US2451960A

US2451960A - Method of and apparatus for painting bevels

Info

Publication number: US2451960A
Application number: US530340A
Authority: US
Inventors: Krajci Samuel; Leon E Savage
Original assignee: Celotex Corp
Current assignee: Celotex Corp
Priority date: 1944-04-10
Filing date: 1944-04-10
Publication date: 1948-10-19
Anticipated expiration: 1965-10-19

Description

4 Sheets-She-et 1 Oct. 19, 1948. s. KRAJcl. ETAL METHOD oF AN APPARATUS FORPAINTING BEvELs Filed April 10, 1944 Oct. 19, 1948. 4 s KRAJCI ET AL A 2,451,960

- METHOD OF AND APPARATUS FOR PAINTING B EVELS Filed April 1o, 1944 '4 Sheets-sheet 2 l O l I y gym.

oct. 19, 194s'.

5. KRAJCI ETAL ,-METHoD oF Am) APPARATUS FOR PAINTING EvELs A Filed April 1o, 1944 4 Sheets-Sheet 3 ,to wa f -A l S, KRAJCI EIAL METHOD oF AND APPARATUS'FOR PAINTING BEvELs Oct. 19, 1948.

- Filed April 1o 4 Sheets-Sheet 4 f/ l f/ Patented Oct. 19, 1948 ENT omet-. 1

' PAINTING BEVELS METHOD F AND APPARATUS `Foa Samuel Krajci and Leon E. Savage, New Orleans, La., assignors toThe Celotex Corpora-tion, Chicago, Ill., a corporation of -Delawaref Application Amir- 1944seriar Nd 539,340

of applying paint to bevels, orthe like, on tile o1` generally similar units in production, and relates` to the; method of painting. thelbevelsand ,to the apparatus for accomplishing such objective.' While it is a relatively simple matter tor apply acoating or to paint the `surface of a tile or like unit in production, it has been found tobe very diicult to apply a satisfactory coating to a bevel iisuch is provided at the .edge of the unit. The bevel being angular with respect to the surface ofthe unit, itA followsin any ordinary application of paint thereto, that the paint tends to run down the bevel and collect along the lower edge thereof, leaving little .or-no paint `on theupper` partof the bevel, and thus a satisfactory resultis very diicult to obtain. According to the invention hereof, the` method of painting the bevels is such that, while the diiiiculty of the paint tending to run down on the bevel and to collect on the lower portion thereof is not obviated, such is offset ata stage, in the processing wherein any` excess of paint which has accumulated along the lower part ofthe bevel is redistributed over the width of th ebev` eled` surface under conditions whichprevent. theapplied coating ,again` running downv the beveland col-, lecting along the lower portion thereof..v The method of painting bevels,fwhich is disclosed `in detail herein, `involves conveying-.the units alongy alhorizontal path, rand wherein, as the unit progresses alongits path, the beveled portions thereof are subjected first toa hot burn-v ishing, followed by the application Vof paint to the bevel, the removal of excess paint, apartial dryNv ing of the applied paint, redistribution f of and final drying of the applied paint coating on the bevels,and finally an `ironing operation. which smooths out any slight overlap of the applied paint coating on the horizontal surface. l i The apparatus for carrying out the foregoing described method for the paintingV of bevelscom-v prises suitable framework supporting a conveyor for conveying the units through a horizontal path, and also supporting along such path the various apparatus which are required Aforcarrying out the method of painting, andwhich comprise the burnishing devices, the paint supply SYS: tem, including paint discharge nozzles, 4air jet nozzles, a drier section, beveled heated rolls for the redistribution of andorying of the applied paint, and nally the surface roll. It is to be understood that with the` apparatus as illustrated and described, the two opposite edgebevelsof a unit are painted, and thatforthe paintingcfthe othe r"two opposite edgesthe unit, afterV being turned is either again run throughl the ap, paratus or there is provided a similar apparatus whichmay be arranged so as to receivethe units` fromthe first apparatus andtake them oil' at right, angles, or thesecondapparatus maybe arranged directly beyond the first apparatus with interveningmechanism for turning theunits 90 as` they `pass'from the first to the second ape'. 1`)aratuS. l The invention hereof will be described in detail in connection with the accompanying'drawings, wherein: n Y

