US1070428A - Automatic article-coating machine. - Google Patents

Description

T. A. DE VILBISS. AUTOMATIC ARTICLE coATING MACHINE. APPLICATION FILED AUG. 19, 1912.

Patented Aug. 19, 1913.

WJTNESEEE' ,Fig 7 @MTM/ T. A. DE VILBISS. AUTOMATIG ARTICLE GOATING MACHINE.

APPLICATION FILED AUG. 19, 1912. LUZAQB. Patented Aug, 19, 1913.

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T. A. DE VILBISS.

AUTOMATIC ARTICLE COATING MACHINE. APPLIOATION FILED AUG. 19, 1912.

LWQQS, v Patented Aug-19,1913.

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.THOMAS A.; DE VIL-BISS, OF -TOLEIDO, OHIO.

AUTOMATIC ARTICLE-Centrino MACHINE.

' specification of Letters Patent.

' Patented Aug. 199, 1913.

I Application filed August 19, 19N. Serial No. 715,81l.

To ad whom t indy/concern:

Be it known that l, THOMAS A. DE Vn.-

Brss, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have invented a cert-ain. new and useful Automatic Article-Coating Machine; and l dohereby declare the fol-- lowing to be afull, clear, and exact description of the invention, 4such as will enable others ,skilled in the art to which it appertains to make and 'use the samereference being had to the 'accompanying drawings, and to the characters of reference marked thereon, which forma part of this specification.

My invention relates to surface coating apparatus, and has for its object the provision of an improved. apparat-usci this` character, which ,is automatically` voperable to successively move articles into surface coating position, apply a surface coating material thereto, and then move them `from-such :position.

A further object of the invention' is the l.

provision in'connectionv with an air brush, of fluid pressure operated means for controlling the opening and closing of the fluid and liquid valves thereofa whereby to enhance the practicability and commercial value of such apparatus.-

The invention is fully described in the 'fol-l lowing specification, and while, in its broader aspect it is capable of embodiment in numerous forms, a preferred embodimentthereof is illustrated in the accompanying drawings, in which,--

Figure 1 is an elevation oi? a machine em-v bodying the invention, vwith parts broken away. Fig. 2 is atop plan View fthereot' with parts brolren`a`way. Fig. 3 is a topI plan view. of a portion of the driving mechanism. Fig. -t is an enlarged sectional detail of the air valve and control parts. Fig. 5 is an enlarged sectional detail of a form of airbrush used in connection with the machine. F ig. 6 is a side elevation oone of the parts which guide the' vertical swinging movements of the work moving'arms, and Fig. Y

is a cross-section of the cam-shaft with the Cams thereon.

Referringto the drawings, .1 designates a frametop or tablewhich is supported by legs 2 and has 'at hollow standardv 3 mounted thereon. A rotary work-supporting tabled is mounted loosely upon the top Iof the standard 3 and has anannu-la'r .lange' depending.

from its underside and loosely encircling the cylindrical upper'end portion ot the standard which vforms a journal therefor. rlhe lower edge of the table -tlange rests u' on anti-friction rollers 6, which are mounte in suitable brackets on an annular ledge or ange on the standard, thus supporting the table for free rotary movements. rllhe table e is provided with a central opening 8, which is'coneentric to theange 5, and` has its top surface preferably formed with a series of spaced radial ribs 49 upon which an article rests when `being coated.

Thetable flange 5 has an annular series of teeth, which form a gear 10, and this gear meshes with and is driven "by a gear 11v that is mounted on a vertical shaft 12 at o-ne side .of the standard 3. The shaft 12 is jour- `ally 'from the standard 3 -and in a bearing in the frame top or table l, below which latter it projects, and carries a bevel-gear 14; on :its flower end'in Imesh -witha loose bevelgear 15 cna-horizontal shaft 16. The shaft 16 .is journaled in hearing-arms -17 depending :tro-m the under side of the .table '1, and carries a'wor'm-wheel 18, which meshes with a worm 19 on Vladrive-shaft 20, that is journaled in' the lower end portion of the adljacent :bearing-arm 17, and may haverota- .tion communicated thereto from any suitable source of power as desired.

