US2648466A - Dry powder conditioning and dispensing means - Google Patents

Description

Aug. 11, 1953 J. w. BA UR ETAL 2,648,466 DRY POWDER CONDITIONING AND DISPENSING MEANS Filed March 18, 1949 2 Sheets-Sheet l 40 I 9 55 J7 2.6 23 4.2 [I u u $2 20 2/ Q7" I 5552 Z 4 12 6 4 Aug. 11, 1953 .1. w. BAUR ETAL 2,648,4 DRY POWDER CONDITIONING AND DISPENSING MEANS Filed March 18, 1949 2 Sheets-Sheet 2 Jnz/ekrs. 75/777 M34617 0110 6. P105.

l 'atentecl Aug. 11, 1 953 DRY POWDER CONDITIONING AND DISPENSING MEANS John W. Baur, Glen View,

and Otto G. Plos,

Cicero, Ill., assignors to Binks Manufacturing Company, Chicago, Ill

ware

., a corporation of Dela- Application March 18, 1949, Serial No. 82,256 15 Claims. (Cl. 222-193) The present invention relates to spraying devices and more particularly to means for spraying powder or powder-like material or substance, and is considered an improvement of the invention disclosed and claimed in applications for Dry Powder Sprayer filed by Eric Gustafsson et al., Ser. No. 623,516, filed October 20, 1945, now Pat- 'ent No. 2,501,047, issued March 21, 1950, and Ser. No. 748,092, filed May 14, 1948, now Patent No. 2,577,519, issued December 4, 1951. Among the objects of the invention is to provide a novel device or means for conditioning and dispensing or distributing a dry powder or powdery substance in the form of a cloud or clouds, particularly for use upon printed sheets in printing as the sheets move toward stacking or like position for preventing offset 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 of fine particles and air or the like in desired proportions or the like and maintaining the desired proportion or the like regularly, and with means for conducting of such mass with or without more air or the like to a locus of use or application or the like.

Another object of the invention is to provide such means with a novel means of distribution of the nebulated and aerated mass or particles to eifect a wide range of application over the printed sheets of difierent sizes and shapes and to supply such mass in even density at all points of application and to maintain during the time of application.

Other objects, advantages, capabilities, features, and the like are comprehended by the invention as will later appear, or as are inherently possessed by the invention.

Referring briefly to the drawings:

Fig. l is a vertical sectional view of an embodiment of the invention;

Fig. 2 is a horizontal transverse sectional view, with a part shown in plan, of the device taken in a plane represented by line 2-2 in Fig. 1 of the drawings; and,

- Fig. 3 is a transverse sectional view taken in a plane represented by line 33 in Fig. 1 of the drawings.

Referring more in detail to the drawings, the embodiment selected to illustrate the invention is shown as comprising an upright chamber I which may be of any suitable form, as cylindrical as such evenness of density 1 shown, and which may have a chamber wall 2 closed at its upper end by a cap or head 3 and a lower cap or head 4 both suitably sealed to the upper and lower ends of the chamber I by suitable sealing means 5 and 6.

The lower cap 4 has a hub or neck part I in which fits a hub portion 8 of a connector or coupling member having a threaded or like part 9 adapted for connection to a spray nozzle (not shown) or to suitable duct or like means leading to one or more spray nozzles (not shown). The connector has a nut or like portion ID by which the connector 8-9 may be turned. To the hub part 7 is connected or fixed the lower end part of a delivery duct H which extends upwardly in the chamber l and to the upper cap 3. The cap 3 has a hub portion [2 which is threaded to receive an upper end portion of a tubular coupling member !3, the latter having a collar or flange M for abutting with the hub l2 and having a threaded portion [5 engaged with the threaded upper end portion l6 of the member II.

In this way and by such means the caps 4 and 3 are held to the chamber I, the lower end of the duct ll being connected to the part 1 of the cap 4 and the upper end portion l6 connected to the hub portion #2 by way of the coupling member [3. To the cap 3 may be connected an ear or the like I! provided with a hole I8 to afford means for holding or supporting the device in operative position.