' Figure 1 is a plan view ofthe apparatus; v Lligure 2 is a side elevationof the apparatus; "Figure 34 isa section vof the apparatus taken on line 3-`-3 of Figure 1 showing the painting sys@ tem; Q Figure 4 is` an Aenlarged detailof the painting nozzle; ,l ,i

`Fig 1`1re 5 is a plan View further,illustratingde` tailsofsthe paintnozzle mounting of Figure 3; igure 6 is a section takenvon line 6--6 of Figllrel;` i t y liiguref is a sectional` view on line l-T of Figure6; v

Figure 8 lis enlarged side elevation of the burnishing ronshown in `1iig uresY 6 and 7; v

Figure 9 is an end View of the burnishing iron showninFigureS; i l Figure 10 is a planview taken overv one ofthe air jet nozzles; A Y .Figure 11 isI an elevationof the structure shown in Figure 10; l l

, Figure 12 is a detail illustrating an air nozzle; Figure 13 isa ysection taken on line` I3-l3 of Maurel;

Figurefll is -a side elevation of-the structure shown in'Figure 13; and, l 1

Figure `15 is a sectionalview taken` on 5-l5 of Figure V13. l v In thedrawings, thetapparatus is shownas comprisinglsuitable framework, suchaslegs 20 on which are mounted longitudinal-rnembers'such as l2| and 22to constitute a generally table-like structure `or framework. f On thev framework of the apparatus there'is mounted aconveyor mechanism comprising the conveyor beltl 23, which is trainedover suitable idler rollers 24 and live roll` 25, a driven roll which drives the conveyor 23 and` inturn is driven from a prime mover by asutable drive shownu as belt 26 driven from prime mover units comprising an electric motor 2,1and `speed reducer 28. As vwill be readily understood, when the prime mover unit operates to line only severalare shown in the drawing at the right n end portion ofFigure ,-2. The cleats or dogsware suitably spaced 4to lreceive the tiles or units which are to be operated upon, and they not only serve4 to position the units on the conveyor belt, but

they also serve to slightly spaceV the'-units-1:one:AV from another as they are conveyed through-the" process of painting the bevelstheremv Y Tiles or units, the bevels fof-l which. are. to v.be painted, may be units of material cut tofthe,

proper size and provided with bevels or preferably, the units, the bevels -of which are to"-be` painted, will have already had a surfacecoat ap- 1 seen in Figure 2, where they:` may be fed `Ito the" machinefrom l fee`d"'t able 301,. or a stack. of these. units may lc e"pl'a'ce'd"in` the'feed hopper 3I.`from which they arepicked up, one byv one,.by thedbgs 29 on .the conveyrnfz'.- 4

As'agtitle unit is `picked 'upv by the conveyor "and starts on its travelth'rough .the apparatus, there.

is'rstencounteredan edge burnis'hing iron which is located at .station32 where.the heated burnish- When sur.-

