US2577519A - Dry powder sprayer - Google Patents

Description

1951 E. GUSTAFSSON ET AL 5 5 9 DRY POWDER SPRAYER Filed May 14, 1947 5 Sheets-Sheet l [.Nvavrons Ee/c GusmFssa/v JOHN W 5402 A 71/500025 KERN 5W5; 4M,

Arr-Y.

Dec. 4, 1951 E. GUSTAFSSON ETAL 2,577,519

DRY POWDER SPRAYER Filed May 14. 1947 5 Sheets-Sheet 3 M W I16 832 I I /09 U0 9 [NVENTORS Emc 6us-rAFsso/v JOHN. In! BAue 774500025 KERN g m mzam ATrY.

Dec. 4, 1951 GUSTAFSSON ETAL 2,577,519

DRY POWDER SPRAYER Filed May 14, 1947 5 Sheets-Sheet 4 [N vszvrozs ERIC Gusmrasow JOHN M 5402 71 1500025 KEEN fiYafiuaL WM,

Dec. 4, 1951 E. GUSTAFSSON EI'AL.

DRY POWDER SPRAYER Filed May 14, 1947 5 Sheets-Sheet 5 fA/vEA/Toes [21c Gusrarssau Jan/v M 5.4 U2 77-IOD 0R KERN Arrv.

Patent ed Dec. 4, 1951 2,577,519 DRY POWDER SPRAYER Eric Gustafsson, John W. Baur, and Theodore Kern, Chicago, 111., assignors .to Binks Mannfaoturing Company, Chicago, 111., a corporation of Delaware The present invention relates to spraying devices and more particularly to means for spray,

ing powder or powder-like material or substanfifi.

Among the objects of the invention to pro vide a novel device or means for distributing a dry powder or powdery substance in the form of a cloud or clouds, particularly for use upon; printed sheets in printing as they are moved toward stacking or like position to prevent oliset of ink, colors, and the like; comprising a chamber, container or holder, made of any suitable material, but preferably of transparent or like material, for holding the substance, with means for projecting a fluid, such as air, against or into such substance to nebulate or form a homogeneous fiuidal and aerated mass ofv fine particles and air or the like, and with means for conducting such mass with or without more air or the like tda locus of use or application or the like. I Another object of the inventionis to provide such means with a novel means of 'distribution of the nebulated and aerated mass or particles to efiect a wide range of application over the printed sheets of different sizes and shapes, which means is preferably adjustable for such purposes.

A still further object of the invention is to provide a novel cover means which carries as a unit the air passages, the air nozzles, the filler means, and the control valves for the passage of air to the powder chamber.

A further object of the invention is to provide novel means for efi'ecting the fluid impulses for the nebulating and aerating of the substance, directly and proximately to the mass of material to be nebulated and aerated, as also to likewise efiect the delivery of the nebulated and aerated cloud or clouds of the particles to the locus of application.

Another object of the invention is to provide novel means for more evenly applying the fluid impulses to the mass to be nebulated and aerated.

A still further object is to provide a novel def vice with means for facilitating the adding or replenishing of more material to the device with: out dismantling the device.

Another object of the invention is to provide a novel assembly of the parts. 1

Other objects, advantages, capabilities, tea tures, and the likeare comprehended by the in yention as will later appear, or as are'inherently possessed by the invention.

Referring briefly to the drawings: Fig. 1 is a view in elevation of an assembly emf bodying the invention;

Fig. 2 is a top planview of the same;

Fig. 3 is a vertical sectional view, on an e larged scale, of the device;

Fig. 4 is a horizontal sectional view taken, in a' plane represented by line 4-4 inFig. 301 the drawings;

Application May-14,- 1947, Serial No. 748,092

9 claims." (01. 91-45)} Fi 5 is airagm ntary sectional vi w taken in.

a. plan r presented by line 5- in i 3 f the drawings; Fi 6 a part e evati nal. d par se tiona vi w of an adjustable dis ri ut n po t on of the device;

Fig, 7 is a sectional view taken in a plane represented by line 'l-.-:l, in Fig. 6 of the drawings; F 8.1 v a agme ert al onal i w on enlarged scale, of a control feature shown. v .e.-i;,-... Y

Fig, 9 is asimilar view of another control feature shown in Fig. 3; Fig. 10 is a part sectional view of the holder and air delivery,v mean floa n im he. materi in the holder; Figs. 1 1 ,12 and 13 are, plan views of; alternate, ,form o .tbefioat means, v 11 as c i nal view si i art t at shown E g- 4,. .Qnasma1le ale. of an ter a form Qtdevice;

