US1031427A - Screening-machine. - Google Patents

Description

T. M. DEVINE.

SCREENING MACHINE.

APPLICATION FILED JUNE 5, 1911.

1 5031, 127. Patented July 2,- 1912.

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UNITED STATES PATENT oFFIoE.

THOMAS M. DEVINE, OF CLEVELAND, OHIO, ASSIGNOR TO THE OHIO VARNISH COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

SCREENING-MACHINE.

To all whom it may concern:

Be it known that I, THOMAS M. Dnvmn, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Screening-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

The object of this invention is to provide a simple and effective mechanism for screening liquids; more particularly the mechanism is designed to remove the skins which form on paint whereby paint is put in condition for use.

To this end the invention comprises a vessel with intake and exit pipes, a suitable revolving drum-like screen which receives the imperfect paint through the entrance pipe and is adapted to retain the skins, allowing the passage of strained fluid.

A more particular embodiment herein shown is also comprised within my invention, wherefore the invention may be conveniently summarized as consisting of the combinations of cooperating parts herein described and claimed.

In the drawings, Figure 1 is a vertical longitudinal central section through my apparatus; Fig. 2 is a transverse central section thereof; Fig. 3 is a detail showing the construction at the junction of the head and body of the vessel; Fig.4 is a detail illus trating the band for clamping the screen cloth in place; Fig. 5 illustrates the means for securing together the ends of the screen cloth.

As shown in Figs. 1 and 2, the body of the vessel is of a somewhat rectangular shaped structure having, as shown, vertical walls 10 and 11, the top plate 12, the hopper-like bottom 13, and an end 14. In place of the other end of the tank body is a removable head 20. This head is tightly secured .to the body by means of bolts 21 passing through the head and flanges 16 on the body through an interposed gasket 25. This is shown more fully in Fig. 3. It will be seen that the head and body make a closed tank having only the entrance to the center of the head (to be hereinafter described), and the exit at the bottom of the hopper. This exit consists of the pipe 18 which leads downwardly into the shut-ofi' cock 30 of a Specification of Letters Patent.

Application filed .Tune 5, 1911.

Patented July 2, 1912.

Serial No. 631,482.

usual construction. The top 12 of the tank is also preferably made as a separate piece and secured to the flanges 17 of the walls by bolts 18. The entrance to the vessel is provided by a pipe 40, which is shown as passing through the center of the-head 20 and is firmly fixed to the head by reason of the head being bolted to a collar 41 rigid on the pipe. Outside of this collar the pipe is shown as having an elbow 42 and then a section 43 connected by a union 44 with a main pipe having a flange or cock 45.

50, in Fig. 1, indicates a driving shaft provided with a pulley 51 and mounted in suitable bearings, one of which is indicated at 52. This shaft extends through a stufllng box 54 on the head 14 of the tank. This shaft within the tank drives the rotatable drum-like screen 60, which will now be described.

The drum has two disk-like heads, one of them designated 61 being rigidly mounted on the inner end of the shaft 50, as by having a central internally threaded boss 62 screwed on the end of the shaft. The other head 64 is loose on the pipe 40, which forms a bearing for it. Connecting the two disks 64 and 61 seating in notches therein and secured firmly thereto are longitudinal bars 65. Surrounding these bars is the screen cloth 66 which lies outside of the bars and overlaps the two disk heads 61 and 64 and is clamped in place by a series of straps 68. These straps have outwardly turned ends 69, as shown in Fig. 4, and these ends are bolted together by bolts 67. As shown in Fig. 5, the overlapping edges of the screen cloth may be reinforced by metal strips 70 through which pass bolts 71.

The construction described makes astrong and stiff screening drum. The paint enters this drum through the pipe 40 and passes out at the bottom and sides of the drum. The continuous rotation of the drum carries the skins away from the screen surface where they tend to stick, presenting an unimpeded mesh for the passage of the liquid paint.