.A pair of vertical rocker-shafts21,21 are I 4journaled in the frame top ortable l and in respective bearing- arms 22, 22, projecting laterally from the standard 3, and have their .upper ends each `provided with a forked head 23.. Work feeding .arms or levers 24, 24 are ulcrumed to one 'furcation ot .eachlhead 2 3 of the respective shafts-21, 21', as shown lat ,25, -to'r Ahorizontal swinging movements therewith, when rocked, and torvert-ical swinging movements relative thereto, for the purpose hereinafter described. The other or inner` Vfurcation of each head serves merely as a stop or rest for limiting the downward swinging movements oi' the associated work feeding arm as shown, and'has :an upwardly projecting lug 23^for cooperating withfthe arm tulcrum to brace the arm during its work feeding movements.

The lower end of one off the shatts21, 21', the tor-nier, in the Ypresent instance, isprovided loe-low the frame top 1 with `an arm. 26,

' which'is connected by a rodf27'to a crankarm 128 'on xashaft '29-in sneh manner as to cause rocking movementsto be imparted to the shaft 21 from a revolution of such crank-arm. The shaft 29y isjournaled at -right angles to the shaft 16 in bearing-arms 30, which hang from the frame table 'bottom, and carries a large bevel-gear 31 1n mesh with a smaller bevel-gear 32 on the shaft 16. The rock-shafts 21, 21 have arms 33 of equal length projecting therefrom and connected by a rod 34 -to cause the shafts to have like rocking movements in unison when the one which is connected to the shaft 29 is rocked.

A work supporting platform or slideway 35 is disposed in thesurface plane of the rotary table 4, which latter is disposed in an opening therein, and the rear arm 24 is intended, when swung forward, to move a work-piece 36, which may be a pail, can or other container or article, onto the table 4 in centered position relative to its opening 8, while the forwardarm 24 isintend'ed, when swung forward, to move a coated article from the table 4 to carrying-away position or onto a suitable conveyer means, not shown. ln order to cause the rocker- arms 24, 24 to have their rearward or return movements in a plane which is elevated from the plane of their .forward movements to enable them to pass overcand then down at the rear of the respective workpieces to be next moved thereby, a suitable guide means is provided for imparting the requisite verand connecting this by a rod 38 to the outer i end of a subjacent lever 39, which is fulcrumed for vertical rocking movements to the associated rock-shaft 21, 21, and has its inner end provided with a roller 40that travels in a guide-member 41, mounted on the frame-table l. This member has lower and upper segmental horizontal flanges 41a and 41 forming trackson which the roller 40 of the association lever 39 has reverse directions of movement, as indicated by the arrows in Fig. 6. The endsof the upper track terminate short of the respective ends of the lower track and the forward end of the upper track, or that upon which the roller moves from the lower track, is provided with a hinged part 41c which has its free end resting loosely by gravity upon the lower track and inclines rearward therefrom to the top surface of the upper track. As the roller moves forward on the lower track it raises the part 41c to permit its passage thereunder, and upon its return or rearward movement travels up said part to the upper track 41b and thence rearward thereon, thus Lof/deas effecting a rocking of the lever 39 and a consequent elevating of the connected arm 24, 24', which elevated position is maintained during substantially the complete rearward stroke of the arm. When the workfeeding arm has approximatelyreached the limit of its rearward stroke the roller 4() passes over the rear end of the track 41b and is guided to the lower track 41a by an inclined flange 41 which projects in the path of its movements from the vmember 41, thus lowering the associated work-feedingarm to the rear of the piece offwork which it is intended to move forward on its forward stroke. |lShe movements of the lever 37 are steadied by a dash-pot connection 39 between its outer end and the head 23.

