate has shape corresponding to the face outline of the spatial structure of the housing profile. The plug plate from the external side has planar surface, and from internal side is provided with the stiffening projections, retaining projections and clamping projections.

In the surface spatula according to invention, the tool slot is open through space along the length of the housing profile and in front view of the profile outline is closed from the side of joining with the connector. The width of the tool slot width consists of its first wedge portion located closer to the connector. The wedge portion is hollowed portion of the tool slot space shaped in form corresponding to the shape of the single-sided wedge. The second cuboidal portion of the tool slot located further from the connector beyond wedge portion is the portion of the tool slot space shaped in the form of a very thin cuboid with the height significantly smaller than the its width. The tool slot in the wedge portion has variable height, the smallest from the side of joining with connector and the greatest at the end of the width thereof, in further portion existing furthermost from connector in the housing profile. The tool slot upper surfaces in the wedge portion and in cuboidal portion constitute together the lower external surface of the wall of the arm spatial structure in the housing. The upper, flat, external surfaces of the support in tool seating constitutes lower surface of the tool slot. The support is located as the lowest lower portion of the profile and connected with the lateral side of the connector in its lower portion. The uniform support shape in the tool holder in the housing profile are consisted together of their portions: the portion joined directly to the connector with the shape similar to the cuboid and further one, spaced from the connector of the support with the shape similar to the single-sided wedge. The width of the support upper surface consists of the surface width together in its portion with cuboidal shape and surface in the portion of the wedge shape. The support height in its cuboidal portion is preferably at least twice greater than the wall thicknesses in portions including the hand-held grip spatial structures and the housing profile connector. The arm in the housing is internally ribbed spatial structure having several internal shaped chambers preferably four chambers separated by the ribs.

The arm in the housing has external shape in the form of single-sided wedge having variable height - the greatest at the joining with the connector in the portion located over the tool slot in its wedge portion, and the arm has the smallest height in the arm ending located furthermost from the connector. The arm ending is rounded from the top. The total arm length is greater in relation to the tool slot width ranged from 3 to 6 times including preferably four times. The arm housing on the lower flat surface portion in the cuboidal portion of the tool slot has further flat lower surface portion extended up to its ending.

The profile on the gripping portions of the surface spatula housing has the soft external surface outline covering of the hand-held grip integrally bonded with the substrate and connector outline, preferably occurring in form of superficial elements covering portion of the hand-held grip external surfaces and the connector portion external surfaces and occurring along the entire length of the housing profile. The superficial elements preferably are shaped in form of the stripes with the width from 1 to 15 mm each, preferably with the width of 5 mm.

In the surface spatula housing according to invention, the superficial elements occurring on the hand-held grip and connector outline along the length of the housing profile preferably occur in form of the stripes distributed with uneven circumferential pitch on the hand-held grip outline, preferably in form of the parallel stripes. It is preferable if stripes are located on the connector outline and on the hand-held grip outline and are at least preferably located in this manner such that at least one stripe is located on the side of the hand-held grip located above the tool seating, at least one stripe occurs on the other opposite side of the hand held grip outline and at least three stripes occur on the upper portion of the hand-held grip outline and at least one stripe occurs on the lower side of the hand-held grip outline and at least one stripe is located on both sides of the connector outline preferably in its necking narrowing.

In the spatial structures of the hand-held grip and connector of the housing profile in the surface spatula according to invention, the external walls are provided with the superficial recesses suitable for superficial element shapes and which are located at locations designed suitably for the superficial elements including preferably occurring in form of the stripes. The recesses are made on the portion of the external surface of the hand-held grip and the connector. The external walls of the hand-held grip spatial structures and the housing connector are preferably locally thickened towards inside of the housing spatial structure at locations of recess occurring.

In the surface spatula according to invention, in front view of the housing profile in spatial structure of the hand-held grip there occur several preferably six internal hollowed chambers including there occur lateral chambers on both sides of the hand-held grip outline and lower chambers in the hand-held grip outline which are shaped by the external walls of the hand-held grip outline of the profile and are separated by internal ribbing of the hand-held grip preferably in form of the crossed ribs. In position wherein the arm lower surface is in horizontal position, the hand-held grip ribbing consists of at least two ribs inclined in relation to the vertical and at least one rib inclined to the horizontal.