The cap 3 has an air entry chamber I9 in which is connected, as by way of screw threads, a coupling or like member 20 to which may be connected a suitable air supply duct or tube 2 I. The chamber I9 communicates with a chamber 22 the upper'portion of which has an opening in which is a closure plug 23, and beneath this plug is provided a well or the like 24 which is in communication with the chamber 22. From the well 24 runs a duct or passage 25 which is provided in the cap 3 and this duct or passage extends to and communicates with a chamber or well 26 provided in the head or cap 3. From this well 26 is provided duct 21 which establishes communication with the well 26 and a chamber 28 provided in the cap or head 3 at the upper end of the coupling or like member l3. The member I3 is provided with a passage or duct 29 leading to the lower end of the member [3, and in the lower end of the member l3, or rather the portion [5 of the member I3, is provided a socket or the like 30 in which is connected a tube or nozzle 3| which preferably is short but of sufiicient length so that its discharge orifice 32 will be beyond or below an orifice 33 provided in a side of the duct I I near its upper end portion thereof.

The chamber 26 has an upper opening in which is secured a plug or the like 34, this member having a head 35 by which the member. 34. may be connectedor disconnected as and when desired.

The member 34 has a valve passage or chamber 35 the upper end of which is threaded or the like for the securing therein of the head portion 31 of a valve member 38. To the upper end portion of: the head portion 31 is suitably connected a Winged part 39 by which the valvehead 311 and thevalve stem part 38 may be adjusted, thewing part 39 having a holding member, asa screwdll threaded into the head part 31 to hold the winged part 39 rigid with the valve part 31 33 The. stem por; tion of the valve 38 has a collar 4I on which is a coiled spring 42 pressing up against a packing, means or the like 42a on the valve stem and pressed. against thehead part 3] t thevalve 3,8, The lower portion of the v'alve'3il has a tapered va te ing'ra .3 a e to atin or v y thesi ze of an air entryorificeflld provided at. the upper end of aboupling member. or. theflike. 45 connected to and, communicating with the'lower parto r, portion 45,6 the chamber 23. The coupling 4,5,hasa nuitpartfor. the like ifter effecting connection to the part {5.

Theloyver portion of the cq lpling 45,: has. a

threadedstem petition 45;, to which is connected a coupling cap, onring 49 "for clamping theupper flangedi end 53 ofar'i air delivery tube or the like 51 'wh'cheiitends to alovver point or locus in the h mber h fl l 'am e I is m edn c'ated' an upright mixing chamber 52 having openings 53 and 54 at both ends, that is the opening. 3fat. the lowerend oi the chamber 52 and opening 54 at the, upperend of the chamber 52. This. mb m yz g s r edi e. n uitb w i 'n e m e was s h wnk' s enected in any, suitable way toe, sidejo f the air de; livery tube 5|. The connection may be adjust; able in any suitable way.

e' i b r d st 5 i as a t ow r q t pea z le pbftioh 5 h v n a di 'q ar e' or fi e. t i e ig r v axia limmest ith the opjening 53 at'thel wer end of-th'e chamber, 52 meanes ;sw a er i i a ad s e r m as below, theopenirig ,5 3, assh9 nin E g. 1, The s i je r; cross-sectional area of the chamber 52, is lar'gerth an'that of the duct part 55 n. e h mber is. wanna essi. qw r" 1 h. ji l s 9 br dl y mad me,- h l ez l P t-. r56. Oa hs. u e -i engine l we end por on f. hechamber. 52,-. renreie b y a. ow. .l v le hatw heremayv lwa s e anaspirationuor injection of the ,powdenbetween the orifices 5 6..and-.53.-.to produce a proper. propor: tion' of powder to airin the chamber..52. Since the. powder is light in weight. there can be no head at the orifices 56and 53-a s would-be in the case of using liquids and, hence, thedepthof the'powder in the chamber I has no influence on theinjecting effect ofthe air atthe'orifices 55 a i i ij "As he mixture oi powder and air flowsupwardly from the opening 5 4 'of th,e chamber 52,, themixtu're spreads in the'spacelunder theecap or; head 3 and becomes nebulat ed l, It eventually fie'ws' to and is drawn inby way of the orifige 33 in the chamber, by the aspi'rating ef fect of n jet or str eambifair beingpr ted from the nozzle 31!. whence morair is mixed and. nebulatediwith 4 the fluid mass entering the chamber I I by way of the orifice 33.