The means employed for coating the work 'pieces with any suitable coating substance, .as paint, varnish, lacquer. bronze. or the like, consists in the provision of a'pluralit-'y of air-brushes, one of .which is designated A, and is shown as being mounted on a standard or suitable support at one side of the worksupporting'table 4 and suitably adjusted. to direct its discharge against the outer side of a work-piece mounted on said table. while another of such ir-brushes which is designated B, is shown as being mounted in a suitable support within th-e hollow standard 8 and suitably adjusted to direct its discharge up into a work-piece which is mounted on the table 4 to effect a coating of the interior thereof when revolved.

yVihile any suitable form' of air-brush may 'be used in connection with myv machine. lf

preferably employ airbrushes Similar to the jected forward therein. A spring 47, which is mounted in a cage at the' rear end of the barrel, actson theA plunger 45 to in'- fluence its forward movements, and the rearward movements of the plunger are limited by an adjusting screw 48. The interior of the air nozzle 44 has communication through a passage 49 with a valvechamber 50. which has communication with a suitable source of air pressure supply and has a normally closed valve 51 therein. The barrel 42 is carried by a block 52 to which is fulcrumed a lever 53, as at 54, the short arm of such lever being connected a bar 55' to the stem of the air valve 51,v andialso being connectedl by a bar 56 to u newness ing slots in the barrel, whereby a vrearward movement of the lower arm, of the lever 53 will impart opening movements to both the-air valve 51 and the liquid nozzle closing stem or valve 46. JThe `point of connection of the bar 56 to `the lever 53 is preferably more remote from its ulcrum than the point of `connection of the bar 55 thereto in order to cause the valve 46 to have a greater opening movementl than the valve v 51. For a more complete description of the construction and operation of an air brush ott-his class lreference is made to United States Letters Patent No. 1,045,266, dated November 26, 1912. In order that the control lever 53 may be automatically operated to open the valves 46 and 51 at proper intervals, I connect the lower end of such lever through the medium of a link 58 to a plunger 59, which works in a cylinder 60 that is car` ried at the lower end of the block 52, air under 4pressure being admitted through a nipple 61 to the end of the cylinder which Y is opposite to that from which the link 55 projects. vUpon the admissionof duid pressure to the y-closed end of thedcylinder the plunger 59 is. moved in a direction to impart a valve opening movement to the lever 53, and upon the release of such pressure from the inner end of the plunger the springs, which normally act to seat the Avalves 46 and 51, cause a return of the valve controlling: parts to normal position.

The air-brush A of the machine, which is intended to apply a coatingmaterial to the external Surface of a work-piece on the table `4, is attached by a clamp 62 to a hollow .standard 63, which rises from a side of the, frame top l and has a cross-tube 64 mounted on its upper end with its interior in comals.

munication with the interior of the -standard 63. Air or other air-brush actuatmg fluid is supplied to the standard 63 as hereinafter" described andthrough it to the cross-piece A 64, and thence through a tube 65 to the airvalve chamber 50 ofthe instrument, and also through a tube 66 and nipple 61, to which it attaches, tothe interior of the cylinder 6() of the instrument. Paint, varnish or other surface coating matter, whether of a liquid or powderyy nature, may be applied to the interior of the brush barrel' 42 through a tube 67, which loads from any suitable source of supply and attaches to a nipple 42 on the barrel 42. The cross-piece 64 is shown as being provided with a plurality of valved nipples 68 to which the tubes 65and 66 may be attached :tor connecting the supply tube 64 to any desired number oi' spraying instruy ments, as the size or nature of the worlrn'to he coated may require the use of a plurallty of air brushes in order to coat the entlre exthe standard 4, has its `clamp 62 attached to a cross-,bar 71, which is attached at its ends to opposite sides of Said standard and has its air-supply tubes and 66 attached to a tube 72, which branches from a tube 73 that leads to and feeds air to the standard 63. The surface-coating supply-tube 67 of the brush B leads from any suitablesource of supply. The tube 73 attaches to a valve chamber 74 which is supported above the frame top 1by a hollow standard 75 that is mounted thereon and has communication through a supply pipe 76 with any suitable source of fluid pressure 'su ly. rlhe ,valve chamber 74 has a valve (see Fig. 4), which. normally seats therein to close the communication between the supply pipe 76 and the outletV pipe 73, and also has a valve 78, which is normally seated to close communication between the` interior of said chamber and the atmosphere through an eX- haust passage 79. The stems of the valves 7 7u and 78 project downward through the bottom walls of the chamber 74 and into the interior of the standard with their lower ends in respective register with the vertically movable push- rods 80 and 81. These push-rods work through bearings in the .frame top 1 andare provided above such bearings with shoulders 82 for limiting their lowering movements therein. Upon a raising of the push-rods they act against the lower ends of the respective-.Valve stems to edectan unseating of the valves against the fseating induence of the valve bearings 83.

