US1682407A

US1682407A - Paint-spray booth

Info

Publication number: US1682407A
Application number: US213768A
Authority: US
Inventors: Edmund H Nelson; Egon F Tingwall
Original assignee: JAMESTOWN BLOWER Co
Current assignee: JAMESTOWN BLOWER Co
Priority date: 1927-08-18
Filing date: 1927-08-18
Publication date: 1928-08-28
Anticipated expiration: 1945-08-28

Description

Aug. 28,1928. ,es2,4o7

E. H. -NELSON ETAL PAINT SPRAY BOOTH Filed Aug. 1 1927 2 Sheets-Sheet 1 mist which has failed to find Patented Aug. 28, 1928.

' UNITED sTATEs- PA'I'IENT OFFICE.

k IDIUND E NELSON AND EGON F. TINGWALL, OF JAMESTOWN, NEW YORK, ASSIGN'OBS- TO JAMESTOWN BLOWEB. COMPANY, OF JAMESTO'WN, NEW YORK, A. GOBPOMTION OI' NEW YORK.

' numeruar noo'm.

Application filed August 18; 1927. Serial No. 813368.

One of the objects' of our invention is the provision of a paint-spray booth equipped with means for efiectively drawing out paint roper lodge ment on the article being spraye and also the aint fumes which are obnoxious and healthestroying. V

Another object of our-invention is to provide means for creatin suction within'the sray booth and centre izing the suction so t at the paint mist or paint-spray failing to find lod ement on the article being sprayed, and the nmes, will be drawn out of the spraying compartment of the booth in an effective manner, from all parts thereof.

Another object of our invention is to pro vide a spraying compartment and a suction chamber and separate the two by a wall having openings provided with means adapted ,to control the 'suction within the spraying compartment.

A still further object of our invention is the provision ofa spraying booth so equipped that the usual stack or draft flue extending upwardly through the roof of the buildin containing the booth, is dispensed with, an wherein provision is made for directin the exhaust out through the side wall of the buildin. V

A sti further object of our invention is to gzovide a spray booth 'having an air chamr extending transversely. across its upper end and wherein provision is made for aiding in the exhaust the risin fumes, through the medium of-said air cham ber.

With the above and other objects in view, the invention consists in the novel features of construction and in the arrangement and combinationof parts to be hereinafter de.- scribed and more particularly pointed out in the subjoined claims.

In the drawings:

Fig. 1 is a front elevation of our improved paint-s ray booth, showingthe same' within a building partly shown in section.

Fig. 2 is a side elevation of the paint-s ray booth on a scale somewhat reduced from ig.

- 1, the same being shown within a building.

Fig. 3 is a vertical section taken 'on' line 3-3, Fig. 1.

Fig. 4 is an enlarged transverse section taken on line 4-4, Fig. 2.

Fig. 5 is a %lan view of the paint-spray booth withina uilding. i

Fig. 6 is a section taken online 6-6, Fig. 3, looking in the direction of the arrow crossing said line. e

Fig. 7 is an enlarged section taken on line 7-7, Fig. 1.

Fig. 78 is an enlarged section taken on line 8-8, Fig. 3, looking toward the left.

While we have referred to this invention as a paint-spray booth, the termpaint-spray' is understood to be used broadly so as to in-` clude varnishes and various other covering material capable of bein sprayed,:and while paint-spray booths of t e general type to which this invention belongs are invariably used within. buildings, it wil be apparent that the apparatus may be operated outside of a buildng. We referably, however, arrange the inlet and e aust parts of the apparatus -so that the l'atter can advantageously be placed within a building, with the air-inlet of th apparatus extendin into or through a wall of the building and t e exhaust extending into or through the same or another wall of the building.

So far as known, spraybooths of this kind have heretofore been provided with vertical stacks extending up through the building and exhausting through the roof, which oftentimes makes itnecessary to cut through several floors of a building. With our invention, v

of the' floor the booth may be regardless the inlet and exhaust of the appaplaced on',

- ratus extend laterally from the apparatus and are directed so as to exhaust through one or more walls of abuilding.

