US1557975A - Painting machine - Google Patents

Description

oct. zo, 1925.

L. BROWN, JR

PAINTING MACHINE 5 Sheets-Sheet 1.

Filed Dec. 2l. 1922 .EME E k .EME

LeVanae/-Braf//ZJL fm l Oa. 72o, 1925.

L. BROWN, JR

PAINTING MACHINE Filed nec. 21. 1922 5 sheets-sheet 2 f f, a n/ n Wm. f .Y 0 f l E] t d# W M n Oct. 20, 1925.

PAINTING MACHINE L. BROWN,

Filed Dec. 21. 19,22 SYSheets-Sheet 3 verande/- Efon/ Filed' Dec. 21. 1922 5 sheets-sheet 4 r. Wm J f mm m r Bm /Ha f w M m `a.. y@ com mom Oct. 20,1925 1,557,975 l.. BROWN, JR

PAINTING MACHINE yFig-'1a. Fig-E.

LeVandef-Brofm/ ff .l

- Patentedlct.l 20, 1925.`

UNITED ls'rsrEs Y ,1,551,915 PATEN'r oFFlfcE.

- LEVANDEB BROWN, JR., 0F MONTREAL, QUEBEC, CANADA.

PAINTING IMACIElIiIIll.

Application med December 21, 1922. Serial' No. 808,383. q

T o all lwhom it may eo'lwm Be it known that I, LEVANDER BROWN, J r'., mechanical, supervisor, of the city of, Montreal, Province of Quebec, I)ominion of Canada, have invented certain new and useful Improvements in Painting Machlnes; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates particularly to pamting machines of the type 1n whlch boards, planks, scantlings, posts, studs andthe l1ke and other things requiring painting are passed through a yreceptacle or chamber containing the liquid paint and durlng .the process the articles are dipped 1n the paint. There hasl been considerable waste of paint and time incident to these methods of painting and the paint has not been uniformly applied and my inventlon has for lts ob]ec1I to overcome these disadvantages.

To this end my invention may be said broadly to consist in subjecting boards, planks, scantlings, and the like and 1n fact any article'it may be desired to give a complete or partial coat of paint, to a fine spra of paint in a machine consisting o f atan ,for containing the liquid paint in its lower A portion and a series of pipes having their lower ends submerged in the paint and their upper ends in the form of nozzles located comparatively close to the article to be .painted as it is supported in the chamber withinthe' tank above the body of liquid paint. Compressed air nozzles with roper pipe connections are supported pre erably at .right angles to the paint nozzles and with the paint nozzles so directed that the flow of' compressed air across the mouth `of the paint nozzles will spray the paint in atomized 'form over the article or a portion of it according to the angular positions of the atomizers. In the-preferred embodiment of the invention the tank is mounted on` a truck in the form of a lfour wheeled buggy, the tank being closed on all sides and the top while openings'in its opposite ends are provided for the introduction of the boards, etc., at one end and their discharge at the opposite end. Paint atomzers are located in position to spray the top, sides and -bottom of the boards, etc., as they pass through the tank. I have provided, as will be presently shown, a particular arrangement of piping to feed the atomizers. This arrangement of iping may be varied, and the pipes may be xed or movable. The paint isfagitated to prevent settling, preferabl by compressed air. As a compression o 4air will be developed within the tank and consequentl a tendenc given to the atomized paint ito ow outwar ly .through the feed and discharge openings for the boards, etc'., an exhaust 1s provided which consists preferably of a duct 1n the form of a relatively large bore pi e communicatingv with the upper end of t e atomizing chamber within the upper portion of the tank, such exhaust pipe standing above the tank and having a condenser or separator at` its upper end by which the paint particles are separated from the air flowing therethrough to the atmosphere, the paint thus separated bein returned to the tank.' The-exhaust is ac ce erated by a jet of compressed air direct into the duct and projecting in the direction of the condenser or separator. y I also provide for the separation of the surplus paint in the atmosphere of the chamber above the sprays, this being efected by flat inclined surfaces upon which the paint ispreci itated and which conduct ihe paint thus co lected away from the articles being painted and return it to the body of paint 1n the bottom of the tank. The suction pipes by which the paint is drawn to the atomizers have strainers on their bottom ends to prevent lthickened paint or foreignsubstances from obstructing the pipes.