rlhe means employed for vimparting properly timed valvev opening movements to the push-rods 8O and 81 comprises, in the present instance, a pair of cam disks 8.4 and 85,

which are vfixed to the shaft 29 and upon which rollers 8 6 work and communicate movements through their carrying arms 87 to the respective push-rods below which they are located. The roller carrying arms 87 are pivoted to ystuds 88, which project downward from the under side of the frame top 1 at o-ne side of saidpush-rods, as shown in Fig. 7 The peripherally raised portions 84 and of theJ respective disks 84 and 85 are so relatively arranged vand proportioned that the disk 84 acts to unseat the valve 77 to permit the passage-ot air under pressure from the supply pipe 76 to the pipe`7 3 and its connections with the air controlled parts rae of the respective air brushes, whereby to ac.- tuate the plungers 59'thereof to open their valves 46 and 51 and to discharge air through the air nozzles 43, thereof during a rearward swinging movement of -the yvork feeding arms 24 and 24, 'while the disk 85 acts to, unseat the valve 7 8 u on a closing of the valve 77 and during the orward or feeding strokes of the arms 2 4 and 24 to cause a stopping of the spraying action of the brushes. The shaft 29 also carries a cammember 89 upon the cam side of which a roller 90 that is carried at one end of a bell crank lever 91 works, said lever being fuly@ crumed to a bearing arm 92 depending from the under side of the frame top 1.A and having its other end in loose forked'engagement with the Shiftable member of a friction clutch 913. The shiftable member of the clutch is feathered to the shaft 16. and is normally held in frictional engagement with its companion on the loose bevel'gear 15 by the action of the spring 94. The rotary work supporting table 4 and the shaft 29 are so 2@ geared to the common drive means that the table 4 is caused to make two revolutions to each revolution of the shaft 29. In order to cause the table to stand stationary during one-half of a revolution of the shaft 29 or 3g during the period ofthe forward work feeding'movements of the arms 24, 24 the cam 89 is providedy on a side thereof with which the roller 90 coacts with a semi-circular lateraily projected portion which, when the 3g roller 9.(1 is traveling thereon, moves the lever 91 and shiftable member of the clutch 93 to released position against the tension of the spring 94. t is thus apparent that the work supporting table 4 has complete revoe@ lutions intermittently communicated thereto,

with its periods of rest substantially equal in len th to the period of revolution so thaty the ta le stands at rest during 'the forward work feeding movements ofthe arms 24, 24

gg and rotates during the rearward or return movements of such arms.

The operation' of my invention is as follows: The drive shaft 2() being set in motion, rotation is communicated to the-shaft 59 16 and through it and the gears 31 and 32 to the shaft 29. At each revolution of the shaft 29 the work feeding arms 24 and 24 are swung forward, the former to move a work-piece 36 to coating position upon the e rotary table 4 and the latter to lmove a coated work-piece from such table to carrying-away position on the platform 35, and then to return such arms to starting position, one-half of a revolution of the shaft 69 29 being consumed in the forward strokes and one-half in the rearward strokes of such arms. During the forward strokes of the arms 24, 24 the rollers 40, which are carried by the respective arm guiding levers 39,

