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_ Juiyl?, 1946. ' G. 1.. ‘SHERWOOD, 2,404,000 COATING MACHINE AND METHOD OF‘COA‘I'ING Flled July 24, 1940 5 Sheet§~$heet 1 ‘ wENmR I 0 f .I ~ 221/ 'k Juiy 16, 1946. G. L. SHERWOOD 2,404,000 COATING MACHJENE AND METHOD OF ‘COATING 5 Shee’Ls-Sheet 2 Filed July 24, 1940 . Hl/IK-iqmn Hu I TI1|.», . t ma > , INVENTOR Zéam??erwm Eu?y 13,6, 39%» , ' a‘ a... SHERWQOD ‘2,404,000 COATING MACHINE AND METHOD OF COATING Filed July 24, I940 _ 5 Sheets-Sheet 3 [III] .Ill " @ | | Hill:| M II INVENTOR. July 16;, 39¢” O a L SHERWQQQ 2,404,000 COATING MACHINE AND METHOD OF COATING Filed July 24, 1940 5 Sheets-Sheet 4 40 .21 1NVENTOR. 11$? iw?g ' G. L. SHERWOOD ' 2,404,000 COATING MACHINE AND METHOD OF COATING’ ' Filed July 24, 1940 .5 Sheets-Sheet 5 \\ QLHa INVENTOR. 2,404,000 Patented July 16, .1946 ‘UNITED .‘STAT‘El-S PATENT OFFICE. COATING MACHINE AND -METHOD OF COATING Glenn L. Sherwood, 'Benton Harbor, "Mich, as signo‘r ‘to Kaywood‘ Corporation, Benton‘ Harbor, Mich.,' aiico'rporation of Michigan Application July 24, 1940,iseria1INo.1347.i35 I iiolaiins. 1 .2 “ This ‘invention relates v'to coating machinery are 'wound as‘they'coine from the drying ‘ovenof and’more particularly‘to machinery of this" kind for coating ,aistrippr ribbon of 'inaterial, such the s'aid‘machine' or apparatus. as ‘metalffor .use afterward in the construction or manufacture of any desired Structure or ar ticle of commerce.’ , 7 ‘Generally stated, the object of ‘the invention 7 ofwhich latter rotate in'bearin'gs 3 of 'any suit able “character. ‘The thin steel strips or ribbons is to .provide an improved machine and an im proved method ‘for use ‘in, the manufacture of Venétian‘blinds orsiiriilar things, and to‘ provide H a machine and method ‘(for this purpose‘that will substantially or‘materiallyreduce the cost of pro duction of ‘the Venetian blinds "or other things, ing oven 8, which latter is disposed vertically in a vertical transverse plane and is of sui?icent height ‘to ins'ure’the desired drying or .baking of the enamel or paint on'the strips. ‘The coated slats from which the blinds or other things are M ‘ V ‘I ‘ _' 4 are ‘carried on these reels and are pulled down wardly from said reels through the enamel or paint-Erin the container 6 and around the idlers ‘1 ‘a’n'd‘then upwardly through the drying orlbak by simplifying and expediting the coating of the made. , Fig. 3101s? a vertical ‘ fragmentary ‘section on'line l‘ll-"l 0 in‘Fig. 2 of the drawings. ‘As thus illustrated, a plurality ‘of reels 1 is mounted'on'a' singlehori‘zontal‘shaft 2, the ends ‘ and partially dried strips then move over ‘the idlers .9 mounted at the ‘top-of ‘the machine or apparatus and ‘are then pulled downwardly m'e'thod'for coating a strip or ribbon of ‘cold rolled steel with enamel or similar material, or with 20 around the'i'dler Ill and then vertically downward inthe oven 8 until they ‘travel around the driving paint of any desired‘character, in such alman "More speci?cally iconsidered, the object of the invention isi'toprovide an improved machine and ner'that the enamelhor otherliquid material will dry smoothly and effectively on the-‘surface of the steelstrip or ribbon, sci-that the latter may roll 'Il onthe horizontal shaft [2, which latter is'the main driving shaft of the machine. “By slats or. Venetian‘ blinds-or-other things. move‘outside of the oven 8 for a distance before details ‘and. ‘teatures of construction and “com binationsitendi'ng to increase the general eii‘iciency then pass under the rolls H and are woundon a looking ‘at Figs. 1 and 3, it will be seenvrthat the then becut‘into lengthssuitable-for ‘use as ‘the 25 downwardly moving coated portions of the strips engaging the driving rolls I ‘I, and-the coated strips It is also an object to provide certainlinove'l - and desirability of an apparatus and method'of this particular-character. W l _ multiple spool rotating about an axis I3 which 30 H 'To the ;foregoing and other useful ends, the invention consists in matters hereinafterset forth and claimed and shown in the accompanying drawings, in which— Fig. 1 ‘is a side elevation of amachine pr vap paratus embodying the principles-of the inven tion, showing vcertain‘ portions ‘thereof ‘broken away for convenience ofilluStration. 