US2102679A - Coating and stripping device - Google Patents

Description

21, 1931, P: CARLSON 2,102,679

COATING AND STRIPPING DEVICE Filed Oct. 1,1955

INVENTOR. Frank E Carlson ATTORNEY.

,.4o able, relatively soft and 55 by assuring the Patented in... 21, 1937.

UNITED STATES PATENT 1 o'FFIcE' 2,102,679 con-mm ND s-rmrrmc DEVICE Frank I; Carlson, New York. N. Y.

Application October 1, momma.

' This invention relates to coating and stripping devices similar to those shownand described in my co-pending-application, Serial No. 735,556, filed July 17th, 1934, for Coating and stripping,

- and of which the present case is a continuation n part.

The objects of this invention'are to provide a machine whereby sheet work in general, and particularly sheet work .inherent body stiffness, may be coatedwithout the employment of grippers for propelling the work while the coating is applied thereto. Another object of y a machine for coating individual, relatively p able, soft, thin sheets in which the coating operation takes place simultaneously with theproepelling opet'ation of the'work, and in which the work is stripped in respect to the coating means at the moment the coating is being applied, all without the use of grippers. I

Another object of this invention is to provide within such coating device suitably operable work-supporting and work-propelling means, whereby the work is caused to temporarily adhere to, or to be retained by, or to be held and forced against a movable supporting surface, while being coated, for the purpose of stripping and conveying the work during the coating operation without the employment of grippers.

Still another object of this invention is to provide in a coating device, and in connection with a movable work-supporting andwork-propelling means suitable stripping devices for separating the coated work from such work-supporting and propelling means, immediately after the application of a coating to the work. v 4

Another object of this invention is toso con struct and arrange the coating device as to-render it applicable for providing a coating to'plithin sheets in either the form-of strips or upon the entire face or upon parts of its face, at any desired arrangement, and in which" the various coating styles may be achieved by only an insignificant re-setting of the different parts constituting the device. I

A stilifurther objectv of this invention is to provide in connection withthe movable work-attracting, work support means for precisely controlling the traction-producing medium within which .the work support operates. Another object of this invention is to provide variouskin'ds of coating supplying means and g me whereby the work is caused to be forced again t the movable work support, thereadherence of the work against which does not possess an this invention is to providi."

- vice in a purely diagrammatical form,

.' in which operates within 1935, Serial No. 42.996

such work support during the coating operation.

A still further object ofthis invention is to provide in conjunction with a coating device of this kind, guard means extending into the working range-of the movable work support and 5 the coating applyingmeans cooperating there-j with for preventing inadvertent deviation of the coated work from its intended path. 1

The foregoing and a number of other important objects and advantages of the present in-' vention will become more fully apparent from the following description and the accompanying drawing, the latter illustrating the principles and inost important features of the present de-' and which 15 drawing is to serve for explanatory purposes only, and therefore are not intended to limit my invention in any way to the actual showing, and

Fig. 1 is a diagrammatical side elevation of one 20 form of my device, showing the essential parts thereof in one form of their arrangement; 1

Fig. 2 is a partial fi 'ont elevation of my device, in which the feeder portion is left oh and in which therear parts are not illustrated;

Fig. 3 is a diagrammatical side elevation of a similar arrangement to that shown in Fig. l, with some of itsparts disposed in a somewhat different order from that seen in Fig. 1;

Fig. 4 isa side elevation of a modified form my device, shown diagrammaticallm'in which the coating applying means differ in construction from those shown in Figs. 1 and 3; and

Fig. 5 is a side elevation of still another modiflcation in which the coating applying means 35 takes the form of a spray underpressure. Y