In the arm spatial structure there occur several preferably four hollowed chambers shaped by its external outline and internally separated by at least four preferably four ribs inclined to the vertical.

In the housing profile spatial structure in the tool seating of the surface spatula according to invention, the retaining part of the known working element is mounted and fixed preferably detachably for direct spackling - called smoothing edge, occurring in form of the thin blade with rounded working end, preferably in form of the metal blade. The retaining portion of the smoothing edge blade is fixed preferably detachably in the tool holder in the tool slot. The smoothing edge blade is made in such position in which one of the longer edges of the smoothing edge blades is brought into contact by being moved to be resisted by the wedge portion closing the tool slo, at location of its lowest height which corresponds to the thickness of smoothing edge blade. The tool slot height in its cuboidal portion corresponds to the smoothing edge blade thickness mounted in the tool slot. The upper surface of the smoothing edge blade retaining portion is fixed as adjacent to the arm lower surface on the width corresponding together to the tool slot width in the cuboidal portion and width of further flat lower portion of the surface on the arm length up to its ending. The lower portion of the surface retaining portion of the smoothing edge blade in tool seating is adjacent to the upper planar surface of the support. Furthermore, in the retaining portion, several, at least two known local rounded oval splines, preferably obtained by thorough intersecting of the smoothing edge blade thickness and its vertical bend off is made on its upper surface. The intersections in the retaining portion of the smoothing edge blade are made at a distance from the longer edge of the retaining portion of the smoothing edge blade, at locations which after mounting the smoothing edge blade retaining portion in the tool seating correspond to the greatest wedge portion height in the tool slot and to which height corresponds to the greatest height of rounded oval splines. The tool holder width is measured from the tool slot begin in its wedge portion, along the lower surface up to arm ending in relation to the total smoothing edge blade width ranged in 4:10 ratio, while preferably in 5:9 ratio.

In surface spatula according to invention, the smoothing edge blade retaining portion is fixed longitudinally between the double-sided plate plugs closing the facing surfaces of the housing profile. The plug plates are made of the hard construction plastic from plastomer group and plates are externally single-sided planar. The plug plates are fixed in one of the middle internal chambers in housing arm of the spatial structure. In front view of the housing profile, the middle chamber in the arm has shape similar to the trapezoid with non-parallel bases, with lower shorter base parallel to the arm external surface. In front view of the housing profile plug plate fixing inside the middle chamber occurs, by stiffening projections made on the inside surfaces of the plug plates. The stiffening projections are located on the inside plate walls according to the position of the middle chamber in the spatial structure of the housing arm and projections have external shape corresponding to the middle chamber shape. Furthermore, on the internal surfaces of the plug plates the known fixing projections also are made located correspondingly to the position of the internal chambers in the spatial structure of the hand-held grip in the housing profile. Furthermore, the plug plates have the known clamping projections located on the internal surfaces: the upper and lower fixing each plug to the housing profile. Each clamping projection have located vertically cylindrical pins, bend off resiliently and clamped during assembling the plug to the housing profile, in cylindrical holes-through made and suitably located in the housing walls near housing profile faces. The upper clamping projections are fixed suitably in the upper holes made in the wall upper portion of the housing hand-held grip spatial structure and the lower clamping projections are fixed in the lower holes made suitably in the lower portion of the housing profile wall.

In the surface spatula according to invention housing profile and plug plates are made of construction plastic with the hardness 65 to 75, preferably 70 in Shore's A scale. The covering and the superficial elements are made of soft plastic with hardness 60 to 70, preferably 65 in Shore's A scale.

According to invention, in the surface spatula, the shape of the spatial structure facial outline of the housing profile with its spatial location in which the lower planar portion of the arm surface lies on the horizontal plane is characterized in that the fact that one plane perpendicular thereto is tangential from one side to the convex portion of the hand-held grip outline and is a secant plane intersecting through the tool slot, intersecting there its wedge portion in the tool holder. The second plane which is also perpendicular to the horizontal plane on which lies the planar portion of the arm surface and which is tangential from the other side to the convex portion of the hand-held grip outline shape is spaced dimensionally from the first plane tangential to the hand-held grip outline, ranged from 40 mm to 110 mm, wherein preferably at the distance of 65 mm.