1 is an elevationalviewof-an alternate form of adjustable distributing portion of thede vice, comparative to that. shown in Figs. 1 and 6; Fig. l6- is a top plan view of the distributive part of thedevice-shown in Fig. 15;. Fig. 17 isa part sectional view taken in a plane represented by line 11-1! in Fig 16 of thedraw mas; a Fig. 18 is-aifragmentary sectional view of an air supply nozzle part alternative to that shown in Fig. 3. v 1 Referring more in detail. to the drawings, the embodiments chosen to illustrate the invention comprises a, container, holder or chamber .51, which can be made of any suitable material, preferably of transparent material, such as a synthetic or plastic material through which the material and the parts-inside the holder or chamber 5! may be easily seen. The chamber or container 5| comprise an upper chamber portion com.- rised n a p. ap o cover 2 i g a l p. flan or 1 1111.53 se F g. 3) for fittin wi h a sealing at to a. neck, flan e or rim po tion .54 of the lower or bowl like chamber portion 5.5 of the chamber holder 5L As shown the bowl. portion 55 is tapered generally downwardly as .wellas ing 6.3, as by way of, a hub 64. The relative linear adjustment of the telescopic tubes GI and 62 is 00 fixed by a suitable clamping means 65 (see Figs.

' 3 i and 2) The box or housing 83 is supported on and connected to the upper end of the hollow post 65, as by way of a hub Bl, the post being suitably associated with a printing press or the like (not shown).

Extending through the telescopic tube means 6I62 i a flexible air delivery tube 88 which is coupled at an end thereof by way of a suitable coupling means 69 which is in turn coupled to a coupling member 10 (see Fig. 3) secured, as threaded, to a threaded socket portion II of the cap 52 (see Fig. 3), and with the other portion of the tube 68 extending through the tube 6I62 to the box 53 in which the tube 68 is reeled on a suitable let-oil and take-up means (not shown) in the box 63, and thence connected, as by way of the post GIi, to a suitable air compressing means associated with the press, (not shown).

The coupling I has a passage 12 for delivery of compressed air to a chamber I3 of the socket portion II, and this chamber I3 has a passage I4 leading to a passage 15 which in turn leads to a valve chamber 16, all formed with and provided in the cap 52 (see Figs. 3 and 8). In the valve chamber I6 is a valve seat 'I'I surrounding a valve chamber outlet passage or chamber I8 and in the wall of the chamber I8 is an outlet port I9 in communication with an air passage 80 (see Fig. 4) leading to a valve chamber 8|.

Referring to Fig. 14, in lieu of running an air passage 80 from the chamber I8 to the valve chamber 8|, a more direct and shorter passage 80* is run from the chamber 18 to a central recess or chamber II (later described) and from this recess or chamber I I5 is run an air passage IIG', which serves the same purpose of supplying air or air impulses to the chamber 8|, in lieu of by way of thpa'ssage 80 as shown in Fig. 4.

able packing means I04 held pressed by a s ring ing portion IIO of the valve 99. As shown in Fig.

At the chamber 16 the cap 52 has a hub portion 82 having an annular valve seat 83 on which is supported the border of a diaphragm type of valve 84. The hub 82 is threaded to receive a hollow nut 85 having an annular seating portion 86 (see Fig. 8) for pressing against a pressure ring 81 which seats on the border portion of the diaphragm 84, thus sealingly holding the parts in place.

The nut 85 i threaded to adjustably receive an adjusting nut 88 having a head 89 for digital engagement when adjusting the nut 88. The nut 88 may be held in adjusted relation by way of the 'locknut 90 threaded to the nut 88v and engageable with the top of the nut 85 (see Fig. 8). In the nut 88 is a chamber 9| in which is slideable the stem 92 of a valve follower or valve pressure head 93, and the nut 88 also has a spring chamber 94 in which is an end portion of the spring 95, the other end portion of this spring being pressed against the valve follower or head 93, as shown in Fig. 8.