'Fig. 2'is a rear elevation ofthe structure-shown ~ in'v'Fi’g. 1 of the drawings. _} ‘ ‘ _ rotates ‘about a horizontal axis and is driven from-the shaft [2 previously mentioned, so that in this way the strips are pulled ‘through the machine or apparatus and are then individually ‘wound tight in the circumferential grooves or spaces of the spool, as indicated more clearly'in Figs. 9 and 10 of the drawings. _ 'lfhatis thegeneral plan of the apparatus and method employed, -~and the ‘best results are ob tained, it is found, when the oven heat'isma-in tained at a-temperature anywhere from two hun died and seventy -_to three hundred degrees Fig.3 =is~a vertical sectional view onv-l-in‘e 3e-3 in'FigLZ of the drawings, on a larger scale. 'Fig. 4‘is a vertical‘section of a. portion of the apparatus on line "4--4 ‘in Fig. 3 of the drawings. Fahrenheit, so that the strips orrlbbons remain approximately one-half an hour in the oven. There is approximately eight hundred ‘feet of Fig. 5 is an enlargedsectional view on-iline 5-5 preferably requires about eight hours to run ‘a reel of the cold ‘rolled sheet steel ‘through the i'n'jFig?2 of the drawings. 1 I A ‘ strip or ribbon on the reel-l, preferably, ‘and it “Fig.6 is a lperspectiveof the twoportions of machine, so that it will ?nally emerge very the device shown in Fig. 5 of the drawings. N Fig. 7 is an enlargedhorizontalsectionon line ' smoothly and very satisfactorily coated with the 'I-‘Tin‘Fig. 5 ofthe drawings. V ‘ Fig. 8 'is a'vertical section on'line 8-8 in ‘Fig. enamel or paint or ‘any other liquid material. Preferably, of course, 50 that a plurality of'strips or ribbons can :be 'run through the machine at the same time, and ‘coated in di?erent colors, there'are as many containers B-as there'are-strips. Fig. )9 is ‘a perspective of the reels .or lspools uponwliich'the coated strips or ribbons of steel 55 to‘be coated, with a di?erent color of paint or 7 ofthe drawings. ’ H ‘ , 2,404,000 Ii 4 enamel in each container. These enamel con tainers are set in a water tank 14, and the water is preferably maintained at a temperature of about one hundred and twenty degrees, so that the paint or enamel will have that temperature 5 while the strips or ribbons are passing through. After the strips or ribbons come off the reel l, tween which the tape or ribbon moves upwardly, it being observed that the plate 34 is fastened to the side walls of the paint or enamel container. The plate 35 is subject to the action of the spring or springs 36, through the medium of levers 31, so that the ?at strip of metal is momentarily made trough-shaped, as shown at 38 in Fig. '7 they pass through a brake device comprising rolls of the drawings. _ In other words, it becomes par [5 driven at a lower rate of speed than the tape tially tubular, and anything tubular, or partially or ribbon is moving, and the strips or ribbons are 10 so, is much stiffer and more rigid than a sheet or held against these rolls by the felt brake device l6 which is controlled by the tension spring or springs H, and at this juncture it will also be strip of metal in perfectly ?at form. In other words, the plate 34 is concave, and the plate 35 is - convex, in horizontal cross-section, and this observed that the reel I is governed by a band means that the strip or ribbon becomes momen brake 13 which is under the tension of the spring 15 tarily shaped like a shallow trough in cross-sec or springs i9, shown in Fig.‘ 3 of the drawings. tion, and in that way it gains rigidity enough to Everything is preferably driven from the shaft prevent vibration thereof. I2 previously described, in the manner indicated - Moving at a comparatively slow rate of speed, in Fig. 1 of the drawings, and this shaft is pref- ~ theascending portions of the tape or ribbons are, erably driven by an electric motor 29 through a 9.0 in effect, wiped and freed of surplus paint or reducing gear 2 i of any suitable character, enamel at the surface of the body of liquid in whereby the said driven elements of the machine will each be given the predetermined speed nec essary or desirable for doing the work in the re quired manner. each container. In this way, there is'noidown ward flow of the enamel or paint on the ascend ing portions of the ribbons, and the liquid is 25 dried and baked in very smooth condition on each Rolls 22'under the control of the springs 23 ribbon. . press the coated and dried ribbons against the It has been found that when the tape or rib under Sides of the roll H, as shown in Fig. 3 of bons move