Referring now specifically to the Figures 1 and 2, numeral l0 denotes a work support in the form of a roller, which is preferably provided with a hard, highly polished but which may be provided with minute suction cups, if so, desired. This work supporting roller awell or dish I l {partially filled with a quickly, evaporative adhesive l2, such as varnish, glue, or any similar form of tack-pro- 45 ducing substance, The amount of the adhesive medium elevated and applied over the surface of the work supporting roller I0 'is governed by minutely adjustable doctorblade II, which is flexible and which bears against the 'entirelength so of the outer surface of roller its It will, be observed that the blade presses against the surface and is not turned with its edge against the direction of'rotation of roller ill, but on the contrary, glides, so to speak. in

surface, such as chromium, 40 j I supporting roller III is mounted in a roller II, and which is provided at its applying surface with a resilient covering l5, preferably of rubber or the like. This coating applying roller is lodged within an adjustable bearing l5, held in connecting arm l1, which latter is adjustable by means of an adjusting screw l3. At the-upper eccentric i9,

end of adjustable arm l1, there is provided an within which is-lodged at 20 a transfer roller 2|.

Roller 2i cooperates with roller l4, and also -with pick-up roller 22, which is preferably equippedwith a resilient working surface 23. Roller 22 operates within a tank 24, filled with coating 25, which is to be applied to the work. In cooperationwith roller 22, there is a doctor roller 26, 'adjustably lodged at 21. All of the rollers I ll, l4, 2|, 22, and 23 are geared with one another, so that their operation is positive.

It will be observed that roller i3 is offset relative to roller l4, and that feeder 23 is so inclined as to deliver a sheet 29 between the two rollers at practically righ t angles to the center line passing through the bearings of these rollers. -At the right-hand side of work-supporting roller i3, therewill be seen strippers 33, in the form of a -'plurality of sharp fingers; which lightly rest against roller III, andwhich 'areintended to separate work sheet 29 from roller lfl'.

Above roller Hi, there is provided a fingershaped guard 3 I, extending into the range on operation of 'rillers. l9 and I4, and is intended to prevent any accidental back flap of sheet 29, after it haspassed between rollers l and I4.

Adjacent to roller 10, at the left hand side, there is seen a belt conveyor 32, operating with-- in a cover 33, which latter is intended to prevent Y the dissipation of heat emanating from heater 34. Conveyor 32 is directly driven from work F supporting roller ll,,as indicated at 35.

The purpose of roller l3 operating in adhesive medium I2 is to provide the surface of the work supporting roller with a tacky film, controlled by blade 13, which film, when very thin, rapidly point between rollers 13 and l4,'the tackiness of v the surface of roller Ill strips'the work from a material which does not require being stripped ing body stiffness 'requlresn'o 8 11 1 11 8 means,

and coating and stripping of such material' provided suitable apertures,indicated/at". from 75 .off point between rollers, the work is mechanfolding up of the work passing towards con 'veyor 32;

evaporates and increases its tackiness,- whereby the undersurface of the work is caused to adhere to-th'e surfaceof roller I 3. In this manner,'the work is propelled by roller i9, while a coating is applied to the upper, surface'of'the workv by roller l4. I Themoment the work passes the contacting possible adherence to roller i4, thus enabling the work being propelled towards conveyor 32.'

Immediately after having passed the strippingically stripped from'the work supporting roller ll by means of stripper fingers 39. Guard 3i is intended to prevent possible crumpling or It'is to be borne in team that my device is pri marily intended to handle sheets of work hav-j xingno inherent body firmness, as compared with cardboard, tin, fibre, or any other relatively stiff inthe manner described above. Material havplying roller l4 upon being coated, and therefore is shown in Fig.3, in which again a vessel 38 is vbe also observed that above the strippers and beis illustrate'din Fig. 4, in which is again 'shown a vessel 5|, provided with a tack-producing me- 7 However, work in the form, of sheets of pliable, soft materiaiwill naturally'adhere to the ap requires being pried away from the coating roller,

'- which function is accomplished .-by the employ- .ment of the movable support, which attracts the lower surface of the work while propelling it,

and without marring or coating that lower surface.

These results are obtained by the employment of a tack-producing material, which, uponbeing caused to form a thin, uniform surface, readily gives up its volatiles and becomes a relatively dry. adhesive, which will not'transfer to the work, but will remain upon the surface of roller iii.