The cap 52 also has a. hub portion 96 in which the chamber 8| is provided, and this hub 98 is threaded to receive a'valve control means comprising a'pl-ug 9'! threaded in the hub 96 (see Fig. 9). In this plug 91 is threadedly engaged a threaded stem portion 98 of a valve 99. At the upper end of the stem 98 is connected a finger piece I00 held in operative relation to the stem 98 by a set screw IOI or the like, whereby the open ing of the valve 99 may be adjusted by a digital .turning of the piece I00 and the consequent adjusting of the threaded part of the stem 98 in the plug 91. The plug 91 has a recess or chamber I02 through which extends a reduced portion I03 of 3 the nozzle I08: is fixed to the connector I08 and is straight to direct air impulses downwardly against the powder H3 in the chamber 5| so as to stir up a cloud of dust or powder and to cause it to be nebulated and aerated. With some kinds of dust the direct downward projection of the air impulses from the nozzle I08- may cause the forming of a deep recess orv well in the powder mass. Hence, it is desirable, in such cases, to provide a nozzle such as I08 shown in Fig. 18. In this case the upper end portion I08 of the nozzle I08 turnably fits in a socketed part of the nozzle connector I08 so that the lower portion I08 'of the nozzle I08 is bent to take different angular positions as shown by way of illustration, in full and dotted line positions in Fig. 18, so that the air impulses may be directed toward different portions of the surface of the powder H3 in the chamber 5| as also with a more or less horizontal component of direction-of thrust of the air impulses, whereby there is a better stirring up and a more widely distribution of the disturbed powder or powder particles, and also an avoidance or the formation of a hole or pit or pocket in the powdermass. a

The cap or cover 52 also has a filler hub or the V her or holder'5l with more powder" I I3' 9. simple removing of the cap H2 is all thatis necessary for the pouring in or adding of some more powder, after which the cap II2 may be closed.

At the central portion of the cap 52 is provided a threaded hub II4 having a recess'or chamber II5 communicating by way of a passage 6' leading to the valve chamber 8|, and in the case of the form shown in Fig. 14, also communication with the passage 80 leading to the valve chamber I8. In the hub I is connected the shank portion III of an air nozzle II8, the shank II'I having a nut portion II9 for screwing the shank III home (see Fig. 3 The shank portion III also has a portion I H to which is threadedly engaged the upper or inner end of a mixing chamber I20, the latter extending down or away and having a hub portion I2| fitting closely in a hub portion I22 at the lower end or remote'portion oi the holder 5 I. See Fig. 3. The part I2 I has a nut or like part I23 adapted to turn the parts I20 and I2I and also abut the hub I22. The lower or outer portion I24 of the hub I2I' is threaded to receive a coupling member I25 for the holding on of a spray nozzle head, tip or the.like |26 which may have any suitable spray orifices or the like I21.

At the upper or inner end portion of the mixing chamber I20 is provided one or more orifices I28 through which air and powder particles may be entrained and pass into the annular chamber I29. The lower or outer end of the air nozzle H8 is quite remote from the orifices I28, and is provided with an outlet or orifice I30 so as to project therethrough a jet of air so as to act with an aspirating effect on the mixture of air and powder. p s in down or along the chamber I29 the stem 98, and in this recess I02 is locatedsuitto the nozzle I26.

When assembling, the bowl part or chamber '55 and the cover 52 are located with the flanges 53 and 54 together and the assembly I20-I2I-I23 is inserted through the hub I22 for the threaded upper or inner end of the chamber I20 to engage with the threaded part I Il of the shank I I1, and by turning the same by way of the nut I23 the parts are screwed home and the flanged parts 53 and 54 are held in sealed condition.

In operation, air under pressure is supplied by way of the air delivery tube 68 to the valve chamber I6. When the pressure rises to the point sufficient to overcome the force of the spring 95, the. valve diaphragm 84 will raise suddenly from its seat 11 and permit a charge of air under pressure to pass, as an impulse, through the passages 18 and 80 to the chamber 8|, or through the passages I8 and BI] to the chamber '5, and also by way of the passage II6 to the chamber 8|, and, in the case of Figs. 3 and 4, thence by way of the passages I I6, I I5 and H3, and in the case of Fig. 14, thence by way of the passages H5 and II8t0 be ejected by way of the orifice I30 to aspirate air and powder in the chamber I29 and to project the resultant mass by way of the nozzle I26-I2'I; and at the same time some of the air charge will pass through the valve I09I I and nozzle I08 or I08 to. project puffs or charges ,of, compressed air against the powder 3 to cause the same to be stirred up and form a cloud or clouds of the dust orparticles and the air, which will; pass through the orifice or orifices I28 into the chamber I29 and be drawn by and with the air jet projected from the orifice I30. The pressure of the air charges is regulated by adjusting the pressure on the spring 95, and the density or intensity of the powder content in the mixture of air and powder in the chamber55 of the holder I and in the chamber I29 is regulated by adjusting the valve I09--I I0. Any desired result may be obtained by simply those two adjustments.

