US2055318A

US2055318A - Apparatus for coating rollers

Info

Publication number: US2055318A
Application number: US651565A
Authority: US
Inventors: Charles F Smith
Original assignee: Rapid Roller Co
Current assignee: Rapid Roller Co
Priority date: 1933-01-13
Filing date: 1933-01-13
Publication date: 1936-09-22
Anticipated expiration: 1953-09-22

Description

Sept 22,1936- cyl-'1 SMITH y APPARATUS FOR coAfING RLLERS 2 Sheets-Sheet l original Filed May 21,l 1952 nFEz-z/Dl-f m C'Hnms FI SM/TH.

Sept. 22, 1936. c. F. SMITH APPARATUS FOR COATING ROLLRS original Filed Mayzl, 1932 2 sheets-sheet 2 Cf/AzLfs E .5M/TH.

Patented Sept. 22, 1936 l2,055,311; i i nernnnnnsnonioonanne noLnEns l fChnries F4 Smith, Chienne-.111.5 ,nssisnor ,toRn'nid Illinois AVRoller Company, Ghicago,lll., a. oor-poration of ,continuation of eppneatitn'sennl yNo.infinito,

rhis apiiiicationnlmnn- Tnory.1,si 11.933! Serial Nofi515565 E5 fClaimS. (61.91943.) f

ntie speeds, ,whereby einniiorni oontingof the de- This inyentionjreletes yto en 'apparatus ,for `coating or ,resurfacingof printing rolls. .with donating of slnredeterniinedethiokness in stoorde' ance with ,yaryingglequiiimeiiti Thenresentnnniiontioniis.n eontinnntionofirny application. entitled fnnnnnstnsioi' eontinnr printinero1.1.sSerin1 No. 6i2f1'1in1ediMny21;.1932- .Conted printers `rollers @reconstructed -nth n suitable bese to .inhioh is applied n snriaoeeoletine ofthe desiredlthiokness having@ composition similar `to ,the usual printing roll composition. It hnsfheietoforebeen nronosed to-ooostfnrresnrinoe printing rollslioy direotineisesinstn'iotnted i911 While in an inclined position, a fluid coating cornnosition innn ,ernennt substantially inenoessof that which willadiieijeiito andfremarnpnthe' roll, and then to place the eonted roll .innnnnight Qrendwise position so :esto permit en dwisefdrninnfg Ofthe Costing oomnositiondnrinethe 'setting or congealing of the 2composition yin place on the 179,11. Owingto ,the Afact that -printing ZrOlJS are of` vertline diameter (and may reoniteeontines of varyingv thicknesses; apparatiis iieretoforederelfined for Carrying ,ont this method of seating printing grolls not been entirely vsatisfactory for uthe obtaining, of t the desiredthicknesspf coatine on rolls of veriousdininetersl AAI t is therefore' an object of uthis `inyentiqm to provide lan apparatus for and .method of 1 coating printiherolls .andthe likey by niennsiof and ne' cording to which printingvrolls of varyingdiameter may be t 'coated with a tprinting l(roll `@entrinositionto the desired thioknessnniformiy and in a.` singlev operation `viitljioutthe 4neeesi-siiiy of` draining 'any surplus VVof the coating composition silhsequent tol .the actualv coating` step.

,It is afurther important'object of thisinven` tion to `proyidelan apparatus in `wlriich yprinting rollsA of ,varyingtdiameters y may be supported for rotation lnt vsrionsinngnler .ino1inntions depend ine' nunon' thethioknessoffthe oontingiidesited and 'wherein the speed -of` the Arotated |`'rolls may ,be

Yariedjin accordance with thedliarneter of the 13107171' to give siilgstantiallythe., samesnriace speed for roilsof different diameter, thereby eliminating the `ilaria,ble' introdued intothe coatingfoperation py `varying surface' speedsrof .rolls r,c f `difierent'. diameters. Y o