A similar device for coating and simultaneously stripping work in the above described manner is illustrated containing a. tack-producing me-' dium 36', and in which is rotatably mounted a work-supporting and propelling roller31. The

9 thickness of the coating isagain controlled by a flexible blade 38. Above roller 31, there will be Seen the coatingapplying roller 39, which is offset in relation to roller 31. Above roller 39, is placed transfer roller 43, which also contacts with supply roller 4|, operating within vessel 42, filled with coating material 43. The amount of coating sup-' plied by roller 4| is governed by doctor roller 44.

In front of work-supportingroller 31 is again seen a feeder 45, which delivers sheets between rollers 31 and 39. At the left of roller 31 isagain provided a series of stripper fingers 46, and adjacent to these fingers is an intermediate conveyor 41, cooperating with conveyor 43, the latter corresponding to conveyor '32 ofFigLl. It will tween a series of rollers 39, there is provided again a guard 49, for preventing the sheet from flapping over' or crumpling after it was stripped from rollers 31 and 39. v

The difference between the construction shown in Fig. 3 and that illustrated in Fig. 1, is that in, Fig. 3 the coating material elevated by roller-4| is transferred to roller 40, and is brought over to applying roller 39 in a just. opposite relation to that shown in Fig. 1.- Consequently, there is formed a puddle 59, between rollers 43 and 39, which'puddle may be regulated as to its size by adjusting roller 49 against roller 39. This puddle amount of j coating material upon roller 39, which is of rather serious importance. In Fig. 1 the puddle is not readily seen, although it is also formed, but due to its invisibility, its control is rather difficult.

" A'more simplified form of my coating device dium 52, in which operates a' work-supporting roller 53, .and with which cooperates a governing blade 54, which controls the thickness of the film 65 of thetack'produclng medium elevated by roller 53. In cooperation with the latter roller, there will be. seena coating applying roller above which roller is shown a controlling or doctor roller.

5s. Th coating material is delivered from closed 7o vessel 51 through one' 'or more pipes, which 4 pipes terminateabove roller or rollers 55.-

- The coating material is formed'intoia mist or 'spray'by means of an air jacket 59, in which are the usual work .ducing medium 65, in which which air, under-pressure, bears against the flow of the coating material issuing from tip ofpipe or pipes 58. Between rollers 55 and I, there is again shownthe formation 'ofa puddle .Si, for of coating to be applied To the right of rollers feeder 62, while at the; left is shown the usual series of stripper fingers 03 and the conveyor 64. In this figure, the guard, shown in Figs. '1 and 3, is omitted. Howevenit may be also providedin connection with this construction.

Referring now to .Fig. 5, there is illustrated a vessel 65, which again is filled with a tack-prolatter work support- 'Blade 68 controls the the tack-producing ma- 61. To the right of the roller there is a feeder B9, and at the left, there is seen stripper fingers 10 and conveyor ii. Immediately above roller 1, there is shown a device similar to that illustrated in Fig. .4, and consisting of a closed supply tank 12, filled with coating ing roller 61 operates. thickness of the film of terial elevated by roller material, from which tank. issues one or more pipes 13, which are surrounded at their delivery end with an air jacket 14, through which air pressure is directed by apertures I5, against the flow near the work-supporting of coating material issuing from pipe it.

It will be observed that in this modification, not only the spraying of the coating material is accomplished by the air pressure from jacket It, but at the same time, the position of the Jacket is so terial to be coated is urged against the roller in lieu of an applying roller, such as illustrated in Fig. 4 at 55. In this modified form, is entirely produced by spraying, and lends itself to providing coating upon the work either in the form of stripes, orover the entire sheet, or any part thereof, all depending upon the arrangement and the number ofsprays provided above roller bl. I I s I I In all of theillustrations shown, the coating and stripping operation is'intended for material in sheet form, which is relatively soft and pliable, and which does not. possess inherent body firmness, and would ordinarily require the employment of grippers throughout the coating operation, and it is.the principle of this invention to produce such coating and to strip the work by traction will counteract the adhesive action of partial or full the employment of a movable support, which will sufllciently attract the undersurface of the work to provide not only traction for propelling the work during the coating operation, but which atth coating material.