ingiron, which is1 disclosedin detailin'Figures 6 to 9, burnishesthe beveled edges so as to provide a` smoother-surface' `for the application o'f' vthe paint coating. The' burnishing iron. andits mounting, shown 'in detail inFigures 6 to'9',' com prise an iron body 33 havingl an ironing, facelor portieri' 34"which, as shown,A is preferably some,- What curved on its forward end,` as at. 3.5", sothat thetileor unit, the .bevel of whichis .to be ironed,l may readily pass underthije"ironing'iace; While the'-exa'ct"shap'e:ofthe"burnishing iron body 33 is relatively immaterial, itis illustrateda's agenerally' annularmemher, whichadjacent' each .end has formed thereon a square portion""36"`jproviod1ng forfthermounting'or theiron body'33 in a rguideway 31 so that the iron body may movewitha limited vertical-movement, willl'be'prevented `-from turning'inits mounting, lanclthe*ironlngacer34 may be pressed into contact with the surfacefof thev-bevel which is'tobe i'roned or' burnished. The square portions 36 Ionjthe'i'ron bodies 33' are mountedfiniglide-waysv-y 31T, and'` the square portion 36, in cooperation with- :thee-faces* of the guide-'way 31 provide f ra'linr1i"ted verticaivmovement vof "'the iron 1body'33'," 'and' it"is"evident"-that the-"iron body will=be^ preventedjfrom turning; By ithe provision 'ofi springs 3'8 positioned between theyok'e-l portion i of the -guideway 311 and the upper face-of the square-portion' 3l5onv the' iron '33, the burnishingf-firon face" 34 is' conse'- quentlyi at lall times `'spi-'ing-pressed f against the surface'tofbe burnishedl The' annular ironlbody 33 isadapted to receive lwithin its fcentralopeningl a suitable heating meansfwhich; mostv conveniently, isfan" electrical `heater whichy may'rb'e slid into'fthefv-annular openingeand mayibeeconnectedfbylwires 3W-'to' a suitable source'f liel@L 4 trical energy, and in connection with which it will, of course, be understood that suitable variable resistance or the like will be included in the circuit so that the temperature of the burnishing iron face 34 can be controlled and maintained at the desired temperaturee.

The bunnishing' ironsa 3'3 faie:frn'ounted,l one on each side ofthe apparatus, so 'that two edges of a ltile or unit may be burnished as the tile passes "the burnishing iron station 32, and the burnishing. irons `areishown as mounted on cross memb'ers4which extend across the width of the apparatus, and aremounted at their ends on lugs 41g whichare welded or otherwise suitably con- ,Wnectede-tothe'framework of the apparatus, and

in connection with which wing nuts 42 are providedfor securing the mounting member 40 securely in place.

For burnishing the beveled edges of tiles or units fabricated fromiiber insulation board, and particularly from .b'agasse ber board', the ntemperature isiprefcrably maintained at'zaround "500" F. .which,vit has beenzfound, isa suitabletemper ature' for accomplishing, the desired" burnishing' action, particularly when the tiles areibeingconveyed on the conveyor23 at'a'lineal speed'ofab'outI 52 ft; perl minute, lwl'iich is' roughlyv 1- it. per second, with theresult that'a'tile11 f1: long will' pass under thek burnishingl` irorr' in' approximatelyf 1 second. Actually; on an apparatus suchas-jis. disclosed operating at 52 "ft. perminutef,thienum; ber oftil'es handledperininute', due toitherjfact' that they' are spaced' somewhat' on the conveyor; is 42v tiles'per minute, which would mean that "a; t'i'l'e wouldbe'underthe burnishing iron forqapproximately three-'fourths ofk a second, butthis'v allows sufficient time for a good,ismoothburnish ing of. the beveled;` surface. Itrorn'v the burnishingrfiron: station 3,2,l the vtile is then. conveyed to the .paint :application station 4'5, at `which point painti spray nozzles, vshown in more .detail in Figures 3 and 4, discharge paint onto-the "bevelstobe coated; The edge painting system,pwhich is ,positionedat' station; 45., com#- prisesa paintv tank andaV pump A,wjriiclri pumps'the paintfrom' the tankto the paint nozzles which' dischargethe' paint: onto th'e'fecilgev bevels; with the excess 'running dow-n over the edges ofithe tile and'being caught', in the upper Apart of the painttank'which isairaredn hopper, thenowing through a` screen and returning'toA tire body" of paintin the paint tank; 'Ihep'ainttank,A which is shown atl 46, is lmerely al receptacle for 'the paint; buty whichv'is'preferably, provided 'with' av paint stirrer '41"so as 'tokeep' the 4paint 'inP the tank thoroughly mixed.` Pai-nt is drawn'oiffrorn the bottom ofl tank '46 ley-pipe48'which'discharges to pump 49' driven ybyprirne mover 5l),r which' is indicated as an electric motor. 'Pump'f49 pumps the paintup through pipe 5Il to supply` paint sprays or nozzlesA 52; The paint'nozzles 52/'are suitably mountedY onl cross members which' are vsimilartothe*cross'members"Mlparticularly"dese cribed in `Aconnection 'with the mounting of .the burnishingirons, 'and has a" mountingthereon: for the-'purpose'of adjustment, which is 'clearly obvious' Afrom-the drawingiwithout detailed descrip"- tion' thereof",` an'd'since various" equivalent modi` flcations of 'the'mounting'might'"be adopted, such willfnot bedescribed` in detail.' Itis merely to be ynotedthat the paint nozzlesr 52 are preferably so-mounted on cross-member40ffthat they Amay be adjusted universally" with' respect to the' bevel to :helpainted' and; lasillustrated,y this-'as accom'- pl'ished" by' the provi-sion of 'clamping'mountings 53 and `154 arranged one at" right angles to the other.` The paint nozzles 52 are illustrated as discharging approximately parallel to the surface to-` be 'coated, and so arranged that a slight amount of paint will be deposited along the edge of the top surface of the tile adjacent the beveled surfaces.` Of course, with any particular type of nozzle the best angle of the nozzle, with respect to the beveledsurface, for obtaining a good coating can only be determined by adjustment as the apparatus is being operated, and it is contemplated that the exact adjustment of the nozzles will be made when the apparatus is in operation. The paint. stirrer 41 in the paint tank' is mounted on'a shaft 55 which is carried through the sides of theY tank in stufng boxes 56, and the stirrer is suitably revolved as by a pulley 51 mounted on shaft 55 and driven by belt 58.