I t is 'a inrther'iinnortentoloieet of this inventignzto provide anappairatus'ior coating Aprintinglrolls andthe likewherjein meansj areprovided fori disposing a roll to Vloe coatedatf Varying align. larinclinations and the roll may be rotntedand theK strenni ofioentine .ieornnositioninnrfneginni/ed sione ,thennis of i the r'ollljnt :independentiy .Yetisired .thickness .indy `loe ,obtained .using .n'sinsie annnrntnsreenrd1ess-of theidiemetenof theniintine roll itnntis to betonteni .it isn ,further.nnnortsntnloieotlof this inventionto nroyidenn nnnnretns for testine printing rolls :in whiehmrovision inode .for `heating the fiuidocoeting composition ,to n dennite 1temperatnre sind maintaining .that teninerntnre .Within n narrow range in order :tornaintainiaisupstantially oonstent viscosity ofthe eontineeofnnosition and thereby eliminate-one nerisnle in the .obtaining oftoostings ofthe desired thioisness end uniformity l,Jit i,s`a .furthe r importantobject oftnisinvention to :provisie nn snnnrntnsior foontinexnrintine ".roilis having ineens .for lsontrennte the rete of ,nowofoontine Composition rto .therollerto be eonted nnd .nnvine menne ,for "reoironintng the snrnlns .oi testine eernnosition over that .Whioh is retninedon-theroii- ,Qthernnd ifinther .important objects of "this invention will betonte apparent from the distinsnres in the sneeifiontion A,nnd .the eeoomnnnyine drnwihss- This invention i. @n n preferred fonn) is iiinstrated in the drawings and liereinafterwrnorerfnllny desoriioede 0n iheidtswinesi s i lFiinne =1 issn side elevational view of' en nonnrntnsemhodnine.tnenrinoinles of .my invention. with "nnrtsioioken einen' .end ,in ,seetion` figurez .is anrokentonnlnn .viewiof thenpnnreins ,showninlie-lt ,Figline 3 ris lintiemenitty .enlarged sectional viewtnisen snlostnntinilyonline.infillof Fie 1- viifnire tisnnieninreed ,irneinentety seetionnl View taken snbstnntiniiyLon jtheiline IV-IV of Fie-Z- Y Iiigure 5 is a'fragmentary sectional View Lttigen snhstnntinilyon line V-:VofFigf l Figure 6` is yan ,enlarged `fragnl eritary seetiong'gl view ,tnkenlsnbstentislly the iine iii-.YI of 2, with* nnrts inelevntion, illustintmg the ooetineionetntion ,nsgshownonthedlrnwingn' i lhe ,referente (numeral ,l .indientes es n :Whole nsnnportine these for snontntns ,embodying A,the principles vof my ,intention :for lise v in the goatinvghoffprinting rolls andthemlike. *Said support-V ing nose `I .ineindesn neme stnnotnie 2ten wnien isinoiinteda iaoketedtnnk `for eontainingt'a fluid coating composition. nssoeinied lwiththeinolset oftiietnnk .3 forindiostina/ine .level oithewnten, or. otner liqnidwilthin A signe fines 4 "isV the jacket. The jacket may be filled through a spout 6. A wire mesh or perforated sheet metal basket 5 (Fig. 2) is positioned within the tank 3' at one end thereof so that the fluid coating composition is strained when poured into the tank and before. being withdrawn .fromv the tank through'a disehargepipe 1 entering the bottom thereof.

'At one end of the supporting base I, a supportLN or standard 8 is mounted from the framework 2. Said standard 8 carries a pair of spaced bearing blocks 9, in which is journaled a transversely extending driven shaft Ifwhich extendsbeyond the rear bearing, as at II, and is provided with a gear I2. Said shaft I isalso lextendedatI the frontside of the machinek 'beyond the bearing 9 and is provided with a sprocketgear I3 fixed thereto. The shaft I0 forms a part of the driving mechanism that will be described hereinafter.

Y upon trunnions I5 which freely receivethe shaft Vther supportthe beam I8.

I9 so asto permit the frame I4 to be pivotallyV moved about'said shaft asI an axis regardless of the'rotation of said shaft.' A quadrantshaped plate A|6is secured to the front trunnion |5 and is graduated to indicate, bymeans of a pointer |1 securedvin arfront bearing 9, the angle of inclination of'said frame'I4.V

. A longitudinally extending beam I8 is secured atone end to said framel 4 at the rear side thereof and'v partly supported therefrom. Thel other end of said beam is supported by a rod, I 28' which is extensibleufrom a standard |2I. Nuts r|22 serve tol adjust andholdsaid rod in position't'o maintainthe desired inclination of the beam I8; An auxiliary extensible brace |278 serves to fur- Y Said beam I8 may suitably be of angular cross section, with'avertical web portion I9 and a Yright angle fiange portion 20. .A relatively narrow, elongated Yguide Y plate y2A I is secured to the top edge of the vertical web I9 for the full length thereof. A trough 22 issupported from the fiange 20 and is ofmsuch length as to terminate at its-lower'en'd 23 directly above the tank 3. v y