`One of the particular features of this invention is the condenser or separator by which particles of paint are separated from the air exhausted from the atomizing chamber. This condenser or separator is adapted to present inclined bailiing faces to the atomized paint as it leaves the duct to reclaim the surplus paint, these faces coacting in such a manner`that the draft without being retarded is caused to follow a tortuous path as it leaves the duct and in doing so recipitating the paint particles on these aces. In the loutward iow it. passes through a perforated screen and is again deflected by other faces. and made to return through the perforated screen in the reverse direction and is'finally deflected upwardly and out of the condenser or separator. This causes further precipitation with each change of direction with the result that the minimum amount of paint passes to the atmosphere while the reclaimed paint is conlducted back to the tank. Valves'for reguthey are passed Ithrough the machine and they mechanicaleed also form features of my Figure Fi re 2 isa `longitudinal vertical sectiona view taken on l1ne 2-2 Figure 1;

i Figure 3 is a rear elevation of the buggy;

chine;

' Figure 4 is a detail elevation of the feed mechanism for introducing the articles to be painted; 'I

Figure 5 is a transverse sectional view taken on line 5-5 Figure 2;

Figure 6 is a .front elevation of the ma- Figure 7 is a detail plan view of the paint separator for the exhaust duct;

Figure 8 is a side elevation of the machine illustrating particularly the arrangement for iping and system of y'valves for controllmg the air supply, regulating the atomizers and controlling the agitator; v Figures 9 and 10 are side elevation and plan view respectively of one of the atomlzers' Figures '11 and 12 are detail illustrations of the nozzle common to all the atomizers; l Figures 13 and 14 are detail views of one of the strainers for the paint suction pipes;

Figu e 15 is a 'detail perspective view of the int'rior of the separator and illustrating particularly the faces for deiecting the atomized paint andcollecting the precipitated paint particles;

Figure 16 is a transverse vertical sectional @view of thev separator taken on line 16-16 @"3 liu-iside ofthe box with the bottom removed for 'fthe Figure 17; v

Figure 17 is a detail plan of the underpurpose of better illustration of the partlcular arrangement of the baille devices; and

one' of thealing devices removed and shown in elevation from the center of the box, side elevation and inside p an view res ectively.

the vention i ustrated in the drawings the tank is replresented as a wooden box-like structure aving sides 20, 21, ends 22 and 23, a bottom 24 presenting forwardly extending center sill 124 and top 25, the sides being reinforced by bars 26. The rear and front ends of the box 22 and 23reshpectively have openi s 28 and 27 respectively for the entry of ards, etc. and egress thereof, these openings being covered on the outside Figures 18%19 and 20 -are detail views of referred embodiment of my in-` provide access-to elbow 38'to project at right angles to each other.v These lnozzles andthe complete atomizer 'formed thereby are shown in detail nFigures 1, 2, 5 and 9. vThe air nozzles of the atomizers are connected to a main compressed air supply pipe 46 by pipes 40, 41 and 42 through valve controlled branches 47, 48 and 49, the air connection from any available source of com ressed air is indicatedat 43 and the end o this main pipe 46 has a blow0lf cock 44. The oil or paint nozzles have feed pipes 45 each having strainers covering its lower end and consisting preferably of a brass wire screen 50 with perforated tin top and bottom ends 51 and 52 respectively. These strainers are illustrated in detail in Figures 13 and 14.

The vlower ends of these oil pipes are 1ocated a short distance above the bottom of the tank. An agitator located on the bottom of the tank consists Qf a jet frame consisting of a feed pipe 55, a longitudinal horizontal pipe 56 coupled thereto and having four transverse branch pipes`57, these pipes 57 having perforations in their sides through which jets of compressed air are rojected horizontally into the liquid paint i AThe exhaust duct consists of a stand lpipe 70 of relatively large bor'e carrying the paint separator. It is connected by branches 71 lto suction ducts 72 carried by the side 21 of the tank near the top thereof and communicatin with the chamber in the. tankl above the body of paint. The lower end of this stand pipe has a reclaimed paint pipe `75 connected thereto and communicating at its lower end with ahorizontal pipe 76 entering the tank above the paint body and communicating in turn with a pipe 77 extending downwardly in the paint body. This-pipe 76, for convenience, is extended inwardly beyond pipe 77 to present a support 78 for the boards', etc. as they lare fed lthrough the machine. This will be presently further alluded to. The paint con- I densen' or separator carried b the top of the by` a-pi union to the bottom of the con-pA denser x preferably at one corner and Stand-pipe consists preferab y 'of a rectanis als a paint.- rainage 'pipe 82 connected communicating at itsvlower end, by bow 83 with a T-cou ling 84; by which co'mmunicationis also e ected between the pipes 75 and 76. vThe box. referablyj consists of galvanized iron vand as its ytop edge 1nv wardly bevelled to shed water` as at 87 forming the edge of an opening 88 closed by a cover 89 having a counterweight in the.