Furthermore, the other plane perpendicular to the horizontal plane is the secant intersecting through the middle portion of the connector shape which width in the necking narrowing is ranged within 10 mm to 30 mm, wherein preferably is 15 mm. The plane tangential to the upper portion of hand-held grip outline shape and parallel to the horizontal plane is spaced dimensionally within range from 40 mm to 70 mm, wherein preferably at the distance 45 mm. Furthermore, the secant plane on which the longest chord of the hand-held grip outline shape lies is inclined plane in relation to the vertical plane, wherein linear acute of double- walled angle between these planes is ranged within 7° to 15°, preferably is 10° and vertex of the linear acute angle lies on the vertical plane and is located beyond arm limit.

The surface spatula technical solution according to invention brings beneficial qualitative technical results when using by the operator executing smooth surfaces of the building partitions, including walls and ceilings.

Using of soft coverings for the hand-held grip of tool allows operator to have secure and good grasp of the tool thus increasing possibility to obtain higher surface quality and improving operator's working culture.

Embodiment of tool housing according to the invention with plastic with the soft covering of its hand-held grip, significantly reduces the surface spatula weight.

Housing technical solution by means of the rigid construction of the spatial structure of the plastic profile will cause increasing operator's productivity, particularly noticeable at long-lasting manual work with this tool and at great lengths of the housing profile.

Combination of the hand-held grip surface covering in housing made of the soft plastic ensures secure and permanent joining with housing profile construction plastic. Such a permanent material joining is in principle difficult to achieve when making metal hand-held grip known from the-state-of the art.

The smoothing knife blade mounting of working element in the housing according to invention in the elongated tool seating resulting from spatial structure in arm construction and rigid support and by construction stiffening by suitable projections in the plugs which enter the chamber in the arm, increases possibility to obtain the surface quality and operator's productivity by means of the stiff smoothing edge blade fixing and provides easy working element replaceability after wearing its working edge.

Subject of invention is presented in attached drawings:

Fig. 1 - shows general view of surface spatula housing in parallel projection based on the profile (1) with hand-held grip (2) covered with soft plastic (3) and with smoothing edge (16) mounted in the tool seating (4) in the arm (8) and closed with plugs (26);

Fig. 2 - shows front view of the housing profile (1) spatial structure of the surface spatula with smoothing edge (16) mounted in the tool seating (4);

Fig. 3 - shows surface spatula housing in parallel projection with extended smoothing edge blade (16) and with its fixing elements (18) and (19) and removed plug (26) and in hand-held grip version (2) and connector (5) covered with stripes (28) made of soft plastic in arrangement along profile (1);

Fig. 4 - shows diverted surface spatula housing in parallel projection, showed in fig. 3;

Fig. 5 - shows surface spatula housing in front view with indicated imaginery planes determining features of the housing profile (1);

Fig. 6 - shows embodiment of the surface spatula housing in parallel projection in which the hand-held grip (2) is covered with superficial elements (27), arrangement with stripes located transversely in relation to housing profile length (1);

Fig. 7 - shows embodiment of the surface spatula housing in parallel projection wherein hand-hold grip (2) is covered with superficial elements (27) in arrangement with many thin stripes located with small spacings and transversely in relation to the housing profile (1);

Fig. 8 - shows facial view of the housing profile (1) spatial structure of surface spatula with detail A of the smoothing edge (16) mounting in tool seating (6) and with detail B depicting rounded ending (20) of the smoothing edge (16).

In the first embodiment of the surface spatula according to invention, the tool consists of the housing in which is fixed to the working portion of the tool in form of smoothing edge blade (16).

The longitudinal profile 1 made of construction hard plastic, polyvinyl chloride PCV-U is the basic element of the surface spatula housing. The housing profile 1 is closed at the endings with shaped plugs 26. The smoothing edge blade 16 is mounted in the tool holder in profile 1.

The profile 1 spatial structure constitutes closed block internally ribbed with uniform profile along its entire length.