A bracket 24 is slidably mounted upon the guide plate 2| and may be secured in adjusted position therealong by means ,ofl Va set'scr'ew 25. Said bracket 24 is'profvided with an extension 26r which projects into the troughf22 and carries 'on its extended end a pair of small rollers 21.

rollers 21 provide a roller cradle to rotatably support oneY endpf the shaft f2s of a m11 2a tov be coated. y Movement .of the bracket 24 along the Vguidefplatef'ZI permits the rollers toY be posiu engaging the lower end 33 of said printingv Vroll "'A` spring lpressed-clutch member, indicated shaft. The lower end of thespindle 3| extends freely through a' bearing housing 34 (Fig. 3) and is threaded, as at 35.. VA guard|29 serves toV prevent the coating fluid from running from the lower Vend ofthe roll shaft down thele'ngthof thespindle 3|. f

Said

on said extended end of the spindle 3| and comprises a disk 31 keyed upon said spindle and a flanged collar or housing 38 adjustably secured on said threaded end 35 by means of a set screw 39. A coiled compression spring 4D is positioned between said collar 38 andthe disk 31 and extends into an annular recess 4| in the outer face of said disk.

The housing 34 is provided with opposed socket bearings for receiving the ends, respectively, of a pair ofv stubshafts 42 and 43, which extend in opposite directions from said housing 34 and are journaled, respectively, in bearings 44 and -key 41, respectively. A friction faced wheel 48 is mounted 'on' the'shaft 42 and held against relative"rotation'thereon by means of the key 46. .A set-.screw 5|, sunk in the face of said wheel 48, permits axial adjustment of the wheel along said shaft 42.` A similar friction faced wheel 49 is mounted upon the shaft 43 and movable axially of said' shaft into any desired adjusted position while being held'from relative rotation by the key 41 and in adjusted position by a set screwA l52. The spring'40 of the clutch member 36'normally holds the disk 31 in driving contact withl both of the'wheels 48 Vand 49. As is obvious, the relative rotational speed betwen the wheel 49 vandthe disk 31, and. between the disk 31 and the wheel 48, may be varied vby varying the radial'distances atwhich said wheels 49 and 48 are positioned on their respective shafts 41 and 46. u

.The'shaft42 carries a bevel gear 5|) (Fig. 2) that constantly meshes with a bevel gear 53 `securedto the lower end of a lead screw 54. Said leadlscrew 54 is. journaled at its lower end in spaced bearings 55 carried by the frame I4 and at itsV upper end in a bearing 56 mounted from the web I9 of the beam I8. The threaded portion 51 of said lead screw 54 extends substantially the full lengthV of the trough 22.

'A carriage Y58 (Fig. 4),.s1idably Vmountedupon the guide plate 2|, carries an apertured boss or sleeve 59 for receiving a rod 60, on the lower end of which is positioned ka half nut 6I that is threaded to cooperate with the threaded portion 51 yofthe lead screw 54. 'The upper end of the rod 66'is provided with a collar 62 secured thereto and having a camshaped projection 63 that cooperates with the'boss 59-to permit the half nut 6| to be raised from engagement with the screw 51 or to be lowered into engagement therewith.

The carriage 58 .has a post 64 extending therefrom which visprovided with a socket 65 forreceiving a rod '66. A set screw 61 serves tosecureone end of said rod66 in the socket 65. A clamp 68 is mounted on'the free 'end of the rod 66 for adjustably receiving a feed pipe 69. The bracket or clamp 68 may be secured 'in adjusted position alongth'e rod 66 by means of a thumb screw 18. Likewise, the length ofpipe 69 4may be adjusted .within the clamp 68 by loosening the nut' 1'|f and held Sin adjusted'position by tighteningsaid nut (Fig. 1).v A handle 12 is provided upon the clamp 68 to facilitate its manipulation. The carriage 58 carries a splash guard 13 that extends inside of the trough 22 (Fig. 4) to protect the thread 51' of the lead screw from theV coatingv material during the coating a 'whole bythe reference numeral 36, is mounted nozzle 14 that terminates inslightly spaced reandere lation to :the surface of .the roll 29 `.that :is being coated. The adjustment already described, fin;- oluding the isocket post 64,set-screw6i1rod 66, set screw 1B, clamp68 and nut 1|, permit .the-position of the Vnozzle l11| -ito be adjusted with re ly, and also with respect tothedistanceof itsxdischarge orifice from the surface fofesaid roll.' :Gr-

