US3237277A - Coating device - Google Patents

Description

R. GALLINO COATING DEVICE March l, 1966 Filed April 8, 1965 FIG. 2

INVENTOR. ROBERT GALLINO F" @Jaa 7M@ ATTORNEYS United States Patent O New Jersey Filed Apr. S, 1965, Ser. No. 446,655 4 Claims. (Cl. 29-121) This application is a continuation-in-part of application Serial No. 338,489, filed January 17, 1964 (now abandoned) for a coating device by the present inventor.

This invention relates to a coating device for applying a uid material to a moving web and in particular to a coating `device which simultaneously applies and cleans the coating material.

A major problem in the application of coating material to a moving web is caused by the dirt and grit which accumulates in the coating material being applied to the moving web, thereby causing streaks and other defects.

One solution to this problem has been to pass the coating material fluid through strainers and filters, etc. However, in the process of recirculation of the coating material, the coating material tends to dry on the color pan after the staining process has been completed.

It is, therefore, an object of this invention to provide an improved device for applying coating material to a moving web.

It is another object of this invention to provide a method and device for removing, or at least substantially reducing, the amount of the surface Vdirt and grit which accumulate in the coating uid during the coating operation.

It is a further object of this invention to provide a device which simultaneously applies a coating material to a moving web and filters dirt and grit from said coating material during the application thereof.

Other objects and a fuller understanding of the invention may be had by reference to the following description and claims, taken in conjunction with the accompanying drawings in which:

FIG. 1 is a perspective view of the invention.

FIG. 2 is a side elevation view of the invention.

FIG. 3 is a schematic diagrammatical View of the apparatus for applying a coating material to a moving web.

Accordingly, this invention consists of an applicating roller to be used in the application of a color coating to a moving web, in which said roller is in itself, a filter or strainer.

Referring now to the drawings wherein similar reference numerals identify corresponding parts throughout the several views, the applicating roller consists of an outer cylindrical surface 14 which is of constant radius and is constructed of a mesh wire-like material. A second surface 16 is placed within surface 14 and is similarly constructed of a mesh wire-like surface. Surface 16 however, is in the shape of a conical frustrum having its Wider aperture face at the end in which the coating fluid material is fed into the applicator. The two surfaces are separated from each other by means of a suitable separator such as a circular disk placed between the two surfaces at the outer faces thereof.

In the operation of this invention the roller is made to rotate by any suitable means (not shown here) and is placed in intimate contact with a movable web 12 moving tangent to the applicating roller. The coating material fluid is fed into the inlet 18 end of roller 10 at the end at which inner surface 16 has its larger opening.

The coating material fluid then builds up a back pressure due to the decreasing diameter of the inner surface. Fluid is then passed through the outer surface 14 and then on to the moving web 12. The fluid so extruded onto the moving web is now remarkably free of dirt and 3,237,277 Patented Mar. l, 1966 grit due to the filtering process which the fluid has undergone while being extruded through the inner and outer mesh wire surfaces.

The coating fluid is rejected, or does not pass through the inner and outer surface screens of the applicator roller 10, is retrieved at the outlet end 20 of the roller at which the smaller radius aperture of the inner surface 16 is positioned.

Any excess material which passes through the inner and outer surfaces but is not applied on the web 12, will fall `and be caught in a lcatch pan 22 located below the application roller 10.

In a preferred embodiment of this invention the diameter of the outer surface 14 would be l0, said outer surface being made up out of 200 mesh wire, and the covering on the inner surface 16 would be made up of 100 mesh wire. The inlet 18 and outlet 20 core radii would depend upon the viscosity of the coating material fiuid used, said diameters being such as would cause the coating material fluid to exert approximately 25 pounds per square inch pressure on the inner surface screen of the roller.

While only a single embodiment of the present invention has been described, it will be understood that many changes and modifications may be made therein Without departing from the spirit of the invention, as defined by the appended claims.

What is claimed is:

1. A rotatable fluid coating device for use in combination with a moving web for applying a uniform coating to the web, said coating device comprising; a cylindrically shaped wire mesh surface adapted to be horizontally disposed in intimate contact with the web, a second wire mesh surface concentrically disposed within said cylindrical surface, said second surface being conically shaped and open at both ends, a pair of spacing means inter-connecting the respective ends of said surfaces for separating said first and second wire mesh surfaces.

2. A rotatable fluid coating device for use in combination with a moving web for applying a uniform coating to the web, said coating device comprising; a cylindrically shaped wire mesh surface adapted to be horizontally disposed in intimate contact with the web, a second wire mesh surface concentrically disposed within said cylindrical surface, said second surface being conically shaped and open at both ends, spacing means inter-connecting the respective ends of said surfaces for separating said first and second wire mesh surfaces, said spacing means including a first disc coupled to one end of said first surface and the larger open end of said second surface, said disc having an aperture communicative with the 4larger open end of said second surface to form the input of said coating device, :a second disc coupled to the opposite end of said first surface and the smaller open end of said second surface, said second disc having an aperture communicative with the smaller open end of said second surface to form the outlet of said coating device.

3. The coating device as recited in claim 2 wherein said first surface has a wire mesh of 200 and said second surface has a wire mesh of 100.

4. A rotatable fiuid coating device for use in combination with a moving web for applying a uniform coating to the web, said coating devicecomprising a cylindrically shaped wire mesh surface adapted to be horizontally disposed in intimate contact with the web, a second wire mesh surface concentrically disposed Within said cylindrical surface, said second surface being conically shaped and open at both ends, a first spacing disc coupled to one end of said first surface and a larger open end of said second surface, said disc having an aperture communicatvie with the larger open end of said second surface to form the input of said coating device, a second spacing disc coupled to the opposite end of said first surface and a smaller open end of said second surface, said second disc having an aperture communicative with the smaller open end of said second surface to form an outlet of said coating device, the arrangement such that said uid is adapted to be ltered through said rst and second wire mesh surfaces under pressure.

References Cited by the Examiner UNITED STATES PATENTS Sculley 118-259 X Kollmann 15-562 Spencer 29-121 Frisco et a1. 118-258 X Weber et al. 118-259 Crowley et a1.

Hopkins.

WALTER A. SCHEEL, Primary Examiner.

10 BILLY I. WILHITE, Examiner.

Claims (1)

1. A ROTATABLE FLUID COATING DEVICE FOR USE IN COMBINATION WITH A MOVING WEB FOR APPLYING A UNIFORM COATING TO THE WEB, SAID COATING DEVICE COMPRISING; A CYLINDRICALLY SHAPED WIRE MESH SURFACE ADAPTED TO BE HORIZONTALLY DISPOSED IN INTIMATE CONTACT WITH THE WEB, A SECOND WIRE MESH SURFACE CONCENTRICALLY DISPOSED WITHIN SAID CYLINDRICAL SURFACE, SAID SECOND SURFACE BEING CONICALLY SHAPED AND OPEN AT BOTH ENDS, A PAIR OF SPACING MEANS INTER-CONNECTING THE RESPECTIVE ENDS OF SAID SURFACES FOR SEPARATING SAID FIRST AND SECOND WIRE MESH SURFACES.

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