In the first embodiment of the surface spatula according to invention in facial view of the housing profile outline 1, the hand-held grip 2 is located in the upper housing portion and has outline shape 15 similar to ellipse. The outline 15 of the hand-held grip 2 in its lower part is connected to the outline connector 5 shape with smooth, concave arcs. The connector 5 is located in the housing lower portion and which is narrow as compared to the tool holder shape 2. The connector 5 has necking narrowing in the middle of its height and asymmetrical in relation to the hand-held grip 2. From one side of the connector 5, to its lower portion the lateral spatial structure of the housing is attached in form of the extended arm 8, and from the same side of the connector 5 the support existing below arm 8 is attached. In the profile 1 between arm 8 and support 7 the tool seating 6 is located with the two-part open slot space of the tool slot 9 consisting of the wedge slot 10 and the cuboidal slot 11. In the tool slot 9 there occur smoothing edge retaining portion 16 is fixed and mounted detachably and fixed longitudinally in the housing by the plug plates 26 which are mounted detachably and close the faces of the housing profile 1. The plug plate 26 has shape corresponding to the spatial structure outline face 1 of the housing. The plug plate 26 from external side has planar surface, and from internal side is provided with the stiffening projection 30, the retaining projection 31 and the clamping projections 32 and 33. The tool slot 9 is the portion of open hollowed space through along the housing profile 1 length. In front view of the housing profile outline 1 the tool slot is closed from one side from the side of joining with connector 5. Width of its first wedge portion 10 consists of the tool slot width 9 and width of the of its second cuboidal portion 11. The wedge portion 10 is a portion of hollowed open space formed correspondingly to the shape of the single-sided wedge located closer to the connector 5. The second cuboidal portion 11 is located farther from connector 5 behind the wedge portion and is a portion of hollowed, open space, formed as a very thin cuboid with the height significantly smaller than its width. The tool slot 9 in its wedge portion 10 has variable height, the smallest from the side of joining with connector 5 and greatest on the end of its width, in further portion existing furthermost from connector 5.

The upper planar external surface 13 of the support 7 in tool seating 6 constitutes upper surface of the tool slot 9. The support 7 is located as the lowest lower portion of the housing profile 1 and is connected to the lateral connector side 5 in its lower portion. The uniform shape of the support 7 in tool holder 4 consists together of the parts: part 43 directly connected to the connector having shape similar to thecuboid and further, spaced from connector 5 part 44 having shape similar to the single-sided wedge. The width of the upper support 7 surface 13 consists together of the width of surface in its portion having cuboidal shape 43 and surface in portion having wedge shape 44. The support height in the cuboidal portion 43 is twice greater than wall thicknesses in portion including the hand-held grip 2 spatial structures and connector 5. The arm 8 in the housing is internally ribbed structure having four internal shape chambers separated with ribs. The arm 8 has external shape in form of the single-sided wedge having variable height - the greatest at joining with the connector 5 in the portion located over the tool slot 9, in its wedge portion 10 and the smallest height arm 8 has in the end 14 of the arm 8 located furthest from connector 5. The end 14 of the arm 8 is rounded from the top. The arm 8 total length is four times greater in relation to the tool slot width 9. The arm 8 on the extension of the lower planar cuboidal portion 11 of the tool slot 9 has further planar portion of lower surface 12 extended up to its ending 14. Profile 1 on the gripping portions of the housing has the soft covering 3 integrally bonded with the substrate. The covering 3 includes whole outline 15 external surface of the hand-held grip 2 and connector outline 5. The covering 3 is made of the soft vinyl polychloride - PCV-P. In the spatial structure of the housing profile 1, in the hand-held grip there are six internal hollowed chambers, including: lateral chambers 45 and 47 on both sides of the outline 15 and the lower chambers 46. The lateral chambers 45 and 47 and the lower chambers are formed by external wall of the hand-held 2 outline 15 of the profile 1 and separated by the internal ribbing of the hand-held grip 2, in the form of the crossed ribs. I front view of the housing profile 1, when lower surface 12 of the arm 8 is in vertical position, consists of the two ribs 21 inclined to the vertical and one rib 22 in horizontal position inclined to the horizontal. In the arm 8 spatial structure there are four hollowed chambers formed by its external outline and separated internally by four ribs 23 inclined to the vertical. The connector 5 has the ribbing in form of the one vertical rib 24. In the tool seating 6 of the profile 1 in the surface spatula smoothing edge retaining part 16 is fixed and mounted. The smoothing edge 16 is a thin steel blade with rounded working edge 20. The smoothing edge 16 blade retaining plate is fixed and mounted detachably in the tool holder 4 in the tool slot 9. The smoothing edge blade 16 fixing is done in such position wherein one of its longer edges is brought into contact by being pushed closely to the wedge portion 10. It is place with the smallest height which corresponds to the smoothing edge blade 16 thickness. The tool slot height 9 in its cuboidal portion 11 corresponds to the smoothing edge blade 16 thickness. The upper surface 17 of the smoothing edge blade 16 is fixed as adjacent to the lower surface 12 of the arm 8, on the width corresponding together to the tool slot width 9 in cuboidal portion 11 and further, the planar lower surface, up to the end of the arm 8.