about eighteen inches a minute, good the drawings, and while this is su?icient to pull results have been obtained, and good results have the tapes or ribbons through the machine, it will 30 been obtained with cold rolled steel two inches be seen that the spool or reel 13 is also driven by wide and about eight-one-thousandths of an inch the roller 24 which is belt-driven from the shaft in thickness. Each strip or ribbon is about one l2 previously mentioned. minute in the paint bath, preferably, although “ A heater 25, of any suitable character, is pro this would probably change or vary for different vided to furnish heated air to the oven, and this 35 kinds of enamel or paint or other liquid, and is preferably accomplished by using a vertical air the same is true of the time required in the dry jacket 25 around the smoke~pipe 27, which latter ing and baking oven. The proportions and the may carry off the products of combustion from general height of the machine or apparatus the heater, assuming that oil or gas or fuel of "should be, therefore, such‘ as to insure the above some kind is burned in the said heater'to pro 40 figures. ' vide the required heat. The heated air in the a With the apparatus and method as shown and jacket 26 is discharged through pipes 28 into the described, the coating of the tape or ribbon is upper portion of the heater, and the motor such that they can‘ be permanently pressed into driven fan 29 then sucks the heated air down trough-shape, to make them rigid, ‘as in the wardly and through the pipe 36, where it is then case of slats for Venetian blinds, and while the discharged back into the said heater. Of course, metal is thin-and'comparatively light, the slats some fresh air enters the bottom of the heater for blinds made in this way are surprisingly strong at 3| to compensate for losses. ‘ and rigid. The forming of the strips or ribbons Thus, looking at Fig. 1 of the drawings, it will of metal in-this way, by converting each one into lie-seen that the coated tape or ribbons travel a Ni a shallow trough, is done without correcting or in distance in the atmosphereoutside of the oven, any way damaging the dried, baked enamel or after leaving the rollers 9, and then travel down paint thereon. It thus becomes possible to make "wardly inside of the heater, and then outside of the coating step of the process a practically ‘con the latter before reaching the driven rollers H, tinuous one, as the coating is done on relatively for it is found that in this way the enamel or 55 long strips instead of on short ones. paint or other material is more satisfactorily Obviously, there is considerable room or lat dried and hardened; itude for changes in the construction of the ap Paintis supplied to the different containers 6 paratus shown and described, without going out in any suitable or desired manner, as by simply side the scope and‘spirit of the invention. For pouring it in by hand, and each container is pref example, long rollers might be used as a substitute erably provided with a baiiie 32 to prevent the rip for some of the sets of individual rollers. Pref ple from reaching the strips or ribbons of metal erably, the apparatus is substantially or practi or other suitable material. cally vertical, so that the tape or ribbons travel Preferably, the multiple spool may be lifted upwardly and then downwardly. This makes for vout whenbit becomes entirely loaded with the 65 a practically minimum amount of ?oor space coated strips or ribbons of metal, so that the said necessary for the machine or apparatus, but it is strips may then be removed and cut into sec conceivable that the tape or ribbons could be tions of desired length for Venetian blind slats, or made to travel horizontally instead of vertically, for other purposes. by using _a different relative arrangement of the In'actual'practice, of course, it becomes desir 70 elements of the machine or apparatus. able to keep the tape or ribbons from vibrating "as. they emerge and rise out of the paint or enamel in the containers. This can be done in any suitable or desired manner, as for example, .byproviding a couple of plates 34 and 35, be An important thing to observe is that while the coating is done by a dipping process, it is true that the motion of the article or thing‘being dipped is never reversed in the paint bath, as it 75 travels through the latter by continuous motion ‘2,404,000 6 and