US2187376A - Spraying apparatus - Google Patents

Description

Jan. 16,1940.

F. W. GUIBERT SIPRAYING APPARATUS Filed April 13, 1957 IN VE NTO'R Francis W- Ciuiberf BY ATTQRNEY Jan. 16,

UNITED 4 STATES- PATENT OFFICE.

lclaim.

which the materials adhere. Such decorative materials may be small flakes of mica, or other mineral matter, such as color, silica, or the like. The surface may be formed by a fresh coat, as of paint or. other sticky material. The decorative pieces thus adhere to and become at least partially embedded in the paint.

Attempts to spray such decorative material have not heretofore been entirely successful. This is due to packingor arching of the material adjacent the outlet nozzle; and this is especially aggravated when light materials, such as mica flakes, are used.

It is one of the objects of this invention to obviate this disadvantage; and more particularly by providing an agitator for the material near the outlet. I

It is another object of the invention to provide a simple and effective apparatus to effect the.

spraying of materials onto a surface.

It is still another object of the invention to utilize air pressure for the spraying as well as I for the operation of the agitator.

It isstill another object oLthe invention to make it possible to regulate or control the action of the air pressure for the spraying action as well as for the operation of the agitator, whereby the velocity and volume of. the spray may be independently determined.

This invention possesses many other advan tages, and has other objects which may be made more easily apparent from a consideration of one embodiment of the invention. For this purpose there is shown a form in the drawing accompanying and forming part of the present specification. This form will now be described in detail, illustrating the general principles of the invention; but it it to be understood that this detailed description is not to be taken in a limiting sense, since the scope of this inventionis best defined by the appended claim.

Referring to the drawing:

Figure 1 is a longitudinal section of an appa- 'ratus embodying'the invention;

Fig. 2 is a top plan view thereof, the cover being partly broken away: V

Fig. 3 is a sectional view 3-3 of Fig. 1; and

taken along plane Fig. 4 is a fragmentary front elevation of the "deviceshown in Fig. 1.

" -In the present form .of the invention," the device-lincorporates a container I of sheet metal,

shown in this instance as This conmay be utilized extending from. the side of container may be arranged to have a cover 2 hinged at the top as at 3 so as to permit loading the container l with the flakes l of mica, or other decorative material which it is intended to spray onto a sticky surface. For ready manipulation the container i may be provided with a handle structure 5. This handle structure may be fastened to the containerl as by the aid oi the brackets 6 and '1.

Inorder to permit suspending the device from any appropriate support, a hook member 8 may be provided. This hook member canbe appropriately supported as by the aid of the rivets 9 to the front upper edge of the container I.

At the lower front portion of the container I, a discharge nozzle structure It is provided. As shown most clearly in Fig. 4, this nozzle structure has a discharge opening or generally flat rectangular form. The nozzle l0 diverges toward the body I and communicates with the lower portion of the containeri through an aperture II. The bottom or 'the container l is conveniently formed by a sloping wall i2 having a bottom portion i3 immediately adjacent the opening Ii. In this way the material 4' gravitates toward the bottom oi the container l and toward the opening H, which forms the entrance to the nozzle structure I 0. g

'In the present instance, an ainblast is used for ejecting the material 4 through the nozzle l0, after said material enters this nozzle through the aperture II.

For this purpose, an air nozzle ll is provided and arranged below the sloping wall It. It has a discharge opening I! which extends partially a into, nozzle ll.

any convenient source of compressed air can be to supply air pressure through the nozzle ll. The air connection is provided for example through a hose 1 l6 coupled as by coupling 0 I! to a main control rotary valve l8. The valve I! can be of the plug type, controlled as by handle 19. Its outlet II can project into the bottom or the body I and below the wall H. In order to hold the valve it in proper position, a bracket 2| tainer I to the cylindrical valve body it, -A further brace 22 may be provided between the inlet portion 23 of the valve to the handle bracket 1.

Within the container I, and below the wall I! thereof, the air connection is provided with a branch llgcontrolled by a valve 25. This branch or by-pass has an outlet 28 projecting into the nozzle M at the aperture 21. The nozzle I4 is iurthermore provided with a deflector 18 ada jacent the outlet opening 15 so as to cause a spreading of the air at the base of the nozzle III. Light flaky material, such as ground or flaked mica, has a tendency to pack or arch adjacent 5 the opening H. The result is that little or no mica will pass through the nozzle Iii. In order to prevent the occurrence of packing or bridging, a mechanical agitator 29 is provided within the container l and adjacent the nozzle opening ll. This agitator may be in the form of a helical device, or a flat bar, which may be rotated by any appropriate source of power. For example, it is shown in this instance as a flat bar joined to a stub shaft 30, which may be detachably coupled to a shaft 3| of an air motor 32. The agitator 29 may project from below the bottom l2 through an aperture 33 at the base of the bottom l2.

Air motor 32 may be of any appropriate type, such as the turbine type. It is shown as having its inlet side in communication with the air pp y, as at 34. It is provided with an exhaust connection 35 that also discharges through the nozzle HI, supplementing the air blast provided by the by-pass 26. The velocity of motor 32 maybe controlled independently by a control valve 36. ,The motor structure 32 with the associated attached nozzle l4 may be supported as from a transverse brace 31. This transverse brace is fastened to the inside of the container I below the bottom l2. An angle iron 38, tastened to brace 31, has a' leg attached to a flange 39 of the motor 32 for supporting it.

The supply of air to nozzle l4 for ejecting 35 the material 4 through the main nozzle I0, is provided both from the exhaust of the motor 32, as well as from the by-pass connection 26. The total volume of air through the nozzle I4 is controlled by valves 25 and 36, which inde- 4o pendently control respectively, the flow of air through the by-pass 26, and the flow of air through motor 32 to control its velocity.

Furthermore, the inlet aperture for the nozzle l0 may be controlled by a slide or gate 40, guided 45 by the flanged guide strips 4| (Fig. 4), and ma-,

nipulatable from the exterior of the container l. The lower edge 42' of the gate overlaps the opening II.

By the-aid of the controls provided, it is possible to provide a slow ejection of the material 4 or a fast election of material 4. Furthermore, by proper manipulation of valves I8, 25 and 36, the speed or motor 32 may be varied and therefore of the agitator 29; and this is accomplished independently of the total amount or air passing to the base of nozzle ll.

The manner of use of the device may now be summarized. The light material 4, which may have a tendency to pack, is loaded into the container 1. The gate 49 is moved to the proper position to determine the quantity of flow of the sprayed material. The velocity of agitator 29 is controlled by valve 39. The total amount of air passing to the base of nozzle l0 may be adjusted by the aid of the valve 25, which controls the amount of air supplementing that derived from the exhaust 35 of motor 32.

What is claimed is:

In a device for spraying light divided material 0 and directly from the container into the nozzle,

a mechanical agitator within the container immediately adjacent the opening, a motor supported within the shell outside the container .for operating the agitator, and an ejector nozzle FRANCIS W. GUIBER'I'.

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