The surface lower portion of the retaining portion of the smoothing edge blade 16 in the tool seating 6 is adjacent to the upper planar surface 13 of the support 7. In retaining portion, in smoothing edge blade on its upper surface 17 there are three local oval splines 18. The oval splines 18 are made by intersecting trough the smoothing edge blade 16 and vertical bending off therein. The intersections 19 in retaining portion in smoothing edge blade 16 are made at locations and in such distance from longer edge of retaining portion of the smoothing edge blade such that after fixing the retaining portion of the smoothing edge 16 in the tool seating 6, these locations correspond to the greatest height of the wedge portion 10 in the tool slot 9. The oval spline height 18 corresponds to the greatest height in the tool slot in the wedge portion 10. The tool slot width 4 is measured from the begin of the tool slot width in its wedge portion 10, along lower surface 12 up to the arm end 8, to the end 14, in relation to the total width of the smoothing edge blade 16, is 5:9. The retaining portion of the smoothing edge blade 16 is fixed longitudinally between the double-sided plug plates 26 closing housing profile 1 faces. The plug plates are made of the hard vinyl polychloride PCV-U. The plates 26 are planar on one side. The plug plates 26 are fixed in the middle internal chamber 29 in the arm 8 housing spatial structure. In front view of the housing profile 1, arm 8 middle chamber has shape similar to the trapezoid with non-parallel bases with the lower shorter base parallel to the arm 8 external surface. The plug 26 fixing take place within middle chamber 29 by the stiffening projections 30 made on the internal surfaces of the plug plates 26. The stiffening projections 30 are located on the plug plates 26 internal walls, suitably to the middle chamber 29 position in the housing arm 8 spatial structure. The stiffening projections 30 in plates 26 have external shape corresponding to the chamber shape 29. The fixing projections 31 are made also on the plug plates 26 internal surfaces corresponding to the shape and location of the internal chambers position within hand-held grip 2 spatial structure in the housing profile 1. The plug plates 26 have clamping projections located on internal surfaces: upper 32 and lower 33, fixing each plug 26 to the housing profile 1. Each clamping projection 32 and 33 has circular pins located vertically, bend off resiliently and clamped during plug plates 26 assembling to the housing profile 1, in cylindrical trough-holes 34 and 35, made and fixed suitably in the housing walls near near housing profile 1 faces. The upper clamping projections 32 are fixed in the upper holes 34 made in the upper portion of the spatial structure upper wall of the hand-held grip and the lower clamping projections 33 in the lower portion of the connector 5 wall of the housing profile 1 are fixed.

The surface spatula profile 1 and the plug plates 26 are made of hard vinyl polychloride PCV-U with hardness 70 in Shore's D scale. The covering 3 of hand-held grip and connector 5 is made of the soft vinyl polychloride PCV-P with hardness 65 in Shore's A scale. The face shape of the housing profile 1 spatial structure at its spatial location in which lower planar surface portion 12 of arm surface 8 lies on the vertical plane 36, means such that one plane 37 perpendicular thereon is tangential from one side to the convex outline portion 15 of the hand-held grip 2 and is the secant plane 37 intersecting through the tool slot 9 in its wedge portion. The second plane 38 also perpendicular to the vertical plane 36 and tangential from second side to the convex portion of outline shape 15 of the handheld grip 2, is spaced dimensionally from the first plane 37 tangential to the outline 15 of the hand-held grip 2 at distance 65 mm. The other plane perpendicular to the vertical plane 36 is the secant 39 intersecting through the middle portion of the connector shape 5. The connector 5 width in necking narrowing is 15 mm. The plane 40 tangential to the upper portion of the outline shape 15 of the hand-held grip 2 and parallel to horizontal plane 36 is located at distance 45 mm. The secant plane 41 on which longest chord of the outline shape 15 of the hand-held grip 2 lies is the plane 41 inclined in relation to the horizontal plane 36. The linear acute angle 42 of the doubled-walled angle between these planes 36 and 41 is equal 10° and vertex of linear acute angle 42 lies on the horizontal plane 36 and is located beyond end 14 of the arm 8.