without-any. interruption or reversal thereof. ~theobjeot to be‘coated travels'continu .used for curving the ‘dry/coated: material ‘trans versely, so :that his slightlyitrougheshaped ‘in .ously. in: one .direction ‘and it ‘rises ‘so slowly outzof cross :section, and that any’ suitable means can be thepaint or enamelbath,*that the liquid. is spread evenlyanduniformly in a thin ?lmover thesur employed for cutting the strips into lengths suit ablefor'the Venetian‘blinds, and that this cut faces .of'the metalror other'material, and this ?lm‘of ‘liquid is not disturbed by anyjoltingor tingoperationican be‘performed before or even jarring or vibration of the 'strip or ribbon 'of in :cross section. after the strip or'ribbon is'permanently curved ' metal, with the result that whenéthe'coatedtape Thus;the;dipping process for coating the sheet .or'strip is ?nally wound on'the .reel 33, the ?lm 10 steel or other suitable material becomes con (of enamel orpaint isperfectly smooth and uni tinuous, in e?ect, ‘instead of'being intermittent formv in‘ thickness, and completely dry. Things of as itwould‘be if .the material was cut intofsuita this'kind can be coated by’spraying the painter blexlengths and :thereafter dipped and ‘coated. enamel on :them, but there are many :diii‘iculties The enamel, paint or iotherlliquid material em and objections involved in .spraying which “are 15 ployedshould’be of 'any well known kind that completely eliminated .or obviated .by a dipping is toughilandi'ipliable,‘ 'when'dried; so that the form process of .theikind ‘ishovmiandsdescribe'd. :‘For ing.'of the strips WillInOt crack or injure the coat example, spraying ' oftnarrow orfsmall articles »or ing .thereon. objects is usually' accompanied by ‘a serious waste The foregoing'isra description of the ‘apparatus of lthewliquidmaterial, whereas with the dipping 20 in "what might :be ‘called its simplestform, as process shown ‘and described, there‘is absolutely suming that the ‘strips Jor‘ribbons are allimovi'ng no vwaste-of the painter enamel. In ‘addition, spraying involves the atomiz'ing of the liquid, and simultaneously, ‘fromfsupplyireels that‘are all‘on ' if ‘the latter contains a idrier of one kind or an a1l1on another shaft. other, the ?ne particles of'the liquid may become too :hard before they strike ‘.the surface 'of the article to be coated. With the ‘multiple reels shown and described, the plurality of strips or ribbons ‘can be coated simultaneously, each with l'Howeven'iin actual‘ practice; it is found :prefer able‘tohave the-supply reels ‘operating separately the storage reels upon'which' thei'coate'd-Istrips or ribbons‘ are‘woun'd’ialso foperatin‘g ~separately and a diiferent color or shade, and thisis possible independently of each‘other, whereby theiamount one ‘shaft, .and ?nally'tofstorage‘reels that are ‘ and independently eof . each ‘other, and to have without :increasing ‘the height of the machine. The tape 'or ribbon is kepttaut ‘and held against of 'windior coiled-up strip or ribbon maybe con siderably differentfonithe ‘different reels or drums, distortiomwith the one exception that it is Imo or on the‘spools‘a's theyimay be‘calle'd. ' mentarily curved in "cross section immediately i-‘For'that purpose,ithere are'then as many sup before .it emerges from the surface of the liquid, ply "reels 1'! as there ‘are stripjsor ribbonsyor’as and this ‘slight ‘momentary distortion tends to there are'p'aint or enamel containers "for‘holcling prevent vibration of the‘strip ‘or ribbon,'~which is theiliquid. A1S0,ifor that purpose, there'are as desirable inasmuch as‘vibration-mi'ght disturb the many .istorage reels or drums 33 as there ‘are ?lmpf'liqui'd‘on the ribbon. But with‘vthe‘flatter strips ‘or ribbons, or as there are liquid containers. held against any vibration, ‘the ?lm is of uni 40 That means that‘ there are as many band'brakesx form thickness and is absolutely stable, so that it It as there are ‘supply reels or drums on'the axis dries 'oribakes in ‘a perfectly ‘smooth condition 2. ‘The separate and independent storage reels and with a glossy surface that is entirely free 33 practically ?oat on the roller 24 and the roller from roughness or unevenness. Therefore, if‘the 39, which latter is merely an idler, the roller '24 strip :or ribbon is ‘run atl‘too high a speed, it will being driven at a higher speed than the feed, in carry vupfan'excess 'of liquid that will then run