ce travel on the lower tracks 41% of the respec- -then rearward on the upper tracks 41b of the guide members to communicate 'corre- 70 sponding rocking movements to the levers .39 and arms 24, 24 to raise the Work en-l gagngends of such arms abovethe workpieces which were respectively moved there` by on their forward strokes. When the arms have moved to the rear of the next workpieces to be engaged and moved forward thereby, the rollers 40 drop from the upper guide tracks 41b to the roller tracks 41a, thus effecting a lowering of said arms to work engaging positions. During the rearward movements of the work feeding armsv the .work supporting table 4 has at least a complete revolution communicated thereto from the shaft 16 due to the roller 90 on 85 the clutch shifting lever 91 riding on' the reduced semi-circular portion of the cam 89, thus permitting the spring 94 to effect an engagement of the clutch 93. The cam 84 also acts during the rearward movements 9@ of said arms to raise the push-rod 80 to unseat the air-inlet valve 77, thus perm-itting the passage of operating air or other iuid under pressure to the air brushes employed, a portion of the fluid passing into 95v the cylinders 60 to impart valve opening movements to the plungers 59 and levers and,l a part passing to the valve chambers 5() ofthe spraying instruments, and thence through the fluid discharge nozzles 44 there- 10@ of to draw the surface coating material from the barrel 42 through'its nozzle 43 and discharge it in tine spray form upon the work,

as is well understood in the art. The arrangement and number of the air-brushes is such that the complete interior andexterior surfaces of an article are coated by matter discharged therefrom, it, .of course,4 being understood that the under side of the article being coated is openv to permit an 'interior 11g; spraying thereof by the sprayer or sprayers B. 'l At approximately the time of completion of the rearward stroke of the work feeding arms, the roller 90 on the clutch shifting lever 91 moves onto the broadened por- 115 tion of its cam member 89 to release the engagement of the clutch 93 and Astop the rotation of the work supporting table, and

the roller 86 on the cam 84 rolls .onto the reduced peripheral portion of' such cam, thus 12o permitting a lowering of the push-rod 89 and closing of the air-inlet valve 7'? to stop the spraying action of the sprayer, said valve being maintained in closed posit-ion during the forward strokes of the work, feeding arms. Immediately after th'eair-inlet valve operating roller 86 on the cam 84 lowers vto permit a closing' of such valve the lexhaust-valve operating roller 86 on the cam disk rides onto the peripherally broad- 13o ened portion of its disk, thus opening the exhaust valve 7 8 and maintaining. the same open during the forward strokes of the work feeding arms. A

It is apparent that I have provided a simple and efficient machine which is automatically operable to intermittently feed workpieces to and from a rotatable Work support. to impartrotation to the work support when an article is mounted thereon, and which employs air brushes that are automatically operable to apply a coating material to either or both the inner and outersurfaces of the article during a rotation o-f the work support.

'It is found in practice that a machine of this character is admirably adapted for use inconnection with the painting or surface coating of containers or other similar articles, and that the coating thereof is accomplished with greater eliciency, rapidity and neatness than has heretofore been possible.

It is to be understood that the invention is not limited to any specific construction or arrangement of the parts or to the number of air brushes employed except in so far as such limitations are specified in the claims.

Having thus described my invention, what l claim as new and desire to secure by Letters Patent, is,-- 4

1. In a machine of the class described, a compound oscillatory work-feeding member, and means operable to impart workfeeding movements in one plane to the arm and to raise and vmove the work-engaging part of the member in a different plane during its return movement and then to lower it to the rear of a work piece to be next moved thereby.

2. fn a machine of the class described, a pair of work-moving arms capable of compound oscillatory work-feeding movements, and means for moving such arms to feed separate work pieces in unison and then to return the arms to position to engage and i feed work pieces. Y

3. fn a machine of the class described a pair of work-moving members capable of compound oscillatory movements, one member being adapted to move work pieces into to, and means for imparting compound oscillatory work-feeding movements to said arms and then to return the same to initial work feeding positions.

In a machine of the class described, a table over which the work is fed, a plurality of arms mounted for horizontal andvertical oscillatory movements and adapted to successively act on work pieces to impart intermittent feeding movements thereto, 'and means for imparting ho-rizontal feeding and returning movements to the arms, and vertical swinging movements thereto during their returning movements to adapt them to pass over and to the rear of work pieces nex to be engaged thereby.