Afterthe bevels of the tile unit are painted at station 45, the conveyor 23 carries the tile to station {S0-*where there are provided air jets for blowing excess paint from the edge bevel and adjacent thereto. The air jets for blowing the excess .paint from the edges of the tiles are prev ferably ribbon-like jets; that is, wide, thin jets of air such as would be discharged from'the orice `6| provided in air jet head 62', The air jet heads are mounted, as shown in detail in Figures 10 and 11of the drawing, on cross members 63 which are suitably mounted on elements of the framework of the apparatus, and are mounted thereon with clamping connections 64 and-65 ar"- ranged at right angles, one to the other, so that the'nozzles are mounted on a universal mounting with respect to the tile bevel. The air jet heads 6 2 are preferably positioned so that the air jet issuing vfrom nozzle 6l is directed substantially parallel to the painted bevel, but preferably a portion of the jet strikes the surface of the tile just behind the beveled edge so that anyexcess paint which has flowed onto the tile surface will be blown off, as well as any excess paint on the painted bevel. The air jet head 62 is suitably connected to an air supply 66 through which air under pressure is supplied to provide the desired air blast at the air jet orificev El.

It will beV noted, as isparticularly shown in Figures 3 and 6 of the drawings, thatthe frame- Work of the apparatus includes cross members 10 on which are mounted horizontally extending slideways 1l on which tile units being processed are carried along by the conveyor belt 23 being pushed or propelled by the cleats or dogs 29 secured thereon. These slideways 1l may be of any suitable material, such ashardwood or smcoth finished metal, or the like, astheir function is merely that of supporting the tiles being carried through the apparatus and to provide a surface along which the tiles slide as theyare propelled through the apparatus. i