order to keep the strips or ribbons taut on the back down 'and'streak the surface ‘of the film. reels 33, and this compensates for the di?erence But when the ribbonis' runat such-a slow rate ‘of in‘spee'd of ‘the ‘tape or ribbon when it begi'ns‘to speed ‘that it carries upward no excess‘liquid, a windiup on 'a reel, ‘and its speed when the‘ reel thin'?lm' is insured of uniform thickness‘and with 50 is nearly full. As shown more ‘clearly in ‘Fig.9, no unevenness of the surface thereof. the ‘framing 40 has some transversechannel irons It-will be observed that while thestrip- or rib M and '42 thereon,‘ provided with pins 43 that bon with the ?lm of paint or enamel thereon keep the reels 33 properly separated‘and upright is moving in one ‘direction, the heated air is on the rolls‘2‘4 and '39. In this way, the supply moving, in the voppositedirection, inasmuch as reéls and the ‘storage reels “can be used in'dif the said tape or ribbon moves upwardly in the ferent ways, and one reel ‘can be running a ‘small oven 8, while the heated air in the latter moves job while another reel is running a large job, and downwardly. SIn 'thisway, any given spot on other things can be done, quite obviously, that the strip or ribbonis subjected to steady and could not be done 'if all the supply reels were changing ‘supply of :heated air, during its course rigid'with each other, and if all the storage reels oftravel throughthe oven. In this way, the strip were'rigid with each other. Of course, the‘speed or ribbon encounters the minimum temperature of all‘theistrips or ribbons is maintained at a cer when it enters the lower end of the oven, and tain predetermined degree by the ?xed speed of then encounters the maximum temperature-when the roll I I, and its idler roll 22, which are main it entersthe upper portion of the oven. This, of - tained at a predetermined given speed inorder to course, means the upwardly travelingportion of insure the proper timing of the apparatus, not the tape or ribbon, for while the latter ultimately only as to the timing of thestrips or ribbons in passes-outside of the oven and through the or the bath, but also in the‘ oven. Obviously, there dinary atmosphere, and then downwardly a dis must be no disturbance that would .cause ripple tance within the oven, it will be seen that the in the bath, and thelength of time that the greater course vor distance of travel is upwardly within the oven. ‘If the several strips or. ribbons are being coated to become the slats of Venetian blinds-it is ob Vi'ous that a suitable or desired means can be strips or ribbons are in the oven, orbeing dried and hardened, must be predetermined to insure the. proper drying andahardening of the. thin?lm of liquid material 'on .the ‘strips or ribbons. _:It 75 will alsobeseenthat there are preferably as many 2,404,000 7 8 springs 23, and spring-pressed rollers 22, as there travel of said metal ribbon, through which slot the metal ribbon passes, the said means having the arcuate slot therein being located within said container for the coating composition a short distance below the upper surface of the coating composition in said container whereby the coated metal ribbon has a temporary arcuate form transversely of its length as it leaves the body of are ribbons or strips to be coated, for it is better to have the feeding grip individual for each strip or ribbon, for in that way there is compensation for any difference in thickness as between the strips or ribbons, and the machine may be work ingssimultaneously on both relatively thick and relatively thin strips or ribbons, and at this junc coating composition. ture it is to be observed that there are as many friction brakes I6 as there are rolls 15, in the 10 4. An apparatus as described in claim 3 fur preferred form of the apparatus. Of course, the timing and temperatures men~ tioned are merely those that have been found to be proper for a, particular enamel which has been used for coating the strips. Of course, some 15 enamel is baked at a temperature as high as six ‘hundred degrees Fahrenheit, and all the other conditions depend more or less on the type of material used, for some enamels or paints dry ther characterized in that the arcuate slot is formed between a pair of members having coop erating arcuate surfaces, one of said members being ?xed and the other being yieldably pressed against said ?xed member with sufiicient force to give said coated metal ribbon said temporary arcuate form transversely of its length as it leaves the body of the coating composition. 