To prevent the skins from unduly clogging the mesh of the screen cloth, I prefer to provide a suitable brush, stationary in action, and lying in contact with the inner surface of the screen cloth sothat, as the drum revolves, the skins are continuously brushed off of the surface. Such brush is shown in Figs. 1 and 2 and designated 80. It consists of suitable bristles or wires carried by a bar 81. To enable the brush .to be conveniently put in place and removed when desired I support the brush by links 83 and 84 pivoted at their outer ends to the bar 81 and at their inner ends to an extension 46 of the pipe 40. As shown in Fig. 2, this extension consists of two side portions of the pipe left by cutting it away at the top and bottom, the links being mounted on bolts 47 and connecting the side portions 46. Each link 83 or 84 is shown as consisting of two bars pivoted on opposite sides of the bar 81 and spaced at their lower ends by distance pieces 48 on the bolts 47. When the parts are in place the brush occupies the position shown in Fig. 1, being. held by the links 83 and 84 and the head 61 against which the end of the bar 81 abuts. This bar is preferably provided with a roller 82 which runs on the internal surface of the head 61. lVhen it is desired to remove the brush or other parts, the union 44 is disconnected, the bolts 21 taken out and the head 20 and pipe 40 drawn outwardly as a unit. In this movement the left hand end of the brush bar 81 (Fig. 1) abuts the inner face of the head 64 and the continual withdrawal of the pipe 40 causes the bar 81 to descend so that it comes into the axis of the pipe 40 between the projecting portions 46 and is withdrawn with that pipe. Then the simple unscrewing of the shaft 50 from the boss collar 62 enables the drum to be drawn out. Then the taking out of the bolts 67 and the bolts 71 entirely frees the screen cloth from the drum skele ton. This enables the cloth to be replaced with a fresh cloth, when desired. In the assemblage of the parts, after the drum is secured to the shaft 50, the brush and pipe 40 are inserted while in substantial alinement with each other, the end of the brush bar abutting the end of the shaft 50 and traveling outwardly as the pipe is shoved in. A suitable pin 49 carried by the pipe arms 46 prevents the brush dropping out of place during its installation.

In certain cases it will be found more convenient to remove the drum through the top of the casing, then through the end. In order to accomplish this end, the collar 41 is disconnected from the end plate 20, and the pipe 40 drawn endwise from the casing and drum. This movement causes the collapsing of the brush as before, so as to permit its withdrawal through the end plate 64. The removal of the top plate 12 and the unscrewing of the shaft 50 will permit the easy removal of the drum.

The bars 65 are preferably flat and thin, so that they do not unduly displace the brush bristles as the drum revolves.

Having thus described my invention, what I claim is 1. The combination, with a screen drum having disks at its ends and one of said disks having a relatively small central perforation, of an axial inlet pipe projecting into said perforation, a brush carried by said inlet pipe and adapted to be pressed outwardly against the interior of said screen, said brush being adapted to be collapsed and withdrawn through said perforation.

2. The combination, with a revoluble screen drum having disks at its ends and one of said disks having a relatively small central perforation, of an axial inlet pipe projecting into said perforation and forming a support for the drum, a brush carried by said inlet pipe and adapted to be pressed outwardly against the interior of said screen, said brush being adapted to be collapsed and withdrawn through said perforation, a casing surrounding said drum and having removable portions permitting removal of said drum, and means for rotating said drum.

3. The combination, with a screen drum having disks at its ends and on e of said disks having a relatively small central perforation, of an axial inlet pipe adapted to extend into said perforation and having a forwardly projecting extension, a pair of links pivoted to said extension, a bar pivoted to the outer ends of said links and having bristles carried by its outer edge and forming a brush, said bar and links being adapted to be folded into alinement with said pipe so as to pass through said perforation, means for moving the said bar laterally away from said extension after its insertion within said drum so as to cause the bristles thereof to bear against said screen, and means for imparting a relative rotative movement to said drum and brush.

4. The combination, with a screen drum having disks at its ends, one of said disks having a relatively small central perforation and the other of said disks having a fiat inner surface, of an axial inlet pipe adapted to extend into said perforation and having a forwardly projecting extension, a pair of links pivoted to said extension, a bar pivoted to the outer ends of said links and having bristles carried by its outer edge and form ing a brush, said bar and links being adapted to be folded into alinement with said pipe so as to pass through said perforation, and said bar having its outer end adapted to con tact with the flat inner surface of said other disks, whereby upon the insertion of said pipe into said perforation said bar will be moved laterally away therefrom and will have the bristles carried thereby pressed against the inner surface of said screen, and means for imparting a relative rotative movement to said drum and brush.

5. In a mechanism of the character set out, the combination, with a vessel, of a screen drum within the vessel, a revoluble shaft connected with said drum for rotating it, and a removable intake pipe extending into the drum, a brush within the drum carried by the intake pipe by mechanism adapted to hold the brush against the interior of the screen or allow it to substantially aline with the intake pipe for removal.

6. The combination, with a vessel, of a screen drum within the same, a revoluble shaft connected with one end of the screen drum for rotating it, an intake pipe extending into the screen drum and passing revolubly through the other end of the vessel, a brush within the screen drum, and links connecting the same with the intake pipe and adapted to allow the brush to assume a position substantially in alinement with the intake pipe for removing it.

7. In a device of the character described, the combination of a vessel, a stufling box carried at one end thereof, a revoluble shaft extending through such stufling box, a screen a drum Within the vessel having a disk-like head and connected with the revoluble shaft, an intake pipe in alinement with the shaft extending through the opposite wall of the vessel and into the interior of the drum, said drum having a head journaled on such intake pipe, a brush within the screen drum carrying a roller adapted to engage the disk connected with the shaft, and folding mechanism connecting the brush with the intake ipe. p In testimony whereof, I hereunto afiix my signature in the presence of two witnesses. THOMAS M. DEVINE. WVitnesses:

BRENNAN B. W'nsr, HAROLD E. SMITH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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