In order to enhance the mixing and nebulating efiect of the fluids in the upper portion of the chamber I, a deflecting means 58 or the like may be, provided at or near the outlet of the chamber 52. This means may be of conical or like form and having an apical opening to fit around the tube 5I and to be connected or fixed thereto in any suitable way. This provides for an'ample curved and conic portion at and near the outlet 54 of the chamber 52 so that the mixture issuing from, the, opening 54 of the chamber 52 will be deflected in various ways and directions soa stoenhancethe, mixing and nebulizing thereof by the time the fluidal mass reaches the inlet r fice. 1i thgeh I The cap 'or head 3 may have a suitable filler opening having a cap 59 by which to charge more powder into the chamber I when desired and ne s r vIn a on, a r, upder P ss r fi ws. Prater: ably. intermittently 01; by impulses, inby way. of he pa s I, 2. nd; 51 to he hambe 3 Some offthe'air. passes by way of, thepassage21 to, chamberv 28 and 'thence by way, of the duct and nozzle 3| to the chamber! II, connectort-za and thenceto the spray means, as noz lzles qr the like (not shown). The, injection ettect at the n0zzle'3I32 is to draw. in a portionof the mig ture. in chamber I by way of: the opening, 33, in the chamber I ,I. The'lorifice,3,3,is farthestaway from the opening 54 of the chamberiZ toatford a longvpath of travel and hencea greaterychange for the powder and air to be best mixed and nebulated by the time themass. enters the orifice 33, H v

The. air also is, likewiseor similarlyfed by way of the valvemeans 4,3,-.44,to andinto theduct 5I and thence to the, nozzle 56, of the duct, 51, e p w th ke of. th ai r ected. fr m the nozzle 56 will engage. a quantity of the powder or flocv inthe gap-between the nozzle 55 and the mouth 5.3 .at thelower end of .the; chamber 52, whereby. the, two are mixed and carried qhprojected up i the chamber.52 to and through itsoutlet 54, against the. coneor deflector. 53th be dispersed in thescham ber of the capf3 and to flow by way of the orifice .33, to the, duct l I.. he. ant o r ass l -b mugh henqw 3I-32 inltheupper, partof the duct I I., it,mix es with th mixture that has, entered th fqu h the orifice 3 3, and to bepropagated downelongthe duct II and thence forth to the spraying mans,

The air pressure may, be. varied but the pro; r n of ir, nd w e wi ll t m it change in air pressure, because the. relationfof the orifices 56,and 53 rerr iai n the same, (.wh en-once set). Theinjection or injector effect mayvary but the, proportion of the powder; to ..,the,,air. repv mains the same. 'A

While we have. herein described and,upon. the aw ngs s own. ars -fl d embedim n i' ik the invention, it is to be understood that the, inyen og gt m t h mb .wmpmhend eth ens mq ions. e l rra m a e ests. e t r nde e h ut.. s12atins,- r9n the spirit'of the invention.

avi h s clo ed. he. venti n we cla m:

A o d y e diti ni g. andpdispensingider. vice comprising a container having a lowe gehamr, f, P93191 21 a nina a l gmaterialinpow ei d rm; he in and; n, p er. chamber. pore qn, q ma ly bov i material i cnta nedtm a d w r; h elbes t a; we ln ss du tile;

said container and having a receiving end portion located in said upper chamber portion and above said material and a delivery end portion extending to the exterior of said container, said delivery end portion having means for connection thereto of a suitable means for spraying said powdered material, an air supply chamber member at the upper part of said container and an air supply duct extending from said supply chamber to the receiving end portion of said delivery duct for conducting air under pressure into said delivery duct at said receiving end portion thereof, a second air supply duct extending from said air supply chamber to a low point in said lower chamber portion and into said material therein and having an air nozzle at its lower end portion for delivering air in the form of a concentrated jet in said material at said point, a mixing chamber member having a lower open end portion located in said material at said point and spaced from said air nozzle for receiving powdered material and air into the chamber of said mixing chamber member, said mixing chamber member having an outlet portion located in said upper chamber portion and above said material in said lower chamber portion, said delivery duct having an orifice provided in said receiving end portion thereof for passage of said mixture of air and powdered material from said upper chamber portion to be mixed with the air passing from said air supply duct extending from said air chamber to said receiving end portion of said delivery duct to move along said delivery duct to be sprayed.

2. A device as set forth in claim 1, and wherein is provided an adjustable regulating means in said second air supply duct extending from said air supply chamber for controlling the pressure and flow of air to said air nozzle.

3. A device as set forth in claim 2, and wherein is provided a deflecting means located at the outlet of said mixing chamber member for enhancing the mixing of the air and powdered material flowing from said mixing chamber member to said upper chamber portion.