5. An apparatus for continuously coating a 20 metal ribbon with a liquid coating composition and bake quickly while others require more time, and hence the distance of travel and the tem perature of the elements and other factors of that kind will vary according to the type of mate rial used. The invention, therefore, is not limited to any particular temperature or timing or length 25 which comprises a container for the liquid coat ing composition, means for passing the metal rib bon through the liquid in said container at a slow even speed, whereby to uniformly coat the metal ribbon with a thin smooth ?lm of the coating composition, said means for passing the metal of travel, as that will vary more or less in accord ance with different conditions. What I claim as my invention: ribbon including a roller driven at a slow even guide means associated with said oven for mov-' under tension. ing the coated ribbon from the container for the coating composition upwardly through the oven, 6. An apparatus for continuously coating a metal ribbon with a liquid. coating composition which comprises ‘a container for the liquid coat ing composition, means for guiding the metal rib bon into and out of the liquid in the container at a slow even speed, whereby to uniformly coat the metal ribbon with a thin smooth ?lm of the coat ing composition and means for preventingvibra tion of the coated metal ribbon as it leaves the body'of liquid coating composition in said con tainer including means having a slot therein which slot is arcuate transversely of the line of travel of said metal ribbon, through which slot the metal ribbon passes, the said means having the arcuate slot therein being located adjacent the upper surface of the coating composition in said container whereby the coated metal ribbon has a temporary arcuate form transversely of its length as it leaves the body ‘of coating composi speed engaging the metal ribbon after the coat ing is applied and drawing the metal ribbon 1. An apparatus for continuously coating a metal ribbon with a liquid coating composition 30 through the coating bath at said slow even speed and said means for passing the metal ribbon also which comprises a container for the liquid coat including a supply reel and a second driven roller ing composition, the largest dimension of which having a uniform peripheral speed slightly less container is many timesesmaller than the length than that of said’ ?rstnamed roller and posi of the metal ribbon, means for continuously guid tioned at a place in the path of travel of said ingv the metal ribbon into and out of, the liquid metal ribbon between said supply reel and said in the container at a slow even speed whereby containerLthe metal ribbon being maintained in to uniformly coat the metal ribbon with a thin engagement with said second driven roller by smooth ?lm of the coating composition and means resiliently urging said metal ribbon against means for continuously drying the ?lm of coating said second driven roller whereby the portion of composition so formed on the metal ribbon, said metal ribbon extending between said second driv drying means including an oven supplied with en roller and said ?rst driven roller is placed heated air moving downwardly therethrough and then for a short distance outside the oven, and do then downwardly again inside the oven and then again out of the oven by a movement laterally therefrom at a point located a substantial dis tance above the lower end of the oven. 2. An apparatus for continuously coating a 50 metal ribbon with a liquid coating composition which comprises a container for the liquid coat ing composition, means for guiding the metal ribbon into and out of the liquid in the container at a slow even speed, whereby to uniformly coat the metal ribbon with a thin smooth ?lm of the coating composition, and means located adjacent the surface of said liquid in said container for providing the ribbon with an arcuate form trans versely of its length as it leaves the body of coat ing composition in said container whereby to pre vent vibration of the coated metal ribbon as it leaves said body. ‘ 3. An apparatus for continuously coating a metal ribbon with a liquid coating composition which comprises a container for the liquid coat