In use, a single spray nozzle I26, as shown in Fig. 3, may be sufiicient whenspraying a small printed sheet, but when larger sheets are bein printed the nozzle arrangement as shown by way of illustration in Figs. 1, 2, 6, l5 and 16 may be used. Such arrangement is shown as comprising a header I3I or I3I adapted to be coupled to the nozzle hub I24 by way of the coupling member I25 or the header I3I. Connected to this header I3I or I3 I are two or more ducts I32 or HP, as desired. The ducts I32 have nozzle heads I33 of suitable form and provided with threaded portions I34 which correspond to the part I24 of the showing made in Fig. 3. Hence, if the spread of the arms I32 is suflicient for spraying on the sheets of a size being printed, it is then only necessary to attach the nozzle tips I26 and the couplings I25, by abutting the nozzle tips I26 to the ends of the parts I34, and screwing home the couplings I25 on the threaded parts I34.

In the case of Figs. 15 and 16, the ducts-I32, which are curved for affording a minimum resistance of passage of the impulsed mixture of air and material, are connected to ducts I36, also likewise curved for like reasons, by way of swivel type of coupling means I60, and the outer ends of the ducts I36 have connected thereto spray nozzles or nozzle heads I6 I.

Referring to Figs. 1, 2 and 6, for use with large or larger printed sheets, adjustable tube arms I36 may be connected to the parts I33--I 34, such as arms I36 comprising tapered or telescopic connector parts I31 adapted to fit into corresponding parts I38 of the parts I33, so that the part I31 may rotate in the part I38 and still be in sealing contact. The parts I3'I are connected to an end of the tubes I36 and carry union or coupling members. I39 threaded to engage the parts I34 and also to compress springs I40 carried in them and between the part I31 and a flange part I of the part I39. See Fig. 6. The free ends of the tubes I36 carry nozzle parts I42 threaded to receive the couplings I25 for holding the nozzle parts I26 in abutment thereto, as in the case shown in Fig. 3'. Hence, the arms I36 may be angularly adjusted to cover any area of printed sheets :desired. The arm parts I32 may also be angularlyadjusted in the header I3I.

Referring to Figs 15, 16 and 17, the arms I32 and I36 are swivelly jointed or joined by way of the coupling means I60. This means comprises a threaded part I62 in which fits an end portion I32 of the duct arm I32, and thread to the part I62 is a connector I63 in which extends an end portion I36 of the duct arm I36 and which portion I36! turns orswivels when adjustns thesposition oiithe arms I32 and I35. In the member I63 s. provided suitable packing or sealing means I64 and a spring I65 for holdin the-packing or sealing means I64 in sealing conditio h arm 3 y a so. if desired, turn onnectio .31".

spray nozzles I 6I at the outer ends of the arms I36 be oi similar structure to that shown 6, and wherein the nozzle I6I may be connected to an end part I42 fixed to the end of thearm-I36, and suitably threaded to receive e l nsri 25- Referringto Figs. 10, 11, 12 and 13, on the powder H3 in the chamber 55 are shown a sort of float means I43, I44, I45, in the general form of hollow ringsor the like, each having an inlet tube or neck I46 to which is connected a flexible tube I41 (see Fig. 10) the other end of the tube I41 being connected to the delivery end of the air nozzle I08 or, I08 (see Figs. 3 and 18).

Referring to Figs. 10 and 11, the float I43 is shown of annular form so that it can spacedly surround the member I20 and rest upon the powder H3, and it has a chamber I48 in which the air charges from the nozzle I08 or I08 and tube I41 are. supplied. At'the upper portions of the outer and inner walls I49 and I50 of the member I43 are provided a plurality of downwardly directed and outwardly inclined air jet nozzles or noses I5I and I52 through which air .may be impelled to be-projected against the powder H3, at distributive points, to evenly stir up the powder was to nebulate it and aerate it with the air, and also to effect reaction forces so as to maintain the member I43 at the surface of the powder mass, as in a floating condition, so as to counteract the tendency of submerging the member I43, especially when fresh powder is added tothe chamber 55 by way of the filler hub III from time'to time. The members I 43, I44 and I45'are preferably made or composed of lightweight material, such as a synthetic, plastic or likemateriaLand also may be transparent if desired.

The-form shown in Fig. 12 is of a more or less tortuous form and having outer and inner air jet nozzlesor noses I53 and I54 corresponding to the noses-I5I and I52 shown in Fig. 10.