6. In a machine of the class described, a work support, a vertical rock shaft, an arm mounted for rocking movements with said shaft4 and for vertical rocking movements relative thereto, means for impartingrocking movements to said shaft to move said arm to and fro to successively move work pieces to a predetermined position on said support, and means automatically operable to impart vertical rocking movements to the arm when the shaft is rocked to raise the varm over and then lower it at the rear of a work piece next to be moved.

7. ln a machine of the class described, a rotatable work-supporting table, and mechanism automatically operable to intermittently rotate said table, and having a plurality of compound oscillatory arms which are moved to successively feed work pieces onto and from said table when t-he table is at rest.

8. A machine of the class described having a horizontally rotatable work-supporting part provided with an axial opening over which a work piece may be disposed, means for applying a surface coating material in spray form through said opening and into a work piece disposed thereover and means for applying a surface coating material in spray form to the exterior surface of a Work piece mounted over said opening.

9. An intermittently rotatable work-supporting table having a centrally ddisposed vertical opening therein, means automatically operable to apply a surface coating material in spray form through said opening and into a registering open end of a work piece, and means automatically operable upon a rotation of said table for applying a surface coating material in. sprayform to the exterior surface of a work piece which is supported by said table.

10. ln combination, means operable to discharge a surface coating material in spray form and having control means, and fluid pressure actuated means for opening said control means.

ll. In a machine of the class described, an intermittently rotatable work support having an opening therein, means operablesupport transversely thereof, for rotating such support when a Work piece is disposed thereon, and for operating the air-brush simultaneously with the rotation of the support to apply a surface coating material in spray form to a Work piece mounted on the support.

18. in a machine of the class described, a horizontally rotatable vvorlr support, an airbrush, and mechanism automatically operable to intermittently rotate said support, and' means for successively moving Work pieces onto and rom the support transversely thereof' when the support is at rest and for operating the air-brush to apply a surface coating material to articles when mounted on and rotating with the support.

14. In a machine oi' the class described, a

hollow standard, a Work-supporting table mounted over said standard and having an annular flange tting down over the standard, said table havin a central opening in communication with t e hollow of the standard, means coacting With said flange to communicate rotary movements to the table,

and means having a part Within the standard and automatically operable to discharge a surface coating material in spray tion to said table relative to the standard,

means for intermittent-ly feeding vvorlr pieces onto the table over said opening and from the table, and means for spraying a surface coating material onto the interior surface of an article when mounted on the table overy the opening therein.

16. ln an article coating machine, a vertical standard, a Work-supporting table mounted for horizontal rotary movements on said standard, means connected with and automatically operable to impart intermitipronze lzontally l rotatable "Work Y iam; te tent -rotary genommen. rito the Atablety and means for moving a Work piecetransverselfyi of the tablef.t o,=. central positiongthergenafv'vh'en the table i555 atleet. y

17. In an a y Ale;coating mach `rc yafiver cal standard, aajawyorkJ-snpporting .'table; mounted 0,1? ill@ ZOIlt-ihlam/ 'llvementsz on* said standard,,srneansconnected Wi-thntlres table fo, ing@ a mtennittent meta e mOi/erneuter: t.w eiste Hilda" mechanisrnifautow 75 matiallywnerafbla urines-aihammam-est. of the. .tab1e temere a uerkapiecei nomma table and to move a succeeding Work pieceftm Centrelmsitiana ,theta-blaas, 18..lna.machine affili Clas es heilig@ 2 VelCL Stildali a fhfnmlly ,zrotY table WOYIkf-Suproitnsf. tablefrmeuntedf thereef1-- means autemeteally Y :Onerablegf @Hintern tentlylofaiethtab @Chennai emmen: @any tremblement vrlsrieetr-entha es table and to move 'a successive Work-pie@'etr to central `position on :.the-,tableg during rereliefetstief 'Id medesimi@ i natale, materialin spraylfor to livforlr-piec-'e. 0.11.59@ the tablefduringv aperio, otrotationlofatheg table. 19.V In an article coatingvmachinaa.