ing composition, means for guiding the metal rib bon into and out of the liquid in the container at a slow even speed, whereby to uniformly coat the metal ribbon with a thin smooth ?lm of the coat ing composition, and means for preventing vibra-. tion of the coated metal ribbon as it leaves the body of liquid coating composition in said con tainer including means having a slot therein which slot is arcuate transversely'of the line of GU tion. ‘7. In a method of making short lengths of coated metal ribbon permanently set in an arcu ate form transversely of their length the step which comprises ?rst continuously coating a rela tively long ribbon of the metal before subdividing said metal into lengths and before providing said permanent arcuate set, said coating being applied by continuously guiding the ribbon of the metal into and continuously drawing said ribbon ver tically upwardly out of a body of liquid coating composition in a container at a slow even speed, providing said ribbon with an arcuate form 2,404,000 9 10 transversely'bf its length over a portion of its path of travel extending from a point a substan tial distance within the body of liquid coating therein which slot is arcuate transversely of the line of travel of said metal ribbon, through which slot the metal ribbon passes, the said means hav composition to a point a substantial distance be ing the arcuate slot being located adjacent the upper surface of the coating composition in said container whereby the coated metal ribbon has a temporary arcuate form transversely of its length as it leaves the body of coating composition. yond where said ribbon leaves the ‘body of liquid coating composition and continuously drying the ?lm of coating composition so formed on the long metal ribbon, said coating composition being maintained at uniform temperature and uniform composition during the coating operation. 8. A method for continuously coating a metal ribbon with a liquid coating composition which comprises guiding the metal ribbon into and drawing said ribbon vertically upwardly out of a body of the liquid coating composition at a slow even speed and providing the metal ribbon with 10. A method for continuously coating a metal 10 ribbon with a liquid coating composition which an arcuate form transversely of its length over a portion of its path of travel extending from a point a substantial distance Within the body of liquid coating composition to a point a substan comprises guiding the metal ribbon into and out of a body of liquid coating composition at a slow even speed and providing the metal ribbon with an arcuate form transversely of its length over a portion of its path of travel extending from a point a substantial distance within the body of liquid coating composition to a point a substan tial distance beyond where the metal ribbon leaves the body of coating ‘composition. 11. A method for continuously coating a metal tial distance ‘beyond where the metal ribbon 20 ribbon with a liquid coating composition which leaves the body of liquid coating composition. comprises continuously guiding the metal ribbon 9. An apparatus for continuously coating a into and drawing said ribbon vertically upwardly metal ribbon with a liquid coating composition out of a body of the liquid coating composition which comprises a container for the liquid coat in a ‘container at a slow even speed, providing the ing composition, means for maintaining the coat 25 metal ribbon with an arcuate form transversely ing composition in said container at a uniform temperature throughout the coating operation, of its length over a portion of its path of travel extending from a point a substantial distance within the body of liquid coating composition to tically upwardly out of the liquid in the con a point a substantial distance beyond where the tainer at a slow even speed, whereby to uniformly 30 metal ribbon leaves the body of coating composi coat the metal ribbon with a thin smooth ?lm of tion and continuously drying the ?lm of coating the coating composition and means for prevent composition so formed on the metal ribbon, said ing vibration of the coated metal ribbon as it coating composition being maintained at uniform means for guiding the metal ribbon into and ver leaves the body of liquid coating composition in said container including means having a slot 35 temperature during the coating operation. GLENN L. SHERWOOD.