3 "one of the important features 'of this invention also resides in thefact that such gripperless coating operation lends tinuous procedure, that is to say, that while the device is intended to handle individual sheets, the handling is so rapid that the sheets may be fed in a continuous succession, each other'but by little spaces, or practically abutting with one another, thereby similating the coating of a continuous web, such-as a gummed tape.

It is also to of the devices illustrated may be employed for what is known as strip coating, that is, to provide I one or any number of strips upon the surface of the work to be coated or may be employed for surface coating, as may be desired. lying rollers are Forthis purposa'the coating a a and 55, there is seen continuous and close succession,

shown depends upon a I surface, while coating roller 61, that the madrailring are capable the coating itself to an almost con- 1 either separated from I be borne in mind that either one operation with said I 3 exchangeable and adiustabiereiativeto one another and relative to I In Fig. 2, there is illustrated a series of rollers for strip coating. Their distance may be altered and rollers of different widths maybe employed. By the same token, a solid roller may be employed over the entire width of the work supporting roller, thereby providing coating over the entire surface at the work. The same principle applies to the illustration shown in Figs. 4 and 5.

summarizing, allof the-devices described and illustrated in the forms shown, or in any desired modified arrangement, are'intended for gripperless coating and handling of work consistingof individual, relatively soft and pliable sheets, which do not possess suillcient body firmness to follow unaided throughout the coating operation, and which sheets are intended to be coated in I so as to similate the coating of a continuous web.

Furthermore, the operation of all-of my devicesmovable work support which not only supports, but propels the work during the coating operation, and which also provides for the stripping of the work from a coating applying roller, if such device is employed, such work-supporting roller being so designed as to temporarily attract the undersuriace of the work successively at all points of the work, without coating or marring such underis supplied to the opposite face of the work at the points where and while the work is being attracted by the work-supporting roller.

Obviously, the difierent structures shown in the demands'such modification, for myself the right to work to be handled and I therefore reserve make changes and improvements in my invention as may become necessary, without departing from the broad scope thereof, as set forth in the annexed claims- I claim: a

1. In a gripperless coating device for handling work in the form of individual sheets of relatively soft, pliable material, possessing little or no inherent bodyflrmness, and which sheets are to be coated in a continuous, close succession, so as to similate the coating of a continuous web, movable work supporting and propelling means, provided with a work engaging, tacky surface film designed, while said means are in motion, to temporarilyattract and release, successively, all points of one face of the work. lying between its two ends, without coating or marring that one work surface, and means in cooperation with-gsaid propelling means for simultaneously coating the opposite face of the thus 2.111 a gripperless coating device for handling work in the form of individual sheets of relatively soft,pliable material, possessing little orno inherent body firmness, and which sheets are to be coated in a continuous, close succession, so as to similate the coating of a continuous web, movable work supporting and propelling means, having an adhesive, non-transferring illm surface, and adapted, while in motion, to temporarily attract and release, successively, all points of one face of the work, coating applying means, in coformer means, adapted to force the work there'against and simultaneously apply a coating to'the opposite face of the moving work, at substantially the points of attraction.

attracted and propelled work, at the points of attraction.

the work-supporting rollers.

of beingmodified when the 3. In a gripperlessjcoating device for handling work in the form of individual sheetsof relatively.

soft, pliable materiaL'possessinglittle or no inherent body firmness, and which sheets are to be coated in a continuous, close succession, so as to similate the coating of a continuous web, movable work supporting and propelling tacky. readily evaporative adhesive means, means in cooperation therewith for rendering its moving supporting surface work-attracting, thereby facilitating a, temporary attraction and an immediately following release, successively, 'of all points of the entire undersuri'ace of the work, coating apply- 11 ing means in cooperation with said movable work supporting-means, constructed and'arranged to force the work against the latter and to simul-' taneously coat its upper surface, while the undersurface of the work is thus temporarily attracted for the purpose of moving the work.