In the drawin i ,the

numerals

9 and 10 desgnate outer wa ls of a building', and 11 the floors thereof. The apset into a corner of one but as this is mereoor, or one of the paratus'is preferabl of the floors of a bui ding,

ly an advantageous location for the same, it

ma' be otherwise located.

he apparatus comprises a sprayng booth 12 having a spraying compartment 13, whc h has side walls 14, made to converge near ther rear ends so as to gradually restrict the transverse' dimension of the compartment alon a ortion of its depth. This compartment a so as a to wall 15 and a rear wall 16 at the paint o its greatest restriction. In this compartment, articles to be painted or otherwise coated are arranged and paint or other covering material ssuing from a sprayin nozzle of any approved type, is drecte against them. The rear wall of the spraying oompartment 13 has a number of superosed transversely-elongated openings 18 ormed therein, and these are opened to any desired extent, or completely closed, as may be found desirable, by Shutter plates 19 pivotally arranged along the upper ends of said opemngs. For this purpose, hangers 20 are Secured to the rear wall 16 of the sprayng compartment, and each of the Shutter plates 19 has pivot stud 21 at opposte ends, which are seated in said hangers. At one end, each Shutter 'plateis provided with a lug 22 to which is pivotally Secured a connecter bar 23. so connecting said Shutter plates that they move in unison and are adapted to o en the openn s in the rear wall 16 to equal egrees.

To te top wall of the spraying Compartment 13, pulleys 24 are Secured, over which an operatin cord or cable 25 is passed, said cord or cab e depending from said pulleys and having its inner depending end Secured to the Connector bar 23, as at 26. The outer depending end of said cord or cable passes through a forked retainer 27 fastened to one of the side walls 14 of the booth, and it is provided with a series of retainer collars 28, which are spaced apart, and anyone of which is adapted to be engaged with the under side of the forked retainer 27. The outer end of said cord or cable is provided with a handle 29 for Conveniently manipulatng the shutter lates. These Shutter plates g'ravitate under' t eir weight, and consequently it is only necessary to release the Operating cord or cable from the forked retainer 27 and allow said cord or cableto be moved over its co-acting pulleys under the weight of the Shutter plates 'and the Connector bar attached to the outer ends thereof. When the Shutter plates are closed to the desired degree, the retainer collar directly beneath the f orked retainer will be moved into contact with the under side of said retaiier, and thus hold said plates in adjusted position. It is, of course, apparent that the Shutter plates may be otherwise manipulated.

The use of the shutterplates in connection with the openings in the rear wall of the spraying c'ompartment, form what may be termed a louvre structure for the escape of the paint mist and fumes. Therefore, we consder it within the. scope of our invention to attach said plates in fixed relation to said rear wall, although it will be apparent that by hinging or pivotally attaching them as 'shown and described, certain advantages not otherwise attainable, are' secured. These Shutter plates may also be termed bafile'plates, since they serve to ba'file the paint mist and compel it to take an upward and rcarward course through the rear wall 16 of the spraying compartment.

In rear of the spraying compartment, a suction or ej ector chamber 30 is provided, and the rear wall of the ,spraying compartment serves as the front wall for this chamber This suction or ejector chamber has a top wall 31, which may be an extension of the top wall of the spra ing compartment, a rear wall 32 and

side wa s

33, 34; the side wall 33 being curved to merge into said rear wall and the side wall' 34 being preferably at right an les to said rear wall.

pening laterally into the suction or ejector chamber at the upper end of the side wall. 34, is an exhaust funnel 35, the inner end of which is rectangular and of considerable height, as shown at 36, F igs. 3 and 4, while the outer end thereof is cylindrical and extends thro7ugh one of the walls of the building, as at 3 Arranged outside of the .spray booth is a blower 38, the eye of which has an air-inlet tube 39 connected thereto which extends through a wall of the building, as at 40. The exhaust of this blower is designated by the numeral 41, and is tangentially dis osed in the usual manner, and it has connecte thereto an exhaust-noz'zle 42 which extends into the suction or ejector chamber 30 through the curved side wall of the same. This exhaust nozzle is dirccted toward the enlarged inner end of the exhaust fun'nel and terminates within the suction or ejector chamber approximately midway between its up er and ower ends. This nozzle may be inc uded in the term exhaust of the blower and connected to this exhaust is an-air tube 43, which extends upwardly and forwardly and is connected with an air chamber 44 disposed transversely along the upper wall of the spraying compartment at its froit end. This air chamber has an inclined inner wall in which numerous air-escape openings 45 are arranged which direct air from said chamber downwardly and inwardly into the spraying compartment.