4. A device as set forth in claim 3, and wherein said deflecting means has an inclined surface located above the outlet endportion of said mixing chamber member for deflecting the mixture of said powdered material and air issuing from said mixing chamber member in diiferent direc tions into said upper chamber portion.

5. A device as set forth in claim 4, and wherein said air duct from said air chamber to said delivery duct has an air nozzle extending into the receiving end portion of said delivery duct for effecting an aspirating eifect on the mixture of powdered material and air entering through" said orifice into said delivery duct.

6. A device as set forth in claim 5, and wherein said deflecting means comprises a conical member having its apical portion connected to said second air supply duct and having its flaring skirt portion extending upwardly with a part thereof located above the upper and delivery end portion of said mixing chamber member.

7. A device as set forth in claim 6, and wherein said air nozzle at the lower end portion of said second air supply duct has a return bent portion for presenting its air delivering end portion up wardly, and said inlet end portion of said mixing chamber member being located spacedly above said air delivery end portion of said air nozzle as also in alignment therewith.

8. A device as set forth in claim 1, and wherein is provided a deflecting means located at the out- 6 let portion of said mixing chamber member for enhancing the mixing of the air and the powdered material flowing from said mixing chamber member to said upper chamber portion.

9. A device as set forth in claim 8, and wherein said deflecting means has an inclined surface located above the outlet end portion of said mixing chamber member for deflecting the mixture of powdered material and air issuing from said mixing chamber member in different directions into said upper chamber portion of said container.

10. A device as set forth in claim 1, and wherein said air duct from said air chamber to said delivery duct having an air nozzle extending into the receiving end portion of said delivery duct for effecting an aspiration effect on the mixture of powdered material and air entering through said orifice into said delivery duct.

11. A device as set forth in claim 10, and wherein said air nozzle is spaced from the wall of said delivery duct to afiord room for the mixture of material and air entering therein through said orifice.

12. A device as set forth in claim 11, and wherein said air nozzle has a delivery end extending into said delivery duct to a point beyond where said orifice in said side wall of said delivery duct is located.

13. A device as set forth in claim 1, and wherein is provided a deflecting means located at the outlet portion of said mixing chamber member for enhancing the mixing of the air and the powdered material flowing from said mixing chamber to said upper chamber portion of said container, and said deflecting means comprising a conical member having its apical portion connected to said second air duct and having its flaring skirt portion extending upwardly with a part thereof located above the upper and delivery end portion of said mixing chamber member.

14. A device as set forth in claim 1, and wherein said air nozzle at the lower end portion of said second air duct has a return bent portion for presenting its air delivery end portion to said mixing chamber member being located spacedly above said air delivery end portion of said air nozzle as also in alignment therewith.

15. A powder conditioning and dispensing device comprising a container having a lower chamber portion for containing a dry material in discrete form and an upper chamber portion for containing a mass of said dry material suspended in air, means for introducing air under pressure into said container, a delivery duct positioned in said container and extending through the upper and lower chamber portions of said container and projecting exteriorly of said container at the bottom thereof, a mixing compartment in said container having an upper end opening into the upper chamber portion and a lower end opening into the mass of dry material in the lower chamber portion, means for introducing a portion of said air under pressure into the mass of dry material in the lower chamber portion of the container, a discharge nozzle carried by said means for directing a concentrated jet of said air under pressure in company with dry material into the lower end of said mixing chamber to pass a mass of said dry material suspended in air out of the upper end of the mixing chamber to the upper chamber portion of the container, means for introducing the remaining portion of said air under pressure into the upper portion of said delivery duct, said delivery duct being provided with an opening in that portion thereof positioned in the upper chamber portion of the container through which suspended dry material from said upper chamber portion passes to be mixed with the air under pressure in said delivery duct.

JOHN W. BAUR.

OTTO G. PLOS.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 554,300 Parker Feb. 11, 1896 1,712,804 Wytcherley May 14, 1929 Number 8 Name Date Kitto -1 May 30, 1933 Roselund et a1. Aug. 24, 1937 Schanz June 7, 1938 Marr I July 12, 1938 Kennedy Mar. 3, 1942 Williams et a1 June 16,1942 Herman et a1. Dec. 7, 1942 Bennett Jan. 31, 1950 Meincke Oct. 10, 1950 Egger Nov. 21, 1950 Gustafsson Dec. 4, 1951

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