A dinarily, itis satisfactoryfto position-the nozzle i1 il so that it `lies .above `the center iline of the `:roll 29 and along a radius thereof,ibut thefnozzle 11 may be positioned 4laterally either '.behind or in front of thecenter line'oi' the Iroll and `at anian gle to a `radius thereof .if-desired. *It -shouldibe noted that the nozzle v14 is smoothly tapered so as to provide asolid columnof `fluid coatingcomposition substantially `free from air bubbles. 'Ihe discharge orifice of the -nozzle 1'4 rmay ibeieither circular or elongated rectangular infcrosssection;

The feed connections -to the nozzle '1 4 :include a flexible hoseor conduit 'l5 which is 'supported intermediate Vits endsin an eye 16 carried by'a standard 11. The standard 11 may be supported from a motor base .18. Said hose 'J5 isconnectedto .an upright pipe 19 which Jisusupported by standards 28|). A fthree vWayvalve V;8'| (rFig. il) is inserted Ain the pipe .line '.19 for controlling the flow of coating material to -the nozzle x14; :One of the passages of the -ithree way .valve 8l-isochnected by means vof `an.o.verflow -pipe 82 back to the tank i3. A continuationof the pipe19 leads to thedischarge sideof afpump83`. Theipipe :1, already referred to, leads from the bottomof `the tank 3 yto the intake side ofsaid piunp `83.v

A motor 85, mounted onsaidhase '16,.provides the` source fof'ipower for driving the pump 83 Y and also for rotating the ,rollg29 andimovingthe fili carriage 58. An electricalconduit 86 leads from said motor to a .panel &1 mounted ffrom fthe standards 80. `Aswitch `ii on said panel 81.con trols `the operationoffthemotor :,85; ci[he.-,drive shaft 89 (Fig. 2) of said motor 'B5 is :connected through a coupling 91|, to a countershaft 9|. Thev pump Ashaft 94 .is similarly .connected `by f means of `a ,coupling 95 kto a :countershaft 96.

Speed reducing .gears .within a-housingf93 provide adrive connection between theshafts 3| :and 39.6; Theshaft 96 alsocarries on its extended fend `a gear V.99 for meshing .with vrthe gear `|2 v:on the extended end `|1| rof the shaft il0. Thesprocket gear I3 on Vthe otherfend of .said shaft VIll isconnected :by .means of fachan 4Hill toa Vsprocket gear :I8 securedfongthe vend. of :the stub shaft 43. Itris thus apparent that .when the .motor 851s energized, the .pump .shaft 94 will .be vdriven through fthe reducing ygears connecting ,the stub shafts 9|.-andz96. .'Iheshaft I0 willalsobe driven :.through'theigear 99 lon the stub shaft V9B and the gear |2 on said shaft .|.|l. vSaid :shaft l0 drives the stub shaft -43 through the sprocket gears |3 and 10| and chain |80. The drive is transmitted from the stub shaft -43 through `:the friction wheel `49 to the Vdisk `31, `Which-is spring pressed thereagainst. :Rotation of said disk `;31 effects the drivingofithespindle 3| Y and through the chuck connection 321, thef-rotation of the roll 29. Obviously, thespeed :of rotationof said `roll 29 can `be varied byzvaryingfthe position .of the friction wheel 49 relative totheaxisiof the disk 31, so that the rollq29 mayibedriven at ,the desired, substantially .constant surface :speed irrespective of therolldiameter. i f

i The `drive of lthe disk 31 is itransmittedito the lead screw through vthe friction wheel .48, stub shafts42 :and1bevelgears 5 2 and1i53. '.fIhe.:sp.eed

of rotationiof fthe'lead screw` =54 can zbe-,variedpas rpreviously explained,` :by adjusting the I'position .of

vthat :is-controlled in accordance `.with the thickness of .the roll coating desired.` Ordinarily, however, it .will1be unnecessary to change thefspeedof the lead screw, since for ordinary ',thicknees .ofcoating, it is sucient to vary `the angle .of the `axis of the .roll being fcoated. After the carriage, -58 hasreached the extreme lower end of its travel during vthe feedingoperation, the half fnut ,BI may beraised from cooperation with `the glead screwz51 `by :the operationofthe cam shaped Acollar 62 so as to move the ,carriage 5 8 .back ;to the upper endlof .its travel. x