In second embodiment of the surface spatula according to invention, the profile 1 and the plates 26 in the surface spatula housing are made of polyamide. The housing spatial construction is the same as in first embodiment thereof. In this embodiment of the housing there is also the same construction of fixing and detachable mounting of the retaining portion of the smoothing edge 16 in the tool seating 4 with using the shaped plates 26 closing detachably housing profile 1. In the second embodiment of the surface spatula according to invention, the housing is provided with soft, convex superficial elements 27 integrally connected with the substrate and which are made of the soft vinyl polychloride PCV- P. The superficial elements 27 cover external surface portion of the outline 15 of the hand-held grip 2 and the connector 5 and along the length of the housing profile 1 are located. The superficial elements 27 are formed as stripes 28, with width 5 mm each. The stripes 28 are distributed with un-uniform circumferential pitch on the outline 15 of the hand-held grip 2 and are parallel. The stripes 28 are located on the connector outline 5 and on the outline 15 of the hand-held grip 2 and are located such that one stripe 28 is located on the outline side 15 of the hand-held grip 2 located over the tool seating 6, one stripe 28 is located on the other opposite side of the outline 15 of the hand-held grip 2 and three stripes 28 are located on the upper portion of the outline 15 of the hand-held grip 2 and one stripe 28 is located on the lower portion of the outline 15 of the hand-held grip 2 and the stripe 27 each locating on the both sides of the connector outline in its necking narrowing. The external walls of the hand-held grip 2 and profile 1 connector 5 are provided with the surface recesses 25, suitable for stripe shapes 28 and which are located in dedicated locations suitably for the stripes 28. The external walls of the hand-held grip 2 and the housing connector 5 are thickened locally suitably to recess position towards inside of the housing spatial structure.

In third embodiment of surface spatula according to invention the profile 1 and plates 26 in the housing are made of the hard vinyl polychloride PCV-U. The housing spatial construction is the same as in first embodiment thereof. In this embodiment of housing there are also the same construction of fixing and mounting of the retaining portion of smoothing edge 16 in tool seating 4, with using shaped plates 26 closing housing profile 1. In third embodiment, the surface spatula housing is provided with soft, convex superficial elements 27 bonded integrally with the substrate and which are made of soft vinyl polychloride PCV-P. The superficial elements 27 cover external surface portion of the outline 15 of the hand-held grip 2 and connector 5 and are present along housing profile l. The superficial elements 27 are made of continuous and parallel stripes located transversely in relation to the profile 1 length with width 5 mm and with pitch 5 mm. The stripes are connected at the outline 15 endings of the hand-held grip 2 and connector 5. There are recesses on the wall surface of the hand-held grip 2 and connector 5 located suitably according to the stripe shape and distribution and wall thickness in these locations is enlarged suitably according to the recesses on the hand-held grip surface 2 and connector 5.

In fourth embodiment of the surface spatula according to the invention, profile 1 and plates 26 in the housing are made of hard vinyl polychloride PCV-U. The housing spatial construction is the same as in first embodiment thereof. In this embodiment of the housing there are also the same construction and fixing of the retaining portion of the smoothing edge 16 in tool seating 4, with using shaped plates 26 closing housing profile 1. The housing is provided with soft convex superficial elements 27 bonded integrally with the substrate and which are made of the soft vinyl polychloride PCV-P. The superficial elements 27 cover external surface portion of the outline 15 of the hand-held grip 2 and connector 5 and are present along the housing profile 1. The superficial elements 27 are made of continuous and parallel stripes located transversely in relation to the profile length with width 1 mm and pitch 1 mm. The stripes are connected at the outline 15 endings of the hand-held grip 2 and connector 5. Wall thickness in places where stripes are present is enlarged suitably to the recess positions on the surface of the hand-held grip 2 and connector 5.

The surface spatula housing according to the invention is characterized in that the high usability and by ensuring the operator good tool grip with relatively small weight allows operator's work quality and productivity to be increased and consequently executing smooth spackling surfaces of the building partition surfaces suitably to requirements in this range.