form of a balanced nut 9 0'on astern 91 so arranged and balanced that the pressure of the outwardlowing air 'will raise the cover and rmit of the exhaust. The opening 85 in t e bottom of the condensing box and communicating with the stand pipe 70 is surrounded by a rectangular enclosure 86 of perforated plate or wire netting extending from the bottom' to within a short distance of the mouth of the box, and the opening 85 has extendin above it a series of bailling devices in the orm of inclined vanes presented byangular imperforate plates 100. These plates are cut to presentwhen folded a rectangle triangle with their longest ed es or bases 101 soldered or otherwise rigi ly secured to the sidev of the perforated rec-V tangular enclosure 86 thus presenting apices 102 making contact with the sides of the ehclosure at a level located about one-third distance from the top of the enclosure while the apices of the right angles being located midway of the height of these' devices disposes the ridges 103 in planes of'45 degrees to the sides of the enclosure. The edges 104 of the several devices are soldered together. The structure thus produced is of star form in plan view andas it extends completely over the mouth 85 of the uptake 70, the draft, induced in a manner to be presently alluded to, will meet the point 105 and be divided and deflected. upwardly and outwardly as will be resently shown. A

The raft is induced by a jet of compressed air directed up the pipe 70 by a nozzle 110- on theend of a pipe 112 controlled by a valve 113 .through which the acceleration of the draft up the pipe-,70 is regulated. The air pipe 112 extends through the side ofthe tank and through asplug 114 in a T-coupling 115 coupled to' one .end of the pipe 78, the other end of which is coupled to a T-coupling 116 connecting this pipe 78 and the pipe 76 and 77 together, tle pipe 112 continuing through the coupling 115, pipe 78, coupling 11.6,

pipe 76, T-coupling 84 and upwardly ;in the pipe 70. The vertical opening in coupling 115 is plugged as at 117.

'- The T-coupling 115 is emplo ed for com I venience in construction, this tting being ordinarily carried in stock and readily available while as it conforms to thecoupling'116 it lends uniformity to the design of the machines and at the same timethe flanges 119 and 120 serve as guides forthe boards, etc. supported by the pipe 78 while being fed through .the machine. 'In o rder to prevent dripping of paint from. the roof of the atomizing chamber onto the boards, etc.- being passed through" thc machine a galvanized iron plate bentto present surfaces 125 inclined downwardly throughout the full length of the chamber is attached to the vundersidexfof the cover 'of the machine, the side of this plate adjacent tothe cover hinges is extended and inclined downwardly as at 126 to deflect the paint i drippings into the tank when the cover is raised.

ed "boards, etc. before they pass through the horizontal plane of the sill of the entering `and discharge openings 28 and 27.v This platform is presented by the top 131 of a tool box 132, the top sheet of galvanized iron and the sidesl of the box being extended as at 133 to support the platform while a hinged door 134 permits of access to the tool box. Guides are secured on the platform to direct the boards. This tool box is supported'on the side sills. The boards, etc. are fed mechani-. cally into the machine by a pair of rubber rollers- 150 and 151, the roller 150 being driven by shaft 152 which in turn is driven by an air turbine 152. The latter is supplied with air through a pipe .152B which is connected to ipe 61 as indlcated in Figure 8. A pair ofp gears 153 and 154 carried by this shaft and a shaft 155 of-roller 151 transn mit rotation from sli-aft 152 to shaft 155.