In operation, the rcllsupporting members rare adjusted to .the proper inclination by means of the threaded rod |2lland nuts |22. V-The angle ofinclination can be readvdirectly on iihequadrant plate |6. The motor -isfthrowninandathe members :of the :friction clutch adjusted `soas to .give a predetermined `peripheral speed `to the roll tobecoated. The nozzle 14is vthen adjusted soasfto direct a solid stream of thecoating Vfluid against .thesurface of theroll, starting at the extreme upper end thereof. 'I-'hehalfnut 6| is released intocooperation with the vthreads 51 of the vleadscrew tostartthetravel of thecarriage 58 down along the guide -plate 2|. After-.asingle passage of the nozzle for the full length ofthe roll, the nozzle is moved away y,fromithe roll -to discharge into the trough. `The chuck 32 is then released from the end of the roll shaftand the roll manually removedandstood upright `on the end that was formerly in the chuck l32.

The coating step is best illustrated fFig.16. The coating ,material ,is discljiarged from the nozzle 14 in a solid stream |23, which fspreads out rapidly to form a film or layer il24. The force of the Stream and `gravity cause thelayer to extend ahead of the nozzle, as at i|25,:to form a Well dened annular wall |26, ywhich advances at the same rate as the nozzle. The coating does not floodithe roll29-inethe sensefthatit doesnot run unrestrainedly lengthwise tof the-roll. A large excess of coating material is,fhowever discharged onto the roll and this excess flows from the underside of the roll in a stream |21, from behind the advancing wall, and into-theftrough 2.2. Thence, the excess flows back into the tank 3 and is strained and-recirculated.

Thecoatingmaterial sets so rapidlythatthere is noldrainageof `surplus coating :material from the roll after it hasbeen removed from'the coating machine. rotate in the machine for a minute or twoaiter the coating stepfis completed, it may then-be supported in horizontal rather than vertical positionrand no flowing of the .coating 4material 4will take place. The surface of the coated roll -is smooth andfglossy and needs no Afurther finishing treatment but :is `ready forv immediate use -as soon as the coating composition hascompletely set. 1

Theicoating .composition itself does not form a part of :the present invention, since it4 is intended to` use a Vstandard coating composition on Imachines of the type described. The -usual printing rollY composition is made uplargely of gelatin or glue `with ;a suitablevsofteningtagent such as glycerine.

.In f order Ltofmaintain La substantially cpnsltant In fact, if the .roll be Aallowed to Y Y |06 by wires passing througha conduit .|08 .and

a flexible'conduitV |00 leading from vthe thermostat `.|06 thereto. A- thermometer .H0 is positioned with itsY thermo sensitiveend directly in the pipe'19 so as to give an exact indication of the temperatureof the coating uid beingdelivered to the nozzle 14. Preferably, a temperature of-about 145 F. is maintained. Y

In order to eliminate asmany variables in the coating operation as possible, it isipreferable-to maintain Va substantially.y constant peripheral speed ofthe roll to be coatedregardlcss of its diameter.' The rate of travel of the nozzle carrier mayl also be kept substantially constant for.; ordinary operation, although itis advantageous to be able to vary the speed of travel of .the nozzle under special circumstances, as where an unusually thick or unusuallythinl coating is desired. As has already been explained, the provision .of a variable speedfriction drive connectionbetween thevdriving motor and the roll and between the driving motor and the lead-screw makes possible theY obtaining of substantially uniform Vperipheral speeds for different diameters of printing rolls to becoated.HVV

' The following table will indicate the'imanner infwhch the' thickness of coatings may be Varied by varying theangular inclination of the roll,

YWhile maintaining the surface` speed of the lrolls substantially constantz' Temperature of coating liquid: 145 F.

Speed of nozzle carrier: 13 per minute. f Viscosity of coating material same for all rollers. Y It will be noted from the above table that th thickness of viilm does not vary more than .001" on the coated rollers, xdespite the variation in diameters of the rollers of from 4 to 5". The'importance of being able to regulate the conditions f operation as closely'. as the'abover table indicates and to eliminate'the variables heretofore presenty in coating operations of this type is obvious. It should also be noted that in order to obtain coating films of widely varyingV thickness,