4. In a gripperless coating device for handling work in the form of individual sheets of relatively soft, pliable materiaL'possessing little or-no in-'- herent body firmness, and which sheets areto becoated in a continuous, close succession, so as to similate the coating of a continuous web, rotary work supporting means for supporting the undersurface of, and for propelling the work, said means operatively mounted in a tack-producing medium for rendering its work-supporting surface work-attracting, minutely adjustable, highly flexible medium control means cooperating with said rotary work supporting means, and coating applying means constructed. and arranged to simultaneously force the work against said rotary means and to apply a coating to the upper surface ofthe work, while the latter is inmotion, and substantially at the moment of attraction,

and substantially opposite-the area of the undersurface which becomes attracted.

5. In -a gripperless-coating'device for handling work in the form of individual sheets of relatively soft, pliable material, possessing little orno inherent body firmness, and which sheets are to be coated in a continuous, close succession, so as to similatethe coating of a continuous web, a

rotary work supporting and propelling element, a i

rotary coating applying element, in cooperation therewith, a tack-producing medium covering in a thin, controlled layer the supporting surfaceof said propelling element for rendering that surface work-attracting, control means ior said medium in the form of a finely adjustable, highly resilient blade, in cooperation with said; work propelling element, said coating element constructed and arranged to force the unde'rsurfa'ce of the work against the propelling element and to'simul- 'taneously coat the upper surface of the work,

while the work is in motion, substantially opposite to-the attracted area of'the undersurface and substantiallyduring the period that areaof the undersurface becomes attracted.

6. In a gripperless coating device for handling work in the form of individual sheets of relatively soft, pliable material, possessing little or no in-,

herent body firmness, and which sheets are to be 'coated in a continuous, close succession, so as to similate the coating of a continuous web, a rotary work supporting and 1 propelling element, coating applying means in cooperation therewith and constructed and I arranged to urge the work against said element and to simultaneously apply a coating to the upper face of the work, and controlled, tack-producing means, adhering-to, and

designed to render the work-supporting surface, I

of said element work-attracting, for-the purpose of operatively engagingthe' underface of the work, thus facilitating the propulsion of the work, at the moment its upper face receives a coating from' said applying means, and resilient, finely adiustable'control means for said tackproducing means, in cooperation with said rotary propelling element.

7. In a gripperless coating device for handling work in the form of individualsheets of relatively soft, pliable material, possessing little or no inherent body firmness, and which sheets are to be coated in a continuous, close succession, so as to similate the coating of a continuous'web, a rdtary work supporting and propelling element operatively mounted in a controlled, tack-producing medium, adapted to render its work-engaging surface work-attracting, for the purpose of I propelling the work by way of attracting, its un-' dersurface, resilient, finely adjustable means for controlling thethickness of said medium carried bysaid propelling element, in cooperation with the latter, and coating applying means distanced from, but in cooperation with said element, con

structed and arranged to force the, undersurface of the work against the latter, and to simul-.

taneously apply a coating upon the free, upper surface of the work,-at substantially the moment when, and over substantially -thearea'where the undersurface of the work becomes attracted.

8. In a grip'perless coating device for handling 5 work in the form of individual sheets of relatively soft, pliable material, possessing little orno inherent body firmness, and which sheets are to be coated in a continuous, close succession, so

as to similate the coating (if-a continuous web,

-a vessel containing a tack -producing medium,

a rotarywork-suppor'ting and work-propelling posed above, but distanced from said cylinder,

and constructedand arranged to force the undersurface of the work against the work-supporting,

tacky surface of themoving cylinder, while simultaneously applying a coating upon the uppersurface of the work, at substantially the moment the undersurface of the work becomes attracted. 9. In a gripperless coating device, as setforth in claim 1 and flnger-shapedmeans' in cooperation with and .within the range of operation of said work supporting and propelling means, for preventing the coated work from deviating from its intended course of progress. V I A 10. In a gripperless and disposed above said work crumpling oi thecoated work.

FRANK P. cAmsoN.

coating device of claim 1; a finger-shaped work guard incooperation with S pporting, and propelling means-for. preventing a back flap or'

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