US3887114A - Mortar layer - Google Patents

Mortar layer Download PDF

Info

Publication number
US3887114A
US3887114A US384959A US38495973A US3887114A US 3887114 A US3887114 A US 3887114A US 384959 A US384959 A US 384959A US 38495973 A US38495973 A US 38495973A US 3887114 A US3887114 A US 3887114A
Authority
US
United States
Prior art keywords
mortar
layer
agitator
viscous
leg regions
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US384959A
Inventor
Augusto Villanovich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3887114A publication Critical patent/US3887114A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14Conveying or assembling building elements
    • E04G21/16Tools or apparatus
    • E04G21/20Tools or apparatus for applying mortar
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14Conveying or assembling building elements
    • E04G21/16Tools or apparatus
    • E04G21/20Tools or apparatus for applying mortar
    • E04G21/204Mortar sledges

Definitions

  • a mortar layer for laying a viscous mortar of a uni- [56] References Cmd form width and thickness on a surface is disclosed.
  • UNITED STATES PATENTS The variability of the thickness and width of the mor- 358,303 2/1887 Sheldon 222/233 ar i also permitted by adjustment of various compo- 771,l04 9/1904 Sparks 222/233 X nents of the mortar layer. Uniformity in deposition of 1,833,582 11/1931 Kavanagh 2,325,970 8/1943 Myers........... 2,683,981 7/1954 Richey..
  • This invention relates to a device for laying mortar.
  • the invention therefore contemplates a mortar layer for laying viscous mortar of a uniform width and thickness onto a surface
  • a body disposing an internal chamber having an upper viscous mortar storage region and a contiguous depending leg region extending into a terminal opening.
  • an agitator disposed within the chamber and extending into the contiguous depending leg region for shaking the viscous mortar therein.
  • FIG. I is a perspective of the embodiment of the invention.
  • FIG. 2 is a section along lines Il-ll of FIG. 1.
  • FIG. 3 is a perspective of the embodiment of FIG. 1 in use on a row of bricks.
  • a mortar layer 10 includes a body 11 mounted on four adjustable wheels 12.
  • the body 11 has a post-step slot arrangement I4 at each corner to carry the axis of each wheel 12 and to adjustably place the wheel at predetermined positions relative to the base so as to carry the body at different selectable heights from a running surface.
  • the body I] displays an internal chamber of two marginal depending legs 17 having lower terminal openings 18. The upper portion of the legs respectively communicate across the crotch into an upper unitary contiguous storage region I9.
  • a vertically movable agitating member 21 in the shape of an inverted V and in the vicinity of the storage region 19. extends over the crotch and down along the internal portions of the legs 17 as more particularly seen in FIG. 2.
  • each of the depending legs extends a second movable member 22.
  • Each of these movable members 21 and 22 are attached to a horizontal bar 23 which is linked by a projecting loop straps 24 to respective throw-arms 26 of a rotatable crankshaft 27 which straddles over the top of the body I I and extends outward from the body to dispose tips of the crankshaft 27 away from the body.
  • Onto these projecting tips of the crankshaft 27 can be affixed at crankshaft 28 on either side of the body 11.
  • the crankshaft 27 is rotatably secured to the upper part of the body through appropriate bushing members 31.
  • each leg region 17 is slot 30 and adjustable closing gate 31.
  • the slot 30 communicates into the leg regions and permits. as the layer is moved over a running surface. such as the row of bricks 36 of FIG. 3, mortar 39 to be deposited in the running surface 37, in two streams 40 along the margins of the row.
  • adjustable curbs 33 and 34 are provided along the lateral sides of the leg regions I7 near the lower terminal opening 18. The curbs 33 are adjustably secured to the margin by the thumb screws 35. The dis tance between lower edge of the curbs 33 and 34 relative to the running surface 37 will determine how wide a stream of mortar can be layed.
  • the layer 10 is set on a row of blocks 36 such that the wheels 12 straddle the margins of the blocks 36.
  • the layer is propelled by hand against one of the carrying handles 29 and the viscous mortar 39 within the storage region 19 is conveyed through the legs and terminal openings onto the block as two continuous uniform streams of viscous mortar 40.
  • the other hand of a person is used to rotate the crank 28 and to cause the members 21 and 22 to vertically reciprocate vibrating the mortar 39 temporarily enhancing its viscosity and ability to move through the legs 17 to the terminal openings 18 at the base of the body 11.
  • the thickness of the mortar 40 deposited on the bricks is dependent in part upon the slump of the mortar as well as the vertical displacement of the body 11 above the surface of the bricks and the speed of rotation of the crank 27. After some experience a user will know the parameters required in order to provide uniform deposition of visi cous mortar onto a laying surface. Additional control of the uniformity in thickness and width of the deposition of the uniform viscous mortar 39 can be obtained by varying the wheels 12 in their respective slot arrangement 14 or by changing the position of gates 31 to open or close the slots 30 or both; alternatively, the curbs 33 and 34 can be raised or lowered.
  • a mortar layer for laying viscous mortar of a uniform width and thickness onto a surface comprising a body having an internal chamber with an upper viscous mortar storage region and two contiguous depending leg regions relatively spaced a predetermined distance. said leg regions extending into terminal openings disposed lateral to the direction of movement of the layer.
  • a single flat surfaced agitator having an inverted V- shaped cross-section including arms and an apex, the apex disposed within the storage region of the chamber and one arms fo the agitator extending into each of said leg regions, for shaking the viscous mortar therein.
  • means for moving the layer includes means for disposing the terminal opening at selected predetermined distance from the surface.
  • the layer of claim I further comprising means for controlling the amount of mortar disposed on the surface.
  • the layer of claim 1 further comprising a slot disposed in the rear margin of each leg region through which mortar is disposed on movement of the layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Abstract