After the excess paint has been `blown from the edges of the tile by the air blast at station 60, they are carried by the conveyor to an elongated drying section where the edges of the tile pass under'the horizontally extending pipes 13 which are positioned over the beveled edges ofthe tile as they are carried along by conveyor 23. These drier pipes 13 are merely lengths of pipe, conveniently 3/1 inch pipe, drilled on their under side with small holes about ggz inch in diameterspaced 1 inch apart. These drier pipes 13 are supplied with heated air from an air heating furnace 14 inwhlch is positionedan air heating coil'15 which supplies. the drier pipes 13. The air heating furnace 14, shown in the drawing, isrmerely a diagrammatic 'source "of heat for heating the drying air, `and it may actually constitute any suitable means for heating the air `supply to pipe 1I,` and the required heat'for heating the air may be supplied either by gas jets, byelectrcal heaters, by steam, or other heating unit. `Air under a' slight positive pressure is fed to the` air heating coil 15, and from there the heated air passes `out through the drier `pipes 13 issuingv on' the under side from the small drilled holes referred to, to provide heated air currents blowing down over the path of the painted bevels of the' tiles as they are propelled alongthe 'section of the apparatus over which the drier pipes 13' are positioned. "Beyond thepaint drying section of the appara- `tus there is provided a beveled edge hot iron whichserves the dual purpose, to some extent, of "redistributing the paint coating which has been `applied to the coating, as well as to iron and smooth 'thepaintfcoating andiin a`ddition` this beveled hot ironing apparatus serves .to

completely dry the paint coating which prefer-` ablyisfnot dried completely bone-dry under the drying pipes 13 of the drying portion of the apparatus. l

The bevel hot ironing section or station oflthe apparatus is indicated generally at 80. The detail ofthe bevel hot ironing portion of the apparatus is shown in Figures 13 to 15 and wherein there isV shown an insulated housing 8| in which this portion ofthe apparatus is housed. The bevel hot,

ironing i apparatus comprises the housing 8l referred to, suitably positioned over the conveyor portion of the `apparatus and having mounted therein f the heated bevel irons.` Heatedbevel irons 82 are narrow cylinders with (bevel faces corresponding to the bevels to be ironed, and' which are mounted on a driving shaft 83 `mounted in journals inturn mounted in vertical journal guide-ways 84 for vertical movement, and pro-l gas flames issuing from the gas burner 88 impinge upon the bevel hot irons 82 to preferably maintain the beveled surfaces thereof at about 600 F.

fi `Ihe'bevel` hot irons 82 are preferably of relatively large diameter, that is in the neighborhood of 18 inches, and as such should be driven at a speed which is substantially thatof the linear rate of `travel of the units thereof, the bevels of which areetc be hot'V ironed. As'the units, the bevels of which have been'coated with paint ata preceding station inthe apparatus with the 'paint coating substantially dried in the drying portion,` are carried along by the conveyor under the hot roll ircns82, these irons revolving against the coated and substantially vdried bevels serve somewhat to redistribute the 'paint coating thereon uniformly should it not be uniform; the action lsmoothsv the surface of this paint coating and the heat of ironing completes the drying of the coating'. v

. The conveyor now carries the almost finished unitsunderf surface rolls which are relatively narrovv rolls that operate against the surface of `the tiles adjacent the edge bevels. In paintingthe tile bevels it is preferred that the paint coating antigeen@ 'Z appliedil'aprsligiitlysento; fthe: top, surf acer! er1- the tile; 1 butisincethis ioverlap isfquite .like1y lto :show unless; ittfis given :some treatment,- there i areiproe videdinarmwrfsurface .rolls whiehhaveibeen. re.-l ferredto: and, -Whichzxserve toxsmoothfidown and: even outzzthifsnlightf.overlap-of theepaint coating:y ont-.f the 1 surface .o 'thefftiles-vadj aoent -thei-bevelssoiftliisfnverlap is'inot :noticeable:l vvThe4 surace-, roll'sire erred ituv :areesiiovvntatI i90-and azi-e merely narrowlztcylinders; preferably.; about Zfincl'ies:mide,v soipositionedsas to :operatezagainstthe top surfacel thefztile adiapentzithe :bevelsi These.surface` rollsMawhichiifliiesired,may be somewhatiheated: by? gasiietsnplayedfth ereorr; areimountedfonaishat. 9| driven by belt 92 which driveszagzfpulley =9f33 mounted onithe shafts if; Shaita I :wille ofcourse, bezund'erstoodsto'-becsuitablyjimountediin bearings; preferablycinountedcin r journal guides', .similare ito,v j-'ournaliguidesfand springfpressediasibyrsprings; Sii; 'athen journal.:v guides; of; zcourseibeing:suitably: momitedionzthe'framework:ofi the apparatus. the :tiles are carried along under these driven:

surface rolls 9B uth'evf --serveV =to :smooth: out` and..