Connecting the air tube 43 with the side wall 34 of the suction or ejector chamber 30 is an air tube 46. This air tube opens into the suction or ejector chamber in line with the exhaust funnel thereof. In the air tube 43 between the air tube 46 and the exhaust of the blower, a Valvc 47 is arranged, which.

when closed, shuts off the air current to both the air chamber 44 and the air tube 46. In the air tube 43 between the air tube 46 and the air chamber 44, a valve 48 is provided, which when closed, prcvents the air being supplied to said air chamber. In the air tube 46, a valve 49 is arranged so that this air may be shut off independent of the air tube 43. The blower is operated by means of an electric motor 50.

By gradually decreasing the width of the spraying compartnient alon its rear portion and consequently diminishng the wdth of the louvered rear wall, the suction action on the paint mist and pant fumes is such that they are concentrated in their rearward passa e through said louvered wall, with the resu t that the mist and fumes are more eficetively acted upon and brought in concentrated form into the suction or ejector chamber 30 where they encounter the high pressu-re air stream issuing from the exhaust nozzle 42 and are carried through the exhaust funnel 35.

The paint mist driven throu h the exhaust funnel encounters a shield 51 astened to the wall of the building and inclined downwardly and outwardly over` the outlet of said exhaust funnel, with the result that the mist accumulates on said shield and drips from the edge thereof onto the ground, thus preventing soiling of surroundings onto or against which the paint mist would otherwise be directed.

The operation of the device is as follows The article to be paint-sprayed, or otherwise coated, is'placed within the sprayingcompartment 13 and the paint directed thereagainst with a spraying nozzle, in the usual manner. The blower, when operated exhausts through the exhaust nozzle 42, a current of air under high pressure being directed V across the rear of the louvered wall 16 which separates the sprayng com artment 13"fron the suction or ejector cham er 30. The current of air directed from the nozzle passes out through the exh'aust funnel and by reason of this nozzle being located inrear of said rear wall, it creates suction through the openings of said rear wall and at the rear of the spraying compartment; the suction being substantia-ll even at all openings of said rear wall, or at east effective over the entire area of said 'rear wall, so that the paint-mist and fumes within the spraying compartment are drawn upwardly between theshutter or louvre plates` and carried out through the exhaust funnel by the exhaust of the blower, the mist-laden exhaust being directed against the shield 51 arranged over the outlet of said funspraying nel to prevent the spraying of surroundings with aint or other :covering material, as heren efore mentioned. r

The suction created at the rear end of the compartment causes a partial vacuum to be established, and as the front of the spraying compartment is open, there will be an inrush of air into the compartment, with the result that even though the operator is stationed within the front end of said compartment, he will not ordinarily come in contact with any of the' paint mist or fumes. But, if 'for any reason the umes appear'to be retained within the spraying compartment,

it is only necessary to open the valves 47' and 48 in the air tube 43, whereupon a current of air will be directed into the air chamber 44.

at the u per end of the spraying compartthe louvered rear wall' of said compartment and cause the fumes to be carried out into'the suction or ejector chamber 30, where the action of the main exhaust from the exhaust nozzle will carry the fumes out throu h the exhaust funnel with thepaint-mist. hould it be found that a speeding up of the exhaust is desired, the valve 49 in the air tube 46 may be opened, whe'eupon a cross current of air is directed through the upper end of the suction or ejcctor chanber, which cross current is forced directly into the exhaust funnel and accelerates the passa e of the paint-mist and fumes through said unnel.