A mortar layer for laying a viscous mortar of a uniform width and thickness on a surface is disclosed. The variability of the thickness and width of the mortar is also permitted by adjustment of various components of the mortar layer. Uniformity in deposition of the mortar is insured by an agitator mechanism shaking the mortar onto the surface.

Description

United States Patent 1191 1111 3,887,114
Villanovich 1 June 3, 1975 MORTAR LAYER 3,162,886 12/1964 Wise..... 401/193 x B 401 x 1 2121122 2/122: .221 21217.
St., Chatham, Ontario, Canada [22] Filed: Aug. 2, 1973 FOREIGN PATENTS OR APPLICATIONS 1,096,113 12/1954 France 401/193 [21] Appl. No.: 384,959 907,591 3/1954 Germany 1,040,220 10/1958 Germany 401/4 30 F0 e1 n A lic tion Prio it D ta 1 r 8 pp 8 r y a Primary Examiner-Robert B. Reeves June 7, 1973 Canada 173524 Assistant Examiner charles A. Marmor 52 US. Cl. 222/176; 222/232; 401/4 ;f Hendemn' [51] Int. Cl. A01c 15/00 [58] Field of Search 222/196, 176, 200, 178,
A mortar layer for laying a viscous mortar of a uni- [56] References Cmd form width and thickness on a surface is disclosed. UNITED STATES PATENTS The variability of the thickness and width of the mor- 358,303 2/1887 Sheldon 222/233 ar i also permitted by adjustment of various compo- 771,l04 9/1904 Sparks 222/233 X nents of the mortar layer. Uniformity in deposition of 1,833,582 11/1931 Kavanagh 2,325,970 8/1943 Myers........... 2,683,981 7/1954 Richey..
-------- 4 2/ 6 X the mortar is insured by an agitator mechanism shak- 222/176 x ing the mortar onto the surface. 401/193 X 3,148,432 9/1964 Garnett,Jr 222/178X 4Claims,3Drawing Figures :F-EE: FF 1 4 F1 1B. 2,- 1' 2 .1 1::- 24 24 O 1 Q 1 I H 1 t 1 322 1 21 22. 11
1 35 2 E I 33 ,4 r 35 7 MORTAR LAYER This invention relates to a device for laying mortar.
In the construction industry the mode of laying mortar on concrete blocks or bricks during the construction of a wall or the like has not appreciably changed over the decades and centuries. for a trowel has been used to convey mortar onto the block or brick and to spread the same over the surface thereof so that another block may be layed supcradjacently thereon as those common in the art will know.
With increasing labor costs and labor contents costs of construction have increased.
It is an object of the invention to provide a carriage device for laying mortar on the surface of the blocks which are interlacingly layed into blocks and the like.
It is another object of the invention to provide a device for laying a uniform width and thickness of viscous mortar onto a surface.
The invention therefore contemplates a mortar layer for laying viscous mortar of a uniform width and thickness onto a surface comprising a body disposing an internal chamber having an upper viscous mortar storage region and a contiguous depending leg region extending into a terminal opening. an agitator disposed within the chamber and extending into the contiguous depending leg region for shaking the viscous mortar therein. means to activate the agitation, and means for moving the body along the surface and to constrain the terminal opening at a predetermined distance from the surface such that viscous mortar of uniform thickness and width is deposited onto the surface as the layer passes over it.
The invention will now be described by way ofexample with reference to the accompanying drawings in which:
FIG. I is a perspective of the embodiment of the invention.
FIG. 2 is a section along lines Il-ll of FIG. 1.
FIG. 3 is a perspective of the embodiment of FIG. 1 in use on a row of bricks.
Referring to FIG. I a mortar layer 10 includes a body 11 mounted on four adjustable wheels 12. Preferably the body 11 has a post-step slot arrangement I4 at each corner to carry the axis of each wheel 12 and to adjustably place the wheel at predetermined positions relative to the base so as to carry the body at different selectable heights from a running surface. The body I] displays an internal chamber of two marginal depending legs 17 having lower terminal openings 18. The upper portion of the legs respectively communicate across the crotch into an upper unitary contiguous storage region I9. A vertically movable agitating member 21 in the shape of an inverted V and in the vicinity of the storage region 19. extends over the crotch and down along the internal portions of the legs 17 as more particularly seen in FIG. 2. Along the outer margin of each of the depending legs extends a second movable member 22. Each of these movable members 21 and 22 are attached to a horizontal bar 23 which is linked by a projecting loop straps 24 to respective throw-arms 26 of a rotatable crankshaft 27 which straddles over the top of the body I I and extends outward from the body to dispose tips of the crankshaft 27 away from the body. Onto these projecting tips of the crankshaft 27 can be affixed at crankshaft 28 on either side of the body 11. The crankshaft 27 is rotatably secured to the upper part of the body through appropriate bushing members 31.
Along the rear margin of each leg region 17 is slot 30 and adjustable closing gate 31. The slot 30 communicates into the leg regions and permits. as the layer is moved over a running surface. such as the row of bricks 36 of FIG. 3, mortar 39 to be deposited in the running surface 37, in two streams 40 along the margins of the row. Further. adjustable curbs 33 and 34 are provided along the lateral sides of the leg regions I7 near the lower terminal opening 18. The curbs 33 are adjustably secured to the margin by the thumb screws 35. The dis tance between lower edge of the curbs 33 and 34 relative to the running surface 37 will determine how wide a stream of mortar can be layed.
In operation, referring to FIG. 3, the layer 10 is set on a row of blocks 36 such that the wheels 12 straddle the margins of the blocks 36. The layer is propelled by hand against one of the carrying handles 29 and the viscous mortar 39 within the storage region 19 is conveyed through the legs and terminal openings onto the block as two continuous uniform streams of viscous mortar 40. In order to assist the deposition of the viscous mortar from the storage region 29 the other hand of a person is used to rotate the crank 28 and to cause the members 21 and 22 to vertically reciprocate vibrating the mortar 39 temporarily enhancing its viscosity and ability to move through the legs 17 to the terminal openings 18 at the base of the body 11. The thickness of the mortar 40 deposited on the bricks is dependent in part upon the slump of the mortar as well as the vertical displacement of the body 11 above the surface of the bricks and the speed of rotation of the crank 27. After some experience a user will know the parameters required in order to provide uniform deposition of visi cous mortar onto a laying surface. Additional control of the uniformity in thickness and width of the deposition of the uniform viscous mortar 39 can be obtained by varying the wheels 12 in their respective slot arrangement 14 or by changing the position of gates 31 to open or close the slots 30 or both; alternatively, the curbs 33 and 34 can be raised or lowered.
The embodiments of the invention in which an exclusive privilege or property is claimed are defined as follows.
l. A mortar layer for laying viscous mortar of a uniform width and thickness onto a surface comprising a body having an internal chamber with an upper viscous mortar storage region and two contiguous depending leg regions relatively spaced a predetermined distance. said leg regions extending into terminal openings disposed lateral to the direction of movement of the layer. a single flat surfaced agitator having an inverted V- shaped cross-section including arms and an apex, the apex disposed within the storage region of the chamber and one arms fo the agitator extending into each of said leg regions, for shaking the viscous mortar therein. means to activate the agitator, and means for moving the body along the surface and to constrain the terminal openings at a predetermined distance from the surface, such said viscous mortar of uniform thickness and width is deposited onto the surface as the layer passes over it.
2. The layer of claim I wherein means for moving the layer includes means for disposing the terminal opening at selected predetermined distance from the surface.
3. The layer of claim I further comprising means for controlling the amount of mortar disposed on the surface.
4. The layer of claim 1 further comprising a slot disposed in the rear margin of each leg region through which mortar is disposed on movement of the layer.