The surface of the supporting` roller 150 is 166 to the tank. The s aft 155 is rotatably nded in bearings 156` and the louer of suspension rods 157 are adjustably supported by nuts 1 58 resting on the horizontal flange 159. This feed roll 151 is variable as to its feed position to accommodate different thicknesses of boards, etc. and

SUS

en S

in order `to allow ,of this the suspension rods To facilitate the handling of the unpaint-4 being covered by a' 157 are provided with encircling springs 170 supported by nuts 171 and bearing between I them and the underside of flange 159. These springs 170 give pressure to the up erl feed roll. A clean-out pipe 200 provided) with a valve is connected through the bottom of l eed the boards direct y from the latter to of the present invention.

the former and it is to be distinctly understood that the 'same comes within t e scope Operatz'mt.

zles of the atomizers being first adjusted to direct sprays of atomized paint against the surfaces of the boards, etc. as they pass through the box. The adjustment of `the nozzles of each atomizer relatively to each other and in relation to the thicknesses' and widths of the boards, etc. is effected by turning the nozzle pipe arms at the various joints which enables the nozzles to be directed where desired. The boards are fed into the tank through opening 28 by the feed rollers to which they are fed by hand. As they are projected through the machine they are supported by the piatform,the bottom roller of the feed deviceand`on pipe 78 and`guided by the flanges 119 and 120 and issue through opening` 27 from which the are removed and dlsposed for drying. s the boards, etc. pass through the machine the spray from -atomizers 30 and 31 completely coat the top surface while the'atomizers 32 and 33 coat the side surface and the atomizers 34 and 35 the bottom surfaces. The valve 113 is first opened which causes a draft from the tank to be induced into exhaust duct 7 0, the agitator valve 62 is then opened thus stirring up the paint in the tank. The valves of the atomizers are then opened and the machine commences operation. As the boards pass through the machine the intake and outlet openin s 28 and 27 are closed by the curtains 29, te suction of the exhaust duct creating an inward motion of the atmosphere through these openings thus preventing the atomized paint from finding its wa into the room or area where the machine is eing operated, the atomizing chamber withinthe tank above the liquid paint beingl charged with the paint vapor, and the paint content of the atmosphere of this chamber being high and the atomizers projecting sprays directly onto the surface of the boards, etc. Howeveryfast the latter are.

fed through the chamber they immediately laning machlne and.

become completely coated with paint.

ile this operation is'going on the\draft of exhaust duct 70, with lts accelerator 110, causes a gentle movement of the atmosphere of the chamber upwardly throu h the duct to the paint separator 80. In t is se arator the current of paint laden air, as s own in Figure 5, comes first in contact with the under sides of the inclined faces of the star shaped deflecting surfaces by which the flow is efiected outwardly in al1 directions and through the perforated plate 86 and is againv deflected and turned back by the interior of the fiat sides of Abox and again passes through the perforated plate 86 to be'a third time deflected by the upper inclined faces of the star and finally by the inclined flange 87 surrounding the outlet mouth of the box.

`-These deflectors of the paint laden air The tank is first charged preferably to' the depth indicated in Figure 5 and the nozcauses the paint to be preclpitated on the various surfaces by which it is deflected and through which it passes and it finds its way from the star, both sides of the inclined plates of which shed the precipitated paint, from the perforated sides of the enclosure 86 and the interior-of the box 80 to the re? with relation to the coating of cards, etc.

with paint it is equally applicable to the treatment of any articles with a substance without departing from the spirit of my invention.

What I claim is as follows:

1. In a portable tank for the treatment of articles with a substance, said tank having lan entrance in one wall and an exit in an opposite wall for permitting the passage of the articles in a straight line. through the box, means for atomizing the substance within' the chamber, said means consisting of a pluralityl of relatively fixed atomizers,

means for subjecting the articles to the atomized substance within the chamber andA means lfor exhausting the atmosphere from the chamber.

2. In a portable tank for the treatment of articles with a substance, the interior of the tank constituting an open chamber containlng the substance, means for. atomizing the su stance within the chamber, means for subjecting the articles to the atomized substance within the chamber, means for ex'- hausting the atmosphere from the chamber and means for ,reclaiming the paint from the atmosphere exhausted from the chamber.

3 In a portabletank for the treatment of artlcles with a substance, the interior of the box constitutlmgl an open chamber containing the substance, means for atomizing. the substance within the chamber, means for subjecting the articles to the atomized substance within the chamber and means for deliecting dripping of the substance within the chamber from the articles.

.- and its air pipe projecting t entrance and exit openings in oppositely dis- `posed walls, and means for feeding the articlesto be treated through the openings. '5. Inl-an apparatus of the type described l a receptacle for 'containing a liquid substance for the treatment of articles, means for atomizing the substance within theyreceptacle, means for exhausting the atmosphere from the receptacle,l means for reclaiming the paint from the atmosphere exhausted from the receptacle consisting of a vertical exhaust duct having at its to a devicel for deilecting the air current owing ffrom the ,duct, and means for collecting the substance precipitated by thedeflection of the air currents.