uniformly :distribute ithea-smallabeaxdfofpaint .which may beton the fsurfazce of: the tiles: adjacent, the, bevel, and thus this paint overlap is madetinnonfspicuousa'` ...ritterv the .tilesrpassthe surfaceI rolls 90 they maybethenntaken :fromthe' conveyor vat the far end of the :apparatus 'iIhez paint .which iszpreferred for painting the bevels,particularlyotiiberboard tile, is a so-calleclV oasein'water paint' Which',` basically,` consists of` caseinkdissolved ywithv lime as the adhesive, and carryingzsuitable ller and: pigment toprovide a. coatingroi' the color-desired. For a white paint coating, vordinarilyrthe lWhite coloris Aobtained by theuseefvrlithopone pigm'entand'a White clay as a 'ller.' TheSeJcaSBinWater paints, eitherin powder or' ipaste 'f orm, are; generally f available on the market; and etliosefskilleduinthe Yart involved lrnowl the compositionof; these paints and understand their: application. Therefore, it is felt` that a.y detailed explanationwith` respect `thereto is entirely unne'cessary'and consequently such is not given'.

Briefly summarizingztheoperation of providing painted :bevel's on'itilefunits vand ith-e like-antipartioularlyuon ltile .unitsv fabricated :from pre-painted' I'iber insulation board; thesequence-of operation istasifolloWs:V f

-The fabricated tile units f having'edgebevels, are propelled through'a horizontal path on suitablesupport'means by means of' aconveyor. The conveyedtiles `pass underhot burnishing ironsr which fsmoothtdown and' burnish the ,bevels; then the tilesfpass under'paint'applying nozzles which applylpaint'to fthebevels, the excess running down overl-the edge of4 theA tiles and being returned toftheupaint tank from whichritis -recirculated After- .the paint 'coating hasv beenv applied toV the bevels;- 'theftiles vpass under airj'ets"which 'blowany excess paint'fromthe'bevels',` yand-'theythen passito :ai drier section where" heatedzrair blowing against 'the 4.painted '.bevels'substantiallyf 4dries :the paint.. `From the drying seCtionthe'tile,A with-:the bevels covered with paint and substantially dry, passes :under the `bevel hotrolls Wherethe vheated hot rolls f. smooth out and conipletefthei drying of the paint coat on the bevels, and from this stage the-tiles passA ontto be -carriedrunder lface edge rolls: which: roll i down andi". smooth outfanyf paint which has 'overlapped' :fromN thezbevelonto the upperzfacerof the tile.

the foregoing it Willlbeseenthatthere has been qnovided anvapparatus '-withofaffpluralitm dfi stages carrying out:itnezfdifferentfmnel'abimr@ are. .required .for obtaining au good-pai1rt` coating upon'. a bevelsedged :surface iofi-aatileflikei 1 memb-emnanrticulariyronefthe base ofiwhichfis insulation board. Thei Variousoperations .aofi 'hat burnishirrg: the csurf ace :fto :benpaintediiapplyinmiaz surplusf paint; lrerrroval oi-the excesss-.empliedi paint; by an airrr'jet', ithe partiahdrying; rend' nucl@y 13" fthe; bevel.: het rolling; toruniformlyy :distribute theffpaint coatingffon thefbevel andviullydry'ngt Withxthezsubsequentfsstep fofl smoothing out .-1 overlapfon theffaceffofithestile; constitutesiwsemes o'ff :operations: which'.fvery; -satisfactorilyI faccom'- plishes-fthe; desi-red result" 'of' obtaining ai smooth. andifsatisfactory Apaint.coating: on. the-beveled,