Claims (4)

1. A mortar layer for laying viscous mortar of a uniform width and thickness onto a surface comprising a body having an internal chamber with an upper viscous mortar storage region and two contiguous depending leg regions relatively spaced a predetermined distance, said leg regions extending into terminal openings disposed lateral to the direction of movement of the layer, a single flat surfaced agitator having an inverted Vshaped cross-section including arms and an apex, the apex disposed within the storage region of the chamber and one arms fo the agitator extending into each of said leg regions, for shaking the viscous mortar therein, means to activate the agitator, and means for moving the body along the surface and to constrain the terminal openings at a predetermined distance from the surface, such said viscous mortar of uniform thickness and width is deposited onto the surface as the layer passes over it.
1. A mortar layer for laying viscous mortar of a uniform width and thickness onto a surface comprising a body having an internal chamber with an upper viscous mortar storage region and two contiguous depending leg regions relatively spaced a predetermined distance, said leg regions extending into terminal openings disposed lateral to the direction of movement of the layer, a single flat surfaced agitator having an inverted V-shaped cross-section including arms and an apex, the apex disposed within the storage region of the chamber and one arms fo the agitator extending into each of said leg regions, for shaking the viscous mortar therein, means to activate the agitator, and means for moving the body along the surface and to constrain the terminal openings at a predetermined distance from the surface, such said viscous mortar of uniform thickness and width is deposited onto the surface as the layer passes over it.
2. The layer of claim 1 wherein means for moving the layer includes means for disposing the terminal opening at selected predetermined distance from the surface.
3. The layer of claim 1 further comprising means for controlling the amount of mortar disposed on the surface.
US384959A 1973-06-07 1973-08-02 Mortar layer Expired - Lifetime US3887114A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA173,524A CA975140A (en) 1973-06-07 1973-06-07 Mortar layer

Publications (1)

Publication Number Publication Date
US3887114A true US3887114A (en) 1975-06-03

Family

ID=4096944

Family Applications (1)

Application Number Title Priority Date Filing Date
US384959A Expired - Lifetime US3887114A (en) 1973-06-07 1973-08-02 Mortar layer

Country Status (2)

Country Link
US (1) US3887114A (en)
CA (1) CA975140A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4294383A (en) * 1980-01-18 1981-10-13 Hession Industries, Inc. Mortar applying device
US5035352A (en) * 1988-03-04 1991-07-30 Frank Mania Adjustable apparatus for spreading mortar and method therefor
US5193723A (en) * 1991-10-28 1993-03-16 A. J. Everett Mortar applying device
EP0640732A2 (en) * 1993-08-31 1995-03-01 BAYOSAN WACHTER GmbH & Co.KG Arrangement for applying glue or a thin mortar layer
US6460581B1 (en) * 2001-04-23 2002-10-08 Kenneth Gene Marshall Wall hopper
US20050262800A1 (en) * 2004-05-27 2005-12-01 Norman Hancock Mortar applying machine and block for use in conjunction therewith
FR2952098A1 (en) * 2009-10-30 2011-05-06 Entpr Generale Leon Grosse Method for providing e.g. reinforced concrete wall in construction industry, involves separating two parallel walls by space in which panel is made of material thermically insulator and wall is provided continuously in casting in situ
US20120291917A1 (en) * 2011-05-17 2012-11-22 Csaba Bera Method, system, and apparatus for directing fluid flow
EP2295674A3 (en) * 2009-08-19 2014-04-16 Maxit oy ab Hopper for spreading mortar
US9157246B2 (en) 2011-05-18 2015-10-13 Douglas S. CAMPBELL Method and apparatus for selectively extruding and applying a layer of mortar upon a selected surface
FR3079253A1 (en) * 2018-03-21 2019-09-27 Jose Goncalves Afonso MORTAR INSTALLATION DEVICE ON THIN-EDGE HOLLOW HOLLOW MASONRY BLOCKS

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4352445A (en) * 1980-03-24 1982-10-05 Philip Cusumano Building material applicator
US6370837B1 (en) 1999-08-04 2002-04-16 Anthony B. Mcmahon System for laying masonry blocks

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US358303A (en) * 1887-02-22 Eichaed b
US771104A (en) * 1904-05-24 1904-09-27 John Clarence Sparks Fertilizer-distributer.
US1833582A (en) * 1929-02-04 1931-11-24 Kavanagh James William Bricklaying machine
US2325970A (en) * 1942-02-26 1943-08-03 Walter R Myers Sander
US2683981A (en) * 1950-08-24 1954-07-20 Robert C Richey Mortar depositing device
US3148432A (en) * 1962-05-08 1964-09-15 Jr John M Garnett Mortar spreader
US3162886A (en) * 1963-04-26 1964-12-29 Wise James Roy Mortar applicator
US3545159A (en) * 1968-07-23 1970-12-08 Max E Brewer Mortar spreader
US3791559A (en) * 1972-12-29 1974-02-12 A Foye Hopper-type mortar spreader