The form shown in Fig. 13 is of generally annular form and also has inwardly extending chamber portions or lobes I55, as shown in Fig. 13, and these lobes have at the sides thereof and near the top thereof air jet nozzles or noses I56 7 corresponding to the noses I52 and I54 shown in Figs. 10, 11 and 12. The chamber I45 also has outer noses I51 corresponding to outer noses I 5! and (53 shown in Figs. 10, 11 and 12.

While we have herein described and upon the drawings shown illustrative embodiments of our invention, it is to be understood that the invention is not limited thereto but comprehends other constructions, details, arrangements of parts, features, and the like without departing from the spirit of the invention.

Having thus disclosed the invention, we claim:

1. In a device for spraying a dry powder material, comprising a holder having a hollow body portion providing a chamber portion for normally .holding the dry powder material and a cover portion also having a hollow portion providing a chamber portion above the said chamber portion in said hollow body portion, both said body portion and said cover portion having mutually engageable closing parts for uniting said chamber portions, a connecting means connected at its lower end to the lower portion of said first mentioned chamber portion of said body portion and extending upwardly in both said chamber portions and connected at its upper end to said cover portion for holding said body portion and said cover portion in mutually closed condition, said cover portion having an air passage provided with an air inlet and an air outlet means extending in said chamber portions provided between said body portion and said cover portion, said connecting means having a passage provided with an inlet means at its upper end portion for communicating with said air passage provided in said 3 cover portion, and said connecting means having an outlet means at its lower end portion, said connecting means having a passage at an upper portion thereof for powdered material and air to pass from the upper portion of said chamber portions into said passage in said connecting means, and a spray means connected to said lower end portion of said connecting means and communicating with said passage in said connecting means and extending outside of the chamber portion of said body portion.

2. A device as set forth in claim 1, and wherein said air passage in said cover portion has a nozzle extending into said chamber portions and above said powder therein for projecting air against said powder in said first chamber portion and to stir up and mix with some of said powder for said mixture to pass into the passage provided at the upper portion of said connecting means.

3. A device as set forth in claim 2, and wherein said air passage in said cover has a valve means for controlling and regulating the passage of air from said air passage in said cover portion and to said nozzle extending into said chamber portions.

4. A device as set forth in claim 3, and wherein is provided an air-pressure control valve in said air inlet of said air passage provided in said I cover portion.

' chamber portion, said body portion and said eating with said passage in said connecting means, said cover portion having an air passage therein with said air passage provided with an air discharge means located in the upper portion of said chamber for supplying air to the powdery material located in said first mentioned chamber portion for producing a cloud of powdery material in said chamber portionsto flow to said openings in the upper portion of said connecting means and to said passage in said connecting means.

6. A device as set forth in claim 5, and wherein said passage in said cover portion has a passage portion extending to and connected to the passage in said connecting means at said upper portion thereof. I

7 -A device as set forth in claimfi, and wherein said cover portion hasan airdischarge means located in the upper portion of said chamber for supplying air to saidpowdery material, and comprises an air distributing means floating on the powdery material in said holder, and an air .duct connected to said floating means and to said air discharge means.

8. A device as set forth in claim 7, and wherein said floating air distributing means has downwardly directed air distributing nozzles for projecting jet of air against said powdery material in said holder.

9. A device as set forth in claim 7, and wherein said floating air distributing meansis of extended form for extending over said powdery material in said holder and' around said connecting means.

ERIC GUSTAFSSON. JOHN W. BAUR. THEODORE KERN.

REFERENCES CITED UNITED STATES PATENTS Number Name Date 1,054,775 Hull Mar. 4, 1913 1,338,242 Moise Apr. 2'7, 1920 1,510,761 Burman Oct. 7, 1924 2,029,408 Bramsen et al Feb. 4, 1936 2,048,912 Ziska et a1 July 28, 1936 2,076,414 Panagopoulos Apr. 6, 1937 2,091,055 .Ros'elund et a1. Aug. 24, 1937 2,120,003 Schanz June 7, 1938 2,123,537 Marr. July 12, 1938 2,264,108 Anderson et al Nov. 5, 1941 2,264,523 Gustaflson et a1. Dec. 2. 1941 2,274,708 Kennedy Mar. 3, 1942 2,286,776 Williams et a1. June 16, 1942 2,303,458 Hermann et al Dec. 1, 1942 2,342,757 Roser Feb. 29, 1944 2,375,766 Britcher May 15, 1945

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