6. In a chamber for the treatment ofarticles with a substance, means for atomizing the substance within the chamber, means for subjectingy the articles to the atomized substance within the chamber, means for exhausting the atmosphere from the chamber and means for reclaiming the paint from the atmosphere exhausted from the chamber `consisting of a vertical exhaust duct havingat its top a device for deiecting the air current flowing from the duct and .means for .reclaiming the substance precipitated by the deflection of the air currents and returning it to the chamber.

7. In a chamber for the .treatment of ar-y ticles with a substance, a pressure fluid supply, means for atomizing the substance withwhich constitutes a unita in the chamber, said means being connected to the pressure fluid-supply and means for subjecting the articles tov the. atomized substance ,within the chamber -conm'sting of, means operatively connected tothe pressure fluid supply and actuated by the\pressure fluid for mechanically feeding the articles through the chamber.

8. A portable machine for treating ar-l ticles consisting of a tank the interior of chamber for containing in its lower portion a liquid treatment substance, atomizing means located within the chamber, said means consisting of a series of pi es with their lower ends dippinginto the iquid and having nozzles at their upper ends, a series of compressed air pipes with nozzles at their." ends, means for coupling the air and liquid no'zzlesllin pairs, means for positioning the air nozzles relatively to the liquid nozzles to form at .omizers, means for sup orting the said atomizers relatively to t e articles to Vbe treated.

9. A portable machine-for treating articles i consisting of a tank for containing in its lower'portion a liquid treatment substance and presenting a chamber in its upper portion, a series of pipes with their lower ends dipping into the liquid, and having nozzles at vtheir upper ends, a series of compressed air pipes with nozzles at their ends, means for coupling the air and liquid nozzles in pairs, means for ad Justably positioning the air nozzles relatively to the liquid nozzles to form atomizers, and means for sup orting the said atomizers relatively to te .articles to be treated.

10. A portable machine for treating articles consisting of a tank for containing in its lower portion a liquid treatment substance and presenting a chamber in its upper portion, a series of pipes with their lower ends dippi ing nozzles at their upper en s, a series of ends, means for coupling the air and liquid nozzles in pairs, means for positioning the air nozzles relatively to the liquid nozzles to form atomizers, means for adjustably supporting the said atomizers relatively to the articles to be treated.

11. A portable machine for treating articles 'consisting of a tank for containing in its lower portion a liquid vtreatment substance and presenting a chamber in its upper portion, a series of pipes with their lower ends dipping into the liquid and having nozzles at their upper ends, series of compressed .air pipes with nozzles at their ends, means for coupling the air and liquid nozzles in pairs, means for positioning the air nozzles relatively to`the vliquid nozzles to form atomizers, means for supporting the said atomizers relatively to the articles to be treated and means for agitating the liquid substance.

12. A machine for treating articlescon'- sisting of a tank for containing in its lower portion a liquid treatment substance and presenting a chamber in its upper portion, a series of ipes with their lower ends dipping into t e liquid and having nozzles at their upper ends, a series of compressed air pipes \with nozzles at their ends means for couplin the air and liquid nozzles in pairs, means or positioning the air nozzles relatively to the liquid nozzles to form atomizers, means for sup orting the said atomizers relatively to t e articles to be treated, means for agitating the h uid substance consisting of aperforated ollow device.

into'the li uid and havp compressed air pipes with'nozzles at their i l i 13. A portable machine for treating articles consistin of a tank for containing 1n its lower portion a liquid treatment sub.- stance and presenting a chamber 1n its u per portion a series of p1 s with their lower ends dipping into the 1qu1d having nozzles at their upper ends, series of compressed air pipes with nozzles at their ends, means forcoupling the a1r and hquld nozzles 'in pairs, meansfor positioning the air nozzles relatively to the hquld nozzlesl I ping into t e liquid and having nozzles at their upper ends, a series of compressed air pipes with nozzles at their ends, means for couplin the air and l1qu1d nozzles 1n palrs, means or positioning the alr nozzles relatively to the liquid nozzles to form atomizers, means for supportin the said atomizers relativel to the artic es to be treated, means for agltating the liquid substance, a perpendicular exhaust duct communlcatmg with the upper` portion of the chamber, means for accelerating the exhaust draft in .the duct, means for reclaiming the substance carried through the duct by the exhaust draft and means for returning the substance to the tank.