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US358303A (en) * 1887-02-22 Eichaed b
US771104A (en) * 1904-05-24 1904-09-27 John Clarence Sparks Fertilizer-distributer.
US1833582A (en) * 1929-02-04 1931-11-24 Kavanagh James William Bricklaying machine
US2325970A (en) * 1942-02-26 1943-08-03 Walter R Myers Sander
US2683981A (en) * 1950-08-24 1954-07-20 Robert C Richey Mortar depositing device
US3148432A (en) * 1962-05-08 1964-09-15 Jr John M Garnett Mortar spreader
US3162886A (en) * 1963-04-26 1964-12-29 Wise James Roy Mortar applicator
US3545159A (en) * 1968-07-23 1970-12-08 Max E Brewer Mortar spreader
US3791559A (en) * 1972-12-29 1974-02-12 A Foye Hopper-type mortar spreader

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4294383A (en) * 1980-01-18 1981-10-13 Hession Industries, Inc. Mortar applying device
US5035352A (en) * 1988-03-04 1991-07-30 Frank Mania Adjustable apparatus for spreading mortar and method therefor
US5193723A (en) * 1991-10-28 1993-03-16 A. J. Everett Mortar applying device
EP0640732A2 (en) * 1993-08-31 1995-03-01 BAYOSAN WACHTER GmbH & Co.KG Arrangement for applying glue or a thin mortar layer
EP0640732A3 (en) * 1993-08-31 1995-08-16 Bayosan Wachter Gmbh & Co Kg Arrangement for applying glue or a thin mortar layer.
US6460581B1 (en) * 2001-04-23 2002-10-08 Kenneth Gene Marshall Wall hopper
US20050262800A1 (en) * 2004-05-27 2005-12-01 Norman Hancock Mortar applying machine and block for use in conjunction therewith
US7743586B2 (en) * 2004-05-27 2010-06-29 Save Block, LLC Mortar applying machine and block for use in conjunction therewith
EP2295674A3 (en) * 2009-08-19 2014-04-16 Maxit oy ab Hopper for spreading mortar
FR2952098A1 (en) * 2009-10-30 2011-05-06 Entpr Generale Leon Grosse Method for providing e.g. reinforced concrete wall in construction industry, involves separating two parallel walls by space in which panel is made of material thermically insulator and wall is provided continuously in casting in situ
US20120291917A1 (en) * 2011-05-17 2012-11-22 Csaba Bera Method, system, and apparatus for directing fluid flow
US9157246B2 (en) 2011-05-18 2015-10-13 Douglas S. CAMPBELL Method and apparatus for selectively extruding and applying a layer of mortar upon a selected surface
FR3079253A1 (en) * 2018-03-21 2019-09-27 Jose Goncalves Afonso MORTAR INSTALLATION DEVICE ON THIN-EDGE HOLLOW HOLLOW MASONRY BLOCKS

Also Published As

Publication number Publication date
CA975140A (en) 1975-09-30

Similar Documents

Publication Publication Date Title
US3887114A (en) Mortar layer
EP3626420B1 (en) Concrete structure manufacturing apparatus and method
US4056423A (en) Platemaking apparatus
EP1017554B1 (en) Method for producing concrete stones, especially paving stones, building stones or such like
US4280800A (en) Concrete slab surface finishing apparatus
JP2000502624A (en) Method and apparatus for forming a pattern on a casting
JPS63142108A (en) Compaction bank construction method and machine of hydraulic constructional material
US4135651A (en) Device for applying mortar
US5125814A (en) Brick laying tools
JPS5674354A (en) Method and device for largely changing strand in continuous casting
US2630703A (en) Plaster applicator
GB2245919A (en) A pointing device
DE2032792A1 (en) Method for introducing hardening building material into formwork and device for carrying out the method
SU622921A1 (en) Placer of combination revetment of canals
CN215055537U (en) Mortar smearing device for wall building
JPS6255373A (en) Concrete leveling apparatus
JPS59173404A (en) Coating thickness controller of road surface coating machine
US1125146A (en) Mortar-spreader.
GB2208677A (en) A mould for bricklaying
JPS6243084Y2 (en)
JPH0560769B2 (en)
IT201900016910A1 (en) Apparatus and method for producing a decoration in ceramic slabs
JPH0344804Y2 (en)
JPH09108608A (en) Power dropping device for tile decoration
SU887191A1 (en) Apparatus for applying coating on article