y rung and mechanism connectedl an matically operable to cause abile to have" riodsllr alternate rotating andres to successively move .vvorli p from the table during resting of, the Work piecesbeing fied/"on at the opposite side of its anis! 20. ln a machine of the 'classfhd horizontally rotatable vWork"'siflpporting" I table means @Onnected with .th'ftablegi fr 'ics causing it to have alternate rotating vand resting periods, and mechanismlihaving a compound oscillatory member and automati cally operable to feed a Work piece onto the table during a resting period'thereof and 11o to return to position to engage a' succeeding Work piece during a rotating period of the table.

21. ln a machine of the class described, a horizontally rotatable table having a stationary axis and a centrally disposed opening, means for impart-` ing intermittent rotation to the table, and mechanism automatically operable to intermittently move successive Work pieces across lao the table from one side to the other of its axis, each Work piece .standing at rest over the table opening during a rotating period of the table, and means automatically operable to apply a coating material inv spray form to the interior of a Work piece through the table opening When a Work piece isstanding thereover.

22. ln a machine of the class describeda horizontally rotatable Work-supporting table Work-supporting 115 l having a cent-rally disposed opening therein, means for imparting intermittent rotary movements to the table, mechanism for imparting intermittent feeding movements to work pieces across the table from one side to the other of its axis, each work piece being permitted to rest over the table opening during a rotating period of the table, and means automatically sQperable to apply. in spray form a coating material to the inner and outer surfaces of al1-,article when standing over the table opening, the innery coating being applied through the table opening.

23. In a machine of the class described, a vertical rock shaft, an article feeding-arm projecting transversely from said shafty and adapted to have horizontal rocking movements therewith and vertical rocking movements relative thereto, a lev-er member fulcrumed to said shaft for horizontal rocking movements therewith and vertical rocking movements relative thereto, means guiding said lever to cause it to have predetermined vertical rocking movements when rocking with the shaft, `and connection between said lever and arm for communicating similar vertical rocking movements from one to the other. v

Q4. In a machine of the class described, a rock shaft, two members carried by said shaft for rocking movements therewith and for rocking movements relative thereto in a plane which is transverse to the shaft rocking movements,`means coacting with one of said members to impart predetermined rocking movements thereto when rocking with the shaft, and means connecting said members to cause them to have like rocking movements transverse to the shaft rocking movements.

25. In a machine of the class described, a rock shaft, two lever members carried by lsaid sli-aft for rocking movements there-l with and for` rocking movements relative thereto in the longitudinal plane lof the shaft, one of said members serving asa feeder-arm, guide means for guiding the other of said members to cause it to have predetermined rocking movements i longitudinally of the shaft when rocking with' the 26. In a machine cf the class described,

a horizontally rotatable work-supporting table, a vertical shaft at one side of the' table, a pair of lever members carriedlby the shaft for rocking movements therewith and for rocking movements longitudinal thereof, one of said members constituting a work-feeding arm and projecting over said table, means coacting with the other of said members to impart rockingV movements thereto longitudinally of the shaft when rocked with the shaft, means connecting said members to cause them to have like rocking movements longitudinally of the shaft, and mechanism operableto rock said shaft. .v l

27. In a machine of the class described, a vertically stationary horizontally rotatable work-supporting table, and mechanism having a plurality of work-feeding arms automatically operable to have parallel rocking movements to impart successive work feeding movements to a work piece across the table top. y

28. In a machine of the class described, a horizontally rotatable Work-supporting table, a pair of rock shafts disposed at one side of the table, a work-feeding arm carried by each vshaft for rocking movements therewith and longitudinally thereof, means operable to impart predetermined rocking movements to said arms when the shafts are rocked, and means for imparting rocking movements in unison to the'l shafts to operate said arms to impart successive feeding movements to a work piece across the table to In testimony whereof, I have hereunto signed my name to this specification in the presence of tw'o subscribing Witnesses.

THOMAS A. DE VILBISS.

Witnesses:

C. W. OWEN, FLORENCE Aun. I

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