15. In a portable apparatus of the type described a liquid containing chamber having an exhaust duct, means for atomizing the liquid in the accelerating the exhaust draft in the duct, the said accelerating means lconsisting of a compressed air pipe extending upwardly into the duct for projecting a jet or series of jets of compressed air.

16. In an apparatus of the type described, a tank, atomlzing means, a perpendicular ex aust duct communicating therewith,

through the duct by the exhaust draft, and means for returning the substance to the tank, said means consisting of a box containing a separator communicating with the exhaust duct, a pipe effecting communication between the ottom of the box and the tank, and deflecting the box.

17. In an apparatus of the type described a tank, atomizing means, a perpendicular exhaust duct communicating with the tank,

devices located within `chamber, and means for.

-through the duct by In ans for reclaiming the substance carried l means for accelerating the exhaust draft in the duct, means yfor reclaiming. the substance carried through the duct by the exhaus't draft and means for returning the substance to the tank consisting of a box containing a separator mounted upon the top of and communicating with the exhaust of the chamber onto said articles, said last Y mentioned means consisting of a device secured to the underside of the roofA of the tank and presenting surfaces inclinedydownwardly from the centre. of the chamber to points beyond the vertical peripheral planes of the articles.

19. In a machine of the type described, a tank adapted to contain a liquid atomizing means, an exhaust duct communicating with the interior of the tank,means` for accelerating the exhaust draftin the duct, and means for lreclaiming the liquid carried through the duct by the exhaust draft,

said last mentioned means consisting of a hollow receptacle having an inlet with which said exhaust duct communicates, said receptacle having an exhaust opening and abalanced cover for normally closing said opening, a separator located within said receptacle over said inlet and consisting of a perforated enclosure and a series of inclined .bailiing devices positioned within said enclosure and adapted to divide the incoming draft and direct same upwardly and outwardly and means for conducting the reclaimed liquid to the tank.

20. In a machine of the type described a tank adapted to contain a liquid atomiz- 1ng means, a vertically disposed exhaust duct communicating at its lower end with the interior of the tank at a point above the level of the liquid therein, means for accelerating the exhaust draft in the duct and means for reclaiming the liquid carried the exhaust draft, said ast mentioned means .consisting of a hollow metal box of rectangular form mounted and having with, the to opening an closing said opening, a se arator located a balanced cover for normally -upon the upper end of the exhaust duct within said box over said in et and consistz ing of a perforated rectangular enclosure.

and a series of bailiing devices positioned within said enclosure over the mlet and formmg a member of inverted pyramidal jform with star sha ed base, the apex .of in the center -of the.

the pyramid locat inlet o ening whereby the incoming draft is divi ed and deflected upwardly and' outwardly through the perforated enclosure in the box and means for conducting the reclaimedliquid to the tank.

21. In a portable machine of the tye described a tank for containing a liqui substance, means for atomizing the substance within the tank,.means for feeding articles 'to be coated with the substance through said tank, pressure Huid actuating means for driving said feeding means, an a pressure fluid supply duct communicating with said atomizing means and the 'pressure fluid actuated means. i l Y 22. In amachine of the type described a tank adapted to contain a liquid substance, means for atomizing the substance within the tank, means for feeding articles to be coated with the substance within thetank, said means'cnsstin of a pair of parallel feed rollers, means or rotating the rollers v,consisting of a pressure fluid driven motor operatively connected thereto, anda pressure fluid sup ly duct communicating with the motor and with the atomizingmeana 23. In amachine of thetype described .t

an-exhaust duet, a receptacle having an inlet o ening communicating with the exhaust uct, a baie extending across the said inlet and causing the-exhaust i'low to spread laterally into contact with the adjacent walls of the receptacle, and perforated division walls surrounding the baie and intersecting the path of the exhaust flow after it is spread.

24. In a portable machine of the type described a tank mounted upon a truck in the form of a four-wheeled buggy said tank consisting of a wooden'box-like structure of rectangular form the interior of which constitutes a chamber adapted to containa fluid substance,4 the front and rearwalls having openmgs therein one ofsaid openings being yfor the purpose of inserting: the article to be trea ted'and the other forA withdrawing the article after being treated, ilexible means for closing the openings, atomizing means located within said chamber, and a platform mounted upon the buggy adjacent the inserting opening and adapted to receive and guide the articles about to pass through the tank.

In testimony whereof I have signed my name to this specification.4

l i LEVANDER BROWN, JR.

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