It will be clear that upon closing the valve 48 and openin the

valves

47 and 49 this cross current'may e maintained'without directing the air into the air chamber 44. U on closin the valve 49 and having the va ves 47 and 48 open, the air may be directed into the air chamber without directing it into the suction or ejector chamber. .Upon opening all of the valves, both a cross current of air into the exhaustfunnel may be provided and also air currents directed downwardly and inwardly from the upper front end of the spraying compartment, The suction in the spraying compartment may be increased or diminished upon manipulation of the Shutter or louvre plates in the manner hereinbcfore mentioned. V Having thus described our invention,what we claim is 1. A paint-spray booth, com rising a spraying compartment having si e walls, a top wall and a rear wall provided with openngs, a sucton-nducn devce m rear of said rear wall, an air ehamber at the upper end of said spraying'compartment having a top wall,

side walls and a rear wall provided with openngs, a suction chamber n rear of sad sprayng compartment,` a sucton-nducng 4 device to create suction through the openings of said rear wall, and means to direct currents of air toward said rear wall rom the upper front portion of said spraying compa-tment.

3. A paint-spraybooth, comprising a spraying compartment and a suction chamber in rear of said compartment separated from the latter by a dividing wall provided with openings therethrough, an exhaust funnel having an enlarged inner end opening into said suction chamber along the upper portion of one of its side walls and being gradually reduced in size outwardly, a blower outside of said booth having an exhaust extending through the other side wall of said suction chamber, and an exhaust nozzle attached to said exhaust extending u wardly and inwardly therefrom toward t e enlarged inner end of said exhaust funnel, and means for Operating said blower.

4. A paint-spray booth, comprising a spraying compartment and a suction chamber separated from said spraying compartment by a wall having openings therethrough, said suction chamber having an exhaust directed laterally therefrom, an air chamber extending transverscly across the front of said sprayin'g compartment along its upper end, a blower outside of said booth havn an exhaust directed into said suction booth to cause a current of air to be directed therefrom into the exhaust of said suction chamber, and an air tube leading from the exhaust of said blower to said air chamber.

5. A paint-spray booth, comprising a spraying compartment and a suction chamberin rear of said spraying compartment and separated therefrom by a wall havin openings therethrough, an exhaust for sad suction chamber in one of its side walls, a blower outside of said booth having an exhaust nozzle extending into said suction chamber to direct a current of air across said suction chamber toward the exhaust thereof, and an air tube connected to the exhaust nozzle of said blower and leading into said suction chamber above said nozzle, said air tube being adapted to direct a current of air through said suction chauber into the exlaust of the same.

6. A paint-spray booth, comprising a spraying compartment open at its front end, a suction chamber in rear of said spra ing compartnent and separated therefrom y a dividing wall having openings therethrough, said suction chamber having an exhaust funnel opening thereinto through one of its side walls along the upper end thereof, a blower outside of said booth havin an exhaust extending into said suction cTamber through the other side wall thereof and being directed toward said exhaust funnel, an air chamber at the upper end of said spraying com artment havng air openings therethroug directed toward said dividng wall, an air tube extending from the exhaust of said blower to said air chamber, an air tube extending from said first-mentioned air tube into said suction chamber in line with the exhaust funnel thereof, and valves in said air tubes to control the passage of air therethrough.

7. A paint-spray booth having a spraying compartment and a suction chamber separated from said spraying compartment by n dividing wall having openings therethrough, an exhaust funnel extending laterall from one of the side walls of said suction c amber and being gradually restricted from said wall outwardly and terminating in a c lin- .drical outer portion, said exhaust funne extending' along the upper portion of said side wall, a blowe' Situated outside of said booth and having an exhaust provided With an exhaust nozzle cxtending` through the opposite side wall of said suction chamber at a low point thereof, said nozzle being directed up-- wardly and inwardly to cause a current of air to pass the-efrom into said exhaust funnel, and means for Operating said blower.

In testimony whereof we affix our signatures.

EDMUND H. NELSON. EGON F. TINGWALL.