Yit is very important that the machine be. capable of supporting the roll tobe coated at widely varyingV inclinations'. Although a difference of only 15 of angular inclination is shown in the above table, the machine is capable ofv supporting the roll to be coated in any angular position fromY the horizontal to about a 45 angle from* the. horizontal. This is an important feature that Vwas not present,to the best of my knowledge, in previous machines for coating printing frollsn- The ability to obtain uniform, relativelythick oatings in vone operation' .by the use of my machine is .especially4 important .inA connection with the coating of printer-s rollers for use in color Work. Ingthat casea suiciently thick coating is vapplied'l to permit relatively -narrow annular sections 'of coating to be removed at properly spaced intervals along-the roll and thus provide separate inking sections, to Whichmay be applied differently coloredfinksawithout danger of the inks -intermingling in Ythe'printing operation. It is preferable in'removing the annular-sections of coating not to cut completely through the coating but only to a depth of,.say, to 1/8". Other- Wisepit would be necessary to seal the joint between thef coatingV and the roll base to prevent the seepage of inks between the coating and base. .I' amfaware that many changes may be made andinumerous detailsof construction may be varied through a Wide yrange Without departing from the principles of this invention, and I, therefore,;.do notv purpose limiting-the patent granted hereon otherwise than necessitated by the prior art.V

1 clan-nas my invention:

, ,1. YApparatus for coating printing rolls and the like, to a predetermined thickness of coating that may be'variedas required, comprising a guiding and supporting member, a driven shaft supporting one end of said member'for pivotal movement thereabout, means for adjustably supporting the other end of said. member to vary thei angular inclination ofv said.member, means carried by said member for rotatably supporting a roll, a trough. secured toi-said member, a coating fluid nozzle, :a carriage therefor movably mounted on said member and guided thereby, a receptacle beneath said trough, means connected to said troughand to said nozzle for supplying a coating ilu'idto said. nozzle and means connected to said shaft -for rotating said roll and forV moving said carriage axially thereof on said guiding and supporting member.

'2. Apparat-us. for coating printing rolls and the like to a predetermined thickness of coating that may be varied as required, comprising a guiding and supporting member, a driven shaft supporting ione end: ofsaid member for pivotal movement thereabout, means for adjustably supporting the other end of said member to vary the angularinclination of said member, means carried by said member'ffor rotatably supporting a roll,"a` trough secured to said member, a coating uidlno'zzle, a carriage therefor movably mounted on'said member and guided thereby, a receptacle beneath saidtrough, means connected to said receptacle andto said nozzle for supplying a coating iluid to said nozzle and means connected to said shaft and having a variable speed friction drive connection withsaid roll and with said nozzle carriage for rotating said roll and for moving said carriage` axiallythereof on said guiding and supporting member. V

3.' Inapparatus for coating printing rolls and the like toV a predetermined thickness of coating thatmay be varied as* required/a stationary support, a driven shaft journaled thereon, a roll supporting member supported at one end upon said shaft for pivotal adjustment thereabout, means adjustably supporting the other end of said 'member' atvariable heights to vary the anguiar inclination .of said member and roll, roll rotating means carried by. said member for releasable conn'ectionto'an` end ofsaid roll and meansf'op'eratively connecting said vdriven shaft andsaidmroll vrotating means independently of the angular inclination of said roll supporting member.

4. Apparatus for coating printing rolls and the like to a predetermined thickness of coating that may be varied as required, comprising a Iguiding and supporting member, a driven shaft supporting one end of said member for pivotal movement thereabout, means for adjustably supporting the other end of said member to vary the angular inclination of said member, means carried by said member for rotatably supporting a roll, a trough secured to said member, a coating fluid nozzle, a carriage therefor movably mounted on said member and gui-ded thereby, a receptacle beneath said trough, means connected to said receptacle and to said nozzle for supplying a coating fluid to said nozzle and means connected to said shaft and having a variable speed friction drive connection With said roll for rotating said roll.

5. In apparatus for coating printing rolls and the like to a predetermined thickness of coating that may be varied as required, a stationary support, a driven shaft journaled thereon, a roll supporting member supported at one end upon said shaft for pivotal adjustment thereabout, means adjustably supporting the other end of said member at variable heights to vary the angular inclination of said member and roll, roll rotating means carried by said member for releasable connection to an end of said roll, a nozzle carriage movable lengthwise of said roll, a nozzle adjustably carried by said carriage for positioning in predetermined spaced relation to the periphery of said roll, means for supplying a coating iiuid to said nozzle and means operatively connecting said driven shaft and said roll rotating means independently of the angular inclination of said roll supporting member.

CHARLES F. SMITH.