edge.L 'o l i In the foregoing thereiisdescribed inrdetailithe methmijfor applying assmoothffinishngmoat;iplr- 'ticularlyfito aI 4bei/el ori like-inclined L surface; .and there-'flies been; inwaddition, :d'esciibedinr-detail; the :apparatus sorac arrying out? the fmethod -in .obf' taining fthe :smooth -f andfunifform rnisli.' Imaan 'nection withthe' various elementsaof thesa.j1: pariaiL tus.' itiiisz-z to; be: understood, Io'f ceurseijthatflthe Skilled iinnthe art' may; substitute equivalent:ele-i-` ments;A as; forv example; instead ofi dryingf theY pailznted` bevel'siin aicurrent :of hot airv, :then-might* alternatively befdried byuproviding 'ai batteria of radiant drying Slarnps,` etc., and itisintended .'.tlfuant` obviouszalternatives onadaptionsxmay beeutilized;

ii'. desired'. 1 v l What we claimfis.:

:1; 4Anfapparatus:'ifor.` applying-a liinishedefpaintf ccatingito abeveljfaceacompri'sin'g in combination aheatedibevel -burnishinga-iron, zavpaintwapplyirtg; means, 4Ine-ans. removing '-exeessf 4applied paint; means: iorldrying theI applied; paint coatinggiapressure ap plying- :bevel :het :roll .andria zconve'yorr conveyingan; article; vhaving aibevel ,edge'i-:successsivelyrpast'the:aforesaidfelementsiof itheeapmwaftus Withfthefbevclzedgeinzoperativerelation {therefto.; l l

. Anfapparatusi providing a finislfnlngf,l sumace. coating comprising a 'plurality of:operativegmearns` in combinationwith-afcenveyorzfor ,conveying-the materialin operative relation thereto fand'whereitheioperaztiiffe meansv comprise a. heated @bur-e nishingiron; .a-ipaint"applying-nozzlc,.an air blast nozzle; av drying fapparatus,t and.-a.driven; boating' redistributing, smoothing? andfrdryings device:

l ,31.- `An `apparatus Afor applying nishing paint coating '.:to la bevel ffaoe comprising incombinatien a .conveyoniwA ccnveyingtheimafterial-tofbecoated int afsubstantially horizontal fplane'; ainozzle anew ciated in -.operative relation: with said-convener substantiallwovertthef:innerf.edgeof aibevel rtio-be coated; andidischarging the .coating material across. said bevel:-surfaioeg` a I coating/'circulating system comprising a pumpandconduitf,'theinozzle comprising a'vporti-onhof fthe circulating system, said I circulating. system receiving .and recirculating,` :excess coatingmaterialfflowing fofithe-ibevei; an *..ain fblast `nozzle positioned adjacent-.fthe bevel and discharging an"airnblast"substantiallyvnormal .to the;A coated ibevele-d.;surface; .fmeanswdrying the applied coating.,v land finally va :heated burnishing iron'having'ga heated ffacewhich `is zn'ormalytoifthn coatedl bevel', the 4-saiid' 'elements ofntheL combimiaw tion :being arranged inf-successive onder as fsetiout; Wiithzrelation thereof to the-conveyon ;such.-that the-.material .advancedifby the 'conveyorxisisuccexe sively: actedruponrby thesrsaidwarious :means-for applyingwthe rseeming material; forfuemovmgrrthe excessthereofand?iory partially drying the coute ing, yand Anally redistributing, completing the drying of and burnishing the applied coating.

4. The method of providing a smooth finishing coating on an inclined edge surface of a beveled berboard tile and comprising the steps: smoothing and burnishing the beveled surface with a heated iron, flooding the beveled surface by nowing a stream of a nlm-forming paint coating downwardly across such surface to be coated, immediately subsequently to .the application of the stream of paint coating, removing excess coating by means of an air jet directed substantially -parallel to and across the inclined surface, then .partially setting the applied material, and by hot ironing to redistribute, smooth and completely set the applied coating.

SAMUEL KRAJCI. LEON E. ISAVAGE.

10 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS